JP2019181674A - Holding structure part in supply device of shaft-shaped component - Google Patents

Abstract

To hold a shaft-shaped component in a supply rod tip part by a stable holding structure.SOLUTION: A shaft-shaped component 1 is arranged in a structure portion for holding in a tip part of a supply rod 13 by supplying from a substantially orthogonal direction to an advance-retreat axis O2-O2 of the advance-retreat type supply rod 13, and a holding groove 56 for receiving a shaft part 3 is formed in a holding member 55 for holding the shaft-shaped component 1 simultaneously when holding an end part of the shaft-shaped component 1 by the tip part of the supply rod 13, and a stopping position of the holding member 55 is set to two positions of a standby position for stopping the holding member 55 in an advance space 30 of the supply rod 13 and a retreat position for securing the advance space 30 of the supply rod 13 by a retreat of the holding member 55.SELECTED DRAWING: Figure 1

Description

  The present invention provides a shaft-shaped component supply device that accurately holds shaft-shaped components such as a projection bolt having a flange and a shaft portion, a straight cylindrical shaft member, and a straight pipe member at the tip end of a supply rod. The holding structure part in FIG.

  The supply rod described in Japanese Patent Application Laid-Open No. 2000-167730 is intended for supply of a shaft-like component in which a circular flange and a shaft portion are integrated. This supply rod has a flange closely attached to the tip end surface of the supply rod having a projecting piece, holds the shaft-like component in a vertical posture, and lowers the supply rod in the vertical direction after advancement of the supply rod to Insert it into the electrode insertion hole. A flat stopper piece is provided at the tip of the supply rod, and a recess for receiving the shaft portion is formed there.

JP 2000-167730 A

  The supply rod described in Patent Document 1 is provided with a flat stopper piece protruding from the supply rod at the tip, and a recess for receiving the shaft portion is formed there. Since the concave portion is formed in the flat stopper piece, the depth and length of the concave portion cannot be set to a sufficient value. Therefore, there is a problem that the holding stability of the shaft-shaped component is not improved.

  The present invention has been provided to solve the above-described problems, and an object of the present invention is to hold a shaft-like component at the tip end of a supply rod with a stable holding structure.

The invention described in claim 1
The shaft-shaped component is disposed in a structure part that is supplied from a direction substantially orthogonal to the advance / retreat axis of the advance / retreat type supply rod and is held at the tip of the supply rod,
The holding member that holds the shaft-shaped part is formed with a holding groove that receives the shaft part at the same time that the end of the shaft-shaped part is held at the tip of the supply rod,
The holding member is stopped at two positions: a standby position where the holding member is stopped in the advancement space of the supply rod, and a retreat position where the advancement space of the supply rod is secured by retraction of the holding member. It is a holding | maintenance structure part in the supply apparatus of the shaft-shaped component made into.

  When the shaft-like component is supplied from a direction substantially perpendicular to the advancing / retreating axis of the advancing / retracting supply rod, the end of the shaft-like component is held at the tip of the supply rod by an attractive magnetic force or the like. Simultaneously with this holding, the shaft portion of the shaft-like component is received in the holding groove of the holding member, and the component is held. For this reason, the shaft-like component is accurately stopped at the tip end of the supply rod by holding at the tip end of the supply rod and holding in the holding groove of the holding member. Therefore, since the shaft-like component is held at the two positions of the supply rod tip and the holding member, even if any external force acts on the shaft-like component, the holding position does not easily shift.

  Furthermore, since the shaft portion of the shaft-like component is held in a state of entering the holding groove of the holding member, the shaft portion of the shaft-like component can be surrounded by the holding groove, It is possible to prevent the member from coming into contact with the shaft portion. Thereby, the holding | maintenance stability of a shaft-shaped component improves.

  More importantly, the stop position of the holding member is a standby position where the holding member is stopped in the advancement space of the supply rod, and two positions of the retreat position where the advancement space of the supply rod is secured by retracting the holding member. It has been done. Since the holding member is positioned in the advancing space of the supply rod, the degree of freedom in selecting the size and shape of the holding member is greatly expanded, and accordingly, the shape and dimensions of the holding groove are changed to the shaft part of the shaft-like component. On the other hand, it is possible to optimize, and it is possible to secure a good holding stability of the shaft-like component in the holding member. On the other hand, since the holding member retreats from the advance space of the supply rod and secures the advance space of the supply rod, the advance of the supply rod can be satisfactorily achieved without interfering with the holding member. Further, as described above, since the presence of the supply rod and the presence of the holding member are separately separated, the shape and dimensions of the supply rod and the holding member can be set without being affected by each other. Good supply rod and holding member operation.

It is sectional drawing of the whole apparatus, and sectional drawing of each part. It is a side view which shows the interference state of a supply channel | path member and a movable electrode. It is the side view which avoided the interference of a supply channel | path member and a movable electrode.

  Below, the form for implementing the holding | maintenance structure part in the supply apparatus of the shaft-shaped components of this invention is demonstrated.

  1 to 3 show an embodiment of the present invention.

  In this embodiment, the holding structure according to the present invention is applied to a supply device for a shaft-like component.

  First, the shaft-like component will be described.

  There are various shaft-shaped components such as a general bolt having a hexagonal head, a projection bolt having a circular flange, and a simple round bar-shaped shaft member. Here, the latter projection bolt is the target of supply. In the following description, the projection bolt may be simply expressed as a bolt.

  As shown in each drawing, particularly FIGS. 1 (C) and 1 (F), the shaft-like component 1 is a projection bolt, and a shaft portion 3 having a male screw is integrally formed at the center of a circular flange 2. Is provided. The flange surface opposite to the shaft portion 3 is a flat circular surface 4, and three welding projections 5 are provided on the back surface at intervals of 120 degrees.

  The surface 4 is an “end portion of the shaft-shaped part”, and this end portion is held by the tip end portion of the supply rod. In the case of a simple round bar-shaped shaft part without a flange, the end surface of the shaft part is the “end of the shaft-shaped part”.

  The bolt 1 is made of iron, which is a magnetic material. The outer peripheral part of the flange 2 is shown by the code | symbol 12. In the case of illustration, it has a round shape over the perimeter. The dimensions of each part of the projection bolt 1 are that the diameter and thickness of the flange 2 are 12 mm and 2.5 mm, respectively, and the length and diameter of the shaft part are 13 mm and 5 mm, respectively. In addition, the code | symbol 1 is attached | subjected also to the volt | bolt.

  Next, the whole shaft-part supply device will be described.

  The device here is a bolt supply device and is denoted by the reference numeral 100. In the illustrated case, the steel plate component 9 is placed on the fixed electrode 8, and the shaft portion 3 is inserted into the lower hole 10 of the steel plate component 9 and the receiving hole 11 of the fixed electrode 8. Although not shown, the shaft 3 may be inserted into an opening formed in the counterpart component. Therefore, the lower hole 10, the receiving hole 11, the opening of the counterpart component, and the like serve as insertion holes, which are target locations for supplying the shaft-shaped component. The insertion hole is collectively denoted by reference numeral 6 as the lower hole 10, the receiving hole 11, the opening of the counterpart part, and the like. And the insertion hole 6 is arrange | positioned in the perpendicular direction, The axis line is described as insertion axis line O1-O1.

  The advancing / retracting movable electrode 7 that is paired with the fixed electrode 8 in the same coaxial state will be described in the section of the interference problem described later.

  The supply rod 13 that advances and retreats obliquely downward is accommodated in an outer cylinder 14 having a circular cross section, and the outer cylinder 14 is fixed to a stationary member 15 such as a machine frame of the apparatus 100. The supply rod 13 advances and retreats by the advance and retreat output of the air cylinder 16 coupled to the outer cylinder 14. The advancing / retreating direction is a direction in which the supply rod 13 advances obliquely downward and returns. Therefore, the center axis of the supply rod 13 is described as the advance / retreat axis O2-O2. The advancing / retreating axis O2-O2 intersects with the vertical insertion axis O1-O1 in an inclined state. This crossing angle is a constant angle and does not change even if the supply rod 13 is rotated.

  The cross-sectional shape of the supply rod 13 may be circular, but here, as shown in FIG. 1 (E), it is an oval type in which flat surfaces 31 and 32 are formed on the left and right. In order to prevent the supply rod 13 from rotating in the outer cylinder 14, the regulation pieces 33 and 34 welded to the inner side of the outer cylinder 14 are in close contact with the flat surfaces 31 and 32.

  The bolt 1 is transferred to the vicinity of the insertion hole 6 while being held at the tip of the supply rod 13. A mechanism for holding the bolt 1 on the supply rod 13 will be described later.

  Next, a bolt conveyance structure will be described.

  A structure is employed in which the bolt 1 stored in the parts feeder 18 is conveyed to the vicinity of the tip of the supply rod 13 in a predetermined posture. Sending vibration is applied to the circular bowl 19 and the accelerating structure 20 is sent out, where high-speed jet air is blown from the jet pipe 21 to the bolt 1 and conveyed. A supply hose 22 made of urethane resin or the like is connected to the acceleration structure 20. As shown in FIG. 1D, the supply hose 22 is formed with a T-shaped passage space formed by a flange passing portion 23 and a shaft passing portion 24 through which the flange 2 passes.

  The length of the supply hose 22 ranges from 3 to 4 m and is curved or twisted. A stainless steel introduction pipe 25 is welded to the outer cylinder 14 via a coupling piece 26 to form a curved portion 27. A flange passage portion 28 formed in the introduction pipe 25 communicates with the flange passage portion 23. The shaft passage portion 29 through which the shaft portion 3 passes is like an open groove communicating with the outside, and communicates with the shaft passage portion 24. As described above, the introduction pipe 25 has a shape in which the gap through which the shaft portion 3 passes, that is, the shaft passage portion 29 is provided below the flange passage portion 28. The introduction pipe 25 is a supply passage member for the bolt 1.

  This supply passage member is also denoted by reference numeral 25. When the bolt 1 passes through the curved portion 27 of the supply passage member 25, the bolt 1 is sent out to the advance space 30 of the supply rod 13 from a direction substantially orthogonal to the advance / retreat axis O2-O2.

  When the joint member 34 is welded to the end portion of the introduction pipe 25 and the end portion of the supply hose 22 is press-fitted into the joint member 34, the flange passage portion 23 on the supply hose 22 side communicates with the flange passage portion 28 on the introduction tube 25 side. Further, the shaft passage portion 24 on the supply hose side 22 communicates with the shaft passage portion 29 on the introduction tube 25 side. Since the curved portion 27 is provided, a U-shape or a V-shape is formed by the outer tube 14 and the introduction tube 25 as shown in FIG. In addition, as shown by a two-dot chain line in FIG. 1A, even when the supply passage member is straight and straight, the same displacement as that of the curved introduction pipe 25 is performed.

  The bolt 1 is conveyed at high speed by powerful air injection. At such a high speed, it may be difficult to hold the tip of the supply rod 13 or the tip of the supply rod 13 may be damaged. In order to solve such a problem, stop means for temporarily stopping the bolt 1 is employed. As the stopping means, various means such as a means for stopping by attracting with a magnet and a means for stopping by protruding a stopper member can be adopted. Here, the latter stopper member is used.

  An air cylinder 35 is fixed to the upper surface of the introduction pipe 25, and its piston rod 36 protrudes or retreats to the flange passing portion 28. When the bolt 1 is conveyed at high speed while protruding, it is received by the piston rod 36 and temporarily stopped.

  The bolt 1 once stopped is transferred by the carrier air from the injection pipe 21, but here the carrier air diverges from the shaft passage portion 29 through which the shaft portion 3 passes. The air pressure for the portion 3 cannot be obtained. Therefore, the cover member 37 is attached to the introduction pipe 25 to have a closed cross-sectional structure so that the carrier air does not diverge from the shaft passage portion 29. As shown in FIG. 1C, the cover member 37 is formed by bolting a curved member having a U-shaped cross section through a fixing piece 38. As a cover structure other than this, it is also possible to attach a cover member having an arc cross section.

  By attaching the cover member 37, the carrier air hits the outer peripheral portion 12 and the shaft portion 3 of the flange 2, so that when the piston rod 36 is retracted, the bolt 1 is supplied to the supply rod 13 at a moderate speed.

  Next, a structure for holding a bolt at the tip of the supply rod will be described.

  A receiving recess 39 of the flange 2 is formed at the tip of the supply rod 13. FIG. 2B is a view showing a state in which the receiving recess 39 is looked up from below. The receiving recess 39 is provided with a holding surface 40 to which the surface 4 of the flange 2 is in close contact, an arc portion 41 that matches the outer peripheral portion 12 of the flange 2, and an inlet passage portion 42 through which the flange 2 passes. The depth dimension L1 of the receiving recess 41 viewed in the entry direction 2 is set to be approximately the same as or larger than the diameter dimension of the flange 2. The flange 2 that has passed through the flange passage portion 28 enters the receiving recess 39 so as to slide through the inlet passage portion 42, and stops when the flange 2 matches the arc portion 41. The depth dimension H of the receiving recess 39 viewed almost in the direction of the component axis O3-O3 is set slightly larger than the thickness of the flange 2.

  FIG. 2 shows a state in which the supply rod 13 is not rotating around the advance / retreat axis O2-O2. In this state, the component entry line O4-O4, which is the entry direction line of the flange 2, passes through the center of the receiving recess 39, and the bolt 1 is inserted into the insertion hole 6 while drawing an arc locus along with this. The center point A1 is located on the part entry line O4-O4. The arc portion 41 extends 90 degrees on both sides of the component entry line O4-O4.

  A structure in which the surface 4 of the flange 2 is brought into close contact with the holding surface 40 and the adhesion force to the holding surface 40 is extinguished when the supply rod 13 advances to a predetermined position is employed as the suction means 44. As the suction means 44, various types such as an air suction type and an electromagnet type can be adopted. Here, the permanent magnet type is also indicated by the reference numeral 44.

  The supply rod 13 is a hollow shaft into which an inner shaft 45 is inserted in a slidable state. A recess is provided near the tip of the inner shaft 45 and a permanent magnet 44 is embedded therein. In order to protect the permanent magnet 44, a cover plate 46 is fixed to the end of the inner shaft 45 by welding or the like, and the surface of the cover plate 46 is the holding surface 40 described above.

  FIGS. 1A and 1F show a state in which the inner shaft 45 is stopped at the most advanced position. At this time, the receiving recess 39 is waiting for the flange 2 to enter, and the flange 2 Enters the receiving recess 39 from the flange passing portion 28 through the inlet passing portion 42, and stops in conformity with the arc portion 41. In this stopped state, the surface 4 of the flange 2 is in close contact with the holding surface 40 by the attractive force of the permanent magnet 44. When the supply rod 13 advances to the vicinity of the insertion hole 6 by the operation of the air cylinder 16, the attractive force of the permanent magnet 44 is extinguished, and the lower end portion of the shaft portion 3 enters the insertion hole 6 while drawing an arc locus. go. In addition, the permanent magnet 43 is installed as a suction assistance when the flange 2 enters the receiving recess 39. This is accommodated in a container welded to the end of the outer cylinder 14, and the flange 2 entering is strongly sucked so that the arc part 41 can be reliably reached.

  In order to introduce and hold the bolt 1 at the tip of the supply rod 13, the above-described receiving recess 39 is formed. Instead of the receiving recess 39, a simple flat surface is provided at the tip of the supply rod 13, It is also possible to form a stopper member that receives the flange 2 that has entered here.

  Next, the advancing / retreating structure of the magnet will be described.

  The suction force control of the suction means means control of whether the bolt 1 is held at the distal end of the supply rod or whether the holding is released. Therefore, as described above, an air suction type or an electromagnet type can be adopted. Here, the permanent magnet method is a mechanical method in which the permanent magnet 44 is attracted closest to the bolt 1 or is separated to substantially eliminate the attractive force.

  The permanent magnet 44 is separated from the flange 2 to substantially eliminate the attractive force on the bolt 1. As a structure for this purpose, a thin bar is coupled to the permanent magnet 44, and the bar is moved forward and backward to move the permanent magnet 44 away from the flange 2, or an air cylinder is coupled to the end of the inner shaft 45, so that the inner shaft 45 You can adopt things that move forward and backward. Here, the latter inner shaft advance / retreat type is adopted.

  As described above, the supply rod 13 is inserted into the hollow tubular hollow shaft 13A in a state where the inner shaft 45 can be advanced and retracted, and the restriction pin 47 fitted to the inner shaft 45 is opened to the hollow shaft 13A. It protrudes into the outer cylinder 14 through the hole 48. A compression coil spring 49 is interposed between the upper end portion of the inner shaft 45 and the inner end surface of the hollow shaft 13A, and the tension acts in the direction of pushing out the inner shaft 45, and by this tension, the restricting pin 47 has the long hole 48. It hits the bottom edge. In this state, the inner shaft 45 is placed at the foremost position, the above-described receiving recess 39 is formed, and the flange 2 can be received.

  An air cylinder 50 as a driving means is fixed to the outer surface of the outer cylinder 14, an engagement piece 52 is coupled to the piston rod 51, and the outer cylinder 14 passes through a long hole 53 opened in the outer cylinder 14. Projecting inside. The engagement piece 52 and the regulation pin 47 are set to have relative positions so that the regulation pin 47 can face the engagement piece 52 when the supply rod 13 moves by a predetermined length of stroke.

  Next, the holding of the bolt shaft portion will be described.

  When the bolt 2 is slid into the receiving recess 39 while the flange 2 moves in the flange passage portion 28, it is necessary to ensure the holding stability of the bolt 1 and securely hold the bolt 1 at the tip of the supply rod 13. There is. The bolt 1 is transferred by the blast air or attracted by the permanent magnet 43 and smoothly enters the receiving recess 39, and the outer peripheral portion 12 of the flange 2 matches the arc portion 41 and stops. At this time, the lower end portion of the shaft portion 3 may swing clockwise in FIG. 1A due to inertial force. When the speed of entry of the bolt 1 into the receiving recess 39 is too high, there is a problem that the bolt 1 falls from the receiving recess 39.

  In order to solve such a problem, an advancing / retracting holding member 55 is disposed. The holding member 55 is formed of a substantially rectangular parallelepiped elongated member, and a holding groove 56 into which the shaft portion 3 enters is formed. The holding member 55 is made of, for example, stainless steel. The holding groove 56 opens to the introduction tube 25 side so as to communicate with the shaft passage portion 29, and a receiving surface 57 that receives the shaft portion 3 is formed on the opposite side. It is desirable that the receiving surface 57 has a circular arc shape in which the shaft portion 3 exactly matches. The width dimension of the holding groove 56 is set slightly larger than the diameter dimension of the shaft portion 3. The holding member 55 is disposed in the advance space 30 of the supply rod 13. When the holding member 55 exists in the advance space 30, the holding member 55 functions to receive the bolt 1, and at this time, the supply rod 13 cannot advance.

  Since the holding member 55 needs to be retracted when the supply rod 13 advances, as shown in FIG. 1B, the holding member 55 is moved to the position indicated by the two-dot chain line. This is operated by the advance / retreat driving means 58 fixed to the introduction tube 25 or the stationary member 15. Here, an air cylinder is employed as the advance / retreat driving means, and the piston rod 59 is coupled to the holding member 55. FIG. 1B is a plan view seen from the direction (B) of FIG.

  The holding position of the holding member 55 is two positions: a standby position where the holding member 55 is stopped in the advance space 30 of the supply rod 13 and a retreat position where the advance space 30 of the supply rod 13 is secured by retraction of the holding member 55. It is said that. That is, the standby position shown by the solid line in FIG. 1A and the retracted position shown by the two-dot chain line.

  When the bolt 1 is conveyed and the flange 2 is received by the arc portion 41 of the receiving recess 39, the shaft portion 3 that has entered the holding groove 56 is received by the receiving surface 57 almost simultaneously. Therefore, the bolt 1 is reliably held at the tip of the supply rod 1 without causing the above-described inertial abnormal displacement. Thereafter, the holding member 55 is retracted to the position shown by the two-dot chain line by the operation of the air cylinder 58, and the supply rod 13 can be advanced.

  Next, rotation of the supply rod and the outer cylinder will be described.

  FIG. 2 is a side view of the bolt supply device 100 as viewed from the side. In this state, the introduction tube 25, the cover member 37, and the like interfere with the movable electrode 7, and the device does not hold. Therefore, the outer cylinder 14 is rotated around the advance / retreat axis O2-O2 to avoid the interference. For this purpose, a straight outer cylinder 14 is attached to the stationary member 15 in a state in which position adjustment in the rotational direction is possible. As the position adjustment structure in the rotation direction of the outer cylinder 14, the outer cylinder 14 can be sandwiched by a V-shaped block, or a fastening member that can be elastically displaced can be used. Here, it is the latter type of fastening member.

  A stainless steel fastening member 60 is fixed to the stationary member 15. A tightening hole 61 through which the outer cylinder 14 passes is formed in the tightening member 60, and the tightening hole 61 communicates with the outside through a split groove 62. A fastening bolt 63 that acts to narrow the gap between the split grooves 62 is screwed into the fastening member 60.

  When the tightening bolt 63 is loosened and the outer cylinder 14 is rotated to adjust the position, and then the tightening bolt 63 is tightened, the outer cylinder 14 is firmly tightened in the tightening hole 61 and the adjustment of the rotational position is completed. By such position adjustment, the interference state of FIG. 2 is avoided and the non-interference state shown in FIG. 3 is established.

  Next, the depth dimension of the receiving recess will be described.

  When the outer cylinder 14 is rotated, the receiving recess 39 is also rotated together. In order to prevent the introduction tube 25, the cover member 37, and the like from interfering with neighboring members such as the movable electrode 7, the outer tube 14 is rotated to rotate the introduction tube 25, the cover member 37, and the like together. When the rotation angle θ is 30 degrees, as shown in FIG. 3B, the center point A1 of the arc locus of the bolt 1 exists at a position displaced by 30 degrees from the component entry line O4-O4. ing. Since the arc-shaped portion is sufficiently present on both sides of the center point A1, which is the lowest point, that is, the depth dimension L1 of the receiving recess 39 viewed in the component entry line O4-O4 direction is set to be sufficiently long. Therefore, the bolt 1 can be inserted into the insertion hole 6 by drawing an accurate arc locus with the center point A1 as the base point on the bolt 1.

  As shown in FIG. 3C, for example, when the introduction tube 25, the cover member 37, and the like are largely shifted as shown in FIG. 3C, the depth of the receiving recess 39 is a short dimension L2. In some cases, one of the arc-shaped portions formed on both sides of the center point A1 has a sufficient angular range, but the other angular range is reduced. For this reason, the arc locus of the bolt 1 with the center point A1 as the lowest point may not be accurately drawn. That is, the flange outer peripheral portion 12 on one side of the center point A1 matches the arc portion 41 with a sufficient angle range, but the flange outer peripheral portion 12 on the other side of the center point A1 has an arc portion 41 with a slight angle range. It will be in a state that only matches. Therefore, the retaining property of the flange 2 in the arc portion 41 having a slight angle range becomes unstable, and a deflection displacement occurs in the arc locus drawn by the tip portion of the shaft portion 3, so that the insertion hole 6 does not enter smoothly. Arise.

  Such an abnormal phenomenon is caused by the fact that the depth dimension L2 of the receiving recess 39 is excessively small. Therefore, the depth dimension L1 of the receiving recess 39 viewed in the approach direction of the flange 2 (part entry line O4-O4 direction). However, it is necessary to set to approximately the same as or larger than the diameter of the flange 2. By setting in this way, even if the rotation angle θ is increased, the bolt is inserted while drawing a stable arc locus.

  When the supply rod 13 is rotated, if the angle is given to the advance / retreat axis O2-O2 and the component axis O3-O3 of the bolt 1, a slight arc displacement of the bolt tip portion occurs due to the rotation of the supply rod. However, since the inner diameter of the insertion hole 6 is set to be slightly larger, this arc displacement is absorbed. If there is no such absorption margin dimension, the position of the advance / retreat axis O2-O2 is finely adjusted, and the relative position of the bolt tip and the insertion hole 6 is finely adjusted. In general, the crossing angle between the advance / retreat axis O2-O2 of the supply rod 13 and the component axis O3-O3 of the bolt 1 is not very narrow, and the crossing relationship is almost a straight line.

  In the above embodiment, the bolt 1 having the flange 2 is the target part, but a simple shaft part without a flange or a straight pipe member may be the target part.

  It should be noted that an electric motor that performs forward / backward output can be employed instead of the various air cylinders. It is also possible to replace the various permanent magnets with electromagnets.

  The parts feeder is of a type that vibrates the bowl, but it may be of a type in which the parts are attracted to a rotating plate by a magnet and sent out from a delivery pipe. The parts feeder 18 described above is of a type that vibrates the bowl 19, but instead of this, a magnet is assembled to a standing rotary disk and the parts adsorbed by the rotation of the disk are guided to the delivery passage. Can be.

  The illustration of the air supply / discharge pipe to each air cylinder is omitted.

  Operations such as the above-described advance / retreat operation of the supply rod and air injection can be easily performed by a generally adopted control method. A predetermined operation can be ensured by combining an air switching valve that operates with a signal from the control device or the sequence circuit, a sensor that emits a signal at a predetermined position of the air cylinder, and transmits the signal to the control device.

  The operational effects of the embodiment described above are as follows.

  When the bolt 1 is supplied from a direction substantially perpendicular to the advance / retreat axis O2-O2 of the advance / retreat type supply rod 13, the end of the bolt 1 is held at the tip of the supply rod by an attractive magnetic force or the like. Simultaneously with this holding, the shaft portion 3 of the bolt 1 is received in the holding groove 56 of the holding member 55 to hold the parts. For this reason, the bolt 1 is accurately stopped at the distal end portion of the supply rod by the holding at the distal end portion of the supply rod 13 and the retention groove 56 of the holding member 55. Therefore, since the bolt 1 is held at two positions, that is, the distal end portion of the supply rod 13 and the holding member 55, even if any external force acts on the bolt 1, the holding position does not easily shift.

  Further, since the shaft portion 3 of the bolt 1 is held in a state of entering the holding groove 56 of the holding member 55, the shaft portion 3 of the bolt 1 can be surrounded by the holding groove 56, Any member can be prevented from contacting the shaft portion 3. Thereby, the holding | maintenance stability of the volt | bolt 1 improves.

  More importantly, the stop position of the holding member 55 is the standby position where the holding member 55 is stopped in the advancement space 30 of the supply rod 13, and the advancement space 30 of the supply rod 13 is secured by retracting the holding member 55. That is, the retreat position is set at two positions. Since the holding member 55 is positioned in the advancing space 30 of the supply rod 13, the degree of freedom in selecting the size and shape of the holding member 55 is greatly expanded. Accordingly, the shape and dimensions of the holding groove 56 are changed to bolts. It is possible to optimize with respect to one shaft portion 3 and to secure good holding stability of the bolt 1 in the holding member 55. On the other hand, since the holding member 55 retreats from the advance space 30 of the supply rod 13 to secure the advance space 30 of the supply rod 13, the advance of the supply rod 13 can be satisfactorily achieved without interfering with the holding member 55. In addition, as described above, since the presence of the supply rod 13 and the presence of the holding member 55 are separately separated, the shapes and dimensions of the supply rod 13 and the holding member 55 are not affected by each other. The operation of the supply rod 13 and the holding member 55 can be improved.

  Since the holding member 55 is formed of an elongated rectangular parallelepiped member, the location where the holding groove 56 is formed and the location where the air cylinder 58 which is the advance / retreat driving means can be positioned independently, which simplifies the structure. Effective in terms.

  By attaching advancing / retreating drive means such as an air cylinder 58 to the supply passage member 25, the advancing / retreating operation structure of the holding member 55 is well organized and compact.

  Since the depth direction of the holding groove 56 and the approach direction of the bolt 1 (part entry line O4-O4 direction) are the same, the holding member 55 is retracted while the bolt 1 is held in the receiving recess 39, and the supply rod 13 advance spaces can be secured.

  As described above, according to the holding structure portion of the present invention, the shaft-like component can be held at the distal end portion of the supply rod by the stable holding structure. Therefore, it can be used in a wide range of industrial fields such as automobile body welding processes and home appliance sheet metal welding processes.

DESCRIPTION OF SYMBOLS 1 Projection bolt, shaft-shaped component 2 Flange 3 Shaft part 4 Surface 6 Insertion hole 7 Movable electrode 8 Fixed electrode 10 Lower hole 11 Receiving hole 12 Outer peripheral part 13 Supply rod 13A Hollow shaft 14 Outer cylinder 25 Introduction pipe 30 Advance space 37 Cover member 39 receiving recess 40 holding surface 41 arc portion 42 inlet passage portion 44 attracting means, permanent magnet 45 inner shaft 55 holding member 56 holding groove 57 receiving surface 58 advance / retreat driving means, air cylinder 60 clamping member 100 bolt supply device O1-O1 insertion axis O2-O2 advance / retreat axis O3-O3 component axis O4-O4 component entry line A1 center point, lowest point L1 depth dimension

Claims (1)

The shaft-shaped component is disposed in a structure part that is supplied from a direction substantially orthogonal to the advance / retreat axis of the advance / retreat type supply rod and is held at the tip of the supply rod,
The holding member that holds the shaft-shaped part is formed with a holding groove that receives the shaft part at the same time that the end of the shaft-shaped part is held at the tip of the supply rod,
The holding member is stopped at two positions: a standby position where the holding member is stopped in the advancement space of the supply rod, and a retreat position where the advancement space of the supply rod is secured by retraction of the holding member. The holding | maintenance structure part in the supply apparatus of the shaft-shaped component used as.

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