JP2009039778A - Spring manufacturing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring manufacturing machine in which a core metal for cutting wire material formed into a spring is firmly fixed to a frame and can be quickly released from the frame. <P>SOLUTION: The core metal 5 is fitted into a through hole 1a formed in a front frame 1. In the through hole 1a, a first wedge member 40 is positioned on the core metal 5 side while a second wedge member 41 is on the front frame 1 side, with their tilted faces 40c and 41c contacted each other so that the tilted faces of the first wedge member 40 and the second wedge member 41 are tilted toward the opening side of the through hole 1a. A double acting air cylinder 60 to output power and a toggle mechanism 42 to amplify the power outputted by the double acting air cylinder 60 are installed. Then the double acting air cylinder 60 is connected to a main joint part 43 of the toggle mechanism 42, while the second wedge member 41 is to a driven joint part 45 of the toggle mechanism 42. Thus, small power is amplified by the toggle mechanism 42 and the amplified power actuates the second wedge member 41 to move the second wedge member 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spring manufacturing machine that can securely fix a core bar for cutting a wire processed into a spring to a frame, and can quickly release the fixing of the core bar to the frame.

  FIG. 8 is a schematic cross-sectional view of a conventional coiling spring manufacturing machine. A wire rod feed roller (not shown) for feeding a wire rod is provided on the front surface of the frame 100, the fed wire rod is brought into contact with a processing tool (not shown), coiled by a cored bar 102, and a molded spring The spring 101 is cut by using the core metal 102 as a receiving blade. The core metal 102 is disposed in a through-hole 100a provided in front of the frame 100. In order to fix the core metal 102 to the frame 100, the core metal 102 is interposed between the frame 100 and the core metal 102. A pair of wedge members are provided. The pair of wedge members includes a front wedge member 103 disposed in the front opening of the through hole 100a and a back wedge member 104 disposed in the rear opening of the through hole 100a. The front side wedge member 103 and the back side wedge member 104 are spaced apart from each other. The front-side wedge member 103 and the back-side wedge member 104 are provided on a rotating shaft 105 described later, and a male screw portion 105 a provided at one end of the rotating shaft 105 is screwed into the front-side wedge member 103. An internal thread portion 103a is provided, and an insertion hole 104a through which the rotary shaft 105 is inserted is formed in the back-side wedge member 104.

The rotating shaft 105 is inserted into the insertion hole 104a from the back side, and the male screw portion 105a is screwed into the female screw portion 103a. A spline 105b is provided at the other end of the rotary shaft 105, and a gear 115 is fitted to the spline 105b. The gear 115 and the spline 105b are relatively moved in the axial direction, and the gear 106 is engaged with the gear 115. The gear 106 is connected to a motor 107, and the rotational force of the motor 107 is transmitted to the rotating shaft 105 via the gear 106 and the gear 115, so that the rotating shaft 105 rotates forward or backward.
The front-side wedge member 103 and the back-side wedge member 104 are provided between the frame 100 and the cored bar 102, and the cored bar 102 is pressed against and fixed to the frame 100. The rotating shaft 105 is pivotally attached to the insertion hole 104a and is not moved relative to the rear wedge member 104 in the axial direction.

In the case where the pressure contact force of the back side wedge member 104 is smaller than the pressure contact force of the front side wedge member 103, and when the rotation shaft 105 rotates forward and backward, the rotation shaft 105 moves to the back side wedge member 104. At the same time, it moves to the front side or the back side along the spline 105b, and the pressure contact force of the front side wedge member 103 is smaller than the pressure contact force of the back side wedge member 104. Alternatively, when reversely rotated, the front-side wedge member 103 moves to the front side or the back side along the axis of the rotation shaft 105.
When the front-side wedge member 103 and the back-side wedge member 104 move and the core metal 102 is tightened to the frame 100, the core metal 102 is tightened and fixed, and the worn core metal 102 is replaced. When the cored bar 102 is replaced with a cored bar corresponding to the specifications of the spring to be manufactured, the fixing of the cored bar 102 to the frame 100 is released (see Patent Document 1).
JP-A-11-267781

  In the conventional spring manufacturing machine, the rotational force of the motor 107 is amplified by the front wedge member 103 and the back wedge member 104 and is applied to the core metal 102 to fix the core metal 102 to the frame 100. However, since the rotational force of the motor 107 is amplified only by the wedge member, it cannot be said that the rotational force is sufficiently amplified. Further, since a member for amplifying the rotational force of the motor 107 is not provided between the wedge member and the motor 107, it is necessary to cause the motor 107 to generate a strong rotational force when the wedge member is moved. It was.

  The present invention has been made in view of such circumstances, so that a cored bar is fitted into a through hole provided in a frame, and the inclined surface of the wedge member is inclined toward the opening of the through hole. The wedge members are arranged on the core metal side and the frame side with the inclined surfaces in contact with each other, a drive source for applying power to the wedge member, and the power of the drive source is amplified and applied to the wedge member. By providing a power amplifying mechanism, even when the power of the drive source is small, the power amplifying mechanism amplifies and the amplified power is applied to the wedge member so that the wedge member is opened in the through hole. And adjust the ratio of the wedge member in the space of the through hole to firmly fix the cored bar to the frame, or quickly fix the cored bar to the frame Spring making machine that can be released An object of the present invention is to provide.

  In addition, when a power amplifying mechanism including a toggle mechanism is provided, the drive source is connected to a main drive node of the toggle mechanism, and the wedge member is connected to a follower node of the toggle mechanism, the power of the drive source is small. Even so, the toggle mechanism changes the direction of the power to amplify the power, the amplified power is applied to the wedge member, the wedge member is moved toward the opening of the through hole, and the penetration A spring manufacturing machine capable of adjusting the ratio of the wedge member in the space of the hole to firmly fix the cored bar to the frame, or to quickly release the fixing of the cored bar to the frame The purpose is to provide.

  Also, by providing a lever member for connecting the drive source and the main drive node, the power of the drive source is amplified by the lever member, and the power of the drive source is further amplified by the toggle mechanism, and the drive source Even when the power of the through hole is small, the amplified power is applied to the wedge member, the wedge member is moved toward the opening of the through hole, and the ratio of the wedge member in the space of the through hole is determined. It is an object of the present invention to provide a spring manufacturing machine that can adjust and firmly fix the cored bar to the frame, or can quickly release the fixing of the cored bar to the frame.

  In addition, the one end has a long hook connecting the drive source and a short hook provided at the other end of the long hook, and the other end is pivoted. The lever member is provided, and the short rod portion is connected to the end of the main drive node, whereby the power of the drive source is amplified by the lever member, and the power of the drive source is further increased by the toggle mechanism. Even when the power of the driving source is small, the amplified power is applied to the wedge member, and the wedge member is moved toward the opening of the through-hole to enter the space of the through-hole. Provided is a spring manufacturing machine that adjusts the ratio of the wedge member to occupy and firmly fixes the cored bar to the frame or quickly releases the fixing of the cored bar to the frame. With the goal.

  In addition, by arranging the elongate hook portion close to the main drive node, the lever member and the toggle mechanism are arranged in the existing space on the back side of the frame, and the spring manufacturing machine can avoid an increase in size. The purpose is to provide.

  Also, by providing a double-acting air cylinder having a rod on one side, when the pressure in the cylinder chamber on the side not having the rod is high, a tensile force is applied to the wedge member to It is an object of the present invention to provide a spring manufacturing machine capable of quickly releasing the fixation of gold to the frame.

  A spring manufacturing machine according to a first aspect of the present invention includes a frame having a through hole, a core metal that is fitted in the through hole and cuts a wire processed into a spring, and the through hole. In a spring manufacturing machine provided between the cored bar and the frame, and comprising a plurality of wedge members for fixing the cored bar to the frame, and a drive source for applying power to the wedge member, the plurality of wedge members The wedge members are arranged on the metal core side and the frame side, respectively, so that the inclined surfaces thereof are inclined toward the opening of the through hole, and either wedge member is disposed on the opening of the through hole. And a power amplifying mechanism that amplifies the power of the drive source and acts on the wedge member by adjusting the ratio of the wedge member in the space of the through hole. It is characterized by that.

  In the present invention, a metal core is fitted into a through hole provided in a frame, and the wedge member is brought into contact with each other so that the inclined surface of the wedge member is inclined toward the opening of the through hole. Are disposed on the core metal side and the frame side, respectively, and a drive source that applies power to the wedge member and a power amplification mechanism that amplifies the power of the drive source and applies the power to the wedge member are provided. Even when the power of the source is small, the power is amplified by the power amplification mechanism, the amplified power is applied to the wedge member, the wedge member is moved toward the opening of the through hole, and The ratio of the wedge member in the space is adjusted.

  The spring manufacturing machine according to a second aspect of the invention is characterized in that the power amplifying mechanism includes a main drive node connected to the drive source, and a follower link connected to the main drive node and connected to the wedge member. It has a toggle mechanism that amplifies the power by changing the direction of action of the power of the source.

  In the present invention, a power amplifying mechanism including a toggle mechanism is provided, the drive source is connected to the main drive node of the toggle mechanism, and the wedge member is connected to the follower node of the toggle mechanism, whereby the power of the drive source is Even when the power is small, the toggle mechanism changes the direction of the power to amplify the power, and the amplified power is applied to the wedge member to move the wedge member toward the opening of the through hole. And adjusting the ratio of the wedge member to the space of the through hole.

  A spring manufacturing machine according to a third aspect of the present invention includes an insulator member that connects the drive source and the main drive node.

  In the present invention, by providing a lever member that connects the drive source and the main drive node, the power of the drive source is amplified by the lever member, and the power of the drive source is further amplified by the toggle mechanism. Even when the power of the drive source is small, the amplified power is applied to the wedge member, the wedge member is moved toward the opening of the through hole, and the wedge occupies the space of the through hole. Adjust the proportion of members.

  In the spring manufacturing machine according to a fourth aspect of the present invention, the lever member has a long hook portion connecting the drive source to one end portion thereof, and a short hook portion provided at the other end portion of the long hook portion, The other end portion is pivoted about a fulcrum, and the short rod portion is connected to an end portion of the main knot.

  In this invention, it has a long hook part which connects the said drive source in the one end part, and a short hook part provided in the other end part of this long hook part, and it rotates on the said other end part as a fulcrum The lever member is provided, and the short rod portion is connected to the end of the main drive node, whereby the power of the drive source is amplified by the lever member, and the toggle mechanism Even when the power is further amplified and the power of the drive source is small, the amplified power is applied to the wedge member, and the wedge member is moved toward the opening of the through hole. The ratio of the wedge member in the space is adjusted.

  The spring manufacturing machine according to a fifth aspect of the present invention is characterized in that the elongated flange portion is disposed close to the main drive node.

  In the present invention, the lever member and the toggle mechanism are arranged in an existing space on the back side of the frame by arranging the long rod part close to the main drive node.

  In the spring manufacturing machine according to a sixth aspect of the invention, the drive source includes a double-acting air cylinder provided with a rod on one side thereof, and when the cylinder chamber on the side where the rod is not provided becomes a high pressure, A tensile force is applied to the wedge member.

  In the present invention, by providing a double-acting air cylinder having a rod on one side, a tensile force is applied to the wedge member when the pressure in the cylinder chamber on the side where the rod is not provided becomes high. .

  In the spring manufacturing machine according to the first aspect of the present invention, the cored bar is fitted into the through hole provided in the frame, and the slope of the wedge member is inclined toward the opening of the through hole. The wedge member is arranged on the core metal side and the frame side with the inclined surface in contact with each other, a drive source that applies power to the wedge member, and power amplification that amplifies the power of the drive source and acts on the wedge member By providing a mechanism, even when the power of the drive source is small, the power is amplified by the power amplification mechanism, and the amplified power is applied to the wedge member so that the wedge member is opened in the through hole. And adjust the ratio of the wedge member in the space of the through hole to firmly fix the cored bar to the frame, or quickly fix the cored bar to the frame It can be canceled.

  In the spring manufacturing machine according to the second aspect of the present invention, a power amplifying mechanism including a toggle mechanism is provided, the drive source is connected to the main drive node of the toggle mechanism, and the wedge member is connected to the driven node of the toggle mechanism. Thus, even when the power of the drive source is small, the toggle mechanism converts the direction of the power to amplify the power, and the amplified power is applied to the wedge member so that the wedge member is Move toward the opening of the through hole and adjust the ratio of the wedge member in the space of the through hole to firmly fix the cored bar to the frame, or the cored bar to the frame Fixing can be released quickly.

  In the spring manufacturing machine according to the third aspect of the present invention, by providing a lever member that connects the drive source and the main drive node, the power of the drive source is amplified by the lever member, and the drive is performed by the toggle mechanism. The power of the source is further amplified, and even when the power of the drive source is small, the amplified power is applied to the wedge member to move the wedge member toward the opening of the through hole, and By adjusting the ratio of the wedge member in the space of the through hole, the cored bar can be firmly fixed to the frame, or the cored bar can be quickly fixed to the frame.

  In the spring manufacturing machine according to the fourth aspect of the present invention, the spring manufacturing machine has a long hook portion that connects the drive source to one end portion thereof, and a short hook portion that is provided at the other end portion of the long hook portion. By providing a lever member that is adapted to rotate with the end portion as a fulcrum, and by connecting the short rod portion to the end portion of the main drive node, the power of the drive source is amplified by the lever member, The power of the drive source is further amplified by a toggle mechanism, and even when the power of the drive source is small, the amplified power is applied to the wedge member so that the wedge member is placed in the opening of the through hole. To adjust the ratio of the wedge member occupying the space of the through hole to fix the cored bar firmly to the frame, or to quickly release the fixing of the cored bar to the frame can do.

  In the spring manufacturing machine according to the fifth aspect of the present invention, the lever member and the toggle mechanism are disposed in the existing space on the back side of the frame by disposing the long flange portion close to the main drive node. The enlargement can be avoided.

  In the spring manufacturing machine according to the sixth aspect of the present invention, when a double-acting air cylinder having a rod on one side is provided, when the cylinder chamber on the side on which the rod is not provided becomes a high pressure, By applying a tensile force to the wedge member, the fixing of the cored bar to the frame can be quickly released.

(Embodiment 1)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a spring manufacturing machine according to a first embodiment. FIG. 1 is a schematic enlarged front view of a spring manufacturing machine.

  In the figure, reference numeral 1 denotes a front frame of a spring manufacturing machine, and a pair of upper and lower wire rod feed rollers 2 for horizontally feeding a wire rod W are provided on the front surface of the front frame 1. A bobbin (not shown) wound with the wire W is provided on the back side of the front frame 1, and the wire W wound around the bobbin is supplied to the wire feed roller 2 via a pulley (not shown). Three wire guides 3a, 3b, and 3c provided with a groove portion through which the wire W passes in the center of the block are provided on the upstream, middle stream, and downstream of the wire feed roller 2, respectively. The wire rod feed roller 2 is configured such that the wire rod feed roller 2 positioned on the upper side rotates counterclockwise and the wire rod feed roller 2 positioned on the lower side rotates clockwise so that the wire rod W passes through the wire rod guide 3a. Then, it is guided to the wire feed roller 2 and passes through the middle wire guide 3b to the downstream wire guide 3c.

  Near the exit of the wire guide 3c is a wire processing space 4, and a first bending die mounting slide 10 is disposed along the feed direction of the wire W facing the exit of the wire guide 3c. . The wire W guided to the outlet of the wire guide 3c is sent to the wire processing space 4 and abuts on a bending die 12 attached to the wire processing space 4 side of the first bending die mounting slide 10. The bending die 12 is provided with a groove for guiding the wire W upward to ensure the bending of the wire W, and the wire W has a desired shape depending on the angle and position of the bending die 11 that abuts. A desired spring is wound by bending in the direction.

  In the vicinity of the outlet of the wire guide 3c, a through-hole 1a (see FIG. 2 described later) is opened in front of the front frame 1. A cored bar 5 is disposed in the through hole 1 a, and the cored bar 5 protrudes toward the wire processing space 4. A cutting tool slide 7 having a cutter 6 at the end is disposed above the wire processing space 4. The cutting tool slide 7 moves up and down along a guide rail (not shown) to the wire processing space 4, the cutter 6 sandwiches the wire W between the metal core 5, and the cutter 6 descends, The wire W is cut and the spring is cut off.

A guide rail (not shown) is provided on the front line of the front frame 1 on an extension line that is virtually drawn along the wire W passing through the wire guides 3a, 3b, and 3c. The first bending die mounting slide 10 is provided on the guide rail, and the bending die 12 is mounted on the wire processing space 4 side of the first bending die mounting slide 10. A ball screw mechanism 11 is connected to the side opposite to the processing space 4.
By the ball screw mechanism 11, the first bending die mounting slide 10 slides on the guide rail, advances and retracts along the extension line, and the bending die 12 advances and retracts with respect to the wire processing space 4. .

A guide rail (not shown) is provided on the front surface of the front frame 1 along a direction inclined at an acute angle with respect to the extension line. A second bending die mounting slide 20 is provided on the guide rail. A bending die 22 is attached to the wire bending space 4 side of the second bending die attachment slide 20, and a ball screw mechanism 21 is opposite to the wire bending space 4 of the second bending die attachment slide 20. Are connected.
By the ball screw mechanism 21, the second bending die mounting slide 20 advances and retracts along a direction inclined at an acute angle with respect to the extension line, and the bending die 22 advances and retracts with respect to the wire processing space 4.

2 is an enlarged side sectional view taken along line II-II in FIG. 1 in a state where the core metal is fixed, and FIG. 3 is a schematic view taken along line III-III in FIG. FIG. 4 is an explanatory view of a spring manufacturing machine for explaining the fixing and releasing of the cored bar.
A metal core holder 5a is provided around the metal core 5, and a first wedge member 40 is provided below the metal core holder 5a. The first wedge member 40 is a block including a bottom surface 40a, an end surface 40b substantially perpendicular to the bottom surface 40a, and an inclined surface 40c connected to the end surface 40b and the bottom surface 40a, and has a right triangle shape in side view. An acute angle portion formed by the bottom surface 40a and the inclined surface 40c is inserted into the through hole 1a from the front side with the bottom surface 40a on the upper side and the inclined surface 40c on the lower side, and the first wedge member 40 is inserted through the first wedge member 40. It arrange | positions at the hole 1a.

  A second wedge member 41 is provided below the first wedge member 40. The second wedge member 41 is connected to a bottom surface 41a, an end surface 41b substantially perpendicular to the bottom surface 41a, a slope 41c connected to the end surface 41b and the bottom surface 41a, and the end surface 41b, and is connected to a follower node 45 to be described later. The connecting portion 41d is a block having a right triangle shape in a side view. With the inclined surface 41c on the upper side and the bottom surface 41a on the lower side, an acute angle portion formed by the bottom surface 41a and the inclined surface 41c is inserted into the through hole 1a from the back side, and the inclined surface 41c of the second wedge member 41 is formed. The second wedge member 41 is disposed in the through-hole 1a in contact with the inclined surface 40c of the first wedge member 40. The second wedge member 41 is sandwiched between the first wedge member 40 and the front frame 1 through the through hole 1a.

A rear frame 50 is provided behind the front frame 1. A toggle mechanism 42 is provided between the rear frame 50 and the front frame 1 and in the vicinity of the second wedge member 41 to amplify the power of a double-acting air cylinder 60 described later. The toggle mechanism 42 includes a support node 44 that is supported by the rear frame 50. One end of the support node 44 is pivotally attached to the rear frame 50 via a connecting pin 44b, and is configured to rotate around the connecting pin 44b.
The toggle mechanism 42 includes a main drive node 43 that moves up and down by the power of the double-action air cylinder 60, and the main drive node 43 has an axial center between the front frame 1 and the rear frame 50. They are arranged so as to be substantially parallel to the front frame 1 and the rear frame 50. The upper end portion of the main moving node 43 is widened in the front-rear direction, and the other end portion of the support node 44 is pivotally attached to the rear upper end portion 43b of the main moving node 43 via a connecting pin 44a. One end of a follower node 45 that rotates following the vertical movement of the main drive node 43 is pivotally attached to the front upper end 43a of the main drive node 43 via a connecting pin 45a. The other end of the follower 45 is connected to the connecting portion 41d via a connecting pin 45b.

An L-shaped lever member 46 is provided at the lower end portion of the main moving node 43, and a horizontal frame 70 perpendicular to the front frame 1 and the rear frame 50 is provided in the vicinity of the lever member 46. The horizontal frame 70 is provided with a support member 49 that supports a corner portion of the lever member 46, and the support member 49 is disposed near the rear frame 50. The corner portion is pivotally supported by the support member 49 via a connecting pin 49a, and the lever member 46 is configured to rotate about the connecting pin 49a.
The lever member 46 includes a long rod portion 47 and a short rod portion 48 perpendicular to the long rod portion 47, and an end portion of the short rod portion 48 is connected to the main moving node 43 via a connecting pin 46b. It is pivotally attached to the lower end of. The elongate portion 47 is brought close to the main drive node 43 so as to be substantially parallel to the main drive node 43.

In the vicinity of the lever member 46, a rod insertion hole 50 a for inserting a rod 63 described later is formed in the rear frame 50. On the back side of the rear frame 50, a cylinder 61 perpendicular to the rear frame 50 is opposed to the rod insertion hole 50a. A piston 62 is provided inside the cylinder 61, and a rod 63 is attached to the piston 62. The rod 63 is inserted into the rod insertion hole 50a, and the tip of the rod 63 is disposed on the front side of the rear frame 50. The cylinder 61, the piston 62, and the rod 63 constitute a double-acting air cylinder 60 that outputs power to the second wedge member 41.
The tip of the rod 63 is pivotally attached to the end of the long rod 47 via a connecting pin 46a. When the rod 63 moves to the front side, the lever member 46 is shown by a solid line in FIG. As indicated by an arrow, the main link 43 is lowered by rotating clockwise with the connecting pin 49a as a fulcrum. When the rod 63 moves to the back side, the lever member 46 rotates counterclockwise as shown by the broken line arrow in FIG.

  As shown in FIG. 4, the cylinder 61 includes a first chamber 61a and a second chamber 61b separated by the piston 62, and the rod 63 is provided in the piston 62 in the first chamber 61a. . One end portions of a first flow pipe 61c and a second flow pipe 61d through which air flows are respectively connected to the first chamber 61a and the second chamber 61b, and the first flow pipe 61c and the second flow pipe 61c are connected to each other. The other end of the flow pipe 61d is connected to two ports of a 4-port 2-position switching valve (hereinafter referred to as switching valve) 64 having a switching lever 64a. A supply pipe 64a for supplying compressed air and an exhaust pipe 64b for exhausting air are connected to the remaining port of the switching valve 64. The supply pipe 64a has a variable throttle valve 65, an air tank 66, and a check valve. 67 and an air supply source 68 are provided, and an exhaust port 69 is provided in the exhaust pipe 64b.

When the switching valve 64 is in the first position, the first flow pipe 61c and the supply pipe 64a are connected, and the second flow pipe 61d and the exhaust pipe 64b are connected, as indicated by broken line arrows in FIG. The piston 62 moves to the second chamber 61b side due to the pressure of the compressed air supplied and supplied to the first chamber 61a, and the rod 63 moves to the back side. When the switching valve 64 is in the second position, the first flow pipe 61c and the exhaust pipe 64b are connected, the second flow pipe 61d and the supply pipe 64a are connected, and a solid arrow in FIG. As shown, the piston 62 moves to the first chamber 61a side by the pressure of the compressed air supplied to the second chamber 61b, and the rod 63 moves to the front side.
When the supply of compressed air is stopped, backflow of air is prevented by the check valve 67, and air is appropriately supplied from the air tank 66 even if air leaks. The air pressure in the two chambers 61b is maintained.

  Next, the movement of the second wedge member will be described. As shown in FIG. 4, the center point of the connecting pin 44b is a point A, the center point of the connecting pin 45b is a point B, the main driving link 43 is located on the lower side, and the support node 44 and the driven node 45 are When the front frame 1 and the rear frame 50 are inclined downward, the straight line connecting the center point and the point A of the connection pin 44a and the center point and the point B of the connection pin 45a are connected. Let the intersection point with the straight line be point C. An intersection of a straight line connecting the points A and B and a vertical line passing through the point C is defined as a point C ′.

  When the main moving node 43 is positioned at the lower side and the support node 44 and the driven node 45 are inclined downward with respect to the front frame 1 and the rear frame 50, the first chamber 61a is squeezed. When air is supplied, as shown by broken arrows in FIG. 4, the rod 63 moves to the rear side, the main driving link 43 rises, and the support node 44 and the driven node 45 are connected to the connecting pin 44b. And the support pin 44 and the follower node 45 are substantially perpendicular to the front frame 1 and the rear frame 50. At this time, the distance AC′B is smaller than the distance ACB, and the support node 44 is supported by the rear frame 50, so that a compression force acts on the second wedge member 41 connected to the driven node 45. Then, the second wedge member 41 moves to the front side, the first wedge member 40 is pressed, and the core bar 5 is fixed.

  Compressed air is supplied to the second chamber 61b when the main node 43 is positioned on the upper side and the support node 44 and the driven node 45 are substantially perpendicular to the front frame 1 and the rear frame 50. When this is done, as shown by the solid arrows in FIG. 4, the rod 63 moves to the front side, and the support node 44 and the follower node 45 rotate downward with the connection pin 44b and the connection pin 45b as fulcrums. The support joint 44 and the follower joint 45 are inclined downward with respect to the front frame 1 and the rear frame 50. At this time, the distance ACB is larger than the distance AC′B, and the support node 44 is supported by the rear frame 50, so that a tensile force acts on the second wedge member 41 connected to the driven node 45. The second wedge member 41 moves to the back side, and the pressure on the first wedge member 40 is relieved.

Next, force amplification by the toggle mechanism 42 will be described. FIG. 5A is an explanatory diagram for explaining the amplification of the compressive force by the toggle mechanism, and FIG. 5B is an explanatory diagram for explaining the amplification of the tensile force by the toggle mechanism. When the support joint 44 and the follower joint 45 are inclined by θ degrees downward, the power of the double acting air cylinder 60 is transmitted to the main drive joint 43, as shown in FIG. When an upward force F _{0 is applied} to the main drive node 43, a compression force F ₁ and a compression force F ₂ are applied to the support node 44 and the driven node 45, respectively. If | F ₁ | = | F ₂ | = | F ₀ | / ₂ sin θ, and θ is set to be less than 30 degrees, F ₀ is amplified to F ₁ and F ₂ . Further, when a downward force F ₀ ′ is applied to the main drive node 43, F ₀ ′ is amplified in the same manner as when an upward force F ₀ is applied, and tension is applied to the support node 44 and the driven node 45, respectively. A force F ₁ ′ and a tensile force F ₂ ′ act.

  In the spring manufacturing machine according to the first embodiment, the metal core 5 is fitted into the through hole 1a opened in the front frame 1, and the first wedge member 40 and the second wedge are inserted through the through hole 1a. The first wedge member 40 is disposed on the cored bar 5 side so that the inclined surfaces 40c and 41c are brought into contact with each other so that the inclined surface of the member 41 is inclined toward the opening of the through hole 1a. Is provided on the front frame 1 side, and a double-action air cylinder 60 that outputs power and a toggle mechanism 42 that amplifies the power output from the double-action air cylinder 60 are provided. By connecting the double-acting air cylinder 60 to the node 43 and connecting the second wedge member 41 to the driven node 45 of the toggle mechanism 42, for example, a large power is output as in a double-acting hydraulic cylinder. Use double-acting air cylinder 60 that cannot The toggle mechanism 42 changes the direction of the power to amplify the power, and the amplified power is applied to the second wedge member 41 so that the second wedge member 41 is moved to the through hole 1a. The core metal 5 is firmly fixed to the front frame 1 by adjusting the ratio of the second wedge member 41 occupying the space of the through hole 1a, or the core metal. 5 to the front frame 1 can be quickly released.

  In addition, by providing a lever member 46 that connects the double-action air cylinder 60 and the main drive node 43, the output of the double-action air cylinder 60 is amplified by the lever member 46, and the toggle mechanism 42 The power of the dynamic air cylinder 60 is further amplified, and even when the power of the double-action air cylinder 60 is small, the amplified power is applied to the second wedge member 41 so that the second wedge member 41 is moved toward the opening of the through hole 1a, and the ratio of the second wedge member 41 in the space of the through hole 1a is adjusted to firmly fix the cored bar 5 to the front frame 1. Alternatively, the fixing of the metal core 5 to the front frame 1 can be quickly released.

  Moreover, it has the long rod part 47 which connects the said double-acting type air cylinder 60 in the one end part, and the short rod part 48 provided in the other end part of this long rod part 47, The said other end part is a fulcrum. The lever member 46 is configured to rotate, and the short rod portion 48 is connected to the end portion of the main drive node 43, whereby the power of the double-acting air cylinder 60 is transmitted by the lever member 46. Amplifying and further amplifying the power of the double-acting air cylinder 60 by the toggle mechanism 42, and the amplified power is supplied to the second wedge member even when the power of the double-acting air cylinder 60 is small. 41, the second wedge member 41 is moved toward the opening of the through hole, the ratio of the second wedge member 41 in the space of the through hole is adjusted, and the metal core 5 is Either firmly fixed to the front frame 1 or the front of the core 5 It is possible to quickly release the fixed to the frame.

  In addition, by arranging the long rod portion 47 close to the main moving link 43, the lever member 46 and the toggle mechanism 42 are arranged in the existing space between the front frame 1 and the rear frame 50, and the size is increased. Can be avoided.

  In addition, by providing the rod 63 on the piston 62 in the first chamber 61a, the surface area of the piston 62 on the second chamber 61b side is larger than the surface area on the first chamber 61a side, When compressed air is supplied to the chamber 61b, a larger force acts on the piston 62 than when compressed air is supplied to the first chamber 61a, and a large tensile force acts on the second wedge member 41. The fixing of the cored bar 5 can be quickly released. In addition, the use of the double-acting air cylinder 60 makes maintenance easier than in the case of using a double-acting hydraulic cylinder, and an existing air compressor in the factory can be used. There is an effect that the installation cost is not increased and the required installation space is small.

  The first wedge member 40 may be integrally formed with the core metal holder 5a.

(Embodiment 2)
Hereinafter, the present invention will be described in detail with reference to the drawings showing a spring manufacturing machine according to a second embodiment. FIG. 6 is a schematic enlarged side view of the spring making machine with the core bar fixed.

  A first wedge member 80 is provided above the metal core holder 5a. The first wedge member 80 is continuous with the bottom surface 80a, an end surface 80b substantially perpendicular to the bottom surface 80a, a slope 80c continuous with the end surface 80b and the bottom surface 80a, and the end surface 80b, and is connected to the driven node 45. The connecting portion 80d has a triangular shape when viewed from the side. The bottom surface 80a is on the lower side, the inclined surface 80c is on the upper side, and an acute angle portion formed by the bottom surface 80a and the inclined surface 80c is inserted into the through-hole 1a from the back side, and the first wedge member 80 is inserted through the first wedge member 80. It arrange | positions at the hole 1a.

  A second wedge member 81 is provided above the first wedge member 80. The second wedge member 81 is a block including a bottom surface 81a, an end surface 81b substantially perpendicular to the bottom surface 81a, and an inclined surface 81c connected to the end surface 81b and the bottom surface 81a, and has a right triangle shape in side view. An acute angle portion formed by the bottom surface 81a and the inclined surface 81c is inserted into the through hole 1a from the front side with the inclined surface 81c on the lower side and the bottom surface 81a on the upper side, and the inclined surface 81c of the second wedge member 81 is formed. The second wedge member 81 is disposed in the through hole 1a in contact with the inclined surface 80c of the first wedge member 80. The second wedge member 81 is sandwiched between the first wedge member 80 and the front frame 1 through the through hole 1a. The other end of the driven node 45 is connected to the first wedge member 80.

  In the spring manufacturing machine according to the second embodiment, the metal core 5 is fitted into the through hole 1a opened in the front frame 1, and the first wedge member 80 and the second wedge are inserted through the through hole 1a. The two wedge members 81 are arranged on the metal core 5 side so that the inclined surfaces 80c, 81c are brought into contact with each other so that the inclined surface of the member 81 is inclined toward the opening of the through hole 1a. Is provided on the front frame 1 side, and a double-action air cylinder 60 that outputs power and a toggle mechanism 42 that amplifies the power output from the double-action air cylinder 60 are provided. By connecting the double-acting air cylinder 60 to the node 43 and connecting the first wedge member 80 to the driven node 45 of the toggle mechanism 42, for example, a large power is output as in a double-acting hydraulic cylinder. Use double-acting air cylinder 60 that cannot Even if it is, the power is amplified by the toggle mechanism 42, the amplified power is applied to the first wedge member 80, and the first wedge member 80 is moved toward the opening of the through hole 1a. By adjusting the ratio of the first wedge member 80 in the space of the through hole 1a, the core bar 5 is firmly fixed to the front frame 1, or the core bar 5 is moved to the front frame 1. Can be quickly released.

  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 in detail with reference to the drawings showing a spring manufacturing machine according to a third embodiment. FIG. 7 is an explanatory view for explaining the fixing and releasing of the cored bar.

A cylinder 91 that is substantially parallel to the front frame 1 and the rear frame 50 is disposed in the vicinity of the lower end portion of the main moving node 43. A piston 92 is provided inside the cylinder 91, and the cylinder 91 includes a first chamber 91 a and a second chamber 91 b separated by the piston 92. The rod 93 is provided on the piston 92 in the first chamber 91a. The cylinder 91, the piston 92, and the rod 93 constitute a double-acting air cylinder 90 that outputs power to the second wedge member.
The tip end of the rod 93 is connected to the lower end of the main drive node 43. When the rod 93 is raised, the main drive node 43 is raised as shown by the broken arrow in FIG. Further, when the rod 93 is lowered, as shown by the solid line arrow in FIG.

  In the spring manufacturing machine according to Embodiment 3, the metal core 5 is fitted into the through hole 1a provided in the front frame 1, and the first wedge member 40 and the second wedge are inserted through the through hole 1a. The first wedge member 40 is disposed on the cored bar 5 side so that the inclined surfaces 40c and 41c are brought into contact with each other so that the inclined surface of the member 41 is inclined toward the opening of the through hole 1a. Is disposed on the front frame 1 side, and a double-action air cylinder 60 that outputs power and a toggle mechanism 42 that amplifies the power output from the double-action air cylinder 60 are provided. By connecting a double-acting air cylinder 60 and connecting the second wedge member 41 to the driven node 45, a double-acting air cylinder 60 that cannot output a large amount of power, such as a double-acting hydraulic cylinder, for example. Even when using the toggle machine The direction of the power is changed by 42 to amplify the power, the amplified power is applied to the second wedge member 41 to move the second wedge member 41, and the core bar is firmly attached to the front frame 1. Or fixing the cored bar to the front frame 1 can be quickly released.

  Of the configurations according to the third embodiment, the same reference numerals are given to the same configurations as those in the first or second embodiment, and the detailed description thereof is omitted.

1 is a schematic enlarged front view of a spring manufacturing machine according to Embodiment 1. FIG. FIG. 2 is an enlarged side view schematically illustrating a side surface taken along line II-II in FIG. 1 in a state where a core bar of the spring manufacturing machine according to Embodiment 1 is fixed. FIG. 3 is an enlarged side view schematically showing a side surface taken along line III-III in FIG. 1 in a state in which the core bar of the spring manufacturing machine according to the first embodiment is released. It is explanatory drawing of the spring manufacturing machine explaining fixation of the metal core which concerns on Embodiment 1, and cancellation | release of fixation. (A) is explanatory drawing explaining the amplification of the compressive force by the toggle mechanism of the spring manufacturing machine concerning Embodiment 1, (b) explains the amplification of the tensile force by the toggle mechanism of the spring manufacturing machine concerning Embodiment 1. It is explanatory drawing to do. FIG. 5 is a schematic side enlarged sectional view of a spring manufacturing machine in a state where a cored bar according to Embodiment 2 is fixed. It is explanatory drawing explaining fixation of the metal core of the spring manufacturing machine which concerns on Embodiment 3, and cancellation | release of fixation. It is a schematic sectional drawing of the conventional coiling type spring manufacturing machine.

Explanation of symbols

1 Previous frame
1a Through-hole 2 Wire rod feed roller 6 Cutter 5 Core metal 40, 80 First wedge member (wedge member)
41, 81 Second wedge member (wedge member)
42 Toggle mechanism 43 Main drive node 44 Support node 45 Follower node 46 Insulator member 47 Long rod part 48 Short rod part 50 Rear frame 60, 90 Double acting type air cylinder 70 Horizontal frame W Wire rod

Claims (6)

A frame having a through hole, a core metal that is fitted into the through hole and cuts a wire processed into a spring, and is provided between the core metal and the frame at the through hole; A spring manufacturing machine comprising a plurality of wedge members for fixing the cored bar to the frame, and a drive source for applying power to the wedge members;
The wedge members are arranged on the core metal side and the frame side, respectively, so that the slopes of the plurality of wedge members are inclined toward the opening of the through hole, and either wedge member is disposed. It is made to move toward the opening of the through hole so that the ratio of the wedge member in the space of the through hole can be adjusted.
A spring manufacturing machine comprising a power amplifying mechanism for amplifying the power of the drive source and acting on the wedge member.   The power amplifying mechanism includes a main drive node connected to the drive source, and a follower link connected to the main drive node and connected to the wedge member, and converts the direction of operation of the power of the drive source. The spring manufacturing machine according to claim 1, further comprising a toggle mechanism for amplifying power.   The spring manufacturing machine according to claim 2, further comprising a lever member that couples the drive source and the main drive node.   The lever member has a long hook portion that connects the drive source at one end thereof, and a short hook portion provided at the other end of the long hook portion, and rotates around the other end portion as a fulcrum. The spring manufacturing machine according to claim 3, wherein the short rod portion is connected to an end portion of the main drive node.   The spring manufacturing machine according to claim 4, wherein the elongate portion is disposed close to the main drive node. The drive source includes a double-acting air cylinder provided with a rod on one side thereof,
The tensile force is applied to the wedge member when a high pressure is applied to the cylinder chamber on the side where the rod is not provided, according to any one of claims 1 to 5. Spring making machine.

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