TW201016917A - Bottom and top feed sewing machine - Google Patents

Abstract

A bottom and top feed sewing machine includes a feed dog and a top feed foot which contact a workpiece on a throat plate from below and above respectively to perform a feeding operation, a bottom side back-and-forth feed mechanism which drives the feed dog back and forth, a bottom side up-and-down feed mechanism which drives the feed dog up and down, a top side back-and-forth feed mechanism which drives the top feed foot back and forth, and a top side up-and-down feed mechanism which drives the top feed foot in an up and down direction. The top side up-and-down feed mechanism includes a cam mechanism which takes out a reciprocating movement from a rotational movement of a rotary shaft which performs a rotational drive. The cam mechanism includes a triangular cam having an outer circumference, a shape of which is obtained by connecting two kinds of circular arcs, each of three vertices of an equilateral triangle being a center of small and large circular arcs, and a cam follower having receiving surfaces which hold the triangular cam therebetween. The triangular cam is fixed and supported on the rotary shaft so as to rotate around a position, which is on a perpendicular line drawn down to a base from one of the vertices and is closer to the base than the center of the equilateral triangle is, and such that, when a needle bar which performs stitching by an up-and-down movement is located at the upper dead point of the up-and-down movement, the top feed foot is located at the upper dead point of the reciprocating movement along the up-and-down direction.

Description

201016917 VI. Description of the Invention: [Technical Field] [Technical Field] The present invention relates to an up-and-down transfer sewing machine provided with an upper feed leg. [previously good winter; j invention background

攸刖 "Up and down transfer seam rushing machine, which has: a moving tooth that moves back and forth from the lower side of the needle plate - in the front-rear direction of the cloth transfer; and moves up and down from the top of the needle plate 1 before and after moving (four) steps In the direction of = the feeding foot; the feeding (four) later _ the transfer of the tooth side of the month. 』 rear transfer mechanism; the transfer of the teeth up and down movement of the transfer side of the upper 2 send mechanism; give the upper send foot The rear transfer mechanism is disposed on the feed side of the feed back and forth; and the upper and lower transfer mechanism is provided on the feed side of the upper feed back and forth. Further, the upper and lower transfer mechanism of the upper feed side has a fixed: a circular eccentric cam on the upper shaft; and a rear end and the eccentric cam cool rod; the length of the upper and lower rods (four) The variation is performed by moving the γ up and down to the wrist; and moving back and forth with the up and down movement of the wrist: the arm crank 'transferred from the bell crank to make the upper feed foot up and down::: before the feed side, the rear transfer mechanism, The system has: from: the opening of the opening, the shaft transmits the back and forth rotation motion to the middle shaft; and the front axle of the middle shaft of the middle shaft is slid, and the back and forth direction of the front and rear directions of the front end of the center shaft is transmitted. Give the cloth foot. Moreover, due to the proper adjustment, the upper and lower movements of the up and down transfer mechanism are transmitted to the upper feed foot by the phase of the back and forth movement based on the front and rear transfer mechanism, so that the feed foot performs elliptical motion, and the lower half of the elliptical motion is utilized. The movement track realizes the transfer action based on the upper feed foot. [PRIOR ART DOCUMENT] Patent Document 1: Japanese Patent No. 3529414 t: SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION FIG. 14 is a view showing an upper and lower transfer mechanism by the above-described feed side. A line diagram of the positional displacement D and the speed displacement V corresponding to the upper and lower directions of the upper feed foot generated by the circular eccentric cam. In the sewing machine that has been transferred from the front to the top, since the upper and lower transfer mechanisms on the upper feed side are taken up and down by the circular eccentric cam from the upper shaft, the positional displacement D is roughly depicted as a cosine curve, which is reduced by the downward curve. When the position reaches approximately 0 o'clock (G point in the figure), the feed foot becomes the sewn object to be lowered and contacted on the needle plate (in addition, 'the height of the needle plate is displayed in the figure 14 The upper feed foot cannot be moved below the needle plate, and is shown in a line diagram for convenience of description in accordance with the trajectory drawn by the assumption that the needle plate does not exist. On the other hand, the speed of the upper feed foot is displaced as shown in the figure, because the upper feed foot will contact the G point of the workpiece to be the fastest, and the following 4 201016917 impact will be reduced. The problem is that the size becomes large, the impact sound or the vibration is large, and the durability of the machine is deteriorated. In order to deal with this problem, there is a method of increasing the strength of the upper feed leg or the supporting structure thereof. However, in this case, the parts are made larger, or a high-quality material or the like is used, so that the manufacturing cost of the sewing machine becomes high. According to the present invention, it is the object of reducing the speed of the upper feed foot when the feed foot is lowered in contact with the object to be sewn.

Means for Solving the Problem Patent Application _ The invention of the first item is a type of sewing machine that moves up and down to move the workpiece by the joint action of the transfer tooth and the upper feed foot, and has the needle plate joined from below. After the upper object is sewn, the transfer operation is performed. (4) 'The sewn object on the needle plate is joined from above, and then the up-and-forward operation of the operation is performed, and the transfer tooth is fed back and forth along the material direction; Giving the transfer tooth=side up and down transfer mechanism: feeding the upper feed forward and backward transfer mechanism along the transfer direction; and moving back and forth in the up and down direction, the second up=wheel=row=drive rotation_rotation Motion==The apex of the system is the size of the center, and the three corner cams of the three-fourth (fourth) are joined to each other by the three-circle of the outer shape having at least the arc. The cam surface of the receiving surface is located at a position on the bottom side from the center point of the above-mentioned equilateral triangle from the above-mentioned (4) moving body; the point of the apex of the triangular bulge toward the bottom line and the line of 201016917 The center is rotated and fixedly supported by the rotating shaft; and when the needle bar for sewing by the up and down movement is located at the top dead center of the vertical movement, the upper feeding foot is located above and below the up and down direction In the manner of the dead center position, the aforementioned triangular cam is fixedly supported by the aforementioned rotating shaft. The invention of claim 2 is characterized in that, in addition to the same configuration as the invention described in the first aspect of the patent application, when the needle bar is at the top dead center, the bottom edge is oriented in the vertical direction or the horizontal direction. The invention of claim 3 is characterized in that, in addition to the same configuration as the invention recited in claim 1 or 2, when the length of one side of the equilateral triangle is 1, the apex to the aforementioned triangular cam The distance between the centers of rotation is 〇·7 or more and 1.0 or less. The invention of claim 4 is characterized in that, in addition to the same configuration as the invention described in claim 3, the position of the center of rotation is the intersection of the perpendicular line and the base. According to the invention of claim 5, the invention relates to a method for moving the seam to be fed up and down by the joint action of the transfer tooth and the upper feed foot, and is provided with: joining the needle plate from below a transfer tooth that performs a transfer operation after the object is sewn; an upper feed leg that performs a transfer operation by joining the object to be sewn on the needle plate from above; a transfer mechanism that feeds the transfer tooth back and forth along the transfer direction; a lower-side transfer mechanism that moves the transfer tooth back and forth along the vertical direction: a back-and-forth transfer mechanism that feeds the feed dog back and forth along the transfer direction; and a back-and-forward movement of the upper feed leg in the up-and-down direction The upper side up-and-down transfer mechanism is characterized in that the upper side up-and-down transfer mechanism includes a cam mechanism that extracts a reciprocating motion from a rotational operation of a rotationally-driven rotary shaft, and the cam mechanism includes an equilateral triangle The three vertices are respectively used as the center of the size of the two kinds of arcs connected to the peripheral shape of the triangular cam 'and to A cam follower having a receiving surface that is opposite to the periphery of the apex with the triangular cam interposed therebetween; the triangular cam is rotated around the apex of each vertex The moth support is in the % rotation axis; the cam follower is moved back and forth by the two sets of synthetic displacements that receive the joint and displacement, and the needle stick is located when the needle is moved up and down. When the top dead center is moved up and down, the upper feed dog is placed in the up and down direction to move to the top dead center, and the two-corner cam is fixedly supported by the rotating shaft. The invention of claim 6 is characterized in that, in addition to the same configuration of the invention described in claim 5, the aforementioned equilateral triangle is located farthest from the apex of the aforementioned cam cam; The bottom edge, • Although the needle bar is located at the top dead center in the vertical direction, the two cams of the cam follower are parallel to each other, and when the needle bar is at the top dead center, the cam is driven. The direction of the body's back and forth is tilted to another. The scope. The invention of claim 7 is characterized in that, in addition to the same configuration of the invention described in claim 5 or 6, the two sets of receiving faces which are mutually aligned, the back and forth movement of the cam follower The direction is tilted 45. . Advantageous Effects of Invention According to the invention of claim 1 or 2, the cam mechanism of the upper side up-and-down transfer mechanism 7 201016917 is taken back and forth by at least one of the triangular cams that are offset from the center of rotation. Moreover, in the positional displacement of the triangular cam in the back and forth direction, the maximum displacement from the - square: the approximate middle position of the maximum displacement of the other side has a large deceleration special needle bar at the top dead center Let the upper feeding foot also be at the top dead center to slap the triangular cam on the rotating shaft. Since the three-pointing wheel is applied to the 'moving up and down' of the foot, it can be placed on the top dead center of the upper feeding foot. The intermediate position deceleration 'the upper feed foot is lowered to contact the object to be sewn' can avoid the falling speed of the upper feed foot to the fastest state. Since the upper U-foot is brought down to the object to be sewn at a low speed, the durability of the impact improving mechanism can be reduced, and the hit by the object can be avoided. Along with this, it is also possible to avoid an increase in production costs due to the reinforcement of the feed. Further, the present invention is designed and manufactured in comparison with the case of designing and manufacturing an intrinsic cam having the same characteristics by designing a two-chao cam which can function as a geometric shape of a peripheral shape, and it is expected that the production cost can be reduced. . In addition, according to the third item of the patent application range, in addition to the low speed at the time of the downward contact of the upper feed foot, the durability of the mechanism, the protection of the object to be sewn, and even the cost can be reduced. In addition, according to the fourth item of the patent application range, the speed can be approximately 〇 at the middle point of the maximum vibration of the field. Therefore, the descending speed at the time of lowering the contact of the upper feed foot is substantially G'. It is possible to improve the durability of the mechanism, the protection of the sewn material, and the cost reduction. The invention of claim 5 or 6 is the upper and lower transfer mechanism of the upper side 201016917

The cam mechanism is configured to take back and forth from the combined displacement of the triangular cam by accepting the displacement of at least two sets of receiving faces. Further, since the triangular cam is displaced in a position in the back and forth direction, the position from the maximum displacement of one side to the middle of the maximum displacement of the other side has a large deceleration. Therefore, 'because the needle bar is at the top dead center', the upper feed pin is also at the top dead center, and the cam is mounted on the rotating shaft. Since the triangular cam is suitable for the up and down movement of the upper feed leg, It can be decelerated in the middle position from the dead point to the bottom dead center on the upper feed leg, and the upper feed pin can be lowered to contact the object to be sewn. Since the upper feed foot is lowered to contact the object to be sewn at a low speed, the impact can be reduced, (4) the structure of the machine is durable, and the object to be sewn can be avoided. Along with this, it is also possible to avoid an increase in production costs due to the reinforcement of the feed. also

The present invention is easier to design and manufacture because of the design and manufacture of the same dragon wheel using the design of the triangular cam which can function to obtain the geometric shape of the peripheral shape, and the reduction in production cost can be expected. Further, according to the seventh item of the patent application range, the lowering speed of the foot when the contact is lowered, the protection of the machine to be sewn and the cost reduction are further realized. BRIEF DESCRIPTION OF THE DRAWINGS In addition to the improvement in durability of the upper feed fabric, the first drawing shows a mechanism diagram of the first embodiment. Outline of the integrated transfer sewing machine Fig. 2 shows the triangular projection in detail. Fig. 3 is an explanatory view of the outer shape of the integrated transfer sewing machine wheel. The structure of the cam mechanism on the side of the side is seen. Fig. 4 is an explanatory view showing the displacement of the X-direction generated by the engagement of the up-and-down moving lever with the rotation of the cam. Fig. 5 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case where the coefficient k = 0.7. Fig. 6 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case where the coefficient k = 0.8. Fig. 7 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case where the coefficient k = 0.866. Fig. 8 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case where the coefficient k = 0.9. Fig. 9 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case where the coefficient k = 1.0. Fig. 10 is a view showing the configuration of a cam mechanism of a second embodiment seen from the face side of the integrated transfer sewing machine. Fig. 11 is a view showing the configuration of a cam mechanism of a third embodiment as seen from the face side of the integrated transfer sewing machine. Fig. 12 is a view showing the configuration of a cam mechanism of a fourth embodiment seen from the face side of the integrated transfer sewing machine. Fig. 13 is a line diagram showing positional displacement and speed displacement caused by the cam mechanism of the fourth embodiment in a certain direction. Figure 14 is a line diagram of positional displacement and velocity displacement produced by a conventional cam mechanism in a certain direction. C implementation! 1 10 201016917 BEST MODE FOR CARRYING OUT THE INVENTION (The overall configuration of the first embodiment)

The first embodiment of the present invention will be described in detail based on Figs. 1 to 9. In the present embodiment, it is a type of side material (4) in which the integrated person of the above-mentioned lower transfer direction is transferred. The comprehensive cut Wei shout ig, the needle stick 11 with two holding _ needles; the upper feeding foot for the sewing object on the needle board to be picked up from the top! 2; with the upper feed foot 12 to move up; the moving cloth foot 13; the quilt on the (four) object from below = 乍 transfer tooth 14 '· the sewing machine motor that is the main driving source of the sewing operation] 5'·The upper shaft 16 as a rotating shaft by the sewing machine 15 is rotated; the lower shaft 18 is driven by the upper shaft 16 and the buckle is turned by the horse button; The moving needle moves up and down 'the upper and lower transfer mechanisms 4 前后 forward and backward movements of the needle bar U and the upper feed foot 12 along the cloth transfer direction; the upper side of the upper and lower feed legs are moved up and down The transfer mechanism 5〇; the lower front and rear transfer mechanism % that moves the transfer tooth 14 back and forth along the cloth transfer direction; the lower side upper and lower transfer mechanism 8 that gives the transfer tooth 14 up and down operation; used to adjust the transfer tooth 14 The feed adjustment mechanism 9 of the transfer amount; and the sewing frame 2 of each of the above-mentioned structures. In the following description, it is set to be parallel to the upper surface of the needle plate of the integrated transfer seam rushing machine 10, and the direction along the cloth transfer direction is the X-axis direction, which is parallel to the top surface of the sewing machine and orthogonal to the Χ-axis direction. The direction is the x-axis direction, and the direction perpendicular to the slit needle plate is the 2-axis direction. Further, the needle board of the integrated transfer sewing machine 10 is provided in such a manner that the seam rush machine 1 () can be made flat on the surface of the water when it is placed on a horizontal surface. (Needle Up and Down Movement Mechanism) The needle up/down movement mechanism 30 is provided with a oscillating weight 31 that is fixedly mounted at one end portion of the shaft 16 along the γ-axis direction (indicated by a straight line in the second diagram); An eccentric rod 32 rotatably supported at one end of the center of rotation of the hammer 31 is eccentrically mounted; and a lost needle holder 33 fixed to the needle bar. The eccentric rod 32 is connected to the oscillating weight 31 by a branch along the y-axis direction, and is connected to the pin holder 33 by a fulcrum along the γ-axis direction. With this configuration, the needle up/down moving mechanism 30 can change the rotational motion of the upper shaft 16 to cause the needle bar U to move back and forth in the up and down direction. (Lower vertical transfer mechanism) The lower vertical transfer mechanism 80 includes a vertical movement cam 81 that is fixedly supported by a circular eccentric cam of the lower axis 18 along the γ-axis direction; (4), the cam 81 can be moved up and down The rod 82 is rotated up and down at the end of the _ end; the loading and unloading shaft 83 for performing the reciprocating motion; the transmission armrest 84 which is equipped with the gigagram moving up and down 83 and rotating around the up and down transfer shaft 83; The up-and-down transfer wrist 85 equipped with the vertical transfer shaft 83 and rotating around the vertical transfer shaft; and the link connecting the one end portion of the transfer table 19 on which the transfer tooth 14 is placed and the rotational end portion of the upper and lower transfer wrist 84 Body 86 ° The above-described transmission wrist 84 is fixedly supported by the vertical transfer shaft 83, and its longitudinal direction is substantially oriented in the z-axis direction. Further, at the end of the rotation of the transmission shaft 84, the other end portion of the vertical movement lever 82 is coupled. On the other hand, at 12 201016917, one end portion of the rod 82 is moved up and down, and since the upper and lower moving cam 81 is moved around the shaft 18, the rotation end portion of the transmission wrist 84 is only transmitted back and forth along the X-axis direction. . Further, the rotational end portion of the transmission wrist 84 is rotated back and forth along the X-axis direction, and the vertical transfer shaft 83 is rotated. Further, the upper and lower transfer wrists 85 which are fixedly supported by one end portion of the vertical transfer shaft 83 are oriented substantially in the longitudinal direction along the X-axis direction. As a result, as the upper and lower transfer shafts 83 rotate back and forth, the rotational end portion of the vertical transfer wrist 85 rotates back and forth in the up and down direction, and the end portion of the transfer table 19 is rotated back and forth by the link body 86. (lower forward and backward transfer mechanism) The lower front and rear transfer mechanism 70 includes a front and rear moving cam 71 that is fixedly supported by a circular eccentric cam of the lower shaft 18; and a front and rear moving lever 72 that can rotate the front and rear moving cam at one end; a front-rear transfer shaft 73 that performs a back-and-forth rotation motion; a transmission wrist 74 that is fixedly mounted on the front-rear transfer shaft 73 and rotates around the front-rear transfer shaft 73; and connects the other end portion of the front-rear movement rod 72 and the rotation of the transmission wrist 74 The end of the bell crank is; and the wrist 76 is fixedly attached to the front and rear transfer shaft 73 and is rotated back and forth around the front and rear transfer shaft 73. The transmission wrist 74 is fixedly supported by the front and rear transfer shafts 73, and its longitudinal direction is substantially oriented in the z-axis direction. Therefore, the rotational end portion of the transmission wrist 74 is rotated back and forth substantially in the X-axis direction. The bell crank 75' first connecting point 75a is coupled to the other end of the front and rear moving rod 72, and the second connecting point 7513 is coupled to the rotating end 13 of the transmission wrist 74 201016917, and the second of the British cigarette arm 75 The connection point 75c is changed in the direction of the xz plane by the movement mechanism 90' which will be described later. As a result, when the end portion of the front and rear moving lever 72 is moved by the front moving cam 71, the first connecting point a of the bell crank 75 moves back and forth in the manner in which the 18 is engaged, and the third connecting point Move back and forth in the direction specified by the transfer adjustment mechanism 90 and at the second joint point that is coupled to the rotational end of the transfer wrist 74

75b is delivered with the third connection point 75. The movement back and forth in the X-axis direction component is the same degree of motion. As a result, the front-rear transfer shaft 73 and the front-rear transfer wrist 76 are rotated back and forth by the difficulty of the transfer adjustment mechanism %. The rearward movement of the wrist 76 is carried out by the fixed front and rear transfer shafts 73, and the longitudinal direction thereof is oriented substantially in the direction of the two axes. Therefore, the rotational end 4 of the front and rear transfer wrists is rotated generally back and forth along the z-axis direction, and the back-and-forth transfer of the forward-backward transfer 73 is applied to the transfer (four) for the back and forth direction. The transfer station 19 is provided by the lower side of the transfer machine lion as described above.

- The end moves back and forth up and down, and the other side is fed back to the other side by the lower side forward and backward transfer mechanism %. Since the material mechanism Μ, 8q moves back and forth with the slit, the blade motor 15 as the driving source, the cycle is __. Therefore, the phase of the reciprocating motion transmitted to the transfer table I9 by the direction or posture of the members constituting each of the transfer mechanisms 7A, 8G is appropriately adjusted and combined so that the transfer teeth 14 cut into the transfer table 19 are transported in the cloth transfer direction. Perform a longer _ shape movement. The less-transporting tooth 14' is configured to engage the object to be sewn from the lower side of the needle plate from the lower side by the upper end portion of the upper portion 14 of the upper portion 14 201016917 by its ellipse B). To make it move. (Transfer Adjustment Mechanism) The transfer adjustment mechanism 90 includes a transfer adjustment motor 91 that is a pulse motor that is a drive source of the transfer adjustment mechanism, and an output wrist 92 that rotates with the output shaft of the transfer adjustment motor 91 as an axis. a square wire shaft 93 of a third joint point 75c of the bell crank 75 of the lower front and rear transfer mechanism 70; a substantially cylindrical angle adjusting body 94 having a guide groove to slidably support the square wire shaft 93; The body 94 is an input wrist 95 that rotates as an axis; and a link body 96 that connects the rotational end of the output wrist 92 with the rotational portion of the input wrist. The angle adjusting body 94 is formed with a part of a circular guide groove along the radial direction thereof, and the square wire shaft % is fitted therein, and can be moved back and forth along the guiding groove. Moreover, the angle adjusting body 94 is such that the center line of the cylindrical shape can face the direction along the Y axis, and can be surrounded by the auxiliary frame.

The third joint point of the arm crank 75 is doubled and the square wire shaft 93 can be retracted. Further, M U_ Α is determined based on the moving direction of the double triple connecting point 75e of the lower front and rear transfer mechanism 7〇, and _4 of the transfer direction (X direction) of the transfer tooth 14 is adjusted. The rotation of the angle adjusting body 94 is given by the adjustment motor 91 to the output wrist 92, the link body 96, and the wheeled face 95. The adjustment of the motor 91 in this manner is performed in accordance with a control knitting command based on the transfer amount of the control means of the integrated transfer sewing machine 10, which is not shown. 15 201016917 (upper front and rear transfer mechanism) The upper rearward transfer mechanism 40 obtains the swing driving force of the needle bar 11 and the upper feed leg from the lower front and rear transfer mechanism 7 〇 before and after the transfer shaft 73, thereby facilitating the transfer The teeth 14 are synchronized with the upper feed foot 12. In other words, the upper front and rear transfer mechanism 40 includes a needle bar swinging table 41 that can support the needle bar 丨丨 and the support bar 20 of the upper feed leg 12 to move up and down, and a needle that can be supported by swinging the needle bar swinging table 41. a swinging shaft 42; an output wrist 43 fixedly supported at one end of the front and rear transfer shafts 73; an input wrist 44 fixedly supported at one end of the needle swinging shaft 42 while extending downward; and a connection@output wrist 43 The end portion is rotated and the link body 45 of the rotational end portion of the wrist 44 is input. The needle bar swinging shaft 42 is rotatably supported in the sewing frame along the γ-axis direction, and the needle bar swinging table 41 is centered on the needle bar swinging shaft 42 and is swinged by the body swing shaft 42 The feed leg 12 is placed on the lower end portion of the needle bar u and the lower end portion of the bar 20 so as to be movable back and forth along the z-axis direction (the direction in which the feed is wide). On the other hand, the needle bar swinging shaft 42 is rotated from the front and rear to rotate the shaft 73, and is transmitted through the output wrist 43, the link body 45, and the input wrist 44, thereby rotating the feed tooth 14 and the upper feed cloth. The foot 12 and the needle bar 11 are synchronously moved back and forth along the feeding direction. (Upper vertical transfer mechanism) The upper vertical transfer mechanism 5G is provided with an upper and lower movable lever which is a cam follower which is held by the ID fixed branch on the upper shaft 16 and the angular wheel 61 at one end. 62; a transfer wrist 54 that is moved up and down, is fixedly mounted on the upper and lower transfer shaft 53 and rotates around the up and down transfer shaft 53 16 201016917; is fixedly mounted on the upper and lower transfer shaft 53 and is above and below The upper and lower transfer wrists 55 are rotated around the transfer shaft 53; the first to third connection points 56a, 56b, 56c are connected to the upper and lower transfer wrist 55 side, the upper feed leg n side, and the cloth foot 13 side. Crank %; the link body 57' that connects the first connection point 56a with the rotational end of the up-and-down transfer wrist 55 is connected to the four-bar body 58 of the support bar 2〇 of the second connection point 56 on the feed pin 12, And the third link point is allocated. The link body 59 of the support rod 21 is supported by the support foot. The above-described triangular cam 61 and up-and-down moving lever 62 have substantially the same back-and-forth displacement in the X-axis direction by the same operation, but these will be described in detail later. The #手腕54 is disposed substantially in the z-drawing direction. Since the upper and lower moving rods 62 are displaced back and forth along the x-axis direction to enter the rotating end portion, the forward turning motion can be transmitted to the upper and lower transfer shafts 53. On the other hand, the up-and-down transfer wrist 55 is also disposed in the two-axis direction by the upward/reverse rotation of the upper feed shaft 53, and the rotational end portion of the up-and-down transfer wrist 55 also moves back and forth along the X-axis direction. The bell crank 56 has a triangular shape, and one side of the second connecting point 56b and the third connecting point is substantially oriented in the X-axis direction, and the first connecting point 56a is disposed in a posture above the side. With such a configuration, when the first joint point is moved in the other direction (toward the second joint point) along the direction of the x-axis, the bell crank % makes the second joint point fine for the third joint point. The downward rotation is performed, and the upper feed is lowered. Further, when the other side (moving toward the third connection point 56e side) that moves back and forth along the X-axis direction is input 17 201016917, the double # crank 56 rotates the third connection point 56c by the second connection point 56b, and the third connection point 56c is rotated. Decrease the cloth (four). In addition, the upper feed foot 12 (the cloth foot 13), when it reaches the needle plate by the lowering action, cannot be lowered to be lower than the needle plate, and the cloth feed foot n is raised on the ground (the upper feed foot (7) will rise. That is, when the upper feed dog 12 performs the lowering operation, the lifting operation is performed in conjunction with the cloth (4). When the feeding leg 13 performs the lowering operation, the upper feeding leg 12 is lifted up. The up and down movement of the foot 12 and the up and down movement of the cloth foot 13 are performed one stroke each time between the rotation of the upper shaft 16. (The cam mechanism having the upper side upper and lower transfer mechanism) The aforementioned triangular cam 61 and the up and down moving rod Fig. 2 is a view showing the outer shape of the triangular cam 61 in detail. Fig. 3 is a view showing the configuration of the cam mechanism 6A viewed from the face of the sewing machine 1. The two-corner cam 61 is a structure. The peripheral shape formed by the arcs of the three vertices of the equilateral triangle as the center is the cam surface. The triangular cam 61 is the vertex of the right triangle. Center and package The radius R of the entire radius of the equilateral triangle and the angle of the middle, the angle 60. The arc of the outer edge of the sector (as a large arc A) forms a radius r and a central angle on the opposite side of the large arc A. It is formed by the vertices of the arc of 60 (♦ is a small arc a), and is a peripheral shape that connects the ends of the large arc and the small arc. In addition, the radius R and the small circle of the large arc A The radius r of the arc a and the length T of the rim of the equilateral triangle are in a manner that R = r + T can be established. With such a peripheral shape 'triangular cam 61, the width of the line passing through the vertex 18 201016917 can often It is r+R. The conventional triangular cam has been rotated around the outer diameter of the equilateral triangle for the outer diameter. On the other hand, it is suitable for the triangular cam of the slitting machine 1〇 of the present invention. 61, is a position on the perpendicular line P descending from the apex to the corresponding bottom edge and farther than the center point c of the regular triangle as the center of rotation S. "In order to reduce the weight of the vertical with the other two bottoms, The difference 'is called the bottom edge U. In addition, by turning the cam of the triangular cam 61 The heart s is configured as described above, and the bottom edge sighs to be closer to the rotation than the other two sides (S) (ie, the configuration of the three bottom edges closest to the rotation center s). Also, because the above-mentioned triangular cam 61 is fixed to the branch Since the upper shaft 16 is rotated completely when the vertical movement of the needle bar U is completed, that is, the triangular cam 61 will also rotate - one circumference in one stroke of the needle bar 11. Further, the triangular cam 19 201016917 and /D are square The cam receiving faces 65' 66 of one of the two opposite sides are aligned with each other, and further, parallel with the upper and lower transfer shafts 53. Further, the cam receiving faces 65 66 are substantially opposite to the direction in which the arms 54 are to be imparted ( Here, the longitudinal direction of the rod portion 63 is orthogonal. These cam receiving surfaces 65, 66 urge the transmission arm 54 and the vertical transfer shaft 53 to rotate back and forth by the displacement received from the two-corner cam 61. The displacement received by the X's contact surface 67'68 is absorbed by the upper and lower moving rods 62 being rotated about the segment screw 69, and is almost not transmitted as a displacement on the side of the transmission wrist 54. ❹

The description of the field is related to the change of the speed and the speed in the X-axis direction 4 to the transmission arm 54 by the cam receiving faces 65, 66 of the above-described triangular cam 61 and the up-and-down moving lever 62, and the other two-corner cam 61 The relationship of the position of the center of rotation Fig. 4 shows that the position of the center point C of the triangular cam 61 in the X-axis direction is not transmitted from the up and down movement levers to the X of the transmission wrist 54 in accordance with the rotation of the two-corner cam 61. The displacement in the axial direction is called the pumping angle of the vehicle 16 in the first paste state and the phase of the cam cam 〇 are respectively referred to as 〇. The triangular cam 61 is rotated in the clockwise direction as a premise. The axis angle and the phase of the triangular cam 61 are respectively sent in the state of g; and the angle is the upper (four); the phase of the two-corner cam 61 is (10), and the position of the three-camera is triangular. Since the position of the center point C of the convex _ is the center of the amplitude of the magical direction, the position is explained as the displacement 。. The displacement of the other direction has little effect on the displacement in the X direction. The displacement in the 2 direction is displayed as 〇. The axis of the upper shaft 16 The degree is θ, and the X-axis of the center point C of the triangular cam 61: 20 When the displacement of the 201016917 direction is f(0), the center point C of the triangular cam 61 is displayed, and the interval f(e)= is 0 to 30. —0.5T —kTsin(0 —(π/2) is in the interval 30~90. f(0) = 0.5Τ — Tcos(0 — (π/6)— k · Τ · sin(0 — (π/ 2) In the range of 90 to 150° 玎0)=-〇.5丁+丁.〇3(0-(571/6)-k · Τ · sin(0—(π/2) at 150~210° The interval f(e) = 0.5T - kTsin(e-(7r/2) is 0 in the interval of 210~270°) = -〇.5丁+1^〇8(0 — (771/6) — k · T · sin(0—(π/2) in the range of 270~330° Han 0) = 〇.5丁+丁(:〇3(0-(5兀/6)-k · Τ · sin( 0 — (π/2) In the range of 330 to 360°, f(0) = — 0.5Τ - k · Τ · sin(0 — (π/2) is displaced. In addition, in the equations k, The ratio of the length T of one side of the regular triangle to the distance from the vertex of the equilateral triangle to the center of rotation S. The speed Γ(θ) of the center point C of the triangular cam 61 in each section becomes: 30. The interval Γ(θ)=—kTcos(0—(π/2) is in the range of 30~90° f,(0) = Tsi n(e -(Ti/6)-k . Τ · cos(0 - (π/2) in the range of 90~150°[,(0)=—丁8 ratio(0 — (571/6)- k · Τ · cos(0 – (π/2) in the interval 150-210°, (0)=—kT· cos(0-(π/2) 21 201016917 in the interval of 210~270 ί*' (θ ) = — Tsin(0 — (7π/6) ~~ k · Τ · cos(0 — (π/2) Between 270 and 330° Γ(θ) = — Tsin(0 — (5π/〇— k · Τ · cos(0 – (π/2) is in the range of 330~360° θ(θ) = — k . Τ · cos(0 –(π/2). Here, the relationship between the positional displacement D of the position of the center point c of the triangular cam 61 of the coefficient k of the different case and the speed displacement V is shown in Figs. 5 to 8 . Thus, the line map of the positional displacement D and the speed displacement v of the fifth to eighth figures will be

The position f(e) and the speed Γ are in the range of 0 to 360. The entire interval is continuously connected and is displayed. At the point of the G point of the figure, the upper feed foot 〖2 will fall into contact with the object to be sewn. Here, the G point is set just in the middle of the upper and lower amplitudes. Fig. 5 shows the case where k = 〇.7, Fig. 6 is k = 〇 8, Fig. 7 is k = 0.866, Fig. 8 is k = 0.9, and Fig. 9 is k = 1 〇. The value of k 0.866 in Fig. 7 is the rotating towel of the above-described three-chao cam 61. s is set in the case where the vertical line "the parent point of the bottom edge u is 'at this time'. It can be seen that the upper feed foot η is lowered in contact with the phase of the G point of the object to be sewn, and its velocity v = 〇. Rotating center becomes

In the case of kG.7 to 1.G in the vicinity, it is also known that the phase of the g-point is compared with the highest speed of the rise or fall, and the upper feed leg 12 is lowered in contact with the workpiece at a speed of half or less. That is, it can be seen that the speed can be sufficiently reduced when the upper feed leg I] is lowered. (The operation of the integrated transfer sewing machine), [彳 彳 纟 纟 r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r r By the lower side rear transfer mechanism 70 and the lower vertical transfer mechanism 22 201016917 80, the transfer tooth 14 is elliptically moved, and the feed operation is performed from below the object to be sewn. Further, the upper feed leg 12 and the cloth feed leg 13' are moved up and down by the upper side up-and-down transfer mechanism 50, and the upper leg 12 is fed upward, and the upper and lower movements are performed together with the needle bar.

Further, the front and rear transfer shafts 73 of the lower front and rear transfer mechanisms 70 give the swing operation upper and lower transfer mechanisms 40 a swing operation in the front and rear directions of the needle bar 11 and the upper feed pins 12. At this time, the lower front and rear transfer mechanism 70 causes the needle bar to swing to the rear when it is raised with the upper feed leg 12, and swings to the front when the needle bar u and the upper feed leg 12 are lowered. When the sewing needle is inserted into the object to be sewn, the upper feeding foot 12 can be transferred, and even if there is a weight of the sewn material or a thick article, an effective transfer can be realized. Further, based on the upper feeding foot, the transfer is performed. The transfer operation of the transfer tooth 14 is performed simultaneously, and the transfer can be effectively performed from such an action. The impact of the upper side upper and lower transfer mechanism 50 is provided with the aforementioned cam 6〇, so that the upper feed leg 12 is dead. When the point drops to the bottom dead center, the temporary drop speed at the middle point is decelerated to 〇, which can reduce the lower contact of the upper feed foot 12 (the effect of the integrated transfer sewing machine). For the triangular cam 6 which is offset by the center of rotation, the upper and lower moving rods 6 are urged to receive the displacements 65 and 66 to take the displacement and take back and forth. Moreover, the triangular cam is in a certain backward direction (here, the X-axis direction). Position displacement The maximum displacement from the maximum displacement to the other side is held in the middle of the position = 23 201016917 Deceleration hold', so this is converted into a back and forth rotation and transmitted to the up and down transfer shaft 53 'Because it is applied and sent The up and down movement of the cloth (4) can be decelerated from the top dead center of the upper feed foot 12 to the middle of the bottom dead center, so that the state in which the descending speed is the fastest when the upper feed foot 12 is lowered in contact is avoided. By lowering the contact at a low speed and reducing the impact, the durability of the mechanism can be improved while avoiding heavy hitting of the sewn material. At the same time, the production cost can be avoided due to the reinforcement of the material foot. In particular, the integrated transfer seam machine 1 〇, the center of rotation of the triangular cam 61 is set at the intersection s of the perpendicular line p descending from the vertex of the equilateral triangle and the bottom edge u, so that the velocity of the intermediate point of the two phases at which the maximum amplitude is generated is 〇, The upper feed dog 12 can be adjusted to be lowered and contacted with the needle plate at the intermediate point. Therefore, the lowering speed of the upper feed foot 12 when contacting the object to be sewn can be substantially 〇, which can be more effectively realized. The improvement of the durability, the protection of the object to be sewn, and the reduction of the cost. (Second embodiment) Another example of the cam mechanism will be described based on Fig. 10 .

The cam mechanism 60A includes the same triangular cam 61 as described above, a Q double-shaped up-and-down moving lever 62A', and a link body 67 that transmits the swinging motion of the vertical moving lever 62A from the triangular cam 61 to the transmission wrist 54. Eight. The up-and-down moving lever 62A is constituted by a lever portion 63A that is pivoted in the sewing frame by the support shaft 69A, and an engaging portion 64A that is engaged with the cam cam 61 at the other end of the lever portion 63A. . The engaging portion 64A is provided with a pair of cam receiving surfaces 65 A and 66A that are joined to the outer periphery like the corner cam 61. The cam receiving faces 65A, 66A are planes parallel to the longitudinal direction 24 201016917 of the rod portion 63A, whereby the vertical movement lever 62A can be rotated about the support shaft 69A. Further, the vertical movement lever 62A is disposed substantially along the z-axis direction unlike the upper and lower movement levers 62. The swinging motion generated by the engaging portion 64A of the vertical movement lever 62A is transmitted to the rotational end portion of the transmission wrist 54 by the link body 67A. In this case, the two-corner cam 61 is fixed to the upper shaft 16 by adjusting the phase of the upper feed dog 12 at the top dead center when the needle bar 11 is at the top dead center. As a result, At the top dead center of the needle bar, the bottom side U of the cam lobe 61 is in a state of being vertically vertical. By assembling the cam mechanism 60A in place of the cam mechanism 60 to the integrated transfer sewing machine 10, the same effect as the above-described integrated transfer sewing machine 1 can be obtained. (Third Embodiment) Another example of the cam mechanism will be described based on Fig. 11 . The cam mechanism 60B includes a triangular φ cam 61 similar to that of the first embodiment, a double-shaped up-and-down moving lever 62A similar to the second embodiment, and a link body 67B, which is transmitted and transmitted by the cam mechanism 60B. The wrist 54 is constructed to form a four-bar linkage mechanism. The vertical movement lever 62A connects the one end portion of the rod portion 63A to the rotation end portion of the transmission arm 54 by the segment screw 69 in a state substantially along the X-axis direction.

Further, the link body 67B is rotatably coupled to the sewing frame by the support shaft 68B at one end, and the other end portion is coupled to the engaging portion 64A of the vertical movement lever 62A via the segment screw 66B. As a result, the engaging portion 64A of the vertical movement lever 62A is oscillated in a direction perpendicular to the longitudinal direction of the rod portions 63A 25 201016917 of the vertical movement lever 62A via the cam cam 61. Although the direction of the swinging motion does not coincide with the direction of the pivoting motion of the transmission arm 54, the engaging portion 64A side of the up-and-down moving lever 62A is restricted by the trajectory of the movement of the link body 67B, so that the lever 62A is moved up and down. The length direction of the stem portion 63A will also move back and forth to cause the transmission wrist 54 to rotate back and forth. Further, in this case, the triangular cam 61 is also attached to the upper shaft 16 when the needle bar is located at the top of the dead line, so that the upper feed leg 12 can be adjusted at the top dead center. However, in this case, when the needle bar u is at the top dead center position, as shown in Fig. 11, the bottom side U of the cam gear 61 is in a state of being horizontally oriented. Therefore, by incorporating the cam mechanism 60B in place of the cam mechanism 6A and assembling it to the integrated transfer slitting machine 10, the same effect as the above-described integrated transfer sewing machine 1 can be obtained. (Fourth embodiment) Another example of the cam mechanism will be described based on Figs. 11 and 13 . The cam mechanism 60C includes a triangular cam 61C that is fixedly supported by the upper shaft 16 and has a peripheral shape similar to that of the triangular cam 61, and the position of the center of rotation coincides with one of the points of the equilateral triangle. The end portion holds the up and down movement lever 62C which is rotatable by the two-corner cam 61C. Further, the up-and-down moving lever 62C is: a lever portion of the transmission screw that rotatably couples one end portion of the rotational end portion of the transmission arm 54 and a cam cam 61C at the other end portion of the one-rod portion 63C The combination of the joint (four) = Cheng. The engaging portion 64C' is formed in a ring shape, and a square opening 26 201016917 is formed inside the opening, and the length of one side of the inner square is set to r + R, and the triangular cam 61C is accommodated in the state in which the triangular cam 61C is housed inside. The structure of the combination. Further, a group of cam receiving faces 65C, 66C which are opposite to each other along the square are parallel to each other, and are parallel to the upper and lower transfer shafts 53. Further, the cam receiving faces 65C and 66C are substantially 45 in the direction in which the arm 54 is to be fed (in the longitudinal direction of the tie portion 63C). The slope. A pair of cam receiving faces 67C, 68C on both sides of the square are also parallel to each other, and are parallel to the upper and lower transfer shafts 53. Further, the cam receiving faces 67c and 68C are inclined at about 45 in the direction in which the arm 54 is to be fed (here, the longitudinal direction of the lever portion 63C), and the cam receiving faces 65 (:, 66 (: The result is orthogonal. As a result, the rod 62C is moved up and down, and the displacements formed by the displacement of the receiving faces 65C, 66C and 67C, 68C of the two sets respectively from the triangular cam 6ic are given to the longitudinal direction. The two-corner cam 61C, when the needle bar η is at the top dead center, adjusts the phase of the upper feed leg 12 at the top dead center and is fixedly mounted on the upper shaft 16. Further, the rotation from the two-corner cam 6ic The center becomes the farthest bottom edge u (in this case, not the bottom edge of the rotating center but the farthest bottom edge), when the needle bar is at its top dead center, as shown in Fig. 12, it becomes vertical The state of the direction. Further, when the needle bar 11 is at its top dead center, the four cam receiving faces 65C, 66c, 67c, 68C are viewed from the Y-axis direction for the up-and-down moving lever 62 (the direction of the back and forth movement is substantially It becomes the inclination of 45. In addition, each cam accepts a face, 66C, 67C, 6SC The aforementioned inclination angle is preferably in the range of 4 〇 to 45. Fig. 13 shows the positional displacement d and the speed 27 201016917 degree displacement V based on the cam mechanism 6 〇 c. As shown, the cam mechanism 60C There is a period of speed deceleration between the maximum amplitude of one side and the maximum amplitude of the other side. When the cam mechanism 6〇C is used for the upper and lower legs 12 to move up and down, it can be prompted to The speed is decelerated on the way from the top dead center to the bottom dead center, and the speed can be extinguished when the contact is lowered. Therefore, by assembling the cam mechanism 60C in place of the cam mechanism 6〇, the integrated transfer sewing machine 1 is assembled, and the integrated transfer can be obtained. The same effect of the sewing machine.

Further, in the present embodiment, the triangular cam is fixedly supported by the upper shaft 16, and the shaft may be fixed to the other shaft as long as it is a shaft that is rotated one turn for the needle bar U. It is to be understood that other embodiments may be made without departing from the scope of the invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing the schematic configuration of an integrated transfer shaft machine of the first embodiment. The second drawing shows an explanatory view of the outer shape of the triangular cam in detail.

Fig. 3 is a view showing the configuration of the cam mechanism viewed from the face side of the integrated transfer slot field. Fig. 4 is an explanatory view showing the displacement of the X-direction caused by the rotation of the cam cam in the engaging portion of the up-and-down moving lever. Figure 5 is a line graph showing the positional displacement and velocity displacement produced by the brother in a certain direction of the triangular cam. Fig. 6 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case of the coefficient (4). ° Fig. 7 shows the line diagram of the positional displacement and velocity displacement of the generated cam in the case of the coefficient k=0.866 in the triangle cam. Fig. 8 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case where the coefficient k = 0.9. Fig. 9 is a line diagram showing the positional displacement and the speed displacement occurring in a certain direction of the triangular cam in the case of a coefficient of 1.0. Fig. 10 is a view showing the configuration of a cam mechanism of a second embodiment as seen from the face side of the integrated transfer sewing machine.

Fig. 11 is a view showing the configuration of a cam mechanism of a third embodiment as seen from the face side of the integrated transfer sewing machine. Fig. 12 is a view showing the configuration of a cam mechanism of a fourth embodiment as seen from the face side of the integrated transfer sewing machine. Fig. 13 is a line diagram showing the positional displacement and the speed displacement generated by the cam mechanism of the fourth embodiment in a certain direction. Figure 14 is a line diagram of positional displacement and velocity displacement produced by a conventional cam mechanism in a certain direction. [Main component symbol description] 10...Integrated transfer sewing machine (up and down transfer 18...lower axis sewing machine) 11...needle bar 12.. .Upper feed foot 13.. .About cloth foot 14".Transfer tooth 16.. [Upper car rotation axis] 19... Transfer table 20, 21. _· Support bar 40... Upper side forward and backward transfer mechanism 41... Needle bar oscillating table 42... Needle bar swing axis 43, 92... Output wrist 29 201016917 44, 95... Input wrist 76... Front and rear shift 45, 57, 59, 67B, 86, 96... Link body 80... Lower side up and down transfer mechanism 50... Upper side up and down transfer mechanism 81... Up and down moving cam 53... Up and down Transfer shaft 83...Up and down transfer shafts 54,74,84...Transfer wrist 85...Up and down transfer wrist 55...Up and down transfer wrist 90...Transfer adjustment mechanism 56,560^563⁄4)...Link point 91...Transfer Adjusting motor 60, 60 people 6 (©, 600... Cam mechanism 93... Square wire spool 61, 61C. · Triangle cam 94... Angle adjustment body 62, 62 people 62 (:, 82... move up and down Rod (convex C··· center point wheel follower) D... position displacement 63, 63A... rod portion P... perpendicular line 64, 64A··· engaging portion S". rotation center 65, 65A, 65C, 66, 66A, 66C, 67, 67C, U... bottom edge 68, 68C... cam receiving surface V... speed Degree displacement 69... Segment screw 70... Lower side forward and backward transfer mechanism 71... Front and rear moving cam 72··· Front and rear moving lever 73... Forward and backward transfer shaft 75... Arm crank 30

Claims (1)

201016917 VII. Patent application scope: h A kind of rib machine for loading and unloading, paving (4) the joint of the feeding tooth and the upper feeding foot to carry out the feeding of the material to be sewn, which has: Transfer the tooth, cut the money board from the τ side _ After the product is processed, the transfer operation is performed; the upper feed leg 'joins the sewn object on the needle plate from above and then transfers; the lower front and rear material feed mechanism moves the transfer tooth back and forth along the transfer direction; The mechanism 'following the transfer tooth in the up and down direction; the upper side forward and backward transfer mechanism is configured to move back and forth along the transfer direction; and the upper side up and down transfer mechanism is provided to the upper feed leg in the up and down direction The sewing machine that moves up and down is characterized in that: the upper side vertical transfer mechanism includes a cam mechanism that takes a reciprocating motion from a rotation operation of a rotationally-driven rotary shaft; and the cam mechanism has an equilateral triangle The three vertices are respectively triangular cams of peripheral shapes in which the arcs of the two sizes of the center are connected, and at least one a cam follower that faces the receiving surface opposite to each other with the triangular cam interposed therebetween; the two-corner cam can be lowered from any point of the apex toward the bottom line and is more positive The manner in which the center point of the triangle is rotated about the position on the bottom side is fixedly supported by the aforementioned rotation 31 201016917 When the needle of the sewing machine is moved up and down by the upper τ movement, the above-mentioned upper feeding foot is placed in the manner of the top dead center in front of the up and down direction. In 2.: Shen Qing Patent Patent IIW item is transferred to the sewing machine. The front: the needle bar is at the top dead center. 'The bottom edge is oriented vertically or horizontally. If it is moved above the _ item of the patent application scope In the case of the slit machine, when the length of one side of the regular triangle is 丄, the distance from the apex to the center of rotation of the two-corner cam is 07 or more and 10 or less. 4. The sewing machine as described above in the third paragraph of the patent application, wherein the position of the aforementioned center of rotation is the intersection of the aforementioned vertical line with the aforementioned bottom side. 5. A sewing machine that moves up and down to perform the feeding of the object to be sewn by a joint operation of the transfer tooth and the upper feed leg, and includes: transferring the tooth, and joining the sewn object on the needle plate from below The transfer operation is performed; the upper feed leg is joined to the sewn object on the needle plate from above, and the transfer operation is performed; the lower front and rear transfer mechanism is configured to move back and forth along the transfer direction; the lower side up and down transfer mechanism is along The upper and lower transfer mechanisms are moved back and forth in the up and down direction, and the upper and lower transfer mechanisms are moved back and forth along the transfer direction of the upper feed 32 and the upper feed 32; and the upper and lower transfer mechanisms are provided to the upper and lower directions. The first τ transfer slit _ is characterized in that: the upper side up and down transfer mechanism is provided with: a cam mechanism that takes a reciprocating action from the rotation of the rotation: the rotation of the shaft; The three vertices of an equilateral triangle a cam, which is connected to a triangular periphery of a peripheral shape having at least an arc connected to the cam follower of the above-mentioned triangular convex (four) mode and the outer_mouth_opposite facing surface; the triangular cam's are vertices The method of the point-centered approach is fixedly read on the aforementioned rotating shaft; the person in the position: the rim-moving body' is subjected to the combined displacement of the displacement of the receiving faces of the two groups to perform the back and forth movement; When the movement is performed and the needle is moved to the top dead center where the needle is moved up and down, the front side and the upper and lower sides are moved back and forth along the upper and lower sides of the rotation axis. "月'] The two-corner cam is fixedly selected. 6. =Τ下～下移送_机, where, from the narration of the two-corner cam Dan, from the bottom edge of the equilateral triangle, the apex of the front ^ center The farthest distance from the front; *, when the needle bar is at the top dead center, the needle bar of the cam follower is at the top dead center when facing the vertical point, and the pair receiving face of the line is inclined 40 to 50. The scope. The back-and-forth movement of the cam follower is as described in the patent application 5th, the upper and lower transfer seams, wherein 33 201016917 the two cams of the aforementioned cam follower are parallel to each other, the cam follower The direction of movement back and forth is inclined by 45°. 34