JP2008017923A - Button sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a button sewing machine capable of surely improving a performance by finely adjusting a vertical feed amount. <P>SOLUTION: In order to close an opening 8 formed at the position of a sewing machine frame 3 where the operation part 119 of a feed amount adjusting lever 114 is extended, a feed adjustment plate 13 is attached position adjustably in a direction parallel to the turning operation direction of the feed amount adjusting lever 114 through oblong holes 16 and 17 for attachment so that the operation part 119 is projected from a lever insertion hole 14 to the outside and turned. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a button sewing machine suitable for sewing a button to a sewing product while moving the button and the sewing product.

  2. Description of the Related Art Conventionally, a button-attached sewing machine that can sew a button to a workpiece is known. As such a conventional sewing machine with a button, a machine equipped with a vertical feed mechanism for moving the button and the sewing object in the front-rear direction along the longitudinal direction of the sewing machine bed is known (for example, see Patent Document 1). ).

  FIG. 3 shows a main part of a conventional button sewing machine, and the conventional button sewing machine 101 has a longitudinal feed mechanism 102. The longitudinal feed mechanism 102 has a cam shaft 103 that is rotated by transmission of rotation from a sewing machine main shaft (upper shaft) (not shown), and a feed cam 104 is attached to the cam shaft 103. . The feed cam 104 is formed so as to rotate once together with the cam shaft 103, for example, when the sewing machine main shaft makes one rotation in synchronization with the vertical movement of the sewing machine main shaft and the needle. The feed cam 104 has an annular cam groove 106 formed in the circumferential direction on the outer peripheral surface of a cam body 105 formed in a disc shape.

  Above the feed cam 104, a plate-like swing lever 108 formed in a substantially bell crank shape as a swing member is disposed. A bent portion 108a as a base end portion of the swing lever 108 is pivotally supported on the other end side of a fulcrum shaft 109 having one end fixed to the sewing machine bed 132 of the sewing machine frame 131 shown in FIG. . The swing lever 108 is a drive arm 110 having one arm formed in a flat plate shape with the bent portion 108a interposed therebetween, and a driven arm having guide portions 111a and 111a in which the other arm is formed in an arc shape. 111. A roller shaft 112 as a driven node is attached to the free end portion of the drive arm 110 with the tip thereof facing downward, and a cam roller (not shown) is disposed at the tip portion of the roller shaft 112. Yes. This cam roller is fitted in the cam groove 106 of the feed cam 104. Then, as the feed cam 104 rotates, the cam roller moves in the axial direction of the cam shaft 103 so that the swing lever 108 swings within a predetermined angle range centered on the fulcrum shaft 109. It has become.

  The follower arm 111 is connected to a feed amount adjusting lever 114 via a feed adjusting piece 113 which is movable along the longitudinal direction of the guide portions 111a and 111a. The feed amount adjusting lever 114 formed in a plate shape is rotatably attached to the lower surface of the substantially central portion in the longitudinal direction, and is engaged with the guide portions 111 a and 111 a of the driven arm 111.

  One end of the feed amount adjusting lever 114 shown on the left side in FIG. 3 is connected to a base end portion of a feed base 117 as a moving body disposed on the sewing machine bed 132 through a link 115a and a link 115b in this order. A connecting portion 116 is provided, and a proximal end portion of the presser lower plate 118 is attached to a distal end portion of the feed base 117 by screwing or the like. The guide portions 111a and 111a are formed in an arc shape centering on the connecting portion 116 at the sewing start position. Further, the other end of the feed amount adjusting lever 114 shown on the right side in FIG. 3 is an operation portion 119 operated manually. By operating this operation portion 119, the feed amount adjusting lever 114 is connected to the connecting portion 116. It can be rotated around the center. Further, at the side end of the intermediate portion between the feed adjustment piece 113 and the operation portion 119 of the feed amount adjustment lever 114, it is directed upward so as to be substantially orthogonal to the thickness direction along the longitudinal direction of the feed amount adjustment lever 114. The rib-shaped convex part 120 which protrudes in this way is formed. As a link, there is a configuration in which one link is used without using the two links 115a and 115b.

  As shown in FIG. 4, the operation portion 119 extends to the outside of the sewing machine frame 131 through a long lever insertion hole 122 provided in the feed adjustment plate 121. The feed adjusting plate 121 is screwed so as to close an opening (not shown) formed on the rear end side opposite to the needle arrangement side of the sewing machine frame 131, and is substantially horizontal in the attached state. It is arranged so as to extend. In addition, a plurality of notches 123 into which the convex portions 120 are detachably fitted are arranged at predetermined intervals on the upper surface of the lever insertion hole 122.

  The opening is for arranging the operation portion 119 of the feed amount adjustment lever 114 so as to protrude outside the sewing machine frame 131, and the operation portion 119 of the feed amount adjustment lever 114 of the sewing machine frame 131 extends. In the position.

  The sewing machine frame 131 includes a sewing machine bed 132 that is attached to a predetermined position on the sewing machine table, a sewing machine arm that extends in parallel with the sewing machine bed 132, and a sewing machine bed. It is formed in a substantially U-shape having a pillar portion 133 that connects 132 and the sewing machine arm on the rear end side opposite to the sewing machine head, which is the free end side of the sewing machine arm. And the needle | hook is arrange | positioned in the desired position of the lower surface of the sewing machine head of a sewing machine arm so that the longitudinal direction may turn up and down. As is known in the art, this needle has a base end attached to the lower end of the needle bar, and is rotatably disposed inside the sewing machine arm and interlocked with the rotation of the sewing machine main shaft that is driven to rotate by the sewing machine motor. The needle bar drive mechanism is capable of reciprocating with a predetermined stroke in the vertical direction. In addition, a well-known looper that moves in synchronization with the main spindle of the sewing machine and a thread trimming device are provided at the lower part of the sewing machine bed 132, and the sewing operation of single ring sewing is performed in cooperation with the needle and the looper. When a number of sewing operations are completed, the thread is cut by the thread trimming device.

  The swing lever 108, the feed adjustment piece 113, and the feed amount adjustment lever 114 are longitudinally along the longitudinal direction of the sewing machine bed 132 that extends parallel to the longitudinal direction of the sewing machine arm by the longitudinal feed mechanism 102. It constitutes a vertical feed amount adjustment mechanism for adjusting the feed amount. When the operation portion 119 of the feed amount adjustment lever 114 is pushed downward, the operation portion 119 and the convex portion 120 are elastically deformed downward and fitted. It comes off from the notch 123 which is carrying out. In this state, the operating portion 119 is rotated about the connecting portion 116 along the length direction of the lever insertion hole 122, and the convex portion 120 is positioned below the desired notch 123 disposed at a different position. Then, by releasing the force that pushes down the operation part 119 downward, the operation part 119 returns upward together with the convex part 120 so that the convex part 120 can be fitted with the notches 123 at different positions. It has become. In this way, by engaging the convex portion 120 with the notch 123 at a different position, the engagement position between the guide portions 111a and 111a of the driven arm 111 and the feed adjustment piece 113 from the fulcrum shaft 109 of the feed adjustment piece 113 is obtained. Even if the distance is changed and the swing lever 108 swings within the same angular range, the feed amount adjustment lever 114 and the feed amount of the feed base 117 according to the distance, that is, the longitudinal direction of the sewing machine bed 132 are met. The vertical feed amount can be changed.

  Further, since the feed amount adjusting lever 114 is connected to the moving body 117, if the moving body moves in the vertical direction by the rotational movement of the feed cam 104, the feed amount adjusting lever 114 also moves in the longitudinal direction. With the above-described configuration in which the convex portion 120 is fitted into the notch 123, the feed amount adjusting lever 114 can be held in a predetermined rotational position while being able to move in the longitudinal direction as the moving body 117 moves in the vertical direction. Will be.

Japanese Patent No. 2762695

  However, the conventional button sewing machine 101 has a problem that it cannot meet the recent demand for higher performance.

  That is, in the conventional button sewing machine 101, the vertical feed amount is adjusted by fitting the convex portion 120 to any one of the plurality of notches 123. The interval is set as the minimum adjustment unit of the vertical feed amount, and there is a problem that the vertical feed amount cannot be adjusted finer than the interval of the notches 123.

  Further, in the conventional button sewing machine 101, there is a problem that there is a limitation due to the strength of the convex portion 120 and the notch 123 and processing in order to make the interval between the notches 123 adjacent to each other fine (narrow).

  Therefore, there is a need for a button-attached sewing machine that can reliably achieve high performance by finely adjusting the vertical feed amount.

  The present invention has been made in view of this point, and an object of the present invention is to provide a button-attached sewing machine that can reliably achieve high performance by finely adjusting the vertical feed amount.

  In order to achieve the above-described object, the button sewing machine according to the present invention is provided with a vertical feed mechanism for moving the button and the sewing product, and the vertical feed mechanism includes a camshaft that can be rotated and driven. A feed cam attached to the cam shaft and having a cam groove formed on the outer periphery thereof, a moving body moved at least in the longitudinal direction along the longitudinal direction of the sewing machine bed by the rotational drive of the feed cam, and the movement at one end It has a connecting part connected to the body and an operating part extending from the sewing machine frame to the outside at the other end, and can be rotated around the connecting part and moved in the longitudinal direction by operating the operating part. The arm is fitted to the cam groove and swings with a feed amount adjusting lever configured to be able to hold a predetermined rotational position while being held between the base end portion rotatably supported by the sewing machine frame. Followers to be attached And the other arm has a bell crank-like swinging member which is a driven arm provided with an arcuate guide portion centered on the connecting portion, and the feed amount adjusting lever A feed adjustment piece that engages with the guide portion of the driven arm is rotatably attached to the longitudinal central portion of the driven arm, and the guide portion of the driven arm and the guide portion of the driven arm are rotated by a turning operation of the feed amount adjusting lever. In a button-attached sewing machine that can change the vertical movement amount by changing the engagement position with the feed amount adjusting piece, the feed position adjusting lever of the sewing machine frame is extended at the position where the operation portion extends. An opening for arranging the operation portion of the amount adjusting lever so as to protrude to the outside of the sewing machine frame and a feed adjusting plate for closing the opening are provided, and the feed adjusting plate includes the feed amount adjusting lever. Middle part of A long lever insertion hole that is inserted and formed so as to enable the rotation operation of the feed amount adjustment lever, in order to maintain the rotation position while allowing the movement of the feed amount adjustment lever in the longitudinal direction. A plurality of notches provided at intervals on the upper surface or the lower surface of the lever insertion hole and fitted with the feed amount adjusting lever, and extending in parallel along a rotation operation path of the feed amount adjusting lever. A long slot for attachment is provided, and the feed adjustment plate is attached to the opening so that the operation portion protrudes outside from the lever insertion hole and can be rotated. It is in the point which is attached so that position adjustment is possible through a long hole in the direction parallel to the rotation operation direction of the feed amount adjusting lever.

  At least one end of the rotation operation direction of the feed adjustment lever of the feed adjustment plate is used as an index, and at least the rotation operation direction of the feed adjustment lever at the attachment position of the feed adjustment plate of the sewing machine frame is used. On one end side, a scale finer than the interval between the plurality of notches for positioning the mounting position of the feed adjusting plate at a position indicated by the indicator is along a direction parallel to the rotation operation direction of the feed amount adjusting lever. It is preferable to be provided.

  Another feature of the sewing machine with a button according to the present invention is that it is provided with a vertical feed mechanism for moving the button and the sewing product. The vertical feed mechanism includes a cam shaft which can be driven to rotate, and the cam shaft. A feed cam having a cam groove formed on the outer periphery thereof, a movable body that is moved in the longitudinal direction at least along the longitudinal direction of the sewing machine bed by the rotational drive of the feed cam, and one end connected to the movable body. And has an operation portion extending from the sewing machine frame to the other end at the other end, and is operable to rotate about the connection portion and move in the longitudinal direction by operating the operation portion. A feed amount adjusting lever configured to be able to hold a rotating position, and a follower that swings with one arm fitted into the cam groove with a base end portion rotatably supported by the sewing machine frame interposed therebetween. With attached drive arm The other arm has a bell crank-like swinging member that is a driven arm provided with an arcuate guide portion centered on the connecting portion, and a longitudinal center portion of the feed amount adjusting lever The feed adjustment piece that engages with the guide portion of the driven arm is rotatably attached, and the guide portion of the follower arm and the feed amount adjustment piece are rotated by turning the feed amount adjustment lever. In the button-attached sewing machine that is capable of changing the vertical movement amount by changing the engagement position of the sewing machine, the operation amount of the feed amount adjustment lever is at the extended position of the operation portion of the feed amount adjustment lever of the sewing machine frame. A long lever insertion hole that penetrates the sewing machine frame so that the portion protrudes outside the sewing machine frame and allows the feed amount adjustment lever to be rotated, and is parallel to the lever insertion hole above the lever insertion hole. A long first guide slot extending through the sewing machine frame so as to extend, and a long second guide hole passing through the sewing machine frame so as to extend in parallel with the lever insertion hole below the lever insertion hole. A feed adjusting portion having a guide long hole is provided, and on the outside of the feed adjusting portion, a first insertion hole through which the operation portion of the feed amount adjusting lever is inserted, and the first or second guide long hole A first guide member having a through-hole through which an operation screw provided in a portion opposite to the insertion hole is inserted is disposed on the inner side of the feed adjustment portion on the side opposite to the operation portion of the feed amount adjustment lever A second guide member having a second insertion hole through which an end of the second insertion hole is inserted, and a screw hole into which the operation screw provided at a portion facing the first or second guide long hole is screwed. Of the first and second insertion holes At least one of them is provided with a locking portion into which the feed amount adjusting lever is fitted in order to enable the movement of the feed amount adjusting lever in the longitudinal direction and hold the rotation position thereof, The operation screw is inserted through the first insertion hole and the first or second guide long hole in this order in a state where the feed amount adjusting lever is fitted to the locking portion, and is screwed into the screw hole. Thus, the first and second guide members are attached to the feed adjusting portion so that the position of the first and second guide members can be adjusted in a direction parallel to the rotational operation direction of the feed amount adjusting lever.

  The first guide member is provided with an index for positioning the first and second guide members, and a scale indicating a vertical feed amount at a position indicated by the index is provided outside the feed adjusting unit. It is preferable that the feed amount adjusting lever is provided along a direction parallel to the rotating operation direction.

  According to the buttoned sewing machine of the present invention, the operation portion of the feed amount adjusting lever can be fixed at an arbitrary position of the lever insertion hole, so that the vertical feed amount can be finely adjusted. As a result, there are excellent effects such as the ability to reliably improve the performance by finely adjusting the vertical feed amount.

  The present invention will be described below with reference to embodiments shown in the drawings. Note that the same or corresponding components as those of the conventional one described above are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  FIG. 1 is an exploded perspective view showing a main part of a first embodiment of a button sewing machine according to the present invention.

  As shown in FIG. 1, the buttoned sewing machine 1 of the present embodiment has a sewing machine body 2 formed of a cycle sewing machine capable of executing at least single-ring sewing. In the sewing machine body 2, the upper left side in FIG. 1 is a front side FS which is a needle arrangement side (not shown), and the lower right side in FIG. 1 is a rear side BS opposite to the needle arrangement side.

  The sewing machine frame 3 of the sewing machine main body 2 has a sewing machine bed 4 attached at a predetermined position on a sewing machine table (not shown) and a drawing extending above the sewing machine bed 4 in parallel with the sewing machine bed 4 as conventionally known. Is formed in a substantially U-shape having a sewing machine arm and a pedestal 5 that connects the sewing machine bed 4 and the sewing machine arm at the rear BS on the opposite side of the sewing machine head, which is the free end side of the sewing machine arm. . The sewing bed 4 is formed with the longitudinal direction from the front FS to the rear BS as the longitudinal direction, and the longitudinal direction along the longitudinal direction of the sewing bed 4 is the longitudinal direction.

  The rear frame BS of the sewing machine frame 3, specifically the sewing machine bed 4, has a large lower base 6 in the left-right direction as viewed from the rear BS, and a narrow left-right width formed integrally with the upper portion of the lower base 6. The narrow upper base 7 is arranged so that the center portions in the left and right directions overlap in the vertical direction. That is, both sides in the left-right direction of the lower base 6 protrude so as to protrude outward from both ends in the left-right direction of the upper base 7. The rear end of the sewing machine bed 4 is formed such that the upper base 7 and the upper half of the lower base 6 are shorter than the lower half of the lower base 6, and the rear end surface 7 a of the upper base 7 and the upper half of the lower base 6 are formed. Is formed flush with the upper rear end surface 6a. Further, the lower rear end face 6b located in the lower half of the lower base 6 protrudes from the end face 7a of the upper base 7 and the upper rear end face 6a of the lower base 6 toward the rear BS.

  An opening 8 that is long in the left-right direction when viewed from the rear BS is provided on the end surface 7 a of the upper base 7 so as to communicate with the inside and outside of the sewing machine frame 3. An operation portion 119 (see FIG. 3) of a feed amount adjusting lever 114 that constitutes a part of the vertical feed mechanism 102 is disposed so as to extend from the opening 8 to the outside.

  That is, the opening 8 is formed so as to extend in parallel along the rotation operation path of the feed amount adjusting lever 114, and is along the longitudinal direction shown in the left-right direction when viewed from the rear BS of the opening 8. The length dimension is formed so as to exceed the rotation operation area of the feed amount adjusting lever 114 so that the feed amount adjusting lever 114 can be rotated.

  The opening 8 may be formed on the sewing machine frame 3 and is not particularly limited to the end surface 7a of the upper base 7 of the sewing machine bed 4 of the present embodiment.

  A clearance hole 9 is formed on the right side when viewed from the rear BS located below the opening 8 of the upper rear end surface 6a of the lower base 6. A screw hole (not shown) is formed at the bottom of the clearance hole 9. Has been. A pin hole 10 is formed on the left side when viewed from the rear BS located below the opening 8 in the upper rear end surface 6a of the lower base 6. Further, a screw hole 11 communicating with the pin hole 10 is formed in the vicinity of the rear BS on the side surface located on the left side when viewed from the rear BS of the lower base 6, and a set screw 12 is formed in the screw hole 11. Is detachably screwed.

  A feed adjusting plate 13 that closes the opening 8 is disposed on the rear side BS of the sewing bed 4. The dimension in the left-right direction, which is the rotational operation direction of the feed amount adjusting lever 114 of the feed adjusting plate 13, is substantially the same as the dimension in the left-right direction of the upper base 7. Further, the vertical dimension of the feed adjusting plate is substantially the same as the sum of the vertical dimension of the end surface 7a of the upper base 7 and the vertical dimension of the upper rear end surface 6a of the lower base 6. .

  A long lever insertion hole 14 penetrating in the thickness direction of the feed adjusting plate 13 is formed in a central portion of the feed adjusting plate 13, specifically, a portion facing the opening 8. The lever insertion hole 14 has a longitudinal direction formed along the longitudinal direction of the feed adjusting plate 13, and is the height direction of the sewing machine body 2 in the attached state in which the feed adjusting plate 13 is attached to the sewing machine frame 3. It is formed so as to extend in a substantially horizontal direction orthogonal to the vertical direction in FIG.

  That is, the lever insertion hole 14 is formed to extend in parallel along the rotation operation path of the feed amount adjustment lever 114 so that the rotation operation of the feed amount adjustment lever 114 can be performed. The lever insertion hole 14 is provided with a rib-like convex portion 120 formed at an intermediate portion between the rotation center of the feed amount adjusting lever 114 and the operation portion 119. Further, on the upper surface of the lever insertion hole 14, a plurality of notches 15 formed in a substantially rectangular shape in front of which the convex portion 120 of the feed amount adjusting lever 114 is detachably fitted are provided at predetermined intervals. Yes.

  In addition, the width dimension shown in the up-down direction of FIG. 1 of the lever insertion hole 14 is formed larger than the height dimension shown in the up-down direction of the convex portion 120. Furthermore, the dimension shown in the vertical direction of the opening 8 is formed larger than the dimension in the vertical direction at the portion where the convex portion 120 of the lever insertion hole 14 is formed.

  Further, when the convex portion 120 of the feed amount adjusting lever 114 is provided downward from the lower surface of the feed amount adjusting lever 114, a plurality of notches 15 are provided on the lower surface of the lever insertion hole 14.

  At the lower portions of both ends in the longitudinal direction of the feed adjusting plate 13, long mounting holes 16 and 17 that penetrate in the thickness direction are provided. These long mounting holes 16 and 17 are a pair of left and right, and are formed such that their longitudinal directions extend in parallel along the rotation operation path of the feed amount adjusting lever 114. That is, the feed adjusting plate 13 is arranged such that the longitudinal direction of the lever insertion hole 14 and the longitudinal direction of the attachment long holes 16 and 17 extend in parallel to each other.

  The mounting long holes 16 and 17 may be formed at positions other than the portion where the lever insertion hole 14 is formed, that is, a position where the mounting long holes 16 and 17 do not interfere with the lever insertion hole 14. The number may be 3 or more.

  An adjustment knob 18 is inserted into the right mounting slot 16 when viewed from the rear BS of the two mounting slots 16 and 17. The adjustment knob 18 is formed by arranging a columnar operation head portion 18a, a columnar stepped shaft portion 18b, and a male screw portion 18c in this order along the axial direction. The outer diameter dimension of the operation head 18a is set to be larger than the width dimension shown in the vertical direction of the long slot 16 for mounting, and the end face on the side opposite to the stepped shaft part 18b has a slot for rotational operation. Is formed. It is important to set the outer diameter of the operation head 18a so as not to contact the upper surface of the lower half of the lower base 6. Further, the outer diameter dimension of the step shaft portion 18 b is set to be slightly smaller than the dimension shown in the vertical direction of the attachment long hole 16 and to be smaller than the clearance hole 9. The length dimension of the step shaft portion 18b is shorter than the sum of the thickness dimension of the feed adjusting plate 13 and the depth dimension of the relief hole 9, that is, the end surface of the step shaft portion 18b located on the male screw portion 18c side. Is set so as not to contact the bottom of the escape hole 9. Further, the length dimension of the male screw portion 18c is set so that the tip of the male screw portion 18c does not come into contact with the bottom portion of the screw hole in a state where the tip is screwed into the screw hole formed at the bottom portion of the escape hole 9 and screwed.

  A guide pin 19 is inserted into the left mounting long hole 17 when viewed from the rear BS of the two mounting long holes 16 and 17. The guide pin 19 is formed by arranging a cylindrical pin head portion 19a and a cylindrical pin body portion 19b in this order along the axial direction. The outer diameter of the pin head portion 19a is set to be larger than the dimension shown in the vertical direction of the mounting elongated hole 17 and is set so as not to contact the upper surface of the lower half of the lower base 6. Further, the outer diameter of the pin main body 19b is smaller than that of the pin head 19a, is set slightly smaller than the dimension shown in the vertical direction of the long mounting hole 17, and is slightly smaller than that of the pin hole 10. Is set. The length dimension of the pin main body portion 19b is shorter than the dimension obtained by adding the thickness dimension of the feed adjusting plate 13 and the depth dimension of the pin hole 10, that is, the tip surface of the pin main body portion 19b is the pin hole 10's length. It is set not to touch the bottom. Further, the inner end of the screw hole 11 is set to face the intermediate portion of the pin main body portion 19b in a state where the pin main body portion 19b is inserted into the pin hole 10.

  An adjustment knob 18 is inserted into the right mounting slot 16, and the male screw portion 18 c of the adjustment knob 18 is screwed into a screw hole formed in the bottom of the escape hole 9, thereby allowing the mounting slot 16 to be stepped. The feed adjusting plate 13 is fixed between the operation head 18a and the upper rear end face 6a by fitting the portion 18b.

  By inserting a guide pin 19 into the left mounting elongated hole 17 and pushing the pin main body portion 19b of the guide pin 19 into the pin hole 10, the pin main body portion 19b is fitted into the mounting elongated hole 17 and the pin A feed adjusting plate 13 is arranged between the head 19a and the upper rear end face 6a. In addition, a slight gap is provided between the end surface 7a of the pin head portion 19b on the pin main body portion 19b side and the feed adjusting plate 13, and in this state, the set screw 12 is screwed into the screw hole 11 to The pin main body portion 19b is fixed to the sewing machine bed 4 by bringing the tip of the screw 12 into contact with the outer peripheral surface of the pin main body portion 19b.

  Accordingly, when the adjustment knob 18 is loosened, the feed adjustment plate 13 is attached to the mounting slot 16 using both the outer peripheral surface of the step shaft portion 18b of the adjustment knob 18 and the outer peripheral surface of the pin body 19b of the guide pin 19 as a guide. , 17, and by extension, can be slid in a parallel direction along the rotation operation path of the feed amount adjusting lever 114.

  In other words, the feed adjusting plate 13 is parallel to the direction of rotation of the feed amount adjusting lever 114 through the attachment long holes 16 and 17 so that the operating portion 119 protrudes from the lever insertion hole 14 and can be rotated. It is attached so that the position can be adjusted in any direction.

  Therefore, in the button-equipped sewing machine 1 of the present embodiment, an intermediate portion of the feed amount adjusting lever 114 is inserted into the extending position of the operation portion 119 of the feed amount adjusting lever 114 of the sewing machine frame 3, and the feed amount adjusting lever 114. A long lever insertion hole 14 formed so as to enable the rotation operation of the lever, and a lever insertion hole 14 to hold the rotation position while allowing the feed amount adjustment lever 114 to move in the longitudinal direction. A plurality of notches 15 provided at intervals on the upper surface and detachably fitted with the protrusions 120, and an attachment formed so as to extend in parallel along the rotation operation path of the feed amount adjusting lever 114 The feed adjustment plate 13 provided with the long holes 16 and 17 for feed is fed through the long slots 16 and 17 for mounting so that the operation portion 119 protrudes from the lever insertion hole 14 and can be rotated. Key It has a configuration which is positioned adjustably attached to the rotation operation direction parallel to the direction of the lever 114.

  A scale 20 for positioning (positioning) the attachment position of the feed adjustment plate 13 is operated to turn the feed amount adjustment lever 114 on the left side of the upper rear end surface 6a of the lower base 6 on the far side in FIG. Is provided along a direction parallel to the direction, and the mounting position of the feed adjusting plate 13 by extension of the right end of the feed adjusting plate 13 when viewed from the rear BS of the feed adjusting plate 13, and hence the operation amount of the feed adjusting lever 114. That is, the vertical feed amount can be known.

  Therefore, the right end of the feed adjustment plate 13 positioned on one end side in the rotation operation direction of the feed amount adjustment lever 114 is an index 21 for the scale 20.

  The scale 20 is formed in more detail than the intervals between the plurality of notches 15 so that the vertical feed amount can be further subdivided and adjusted from the intervals between the plurality of notches 15. The vertical feed amount can be adjusted more finely as the interval between the scales 20 is made finer. The scale 20 may be formed on the left side of the upper rear end surface 6a of the lower base 6, or on both the left and right sides.

  Other configurations such as the sewing machine body 2, the vertical feed mechanism 102, and the vertical feed amount adjustment mechanism are the same as those of the conventional button sewing machine, and thus detailed description thereof is omitted.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  In the buttoned sewing machine 1 of the present embodiment, when adjusting the vertical feed amount, first, as in the prior art, the operation portion 119 of the feed amount adjustment lever 114 is pushed downward to fit the convex portion 120. With the detachment from the notch 15, the operation portion 119 is moved along the length direction of the lever insertion hole 14, and the force that pushes the operation portion 119 downward is released after being positioned below the desired notch 15. By doing so, the operation part 119 returns upward together with the convex part 120, and the convex part 120 is fitted to the desired notch 15, thereby roughly adjusting the vertical feed amount.

  Next, when the adjustment knob 18 is loosened, the feed adjustment plate 13 is moved in a state where the convex portion 120 is fitted in the notch 15, and the outer peripheral surface of the step shaft portion 18 b of the adjustment knob 18 and the outer peripheral surface of the pin main body 19 b of the guide pin 19. These are used as guides along the length direction of the lever insertion hole 14, that is, in a direction parallel to the rotational operation direction of the feed amount adjusting lever 114 to be positioned at a desired position. As a result, the operation portion 119 of the feed amount adjusting lever 114 is steplessly positioned at an arbitrary position in the longitudinal direction of the lever insertion hole 14 that is parallel to the rotational operation direction of the feed amount adjusting lever 114. Thus, the vertical feed amount is finely adjusted.

  As in the prior art, since the feed amount adjusting lever 114 is connected to the moving body 117, if the moving body 117 moves in the vertical direction by the rotational movement of the feed cam 104, the feed amount adjusting lever 114 also moves in the longitudinal direction. However, with the configuration in which the convex portion 120 is fitted to the notch 15 described above, the feed amount adjusting lever 114 can move in the longitudinal direction along with the movement of the moving body 117 in the longitudinal direction, and can be rotated a predetermined time. The moving position can be held.

  At this time, the position after moving the feed adjusting plate 13 can be easily determined by the position of the index 21 with respect to the scale 20 in order to adjust the moving amount to be slid, that is, the vertical feed amount. The index 21 can be positioned between the scales 20.

  Thereafter, the adjustment knob 18 is screwed to fix the attachment position of the feed adjustment plate 13 (the position after the operation of the feed amount adjustment lever 114), thereby completing the adjustment of the vertical feed amount.

  Thus, according to the buttoned sewing machine 1 of the present embodiment, the feed adjusting plate 13 is provided via the attachment long holes 16 and 17 so that the operation portion 119 protrudes from the lever insertion hole 14 and can be rotated. As a result, the position can be adjusted in a direction parallel to the rotational operation direction of the feed amount adjusting lever 114 and the operation portion 119 of the feed amount adjusting lever 114 of the sewing machine frame 3 is attached so as to close the opening 8. Therefore, it is possible to easily adjust the vertical feed amount finer than the interval between the notches 15 without reducing the interval between the notches 15 adjacent to each other.

  Further, according to the button-equipped sewing machine 1 of the present embodiment, at least one end in the rotational operation direction of the feed amount adjustment lever 114 at the attachment position of the feed adjustment plate 13 is used as the index 21, and the feed adjustment of the sewing machine frame 3 is performed. At least one end side in the rotational operation direction of the feed amount adjustment lever 114 at the attachment position of the plate 13 is finer than the interval between the plurality of notches 15 for positioning the attachment position of the feed adjustment plate 13 at the position indicated by the index 21. Since the scale 20 is provided, fine adjustment of the vertical feed amount can be easily performed.

  Therefore, according to the buttoned sewing machine 1 of the present embodiment, high performance can be reliably achieved by finely adjusting the vertical feed amount.

  In addition, according to the buttoned sewing machine 1 of the present embodiment, the vertical feed amount can be easily finely adjusted as compared with the conventional sewing machine, which is excellent in usability.

  In the present embodiment, the convex portion 120 formed on the feed amount adjustment lever 114 is fitted to the notch 15, but the convex portion 120 is not formed on the feed amount adjustment lever 114, and the notch 15 The width may be formed larger than the length of the feed amount adjusting lever 114 in the width direction, and the feed amount adjusting lever 114 itself may be fitted into the notch 15.

  FIG. 2 is an exploded perspective view showing a main part of a second embodiment of the sewing machine with a button according to the present invention.

  As shown in FIG. 2, in the buttoned sewing machine 1 of the present embodiment, a feed adjusting unit 24 is provided on the sewing machine frame 3A of the sewing machine body 2A, more specifically, on the rear side BS of the sewing machine bed 4A. The feed adjusting unit 24 is configured to rotate the feed amount adjusting lever 114 so that the operation unit 119 of the feed amount adjusting lever 114 protrudes to the outside of the sewing machine frame 3A so that the feed amount adjusting lever 114 can be rotated. A long lever insertion hole 25 penetrating the sewing machine frame 3A in the thickness direction with the direction parallel to the operation direction as the longitudinal direction is provided. Above the lever insertion hole 25, a long first guide long hole 26 that penetrates the sewing machine frame 3 </ b> A in the thickness direction so as to extend in parallel with the lever insertion hole 25 is provided. Below the hole 25, a long second guide long hole 27 that penetrates the sewing machine frame 3 </ b> A in the thickness direction so as to extend in parallel with the lever insertion hole 25 is provided.

  Note that the feed adjusting portion 24 may be formed on the sewing machine frame 3A, and is not particularly limited to the rear BS of the sewing machine bed 4 of the present embodiment. Further, in FIG. 2, the feed adjusting portion 24 is schematically shown in a flat plate shape.

  The first and second guide members 28 and 29, which will be described later, are provided outside the feed adjusting portion 24, specifically, above the first guide slot 26 on the outer surface of the position where the feed adjusting portion 24 of the sewing machine frame 3A is disposed. In addition, a scale 20A for positioning the feed amount adjusting lever 114 is provided along the longitudinal direction of the first guide long hole 26.

  A first insertion hole 30 through which the operation portion 119 of the feed amount adjustment lever 114 is inserted, a first guide long hole 26, and the outside of the feed adjustment portion 24 (surface exposed to the outside of the sewing machine frame 3 </ b> A). The 1st guide member 28 formed in the vertically long rectangular flat plate which has the through-hole 32 by which the operation screw 31 provided in the opposing part is penetrated is arrange | positioned. A feed amount adjusting lever 114 is fitted on the upper surface of the first insertion hole 30 of the first guide member 28 so as to enable the feed amount adjusting lever 114 to move in the longitudinal direction while maintaining its rotational position. As a locking portion, a notch 15A to which the convex portion 120 of the feed amount adjusting lever 114 is always fitted is provided. When the convex portion 120 of the feed amount adjusting lever 114 is provided downward from the lower surface of the feed amount adjusting lever 114, the notch 15A is provided on the lower surface of the first insertion hole 30.

  The feed amount adjusting lever 114 is not provided with the convex portion 120, but the length in the width direction of the first insertion hole 30 is formed to be substantially the same width as the insertion portion of the first insertion hole 30 of the feed amount adjusting lever 114. The one insertion hole 30 itself may be a locking portion to which the feed amount adjusting lever 114 is fitted.

  A first guide hole 34 through which the guide pin 33 is inserted is provided at a portion of the first guide member 28 facing the second guide long hole 27. Furthermore, a linear index 21A extending in the vertical direction is provided above the position where the through hole 32 of the first guide member 28 is formed. The upper end of the indicator 21A is connected to the upper end of the first guide member 28, and the amount of operation of the feed amount adjusting lever 114, that is, the vertical feed amount, by visually checking which position of the indicator 21A is on the scale 20A. You can know. Therefore, the 1st guide member 28 is formed so that the upper end may be arrange | positioned so that it may be located just under the scale 20A. Further, the scale 20A is arranged along a direction parallel to the rotation operation direction of the feed amount adjusting lever 114.

  A second insertion hole 35 through which the end of the feed amount adjustment lever 114 opposite to the operation portion 119 is inserted inside the feed adjustment portion 24 (the surface on the inner side of the sewing machine frame 3A), and a first guide A second guide member 29 formed in a vertically long rectangular flat plate shape having a screw hole 36 into which an operation screw 31 provided at a portion facing the long hole 26 is screwed is disposed. Further, a second guide hole 37 through which the guide pin 33 is inserted is provided at a portion of the second guide member 29 facing the second guide long hole 27.

  The operation screw 31 is formed by arranging a columnar operation head 31a, a columnar step shaft portion 31b, and a male screw portion 31c in this order along the axial direction. The outer diameter of the operation head 31a is set to be larger than the diameter of the through hole 32, and a slit is formed on the surface opposite to the step shaft portion 31b. Further, the outer diameter dimension of the step shaft portion 31 b is set slightly smaller than the dimension shown in the vertical direction of the first guide long hole 26. The length dimension of the step shaft portion 31b is shorter than the dimension obtained by adding the thickness dimension of the feed adjusting portion 24 and the thickness dimension of the first guide member 28, that is, positioned on the male screw portion 31c side of the step shaft portion 31b. The end face is positioned inside the first guide slot 26 so as not to contact the second guide member 29. Further, the length dimension of the male screw portion 31 c is set so that the tip can be screwed into the screw hole 36 of the second guide member 29.

  The guide pin 33 is formed by arranging a cylindrical pin head portion 33a and a cylindrical pin body portion 33b in this order along the axial direction. The outer diameter dimension of the pin head 33 a is set larger than the diameter dimension of the first guide hole 34. Further, the outer diameter dimension of the pin main body 33 b is smaller than the pin head 33 a, slightly smaller than the dimension shown in the vertical direction of the second guide long hole 27, and slightly smaller than the inner diameter dimension of the second guide hole 37. Has been. Further, the length dimension of the pin main body portion 33b is longer than the sum of the thickness dimension of the first guide member member 28, the thickness dimension of the feed adjusting portion 24, and the thickness dimension of the second guide member 29, that is, The tip of the pin body portion 33 b is set so as to protrude from the second guide hole 37 of the second guide member 29. An inner hole of a cylindrical thrust collar 38 is attached to a portion of the pin main body portion 33b that protrudes from the second guide hole 37 of the second guide member 29, and from the radially outer side of the thrust collar 38. The thrust collar 38 is detachably fixed to the guide pin 33 by screwing the set screw 39 and bringing the tip of the set screw 39 into contact with the pin main body portion 33b.

  By inserting the operation screw 31 into the through hole 32 and screwing the male screw portion 31 c of the operation screw 31 into the screw hole 36, the first and second guide members 28 and 29 become the first guide length of the feed operation portion 119. The feed adjusting portion 24 is sandwiched and fixed between the holes 26.

  The pin body 33b of the guide pin 33 is inserted into the first guide hole 34 so that the tip of the pin body 33b of the guide pin 33 protrudes from the second guide hole 37, and the second guide member of the pin body 33b. 29, an inner hole of the thrust collar 38 is attached to a portion protruding from the second guide hole 37, and then a set screw 39 is screwed in from the radially outer side of the thrust collar 38, and the tip of the set screw 39 is connected to the pin body portion 33b. The first and second guide members 28 and 29 are fixed by sandwiching the feed adjusting portion 24 between the second guide long holes 27 of the feed adjusting portion 24. Note that a slight gap is provided between the first guide member 28 and the outer surface of the feed adjusting unit 24 and / or between the second guide member 29 and the inner surface of the feed adjusting unit 24.

  Therefore, when the operation screw 31 is loosened, the first and second guide members 28 and 29 use the first and second guide long holes 26 and 27 as a guide, and the longitudinal direction of the lever insertion hole 25, and thus the feed amount adjusting lever 114. It can be slid in a state where the attached posture is maintained in a parallel direction along the rotation operation path.

  That is, the first and second guide members 28 and 29 are attached so that their positions can be adjusted in a direction parallel to the rotation operation direction of the feed amount adjusting lever 114.

  The operation screw 31 and the guide pin 33 may be arranged upside down.

  Further, since other configurations such as the sewing machine body 2 and the vertical feed mechanism 102 are the same as those of the buttoned sewing machine 1 of the first embodiment described above, detailed description thereof will be omitted.

  According to the buttoned sewing machine 1A of the present embodiment having such a configuration, the same effects as those of the buttoned sewing machine 1 of the first embodiment described above can be obtained.

  That is, in the buttoned sewing machine 1A of the present embodiment, when adjusting the vertical feed amount, the first and second guide members 28, 29 are moved to the first and second guide members 28, 29 by moving the operation screw 31 after loosening the operation screw 31. The first and second guide elongated holes 26 and 27 are used as guides to move together with the operation screw 31 while maintaining the attached posture in a direction parallel to the rotational operation direction of the feed amount adjusting lever 114. At this time, since the convex portion 120 is fitted in the notch 15A, the operation portion 119 of the feed amount adjusting lever 114 moves in conjunction with the movement of the operation screw 31. The operation unit 119 of the feed amount adjusting lever 114 is operated. Then, the operation screw 31 is positioned at a desired position. As a result, the operation portion 119 of the feed amount adjusting lever 114 is steplessly positioned at an arbitrary position in the longitudinal direction of the lever insertion hole 25 that is parallel to the rotational operation direction of the feed amount adjusting lever 114. Thus, the vertical feed amount is adjusted.

  At this time, the mounting position after the first and second guide members 28 and 29 that move together with the operation screw 31 are moved can be easily determined by the position of the index 21A with respect to the scale 20A.

  Thereafter, the adjustment screw 31 is screwed in, and the attachment position of the first and second guide members 28 and 29 with respect to the feed adjustment portion 24 (the position after the operation of the feed amount adjustment lever 114) is fixed, thereby adjusting the vertical feed amount. Ends.

  As described above, according to the buttoned sewing machine 1 of the present embodiment, the first and second guide members 28 and 29 are attached so that their positions can be adjusted in a direction parallel to the rotation operation direction of the feed amount adjusting lever 114. Therefore, the operation portion 119 of the feed amount adjusting lever 114 can be fixed at an arbitrary position of the lever insertion hole 25. As a result, fine adjustment of the vertical feed amount can be easily performed.

  Further, according to the buttoned sewing machine 1 of the present embodiment, the first guide member 28 is provided with the index 21A for positioning the first and second guide members 28 and 29, and the feed adjusting unit 24 has On the outside, a scale 20A representing the vertical feed amount is provided at the position indicated by the index 21A. Therefore, fine adjustment of the vertical feed amount can be easily performed with a simple configuration in which the scale 20A is made fine.

  Therefore, according to the button sewing machine 1A of the present embodiment, high performance can be reliably achieved by finely adjusting the vertical feed amount.

  In addition, according to the buttoned sewing machine 1A of the present embodiment, the vertical feed amount can be easily finely adjusted as compared with the prior art, so that it is excellent in usability.

  Further, the present invention is not limited to the above-described embodiments, and various modifications can be made as necessary. For example, in the second embodiment described above, the notch 15A as the locking portion is formed in the first insertion hole 30, but the notch 15A as the locking portion may be formed in the second insertion hole 35. Also in this case, the feed direction adjusting lever 114 is not provided with the convex portion 15 </ b> A, and the length in the width direction of the second insertion hole 35 is made substantially the same as the insertion portion of the second insertion hole 35 of the feed amount adjustment lever 114. The first insertion hole 35 itself may be formed as a locking portion to which the feed amount adjusting lever 114 is fitted.

The disassembled perspective view which shows the principal part of 1st Embodiment of the sewing machine with a button which concerns on this invention. The disassembled perspective view which shows the principal part of 2nd Embodiment of the sewing machine with a button which concerns on this invention. A plan view showing the main part of a vertical feed mechanism of a conventional sewing machine with a button The perspective view which shows the operation part vicinity of the feed amount adjustment lever of the conventional sewing machine with a button

Explanation of symbols

1, 1A sewing machine with buttons 2, 2A sewing machine body 3, 3A sewing machine frame 4, 4A sewing machine bed 8 opening 13 feed adjusting plate 14, 25 lever insertion hole 15, 15A notch 16, 17 long slot 20, 20A scale 21, 21A Index 24 Feed adjustment part 26 1st guide long hole 27 2nd guide long hole 28 1st guide member 29 2nd guide member 30 1st insertion hole 31 Operation screw 32 Through-hole 35 2nd insertion hole 36 Screw hole 102 Vertical feed Mechanism 103 Cam shaft 104 Feed cam 106 Cam groove 108 Swing lever 110 Drive arm 111 Drive arm 112 Roller shaft 114 Feed amount adjustment lever 115a, 115b Link 116 Connection portion 117 Feed base 119 Operation portion 120 Projection portion FS Front side BS Rear side

Claims (4)

It is equipped with a vertical feed mechanism that moves the button and the workpiece.
The longitudinal feed mechanism includes a cam shaft that can be driven to rotate, a feed cam that is attached to the cam shaft and has a cam groove formed on the outer periphery thereof, and at least the longitudinal direction of the sewing machine bed by the rotational drive of the feed cam. A moving body that is moved vertically,
It has a connecting part connected to the moving body at one end and an operating part extended from the sewing machine frame to the other end, and can be rotated around the connecting part by operation of the operating part, and in the longitudinal direction A feed amount adjustment lever configured to be movable while being able to hold a predetermined rotational position;
One arm is fitted to the cam groove and swings with the driven end pivotally supported by the sewing machine frame, and the other arm is the connecting portion. And a bell crank-like swinging member that is a driven arm provided with an arcuate guide portion centered on
A feed adjustment piece that engages with the guide portion of the driven arm is pivotally attached to the central portion in the longitudinal direction of the feed amount adjustment lever,
In the button-attached sewing machine that can change the vertical movement amount by changing the engagement position between the guide portion of the driven arm and the feed amount adjustment piece by the turning operation of the feed amount adjustment lever.
An opening for disposing the operation part of the feed amount adjusting lever so as to protrude to the outside of the sewing machine frame at a position where the operation part of the feed amount adjusting lever of the sewing machine extends is closed. A feed adjustment plate is provided,
The feed adjusting plate is inserted with an intermediate portion of the feed amount adjusting lever so as to be able to rotate the feed amount adjusting lever. A plurality of notches that are provided at intervals on the upper surface or the lower surface of the lever insertion hole so as to be able to move in the direction and are fitted with the feed amount adjusting lever, and the feed amount A long slot for attachment formed so as to extend in parallel along the rotation operation path of the adjustment lever is provided,
Rotation operation direction of the feed amount adjustment lever through the attachment slot so that the feed adjustment plate can be rotated by the operation portion protruding to the outside from the lever insertion hole with respect to the opening. A sewing machine with a button, which is attached so that its position can be adjusted in a direction parallel to the button. At least one end of the rotation operation direction of the feed amount adjustment lever of the feed adjustment plate is an index,
At least one end in the rotational operation direction of the feed amount adjustment lever at the attachment position of the feed adjustment plate of the sewing machine frame, the plurality for positioning the attachment position of the feed adjustment plate at the position indicated by the index The button-equipped sewing machine according to claim 1, wherein a graduation finer than a notch interval is provided along a direction parallel to a rotation operation direction of the feed amount adjusting lever. It is equipped with a vertical feed mechanism that moves the button and the workpiece.
The longitudinal feed mechanism includes a cam shaft that can be driven to rotate, a feed cam that is attached to the cam shaft and has a cam groove formed on the outer periphery thereof, and at least the longitudinal direction of the sewing machine bed by the rotational drive of the feed cam. A moving body that is moved vertically,
It has a connecting part connected to the moving body at one end and an operating part extended from the sewing machine frame to the other end, and can be rotated around the connecting part by operation of the operating part, and in the longitudinal direction A feed amount adjustment lever configured to be movable while being able to hold a predetermined rotational position;
One arm is fitted to the cam groove and swings with the driven end pivotally supported by the sewing machine frame, and the other arm is the connecting portion. And a bell crank-like swinging member that is a driven arm provided with an arcuate guide portion centered on
A feed adjustment piece that engages with the guide portion of the driven arm is pivotally attached to the central portion in the longitudinal direction of the feed amount adjustment lever,
In the button-attached sewing machine that can change the vertical movement amount by changing the engagement position between the guide portion of the driven arm and the feed amount adjustment piece by the turning operation of the feed amount adjustment lever.
The operation part of the feed amount adjustment lever protrudes outside the sewing machine frame at the extended position of the operation part of the feed amount adjustment lever of the sewing machine frame so that the feed amount adjustment lever can be rotated. A long lever insertion hole penetrating the sewing machine frame, a long first guide elongated hole penetrating the sewing machine frame so as to extend in parallel with the lever insertion hole above the lever insertion hole, and the lever A feed adjusting portion having a long second guide slot extending through the sewing machine frame so as to extend in parallel with the lever insertion hole below the insertion hole;
An operation screw provided at a portion facing the first insertion hole through which the operation portion of the feed amount adjustment lever is inserted and the first or second guide long hole is inserted outside the feed adjustment portion. A first guide member having a through hole is disposed;
Inside the feed adjusting portion, a second insertion hole through which an end opposite to the operation portion of the feed amount adjusting lever is inserted is provided at a portion opposed to the first or second guide long hole. A second guide member having a screw hole into which the operation screw is screwed,
At least one of the first insertion hole and the second insertion hole is fitted with the feed amount adjusting lever so as to allow the feed amount adjusting lever to move in the longitudinal direction while maintaining its rotational position. There is a stop,
With the feed amount adjusting lever fitted to the locking portion, the operation screw is inserted through the first insertion hole and the first or second guide long hole in this order and screwed into the screw hole. Accordingly, the button adjusting sewing machine is characterized in that the first and second guide members are attached to the feed adjusting portion so that the position thereof can be adjusted in a direction parallel to a rotation operation direction of the feed amount adjusting lever. . The first guide member is provided with an index for positioning the first and second guide members,
The button according to claim 3, wherein a scale indicating a vertical feed amount is provided outside the feed adjustment unit along a direction parallel to a rotation operation direction of the feed amount adjustment lever. Attached sewing machine.

Images