JP2009136525A - Pedal device of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pedal device of a sewing machine capable of easily changing the imparting number of break feeling and improving productivity. <P>SOLUTION: The pedal device of the sewing machine includes a break feeling imparting mechanism 10 capable of imparting the break feeling every time of the movement to a prescribed control position P of an operation lever 4 successively movable to control positions P set in two or more stages by the operation of a turnably supported step pedal. The break feeling imparting mechanism 10 includes an adjusting member 12 connected with the operation lever 4 by a connection means 11 and a planar member 15 engaged with a plurality of linear parallel grooves 14 of a sliding member 13 supported at the end of the adjusting member 12 and disposed so as to be slid across the parallel grooves 14. By adjusting the connecting position of the adjusting member 12 to the operation lever 4 and changing a distance between the turning fulcrum of the operation lever 4 and the sliding member 13, the setting number of the imparting positions P of the break feeling in the turning area of the operation lever 4 can be changed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pedal device for a sewing machine in which the number of control positions set in one continuous operation of an operation pedal can be set arbitrarily, and a knot feeling can be imparted every time the control pedal moves to each control position. .

  As shown in FIG. 5, the conventional pedal device 101 of the sewing machine is stepped on a foot pedal 102 that is swingably disposed near the table leg of the sewing machine table, and is connected to the foot pedal 102 via a connecting rod 106. The lever 103 is rotated about its rotation fulcrum, and the ball joint 104 incorporated in the lever 103 is engaged with a plurality of lock holes 105 arranged in the movement path so that the lever 103 By acting as a “multi-stage pedal” provided with a knot feeling imparting mechanism for giving a knot feeling (operating feeling) to a plurality of operation positions, and by turning the lever 103 corresponding to each lock hole 105, To generate a control signal for operating the peripheral device to sequentially execute a plurality of steps in the sewing operation of the sewing machine and to drive the peripheral device It had been made.

  As an example of a plurality of steps in the sewing work, that is, an example of a multi-stage operation of the pedal device, for example, in the edge stitch sewing machine, the first lock hole is operated by the stepping operation of the step pedal 102 (first stage). When the ball joint 104 is engaged with 105, a first switch signal is output from the pedal sensor (not shown) to the control unit, the large presser plate moves forward, and the next step (second step) is depressed. As a result, the ball joint 104 is engaged with the second lock hole 105 and a second switch signal is output, and the large presser plate is lowered. Further, by the stepping operation of the next one step (third step), the ball joint 104 is engaged with the third lock hole 105 and the third switch signal is output, the binder is lowered, and the next one step ( By the stepping operation of the fourth step), the ball joint 104 is engaged with the fourth lock hole 105 and the fourth switch signal is output, the flap presser pops out, and the next one step (fifth step) , The ball joint 104 is engaged with the fifth lock hole 105 and the fifth switch signal is output, the flap presser is lowered, and the last one step (sixth step) is pressed. The case where the ball joint 104 is engaged with the sixth lock hole 105 and the sixth switch signal is output, and sewing by the vertical movement of the sewing needle is started can be exemplified.

  In addition, a plurality of switches that are sequentially closed by a multi-step operation of a foot pedal are provided, and in accordance with the closing of the plurality of switches, the peripheral devices are sequentially operated to sequentially execute a plurality of steps in the sewing work of the sewing machine. An arrangement configured to do this has also been proposed (see Patent Document 1).

Japanese Patent No. 2679076

  However, in the conventional pedal device acting as a stepped pedal in this way, the knot feeling imparting position set for each pedal device is the same as the knot feeling imparting mechanism including the lock hole 105 and the ball joint 104 described above. Because it was mechanically fixed, for example, when the number of preparation steps before sewing in the sewing operation is different, the number of steps cannot be changed easily (especially, when changing to increase, lock holes are formed at different positions). However, there is a problem that it becomes an obstacle to productivity improvement.

  Accordingly, an object of the present invention is to provide a pedal device for a sewing machine that can easily change the number of imparted knot feelings and can improve productivity.

  To achieve the above object, the pedal device of the sewing machine according to claim 1 of the present invention is rotatably supported by a rotation fulcrum, and can be sequentially moved to a plurality of set control positions by operation of a foot pedal. An operation lever and a knot feeling imparting mechanism capable of imparting a knot feeling every time the operation lever moves to a predetermined control position, and the knot feeling imparting mechanism is connected to the operation lever by a connecting means. An adjusting member, a sliding member supported at the tip of the adjusting member, and a plurality of linear parallel grooves are formed, and the sliding members are engaged with the parallel grooves by the movement of the operation lever. A plate-like member arranged so as to slide across each of the parallel grooves, and adjusts the connection position of the adjustment member with respect to the operation lever, and the rotation fulcrum of the operation lever and the sliding member Changing the distance More, characterized in that it is possible to change the applied number of milestone feeling in rotation range of the operating lever.

  According to a second aspect of the present invention, there is provided a sewing machine pedal device comprising: a pinion that is pivotally supported by a rotation fulcrum and is rotated by an operation of a foot pedal; and a rack guide disposed on an outer periphery of the pinion. And a rack that is held between a rack guide while meshing with the pinion, and that can be sequentially moved to a plurality of set control positions as the pinion is rotated by operation of the foot pedal, and A knot feeling imparting mechanism capable of giving a knot feeling to each movement of the rack to a predetermined control position, wherein the knot feeling giving mechanism includes a plate-like member in which a plurality of linear parallel grooves are formed, and the rack And a sliding member that slides across each parallel groove while being engaged with each parallel groove by the movement of the rack, and the rack guide is swingable about the rotation axis of the pinion. To support A support member, and a fixing means for fixing the position of the support member with respect to the pinion, and the rack movement by changing the meshing position of the rack guide on the outer periphery of the pinion by the support member and the fixing means. It is possible to change the number of knot feelings in the area.

  In the pedal device of the sewing machine according to the first aspect, the sliding member supported by the adjustment member coupled to the operation lever is operated in parallel when the operation lever swings when the operator operates the foot pedal. A knot feeling generated by locking with the parallel groove when crossing the groove can be given to the operator via the operation lever, the connecting rod, and the foot pedal.

  Further, by adjusting the connection of the adjustment member to the operation lever and changing the distance between the rotation fulcrum of the operation lever and the sliding member, a sense of knot is provided in the rotation range (full stroke) of the operation lever. The number can be easily changed.

  That is, even if the rotation angle is the same, if the distance between the rotation fulcrum of the operation lever and the sliding member is adjusted to be long, a long rotation range can be obtained, and conversely, it becomes short. By adjusting to, a short rotation range can be obtained.

  Therefore, the connection of the adjustment member to the operation lever is adjusted so that a desired set number of parallel grooves for engaging the slide member are located in the rotation region, and the rotation fulcrum of the operation lever and the slide member are adjusted. It is possible to set an arbitrary number of steps (number of imparted knot feelings) by changing the distance to.

  In the pedal device for the sewing machine according to claim 2, when the operator operates the foot pedal, the connecting rod connected to the foot pedal moves downward. At this time, the pinion pivotally supported rotates with the rotation fulcrum as the connecting rod descends.

  By this rotation of the pinion, the rack held between the pinion and the rack guide moves forward in the direction in which the plate-shaped member is disposed, and the sliding member supported by the rack moves the plate-shaped member. A feeling of knots generated by locking with the parallel grooves when crossing the parallel grooves can be given to the operator via the pinion, the connecting rod, and the foot pedal.

  In addition, by adjusting the position of the rack guide with respect to the pinion and changing the holding angle of the rack to be advanced and retracted, the set number of control positions in the rack movement range (full stroke) can be easily changed.

  That is, if the crossing angle of the racks with respect to the uniformly arranged parallel grooves is adjusted, the number of intersecting parallel grooves can also be changed.

  Therefore, by adjusting the arrangement position of the rack guides so that a desired number of parallel grooves are located within the moving range and changing the crossing angle of the rack with respect to the parallel grooves, an arbitrary number of steps (giving a sense of knots) Number) can be set.

  The detection member is, for example, a variable resistor having a known configuration connected to a rotation shaft serving as a rotation fulcrum of the pinion, and is variable by the rotation of the rotation shaft in the variable resistor. By detecting the resistance value, it is possible to detect the control position where the operation lever or the rack has moved and to output a corresponding control signal.

  A first embodiment of a pedal device for a sewing machine according to the present invention will be described with reference to FIGS.

  The pedal device 1 of the sewing machine of the present embodiment acts as a so-called multi-stage pedal that starts an operation (drive) corresponding to each stage by a stepping operation divided into a plurality of stages of a foot pedal (not shown). The foot pedal is swingably disposed near the table leg of the sewing machine table.

  The front end of the foot pedal is connected to the lower end of a connecting rod 3 that can be displaced in the vertical direction. The upper end of the connecting rod 3 is connected to the substrate 12a of the adjusting member 12 connected to the operation lever 4 of the pedal control unit 5 disposed at the lower part of the sewing machine table.

  The operation lever 4 is formed in a substantially I shape, and is rotatable about one end of the case side of the pedal control unit 5 as a fulcrum, and is a highly accurate variable provided inside the case of the pedal control unit 5. It is connected to a resistor (not shown). The variable resistor acts as a detection member that outputs a control signal corresponding to the control position P to which the operation lever 4 has moved.

  Further, the operation lever 4 is supported by a spring 5 ′ provided on the side of the case of the pedal control unit 5 so as to be always urged upward, and is operated in a plurality of stages by operating the foot pedal. It is possible to move sequentially to the set control position P.

  The pedal device 1 of the sewing machine according to the present embodiment includes a knot feeling imparting mechanism 10 that can impart knot feeling to each movement of the operation lever 4 to the control position P.

  The knot feeling imparting mechanism 10 includes an adjusting member 12 connected to the operation lever 4 by a connecting means 11, a sliding member 13 supported at the tip of the adjusting member 12, and a plurality of linear parallel members. It consists of a plate-like member 15 in which a groove 14 is formed.

  Specifically, the adjustment member 12 includes a substrate 12a and an extension plate 12b. One end of the substrate 12a is fixed to the operation lever 4 with a fastener 16 such as a screw and extends to the other end. The outgoing plate 12b is connected so as to be able to change the amount of extension through a long hole 12c extending in the longitudinal direction. Further, as described above, the upper end of the connecting rod 3 is connected to the substrate 12a. A ball joint as a sliding member 13 is supported at the tip of the extension plate 12 b so as to face the parallel groove 14 of the plate-like member 15.

  The plate-like member 15 is engaged with the parallel groove 14 so that the sliding member 13 gives a feeling of knots to the operator through the operation lever 4 by the movement of the operation lever 4, and the parallel member 14. The pedal controller 5 is disposed on the side of the case so as to slide across the groove 14. The engagement point of the sliding member 13 on the parallel groove 14 is the control position P.

  In the knot feeling imparting mechanism 10 of this embodiment, the extension amount of the extension plate 12a of the adjustment member 12 with respect to the operation lever 4 is adjusted, and the distance between the rotation fulcrum of the operation lever 4 and the sliding member 13 is adjusted. By changing, the set number of control positions P in the rotation range (full stroke) of the operation lever 4, that is, the number of steps of the step pedal can be changed.

  That is, as shown in FIG. 2, even if the rotation angle is the same (20 ° in FIG. 2), the distance between the rotation fulcrum of the operation lever 4 and the sliding member 13 is adjusted to be long. A long rotation range can be obtained, and conversely, if the adjustment is made to shorten the rotation range, a short rotation range can be obtained. For example, in FIG. 2, on the locus indicated by the arrow A where the distance between the rotation fulcrum of the operation lever and the sliding member 13 is the shortest, the crossing position with the parallel groove 4 is the parallel groove 14. On the locus indicated by arrow B, the four control positions P that are the engagement points of the sliding member 13 can be secured, and the distance between the pivot point of the operating lever and the sliding member 13 is the longest. The eight control positions P can be secured. The sliding member 13 is engaged with the parallel groove 14 for each control, that is, for each step operation of the foot pedal, so that the feeling of the engagement is returned to the worker as a knot feeling to give a knot feeling. Can do.

  Thus, the connection of the extension plate 12b of the adjustment member 12 to the operation lever 4 is adjusted, the distance between the rotation fulcrum of the operation lever 4 and the sliding member 13 is changed, and a desired setting is set within the rotation range. Arranging the number of parallel grooves 14 makes it possible to easily set an arbitrary number of steps.

  For example, when performing control control of the six-stage sewing machine described in the conventional example, adjustment with respect to the operation lever 4 is performed so that a locus capable of securing six control positions P shown by an arrow C in FIG. What is necessary is just to adjust the connection of the extension board 12b of the member 12, and to change the distance of the rotation fulcrum of the operation lever 4, and the said sliding member 13. FIG.

  Next, a second embodiment of the pedal device 1 for a sewing machine according to the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same component as the pedal apparatus 1 of the said 1st Embodiment.

  In the pedal device 1 of the sewing machine according to the present embodiment, the lower end of a connecting rod 3 that can be displaced in the vertical direction is connected to the front end of the foot pedal that is swingably disposed near the table leg of the sewing machine table. . The upper end of the connecting rod 3 is connected to a connecting lever 21 fixed to the pinion 20 of the pedal control unit 5 disposed at the lower part of the sewing machine table, and the pinion 20 extends in the vertical direction of the connecting rod 3. Along with the displacement, it can be rotated by a rotation fulcrum, and is connected to a highly accurate variable resistor (not shown) provided inside the case of the pedal controller 5.

  The variable resistor acts as a detection member that outputs a control signal corresponding to the control position P to which the operation lever 4 has moved.

  A rack guide 23 that holds the rack 22 is disposed between the pinion 20 and the pinion 20 at a position substantially symmetrical to the position where the coupling lever 21 is disposed.

  The rack 22 is held between the rack guide 23 while meshing with the pinion 20 and is moved to the control position P set in a plurality of stages as the pinion 20 is rotated by the operation of the foot pedal. It can be moved sequentially.

  The pedal device 1 of the sewing machine according to the present embodiment includes a knot feeling imparting mechanism 30 that can give a knot feeling to each movement of the rack 22 to the control position P.

  The knot feeling imparting mechanism 30 includes a support member 25 that supports the rack guide 23 in a swingable manner about the rotation axis of the pinion 20, and a fixing (not shown) that fixes the position of the support member 25 with respect to the pinion 20. And a ball joint as a sliding member 27 supported at the tip of the rack 22 and a plate-like member 29 in which a plurality of linear parallel grooves 28 are formed.

  The plate-like member 29 is engaged with the parallel groove 28 by the movement of the rack 22 so that the sliding member 27 is engaged with the parallel groove 28 through the pinion 20 so as to give the operator a sense of knot. Is disposed on the side surface of the case of the pedal controller 5 so as to slide across. The engagement point of the sliding member 27 on the parallel groove 28 is the control position P.

  In the knot feeling imparting mechanism 10 of the present embodiment, the position of the rack guide 23 relative to the pinion 20 is adjusted by swinging the support member 25 and fixed by the fixing means, and the holding angle of the rack 22 that is moved forward and backward. Is changed, the set number of control positions P in the movement range (full stroke) of the rack 22, that is, the number of steps of the step pedal can be changed.

  That is, as shown in FIG. 4, if the crossing angle of the racks 22 that are advanced so as to cross the uniformly arranged parallel grooves 28 is adjusted, the number of parallel grooves 28 that cross each other can also be changed. it can. For example, in the present embodiment shown in FIG. 4, on the locus (arrow D) of the rack 22 held by the rack guide 23 disposed at the point D ′, the intersection position with the parallel groove 28 is present. Four control positions P that are the engagement points of the sliding member 27 on the parallel groove 28 can be secured, and on the track (arrow E) of the rack 22 held by the rack guide 23 disposed at the point E ′. The eight control positions P can be secured.

  Since the sliding member 23 engages with the parallel groove 28 for each control, that is, for each step operation of the pedal, the feeling of the engagement can be returned to the worker as a knot feeling to give a knot feeling. it can.

  In this way, the arrangement position of the rack 22 with respect to the pinion 20 is adjusted, the crossing angle between the forward / backward direction of the rack 22 and the parallel groove 28 is changed, and the desired number of parallel grooves 14 are positioned within the moving range. Thus, it is possible to easily set an arbitrary number of steps.

  For example, when performing control control of the six-stage sewing machine described in the conventional example, the arrangement position of the rack 22 with respect to the pinion is adjusted to the point F ′ so as to take the locus indicated by the arrow F in FIG. The crossing angle between the forward / backward direction of the rack 22 and the parallel groove 28 may be changed.

  Note that the processing in the variable resistor is the same as that in the first embodiment, and a description thereof will be omitted.

  As described above, the sewing pedal device 1 of the present embodiment can also easily change the number of imparted knots on the operation pedal, so that productivity can be greatly improved.

  In particular, according to the present embodiment, as shown in FIG. 4, the crossing path with respect to the parallel groove 28 of the rack 22 is a straight line. Stepped pedal operation can be performed.

The front view which shows the principal part structure of the pedal apparatus of the sewing machine which concerns on 1st Embodiment of this invention. Conceptual diagram of the method for changing the number of stages in the present embodiment The front view which shows the principal part structure of the pedal apparatus of the sewing machine which concerns on 2nd Embodiment of this invention. Conceptual diagram of the method for changing the number of stages in the present embodiment Explanatory drawing which shows the principal part structure of the conventional pedal device of a sewing machine

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pedal apparatus 3 Connecting rod 4 Operation lever 5 Pedal control part 5 'Spring 10 Knot feeling provision mechanism 11 Connection means 12 Adjustment member 12a Board | substrate 12b Extension board 12c Long hole 13 Sliding member 14 Parallel groove 15 Plate-like member 16 Fastener 20 Pinion 21 Connecting lever 22 Rack 23 Rack guide 25 Support member 27 Sliding member 28 Parallel groove 29 Plate member 30 Nodal feel imparting mechanism P Control position

Claims (2)

An operation lever that is rotatably supported by a rotation fulcrum and that can be sequentially moved to a plurality of set control positions by operating a foot pedal;
A nodal feel imparting mechanism capable of imparting a nodal feel for each movement of the operation lever to a predetermined control position;
With
The knot feeling imparting mechanism is
An adjusting member connected to the operation lever by connecting means;
A sliding member supported at the tip of the adjustment member;
A plate-like member formed with a plurality of linear parallel grooves and arranged to slide across the parallel grooves while the sliding members are engaged with the parallel grooves by the movement of the operation lever. And
By adjusting the connection position of the adjustment member with respect to the operation lever and changing the distance between the rotation fulcrum of the operation lever and the sliding member, the number of knot feelings provided in the rotation range of the operation lever can be changed. A sewing machine pedal device characterized by that. A pinion that is pivotally supported with a pivot point and pivoted by the operation of a foot pedal;
A rack guide disposed on the outer periphery of the pinion;
A rack that is held between a rack guide while meshing with the pinion, and that can be sequentially moved to a plurality of set control positions as the pinion rotates by operation of the foot pedal,
A knot feeling giving mechanism capable of giving a knot feeling every time the rack moves to a predetermined control position;
With
The knot feeling imparting mechanism is
A plate-like member in which a plurality of linear parallel grooves are formed;
A sliding member supported by the rack and sliding across the parallel grooves while being engaged with the parallel grooves by the movement of the rack;
A support member that supports the rack guide in a swingable manner about the rotation axis of the pinion;
Fixing means for fixing the position of the support member with respect to the pinion;
By changing the meshing position of the rack guide on the outer periphery of the pinion by the supporting member and the fixing means, the number of imparted knot feelings in the movement range of the rack can be changed. Pedal device.

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