JP2562327Y2 - Hem ruler in sewing machine - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a hem pulling ruler device used for performing hem pull sewing, ceiling pulling or lip stitching on a sewing machine, and particularly to a hem pull ruler base. The present invention relates to a hem pulling ruler device in which a ruler blade provided with a front end thereof facing a cloth guide surface is rotatable.

[Prior Art] Generally, when performing hem-stitching, ceiling-stitching or lip-stitching, a fixed hem ruler is arranged on the front side of a needle drop portion of a sewing machine main body, and the cloth of the fixed hem ruler is provided. The outer side of the lower bent portion of the fabric end bent in, for example, an S-shape along the cloth feeding direction is brought into contact with the guide surface, and the needle falls while the lower bent portion is along the cloth guide surface. I send it to the department.

By the way, as described above, in order to keep the cloth end in the state of being bent into an S-shape, the hem pulling ruler base is bent into a U-shape, and the tip is attached to the cloth guide surface of the hem pulling ruler base. The ruler blades facing each other are connected. The ruler blades can be moved from the working position to the non-working position when the cloth edge is inserted or removed, or when sewing the periphery of a round object such as a cuff, when approaching the end of sewing. It must be supported so that it cannot be woken up during the work.

As a conventional technique for solving such a problem, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 4253, a drive unit of a reciprocating solenoid is connected to a ruler blade rotatable about a rotation axis parallel to the cloth feeding direction, and a forward movement is performed during the operation of the sewing machine. By energizing the solenoid to fix the ruler blades connected to the drive unit in the down position, at the time of removing the cloth, etc., the drive unit is returned by energizing the return solenoid to cause the drive unit to perform a return operation. Something has been suggested to cause it.

[Problem to be Solved by the Invention] However, in the apparatus disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 53-44253, the forward movement solenoid is always energized during the operation of the sewing machine. Since it is configured to be fixed in the fallen state, the tip of the ruler blade and the cloth guide surface facing portion of the hem pulling ruler base are firmly held at a constant interval. If the distance between the tip of the ruler blade and the cloth guide surface of the hem pulling ruler base is fixed in this way, especially when a thick cloth such as jersey or knit has a protruding portion formed by stitching on the surface of this cloth. ,
This protruding portion is clogged in the facing portion, and there is a problem that the fabric is twisted or stretched and a smooth sewing operation cannot be performed.

In addition, as described above, if the forward solenoid is always energized during the operation of the sewing machine and the ruler blade is pressed by the driving force, a large amount of power is consumed and the coil of the forward solenoid is overheated. There is also a problem that there is a risk of the occurrence.

The present invention has been made in view of the above circumstances, and even if there is a protrusion on the front side of the fabric, this protrusion does not become jammed between the hem pulling ruler base and the ruler blade. It is another object of the present invention to provide a foot ruler device for a sewing machine in which power consumption by a solenoid is reduced and the solenoid is not overheated and burned out.

[Means for Solving the Problems] In the hem pulling ruler device in the sewing machine according to the first invention, the drive unit is moved in only one direction by energizing to the side of the heel pulling ruler side as viewed from the ruler blade in the operating position. An actuating solenoid is provided, and between the drive unit of the solenoid and the ruler blade, the solenoid is energized to interlock with the operation of the drive unit, so that the ruler blade is turned by the rotation about the rotation axis. When the energization to the solenoid is stopped after raising the ruler blade to the inoperative position, the link mechanism that maintains the ruler blade so as not to be tilted by the moment generated at the connecting portion of the ruler blade is connected, Further, a spring biasing means for constantly biasing the ruler blade downwardly via the link mechanism is provided.

Further, the skirt pulling ruler device in the sewing machine according to the second invention is provided on the side of the skirt pulling ruler base when viewed from the ruler blade in the operation position, and a solenoid in which the drive unit operates only in one direction when energized; A link mechanism for connecting the drive unit of the solenoid to the ruler blade; and a spring biasing means for maintaining the ruler blade at a predetermined position via the link mechanism. By actuating, the ruler blade is caused to rotate by the rotation about the rotation axis against the urging force of the spring urging means, and when the energization to the solenoid is stopped after the ruler blade has been caused, The ruler blade is prevented from falling down by a moment generated to rotate about the rotation axis by the gravity of the blade and the link mechanism. .

In the hem pulling ruler device for a sewing machine according to the second invention, a link mechanism is connected to a drive lever fixed to a drive shaft of the rotary solenoid by using a rotary solenoid as a solenoid, and is connected between the drive lever and the ruler blade. And a connecting link to be used. In this case, in the third invention, the spring urging means is configured to press the intermediate portion of the connecting link downward.

Further, a fourth device is provided with a solenoid that is provided on a side of a hem pulling ruler base when viewed from a ruler blade at an operation position, and a driving unit operates only in one direction when energized, and a driving unit of the solenoid and the solenoid. A link mechanism for connecting the ruler blade, and a spring biasing means for maintaining the ruler blade at a predetermined position via the link mechanism. The ruler blade is caused to rotate by the rotation about the rotation axis against the urging force of the urging means, and when the energization to the solenoid is stopped after the ruler blade is caused, the urging force by the spring urging means is generated. Thus, the ruler blade is prevented from falling down by a moment generated to rotate around the rotation axis.

Also in this case, by using a rotary solenoid as the solenoid, the link mechanism can be configured with a drive lever fixed to the drive unit of the rotary solenoid and a connection link connected between the drive lever and the ruler blade. it can. In the fifth invention, such a link mechanism is rotated so that the connecting portion between the connecting link and the ruler blade moves below a straight line extending from the connecting portion between the driving lever and the connecting link to the rotation axis of the ruler blade. On the other hand, the spring biasing means is configured to apply a biasing force to the connection link in a direction opposite to a driving force by the rotary solenoid.

According to a sixth aspect of the present invention, there is provided a solenoid which is connected to the ruler blade via a link mechanism and which is operated in a direction in which a drive unit raises the ruler blade; And a spring for selectively biasing to one of the positions.
Also in the sixth invention, similarly to the second invention, the solenoid can use a rotary solenoid and the link mechanism can be constituted by a drive lever and a connecting link, thereby, as in the seventh invention, By providing spring biasing means for selectively biasing the drive lever toward both ends of its swing stroke, the ruler blade is maintained at a predetermined operating position and the raised ruler blade is maintained at an inoperative position. I can do it.

[Operation] In the first invention configured as described above, the ruler blade is constantly urged downward by the urging force of the spring urging means obtained via the link mechanism during the hemming operation. Therefore, when a cloth portion having no protrusion on the front side is passing therethrough, the tip of the ruler blade is maintained at a predetermined operating position by the urging force, and the protrusion having a large protrusion amount is moved to the opposite portion by the protrusion. When trying to pass through, the ruler blade is lifted up against the urging force and widens the interval with the cloth guide surface. In addition, when the solenoid is driven, the ruler blades jump up and are brought to the inoperative position, so that the cloth can be easily inserted into or removed from the ruler blades. In this provoked state, the moment about the pivot axis acts in the direction to maintain or raise the state, and the ruler blade does not fall to the operation position side.

In the second invention, the ruler blade is urged to be maintained at a predetermined operating position by the urging force of the spring urging means obtained via the link mechanism during the hemming operation.
Therefore, when a cloth portion on which no protrusion is formed on the front side is passing, the tip of the ruler blade is maintained at a predetermined operation position, and a protrusion with a large protrusion amount tries to pass through the facing portion. Then, the ruler blade is lifted against the urging force, and the distance between the ruler blade and the cloth guide surface is increased. Also, when the solenoid is driven, the ruler blades jump up against the urging force of the spring urging means via the link mechanism connected between the drive unit of the solenoid and the ruler blades, and are raised to the inoperative position, Insertion of the fabric into the ruler blade or removal of the fabric from the ruler blade is facilitated. In this provoked state, the moment about the rotation axis caused by the gravity of the ruler blade and the link mechanism acts in the direction to maintain or cause the state, and the ruler blade does not fall to the operation position side. In this case, in the case of the third invention, the urging force for maintaining the ruler blade in the operation position at that position is directed downward, and the ruler blade is caused to rotate about the rotation axis to move to the inoperative position. When rotated, the moment about the rotation axis generated by the spring urging force and the gravity both act in a direction to maintain the ruler blade in its inoperative position.

In the fourth invention, when the ruler blade is maintained at a predetermined operating position by the spring biasing force in the hem pulling work table, and when the solenoid is energized to rotate the ruler blade toward the non-operating position, Even if the energization of the solenoid is stopped, the ruler blade is kept at a predetermined inoperative position by the rotational moment generated by the spring urging force. Of course, the ruler blade maintained in the operating position is lifted against the urging force when the protruding portion having a large amount of protrusion attempts to pass through the opposing portion between the tip of the ruler blade and the cloth guide surface, and is brought into contact with the cloth guide surface. To increase the interval. According to the fifth aspect of the present invention, the connection between the connection link and the ruler blade is rotationally moved to a region below a straight line extending from the connection between the drive lever and the connection link to the rotation axis of the ruler blade, so that the spring bias is applied. The moment generated about the rotation axis by the urging force of the means prevents the ruler blade caused by the jumping-up from falling to the action position side.

In a sixth aspect of the invention, the spring biasing means, which functions to maintain the ruler blade in the operative position, maintains the ruler blade in its raised inoperative position when the ruler blade is flipped up and caused. It functions as a force to do. In other words, the spring urging means does not cause the ruler blade that has been caused to fall to the operating position, and prevents the caused ruler blade from falling due to other factors. In the case of the seventh invention, the spring urging means maintains the ruler blade in the working position or the non-working position by biasing the drive lever constituting the link mechanism toward both ends of the swing stroke.

[Embodiment] Hereinafter, the present invention will be described based on an illustrated embodiment.

FIG. 1 is a front view of the hem pulling ruler device of the first embodiment.
In this hem pulling ruler device, the bracket 1 is fixed to the right side of the needle drop portion (not shown) of the sewing machine body at the screwing portions 2, 2, so that the bracket 1 is in the working position with the cloth guide surface 301 of the hem pulling ruler base 3. A portion of a certain ruler blade 4 facing the front end portion 401 is disposed on the near side of the needle drop portion.

That is, one end of the bracket 1 is pivotally connected to one end of a unitized position adjusting table 5 of the hem pulling ruler device via the hinge screw 6, whereby the position adjusting table 5 is It can rotate to the near side. The position adjusting table 5 is always fixed to the bracket 1 by a lock mechanism (not shown).

The position adjusting table 5 supports the position adjusting shaft 7 so as to be slidable in the horizontal direction, and finely moves the position adjusting shaft 7 in the horizontal direction by rotating a direct screw 8 screwed to one end of the position adjusting shaft 7. Adjustable.

The position adjusting shaft 7 is immovably fixed by a lock screw 9 screwed to the position adjusting table 5. After the position of the position adjusting shaft 7 in the horizontal direction is set by the adjusting screw 8, the lock screw 9 9 fixed. The position adjusting shaft 7 is prevented from rotating by a rotation preventing mechanism (not shown).

A hem ruler base 3 having a fixed cloth guide surface 301 formed at the end thereof is fitted into the end of the position adjusting shaft 7.
Further, the skirt puller ruler base 3 is fixed to the position adjusting shaft 7 by screws 10,10. A ruler blade mounting member 11 is fixed to the upper surface of the hem pulling ruler base 3 via a screw 12 so as to be movable in the left-right direction. The base end 402 of the sheet metal ruler blade 4 bent in a U-shape is pivotally attached to the rotation axis P at the tip of the ruler blade mounting member 11. The ruler blade 4 moves downward in a state where the tip end portion 401 faces a fixed cloth guide surface 301 of the hem pulling ruler base 3 while maintaining a predetermined gap (a state indicated by a solid line in FIG. 1). The rotation is locked. Then, when the fabric is folded and set in an S-shape, it is caused to jump up to an upper ineffective position as shown by a two-dot chain line in FIG.

A solenoid mount 13 that stands upward is fixed to the position adjusting shaft 7, and a rotary solenoid 14 for flipping up a ruler blade has a drive shaft 14a directed rearward on an upper portion of the solenoid mount 13. It is installed. This rotary solenoid 14 can rotate the drive shaft 14a only counterclockwise (in the direction of arrow A in the figure) by energizing. A drive lever 15 is fixed to the drive shaft 14a, the tip of which is inclined downward and left when the drive shaft 14a is rotated clockwise.

One end of a connecting link 16 extending toward the ruler blade 4 is rotatably connected to the tip of the drive lever 15. The other end of the connecting link 16 is on the upper surface of the ruler blade 4 and has a base end 40.
2 is pivotally connected to a connecting member 403 provided in the vicinity. The connecting link 16 is "V" to form the top to the upper side in the ruler blade 4 side than the center-shape are bent, and connecting portion Q ₂ of the ruler blade 4 a connecting portion to Q ₁ and the driving lever 15 Each of the straight portions 161 and 162, which are separated from the bent portion, are disposed so as to be inclined downward in the direction toward the ruler blade 4 side. The straight portion 162 of the connecting link 16 on the side of the ruler blade 4 is
As shown by the two-dot chain line in FIG. 1, when the ruler blade 4 is flipped up to a predetermined position, the rotation axis P of the ruler blade 4 is formed on the axial extension of the linear portion 162. ing.

The drive lever 15 is provided with a spring engaging projection 151 projecting in a direction perpendicular to the longitudinal direction of the drive lever 15, and one end of the spring engaging projection 151 is engaged with the drive lever 15. A torsion coil spring 17, which is stopped and the other end is locked to the upper end side of the connection link 16, is pivotally mounted. Therefore, the connection link 16 is constantly urged downward by the elastic force of the torsion coil spring 17.

Reference numeral 18 denotes an auxiliary ruler provided adjacent to the needle dropping part side of the hem pulling ruler base 3, and is slidably held in a direction perpendicular to the cloth feeding direction (arrows XY in the drawing). . The auxiliary ruler body 18 uses a rotary solenoid 20 held on the position adjusting shaft 7 via a solenoid mounting plate 19 as a drive source when a step sewing portion or the like protruding toward the fixed cloth guide surface 301 is detected. It is designed to be driven backward against a biasing force of a spring (not shown). 21 is a drive lever mounted on the drive shaft 20a of the rotary solenoid 20, 22 is a connection link interposed between the tip of the drive lever 21 and the auxiliary ruler 18, and 23 and 24 are side faces of the drive lever 21. And an adjustment screw for restricting the amount of rotation of the drive lever 21 by contacting the drive lever 21. Reference numeral 25 shown in FIG. 2 is a detector that detects a stitch portion protruding toward the fixed cloth guide surface 301, and is provided so as to be able to protrude and retract in a direction orthogonal to the cloth feeding direction.

In the hem pulling ruler device of the first embodiment configured as described above, like the step sewing portion in the case of a thick cloth such as jersey, the ruler blade 4 at the front side, that is, the tip end 401 of the ruler blade 4 at the operation position is opposed to the stitching portion. When there is a large protrusion on the surface side, it operates as shown in FIG. That is, the protruding portion N ₁ of the fabric N is when you try to pass through the gap between the tip portion 401 of the fixing cloth guide surface 301 and the ruler blade 4 Suso引ruler stand 3, which is pressed tip 401 by the projecting portion N ₁ The ruler blade 4 slightly rises up against the urging force of the torsion coil spring 17. Therefore, the tip portion 401 of the ruler blade 4 moves from the normal state shown by the one-dot chain line in FIG. 2, that is, the state maintained at the predetermined operation position, to the state shown by the solid line away from the fixed cloth guide surface 301. , therefore the fabric despite the protrusion N ₁ is to be sent smoothly to the needle drop point side. When there is a protruding portion on the back surface of the fabric due to a step sewing portion or the like, the auxiliary ruler body 18 is retracted in the arrow Y direction so that sewing can be performed at a constant sewing allowance depth.

Furthermore, in the hem pulling ruler device configured as described above,
By controlling the rotary solenoid 14 for jumping up the ruler blade by a signal output when the counted number of hand movements reaches a predetermined value or by a button operation by an operator, the ruler blade 4 is automatically turned on at the end of sewing. Can jump up. That is, when the rotary solenoid 14 is energized, the drive shaft 14a rotates in the direction A, whereby the ruler blade 4 pulled by the connecting link 16 jumps up to an inactive position as shown by a two-dot chain line in FIG. It stands up.

When the ruler blade 4 is raised to the inoperative position in this way, even if the energization to the rotary solenoid 14 is stopped, the ruler blade 4 does not fall down,
Therefore, energization of the rotary solenoid 14 can be stopped at that time. That is, when the energization of the rotary solenoid 14 is stopped, the connecting link 16 inclined in the direction descending toward the ruler blade 4 tends to descend in the direction of inclination mainly by its own gravity.
Moment thereby generated in the coupling part Q ₂ of the connecting link 16 and the ruler blade 4, because those toward the pivot axis P of the ruler blade 4, ruler blade 4 by this moment is moved from the inoperative position times It does not rotate around the dynamic axis P. Ruler blade 4 that jumped up as above
After the fabric folded in an S-shape is inserted, the operator can manually and directly rotate the ruler blade 4 so that the ruler blade 4 can be turned to a working position shown by a solid line in FIG. .

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. FIG. However, in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description will be omitted.

In the second embodiment, a solenoid mounting base 13A fixed to the position adjusting shaft 7 similarly to the above-described solenoid mounting base 13 includes:
A rotary solenoid 14A is mounted in place of the rotary solenoid 14 for flipping up a ruler blade. A drive lever 15A is fixed to a drive shaft 14Aa of the rotary solenoid 14A, and a central portion of a spiral spring 17A is externally fitted. An inner peripheral end of the spiral spring 17A is fixed to the drive shaft 14Aa, and an outer peripheral end is connected to the rotary solenoid.
By fixing to the claws 14Ab protruding from the outer wall of 14A,
The drive lever 15A the connecting link 16A pivotally mounted on the connecting portion Q _1A of the upper end connecting portion Q _2A side to the other end i.e. connecting link 16A and the ruler blade 4 of the connecting link 16A (Fig Nakaya marks C
Direction side). Meanwhile, the rotary solenoid 14A is intended to rotate in a direction (FIG. 3 Nakaya marks B direction) in which the drive shaft 14Aa is moved away the connecting portion Q _1A from ruler blade 4 by energizing, whereby the rotary solenoid 14A When energized, the connecting link 16A can move against the biasing force of the spiral spring 17A in the direction of the inoperative position where the ruler blade 4 is caused, as shown in FIG. Further, the connecting link 16A in the connecting portion Q _2A, is rotatably pivoted to the connecting member 403 of the ruler blade 4 that rotates about the rotation axis P with respect Suso引ruler table 3. And the connecting portion Q _2A
When the ruler blade 4 is flipped up to the inoperative position by the rotary solenoid 14A, the straight line Q _1A P connecting the connecting portion Q _1A and the rotation axis P (see FIG. 4) or this straight line Q _1A P
It is designed to rotate to a lower position.

According to the apparatus of the second embodiment as described above, when the defeated ruler blade 4 at the operating position, the connecting link 16A is biased to the connecting portion Q _2A side as a biasing source spring 17A spiral, thus ruler The blade 4 is pressed downward and is maintained at a predetermined operating position where sewing can be performed. In addition, spiral spring 17
Since the urging force by A acts in the direction of a straight line connecting the connecting portions Q _1A and Q _2A , by energizing the rotary solenoid 14A, the ruler blade 4 is once jumped up to the inoperative position as shown in FIG. when caused, by coupling portions Q _2A be stopped energization is positioned below the straight line Q _1A P or on the straight line Q _1A P, by the urging force of the spiral spring 17A, ruler blade 4 There is no moment for rotating the connecting member 403 in the direction in which the sewing operation is enabled. Of course, the ruler blade 4 in the non-operation position in this manner can be moved to the operation position where the sewing operation can be performed by directly rotating the operator's hand as in the first embodiment.

FIG. 5 shows a third embodiment of the present invention. Also in the third embodiment, the same parts as those in the first embodiment or the second embodiment are denoted by the same reference numerals, and a part of the description is omitted.

In the third embodiment, a rotary solenoid 14B for jumping up a ruler blade is mounted on a solenoid mounting base 13B in place of the solenoid mounting base 13 or 13A. The drive lever 15B fixed to the drive shaft 14Ba of the rotary solenoid 14B has a connecting portion Q located above the drive shaft 14Ba.
Together with the connecting link 16A similar to the case of the second embodiment is pivotally connected to the _1A, the drive shaft 14Ba parallel pin 26 to an intermediate portion of the connecting portion Q _1A is projected with the drive shaft 14Ba. On the other hand, a leaf spring 17B whose lower surface is in contact with the pin 26 is mounted on the solenoid mounting base 13B at a position corresponding to the arc of the arc drawn by the pin 26 with the rotation of the drive lever 15B. I have. Therefore, when the drive lever 15B is located at both ends of its swing stroke, that is, when the ruler blade 4 is in the operative position in which the sewing operation can be laid down as shown by a solid line in FIG. when in the upright inoperative position as, by leaf spring 17B at each location is biased urging the pin 26, the connecting portion Q _2A of the connecting link 16A and the connecting member 403 is pressed downward, which Thus, the ruler blade 4 is maintained at a predetermined position without arbitrarily moving between the two positions. However, when the rotary solenoid 14B is energized while the ruler blade 4 is in the sewing workable position, the pin 26
Can be moved by elastically deforming the leaf spring 17B in an arc shape, so that the drive lever 15B is forcibly rotated in the direction of moving the ruler blade to the flip-up position (the direction of arrow B in the figure). Also, in a state where the ruler blade 4 is in the non-operation position,
The pin 26 also moves the leaf spring 17B by elastically deforming the leaf spring 17B into an arc by lowering the ruler blade 4 by hand so as to be in an operation position where sewing can be performed. As described above, in the third embodiment, the leaf spring 17B presses the pin 26 to push the drive lever 1
Since the arbitrary rotation of the 5B is prevented, the ruler blade 4 is prevented from inadvertently falling from the inoperative position where it stands up to the operating position side.

By the way, in the third embodiment, the link 16
A and the connecting structure of the connecting link 16A and the ruler blade 4 are the same as those of the second embodiment, but the drive lever 15B is selectively biased toward both ends of the swing stroke as in the present embodiment. In the case of biasing, for example,
By appropriately selecting the position of 26 and the strength of the leaf spring 17B, the connecting link 16A and the connecting structure of the connecting link 16A and the ruler blade 4 as described above may not necessarily be adopted. Also, a configuration in which the drive lever is biased and biased to both ends of the swing stroke may be used as described above.
Instead of the structure including the pin 26 and the pin 26, a structure in which a tension spring 17C is stretched between the upper end of the drive lever 15C and the outer wall of the rotary solenoid 14C as shown in FIG. 6 may be employed.

In the present invention, for example, instead of the rotary solenoid used in each of the above embodiments, a solenoid of a type in which a drive rod advances and retreats may be used as a solenoid for raising a ruler blade. A similar operation can be performed. Further, the spring biasing means for maintaining the ruler blade at a predetermined position via the link mechanism is not necessarily limited to those in the above embodiments, and various design changes are possible.

[Effects of the Invention] According to claims 1 to 7, in thick cloth such as jersey or knit, even if there is a protruding portion on the front side of the cloth due to a step sewing portion or the like, the ruler blade is opposed to the spring urging means. Because it can move in the direction to widen the gap between the tip and the cloth guide surface,
It is possible to prevent the fabric from being clogged in the gap and impairing the smooth work, thereby improving workability. Further, since the solenoid only needs to be momentarily energized when the ruler blade is caused, the power consumption may be small without burning out due to overheating.

According to the second and third aspects, since the solenoid only needs to be able to move the link mechanism against gravity, a smaller capacity solenoid is required.

According to the fourth aspect, the spring urging means is configured to maintain the ruler blade at the predetermined position by the urging force for rotating the ruler blade to the operation position side. Therefore, the urging force acts directly on the ruler blade. Therefore, it is possible to increase the holding force of the ruler blade in the operating position.

According to the fifth aspect, the ruler blade, which is caused by jumping up without providing a holding mechanism, is prevented from falling to the operation position side by the urging force of the spring urging means. It only has to be brought down to the working position with.

According to the sixth aspect, by the urging force of the spring urging means, the ruler blade is securely held in the two states of maintaining the collapsed operation position and the predetermined inoperative position which is raised and raised, and the ruler blade is useless. This has the effect of preventing the movement of

According to the seventh aspect, the effect of the sixth aspect can be obtained with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a front view of the first embodiment, FIG. 2 is an operation explanatory view for explaining the operation of the ruler blade, FIG. 3 is a rear view of a main part showing the periphery of the rotary solenoid in the second embodiment, and FIG. Similarly, FIG. 5 is a front view of the third embodiment, and FIG. 6 is a schematic diagram illustrating a modification of the third embodiment. 3 ... Hem pulling ruler base 301 ... ... fixed cloth guide surface (cloth guide surface) 4 ... ruler blade, 401 ... tip end, 402 ... base end 14,14A, 14B, 14C ... rotary solenoid 14a, 14Aa, 14Ba… drive shaft (drive unit) 15, 15A, 15B, 15C… drive lever (link mechanism) 16, 16A… connection link (link mechanism) 17… torsion coil spring (spring biasing means) 17A… ... coil spring (spring biasing means) 17B ...... plate spring (spring biasing means) 17C ...... tension spring (biasing means spring) P ...... pivot axis, Q _2, Q _2A ...... connecting portion

Claims (7)

(57) [Scope of request for utility model registration] 1. A skirt puller base having a fixed cloth guide surface, and a base end portion rotatably connected to said skirt puller base via a rotation shaft parallel to a cloth feeding direction and in an operating position. A U-shaped ruler blade having a leading end portion facing the cloth guide surface of the hem pulling ruler base is disposed on the front side of the needle drop section of the sewing machine main body, and the cloth end bent along the cloth feeding direction is provided. In a hem pulling ruler device of a sewing machine that guides a bent portion to a needle drop portion,
A solenoid is provided in which a drive section operates only in one direction when energized, and between the drive section of the solenoid and the ruler blade, the solenoid is energized to rotate the ruler blade in conjunction with the operation of the drive section. Rotation about the dynamic axis can cause the inoperative position, and when energizing the solenoid after raising the ruler blade to this inoperative position, the moment generated in the connecting portion of the ruler blade causes the ruler blade to fall down. A hem pulling ruler device for a sewing machine, characterized in that a link mechanism for maintaining the ruler is not connected, and spring biasing means for constantly biasing the ruler blade downward through the link mechanism is provided. 2. A skirt puller base having a fixed cloth guide surface, and a base end portion rotatably connected to said skirt puller base via a rotation shaft parallel to a cloth feeding direction and in an operation position. A U-shaped ruler blade having a leading end portion facing the cloth guide surface of the hem pulling ruler base is disposed on the front side of the needle drop section of the sewing machine main body, and the cloth end bent along the cloth feeding direction is provided. In a hem pulling ruler device of a sewing machine that guides a bent portion to a needle drop portion, a driving portion is provided in a side of a hem pulling ruler side when viewed from a ruler blade at an operation position, and a drive portion is moved in one direction by energizing. A solenoid that operates only the solenoid, a link mechanism that connects the drive unit of the solenoid to the ruler blade, and spring biasing means that maintains the ruler blade at a predetermined position via the link mechanism. Operating the drive Thus, the ruler blade is caused by the rotation about the rotation axis against the urging force of the spring urging means, and when the energization to the solenoid is stopped after the ruler blade is caused, the ruler blade and A skirt pulling ruler device for a sewing machine, wherein the ruler blade is prevented from falling down by a moment generated to rotate about the rotation axis by gravity of a link mechanism. 3. A rotary solenoid, wherein the solenoid comprises a drive lever fixed to a drive shaft of the rotary solenoid, and a connection link connected between the drive lever and a ruler blade. The connecting portion between the link and the drive lever is provided above the connecting portion between the connecting link and the ruler blade, and the spring biasing means presses the intermediate portion of the connecting link downward. 3. A skirt pulling ruler device for a sewing machine according to claim 2, wherein 4. A skirt puller base having a fixed cloth guide surface, and a base end portion is rotatably connected to said skirt puller base via a rotation shaft parallel to a cloth feeding direction and in an operation position. A U-shaped ruler blade having a leading end portion facing the cloth guide surface of the hem pulling ruler base is disposed on the front side of the needle drop section of the sewing machine main body, and the cloth end bent along the cloth feeding direction is provided. In a hem pulling ruler device of a sewing machine that guides a bent portion to a needle drop portion, a driving portion is provided in a side of a hem pulling ruler side when viewed from a ruler blade at an operation position, and a drive portion is moved in one direction by energizing. A solenoid that operates only the solenoid, a link mechanism that connects the drive unit of the solenoid to the ruler blade, and spring biasing means that maintains the ruler blade at a predetermined position via the link mechanism. Operating the drive When the ruler blade is caused to rotate around the rotation axis against the urging force of the spring urging means, and when the energization to the solenoid is stopped after the ruler blade is caused, the spring A hem pulling ruler device for a sewing machine, wherein the ruler blade is prevented from falling down by a moment generated to rotate about the rotation axis by a biasing force of a biasing means. 5. The rotary mechanism according to claim 1, wherein the solenoid is a rotary solenoid, and the link mechanism comprises a drive lever fixed to a drive shaft of the rotary solenoid and a connection link connected between the drive lever and a ruler blade. Is caused, the connecting portion between the connecting link and the ruler blade is rotatably moved below a straight line extending from the connecting portion between the drive lever and the connecting link to the rotation axis of the ruler blade, and The hem pulling ruler device according to claim 4, wherein the urging means applies a urging force to the connecting link in a direction opposite to a driving direction of the rotary solenoid. 6. A skirt puller base having a fixed cloth guide surface, and a base end portion is rotatably connected to said skirt puller base via a rotation shaft parallel to the cloth feeding direction, and in a working position. A U-shaped ruler blade having a leading end portion facing the cloth guide surface of the hem pulling ruler base is disposed on the front side of the needle drop section of the sewing machine main body, and the cloth end bent along the cloth feeding direction is provided. In a hem pulling ruler device for a sewing machine configured to guide a bent portion to a needle drop portion, a solenoid that is connected to the ruler blade via a link mechanism, and a driving unit operates in a direction in which the ruler blade stands up; A hem pulling ruler device for a sewing machine, comprising: a spring for selectively biasing and biasing the ruler blade to one of a non-operating position where the ruler blade is standing and an operating position where the ruler blade is lying down. 7. The solenoid is a rotary solenoid, and the link mechanism comprises a drive lever fixed to a drive shaft of the rotary solenoid, a connection link connected between the drive lever and a ruler blade, and a spring bias. 7. The hem pulling ruler device according to claim 6, wherein the means selectively biases the drive lever toward both ends of its swing stroke.