JP2007029630A - Cloth feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cloth feeding device which smoothly moves a piece from a guide part to the other guide part. <P>SOLUTION: The cloth feeding device 1 turns rightward and leftward, holds cloth between a cloth receiving part 16 and a part 307 for holding buttons and pressing cloth by lowering the part 307 for holding buttons and pressing a fabric connected to a movable body 18 moving back and forth, and feeds the cloth by the backward and forward movements and the rightward and leftward rotations of the movable body 18. A swinging arm 31 turns about a fixed shaft 11 by the rotations of a backward and forward feeding cam body 6. A swinging arm 32 turns about a fixed shaft 35 by the rotations of a common cam body 36 for backward and forward feeding and rightward and leftward feeding. A switching arm 21 connected to the movable body 18 turns about a rotating shaft 25. The piece 22 is provided at the end part of the switching arm 21, and the piece 22 selectively engages a first guide part 33 and a second guide part 34 by the rotations of the switching arm 21. A pawl 101 is provided on the first guide part 33, and a pawl 102 is provided on the second guide part 34. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cloth feeding device that feeds cloth in the front, rear, left, and right.

  2. Description of the Related Art Conventionally, there is a cloth feeding device that performs left and right feeding and forward and backward feeding to transfer a seam corresponding to a button hole (see, for example, Patent Document 1 and Patent Document 2). In the cloth feeding device, the driving body is provided so as to be turnable in the left and right directions and is provided so as to be movable in the front-rear direction. The cloth and buttons placed on the button receiving portion can be moved left and right by shaking the rear end of the driving body to the left and right, and the cloth and buttons can be moved back and forth by moving the driving body back and forth. be able to.

  This cloth feeding device is provided with a left-right feed cam groove for converting the rotational motion of the motor or the like into the left-right rotation of the drive body, and converts the rotational motion of the motor or the like into the back-and-forth motion of the drive body. For this purpose, a longitudinal feed cam groove is provided. Further, in order to diversify the longitudinal movement of the drive body, a plurality of longitudinal feed cam grooves are provided. If one of the plurality of front / rear feed cam grooves is selected, the drive body can be moved back and forth according to the selected front / rear feed cam groove. The drive body can be moved back and forth according to the feed cam groove.

Switching between the front and rear feed cam grooves is as follows. That is, the drive body is provided with a switching lever that rotates about a rotation axis, and the switching lever is provided with a piece. On the other hand, the end of the swing arm is inserted into each of the front and rear feed cam grooves, and each swing arm is provided with an arcuate guide portion along the trajectory due to the rotation of the switching lever of the piece. Also, in each cam groove of both the front and rear feed cams, when the piece moves between both guide parts by the operation of the switching lever, the position of both guide parts coincides with the trajectory of the piece to move. The origin groove that aligns both guides along the trajectory of the switching lever is provided, and when stopping after the end of sewing, the front-rear feed cam stops with the end of the swing arm fitted into this origin groove. Is configured to do. Then, when the operator manually operates the switching lever at the stop after the sewing is finished, the piece is engaged with one of the guide portions of the plurality of swing arms, and is not engaged with the other guide portions. Therefore, the drive body moves back and forth according to the forward and backward feed cam groove corresponding to the engaged guide portion. If you want to move the drive body back and forth according to another longitudinal feed cam groove, you can move the piece from its engaged guide part to another guide part by manually operating the switching lever. The pieces can be engaged.
JP-A-10-99571 JP 2000-279668 A

  By the way, the swinging arm and the guide part are separated from each other so that the swinging arm and the guide part do not hit each other. When a load is applied to the switching lever, and the piece is moved from one guide part to another guide part by the switching lever, the piece is displaced by the load acting on the switching lever, and the gap between these guide parts is obtained. There is a case where the piece cannot be smoothly transferred from one guide part to another guide part.

  Then, the objective of this invention is providing the cloth feeding apparatus which can move a piece from a guide part to another guide part smoothly.

  In order to solve the above-described problems, the invention according to claim 1 is directed to a cloth receiving portion provided on a movable body that is turnable left and right and movable back and forth, and is rotated up and down on the movable body. A cloth presser part that is movably connected and descends to sandwich the cloth between the cloth receiving part, a first guide part that rotates about a shaft by rotation of the first cam body, and the first guide A second guide part provided at a position away from the part and rotated about an axis parallel to the axis of the first guide part by rotation of the second cam body; and parallel to the axis of the first guide part A switching arm coupled to the movable body so as to be pivotable by a pivoting shaft, and provided on the switching arm, moving along an arcuate movement trajectory by the pivoting of the switching arm with respect to the movable body, and A piece selectively engaging with the one guide part and the second guide part, and the first part The id part and the second guide part are formed in an arc shape along the movement trajectory of the piece, and a piece to be selected and engaged with the first guide part or the second guide part by the rotation of the switching arm. In the cloth feeding device that moves the movable body via the cloth holder and moves the cloth sandwiched between the cloth receiving portion and the cloth presser portion to at least one of right and left or front and rear, the first guide portion and the second guide A first claw provided on the first guide portion so as to extend from the first guide portion toward the second guide portion between the guide portions, the first guide portion, and the second guide portion. A second claw provided on the second guide portion so as to extend from the second guide portion toward the first guide portion, and when viewed in the axial direction of the switching arm, The first claw and the second claw intersect each other.

According to the first aspect of the present invention, when the piece moves from the first guide portion to the second guide portion or vice versa by the movement of the switching arm, the piece is disengaged from the first guide portion or the second guide portion, Reaches between the first guide part and the second guide part, but the piece engages with the first claw and the second claw. Therefore, the piece is not caught in the gap between the first guide portion and the second guide portion, and the piece can be smoothly transferred from the first guide portion to the second guide portion or vice versa.
Further, since the two claws intersect when viewed in the axial direction of the switching arm, the claws are not locked, and the rotation of the first guide portion and the second guide portion is not interfered with each other.

  According to a second aspect of the present invention, in the cloth feeding device according to the first aspect, the length of the piece is smaller than an interval between the first guide portion and the second guide portion.

  According to the invention of claim 2, since the length of the piece is smaller than the distance between the first guide portion and the second guide portion, the piece is moved when moving the piece from the first guide portion to the second guide portion or vice versa. Is temporarily disengaged from both the first guide portion and the second guide portion. Even if the piece is disengaged from both the first guide portion and the second guide portion, the piece engages with the first claw and the second claw. Therefore, the piece can be smoothly moved from the first guide portion to the second guide portion or vice versa.

  According to the present invention, the first claw or the second claw prevents the piece from being caught in the gap between the first guide portion and the second guide portion, and the piece is moved from the first guide portion to the second guide portion or Conversely, it can be moved smoothly.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  As shown in FIGS. 1 and 2, the button sewing machine 301 includes a bed portion 302, a base 200 provided at the rear end portion of the bed portion 302, and a vertical trunk portion 303 erected on the base 200. And an arm portion 304 extending forward from the upper portion of the vertical body portion 303 so as to be substantially parallel to the bed portion 302. A needle bar 305 that is moved up and down by a motor is provided at the front end of the arm 304, and a needle 306 is attached to the lower end of the needle bar 305.

  The cloth feeding device 1 to which the present invention is applied is provided from the base 200 to the bed portion 302. Hereinafter, the cloth feeding device 1 will be specifically described.

  As shown in FIGS. 1 to 3, the cloth receiving portion 16 is disposed below the needle bar 305 and on the bed portion 302. The cloth receiving portion 16 is attached to the front end portion of the movable body 18. The movable body 18 extends in the front-rear direction, and a button grip / cloth presser 307 is coupled to the front-rear intermediate portion of the movable body 18. The button grip / cloth presser 307 grips the button at its front end. The button grip and presser foot 307 can be turned up and down around the connecting portion with the movable body 18, but the front end portion of the button grip and presser foot 307 is biased downward by a spring. A hook 308 is provided on the upper part of the button / grip / cloth presser 307, and this hook 308 is hooked on the hook 310 of the presser lifting mechanism 309. The hook 310 is always lifted by the presser lifting mechanism 309 except during sewing. Thus, the front end portion of the button grip / cloth presser 307 is raised against the urging force of the spring. On the other hand, when a user or the like depresses an operation pedal (not shown) to start sewing, the hook 310 is lowered by the presser lifting mechanism 309, and the front end portion of the button gripping / cloth presser 307 is lowered by the spring.

  As shown in FIGS. 1 to 4, a plate-shaped cloth receiving portion 16 is attached to the front end portion of the movable body 18. When the front end of the button grip / cloth presser 307 is urged downward by the spring while the cloth is placed on the cloth receiver 16, the front end of the button grip / cloth presser 307 comes into contact with the cloth receiver 16. , A cloth is sandwiched between them.

  As shown in FIGS. 2 to 4, a long hole 17 that is elongated in the front-rear direction is formed in the front-rear intermediate portion of the movable body 18, and a square piece 20 a is inserted into the long hole 17. The square piece 20a is pivotally supported on the base 200 by a step screw (not shown). The movable body 18 can be rotated around its step screw, and can be moved back and forth by the square piece 20 a and the long hole 17.

  As shown in FIGS. 3, 4, and 6, the movable body 18 has a left end portion of a link 24 connected to the rear of the elongated hole 17 through a vertical rotation shaft 25 so that the link 24 is movable. The body 18 is rotatable about the rotation shaft 25. The right end of the link 24 is connected to the upper surface of the base 200 via a vertical shaft 27, and the link 24 can rotate about the shaft 27 with respect to the base 200. By this link 24, the trajectory of the rotation shaft 25 is restricted to a circular arc in the front-rear direction around the shaft 27.

  As shown in FIGS. 4 and 6, a long hole 19 that is long in the front-rear direction is formed at the rear end of the movable body 18 behind the rotation shaft 25. A link 201 overlaps the rear end of the movable body 18, and a vertical shaft 61 provided at the front end of the link 201 is inserted into the elongated hole 19 through a square piece, and the shaft 61 is movable. 18 is movable in the front-rear direction along the long hole 19. The rear end portion of the link 201 is attached to the upper surface of the base 200 so as to be rotatable around the fixed shaft 203 in the vertical direction.

  As shown in FIGS. 6 and 7, the cam shaft 2 and the cam bodies 4, 6, and 36 are disposed below the base 200. The cam shaft 2 extends in the left-right direction and can rotate about its axis. A disc-shaped front / rear feed cam body 6, left / right feed cam body 4 and front / rear-left / right feed common cam body 36 are fixed to the cam shaft 2 so as to be parallel to each other. And can be rotated together. In FIG. 6, the base 200 is not shown for easy viewing of the drawing.

  A wavy front / rear feed cam groove 5 is formed on the peripheral surface of the front / rear feed cam body 6, and a wavy left / right feed cam groove 3 is formed on the peripheral surface of the left / right feed cam body 4. A wavy front-rear / left-right feed cam groove 37 is formed on the peripheral surface of the. These cam grooves 3, 5, and 37 are formed so as to make a round around the cam shaft 2. The shapes of these cam grooves 3, 5 and 37 are different from each other.

  Above the front-rear feed cam body 6 is provided a first swing arm 31 that is L-shaped when viewed from above. The bent portion of the first swing arm 31 is rotatable around the fixed shaft 11 in the vertical direction and is connected to the upper surface of the base 200, and extends in the front-rear direction from the bent portion to one end of the first swing arm 31. The first swing arm 31 extends from the bent portion to the other end portion in the left-right direction. On the upper surface from the bent portion to the other end portion of the first swing arm 31, an arc-shaped first guide portion 33 is protruded. A roller 14 is attached to the lower surface of one end of the first swing arm 31, and the roller 14 is fitted in the front-rear feed cam groove 5. Therefore, the first swing arm 31 rotates about the fixed shaft 11 as the roller 14 moves left and right along the wave shape of the front and rear feed cam groove 5 as the front and rear feed cam body 6 rotates. It has become. In FIG. 5, the first swing arm 31 is not shown in order to make the drawing easy to see.

  Above the front / rear / left / right feed common cam body 36, a second swinging arm 32 having an L shape as viewed from above is provided. The bent portion of the second swing arm 32 is connected to the upper surface of the base 200 so as to be rotatable around a fixed shaft 35 erected in the vertical direction in parallel with the fixed shaft 11. It extends in the front-rear direction from one part to one end part, and extends in the left-right direction from the bent part of the second swing arm 32 to the other end part. As shown in FIGS. 4 and 5, an arcuate guide portion 39 is projected on the upper surface from the bent portion to one end portion of the second swing arm 32. On the upper surface from the bent portion to the other end portion of the second swing arm 32, an arc-shaped second guide portion 34 is projected. As shown in FIG. 6, a roller 38 is attached to the lower surface of one end portion of the second swing arm 32, and the roller 38 is fitted in the front / rear / left / right feed common cam groove 37. For this reason, the second swing arm 32 moves the roller 38 to the left and right along the wave shape of the front-rear / left / right feed common cam groove 37 as the front / rear / left / right feed common cam body 36 rotates. To rotate.

  Above the left / right feed cam body 4, a longitudinal feed rocking arm 9 that is long in the front / rear direction is provided. The rear end portion of the swing arm 9 for forward / rearward feeding is rotatable around the fixed shaft 8 in the vertical direction and connected to the upper surface of the base 200. As shown in FIGS. 4 and 5, an arcuate guide portion 66 is projected on the upper surface of the swing arm 9 for forward and backward feeding. As shown in FIG. 6, a roller 10 is attached to the lower surface of the front end portion of the swing arm 9 for forward and backward feeding, and the roller 10 is fitted in the left and right feed cam groove 3. Therefore, the swing arm 9 for forward / reverse feed rotates about the fixed shaft 8 by moving the roller 10 left and right along the wave shape of the left / right feed cam groove 3 as the left / right feed cam body 4 rotates. It is like that. Here, the fixed shafts 8, 11 and 35 are parallel to each other.

  As shown in FIGS. 6 and 7, the first guide portion 33 is located to the right of the second guide portion 34, and there is a gap between the left end of the first guide portion 33 and the right end of the second guide portion 34. Is formed. A leaf spring-like first claw 101 is provided at the left end of the first guide portion 33, and a second claw 102 is provided at the right end of the second guide portion 34. The base portion of the first claw 101 is aligned with the rear edge of the first guide portion 33, and the root portion of the second claw 102 is aligned with the rear edge of the second guide portion 34, The claw 101 is narrower than the width of the first guide portion 33, and the second claw 102 is narrower than the width of the second guide portion 34. Further, the radius of curvature of the first claw 101 is smaller than the radius of curvature of the first guide portion 33, and the first claw 101 extends obliquely leftward from the left end of the first guide portion 33 toward the second guide portion 34. I'm out. The curvature radius of the second claw 102 is smaller than the curvature radius of the second guide portion 34, and the second claw 102 extends obliquely rightward from the right end of the second guide portion 34 toward the first guide portion 33. Yes. The first claw 101 is located above the second claw 102, and when viewed in the axial direction of the rotation shaft 25, the fixed shaft 11, and the fixed shaft 35 (viewed from above), the first claw 101 and the second claw Nail 102 crosses.

  Hereinafter, a mechanism for selectively transmitting the rotational movement of the first swing arm 31, the forward / backward swing arm 9, and the second swing arm 32 to the movable body 18 will be described.

  As shown in FIGS. 3 to 5, a left / right feed switching arm 62 is sandwiched between the rear end portion of the movable body 18 and the front end portion of the link 201. An intermediate portion of the left / right feed switching arm 62 is connected to the shaft 61, and the left / right feed switching arm 62 is rotatable around the shaft 61. A piece 64 is provided at the right end of the left / right feed switching arm 62, and a piece 40 is provided at the left end of the left / right feed switching arm 62. The piece 64 is engageable with the guide portion 66, the piece 40 is engageable with the guide portion 39, and the piece 40 is not engaged with the guide portion 39 in a state where the piece 64 is engaged with the guide portion 66, In the state where 40 is engaged with the guide portion 39, the piece 64 is not engaged with the guide portion 66. Further, a switching lever 63 is coupled to the left / right feed switching arm 62, and the left / right feed switching arm 62 can be rotated about the shaft 61 when a user or the like operates the switching lever 63. By such rotation of the left / right feed switching arm 62, the state in which the piece 64 is engaged with the guide portion 66 can be switched to the state in which the piece 40 is engaged with the guide portion 39, or vice versa. In FIG. 6, illustration of the left / right feed switching arm 62 and the switching lever 63 is omitted to make the drawing easier to see.

  As shown in FIGS. 3, 4, and 6, a forward / reverse feed switching arm 21 extending in the front-rear direction is disposed on the movable body 18. The forward / reverse switching arm 21 functions as a switching arm in the present invention. The front end portion of the front / rear feed switching arm 21 is connected to a rotation shaft 25 erected in the vertical direction parallel to the fixed shaft 11, so that the front / rear feed switching arm 21 can rotate about the rotation shaft 25. A piece 22 is provided at the rear end portion of the forward / reverse feed switching arm 21, and the piece 22 moves along an arcuate movement locus by the rotation of the forward / backward feed switching arm 21 around the turning shaft 25. And the 1st guide part 33 and the 2nd guide part 34 which were formed in circular arc shape along the movement track | orbit of this piece 22 are provided, and the piece 22 selectively to the 1st guide part 33 and the 2nd guide part 34 Engageable. That is, when the piece 22 is engaged with the first guide portion 33, the piece 22 is not engaged with the second guide portion 34, and when the piece 22 is engaged with the second guide portion 34, the piece 22 is not engaged with the first guide portion 34. 33 is not engaged. Further, the length of the piece 22 along the arc of the first guide portion 33 and the second guide portion 34 is smaller than the interval between the first guide portion 33 and the second guide portion 34, and the piece 22 is the first guide portion. In a state where it is located in the gap between 33 and the second guide portion 34, neither guide portion 33, 34 is engaged. A switching lever 29 is connected to the front / rear feed switching arm 21 so as to extend rearward. When the user or the like operates the switching lever 29, the left / right feed switching arm 62 rotates about the rotation shaft 25, By the rotation, the piece 22 is selected and engaged with the first guide part 33 or the second guide part 34, and the movable body 18 is moved through the piece 22, and the cloth receiving part 16 and the button grip / cloth presser 307 are moved. The cloth is sent back and forth between the two. In addition, in the respective cam grooves 5 and cam grooves 37 of the front / rear feed cam body 6 and the front / rear-left / right feed common cam body 36, the piece 22 moves between the guide portions 33 and 34 by operating the switching lever 29. The origin portion for aligning both guide portions 33 and guide portions 34 along the trajectory of the switching lever 29 so that the positions of both guide portions 33 and guide portions 34 coincide with the trajectory of the piece 22 moving. (Not shown) are provided. When the button sewing machine 301 is turned on and stopped after the end of sewing, the camshaft 2 causes the rollers 14 and 38 to be engaged with both the cam body 6 and the cam body 36, respectively. It is comprised so that it may stop in the origin position fitted with an origin part. With the above configuration, when the power is turned on and at the end of sewing, that is, in a state where the rollers 14 and 38 are fitted to the origins of the front-rear feed cam body 6 and the front-rear and left-right feed common cam body 36, respectively. When the user or the like operates the switching lever 29, the state in which the piece 22 is engaged with the second guide portion 34 from the state in which the piece 22 is engaged with the first guide portion 33 due to the rotation (rotation) of the forward / reverse feed switching arm 21. Or vice versa. In FIG. 6, the switching lever 29 is not shown in order to make the drawing easy to see.

  In a state where the piece 22 is engaged with the first guide portion 33, the piece 22 is slidable along the first guide portion 33, but the switching lever 29 is rotated around the rotation shaft 25. By restricting with a stopper or the like, the piece 22 is locked. Similarly, in a state where the piece 22 is engaged with the second guide portion 34, the piece 22 is slidable along the first guide portion 33, but the switching lever 29 around the rotation shaft 25 is The piece 22 is locked by restricting the rotation by a stopper or the like.

Next, operation | movement and the usage method of the cloth feeding apparatus 1 are demonstrated.
When the user or the like operates the switching lever 63, the piece 64 is engaged with the guide portion 66 and the piece 40 is detached from the guide portion 39. When the left-right feed cam body 4 rotates in this state, the left-right feed cam groove 3 causes the front-rear feed swing arm 9 to turn left and right about the fixed shaft 8, and the movable body 18 is angularly connected through the left-right feed switching arm 62. It pivots left and right around the piece 20a. Therefore, the front end portion of the movable body 18 is swung to the left and right, and the cloth sandwiched between the cloth receiving portion 16 and the button grip and presser foot 307 is fed to the left and right, and is also gripped by the front end portion of the button grip and presser foot 307. Buttons are sent left and right.

  On the other hand, when the user or the like operates the switching lever 63, the piece 64 is removed from the guide portion 66 and the piece 40 is engaged with the guide portion 39. When the front / rear / left / right feed common cam body 36 rotates in this state, the front / rear / left / right feed common cam groove 37 rotates left and right around the fixed shaft 35 from the bent portion to the front end of the second swing arm 32. The movable body 18 pivots left and right around the square piece 20a through the left and right feed switching arm 62. Therefore, the front end portion of the movable body 18 is swung to the left and right, the cloth sandwiched between the cloth receiving portion 16 and the button grip and presser foot 307 is sent to the left and right, and the front end portion of the button grip and presser foot 307 is gripped. Buttons are sent left and right.

  As described above, the left and right feeds of the button and the cloth have two modes, that is, when the piece 40 is engaged with the guide portion 39 and when the piece 64 is engaged with the guide portion 66.

  Further, the user or the like operates the switching lever 29 to engage the piece 22 with the first guide portion 33. When the forward / reverse feed cam body 6 rotates in this state, the forward / backward feed cam groove 5 rotates back and forth around the fixed shaft 11 from the bent portion to the left end portion of the first swing arm 31, and the forward / backward feed switching arm 21. The movable body 18 moves back and forth via. Therefore, the cloth sandwiched between the cloth receiving portion 16 and the button gripping / holding foot 307 is sent back and forth, and the button gripped at the front end of the button gripping / holding foot 307 is sent back and forth.

  On the other hand, the user or the like operates the switching lever 29 to engage the piece 22 with the second guide portion 34. When the front / rear / left / right feed common cam body 36 rotates in this state, the front / rear / left / right feed common cam groove 37 rotates back and forth around the fixed shaft 35 from the bent portion to the right end of the second swing arm 32. The movable body 18 moves back and forth through the forward / reverse feed switching arm 21. Therefore, the cloth sandwiched between the cloth receiving portion 16 and the button gripping / holding foot 307 is sent back and forth, and the button gripped at the front end of the button gripping / holding foot 307 is sent back and forth.

  As described above, the forward and backward feeding of the button and the cloth has two modes when the piece 22 is engaged with the first guide portion 33 and when the piece 22 is engaged with the second guide portion 34. Here, by changing the position of the piece 22 along the first guide part 33 or changing the position of the second guide part 34 of the piece 22 along the second guide part 34, The amplitude can be changed.

  Since the cam bodies 4, 6 and 36 rotate integrally with the cam shaft 2, the front and rear feeds and the left and right feeds as described above are combined, and the needle 306 moves up and down in accordance with the feed of the buttons and cloth. The button is sewn on the cloth. The period of back and forth movement, the period of left and right movement, and the timing of left and right movement of back and forth movement depend on the shape of the cam grooves 3, 5 and 37.

  When the user or the like operates the switching levers 29 and 63, the needle 306 is stopped and the camshaft 2 is also stopped at the above-described origin position. Then, the user or the like operates the lever 311 to raise the front end portion of the button grip / cloth presser 307 in order to retract the cloth from the cloth receiving portion 16. When the front end of the button grip / cloth presser 307 is in the raised state, the hook 310 engages with the inclined portion 308a of the hook 308, so that a forward load is applied to the movable body 18, but the piece 22 is the first. Since the guide part 33 or the second guide part 34 is engaged, the movable body 18 does not move.

  By rotating the switching lever 63, the user or the like can switch from the state where the piece 40 is engaged with the guide portion 39 to the state where the piece 64 is engaged with the guide portion 66, or vice versa.

On the other hand, in order to move the piece 22 from the first guide portion 33 to the second guide portion 34, the user or the like rotates the switching lever 29 around the rotation shaft 25. Accordingly, the piece 22 slides on the first guide portion 33, the piece 22 is detached from the first guide portion 33, and the piece 22 reaches the gap between the first guide portion 33 and the second guide portion 34. Here, since the forward load is acting on the movable body 18 in the state in which the button grip / cloth presser 307 is raised, the piece 22 has the first guide portion 33 or the second guide portion 34 as shown in FIG. If it deviates from, it will shift | deviate a little forward, but the piece 22 will engage with the 1st nail | claw 101,102. Further, when the user rotates the switching lever 29 around the rotation shaft 25, the piece 22 moves from the claws 101 and 102 to the second guide portion 34.
In order to move the piece 22 from the second guide portion 34 to the first guide portion 33, the switching lever 29 is rotated in the reverse direction.

  As described above, the first claw 101 is provided at the left end of the first guide portion 33, and the second claw 102 is provided at the right end of the second guide portion 34. Since the claws 102 intersect, even when a forward load is acting on the movable body 18 and the piece 22, the piece 22 is smoothly moved from the first guide portion 33 to the second guide portion 34 or vice versa. Can be moved.

  Further, since the gap between the first guide portion 33 and the second guide portion 34 is larger than the piece 22, the piece 22 is temporarily removed from both the first guide portion 33 and the second guide portion 34 and positioned in the gap. Can be made. Even when the piece 22 is once detached from both the first guide portion 33 and the second guide portion 34, the piece 22 engages with the first claw 101 and the second claw 102. Therefore, even if the first swing arm 31 and the second swing arm 32 are displaced and the first guide portion 33 and the second guide portion 34 do not have the same arc shape around the rotation shaft 25, the piece 22 can be smoothed. The first guide portion 33 can be moved to the second guide portion 34 or vice versa.

  Further, when the piece 22 moves from the first guide portion 33 or the second guide portion 34 to the gap between them, the claws 101 and 102 are elastically deformed by the forward displacement of the piece 22. Since the piece 22 is returned backward by the restoring force, the piece 22 can be easily moved from the claws 101 and 102 to the first guide portion 33 or the second guide portion 34.

  Further, since the claws 101 and 102 are arranged so as to be displaced vertically, the claws 101 and 102 do not interfere with the rotation of the swinging arms 31 and 32.

  In addition, this invention is not limited to the said embodiment, You may perform a various improvement and change of a design in the range which does not deviate from the meaning of this invention. For example, in the above embodiment, the front / rear feed cam body 6 and the front / rear-left / right feed common cam body 36 are switched, but a plurality of front / rear feed cam bodies or a plurality of left / right feed cam bodies are provided, You may make it switch each.

2 is a side view of the sewing machine 301. FIG. 1 is a perspective view of a sewing machine 301. FIG. 1 is a perspective view of a cloth feeding device 1 provided in a sewing machine 301. FIG. FIG. 4 is a perspective view of the cloth feeding device 1 shown from an angle different from that of FIG. 3. It is the schematic perspective view which showed the rear part of the cloth feeding apparatus 1 from diagonally upward. 2 is a schematic top view of a rear portion of the cloth feeding device 1. FIG. It is the schematic perspective view which showed the rear part of the cloth feeding apparatus 1 from diagonally upward. It is the schematic perspective view which showed the rear part of the cloth feeding apparatus 1 from diagonally upward.

Explanation of symbols

1 Cloth Feeder 6 Front / Rear Feed Cam Body (First Cam Body)
16 cloth receiving portion 18 movable body 21 forward / reverse feed switching arm 22 piece 33 first guide portion 34 second guide portion 101, 102 claw 36 front-rear / left-feed common cam body (second cam body)
307 Button grip and presser foot (cloth presser part)

Claims (2)

A cloth receiving portion provided on a movable body that is turnable left and right and movable back and forth;
A cloth presser that sandwiches a cloth between the movable body and the cloth receiving part by being connected to the movable body so as to be pivotable up and down;
A first guide portion that rotates about an axis by rotation of the first cam body;
A second guide portion provided at a position away from the first guide portion and rotated around an axis parallel to the axis of the first guide portion by rotation of the second cam body;
A switching arm connected to the movable body so as to be rotatable by a rotation axis parallel to the axis of the first guide portion;
A piece that is provided on the switching arm, moves along an arcuate movement locus by rotation of the switching arm with respect to the movable body, and selectively engages with the first guide portion and the second guide portion; Have
The first guide part and the second guide part are formed in an arc shape along the movement trajectory of the piece,
The movable body is moved through the piece selected and engaged with the first guide part or the second guide part by the rotation of the switching arm and is sandwiched between the cloth receiving part and the cloth presser part. In the cloth feeding device for moving the cloth that is left and right or at least one of the front and back
Between the first guide part and the second guide part, a first claw provided on the first guide part so as to extend from the first guide part toward the second guide part,
A second claw provided on the second guide portion so as to extend from the second guide portion toward the first guide portion between the first guide portion and the second guide portion; ,
The cloth feeding device, wherein the first claw and the second claw intersect each other when viewed in the axial direction of the switching arm.   The cloth feeding device according to claim 1, wherein a length of the piece is smaller than an interval between the first guide part and the second guide part.

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