JP5013343B2 - Protruding component supply device - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a supply device for a protrusion-equipped component in which a component with a protrusion that has entered a temporary holding chamber is received by a stopper member and temporarily locked, and the component is held on a supply rod and supplied to a target location. .

  Japanese Patent No. 3985237 discloses a guide rod of a supply rod that receives and temporarily locks a projection-like component such as a projection nut that has entered the temporary fixing chamber from a component supply passage with a stopper member. Is opened in a temporary fixing chamber, and the parts are held by a supply rod and supplied to a target location.

Japanese Patent No. 3985237

  The component with a protrusion described in the above-mentioned patent document will be described.

  This protruding component is an iron projection nut shown in FIG. In the following description, the projection nut may be simply expressed as a nut.

  In the projection nut 1, a screw hole 3 is provided at the center of a square main body 2, and welding projections 4 are formed at four corners on one side of the main body 2.

  The nut supply device will be described.

  FIG. 4 shows a component supply apparatus. The nut 1 delivered from the parts feeder 5 is sent to the temporary fixing chamber 7 through the parts supply passage 6. As shown in FIG. 4B, the component supply passage 6 is constituted by a supply pipe 8 having a rectangular cross section, and a stopper member 9 is fixed to the end thereof. The temporary fixing chamber 7 is disposed at the end of the component supply passage 6, and a part of the inner surface of the temporary fixing chamber 7 is constituted by the stopper surface 10 of the stopper member 9. A guide tube 11 having a circular cross section is welded to the end of the supply tube 8, and the supply rod 13 is slidably received in the guide hole 12 of the guide tube 11. The guide hole 12 opens into the temporary fixing chamber 7. The nut 1 held by the supply rod 13 is delivered from an outlet opening 14 provided in the supply pipe 8.

  The supply rod 12 has a circular cross section, and is constituted by a large diameter portion 15 that slides in the guide hole 12 and a small diameter guide rod 16 that passes through the screw hole 3, and a boundary between the large diameter portion 15 and the guide rod 16. The extrusion surface 17 is formed in the part. The supply rod 13 is connected to a piston rod (not shown) of the air cylinder 18 fixed to the guide tube 11 and moves forward and backward.

  The stopper member 9 is fixed by pressing the stopper member 9 against a fixing surface 19 formed on the guide tube 11, and a fixing bolt 20 is used for pressing. The fixing bolt 20 is screwed into a support member 21 welded to the guide tube 11. Then, the nut 1 is sucked to the stopper surface 10 to be temporarily locked. For this purpose, a suction means is provided. Here, the permanent magnet 22 embedded in the stopper member 9 is illustrated. In addition to the permanent magnet 22, it is possible to adopt a vacuum system by air suction. Alternatively, an opening / closing plate that opens and closes the outlet opening 14 may be attached to the supply pipe 8 by a hinge, and the permanent magnet 22 may be stopped and the nut 1 may be temporarily locked by the opening / closing plate.

  As described above, the supply pipe 8 has a rectangular cross section in accordance with the shape of the nut 1. As shown in FIG. 4 (B), the supply pipe 8 is formed by fixing a lid plate 25 to a member 24 having a U-shaped cross section by welding or the like, and the first inner surface 8A and the second inner surface 8B are opposed to each other. The third inner surface 8C and the fourth inner surface 8D are opposed to each other. The first inner surface 8 </ b> A, the third inner surface 8 </ b> C, and the fourth inner surface 8 </ b> D extend toward the stopper member 9 and constitute the inner surface of the temporary fixing chamber 7. The guide hole 12 opens in the extended surface 26 of the first inner surface 8. The extended surface 26 constitutes a part of the inner surface of the temporary fixing chamber 7. The nut 1 is transferred in a state where the welding protrusion 4 is directed toward the first inner surface 8 </ b> A and enters the temporary fixing chamber 7. And it attracts | sucks with the permanent magnet 22 with respect to the stopper surface 10, and as shown to FIG. 4 (A), it is temporarily latched. In this state, the center of the screw hole 3 and the axis of the guide rod 16 are substantially matched.

  The electrode will be described.

  The electrode is used for electric resistance welding, and the fixed electrode 27 and the movable electrode 28 are arranged on the same axis. The fixed electrode 27 is provided with a guide pin 29 for positioning. When the supply rod 13 advances, the guide rod 16 passes through the screw hole 3, the extrusion surface 17 hits the end surface of the nut 1, and the nut 1 is sent out from the outlet opening 14. When the advancement of the supply rod 13 stops when the tip of the guide rod 16 comes just before the guide pin 29, the nut 1 that has slid along the guide rod 16 by the inertial force hits the guide pin 29, and the nut 1 performs an arc motion. It sits on the upper surface of the fixed electrode 27 in such a state. At this time, the guide pin 29 passes through the screw hole 3. The nut 1 seated as described above has the welding projection 4 facing upward, and such a state is usually called “backing out”.

  When the supply of the nut 1 is finished and the supply rod 13 is retracted, the steel plate part 30 is placed on the nut 1, and then the movable electrode 28 advances to pressurize the steel plate part 30 and the nut 1, and the welding current. Is energized, and the welding protrusion 4 is welded to the steel plate part.

  Next, the abnormal posture of the nut will be described.

  5 (A) and 5 (B) are side views of the vicinity of the temporary fixing chamber 7 shown in FIG. 4 (A) as viewed from the left side, and the state in which the cover plate 25 is removed for easy understanding. It is shown.

  As apparent from FIG. 5, the vertical and horizontal dimensions of the component supply passage 6 are set larger than the vertical and horizontal dimensions of the nut 1 in order to smoothly transfer the nut 1. Therefore, the nut 1 moves while rubbing the first inner surface 8A, the second inner surface 8B, the third inner surface 8C, and the fourth inner surface 8D of the component supply passage 6 in an irregular state while moving left and right and up and down. In other words, it moves while making temporary contact with the inner surface here and there.

  At this time, as shown in FIG. 5A, when the nut 1 is in contact with the fourth inner surface and the first inner surface 8 </ b> A, one welding protrusion 4 enters the guide hole 12. This state of entering is shown in FIG. 5C, which is a cross section taken along the line CC in FIG. When the nut 1 moves in such a state that the welding protrusion 4 enters, the welding protrusion 4 moves in the space of the guide hole 12. In this case, the welding protrusion 4 entering the guide hole 12 abuts against the inner surface of the guide hole 12 as shown in FIG. 5B (see FIG. 5D). Due to the contact of the welding protrusion 4, the nut 1 rotates in an arcuate shape and assumes an abnormal posture in which the top surface of the nut is in close contact with the stopper surface 10 as shown in FIG. For this reason, the advancing guide rod 16 cannot penetrate the screw hole 3, and the nut supply becomes impossible.

  As described above, in order for the welding projection 4 to enter the guide hole 12, the nut 1 is inclined, but this inclination is irregularly applied to the inner surface of the component supply passage 6. However, it may be generated when moving, or may be generated depending on the acting direction of the attractive force of the permanent magnet 22. If a large number of nuts 1 are arranged in a daisy chain in the component supply passage 6, when the supply rod 13 is retracted and the next nut 1 is sucked into the temporary lock chamber 7, It is considered that the inclination of the nut 1 is generated by the pressing of. Furthermore, as shown in FIG. 4, if the component supply passage 6 is in an upright direction that is close to the vertical direction, the nut 1 often moves in a location that is offset toward the extended surface 26. It is believed that there is. If the component supply passage 6 is disposed substantially in the horizontal direction, the nut 1 is slid mainly on the second inner surface 8B, so that the phenomenon that the welding protrusion 4 enters the guide hole 12 does not occur. It is done.

  The cases shown in FIGS. 5A and 5B are cases where the interval between the welding projections 4 is larger than the diameter of the guide hole 12, but when this interval is smaller than the diameter of the guide hole 12, The probability that the welding protrusion 4 enters the guide hole 12 is further increased.

  If such an abnormal posture does not occur at all, a steel plate part lacking a nut is transferred to a subsequent process, which causes a defective product. For example, this defect should not occur even once in 10,000 feeding rod advancements and retreats.

  The present invention is provided to solve the above-described problems, and an object of the present invention is to provide a protrusion-equipped component supply device in which the protruding component does not interfere with the guide hole opened in the temporary fixing chamber. To do.

  According to the first aspect of the present invention, a part with a protrusion that has entered the temporary fixing chamber from the component supply passage is received and temporarily locked by a stopper member, and a guide hole of the supply rod that moves forward and backward opens in the temporary fixing chamber. In the type in which the component is held on the supply rod and supplied to the target location, a notch is provided on the inner surface of the temporary stop chamber continuous to the inner surface of the component supply passage, and the opening edge of the opening is the A protrusion supplying device characterized in that a protrusion passing space is formed by positioning the side closer to the stopper member closer to the retreat side of the supply rod than the side farther from the stopper member. .

  By providing the notch, the opening edge of the opening is positioned closer to the retreating side of the supply rod than the side farther from the stopper member, thereby forming a projection passage space. ing. Therefore, even if the protrusion enters the guide hole due to any cause, the protrusion that has progressed as it passes through the guide hole does not interfere with the inner surface of the opening of the guide hole and reaches the stopper member. . Since the protrusion that has entered the guide hole in this way is received by the stopper member without contacting anywhere, there is no turning phenomenon that would cause the protrusion-equipped component to be in an abnormal position, and the correct position can be maintained in the temporary holding chamber. Is temporarily locked, and delivery by the supply rod is normally performed.

  The invention according to claim 2 is the component supplying device with protrusions according to claim 1, wherein the notch is formed in the middle of the opening of the guide hole as viewed in the entry direction of the component.

  Accordingly, since the protrusion that has entered the guide hole passes through the passage space from the middle of the opening of the guide hole, it is temporarily locked in the temporary holding chamber without being in an abnormal posture as described above.

  According to a third aspect of the present invention, the notched portion is formed from a portion having the maximum width of the opening portion of the guide hole when viewed in the component entry direction. Device.

  Since the space after the maximum width of the opening of the guide hole when viewed in the entry direction of the parts is a passing space, the protrusion that has entered the guide hole does not interfere with the inner surface of the opening of the guide hole again, so The normal posture of the parts can be obtained.

  According to a fourth aspect of the present invention, in the apparatus for supplying a projection-equipped component according to any one of the first to third aspects, the notch is a step structure provided on the inner surface of the temporary fixing chamber. is there.

  Since the passage space is formed by the step structure portion, a space from the step structure portion to the stopper member becomes a passage space as a large space. Therefore, a sufficient space for allowing the protrusions to pass can be secured, and a highly reliable operation can be obtained.

  According to a fifth aspect of the present invention, the notched portion is provided with an inclined surface structure portion on the inner surface of the temporary fixing chamber. It is.

  Since the passage space is formed by the inclined surface structure portion, the space from the inclined surface structure portion to the stopper member becomes a passage space as a large space. Therefore, a sufficient space for allowing the protrusions to pass can be secured, and a highly reliable operation can be obtained. And since it is an inclined surface structure, a passage space becomes large gradually and it is suitable for components with low protrusion height of a projection.

  According to a sixth aspect of the present invention, the component is an electric resistance welding component in which a welding projection is provided on one side surface of the component main body. Supply of the component with a projection according to any one of the first to fifth aspects. Device.

  In many cases, electrical resistance welding parts provided with welding protrusions are supplied in a short time. Under such circumstances, the temporary locking posture of the parts is always maintained normally, which is advantageous in terms of improving productivity.

  The invention according to claim 7 is the supply device for the component with protrusions according to claim 6, wherein the component is a projection nut having a component main body formed of a square member and having a screw hole at a central portion thereof.

  In a part provided with a welding projection such as a projection nut, the welding projection does not interfere with the inner surface of the opening of the guide hole, so that a temporary locking posture of the part can be normally secured, and supply trouble does not occur.

It is sectional drawing, the side view, and perspective view which show the Example of this invention. It is sectional drawing which shows another Example. It is a perspective view and sectional drawing of components with a protrusion. It is sectional drawing of a components supply apparatus. It is a side view and sectional view showing the state where a nut becomes an abnormal posture.

  Below, the form for implementing the supply apparatus of the components with a protrusion of this invention is demonstrated.

  1 and 4 show Example 1. FIG.

  Although the problems of the prior art have been described with reference to FIGS. 4 and 5, FIG. 4 can be used as an example drawing. The embodiment of the present invention shown in FIG. 1 shows only the part of the structure shown in FIG. Therefore, the structure part unique to the present invention added to FIG. 4 will be described based on FIG. 1, and the other parts are as described above. 1, members having the same functions as those shown in FIGS. 4 and 5 are denoted by the same reference numerals.

  1 (B), (C), and (D) illustrate only the members constituting the first inner surface 8A of the U-shaped member 24 for easy understanding. A step structure 32 is provided on the extended surface 26. The step structure portion 32 is formed in a direction perpendicular to the longitudinal direction of the component supply passage 6 and crosses the center line OO of the guide hole 12. As is apparent from the shape shown here, the stepped structure portion 32 is constituted by an end wall surface 33 orthogonal to the first inner surface 8A. That is, this step structure 32 corresponds to a notch. Thus, by forming the notch 32, a portion from the end wall surface 33 to the stopper surface 10 becomes a space, and this space is a passage space 34.

  Thus, the opening edge 35 of the guide hole 12 is positioned closer to the stopper rod 9 on the side closer to the stopper member 9 than the side farther from the stopper member 9 when viewed in the transition direction of the nut 1. Here, as shown in FIG. 1C, since the end wall surface 33 is disposed on the diameter line of the guide hole 12, the opening edge 35 closer to the stopper member 9 from the end wall surface 33 is connected to the supply rod 13. Located on the reverse side.

  As shown in FIG. 1D, it is possible to form the notch 32 by shifting it upward in the figure. However, as shown in the two-dot chain line, forming the notch 32 by shifting it downward in the drawing requires consideration of the state of the protrusion of the component. That is, the notch 32 starts from a position having a distance D2 that is narrower than the diameter D1 that is the maximum width of the guide hole 12. Therefore, there is a possibility that the protrusion entering the guide hole 12 may interfere with the inner surface of the guide hole 12 that is narrow when passing through the guide hole 12. In the case of a component in which one protrusion 37 is provided at a location shifted from the center of the circular main body 36 as shown in FIG. 3B, the protrusion 37 interferes with the inner surface of the guide hole 12. However, the part rotates to allow the projection 37 to pass smoothly.

  The part shown in FIG. 3C is an annular washer 38, which is an electric resistance welding part having a welding projection 39 formed on the surface thereof. Such a washer 38 is also an object of the present invention.

  In place of the air cylinder 18 described above, an electric motor that performs forward / backward output can also be employed. It is also possible to replace the permanent magnet 22 with an electromagnet. Further, the supply rod 13 is of a type that penetrates through the screw hole 3 of the nut. Instead, the supply rod is inserted into the hollow outer shaft so that the inner shaft can be moved forward and backward, and a magnet is attached to the tip of the inner shaft, When the component attracted by the magnet reaches the target location, the inner shaft can be retracted to cancel the component adsorption.

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

  By providing the notch 32, the opening edge 35 of the opening is positioned closer to the retreating side of the supply rod 13 than the side farther from the stopper member 9 than the stopper member 9, so that the protrusion A passage space 34 is formed. Therefore, even if the welding projection 4 enters the guide hole 12 due to some reason, the passing space does not interfere with the inner surface of the opening of the guide hole 12 when the welding projection 4 that has proceeded as it passes through the guide hole 12. 34 passes through the stopper member 9. Since the welding protrusion 4 that has entered the guide hole 12 in this way is received by the stopper surface 10 without touching anywhere, the correct orientation can be obtained without causing a turning phenomenon that would cause the nut 1 to become an abnormal posture. Thus, it is temporarily locked in the temporary fixing chamber 7, and the feeding by the supply rod 13 is normally performed.

  The notch 32 is formed in the middle of the opening of the guide hole 12 when viewed in the direction in which the nut 1 enters.

  Therefore, the welding protrusion 4 that has entered the guide hole 12 passes through the passage space 34 from the middle of the guide hole opening, and is thus temporarily locked in the temporary fixing chamber 7 without being in an abnormal posture as described above.

  The notch 32 is formed from a diameter portion that is the maximum width of the opening of the guide hole 12 when viewed in the direction in which the nut 1 enters.

  Since the portion of the diameter portion that is the maximum width of the opening of the guide hole 12 when viewed in the direction in which the nut 1 enters is a passage space 34, the welding protrusion 4 that has entered the guide hole 12 again forms the guide hole 12. The normal posture of the nut 1 can be reliably obtained without interfering with the inner surface of the opening.

  The cutout portion 32 is provided with a stepped structure portion 32 including an end wall surface 33 on the extended surface 26 of the temporary fixing chamber 7.

  Since the passage space 34 is formed by the stepped structure portion 32, a space from the stepped structure portion 32 to the stopper member 9 becomes a passage space 34 as a large space. Therefore, a sufficient space for allowing the welding protrusion 4 to pass through can be secured, and a highly reliable operation can be obtained.

  The component is a component for electric resistance welding in which a welding projection 4 is provided on one side of the component main body 2.

  The electric resistance welding nut 1 provided with the welding protrusion 4 is often supplied in a short time. Under such circumstances, the temporary locking posture of the nut 1 is always maintained normally, which is advantageous in terms of improving productivity.

  The component is a projection nut 1 in which a component main body is composed of a square main body portion 2 and a screw hole 3 is provided at the center thereof.

  Since the welding projection 4 does not interfere with the inner surface of the opening of the guide hole 12 in a part provided with the welding projection 4 such as the projection nut 1, the temporary locking posture of the nut 1 can be normally secured, and supply troubles are caused. Does not occur.

  FIG. 2 shows a second embodiment.

  In the second embodiment, the cutout portion 32 is configured by the inclined surface structure portion 32. For this purpose, the inclined surface 40 is formed from the same location as the stepped structure portion 32 shown in FIG. 1C, thereby forming a passage space 34. Therefore, the opening edge 35 of the opening is positioned closer to the retreat side of the supply rod 13 than the side farther from the stopper member 9 on the side closer to the stopper member 9. Other configurations are the same as those of the first embodiment including the portions not shown, and members having the same functions are denoted by the same reference numerals.

  The notch 32 has an inclined surface structure 32 provided on the extended surface 26 of the temporary fixing chamber 7.

  Since the passage space 34 is formed by the inclined surface structure portion 32, the space from the inclined surface structure portion 32 to the stopper member 9 becomes a passage space 34 as a large space. Therefore, a sufficient space for allowing the welding protrusion 4 to pass through can be secured, and a highly reliable operation can be obtained. And since it is an inclined surface structure, the passage space 34 becomes large gradually and it is suitable for the nut 1 with the low protrusion height of the welding protrusion 1. Other functions and effects are the same as those of the first embodiment.

  As described above, according to the apparatus of the present invention, the projection of the component with the projection does not interfere with the guide hole opened in the temporary fixing chamber. 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 4 Welding protrusion 6 Parts supply passage 7 Temporary stop chamber 8 Supply pipe 9 Stopper member 10 Stopper surface 11 Guide pipe 12 Guide hole 13 Supply rod 14 Outlet opening 26 Extension surface 32 Step structure part, Inclined surface structure part, notch part 33 End wall surface 34 Passing space 35 Opening edge 36 Main body part 37 Protrusion 38 Washer 39 Welding protrusion 40 Inclined surface

Claims (7)

  The parts with protrusions that have entered the temporary holding chamber from the parts supply passage are received by the stopper member and temporarily locked, and the guide hole of the supply rod that moves forwards and backwards opens in the temporary fixing chamber, and the parts are connected to the supply rod. In the type of holding and supplying to the target location, a notch is provided on the inner surface of the temporary fixing chamber continuous to the inner surface of the component supply passage, and the opening edge of the opening is closer to the stopper member. An apparatus for supplying a projection-equipped component, characterized in that a projection passage space is formed by being positioned closer to the retreat side of the supply rod than the side farther from the stopper member.   2. The device for supplying a component with protrusions according to claim 1, wherein the notch is formed in the middle of the opening of the guide hole as viewed in the entry direction of the component.   3. The component supplying device with protrusions according to claim 1, wherein the notch portion is formed from a portion of the maximum width of the opening portion of the guide hole when viewed in the entry direction of the component.   The said notch part is a supply apparatus of the component with a protrusion in any one of Claims 1-3 which provided the step structure part in the inner surface of the said temporary fixing chamber.   The apparatus for supplying a component with protrusions according to any one of claims 1 to 3, wherein the notch portion is provided with an inclined surface structure portion on an inner surface of the temporary fixing chamber.   The supply device for a component with projection according to any one of claims 1 to 5, wherein the component is a component for electric resistance welding in which a welding projection is provided on one side surface of a component main body.   7. The component supplying apparatus according to claim 6, wherein the component is a projection nut having a component main body formed of a square member and having a screw hole at a central portion thereof.

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