JP2013086255A - Apparatus and method for feeding perforated component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeding apparatus for a perforated component that can surely match a guide pin with a hole of the perforated component.SOLUTION: An opening surface 5 is formed in the perforated component 1. The shape of a holding part 16 is set so that the opening surface 5 of the perforated component 1 held by the holding part 16 is inclined to an axis O-O of an electrode guide pin 39. A feed rod 11 is stopped at a portion where a distal end portion of the guide pin 39 is located in a virtual space 44 where the space of the hole 3 is extended in an axis X-X direction of the hole 3. A flying space L is installed to fly the perforated component 1 in the axis X-X direction of the hole 3 in a space from the opening surface 5 up to a guide pin distal end portion 45 in the stop state. When the perforated component 1 is flied by a transmission means 29, an opening edge 8 of the hole 3 hits on a rotation center point P on an outer peripheral surface of the guide pin 39. By the hitting, the perforated component 1 is rotated to relatively advance the guide pin 39 into the hole 3.

Description

  The present invention relates to a perforated component supply apparatus and supply method in which a perforated component is made to fly in a predetermined direction and rotated about a predetermined rotation center point.

  In Japanese Patent No. 2547593, a nut held by a magnet or the like at the tip of a supply rod is stopped in front of a guide pin of a fixed electrode, and the magnetic force is released to rotate the nut by its own weight to turn it into a guide pin. Matching is described. The same is also described in Japanese Patent No. 3878081.

  On the other hand, in Japanese Patent No. 2824739, as a structure for sending parts from the holding portion of the supply rod, it is described that air injection is utilized and the nut is sent and moved in the axial direction of the guide pin of the electrode. .

Japanese Patent No. 2547593 Japanese Patent No. 3878081 Japanese Patent No. 2824739

  In the techniques described in Patent Document 1 and Patent Document 2, the nut stops at a position above the guide pin, and falls from the position by the weight of the nut, that is, falls and rotates to match the guide pin. It is. Therefore, the drop moving speed of the nut is low, and the time required for the fall is long, which is disadvantageous in terms of productivity improvement. In addition, because it depends on natural fall, if an impurity such as iron scrap is interposed between the nut holding part and the nut, and the relative position between the nut holding part and the nut is distorted, the fall trajectory of the nut There is a problem in that the phenomenon of deviating from the normal locus occurs and the screw hole does not reach the guide pin correctly.

  Further, the technique described in the cited document 3 is to force the nut to reach the guide pin by air injection from the holding portion of the supply rod, and the axis of the screw hole and the axis of the guide pin are coaxial. Forced movement is performed in a straight line. For this reason, in the case where the axis of the screw hole intersects the axis of the electrode, the supply is impossible.

  The present invention is provided in order to solve the above-mentioned problems, forcibly flying the perforated component, rotating the perforated component around the rotation center point of the electrode guide pin, It is an object of the present invention to provide a perforated part supply device and a supply method capable of reliably aligning a guide pin with a hole of a perforated part.

  The invention according to claim 1 is an invention of a supply device, which is intended to supply a perforated part and supplies it to a guide pin of an electrode. A circular hole is opened in the perforated part. The shape of the holding portion is such that the opening surface of the perforated part held by the holding portion of the supply rod or the holding portion of the holding head is inclined with respect to the axis of the electrode guide pin. The opening operation of the supply rod is set to stop at a position where the tip of the guide pin is located in a virtual space obtained by extending the space of the hole in the axial direction of the hole, and the opening in the stopped state is set. When a flying space is set up between the surface and the tip of the guide pin to fly the perforated part in the axial direction of the hole, and the perforated part flies in the axial direction of the hole by the sending means arranged in the holding part The opening edge of the hole The location where the outer peripheral surface of the id pin hits is the pivot center point of the perforated part, and the perforated part pivots around this pivot center point, so that the guide pin is relatively moved from the tip part into the hole. It is a supply device of perforated parts characterized by entering.

  The opening surface of the perforated part is inclined with respect to the axis of the guide pin of the electrode, and the advancement of the supply rod causes the tip of the guide pin to be positioned in a virtual space that extends the hole space in the direction of the axis of the hole. A flying space is set between the opening surface in the stopped state and the tip of the guide pin, and a flying space for flying the perforated part in the axial direction of the hole is disposed in the holding portion. When the perforated part flies in the axial direction of the hole by the delivery means, the position where the opening edge of the hole hits the outer peripheral surface of the guide pin is the rotation center point of the perforated part. By rotating the perforated component, the guide pin relatively enters the hole from its tip.

  For this reason, the perforated part is forced to fly in the axial direction of the hole under the positional relationship in which the axis of the hole of the perforated part intersects with the axis of the guide pin. This point is applied to the location, and this point becomes the rotation center point. When the opening edge of the perforated part hits the rotation center point, the perforated part is centered on the rotation center point by the inertial force at the time of flight, and the part far from the rotation center point of the perforated part rotates, that is, The guide pin relatively moves from the tip end portion into the hole by making an arc motion. The perforated part pivots around the pivot center point, which is the exact position determined in this way, and the perforated part always rotates evenly to ensure accurate and reliable perforation. Parts supply is fulfilled.

  Since the advancement of the supply rod stops at the position where the tip of the guide pin is located in the virtual space obtained by extending the hole space in the axial direction of the hole, the virtual space is biased with respect to the tip of the guide pin. However, if it is within the allowable range, that is, even if the virtual space is displaced from the axis of the guide pin, the perforated component can be rotated around the rotation center point. In other words, the axis of the hole of the perforated part and the axis of the guide pin do not cross each other, and even if there is a crossing deviation within the above-described range of allowable deviation, normal rotation and entry of the guide pin into the hole can be prevented. It is done. In other words, if the opening edge is in contact with the rotation center point with the tip of the guide pin entering the hole, even if the virtual space is deviated from the guide pin center line, the guide pin center line and The center line is crossed and centered. Therefore, it is possible to flexibly cope with the crossing deviation of the axes.

  Since the opening surface of the perforated part is inclined with respect to the axis of the guide pin of the electrode, that is, since the axis of the hole of the perforated part and the axis of the guide pin intersect, the supply rod The degree of freedom in selecting the orientation of the device is expanded, and it is easy to install the apparatus even in a factory environment with narrow restrictions.

  Since the perforated part flies in the flying space by the sending means, the time required for the flying is greatly shortened compared to the dropping speed as described above, which is effective for improving the productivity.

  In addition, in the perforated part holding part, even if impurities such as iron scrap are interposed between the perforated part and the holding part and the relative position between the perforated part and the holding part is misaligned, Since the transition is forced to fly at high speed, even if there is a relative position error, the error is erased by the start of high-speed movement, and the flying posture of the perforated part does not become abnormal.

  According to a second aspect of the present invention, there is provided the perforated component supply device according to the first aspect, wherein the guide pin protrudes downward, and suction means for preventing the perforated component from dropping is provided on the guide pin. .

  The perforated part is forced to fly and the guide pin is matched, but in the case of an electrode with the guide pin protruding downward, the perforated part must be prevented from dropping from the guide pin. Since the perforated part is sucked by the guide pin by the suction means, such a fall can be prevented.

  The invention according to claim 3 is an invention of a supply method, in which a perforated part is supplied and supplied to a guide pin of an electrode, and a circular hole is opened in the perforated part. The shape of the holding portion is such that the opening surface of the perforated part held by the holding portion of the supply rod or the holding portion of the holding head is inclined with respect to the axis of the electrode guide pin. The advancing operation of the supply rod set is stopped at a position where the tip end portion of the guide pin is located in a virtual space obtained by extending the space of the hole in the axial direction of the hole, and the guide pin is moved from the opening surface in the stopped state. A flying space for flying the perforated part in the axial direction of the hole is installed between the tip end of the hole and the perforated part is ejected in the axial direction of the hole by the delivery means arranged in the holding part. The outer surface of the guide pin Supplying a perforated part, characterized in that the perforated part is rotated around the center of rotation and the perforated part is rotated about the center of rotation, so that the guide pin relatively enters the hole from its tip. Is the method.

  According to a fourth aspect of the present invention, there is provided the perforated component supply method according to the third aspect, wherein the guide pin protrudes downward, and a suction means for preventing the perforated component from dropping is provided on the guide pin. It is.

  The effect of the invention of the supply method described in claim 3 and claim 4 is the same as the effect of the invention of the supply device.

It is the whole side view of an apparatus, and sectional drawing of the principal part. It is the top view and sectional drawing which show each part of a holding head. It is sectional drawing which shows direction of the nut at the time of an action | operation. It is sectional drawing which shows another form. Furthermore, it is sectional drawing which shows another form. It is sectional drawing which shows another delivery means. It is a perspective view which shows a perforated component.

  Next, a mode for carrying out the perforated component supply device and the supply method of the present invention will be described.

  1 to 7 show Embodiment 1 of the present invention.

  First, components to be supplied will be described.

  FIG. 7 is a perspective view of a perforated component to be supplied. FIG. 7A shows an iron projection nut, which is denoted by reference numeral 1. The main body 2 having a predetermined thickness has a square shape, and a screw hole 3 is formed in the center thereof. The welding projections 4 are formed at the four corners on one side of the main body 2. The upper side of the main body 2 is a flat upper end surface, and this surface is an opening surface 5. Although not shown in FIG. 7A, the lower side is a flat lower end surface, and this surface is the opening surface 6. An opening peripheral edge portion of the screw hole 3 that opens to the opening surface 5 is an opening edge 8.

  The dimensions of each part are such that one side of the main body 2 is 12 mm, the thickness of the main body 2 is 7 mm, and the inner diameter of the screw hole 3 is 6 mm. In this embodiment, the nut 1 shown in FIG. 7A will be described as a supply target. In the following description, the projection nut may be simply expressed as a nut.

  In addition to the nut shown in FIG. 7A, an iron nut 1 as shown in FIG. 7B can be supplied. The main body 2 is hexagonal, and a circular flange 7 is formed on the lower side. (A) The same parts as those in FIG. Although not shown, three welding projections are formed on the lower surface of the flange 7 at intervals of 120 degrees. In addition to the hexagonal nut 1, it is possible to supply a part having a shape such as a distance piece with a hole. Further, as shown in FIG. 2C, a nut 1 having a circular main body 2 can be supplied.

  Next, the component supply device will be described.

  The entire component supply apparatus is denoted by reference numeral 100. The stationary member 10 is composed of a machine frame or a wall plate of the apparatus. The stationary member 10 can be replaced with an arm member of a stationary electric resistance welder, or an arm member of an X gun or C gun type welder operated by a robot apparatus.

  1B is shown in FIG. 1B, and the C arrow view of FIG. 1A is shown in FIG.

  A supply rod 11 that moves forward and backward is accommodated in the outer cylinder 12 in a state where it can advance and retract, and a piston rod 14 of an air cylinder 13 that is an advance / retreat driving means coupled to the outer cylinder 12 is coupled to the supply rod 11. The component supply device 100 is attached by fixing the outer cylinder 12 to the stationary member 10. The supply rod 11 is made of a nonmagnetic material such as stainless steel.

  A holding recess 16 that is a holding portion is formed at the tip of the supply rod 11. The holding recess 16 has a square shape suitable for receiving the square nut 1. The holding recess 16 includes an introduction opening 17 that opens to the side of the supply rod 11, and a nut as shown in FIG. A delivery opening 18 for sending 1 is formed. A supply passage 20 extending from the parts feeder 19 communicates with the introduction / opening portion 17, and the nut 1 enters the holding recess 16 from the supply passage 20 through the introduction / opening portion 17. In order to assist this entering operation, the permanent magnet 25 is disposed on the lower front side of the holding recess 16.

  A passage 22 communicating with the introduction / opening portion 17 is formed in the arm member 21 fixed to the outer cylinder 12 with a bolt or the like, and the supply pipe 23 is coupled by welding or the like in a state of communicating with the passage 22. The supply passage 20 is thus constituted by the passage 22 and the supply pipe 23. A flange plate 24 extends from the upper side of the supply pipe 23 and covers the holding recess 16, thereby preventing the nut 1 from jumping out of the holding recess 16 due to collision repulsion during entry. In FIG. 1C, the two-dot chain line is used for easy understanding of the gutter plate 24.

  Next, the sending means will be described.

  In order to fly the nut 1 as will be described later, a feeding means is provided. As this delivery means, various means such as those using air injection and those in which the nut 1 is shocked out can be adopted. The first case here is by air injection.

  In order to constitute the delivery means, an air injection passage structure is employed. In order to form this air injection passage structure, the distal end portion of the supply rod 11 is divided into an upper member 26 and a lower member 27 due to circumstances of processing and assembly of each portion. The upper member 26 is formed by cutting the lower side of the tip of the supply rod 11 and is made of stainless steel as described above. The holding recess 16 is formed in the upper member 26. The lower member 27 is also made of a non-magnetic material and is made of stainless steel here.

  The bottom surface 28 of the holding recess 16 is a flat surface, and four air injection ports 29 are opened therein so that the jets from the air injection ports 29 are sprayed to four locations on the opening surface 5 or the opening surface 6 of the nut 1. It has become. There are a plurality of spray locations, and the position of the air injection port 29 is selected so that the nut 1 does not tilt. That is, the dynamic pressure of the blast air acts uniformly on the opening surface 5 or the opening surface 6 of the nut 1. Here, as shown in FIG. 2C, air injection is performed aiming at locations close to the four corners of the opening surface 5 or the opening surface 6.

  An air passage 30 is formed in the lower member 27 in order to uniformly inject air from the four air injection ports 29. As shown in FIG. 2, an air passage 30 provided in the lower member 27 opens into the distribution chamber 31, and a distribution passage 32 extending from the distribution chamber 31 in four directions is formed. The distribution chamber 31 is circular and is formed at a location that coincides with the center of the bottom surface 28 of the holding recess 16. The distal end of the distribution passage 32 is formed at a position that matches the air injection port 29.

  Since the positional relationship between the air injection port 29 and the distribution passage 32 is set as described above, the upper member 26 and the lower member 27 are overlapped as shown in FIGS. 2B and 2D, and both are welded. Alternatively, when integrated by bolting or the like, the blast air is ejected from the air passage 30 through the distribution chamber 31 from the air passage 30. That is, the above-described air injection passage structure is formed.

  The air passage 30 of the above-described member communicates with an air passage 33 provided in the longitudinal direction of the supply rod 11, and a joint 34 is connected to the end of the air passage 33, and a telescopic air hose is connected to the joint 34. 35 is connected. The other end of the air hose 35 is connected to an air switching valve (not shown).

  Since the joint 34 advances and retreats as the supply rod 11 advances and retreats, a long hole 36 extending in the advancing and retreating direction is provided in the outer cylinder 12 so that the joint 34 can advance and retreat in the long hole 36.

  The target location to which the nut 1 is supplied is a guide pin 39 protruding downward from the movable electrode 38. A fixed electrode 40 is arranged coaxially with the movable electrode 38, and a steel plate part 41 is placed thereon. Reference OO indicates the electrode axis of both electrodes. This electrode axis OO is common to the axis of the guide pin 39. Therefore, “guide pin axis OO” is described.

  As shown in FIG. 3E, the guide pin 39 is provided with a suction means for preventing the nut 1 from dropping, and here, a magnet 42 is embedded in the guide pin. This magnet may be replaced with an air suction type.

  Next, the holding unit will be described.

  As the holding portion for holding the nut 1, a magnet is provided by providing a positioning pin on the plane of the tip of the supply rod, such as the holding recess 16 in which the nut 1 is fitted in the recess, and the screw hole 3 is matched here. It is possible to adopt a type that holds suction with the The holding posture of the nut is set in the installed state of the holding portion. Here, since the nut 1 is held by the holding recess 16 on the supply rod 11 in the inclined arrangement posture, the holding recess 16 forms a holding portion. Therefore, reference numeral 16 denotes a holding recess and a holding portion.

  By selecting the inclination of the bottom surface 28 of the holding recess 16, the inclination angle of the opening surface 5 of the nut 1 is set. That is, by setting the shape of the holding portion 16, that is, the inclination angle of the bottom surface 28 with respect to the supply rod 11, the inclination angle of the opening surface 5 with respect to the guide pin axis OO is set. In this embodiment, since the bottom surface 28 of the holding recess 16 is the same as the inclination angle of the supply rod 11, the inclination angle of the bottom surface 28 and the opening surface 5 is determined by the inclination angle of the supply rod 11. This inclination angle is indicated by reference sign θ1 in the figure. Here, the inclination angle θ1 is 47 degrees.

  The inclination angle θ1 is set within a range of 20 degrees to 70 degrees. If the tilt angle is less than 20 degrees, in the case of the supply rod 11 as shown in FIG. 3, the supply rod 11 may interfere with the tip corner of the movable electrode 38. If the angle exceeds 70 degrees, a slip phenomenon occurs at the rotation center point P, and the guide pin tip 45 enters the screw hole 3 at a high speed, so that an elastic repulsion phenomenon occurs and the nut 1 moves to the guide pin tip. There is a risk of bouncing off from 45. In other words, when a predetermined rotational motion is performed at the rotational center point P, such a rebound phenomenon does not occur, but if it exceeds 70 degrees, an abnormal nut behavior may occur.

  Next, the stop position of the supply rod will be described.

  The advancing operation of the supply rod 11 stops at a position where the tip 45 of the guide pin 39 is located in a virtual space 44 formed by extending the space of the screw hole 3 in the direction of the axis XX of the screw hole 3. Is set to The guide pin 39 is formed with a cylindrical sliding portion 46 that slides in the receiving hole of the movable electrode 38, and the tip side thereof is a tip portion 45. The distal end portion 45 gradually decreases in diameter toward the distal end side, and the distal end has a spherical shape.

  Further, a flying space L in which the nut 1 is allowed to fly in the direction of the axis XX of the screw hole 3 is provided between the opening surface 5 in a stopped state and the tip portion 45 of the guide pin 39.

  Therefore, when the advancement of the supply rod 11 stops, the tip 45 of the guide pin 39 is located in the virtual space 44. Therefore, when the nut 1 flies in the direction of the axis XX, the opening edge 8 becomes the guide pin 39. It hits the outer peripheral surface. This hit point is the rotation center point P. When the state where the opening edge 8 is in contact with the rotation center point P is viewed statically, a rotation space C is formed on the opposite side of the rotation center point P between the tip portion 45 and the outer portion of the virtual space 44. .

  In FIG. 3F, the guide pin 39 shows a cross section in the diametrical direction at the rotation center point P, and a screw hole with respect to the diametrical center line YY of this part. This is a case where the three axis lines XX are deviated. This deviation is indicated by the symbol M. Even if such a deviation M occurs, the opening edge 8 is displaced and hits the rotation center point P, and then the rotation center point P slides along the opening edge 8, so that the centering is automatically performed. Smooth nut rotation.

  Next, a modified example of the holding unit will be described.

  The holding portion 16 is formed by forming the holding recess 16 at the tip of the supply rod 11, but in this modified example, a holding head 47 is attached to the tip of the supply rod 11, as shown in FIG. A holding recess 16 is provided there. The front end surface of the holding head 47 is cut obliquely, and the holding recess 16 is formed there.

  Since the bottom surface 28 of the holding recess 16 is inclined, the opening surface 5 of the nut 1 entering the holding recess 16 is also inclined, whereby the opening surface 5 is inclined with respect to the guide pin axis OO. . This inclination angle is the aforementioned θ1. The other configuration is the same as that of the holding recess 16 provided in the previous supply rod 11 including a portion not shown, and members having the same function are denoted by the same reference numerals.

  Note that the holding recess 16 shown in FIG. 2 (E) is a case where the square opening for delivery 18 is formed without the introduction opening 17 as described above. In such a case, the nut 1 needs to be supplied from a direction perpendicular to the paper surface of FIG. Even with such a holding recess 16, the same behavior as the nut behavior shown in FIG. 3 is performed.

  Next, a modified example of the sending means will be described.

  The above-mentioned delivery means is based on air injection, but this modified example employs an extruded member. A guide hole 48 that is opened in the bottom surface 28 of the holding recess 16 is provided, and an extrusion member 49 is inserted therein so as to be able to advance and retract. The pushing member 49 is circular, and its diameter is set slightly larger than the inner diameter of the screw hole 3. The guide hole 48 is also a circular hole, and its inner diameter is set slightly larger than the inner diameter of the screw hole 3. Driving means 50 for pushing out the pushing member 49 is attached to the lower side of the supply rod 11. The driving means 50 may be any one that can advance and retract, and an air cylinder, an electromagnetic solenoid, or the like is employed. The pushing member 49 advances at a high speed, and the surface of the pushing member 49 hits the opening surface 6 of the nut 1 at a high speed, and the nut 1 flies in the flying space L due to impact extrusion. That is, the nut 1 is knocked out. The rest of the configuration is the same as that by the previous air injection including the parts not shown, and members having the same function are denoted by the same reference numerals.

  Next, the flying operation of the nut will be described.

  FIG. 3A shows a state where the advancement of the supply rod 11 is stopped at a predetermined position. The figure which expanded this is the figure (D). The nut 1 jumps out in the direction of the axis XX of the screw hole 3 by air injection from the air injection port 29 or shocking high-speed extrusion from the pushing member 49, that is, knocking out, and the flying space L flies. By this protrusion, the opening edge 8 of the screw hole 3 hits the outer peripheral surface of the guide pin 39 as shown in FIG.

  This hitting point is the rotation center point P of the nut 1, and as indicated by the arrow in FIG. 3C, the nut 1 is located in a rotation space at a portion far from the rotation center point P due to the inertial force at the time of flight. It passes through C and performs a pivoting motion, that is, an arc motion. Thus, when the nut 1 rotates around the rotation center point P, the guide pin 39 relatively enters the screw hole 3 from the tip portion. This state that has entered completely is shown in FIG.

  The movable electrode 38 advances from the state of FIG. 3E or FIG. 1A, the welding projection 4 of the nut 1 is pressed against the steel plate part 41, and then the welding current is applied to complete the welding. When the welding protrusion 4 is pressed against the steel plate part 41, the guide pin 39 needs to be retracted into the movable electrode 38. For this purpose, although not shown, the guide pin 39 is held in a movable state with respect to the movable electrode 38 and a spring force in the advancing direction is applied to the guide pin 39 as a generally adopted structure.

  The flying operation as described above is continued until the opening edge 8 hits the rotation center point P. Therefore, it is necessary that the welding protrusion 4 of the nut 1 be separated from the delivery opening portion 18 in a state where the opening edge 8 hits the rotation center point P. By doing so, the nut rotation around the rotation center point P is smoothly performed without interfering with the delivery opening portion 18.

  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.

  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.

  In the above embodiment, the description has been made with an emphasis on the supply device, but the configuration and operation as a supply method are also described at the same time.

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

  The opening surface 5 of the nut 1 is inclined with respect to the guide pin axis OO of the fixed electrode 38, and the advancement operation of the supply rod 11 extends the space of the screw hole 3 in the direction of the axis XX of the screw hole 3. The axis X of the screw hole 3 is set so as to stop at the position where the tip 45 of the guide pin 39 is positioned in the virtual space 44 and between the opening surface 5 in the stopped state and the tip 45 of the guide pin. When a flying space L for flying the nut 1 in the -X direction is installed, and the nut 1 flies in the direction of the axis XX of the screw hole 3 by sending means such as air injection or pushing member arranged in the holding portion 16 A portion where the opening edge 8 of the screw hole 3 contacts the outer peripheral surface of the guide pin 39 is a rotation center point P of the nut 1, and the nut 1 rotates around the rotation center point P, whereby the guide pin 39 is relatively its tip 5 is intended to enter into the threaded hole 3.

  Therefore, the nut 1 is forced to fly in the direction of the axis XX of the screw hole 3 under the positional relationship in which the axis XX of the screw hole 3 of the nut 1 and the axis OO of the guide pin 39 intersect. Therefore, the opening edge 8 of the screw hole 3 is always applied to a fixed portion of the guide pin 39, and this point becomes the rotation center point P. When the opening edge 8 of the nut 1 hits the rotation center point P, the nut 1 rotates about the rotation center point P around the rotation center point P by the inertial force at the time of flight. That is, the guide pin 39 relatively enters the screw hole 3 from the tip 45 by making an arc motion. The nut 1 rotates around the rotation center point P, which is the exact position determined in this way, and the nut 1 always rotates uniformly, so that accurate and reliable nut supply is possible. Fulfilled.

  Since the advancement of the supply rod 11 stops at the position where the tip 45 of the guide pin 39 is located in the virtual space 44 obtained by extending the space of the screw hole 3 in the direction of the axis XX of the screw hole 3, the virtual space Even if 44 deviates with respect to the guide pin tip 45, if it is within an allowable range, that is, even if the virtual space 44 is in a positional relationship deviated from the diameter axis YY of the guide pin 39, A rotation of the nut 1 about the rotation center point P is obtained. That is, the axis XX of the screw hole 3 of the nut 1 and the guide pin axis OO do not cross each other, and even if there is a crossing deviation within the above-described range of allowable deviation, the guide pin 39 To the screw hole 3 is obtained. This crossing deviation is indicated by the symbol M in FIG.

  In other words, if the opening edge 8 is in contact with the rotation center point P with the guide pin tip 45 entering the screw hole 3, even if the virtual space 44 is displaced from the guide pin center line OO, the rotation transient At this time, the guide pin center line OO and the center line XX of the screw hole 3 cross each other, and the centering is performed. Therefore, it is possible to flexibly cope with the crossing deviation between the axis XX and OO.

  Since the opening surface 5 of the nut 1 is inclined with respect to the guide pin axis OO of the movable electrode 38, that is, the axis XX of the screw hole 3 of the nut 1 intersects with the guide pin axis OO. Because of the positional relationship, the degree of freedom in selecting the arrangement posture of the supply rod 11 is expanded, and the apparatus can be easily installed even in a factory environment with narrow restrictions.

  Since the nut 1 flies through the flying space L by the sending means, the time required for the flight is significantly shortened compared to the drop speed as described above, which is effective for improving productivity.

  Further, in the holding portion 16 of the nut 1, impurities such as iron scrap are interposed between the nut 1 and the holding portion (holding recess) 16, and the relative position between the nut 1 and the holding portion (holding recess) 16 is distorted. However, since the nut 1 forcibly shifts to flying at high speed, even if a relative position error exists, the error is erased by the start of high-speed movement, and the flying posture of the nut 1 becomes abnormal. Never become.

  The guide pin 39 protrudes downward, and the guide pin 39 is provided with a magnet 42 as a suction means for preventing the nut 1 from falling.

  The nut 1 is forced to fly and the guide pin 39 is matched. However, in the case of an electrode in which the guide pin 39 protrudes downward, the nut 1 must be prevented from dropping from the guide pin 39. Since the nut 1 is attracted to the guide pin 39 by the permanent magnet 42, such a fall can be prevented.

  Also in the supply method, the same effect as that of the above-described supply device can be obtained.

  In order to establish the above-described air injection passage structure for air injection, the tip of the supply rod is divided into an upper member 26 and a lower member 27, and a holding recess 16 and a plurality of air injection ports 29 are formed in the upper member 26. The distribution chamber 31 and the distribution passage 32 are formed in the lower member 27, and the upper member 26 and the lower member 27 are integrated so that air is injected from the air injection port 29. In addition, the diameter of the distribution chamber 31 can be increased and the formation of the distribution passage 32 can be stopped. With such a configuration, there are advantages such as formation of a uniform distribution of air pressure in the distribution chamber 31 and uniform air injection from each air injection port 29. Further, by using a two-part structure of the upper member 26 and the lower member 27, processing of the passage structure such as the distribution chamber 31 and the distribution passage 32 can be easily performed.

  When the lateral surface of the supply rod 11 is a flat surface 51 over the entire length of the supply rod, when the holding recess 16 advances from the position of the supply passage 20, the flat surface 51 closes the supply passage 20 to prevent the next nut from entering. Like to do. Therefore, it can be avoided that the subsequent nut enters the holding recess 16 to cause an obstacle to the advance operation of the supply rod 11.

  As described above, according to the apparatus and method of the present invention, the perforated part is forcibly ejected, and the perforated part is rotated around the rotation center point of the electrode guide pin to reliably perforate. Guide pins can be matched to the holes in the part. 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 nut 2 Main-body part 3 Screw hole, hole 4 Welding protrusion 5 Opening surface 6 Opening surface 8 Opening edge 11 Supply rod 16 Holding recessed part, Holding part 17 Introducing opening part 18 Sending open part 26 Upper member 27 Lower member 28 Bottom 29 Air injection port 38 Movable electrode 39 Guide pin 40 Fixed electrode 44 Virtual space 45 Tip portion 47 Holding head 49 Pushing member 50 Drive means OO Electrode axis, guide pin axis XX Screw hole axis P Rotation center point L Flight space C Rotating space M Misalignment

Claims (4)

It is intended to supply perforated parts to the electrode guide pins,
This perforated part has an open surface with a circular hole open,
The shape of the holding portion is set so that the opening surface of the perforated part held by the holding portion of the supply rod or the holding portion of the holding head is inclined with respect to the axis of the electrode guide pin,
The advance operation of the supply rod is set so as to stop at a position where the tip of the guide pin is located in a virtual space obtained by extending the hole space in the axial direction of the hole,
A flying space for flying a perforated component in the axial direction of the hole is installed between the opening surface in the stopped state and the tip of the guide pin,
The position where the opening edge of the hole hits the outer peripheral surface of the guide pin when the perforated part flies in the axial direction of the hole by the delivery means arranged in the holding portion is the rotation center point of the perforated part,
A perforated component supply apparatus, wherein the perforated component pivots about the pivot center point, whereby the guide pin relatively enters the hole from the tip end portion thereof.   The perforated component supply device according to claim 1, wherein the guide pin protrudes downward, and suction means for preventing the perforated component from dropping is provided on the guide pin. It is intended to supply perforated parts to the electrode guide pins,
This perforated part has an open surface with a circular hole open,
The shape of the holding portion is set so that the opening surface of the perforated part held by the holding portion of the supply rod or the holding portion of the holding head is inclined with respect to the axis of the electrode guide pin,
The advance operation of the supply rod is stopped at a position where the tip of the guide pin is located in a virtual space obtained by extending the hole space in the axial direction of the hole,
A flying space for flying a perforated component in the axial direction of the hole is installed between the opening surface in the stopped state and the tip of the guide pin,
The perforated component is made to fly in the axial direction of the hole by the delivery means arranged in the holding portion, and the opening edge of the hole is applied to the rotation center point of the outer peripheral surface of the guide pin,
A method for supplying a perforated component, characterized in that the perforated component is rotated around the pivot center point, and the guide pin is relatively moved into the hole from its tip.   The perforated component supply method according to claim 3, wherein the guide pin protrudes downward, and suction means for preventing the perforated component from dropping is provided on the guide pin.

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