JP2006271476A - Sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewing machine equipped with a thread retaining device that can prevent defects of moving a thread out of the way with a simple structure. <P>SOLUTION: A wiper device 20 of a sewing machine 100 is provided with a wiper 30 with biforked ends and moves forward and backward in a way that the vertical moving pathway of sewing needles 5a, 5b, 5c passes in between the biforked ends and a wiper driving mechanism 40 that serves as a wiper driving means for driving the wiper 30. A tilted needle thread guide 33a that leads a needle thread T inside a projected end 32b of a hook 32 installed on an extended section 31 of one end of the wiper 30 when the wiper 30 is moving forward is provided to an extension 33 of the other end of the wiper 30 to proactively draw the needle thread T on the track of the wiper 30 that serves as a needle thread capturing section moving backward to securely capture the needle thread T. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sewing machine, and more particularly, to a sewing machine including a needle thread holding device that holds a cut end portion of a needle thread.

Conventionally, in a decorative sewing machine having three sewing needles that are inserted through the needle threads and arranged in a direction perpendicular to the feed direction of the sewing product, after the thread trimming operation at the end of the sewing operation, There is known a sewing machine including a thread holding device that holds a cut end portion of a thread that is stretched between three sewing needles and a sewing object.
This thread holding device for a sewing machine is provided with a wiper having a bifurcated tip for facilitating the supplement of the yarn (see, for example, Patent Document 1).
The wiper of such a thread holding device for a sewing machine has two extending portions, and the needle thread that is stretched between the vicinity of the ends of the three sewing needles (specifically, the needle hole) and the article to be sewn. Is captured by the hook portion formed at the tip of the extending portion of the wiper that moves forward and backward along the direction in which the three sewing needles are lined up, so that the needle thread is paid and held during the backward movement. Yes.
Japanese Utility Model Publication No. 6-81483

However, in the conventional thread holding device for a sewing machine disclosed in Patent Document 1, a needle thread catching portion (hook portion) having an acute end with respect to the advancing / retreating direction of the wiper is provided at the tip of the wiper. However, depending on conditions such as the material of the needle thread and thread tension, if the needle thread is off the track of the hook part when the wiper is retracted, the needle thread cannot always be captured, resulting in poor thread wipe. There was a problem that could cause.
The tip of the wiper is bifurcated to make it easier to catch the needle thread when the wiper is moving forward, but it is not shaped to actively guide the needle thread onto the track of the hook part. There was a problem that the needle thread could not be captured.

  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 having a yarn holding device that can prevent defective thread wipe with a simple structure.

  In order to solve the above problems, the invention described in claim 1 includes a needle up-and-down moving means for driving the sewing needle up and down, a thread trimming means for cutting the needle thread below the needle plate of the sewing machine bed, Thread holding means for attracting and holding the cut end portion of the needle thread that is stretched between the sewing needle and the sewing product, and the thread holding means is formed with a bifurcated tip and the sewing needle A wiper that moves forward and backward so that the vertical movement path of the two moves between the two forks, and wiper driving means that drives the wiper, and the tip of one extension portion of the wiper formed in the forks Further, in the sewing machine having a hook-like needle thread catching portion that is folded back in the backward direction and protrudes toward the other extension portion of the wiper, the needle thread catching portion in the other extension portion When the wiper moves forward It is perforated, characterized in that the inclined needle thread guide portion for guiding the extending portion side of the one than the projecting end of Oite the needle thread to the needle thread catching portion is formed.

  According to a second aspect of the present invention, in the sewing machine according to the first aspect, the sewing machine has a plurality of sewing needles arranged side by side in the forward / backward movement direction of the wiper, and the wiper driving means is disposed at the foremost side. The wiper is advanced to a position where the end of the needle thread guide portion is placed in the front-rear direction with respect to the needle or is positioned forward of the frontmost needle.

  According to a third aspect of the present invention, in the sewing machine according to the first or second aspect, the end portion of the needle thread guide portion is formed in a curved shape.

  According to the first aspect of the present invention, when the wiper having the tip extended portion formed between the two ends is moved forward between the tip of the needle and the sewing product, the tip of the needle and the sewing product are The needle thread stretched between them is guided to one extending part side having the needle thread capturing part along the inclined needle thread guiding part formed on the other extending part. Thereby, the needle thread can be forcibly arranged on the track when the wiper moves backward, and the needle thread can be reliably captured when the wiper moves backward. Further, according to the present invention, the needle thread provided on the wiper has a simple structure in which the other extension part of the tip of the wiper formed on the fork is provided with an inclination for guiding the needle thread to the one extension part side. Yarn failure caused by the catching unit being unable to catch the needle thread can be extremely effectively prevented.

  According to the second aspect of the invention, the inclined needle thread guide portion provided at the extended portion of the tip of the wiper formed at the fork is aligned by the wiper driving means in the direction in which the wiper advances and retreats. Of the plurality of sewing needles provided, the sewing needle is pushed forward and moved forward to a position on the front side of the sewing needle disposed on the most front side in the moving direction of the wiper. As a result, all the needle threads stretched between the plurality of sewing needles arranged side by side in the advance / retreat direction of the wiper and the workpiece can be captured when the wiper moves backward. Therefore, with a simple structure, it is possible to reliably prevent defective thread wipe caused by the inability to capture the needle thread.

  According to the third aspect of the present invention, the needle thread is smoothly moved to the other extension part side by the inclined needle thread guide part in which the end part on the front side and the end part on the rear side are formed in a curved shape. Guided. Thereby, with a simple structure, the needle thread catching part cannot effectively catch the needle thread, and can effectively prevent the thread wiping failure.

Hereinafter, embodiments of a sewing machine according to the present invention will be described in detail with reference to the drawings.
<Configuration of sewing machine>
As shown in FIG. 1, the sewing machine 100 includes a sewing machine frame 1 as a sewing machine frame whose overall shape is substantially U-shaped. The sewing machine frame 1 includes a sewing machine bed portion 1 a located at a lower portion thereof, A sewing machine vertical body portion 1b erected upward from one end portion of the sewing machine bed portion 1a, and a sewing machine arm portion 1c extended from the upper end portion of the sewing machine vertical body portion 1b in the same direction as the sewing machine bed portion 1a. Yes. Further, the sewing machine 100 includes a sewing needle 5 including three sewing needles 5a, 5b, and 5c arranged in parallel in a forward / backward movement direction of the wiper 30 to be described later, and a cloth presser 7 that prevents the sewing product from being lifted. I have.
Further, the sewing machine 100 according to the present embodiment cuts the needle thread T below the needle up / down moving mechanism (not shown) as a needle up / down moving means for driving the sewing needle 5 up and down and the needle plate 2 of the sewing machine bed 1a. A thread trimming device (not shown) as a thread trimming means, and a wiper device 20 as a thread retaining means for attracting and holding the cut end portion of the needle thread T stretched between the sewing needle 5 and the sewing product. And.
Here, in the following description, the direction along the longitudinal direction of the sewing machine bed portion 1a of the sewing machine frame 1 is defined as the Y-axis direction, and the direction perpendicular to the Y-axis direction as the standing direction of the sewing machine longitudinal body portion 1b is defined as Z. The direction is the axial direction, and the direction orthogonal to both the Y-axis direction and the Z-axis direction is the X-axis direction. When the sewing machine 1 is installed on a horizontal plane, the X-axis direction and the Y-axis direction are in a state along the horizontal plane, and the Z-axis direction is in a state along the vertical vertical movement direction.
Moreover, the cloth which is a thing to be sewn shall be sent along the X-axis direction.

<Needle vertical movement mechanism>
A needle up-and-down moving mechanism (not shown) includes a needle bar 6 supported so as to be reciprocable in the same direction in the state along the Z-axis direction on the tip side of the sewing machine arm portion 1c, and along the Y-axis direction in the sewing machine arm portion 1c. A crank mechanism (not shown) for converting the rotational driving force of the arranged main shaft (not shown) into a reciprocating vertical driving force and applying it to the needle bar 6 is provided.
Three sewing needles 5a, 5b, 5c are held in a line along the Y-axis direction at the lower end of the needle bar 6, and each of these sewing needles 5a, 5b, 5c It is held so that the tip farther away from the head is lower in height. That is, the sewing needle 5 a is the lowest and the sewing needle 5 c is the highest and is held by the needle bar 6. Here, the three sewing needles 5a, 5b, 5c are provided on the left side when viewed from the operator, and the left needle 5a having the lowest tip height and the middle needle provided at the center when viewed from the operator. 5b and a right needle 5c provided on the right side when viewed from the operator and having the highest tip height.
At the lower end portion of the needle bar 6, the spacing between the sewing needles 5a, 5b, and 5c in the Y-axis direction and the height of the sewing needles 5a, 5b, and 5c in the Z-axis direction are all components such as needle holders. It can be changed by replacement.

<Thread trimming device>
A thread trimming device (not shown) is disposed below the needle plate 2 inside the sewing machine bed portion 1a, and includes a moving knife and a fixed knife that cuts the needle thread T in cooperation with the moving knife. Yes.
Then, after the sewing operation is finished and the sewing needles 5a, 5b, 5c are stopped above the needle plate 2, the needle thread T can be cut below the needle plate 2.

<Wiper device>
Next, the wiper device 20 according to the present embodiment will be described in detail with reference to FIGS.
As shown in FIG. 1, the wiper device 20 is disposed at the lower end of the sewing machine arm portion 1 c and in the vicinity of the sewing needle 5 described above.
The wiper device 20 includes a wiper 30 that moves forward and backward so that the vertical movement path of the sewing needles 5a, 5b, and 5c is between the tip portions of the bifurcated portion, and the wiper 30 when the distal end is bifurcated. And a wiper drive mechanism 40 as a wiper drive means for driving.

As shown in FIG. 2, the wiper 30 has a shape that is folded back in the backward direction at the tip of one extending portion 31 of the two ends of the wiper 30, and the other extending portion of the wiper 30. A hook-like hook 32 is provided as a needle thread catcher protruding on the 33 side.
The hook 32 has an outer end 32a that is in contact with the needle thread T when the wiper drive mechanism 40, which will be described later, moves forward from the tip position of one extension 31 toward the rear and the other extension 33. The needle thread guide part guides the needle thread T between the extension part 31 and the extension part 33.
Here, the outer side of the hook 32 refers to the outer peripheral side of the hook 32, and the inner side is a substantially triangular region surrounded by the extending portion 31 and the extending portion 33 in the hook 32, that is, The wiper 30 is the region where the needle thread T is guided when the wiper 30 is most advanced.
The inner end portion 32c of the hook 32 has a shape inclined with respect to the traveling direction, that is, the Y-axis direction so as to guide the needle thread T captured when the wiper 30 is retracted toward the extension portion 31 side. A groove 32d for holding the needle thread T is formed on the extended portion 31 side of 32c, that is, on the inner side of the proximal end portion of the hook 32. In addition, a leaf spring 31a for pressing and holding the needle thread T guided to the groove 32d is provided at the proximal end portion of the extending portion 31 (see FIG. 2). The leaf spring 31a has a base end portion fixed to the extension portion 31, and a front end portion that covers the groove 32d from above and is biased toward the extension portion 31.

Then, the needle thread T is guided to the one extension part 31 side rather than the protruding end part 32 b of the hook 32 when the wiper 30 moves forward at a position facing the hook 32 in the other extension part 33 of the wiper 30. An inclined needle thread guide 33a is formed.
The inclined needle thread guide portion 33a is configured to cause the needle thread T guided between the extension portions 31 and 33 along the outer end portion 32a of the hook 32 to be one extension portion 31 when the wiper 30 moves forward. It has an inclined shape so as to be guided toward the side. The inclined needle thread guide portion 33a has a starting end A, that is, a rising edge of the inclination, on the rear side in the traveling direction with respect to the protruding end portion 32b of the hook 32 when the wiper 30 moves forward.
Further, the inclined needle thread guide portion 33 a is formed such that the interval between the end B of the inclination and the extending portion 31 is narrower than the interval between the protruding end portion 32 b and the extending portion 31. That is, the terminal end B protrudes inward from the protruding end portion 32b of the hook 32, and the needle thread T guided along the outer end portion 32a of the hook 32 when the wiper 30 advances is more than the protruding end portion 32b. The needle thread guide portion is guided toward the inside and pushed out toward the extending portion 31 side.
Further, the end B is disposed in the foremost position when the above-described extending portions 31 and 33 have a sufficiently long stroke, so that the wiper driving mechanism 40 described later moves the wiper 30 to the foremost position. It is possible to advance to the same position as the sewing needle 5a or to the front side.
Moreover, the edge of the one extension part 31 side in the other extension part 33 including the inclined needle thread guide part 33a is formed in a curved shape as a whole.

As shown in FIGS. 1 and 3, the wiper drive mechanism 40 includes a solenoid 41 as a drive source for advancing the wiper 30 described above between the sewing needles 5 a, 5 b, 5 c and the workpiece on the needle plate 2. A spring spring (not shown) that returns the wiper 30 in the backward direction, and a transmission mechanism including an arm, a guide, and the like that transmit the output of the renoid 41 to the wiper 30 are provided.
The solenoid 41 is attached to the inside of the tip end of the sewing machine arm portion 1 c of the sewing machine frame 1 via a bracket 42. One end of an arm member 43 that constitutes the transmission mechanism is fastened and fixed to the output shaft of the solenoid 41, and a guide holder 44 is rotatably provided at the other end of the arm member 43. One end (lower end) of a guide rod 45 that maintains the orientation of the wiper 30 constant is connected to the guide holder 44. Further, the other end (upper end) of the guide bar 45 is slidably inserted into an insertion hole of a guide passage 46 provided rotatably on the bracket 42.
With the above-described configuration, the wiper drive mechanism 40 advances the wiper 30 so that the tip portions, that is, the extended portions 31 and 33 formed at the fork of the wiper 30 pass through the vertical movement path of the sewing needles 5a, 5b, and 5c. And can be moved backwards.
The wiper drive mechanism 40 is driven by energizing the solenoid 41, and when the energized state of the solenoid 41 is interrupted after the wiper 30 is advanced to a position where the needle thread T is sandwiched at the tip thereof, a spring spring (not shown) The urging force causes the arm member 43 to swing about the output shaft of the solenoid 41 in the counterclockwise direction in FIG. 3, and then retreats to the standby position shown in FIG.
Further, the wiper drive mechanism 40 in the present embodiment moves the wiper 30 to the position where the end B of the above-described inclined needle thread guide portion 33a is at the same position as the sewing needle 5a disposed at the forefront or the front side thereof. It can be driven to move forward.
The tip of the wiper 30 crosses between the sewing needles 5a, 5b, 5c and the sewing product placed on the needle plate 2, so that the hook 32 is connected to the sewing needles 5a, 5b, 5c and the sewing product. The needle thread T stretched between the two can be pulled and pulled out.
The sewing machine 100 applies a predetermined tension to a thread supply source (not shown) that supplies the needle thread T and the needle thread T that is fed from the thread supply source when the sewing operation ends, and the needle thread from the thread supply source. And a thread tension device (not shown) that applies a predetermined resistance force to the feeding of T.

<Description of operation>
Next, the operation of the sewing machine 100 according to the present embodiment will be described in detail with reference to FIGS. 1 to 5.
First, as shown in FIGS. 1 and 3, during the sewing, the wiper 30 is in the vicinity of the sewing needles 5a, 5b, and 5c that are driven up and down and perpendicular to the feeding direction with respect to the sewing needles 5a, 5b, and 5c. The machine is retracted to an obliquely upper position (standby position) near the vertical machine body 1b. Next, with the end of the sewing operation, the sewing needles 5a, 5b, and 5c are stopped at the upper position (position near the top dead center) in the reciprocating vertical movement by the needle vertical movement mechanism (not shown). The needle thread T is cut by the thread cutting mechanism that does not.
Here, the needle thread T supplied from a thread supply source (not shown) passes through the threading holes provided in the sewing needles 5a, 5b and 5c, passes through the workpieces, and is below the needle plate 2. The cut end portion hangs down. A predetermined tension is applied to the needle thread T remaining above the sewing machine bed portion 1a after the cutting by a thread tension device (not shown) provided in the sewing machine arm portion 1c as the sewing operation ends. For this reason, a predetermined resistance force is applied to the feeding of the needle thread T.
When the wiper device 20 is driven, the three needle threads T spanned between the sewing needles 5a, 5b, 5c and the sewing product are caught by the hook 32, and the cut end portion of the sewing product is taken. It is pulled out from below and pulled up and held at the standby position.

Specifically, with the end of the sewing operation described above, the solenoid 41 is energized for a short time, and the solenoid 41 is driven. As the solenoid 41 is driven, the output shaft is rotated in the clockwise direction in FIG. Along with this, the other end side of the arm member 43 is swung clockwise around the output shaft. Further, the guide rod 45 whose lower end is connected to the other end side of the arm member 43 via the guide holder 44 is obliquely lowered along the insertion hole of the guide passage 46 that is rotatably connected to the bracket 42. Slide to the side. Thereby, the wiper 30 fixed to the lower end of the guide bar 45 is moved forward so as to be pushed out toward the sewing needles 5a, 5b, 5c. By this forward movement, the wiper 30 moves forward so that the vertical movement path of the sewing needles 5 a, 5 b, 5 c enters between the extended portions 31, 33 formed at the tip of the wiper 30. The needle plate 2 is disposed in a substantially parallel state (see FIGS. 3 and 4).
When the energization of the solenoid 41 is interrupted, the output shaft is rotated in the reverse direction by the urging force of the spring spring (not shown), the arm member 43 is swung in the counterclockwise direction in FIG. In the state where the needle thread T is held at 32, the needle thread T is again retracted to the standby position described above.

Here, the yarn removal and yarn holding operation by the wiper device 20 will be described in more detail.
As shown in FIG. 2, the wiper 30 before operation includes the vertical movement path of the sewing needles 5 a, 5 b, 5 c between the extended portions 31, 33 formed in a bifurcated manner in the path of forward and backward movement. Placed in position.
Next, as the solenoid 41 is driven, the wiper 30 moves forward in the left direction in FIG. When the wiper 30 reaches the vertical movement path of the sewing needles 5a, 5b, 5c, as shown in FIG. 5 (a), first, the outer end 32a of the hook 32 is viewed from the front side in the traveling direction, that is, viewed from the operator. It abuts on a needle thread T that is stretched between the sewing needle 5c located on the right side and the workpiece.
When the wiper 30 further moves forward, each needle thread T that is stretched between the sewing needles 5a, 5b, 5c and the workpiece to be sewn is sequentially extended along the outer end portion 32a of the hook 32 to the other extension portion 33. It passes through the protruding end 32b of the hook 32 while being moved toward the side (see FIG. 5B). The needle thread T that has passed through the protruding end portion 32b of the hook 32 is forcibly pushed back toward the extending portion 31 along the inclined needle thread guide portion 33a formed on the other extending portion 33. It is guided between 31 and 33 (see FIG. 5C).

The wiper 30 of the wiper device 20 according to this embodiment is configured such that the inclined needle thread guide portion 33a formed in the extending portion 33 is the needle thread T positioned at the foremost position during forward movement by the wiper driving mechanism 40, that is, Advances to a position where the needle thread T stretched between the sewing needle 5a located on the left side when viewed from the operator and the workpiece is brought closer to the front side of the protruding end portion 32b of the hook portion 32, that is, to the extension portion 31 side. (See FIG. 5D). As a result, the three needle threads T spanned between the sewing needles 5a, 5b, and 5c and the workpiece are all forced on the track of the inner end 32c, that is, the hook 32 when the wiper 30 moves backward. Will be arranged.
When the hook 32 is retracted, the three needle threads T arranged on the track of the hook 32 (more specifically, the inner end portion 32c) are guided to the groove 32d along the inner end portion 32c. (See FIG. 5 (e)), and is caught by the hook 32 by being sandwiched between the extension portion 31 and the leaf spring 31a in the groove 32d.
In addition, since the needle thread T has a predetermined resistance force applied to the needle thread T by the above-described thread tension device, the cut end portion is pulled upward from the lower side of the sewing product as the wiper 30 moves backward, The wiper 30 is attracted and held at the standby position of the wiper 30 described above.

<Effect of embodiment>
As described above, according to the sewing machine 100 according to the present embodiment, when the wiper 30 moves forward, the needle thread T suspended between the tips of the sewing needles 5a, 5b, and 5c and the workpiece is Along the inclined needle thread guide portion 33a formed in the extending portion, the other extending portion 31 side having the hook 32 can be positively moved and guided. Accordingly, the needle thread T can be forcibly arranged on the track when the wiper 30 is retracted, and the needle thread T can be reliably captured when the wiper 30 is retracted.
In addition, it has a simple structure in which an inclined needle thread guide portion 33a that actively guides the needle thread T to the other extending portion 31 side is provided in one extending portion 33 at the tip of the wiper 30 formed in a bifurcated manner. However, the catching failure of the needle thread T when the wiper 30 moves backward can be remarkably reduced, and the yarn wiper failure can be effectively prevented with a simple structure.
Further, the inclined needle thread guide 33a is pushed out by the wiper driving mechanism 40 to the position where the end B thereof is in front of the sewing needle 5a disposed on the most front side when the wiper 30 moves forward. All the needle threads T stretched between the sewing needles 5a, 5b, 5c and the workpiece to be sewn can be arranged close to the track of the hook 32 when the wiper 30 moves backward. Accordingly, it is possible to reliably capture all the needle threads T, and it is possible to extremely effectively prevent a thread wipe failure that occurs when the needle threads T cannot be captured.
Further, the inclined needle thread guide portion 33a can forcibly and smoothly guide the needle thread T toward the other extending portion 31 side by forming the start end A and the end end B in a curved shape. . Thereby, the hook 32 which is a needle thread | yarn capture part cannot catch the needle thread | yarn T, and can prevent the thread | yarn wiping failure more effectively with a simple structure.

The wiper driving means employs the solenoid 41 in the present embodiment, but is not necessarily limited thereto, and other actuators such as an air cylinder and a pulse motor may be applied.
Further, when the inclined needle thread guide portion 33a is pushed out to the foremost position by the wiper drive mechanism 40, the end B thereof is in the front-rear direction with respect to the sewing needle 5a disposed at the foremost side when the wiper 30 moves forward. It suffices if it is formed so as to be pushed out to the same position or forward of the needle 5a, and the movable range of the wiper drive mechanism 40 is adjusted, and the lengths of the extending portions 31, 33 are formed to be sufficiently long. Therefore, it can be formed at a desired position.
Further, in the present embodiment, the inclined needle thread guide portion 33a has a shape in which the starting end A rises from the rear side of the protruding end portion 32b of the hook 32 when the wiper 30 moves forward, but is not necessarily limited thereto. Instead, for example, when the width between the extending portions 31 and 33 is ensured to be wide, it is also possible to have a shape that rises from the front side of the protruding end portion 32b of the hook 32 when the wiper 30 moves forward. .
The inclined needle thread guide portion 33a only needs to satisfy the above-described constituent requirements. For example, the inclination angle with respect to the traveling direction is smooth and effective when the wiper 30 moves forward due to the arrangement of the start end A and the end end B. In particular, the needle thread T can be brought closer to the extending portion 31 side than the protruding end portion 32b of the hook 32, and any angle can be used as long as the above-described thread wiping and thread holding operation can be realized satisfactorily.

1 is a perspective view showing a schematic configuration of a sewing machine according to the present invention. It is a top view which shows the shape of the wiper in the sewing machine which concerns on this invention, and its standby state. It is a perspective view which shows the most advanced state of the wiper apparatus in the sewing machine which concerns on this invention. It is a top view which shows the most advanced state of the wiper apparatus in the sewing machine which concerns on this invention. It is operation | movement explanatory drawing which shows the needle thread capture | acquisition operation | movement by the wiper in the sewing machine which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine frame 1a Sewing machine bed part 1b Sewing machine vertical trunk part 1c Sewing machine arm part 2 Needle plate 5 Sewing needle 6 Needle bar 7 Cloth presser 20 Wiper device (thread holding means)
30 Wiper 31 Extension part 31a Leaf spring 32 Hook (needle thread catching part)
32a Outer end portion 32b Protruding end portion 32c Inner end portion 33 Extension portion 33a Inclined needle thread guide portion 40 Wiper drive mechanism 41 Solenoid 42 Bracket 43 Arm member 44 Guide holder 45 Guide rod 46 Guide thread 100 Sewing machine A Start end B End T Needle yarn

Claims (3)

Needle up-and-down moving means for driving the sewing needle up and down;
Thread trimming means for cutting the needle thread below the needle plate of the sewing machine bed;
Thread holding means for pulling and holding the cut end portion of the needle thread that is stretched between the sewing needle and the workpiece,
The yarn holding means is
A wiper that is formed so that the tip is bifurcated and moves up and down so that the vertical movement path of the sewing needle enters between the bifurcated,
Wiper driving means for driving the wiper,
At the tip of one extension part of the wiper formed at the fork, there is a hook-like needle thread catching part that is folded back in the backward direction and protrudes toward the other extension part side of the wiper. In the sewing machine
An inclined needle that guides the needle thread to the one extension part side rather than the protruding end part of the needle thread catching part when the wiper moves forward, at a position facing the needle thread catching part in the other extension part. A sewing machine having a thread guide portion formed therein. A plurality of sewing needles arranged side by side in the forward and backward movement direction of the wiper;
The wiper driving means is configured to advance the wiper to a position where the end of the needle thread guide portion is placed in the front-rear direction or the front side of the frontmost needle with respect to the frontmost needle. The sewing machine according to claim 1, wherein   The sewing machine according to claim 1 or 2, wherein the end portion of the needle thread guide portion is formed in a curved shape.

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