JP2006305087A - Puller device for sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably operate a sewing machine at high speed. <P>SOLUTION: A puller device 100 is provided with: clutch sleeves 53a and 53b having a built-in one-way clutch; and a spacer member 54. Two first thrust plates 56a and 56b made of phosphor bronze are provided on respective end faces opposing each other of the clutch sleeve 53a and the spacer member 54, and one second thrust plate 57 consisting of steel material is provided between the two first thrust plates 56a and 56b. The respective first thrust plates 56a and 56b are engaged with the respective end faces opposing each other of the clutch sleeve 53a and the spacer member 54 to be turnable integrally in the direction of periphery of an axis. An oil feeding path 55 is formed at the clutch sleeve 53a, and through-holes are formed at the respective first thrust plates 56a and 56b and the second thrust plate 57. Guiding grooves A, B and C for guiding grease are formed at the end face of the second thrust plate 57 to supply the grease from the oil feeding path 55. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a puller device for a sewing machine.

  In a sewing machine puller device that applies a pulling force toward a downstream side in the cloth feeding direction to a sewing object such as a cloth, the sewing machine is arranged so as to face the sewing position in the cloth feeding direction, that is, downstream of the needle drop position. Further, when at least one of the upper roller and the lower roller is rotated as a drive wheel, the cloth sandwiched between the gaps between them is sequentially conveyed to the downstream side. The sewing machine includes an upper roller having a built-in clutch mechanism that converts the swinging motion of the arm obtained from the main shaft rotated by the sewing machine motor via the cam mechanism or the link mechanism into intermittent rotational motion in one direction. A puller device is known (for example, refer to Patent Document 1).

  The upper roller of such a puller device of the sewing machine has a cylindrical roller portion, and is disposed inside the roller portion at a substantially central portion in the axial direction of the roller portion and can rotate integrally with the roller portion. A clutch spacer fixed to is provided. In addition, clutch sleeves containing the above-described clutch mechanism (one-way clutch) are respectively disposed on both sides of the clutch spacer in the axial direction of the rotation axis of the clutch spacer, and one clutch sleeve is provided with the above-described vibration. It is connected to an arm that performs dynamic motion.

When the above-mentioned arm is swung in accordance with the driving of the sewing machine motor, the above-described clutch sleeve is rotated, and the clutch shaft that has obtained a one-way rotational movement via the one-way clutch built in the clutch sleeve is provided. The cloth is conveyed by rotating intermittently and intermittently rotating the clutch spacer and the roller connected to the clutch shaft.
JP 2001-353388 A

By the way, with the recent increase in the speed of the sewing machine operation, the inertia force of the clutch sleeve is reduced by forming the rotating clutch sleeve from an aluminum-based material.
However, in the conventional sewing machine puller device disclosed in Patent Document 1, the sliding portion between the clutch sleeve rotating inside the roller portion and the clutch spacer rotating integrally with the roller portion is provided. A thrust plate with good slidability for reducing the friction is provided, but the contact surface between the thrust plate and the clutch sleeve is also configured to allow sliding. For this reason, when the high-speed operation is stopped, the thrust plate and the clutch spacer slide on the contact surface, and heat and wear are generated on the contact surface on the clutch sleeve side made of an aluminum-based material having low wear resistance. There is a problem that the stability of the sewing machine operation and the durability of the apparatus cannot be ensured.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a sewing machine puller device that enables stable high speed operation of the sewing machine.

  In order to solve the above-described problems, the invention according to claim 1 is a sewing machine puller device that applies a pulling force downstream of the sewing position in the cloth feeding direction to the downstream side in the cloth feeding direction. A clutch sleeve containing a roller in contact with the workpiece, a clutch sleeve which is provided with a rotational driving force and converts the rotational driving force into a rotational motion in one direction and transmits the rotational driving force, and adjacent to the clutch sleeve And a second spacer member disposed to face each of the opposing end surfaces of the clutch sleeve and the spacer member, and a spacer member for transmitting the one-way rotational motion transmitted by the one-way clutch to the roller. A first thrust plate and a second thrust plate disposed between the two first thrust plates, each of the first thrust plates having a surface The clutch sleeve or the spacer member is provided so as to be rotatable integrally with the clutch sleeve or the spacer member, and a lubricant is supplied to the clutch sleeve or the spacer member between the first thrust plate and the second thrust plate from the outside. A puller device for a sewing machine, wherein an oil supply path (groove) is formed.

  According to a second aspect of the present invention, in the sewing machine puller device according to the first aspect, at least the opposing surfaces of the two first thrust plates and the second thrust plate are opposed to each other. One surface has a grease diffusion guide groove formed along the radial direction thereof.

  According to a third aspect of the present invention, in the sewing machine puller device according to the first or second aspect, the first thrust plate facing the oil supply path of the grease has a through-hole that passes the grease to the front and back. Is formed.

  According to the invention described in claim 1, between the first thrust plate and the second thrust plate, through the oil supply path formed in the clutch sleeve, the first thrust plate and the second thrust plate, Lubricant is supplied from the outside. Thereby, both surfaces of the 2nd thrust board arrange | positioned between the 1st thrust board which covers the end surface of a clutch sleeve, and the thrust board which covers the end surface of the spacer member which faces this can be lubricated. Therefore, the sliding surfaces of the first thrust plate and the second thrust plate can be protected and the cooling effect can be obtained, wear and heat generation can be prevented, and stable high speed operation of the sewing machine can be performed.

  According to the second aspect of the present invention, the same effect as that of the first aspect of the invention can be obtained, and in particular, the opposing surfaces of the two first thrust plates and the second thrust plate can be obtained. Among them, on at least one surface facing each other, the grease can be guided and spread in a range extending from the inner periphery to the outer periphery of each thrust plate by the guide groove for grease diffusion formed along the radial direction.

  According to the third aspect of the invention, the same effect as that of the first or second aspect of the invention can be obtained, and in particular, the first thrust plate facing the oil supply path of the grease A through hole is formed, and the grease supplied from one end face side, that is, the oil supply path side, can be guided to the other end face side. Can be lubricated. Accordingly, friction can be reduced, heat generation and wear can be prevented, and a stable sewing operation and high speed operation of the sewing machine can be realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The puller device 100 for a sewing machine according to the present embodiment is provided as a transport mechanism that applies a pulling force toward the downstream side in the feed direction to the workpiece on the downstream side of the sewing position in the cloth feed direction. In this embodiment, the direction in which the sewing needle 8 moves up and down is the Z-axis direction (up-down direction), and one direction (feeding direction of the workpiece) orthogonal to this is the X-axis direction (front-rear direction), X A direction orthogonal to both the axial direction and the Z-axis direction will be described as the Y-axis direction (left-right direction). In this embodiment, the cloth to be sewn is conveyed in the X-axis direction, that is, in the direction of arrow D in FIG. 1, and the far side in FIG. 1 is the upstream side, and the near side is the downstream side. It has become.

(Overall configuration of the embodiment)
FIG. 1 is a perspective view showing an overall configuration of a puller device 100 of a sewing machine 1 according to this embodiment.
As shown in FIG. 1, a puller device 100 of the sewing machine 1 (hereinafter referred to as a puller device 100) is attached to an arm portion 5 of the sewing machine 1, and includes a lower roller 40 that comes into contact with a sewing object from below and an upper side. The main part is comprised including the upper roller 50 which contacts a to-be-sewn material, and the upper roller drive mechanism 10 which transmits rotational drive force to the upper roller 50.

(Body frame)
The main body frame 2 is disposed in parallel with the XY plane and includes a bed portion 3 including a needle plate 9 on the upper surface of one end portion, and a vertical trunk portion 4 erected from the other end side of the bed portion 3. The arm portion 5 is provided so as to extend in the same direction as the bed portion 3 from the upper end of the vertical body portion 4, and is formed in a substantially U shape as a whole.
A needle drive mechanism (not shown) is built in the tip of the arm unit 5. The needle drive mechanism is provided with a needle bar 7, and the needle bar 7 projects downward from the tip of the arm portion 5. A sewing needle 8 is supported at the lower end of the needle bar 7. The needle bar 7 is reciprocated in the vertical direction, that is, the Z-axis direction by the needle drive mechanism, so that the sewing needle 8 drops the needle into the needle hole formed in the needle plate 9 of the bed portion 3. It is like that.

(Lower roller)
The lower roller 40 is disposed at one end of the bed portion 3 at a position where the upper end of the peripheral surface thereof faces the lower end of the peripheral surface of the upper roller 50 described later (see FIG. 1).
The lower roller 40 is rotatably supported by the bed portion 3 via a lower roller shaft along the Y-axis direction (see FIGS. 1 and 5). That is, the lower roller is provided as a driven wheel that is rotated by coming into contact with the workpiece to be conveyed conveyed in the gap between the lower roller and the upper roller 50 (described later) as a driving wheel. The lower roller 40 is formed so that the width in the Y-axis direction is substantially equal to that of the upper roller 50.

(Upper roller drive mechanism)
As shown in FIG. 1, the upper roller driving mechanism 10 is disposed from the side surface of the arm portion 5 on the downstream side of the needle drop position described above to the lower side of the tip of the arm portion 5. The upper roller driving mechanism 10 is provided as a transmission mechanism that obtains a driving force from an upper shaft (main shaft) (not shown) that is rotationally driven by a sewing motor (not shown) and transmits a feeding operation to the upper roller 50.
That is, the upper roller drive mechanism 10 is connected to one end (upper end) of the feed lever 19 from the upper shaft extending in the longitudinal direction inside the arm portion 5, that is, the Y-axis direction, via an eccentric cam, a link, and the like. A reciprocating rocking motion is imparted. An upper roller shaft (clutch shaft) 51 that is a rotation shaft of the upper roller 50 described later is connected to the other end (lower end) side of the feed lever 19.

(Upper roller)
The upper roller 50 is disposed on the downstream side of the needle drop position described above, and its axis is parallel to the Y-axis direction, that is, orthogonal to the transport direction, and the lower end of the peripheral surface is the upper surface of the bed portion 3. It is arrange | positioned so that it may become substantially the same height. As shown in FIG. 1, the upper roller 50 is suspended by the support mechanism 20 below the front end of the arm portion 5.
The support mechanism 20 is provided from the tip side surface portion of the arm portion 5 on the downstream side of the needle drop position described above to the lower side, and is fixed to the tip side surface portion of the arm portion 5. It has. Guide holes 21a (the other is not shown) are formed above and below the guide member 21, and a shaft 22 is inserted into these guide holes 21a so as to be slidable in the axial direction (vertical direction). A portal frame 23 is fixedly supported at the lower end of the shaft 22. The arms extend from both ends in the Y-axis direction of the portal frame 23 toward the lower side, and an upper roller shaft 51 that supports the upper roller 50 is supported on the lower end side of each arm. A one-way clutch is connected to the upper roller shaft 51, and the upper roller 50 can be intermittently rotated only in one direction in response to the reciprocating rotation operation by the upper roller driving mechanism 10 described above. . Thereby, the upper roller 50 in the present embodiment is in a state where the sewing needle 8 that is driven up and down by rotation of a sewing machine motor (not shown) is positioned below the vertical movement, that is, the sewing needle 8 is stuck in the sewing product. In this case, the conveying operation is not performed, and the conveying operation is performed when the sewing needle 8 is positioned above the vertical movement, that is, when the sewing needle 8 is detached from the sewing product, and acts on the sewing needle 8. Can be reduced.
In addition, a shaft holder 26 is fixedly installed in an intermediate portion of the shaft 22, and a coil spring 27 is interposed in an intermediate portion of the shaft 22 extending from the upper surface of the shaft holder 26 to the guide member 21. The coil spring 27 is mounted in a compressed state rather than the natural length, and the portal frame 23 and the upper roller 50 are always directed toward the lower side, that is, the above-described lower roller 40 side via the shaft holder 26 and the shaft 22. It has come to be energized.
The upper roller 50 is in a state in which the lower end of the peripheral surface of the upper roller 50 is separated from the upper surface height of the bed portion 3 by the operation lever 28 connected to the shaft 22 via a link mechanism or a cam mechanism. A certain upper position and a lower position where the lower end of the peripheral surface of the upper roller 50 is in a state where it can be brought into contact with the height of the bed portion 3, that is, the peripheral surface of the lower roller 40 described later with a biasing force, It can be held in the vertical position.

Here, the internal configuration of the upper roller 50 in the present embodiment will be described in more detail.
As shown in FIGS. 2 and 3, the upper roller 50 in the present embodiment is given a reciprocating rotational driving force to the upper roller body 52 in contact with the workpiece from the upper side, and this rotational driving force. As described above, the one-way rotational motion transmitted by the one-way clutch is located between the clutch sleeves 53a and 53b having the built-in one-way clutch that converts the rotational motion into the one-way rotational motion and the clutch sleeves 53a and 53b. And a spacer member 54 that transmits to the upper roller body 52.
The clutch sleeve 53a, the spacer member 54, and the clutch sleeve 53b are members formed in a cylindrical shape having substantially the same outer diameter, and are arranged in the above order in the order closer to the feed lever 19 described above.

  And the two 1st thrust board 56a, 56b which consists of phosphor bronze arrange | positioned facing each end surface is provided in the end surface which the clutch sleeve 53a and the spacer member 54 in this embodiment oppose, One second thrust plate 57 made of steel is provided between the two first thrust plates 56a and 56b. Also, a first thrust plate 56c made of phosphor bronze is provided between the spacer member 54 and the clutch sleeve 53b. These thrust plates 56a, 56b, 56c, and 57 are both thin disk-like (annular) members having substantially the same outer shape as the above-described clutch sleeve 53a and the like, and having a through hole at the center.

The upper roller 50 includes an upper roller shaft 51 that penetrates all of the clutch sleeves 53a and 53b, the spacer member 54, the thrust plates 56a, 56b, and 56c, and the thrust plate 57.
The upper roller shaft 51 is fixedly equipped with an E-ring for restricting the thrust direction. Further, the other end (the left side in FIG. 2) of the upper roller shaft 51 is engaged with a lower portion of the feed lever 19 and a clutch spring 58 described later by bolting.
That is, the clutch sleeves 53a, 53b, the spacer member 54, the thrust plates 56a, 56b, 56c, and the thrust plate 57 are connected to each other via the upper roller shaft 51, and are provided so as to be adjustable by tightening the bolts. The clutch springs 58 are pressed against each other by the urging force of the clutch springs 58. As a result, the clutch sleeves 53a, 53b, the spacer member 54, the thrust plates 56a, 56b, 56c, and the thrust plate 57 are brought into contact with each other while their end surfaces are pressed against each other (see FIG. 5). .)

The clutch sleeve 53a is a substantially cylindrical member having a rotation axis along the Y-axis direction, and one end surface thereof is coupled to the lower end of the feed lever 19 of the upper roller drive mechanism 10 described above. Further, a notch 60a for locking the first thrust plate 56a is formed in a part of the outer edge of the other end surface of the clutch sleeve 53a.
An oil supply port 55a for injecting (supplying) grease as a lubricant is provided on the peripheral surface of the clutch sleeve 53a and in the vicinity of the end portion on the feed lever 19 side, and the other end surface, that is, the feed lever. A discharge port 55 b is formed on the end surface on the opposite side to 19. That is, an oil supply path 55 that leads from the oil supply port 55b to the end surface on the spacer member 54 side is formed inside the clutch sleeve 53a. The discharge port 55b is provided at a distance of radius R from the center of the clutch sleeve 53a.
The oil supply port 55a is located outside the upper roller body 52 when the upper roller body 52 is mounted, and is not covered by the upper roller body 52 (see FIG. 5).
The inner peripheral portion of the clutch sleeve 53a can be rotated only in a predetermined direction, that is, in the direction of arrow II shown in FIG. 2, by the above-described one-way clutch. The upper roller shaft 51 described above is inserted into the inner peripheral portion of the clutch sleeve 53a so as to be rotatable together with the inner peripheral portion.
One end surface of the first thrust plate 56a is in contact with the end surface of the clutch sleeve 53a on the discharge port 55b side.

  The first thrust plate 56a is provided with a convex engaging portion 70a formed by cutting a part of the outer periphery thereof and bending the clutch sleeve 53a, and the engaging portion 70a is the above-described clutch sleeve 53a. Is engaged with the notch 60a. As a result, the thrust plate 56a can rotate integrally with the clutch sleeve 53a when moving in the direction around the axis. Further, a through hole 80 is formed at a position of the first thrust plate 56a corresponding to the above-described discharge port 55a at a radius R having substantially the same diameter as the discharge port 55b. One end surface of the second thrust plate 57 is in contact with the other end surface of the first thrust plate 56a.

The second thrust plate 57 is formed of a steel material, and the surface is subjected to surface treatment or heat treatment. On the end surface of the second thrust plate 57 on the clutch sleeve 53a side, as shown in FIG. 4A, four guide grooves A are substantially perpendicular to each other from the center to the outer periphery, that is, along the radial direction. Formed in position. A substantially circular guide groove B having a radius R is formed on the end face. The guide grooves A and the guide grooves B intersect each other, and there are four through holes that pass through the second thrust plate 57 at positions on the guide grooves B and between the guide grooves A described above. 81 is drilled.
Further, as shown in FIG. 4B, the other end surface of the second thrust plate 57, that is, the end surface on the spacer member 54 side, passes through the through hole 81 and extends from the central portion to the outer peripheral portion (circumferential portion). Four guide grooves C are formed radially along the radial direction.
That is, supply (injection) from the outside (the oil supply port 55a) by passing through the oil supply path 55, the through hole 80 of the first thrust plate 56a, the through hole 81 of the second thrust plate 57, and the guide grooves A, B, C. The lubricant such as grease is guided to the entire end faces on both sides of the second thrust plate 57 made of steel.
One end surface of the first thrust plate 56 b is in contact with the other end surface of the second thrust plate 57. The first thrust plate 56b is formed with one through hole 82 at a position of a radius R corresponding to the through holes 80 and 81, like the first thrust plate 56a and the second 57. Further, a cut portion is formed in a part of the outer edge of the first thrust plate 56b, and the cut portion is an engaging portion 70b bent to the spacer member 54 side.

The spacer member 54 is fixedly equipped with an upper roller body 52 on the outer periphery thereof by a connecting method such as press fitting or baking. Also, bolt holes are provided from the outer periphery to the inner periphery of the spacer member 54, and the spacer member 54 and the upper roller shaft 51 are fixed by bolts, and when moving in the direction around the shaft, the upper roller body 52 and the spacer member 54 are provided. And the upper roller shaft 51 can rotate integrally. Further, the first thrust plate 56b is located at the outer edge of the one end surface of the spacer member 54 on the feed lever 19 side and corresponding to the engaging portion 70b of the first thrust plate 56b provided adjacent to the spacer member 54. A notch 60b is formed to latch the. When the engaging portion 70b is engaged with the cutout portion 60b, the first thrust plate 56b and the spacer member 54 are integrally rotatable when moving in the direction around the axis. The first thrust plate 56 c is in contact with the other end surface of the spacer member 54.
An engaging portion 70c is formed at the outer edge of the first thrust plate 56c. The engaging portion 70c is formed by bending the cut portion toward the clutch sleeve 53b. The engaging portion 70c corresponds to a position corresponding to one end surface of the clutch sleeve 53b. Is engaged with a notch 60c formed in The first thrust plate 56c is provided with a through hole 83 at a radius R.

Then, the other end side of the upper roller shaft 51 is inserted into the center hole of the clutch sleeve 53b so as to be integrally rotatable. That is, the inner peripheral portion of the clutch sleeve 53b can be rotated only in the direction of the arrow II shown in FIG. 2 by the one-way clutch.
As a result, the clutch sleeves 53a and 53b are both restricted to rotate in the same direction via the upper roller shaft 51, that is, in one direction with respect to the direction of the arrow II shown in FIG.
An oil supply port 65a for injecting grease as a lubricant is provided on the circumferential surface of the clutch sleeve 53b and in the vicinity of the other end surface of the clutch sleeve 53b, as in the clutch sleeve 53a described above. A discharge port 65b is formed on one end surface of the clutch sleeve 53b. That is, the clutch sleeve 53b is formed with an oil supply path 65 leading from the oil supply port 65a to the end surface on the spacer member 54 side.

  Each of the first thrust plates 56a, 56b, 56c and the second thrust plate 57 is a combination of phosphor bronze and a steel material, and is a combination of materials having wear resistance in sliding with each other.

Next, the operation of the sewing machine puller device 100 according to the present embodiment will be described in detail with reference to the drawings.
First, before starting the sewing operation, both the upper roller 50 and the lower roller 40 are stopped, and the upper roller 50 is held at the lower position by the support mechanism 20.
At the start of sewing, a cloth as a sewing object is fed onto the bed 3 by a known cloth feed mechanism (not shown), and the leading edge of the cloth is held between the upper roller 50 and the lower roller 40.
Here, operation | movement of the upper roller 50 in this embodiment is demonstrated in detail with reference to FIG. 2, FIG.

The first thrust plate 56a is engaged with the end surface of the clutch sleeve 53a via the engaging portion 70a, and the through hole 80 matches the position of the discharge port 55b. Further, the first thrust plate 56b positioned on the opposite side of the clutch sleeve 53a via the second thrust plate 57 and the end surface of the spacer member 54 (end surface on the clutch sleeve 53a side) are engaged via the engaging portion 70b. Thus, it can rotate integrally with respect to the direction around the axis.
Further, the first thrust plate 56c disposed between the spacer member 54 and the clutch sleeve 53b is engaged with the clutch sleeve 53b via the engaging portion 70c and can be rotated integrally during movement around the axis. It becomes.

Next, with the start of the sewing machine operation, the sewing machine motor is driven, and the upper roller driving mechanism 10 gives the feed lever 19 a reciprocating rocking motion about the upper roller shaft 51. Accordingly, the clutch sleeve 53a connected to the lower end of the feed lever 19 is given a reciprocating rotation operation around the upper roller shaft 51.
Since the clutch sleeves 53a and 53b incorporate a one-way clutch that converts the reciprocating rotation into one direction, that is, the rotation in the direction of the arrow II in FIG. 2 in this embodiment, when the clutch sleeve 53a is rotated, The roller shaft 51 is intermittently rotated in the direction of arrow II.
Thereby, the spacer member 54 and the upper roller body 52 fixed to the upper roller shaft 51 with the bolts are intermittently rotated in the direction of the arrow II. As a result, the cloth sandwiched between the upper roller 50 and the lower roller 40 is conveyed downstream in the arrow D direction, that is, the conveying direction.

The first thrust plate 56a engaged with the end face of the clutch sleeve 53a reciprocates together with the clutch sleeve 53a. Therefore, sliding occurs between the first thrust plates 56 a and 56 b that are in contact with both sides of the second thrust plate 57 and both surfaces of the thrust plate 57.
Since the second thrust plate 57 is rotatably mounted on the upper roller shaft 51, the second thrust plate 57 is gradually rotated in the arrow D direction.
Here, each of the first thrust plates 56a and 56b and the second thrust plate 57 is formed of phosphor bronze and a steel material that has been subjected to surface treatment or heat treatment, and thus has excellent slidability. Since the frictional resistance at the time of movement is low, smooth sliding operation is performed on the sliding surfaces of each other.
Further, the end surface of the clutch sleeve 53a and the end surface of the spacer member 54 are covered with the first thrust plates 56a and 56b, respectively, and each first thrust plate 56a and 56b functions as a protection member against sliding. It becomes. For this reason, generation of friction, heat generation, and wear due to sliding of the end surface of the clutch sleeve 53a and the end surface of the spacer member 54 on each end surface are prevented.

Next, the oil supply operation to the upper roller 50 in this embodiment will be described.
First, before starting sewing, grease as a lubricant is injected into the oil filler ports 55a and 65a provided in the clutch sleeves 53a and 53b, and the lid is closed.
The grease injected from the oil supply port 55a passes through the oil supply path 55, is discharged from the discharge port 55b, and passes through the through hole 80 of the first thrust plate 56a facing the discharge port 55b.
Since the rotational position of the second thrust plate 57 changes as the sewing machine 1 is driven, the grease discharged from the discharge port 55b is moved along the guide groove B provided on the surface of the thrust plate 57 to the second thrust plate. Guided in the circumferential direction on one side of the plate 57. Further, the grease guided in the circumferential direction of one surface of the second thrust plate 57 passes through the through hole 81 and is guided to the end surface on the first thrust plate 56b side, and further guides the guide groove A along the guide groove B. Thus, the second thrust plate 57 is guided in the radial direction on one side. Thereby, grease spreads over the whole of one end surface of the second thrust plate 57 facing the first thrust plate 56a. The grease that has passed through the through-hole 81 of the second thrust plate 57 is guided to the guide groove C and guided in the radial direction on the other one surface of the second thrust plate 57. As a result, the grease spreads over the entire end surface of the thrust plate 57 facing the first thrust plate 56b.
In addition, the grease injected from the oil supply port 65 a passes through the oil supply path 65, is discharged from the discharge port 65 b, and passes through the through hole 83. The grease that has passed through the through hole 83 is supplied to the entire contact surface on which the first thrust plate 56c and the spacer member 54 are in contact.

As described above, according to the puller device 100 of the sewing machine according to the present embodiment, when the sewing machine 1 is driven, the spacer member 54 and the clutch sleeve 53a and the first thrust plates 56a and 56b that are in contact with the spacer member 54 and the clutch sleeve 53a, respectively. It can be rotated / rotated integrally, and direct sliding can be prevented from occurring on the opposing end surfaces of the spacer member 54 and the clutch sleeve 53a. Thereby, the heat_generation | fever and abrasion which arise between the spacer member 54 and the clutch sleeve 53a, and each 1st thrust board 56a, 56b can be prevented.
Further, by adopting a configuration in which the spacer member 54 or the clutch sleeves 53a and 53b are not easily worn, the durability of the sewing machine 1 can be improved, and the spacer member 54 or the clutch sleeve 53a can be considered without considering wear resistance. 53b can be selected, and the inertia force can be greatly reduced by forming the spacer member 54 or the clutch sleeves 53a, 53b from a light material such as aluminum. Therefore, the overrun of the puller device 100 can be prevented when the sewing machine 1 is stopped from high speed operation, and stable sewing operation and stable high speed operation of the sewing machine 1 can be realized.
On the other hand, since each first thrust plate 56 has a plate shape, the influence on the weight of the upper roller 50 is small, and therefore, each first thrust plate 56 can be selected from materials considering wear resistance. It becomes.
In addition, each of the first thrust plates 56a and 56b and the second thrust plate 57 is formed of a combination of materials having wear resistance, and therefore has low frictional resistance and excellent slidability. The load at the time of operation | movement of the 1 puller apparatus 100 can be reduced. Further, the durability of the sewing machine 1 can be further improved, and a stable sewing operation and a stable high-speed operation can be realized.
Moreover, since the sliding surface of the 1st thrust board 56 and the 2nd thrust board 57 becomes a combination of phosphor bronze and steel materials, favorable slidability can be ensured. Further, since the surface of the steel material is subjected to surface treatment or heat treatment, the wear resistance of the steel material surface can be further improved, and the durability of the puller device 100 of the sewing machine 1 can be further improved. .

Further, it is possible to supply grease as a lubricant from the outside between the first thrust plates 56 a and 56 b and the second thrust plate 57 via the oil supply path 55 and the through holes 80 and 81. Thereby, grease can be guide | induced to the both end surfaces of the 2nd thrust board 57 arrange | positioned between each 1st thrust board 56a, 56b. Accordingly, the sliding surfaces of the first thrust plate 56 and the second thrust plate 57 can be protected and the cooling effect can be obtained, and wear and heat generation can be prevented. As a result, stable high speed operation of the sewing machine 1 can be achieved. Can be done.
Further, on the respective opposing surfaces of the first thrust plates 56a, 56b and the second thrust plate 57, the first thrust plates 56a are formed by the guide grooves A, C for grease diffusion formed along the radial direction. 56b, the grease is guided to the range from the inner periphery to the outer periphery of the second thrust plate 57, so that the grease can be spread over almost the entire end face.
Further, a through hole 80 is formed in the first thrust plate 56a, and the grease supplied from one end face side, that is, the oil supply path 55 side can be guided to the other end face side. Therefore, even if it is oil supply from one side, both surfaces of each 1st thrust board 56a, 56b and the 2nd thrust board 57 can fully be lubricated. As a result, friction during sliding between the first thrust plates 56a and 56b and the second thrust plate 57 can be reduced, and heat generation and wear between the first thrust plates 56a and 56b and the second thrust plate 57 can be achieved. Can be prevented, and a stable sewing operation and high-speed operation of the sewing machine can be realized.

In the present embodiment, the reciprocating power is applied by the feed lever 19 based on empirical rules under the usage conditions of the conventional sewing machine puller device. Two thrust plates 56a and 56b made of phosphor bronze are provided between the two thrust plates 56 and 56, and one thrust plate 57 made of steel is provided between the two thrust plates 56 and 56. Also in the gap between the clutch sleeve 53b, the two first thrust plates 56, 56 made of phosphor bronze, and the second thrust plate 57 made of steel material between the two thrust plates 56, 56 are provided. It is good also as a structure to provide.
In the present embodiment, a single thrust plate 57 made of steel is sandwiched between the two first thrust plates 56 made of phosphor bronze, but the order of arrangement is not necessarily limited thereto. It is not something. That is, one of the first thrust plate and the second thrust plate is formed of phosphor bronze, and the other is formed of a steel material that has been subjected to surface processing by hard chromium or an ion nitride film. Preferably, for example, a single thrust plate 56 made of phosphor bronze may be sandwiched between two thrust plates 57 made of steel.
Further, since the surface of the steel material is subjected to surface processing with hard chromium or an ion nitride film, the wear resistance of the surface of the second thrust plate 57 can be further improved, and the puller device of the sewing machine 1 The durability of 100 can be further improved.
Further, the guide grooves A, B, and C formed in the thrust plate 57 are not limited to the shapes shown in FIGS. 4A and 4B, and lubrication such as grease supplied from one end face side. Any shape may be used as long as the agent can be spread over substantially the entire area of the end faces on both sides by rotation. That is, for example, a straight line that does not follow the radial direction from the center to the outer periphery may be formed, or a curved line may be formed.
Further, the number of through holes 81 formed in the second thrust plate 57 is not limited to four, and may be one to three, or five or more.
Further, each of the engaging portions 70 is not limited to one place for each first thrust plate 56. For example, each first thrust plate 56 is formed with two or more engaging portions. Alternatively, the end surfaces of the clutch sleeves 53a and 53b and the spacer member 54 facing the first thrust plates 56 may be formed at positions corresponding to at least the engaging portions 70.
Further, the method of engagement is not limited to the notch, and may be, for example, a screw, pinning, adhesion, or the like, as long as each first thrust plate 56 can be fixed to the end surface.
Further, in the present embodiment, a configuration in which the upper roller 50 is a driving wheel and the lower roller 40 is a driven wheel is described, but the present invention can also be applied when the lower roller 40 is a driving wheel. In addition, both the upper roller 50 and the lower roller 40 may be drive wheels.

1 is a perspective view showing an overall configuration of a sewing machine puller device 100 according to the present invention. It is a disassembled perspective view which shows the internal structure of the upper roller 50 in this embodiment. It is a disassembled perspective view which shows the internal structure of the upper roller 50 in this embodiment. It is a side view which shows the end surface shape of the (2nd) thrust board in this embodiment. It is an enlarged view which shows the upper roller 50 in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine 2 Main body frame 3 Bed part 4 Body part 5 Arm part 7 Needle bar 8 Sewing needle 9 Needle plate 10 Upper roller drive mechanism 15 Rod 17 Link 18 Pin 19 Feed lever 20 Support mechanism 21 Shaft holding member 21a Support hole 22 Shaft 23 Portal frame 26 Shaft shaft holder 27 Coil spring 28 Operation lever 40 Lower roller 50 Upper roller 51 Upper roller shaft 52 Upper roller body 53a, 53b Clutch sleeve 54 Spacer member 55, 65 Oil supply path 55a, 65a Oil supply port 55b, 65b Discharge port 56 First thrust plate (phosphor bronze)
57 Second thrust plate (steel)
58 Clutch tension springs 60a, 60b, 60c Notch portions 70a, 70b, 70c Engaging portions 80, 81, 82, 83 Through hole 100 Puller device A, B, C Guide groove
D Transport direction

Claims (3)

In a sewing machine puller device that applies a tensile force downstream of the sewing position in the cloth feeding direction to the downstream side of the cloth feeding direction with respect to the workpiece.
A roller in contact with the workpiece,
A clutch sleeve having a built-in one-way clutch to which a rotational driving force is applied and which converts the rotational driving force into a rotational motion in one direction,
A spacer member that is adjacent to the clutch sleeve and that transmits rotational movement in one direction transmitted by the one-way clutch to the roller;
Two first thrust plates disposed facing each of the opposing end surfaces of the clutch sleeve and the spacer member;
A second thrust plate disposed between the two first thrust plates,
Each of the first thrust plates is provided so as to be rotatable integrally with the clutch sleeve or the spacer member facing each other,
The clutch sleeve or the spacer member is provided with an oil supply path (groove) capable of supplying a lubricant between the first thrust plate and the second thrust plate from the outside. Puller device.   A guide groove for grease diffusion is formed along the radial direction on at least one of the two opposing surfaces of the first thrust plate and the second thrust plate facing each other. The sewing machine puller device according to claim 1.   3. The sewing machine puller device according to claim 1, wherein the first thrust plate facing the grease supply path is formed with a through-hole passing through the front and back surfaces of the first thrust plate. 4.

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