JP2014208360A - Spring manufacturing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spring manufacturing machine which can arrange at a desired position a moving unit, moving a tool holder, in a short time by a simple configuration.SOLUTION: A spring manufacturing machine comprises: a quill 3 which guides a wire fed from a wire feed roller 2; a tool holder 6 which holds a bending die 60 (machining tool) for machining the wire into a spring; a plurality of moving units which move the tool holder 6 at the outlet of the quill 3; a support wall 1 which supports the moving units; a pivot 7 which is arranged on an axis of the quill 3 and in the support wall 1 and supports the moving units; and two positioning pins 8 (positioning members) which are arranged in the support wall 1 so as to be line-symmetrical with respect to the axis of the quill 3 and position the moving units. The plurality of moving units include a first moving unit 10 rotatably supported by the pivot 7, and a second moving unit 20 positioned to the support wall 1 by the positioning pin 8. The second moving unit 20 is detachably fixed to the support wall 1.

Description

  The present invention relates to a spring manufacturing machine that processes a wire fed from a wire feeding unit into a spring.

  A spring manufacturing machine that manufactures a coil spring processes a wire rod in contact with a processing tool into a coil spring. The spring manufacturing machine guides the wire sent from the wire feeding unit by a quill and makes it contact with the processing tool. The processing tool is held by a tool holder, and the tool holder is moved by a moving unit, and the relative position between the processing tool and the wire guided by the quill is adjusted (see, for example, Patent Document 1).

  Patent Document 1 discloses a coil spring manufacturing machine that holds two forming tools (processing tools) by means of upper and lower tool operating devices (moving units), respectively. The upper and lower tool actuators are supported on the front surface of the substrate (support wall) via upper and lower swing shafts, respectively. On the back side of the substrate, there are provided a main gear that rotates by a handle operation, and a driven gear that meshes with the main gear and is connected to the upper and lower swing shafts. By operating the handle, the upper and lower swing shafts rotate, and the upper and lower tool actuators rotate about the upper and lower swing shafts.

  By operating the handle, the upper and lower swing shafts rotate, and the upper and lower tool actuators rotate about the upper and lower swing shafts to produce a right-handed coil spring or left-handed position. The coil spring is moved to a position for manufacturing.

Japanese Patent No. 3819769

  However, in order to move to a position for manufacturing a right-handed coil spring or a position for manufacturing a left-handed coil spring, the handle must be operated for a long time. Also, the configuration for rotating the upper and lower tool actuators is complex. In addition, since the operation of the tool becomes simple, a coil spring may be manufactured using only one forming tool. In this case, the coil spring may come into contact with a tool operating device that moves another forming tool. There is.

  The present invention has been made in view of such circumstances, and in a simple configuration, a moving unit for moving a tool holder is arranged in a desired position in a short time and only one processing tool is used. Another object of the present invention is to provide a spring manufacturing machine that can prevent a spring from coming into contact with a moving unit that moves another processing tool.

  A spring manufacturing machine according to the present invention includes a wire rod feed roller that feeds a wire rod, a quill that guides the wire rod fed from the wire rod feed roller, a tool holder that holds a processing tool that processes the wire rod into a spring, In a spring manufacturing machine comprising a plurality of moving units that move the tool holder at the exit of the quill and a support wall that supports the moving unit, the support wall is disposed on the axis of the quill, The pivot unit supporting the moving unit, and the support wall are arranged in line symmetry with respect to the axis of the quill and include two positioning members for positioning the moving unit, and the plurality of moving units include: A first moving unit rotatably supported on the pivot; and a second moving unit positioned on the support wall by any one of the positioning members, The mobile unit Yes so as to be fixed to detachably said support wall, characterized in that you have to change the position of the pivot around in the first mobile unit.

  In the present invention, the first moving unit is rotated around the pivot to position the first moving unit. Further, of the two positioning members, either one of the positioning members is selected according to the case of manufacturing a left-handed or right-handed coil spring, and the second moving unit is positioned using the selected positioning member. , Detachably fixed to the support wall. If the second moving unit is removed from the support wall, the second moving unit can be positioned using the other positioning member. Even when only one processing tool is used (when only the first moving unit is used), the second moving unit is removed from the support wall, and the spring processed by the processing tool contacts the second moving unit. This can be prevented.

  The spring manufacturing machine according to the present invention is characterized in that the first moving unit is fixed to the support wall by a removable fixing member.

  In the present invention, according to the case of manufacturing a left-handed or right-handed coil spring, the first moving unit is released from being fixed to the support wall, and the first moving unit is rotated around the pivot to perform positioning. After that, the first moving unit is again detachably fixed to the support wall.

  The spring manufacturing machine according to the present invention includes a drive device that rotates the first moving unit.

  In the present invention, by using the drive device, the first moving unit supported by the pivot is easily and reliably positioned.

  The spring manufacturing machine according to the present invention is characterized in that the tool holding portion can be moved in a direction crossing the support wall.

  In the present invention, the tool holding portion is moved in the direction intersecting the support wall, the relative position between the processing tool and the wire is adjusted, and the initial tension of the coil spring is adjusted.

  In the spring manufacturing machine according to the present invention, the first moving unit is positioned by rotating the first moving unit about the pivot according to the case of manufacturing the left-handed or right-handed coil spring. be able to. Further, of the two positioning members, either one of the positioning members is selected according to the case of manufacturing a left-handed or right-handed coil spring, and the second moving unit is positioned using the selected positioning member. Detachably fixed to the support wall. If the fixing of the second moving unit is released, the second moving unit can be positioned using the other positioning member. Even when only one processing tool is used, the second moving unit can be removed from the support wall, and the spring processed by the processing tool can be prevented from coming into contact with the second moving unit. The user can easily position or remove the second moving unit from the support wall, and can finish the positioning or removing operation of the second moving unit in a short time. Moreover, positioning according to the case where a left-handed or right-handed coil spring is manufactured can be performed only by rotating the first moving unit about the pivot without largely moving on the support wall.

1 is a schematic front view of a spring manufacturing machine according to Embodiment 1. FIG. It is a figure which shows a 1st movement unit. It is explanatory drawing explaining the positioning operation | work of a 1st movement unit and a 2nd movement unit. It is a front view which shows the state which removed the 2nd movement unit from the support wall. It is explanatory drawing explaining the inclination-angle of a 1st movement unit and a 2nd movement unit. It is a figure which shows schematically the structure of the 1st movement unit in the spring manufacturing machine which concerns on Embodiment 2. FIG. It is a figure which shows schematically the structure of the 1st movement unit in the spring manufacturing machine which concerns on Embodiment 3. FIG.

(Embodiment 1)
Hereinafter, the present invention will be described in detail with reference to the drawings showing the first embodiment. FIG. 1 is a schematic front view of a spring manufacturing machine, and FIG. 2 is a diagram showing a first moving unit 10. 2A is a schematic front view of the first moving unit 10, and FIG. 2B is a schematic plan sectional view of the first moving unit 10. In the figure, reference numeral 1 denotes a support wall 1 of a spring manufacturing machine. On the front surface of the support wall 1, two pairs of wire rod feed rollers 2 are provided which are arranged above and below to feed the wire horizontally.

  On the rear side of the support wall 1, a bobbin (not shown) around which a wire to be supplied to the wire feeding roller 2 is wound is provided. The wire wound around the bobbin is supplied to the wire feed roller 2 via a pulley (not shown). On the upstream and downstream sides of the wire feed roller 2 located on the upstream side, wire guides 2a and 2a each having a groove portion through which the wire passes are provided in the center of the block. A quill 3 is provided on the downstream side of the wire feed roller 2 located on the downstream side.

  The quill 3 has a groove through which the wire passes in the axial center portion. The wire rod feed roller 2 is guided to the wire rod guides 2a and 2a by rotating the wire rod feed roller 2 positioned on the upper side counterclockwise and rotating the wire rod feed roller 2 positioned on the lower side clockwise. , Led to quill 3.

  Near the exit of the quill 3 is a wire processing space. Opposing the exit of the quill 3, the first moving unit 10 is disposed along the axis of the quill 3 (the feeding direction of the wire). The wire guided to the exit of the quill 3 is sent to the wire processing space and abuts against a bending die 60 (processing tool) attached to the tip of the first moving unit 10. The bending die 60 is provided with a substantially semicircular groove for guiding the wire in the vertical direction in order to ensure the bending of the wire, and the wire is desired depending on the angle and position of the bending die 60 with which it abuts. And the desired spring is wound.

  A cored bar 5 protruding forward from the support wall 1 is disposed at the exit of the quill 3, and a cutting tool slide having a cutter 4 at the end is disposed above the wire processing space. The cutting tool slide moves up and down along the guide rail (not shown) to the wire processing space 4, the cutter 4 sandwiches the wire between the core bar 5, and descends until the cutter 4 comes into sliding contact with the core bar 5. The wire is cut and the spring is cut off.

  On the axis of the quill 3, a pivot 7 projects forward from the support wall 1 on the opposite side of the quill 3 across the cutter 4. The pivot 7 rotatably supports the first moving unit 10 that moves the bending die 60.

  As shown in FIG. 2, the first moving unit 10 has a rectangular base plate 11, and a central portion of one end of the base plate 11 is rotatably supported by a pivot 7. An insertion hole (not shown) for inserting a fixing bolt 30 (fixing member) is provided in the edge portion of the base plate 11, and a female screw hole (not shown) is provided in the support wall 1 at a position corresponding to the insertion hole. Is provided.

  A rail 12 extending from one end to the center of the base plate 11 is provided on the base plate 11 along the longitudinal direction of the base plate 11. The rail 12 is provided with a slider 13, and a moving plate 14 is provided on the slider 13. On the moving plate 14, a tool holder 6 for holding a bending die 60 and a nut 15 are arranged in parallel. The nut 15 is located on the other end side of the base plate 11 with respect to the tool holder 6. A motor 16 is provided at the other end of the base plate 11. A ball screw 17 projecting toward one end of the base plate 11 is connected to the output shaft of the motor 16. The nut 15 is screwed into the ball screw 17.

  As the motor 16 rotates forward and backward, the nut 15 moves to one end side or the other end side of the base plate 11, and the tool holder 6 moves to one end side or the other end side of the base plate 11. The bending die 60 attached to the tool holder 6 can move while being in contact with the wire fed from the quill 3.

  With the other end of the base plate 11 being separated from the quill 3, a fixing bolt 30 is inserted into the insertion hole of the base plate 11 and screwed into the female screw hole to fix the base plate 11 to the support wall 1. . As shown in FIG. 1, the user can rotate the base plate 11 with the pivot shaft 7 as a fulcrum, incline it with a predetermined angle α with respect to the axis of the quill 3, and then fix the base plate 11 to the support wall 1 with bolts. .

  As shown in FIG. 1, two positioning pins 8 and 8 (positioning members) that are line-symmetric with respect to the axis of the quill 3 protrude forward from the support wall 1. Each of the two positioning pins 8 and 8 is located above and below the pivot 7 and slightly closer to the cutter 4 than the pivot 7. The second moving unit 20 is provided on one of the two positioning pins 8 and 8. Similar to the first moving unit 10, the second moving unit 20 includes a base plate 21, a rail 22, a slider (not shown), a moving plate 24, a nut 25, a motor 26, and a ball screw 27. A tool holder 6 is provided on the moving plate 24.

  The positioning pin 8 is fitted to one end of the base plate 21, and the second moving unit 20 is positioned. A fixing bolt 30 is removably screwed into the edge portion of the base plate 21 to fix the base plate 21 to the support wall 1. As shown in FIG. 1, the user can position the base plate 21 with the positioning pins 8, incline the base plate 21 by a predetermined angle β with respect to the axis of the quill 3, and then fix the base plate 21 to the support wall 1 with the fixing bolt 30. . Unlike the first moving unit 10, the base plate 21 of the second moving unit 20 does not rotate around the positioning pin 8.

  FIG. 3 is an explanatory diagram for explaining the positioning operation of the first moving unit 10 and the second moving unit 20. As shown in FIG. 1, the first moving unit 10 and the second moving unit 20 are arranged above the axis of the quill 3, and the inclination angle α of the first moving unit 10 is the inclination angle of the second moving unit 20. When it is smaller than β, a right-handed coil spring is formed. When manufacturing a left-handed coil spring, it is necessary to arrange | position the 1st moving unit 10 and the 2nd moving unit 20 below an axis line. In the case of manufacturing a left-handed coil spring, the inclination angle of the first moving unit 10 and the second moving unit 20 is opposite to that in the case of manufacturing a right-handed coil spring. The inclination angles of 10 and the second moving unit 20 are −α and −β, respectively.

  The user removes the fixing bolt 30 attached to the base plate 11 of the first moving unit 10 and rotates the first moving unit 10 downward with the pivot 7 as a fulcrum as shown by the arrow in FIG. Then, the positions of the female screw hole provided in the support wall 1 and the insertion hole provided in the base plate 11 are aligned, and the fixing bolt 30 is inserted into the insertion hole and screwed into the female screw hole. The first moving unit 10 is fixed to the support wall 1 below the axis. The female screw hole of the support wall 1 is provided at a position corresponding to the posture in which the first moving unit 10 is inclined at a predetermined angle with respect to the axis. For example, the inclination angle of the first moving unit 10 is −α (first moving unit 10 is set to be opposite in phase when 10 is fixed above the axis.

  The user removes the fixing bolt 30 attached to the base plate 21 of the second moving unit 20 and removes the second moving unit 20 from the upper positioning pin 8. The removed second moving unit 20 is attached to the lower positioning pin 8, the positions of the female screw hole provided in the support wall 1 and the insertion hole provided in the base plate 21 are aligned, and the fixing hole is fixed to the insertion hole. 30 is inserted and screwed into the female screw hole (see white arrow in FIG. 3). The second moving unit 20 is fixed to the support wall 1 below the axis. The female screw hole of the support wall 1 is provided at a position corresponding to the posture in which the second moving unit 20 is inclined at a predetermined angle with respect to the axis. For example, the inclination angle of the second moving unit 20 is −β (second moving unit The phase is set to be opposite to that when 20 is fixed above the axis.

  FIG. 4 is a front view schematically showing a state in which the second moving unit 20 is removed from the support wall 1. When the user uses the single bending die 60 to wind the spring, the user can remove the second moving unit 20 from the support wall 1 and use the first moving unit 10. At this time, the first moving unit 10 is attached to the support wall 1 so that the inclination angle of the quill 3 with respect to the axis is γ. The support wall 1 is provided with a female screw hole corresponding to the inclination angle γ. A fixing bolt 30 is screwed into the female screw hole, and the first moving unit 10 is fixed to the support wall 1.

  Also in this case, as shown by the arrow in FIG. 4, the fixing bolt 30 is removed, and the first moving unit 10 is rotated downward with the pivot 7 as a fulcrum, and is supported below the axis of the quill 3. It can be fixed to the wall 1. For example, the first moving unit 10 is fixed to the support wall 1 so that the inclination angle of the quill 3 with respect to the axis is −γ.

  When only the 1st movement unit 10 is used, both the right-handed coil spring and the left-handed coil spring can be manufactured, and also the spring which has a linear part can be manufactured. Examples of the spring having a straight portion include a spring having a straight portion at the end (a so-called legged spring) or an elliptic spring having a straight portion.

  FIG. 5 is an explanatory diagram for explaining the inclination angles of the first moving unit 10 and the second moving unit 20. 5A shows that the first moving unit 10 and the second moving unit 20 are arranged above the axis, and FIG. 5B shows that the first moving unit 10 and the second moving unit 20 are arranged below the axis. Indicates the case.

  The bending die 60 is provided with a semicircular cross-sectional groove that guides the wire in the vertical direction. In FIG. 4, A is the exit of the quill 3, H is an axis, and V is a line perpendicular to the axis. P1 indicates the center point of the bending die 60 moved by the first moving unit 10 when both the first moving unit 10 and the second moving unit 20 are used for manufacturing the spring, and L1 indicates that P1 moves. Indicates the power trajectory. P2 indicates the center point of the bending die 60 moved by the second moving unit 20 when both the first moving unit 10 and the second moving unit 20 are used for manufacturing the spring, and L2 indicates that P2 moves. Indicates the power trajectory.

  P3 indicates the center point of the bending die 60 that is moved by the first moving unit 10 when only the first moving unit 10 is used for manufacturing the spring, and L3 indicates the locus that P3 should move. L1-L3 is calculated | required according to the coil shape of the spring to wind. The angles formed by the obtained L1 to L3 and the line H are α to γ, respectively. The trajectories L1 to L3 are linear, and the angles α to γ are different angles.

  The first moving unit 10 and the second moving unit 20 are used to manufacture the spring, and only the first moving unit 10 is used to manufacture the spring. The locus of the center point of the die 60 is different for the following reason.

  When both the first moving unit 10 and the second moving unit 20 are used for manufacturing a spring, the wire is brought into contact with the bending dies 60 and 60 of the first moving unit 10 and the second moving unit 20, respectively, and the spring is wound. Therefore, the trajectory of the bending die 60 moved by the first moving unit 10 is obtained based on the position of the bending die 60 moved by the second moving unit 20.

  On the other hand, when only the first moving unit 10 is used for manufacturing the spring, the wire is brought into contact with the bending die 60 and the cored bar 5 moved by the first moving unit 10, and the spring is wound. The trajectory of the bending die 60 moved by the unit 10 is obtained based on the position of the core metal 5. That is, since the reference position for obtaining the trajectory is different, the trajectory of the central point of the bending die 60 moved by the first moving unit 10 is different in each case.

  The inclination angle α of the first moving unit 10 is preferably 10 to 40 degrees, for example, and more preferably 20 degrees. The inclination angle β of the second moving unit 20 is preferably, for example, 50 to 80 degrees, and more preferably 60 degrees. Moreover, when manufacturing a spring using only the 1st moving unit 10, as the inclination | tilt angle (gamma) of the 1st moving unit 10, 0-45 degree is preferable, for example, and it is still more preferable that it is 40 degree | times.

  The inclination angle γ tends to be approximately twice as large as the inclination angle α. This is because when both the first moving unit 10 and the second moving unit 20 are used to manufacture a spring, the upper and lower portions of the coil arc are supported by P1 and P2, but only the first moving unit 10 is supported. When the spring is manufactured by using, the central portion of the arc of the coil is supported by P3.

  In the spring manufacturing machine according to the first embodiment, the first moving unit 10 is rotated around the pivot 7 in accordance with the case where the left-handed or right-handed coil spring is manufactured, and the first moving unit is rotated. Ten positionings can be performed. Further, of the two positioning pins 8, 8, one of the positioning pins 8 is selected according to the case of manufacturing a left-handed or right-handed coil spring, and the second movement is performed using the selected positioning pin 8. The unit 20 is positioned and fixed to the support wall 1 in a detachable manner. If the fixing of the second moving unit 20 is released, the second moving unit 20 can be positioned using the other positioning pin 8. Further, the first moving unit 10 can be positioned according to the case of manufacturing a left-handed or right-handed coil spring by simply rotating it around the pivot 7 without moving it largely on the support wall 1. .

  When the left-handed or right-handed coil spring is manufactured, the fixing bolt 30 is removed and the first moving unit 10 is rotated around the pivot 7 for positioning, and then fixed to the first moving unit 10. The bolt 30 is attached and fixed to the support wall 1 so as to be detachable again. A left-handed or right-handed coil spring can be manufactured simply by changing the inclination angle of the first moving unit 10, and the first moving unit 10 can be moved to an appropriate position and fixed in a short time. .

  In addition, by providing two positioning pins 8 and 8 on the support wall 1 symmetrically with respect to the axis of the quill 3, the wire rod fed from the quill 3 can be produced in any of the left-handed and right-handed coil springs. After contacting the bending die 60 provided in the first moving unit 10, it contacts the bending die 60 provided in the second moving unit 20. That is, even if the positions of the first moving unit 10 and the second moving unit 20 on the support wall 1 are changed according to the manufacture of the left-handed and right-handed coil springs, the first moving unit 10 and the second moving unit 20 are used. The roles of the bending dies 60 provided in the same are the same.

  When the driving of the first moving unit 10 and the second moving unit 20 is controlled by a control unit (not shown), the control unit has a control program for executing the driving of the first moving unit 10 and the second moving unit 20. Is set. As described above, even if the positions of the first moving unit 10 and the second moving unit 20 on the support wall 1 are changed according to the manufacture of the left-handed and right-handed coil springs, the first moving unit 10 and the second moving unit 10 Since the role of each bending die 60 provided in the moving unit 20 is not changed, the amount of movement of the bending die 60 is the same in the manufacture of left-handed and right-handed coil springs. Therefore, a common control program can be used in the manufacture of left-handed and right-handed coil springs, and there is no need to create them separately.

  The drive control of both the first moving unit 10 and the second moving unit 20 is complicated, and in some cases, only the first moving unit 10 (only a single bending die 60) is used in order to simplify the configuration. There is a case. Moreover, only the 1st movement unit 10 is used also when manufacturing the spring containing a linear part. In these cases, it is possible to remove the second moving unit 20 from the support wall 1 and prevent the spring processed by the bending die 60 from coming into contact with the second moving unit 20. The user can easily remove the second moving unit 20 from the support wall 1 and can finish the removing operation of the second moving unit 20 in a short time.

  The pivot 7 and the positioning pin 8 are provided on the support wall 1, but may be provided on the first moving unit 10 and the second moving unit 20. In this case, a hole for inserting the pivot 7 and the positioning pin 8 is provided in the support wall 1.

  Further, the two second moving units 20, 20 may be provided above and below the axis of the quill 3. In this case, the user can manufacture a right-handed coil and a left-handed coil spring by simply replacing the second moving unit 20 and positioning the first moving unit 10 about the pivot 7. Can do. When the spring manufacturing machine is large, the work burden associated with the replacement of the second moving unit 20 is increased, but this work is reduced by providing the two second moving units 20 and 20 on the support wall 1 in advance. be able to.

(Embodiment 2)
Hereinafter, the present invention will be described with reference to the drawings showing a spring manufacturing machine according to a second embodiment. FIG. 6 is a diagram schematically showing the configuration of the first moving unit 10. 6A is a front view schematically illustrating the first moving unit 10, FIG. 6B is a side view schematically illustrating the first moving unit 10, and FIG. 6C is a front view schematically illustrating the first moving unit 10 rotated by a driving device. It is.

  A protruding portion 11 a that protrudes outward is provided at the central portion of the longitudinal edge portion of the base plate 11 in the first moving unit 10. A guide groove 11b for guiding a rotating shaft 55 described later is provided on the front surface of the protruding portion 11a. The guide groove 11 b is along the longitudinal edge of the base plate 11. A square ring-shaped member 56 is slidably fitted in the guide groove 11b.

  A driving device 50 for rotating the first moving unit 10 is provided in front of the support wall 1 below the first moving unit 10. The driving device 50 includes a motor 51, a ball screw 52 connected to the output shaft of the motor 51, and a nut 53 screwed into the ball screw 52. The axial length direction of the ball screw 52 is a direction intersecting the longitudinal edge of the base plate 11.

  The nut 53 is provided with a counter plate 54 that faces the front surface of the protruding portion 11a. The counter plate 54 is provided with a rotating shaft 55 that protrudes toward the guide groove 11b and is rotatable about an axis. The rotating shaft 55 is rotatably fitted to a ring-shaped member 56 that is slidably fitted to the guide groove 11b.

  As shown in FIGS. 6A and 6C, the nut 53 moves back and forth along the axial direction of the ball screw 52 by forward and reverse rotation of the motor 51. The rotating shaft 55 moves along the guide groove 11 b via the ring-shaped member 56, and a pulling or pressing force is applied from the rotating shaft 55 to the first moving unit 10. The first moving unit 10 rotates clockwise or counterclockwise about the pivot 7. The bending die 60 attached to the first moving unit 10 moves to the upper side or the lower side, and the relative position to the wire sent from the quill 3 is changed / adjusted in the vertical direction.

  In the spring manufacturing machine according to the second embodiment, the first moving unit 10 supported by the pivot 7 can be easily and reliably positioned by using the driving device 50. Further, the drive of the driving device 50 can be controlled by the control unit, and the position of the first moving unit 10 can be appropriately changed while the spring is being wound, so that an optimally shaped spring can be manufactured.

  For example, when a spring including a straight portion is manufactured using only the first moving unit 10, the first moving unit 10 is moved upward or downward to be separated from the wire. Thereby, the wire is not brought into contact with the bending die 60 and is sent out from the quill 3 in a straight line. Thereafter, the first moving unit 10 is moved downward or upward to come into contact with the wire to form a curved portion of the spring.

  Before the spring is manufactured, the first moving unit 10 may be positioned in advance by the driving device 50 and the first moving unit 10 may be fixed to the support wall 1 by the fixing bolt 30.

  Of the configurations according to the second embodiment, configurations similar to those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

(Embodiment 3)
Hereinafter, the present invention will be described with reference to the drawings showing a spring manufacturing machine according to a third embodiment. FIG. 7 is a diagram schematically showing the configuration of the first moving unit 10. 7A is a front view schematically showing the first moving unit 10, FIG. 7B is a plan view schematically showing the first moving unit 10, and FIG. 7C shows the movement of the first moving unit 10 in the direction intersecting the support wall 1. It is explanatory drawing demonstrated.

  A support plate 14 a protruding forward is provided on the moving plate 14 of the first moving unit 10. The support plate 14a is provided with an insertion hole 14b through which a second pivot 6a described later is inserted. The tool holder 6 has a second pivot 6a that vertically penetrates the tool holder 6. The second pivot 6a is rotatably inserted into the insertion hole 14b of the support plate 14a and is held by the support plate 14a. The tool holder 6 can be rotated around the second pivot 6a.

  In the tool holder 6, a fitting groove 6b into which an eccentric shaft 72 (to be described later) is fitted is provided closer to the nut 15 than the second pivot 6a. As shown in FIG. 7B, the fitting groove 6 b extends along the axis of the quill 3.

  As shown in FIG. 7A, a motor 71 is attached to the upper part of the moving plate 14 via an attachment plate 70 with the output shaft facing downward. An eccentric shaft 72 is connected to the output shaft of the motor 71 at a position deviated from the axis of the output shaft. The eccentric shaft 72 has a roller rotatable around the shaft, and the roller is fitted in the fitting groove 6 b of the tool holder 6.

  As shown in FIG. 7C, by the forward and reverse rotation of the motor 71, the eccentric shaft 72 presses the tool holder 6 forward or backward, and the tool holder 6 rotates clockwise or counterclockwise around the second pivot 6a. Rotate. The tool holder 6 approaches the support wall 1 or moves away from the support wall 1. In other words, the tool holder 6 moves in a direction intersecting the support wall 1. The bending die 60 attached to the tool holder 6 moves in the front-rear direction.

  Wires that are bent in contact with the bending die 60 are sequentially fed forward, and a coil spring is formed with the front-rear direction as the axial length direction. Therefore, the spring manufacturing machine according to Embodiment 3 adjusts the gap between the rings constituting the coil spring by adjusting the front and rear positions of the bending die 60, and in some cases makes the gap negative (the rings are pressed together). The force (initial tension) in the axial direction of the coil spring can be adjusted.

  In addition, a control program for controlling the driving of the motor 71 is stored in the control unit, and by driving the motor 71 based on the control program, a coil spring having a necessary initial tension can be reproduced and manufactured. it can.

  Of the configurations according to the third embodiment, configurations similar to those of the first or second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The technical features described in each embodiment can be combined with each other, and the scope of the present invention is intended to include all modifications within the scope of claims and the scope equivalent to the scope of claims. Is done.

DESCRIPTION OF SYMBOLS 1 Support wall 2 Wire rod feed roller 3 Quill 6 Tool holder 7 Pivot 8 Positioning pin (positioning member)
10 first moving unit 20 second moving unit 30 fixing bolt (fixing member)
50 Drive device 60 Bending die (processing tool)

A spring manufacturing machine according to the present invention includes a wire rod feed roller that feeds a wire rod, a quill that guides the wire rod fed from the wire rod feed roller, a tool holder that holds a processing tool that processes the wire rod into a spring, first and second moving unit for moving the tool holder at the outlet of the quill, the spring manufacturing machine and a support wall for supporting the first and second mobile unit, the guiding direction of the wire by the quill Yes by placement into the supporting wall on the extension of the outlet of the quill along a pivot axis for supporting said first moving unit rotatably, arranged on the support wall in line symmetry with respect to the previous SL extension Te Yes, the second and a two positioning members for positioning the mobile unit, the second mobile unit Citea to be positioned on the support wall by any of the positioning member The second mobile unit is Yes so as to be fixed to detachably said support wall, characterized in that you have to change the position of the pivot around in the first mobile unit.

Claims (4)

A wire feed roller for feeding the wire, a quill for guiding the wire sent from the wire feed roller, a tool holder for holding a processing tool for processing the wire into a spring, and the tool holder at the exit of the quill In a spring manufacturing machine comprising a plurality of moving units that move the moving unit and a support wall that supports the moving unit,
A pivot that is disposed on an axis of the quill at the support wall and supports the moving unit;
The support wall is arranged in line symmetry with respect to the axis of the quill, and includes two positioning members for positioning the moving unit,
The plurality of mobile units are:
A first moving unit rotatably supported on the pivot;
A second moving unit positioned on the support wall by any of the positioning members;
The second moving unit is detachably fixed to the support wall,
The position of the first moving unit around the pivot is changed. The spring manufacturing machine according to claim 1, wherein the first moving unit is fixed to the support wall by a removable fixing member. The spring manufacturing machine according to claim 1, further comprising a drive device that rotates the first moving unit. The spring manufacturing machine according to any one of claims 1 to 3, wherein the tool holding portion can be moved in a direction intersecting the support wall.

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