JP4174806B2 - Parts supply device - Google Patents

Description

  The present invention relates to a component supply apparatus that supplies a component by a supply rod having a holding recess provided at a distal end portion.

Japanese Patent No. 3326490 is a prior art related to the present invention. Here, a recess for holding a projection nut is provided at the tip of the supply rod, and an inlet opening for introducing a nut fed from a parts feeder or the like into the recess and the supply rod advance It is disclosed that an outlet opening portion where the nut relatively exits from the recess is formed at a location, and the supply rod returns as it is when the supply rod advances and the nut is supplied to the target location.
Japanese Patent No. 3326490

  In the concave portion of the supply rod as described above, the nut that has entered may collide with the inner wall of the concave portion, and at that time, the nut may be flipped off and come out of the concave portion.

  The present invention has been provided to solve the above-described problems, and provides a component supply device that can prevent components from escaping from the holding recesses of the supply rod and improve the supply efficiency of the components. Objective.

Means to solve the problem

The present invention has been provided to solve the above-described problems. The invention according to claim 1 is a holding recess for holding a component at the tip of a supply rod that moves forward and backward along a guide member. The holding recess is provided with a passage opening portion where the tip end side of the supply rod is open and a receiving opening portion where the receiving side of the component is open, and when the supply rod is in the retracted position, the components in the holding recess are A restricting member for preventing transition from the passage opening portion to the outside of the holding recess is arranged in a state in which it can advance and retreat from the lower side with respect to the inside of the holding recess, and the supply rod of the supply rod does not interfere with the restricting member in the advanced position passing space portion for permitting the forward and backward movement is formed along the longitudinal direction of the feed rod tare is, the passage space is open downwardly over the entire length of the reciprocating stroke of the feed rod with communicates with the holding recess Formed by the transverse side and the notch-shaped portion which is open on the lower side of the groove or the feed rod, the regulating member is configured to be able to enter the groove when the feed rod is advanced This is a component supply device.

The invention's effect

  Even if a phenomenon has occurred in which the component introduced into the holding recess collides with the inner wall of the holding recess and the component is flipped off to the tip end side of the supply rod, the advanced regulating member is the component. Therefore, it is possible to prevent the component from escaping from the holding recess.

  And since the said passage space part is formed even if a control member exists in an advance position, a supply rod can be advanced / retreated without interfering with a control member. This means that when the part is held in the holding recess and the supply rod advances, the regulating member moves backward to avoid interference with the part, but at the point when the supply rod advances and the part reaches the target location. The restricting member can be advanced. In this way, when the restricting member is advanced in advance and the supply rod returns to the retracted position without interfering with the restricting member, the next part can be immediately introduced into the holding recess. That is, since the restricting member has advanced in advance, additional time for allowing the restricting member to advance after the return of the supply rod can be saved, and the operation time of the apparatus can be shortened.

  Furthermore, even if the supply rod advances without any parts being introduced into the holding recess due to some reason, the interference between the regulating member and the supply rod is prevented by the passage space, so the device is damaged. There is nothing to do.

  According to a second aspect of the present invention, the part is a perforated part, and in order to prevent interference between the positioning pin penetrating the hole of the perforated part arranged at the part supply point and the holding concave part, The component supply device according to claim 1, wherein a passage groove along a longitudinal direction of the supply rod is provided on the holding surface.

  With such a configuration, the positioning pin protruding through the hole of the perforated component is accommodated in the passage groove. Thus, since the interference between the positioning pin and the holding recess can be prevented by the passage groove, the positioning pin can be advanced until it penetrates through the hole of the perforated part. Therefore, since the positioning pin sufficiently penetrates the hole of the perforated part, the part is securely held at the part supply point.

  A third aspect of the present invention is the component supply apparatus according to the second aspect, wherein the passage groove is open at a tip end side of the supply rod.

  Thus, since the front end side of the passage groove is open, the supply rod can be retracted while the positioning pin has penetrated the hole of the perforated part. Therefore, the supply rod can be retracted in a state where the perforated part is securely held by the positioning pin, and the operation reliability as the apparatus can be improved.

  Invention of Claim 4 is the components supply apparatus in any one of Claims 1-3 in which the suction holding means which attracts | sucks the components in a holding | maintenance recessed part and sets a holding position is provided in the supply rod. .

  As described above, since the component is adsorbed to a part of the holding recess by the suction holding means, the component is positioned at a predetermined position of the holding recess, and the relative position between the component and the target location when the supply rod advances. Can be set accurately, and the supply accuracy of the apparatus can be accurately maintained.

  Next, the best mode for carrying out the component supply apparatus according to the present invention will be described.

  The long supply rod 1 advances and retreats along the guide member 2. The guide member 2 may be any member as long as it guides the forward / backward movement of the supply rod 1. Here, the guide member 2 has a closed sectional structure with a rectangular cross section, and the supply rod 1 is slidably supported in the closed sectional space. 4 and 5A are (4)-(4) cross-sectional views and (5)-(5) cross-sectional views of FIG. 1, and the guide member 2 has a U-shaped cross-section containing member 3 opened upward. The lid plate 4 is fixed with bolts (not shown) or the like. In FIG. 1, the lid plate 4 is not shown for easy understanding.

  In order to move the supply rod 1 forward and backward, an air cylinder 5 as forward / backward drive means is fixed to the housing member 3 via a coupling member 6, and the piston rod 7 of the air cylinder 5 is coupled to the end of the supply rod 1. It is.

  The parts that are the subject of the present invention are perforated parts such as iron projection nuts and washers. The component in this embodiment is a projection nut 8, and as shown in FIGS. 2, 3 and 4, a welding projection 9 and a screw hole 10 (see FIG. 6A) are provided. In the following description, the projection nut 1 may be simply expressed as a nut 1.

  In FIG. 1 (A), the structure of the front-end | tip part of the supply rod 1 is shown with the chain line. On the other hand, in FIG. 5B, the tip of the supply rod 1 is inverted and shown by a solid line for easy understanding.

  A holding recess 11 for holding the nut 1 in a state where the nut 1 is accommodated is formed at the tip of the supply rod 1. The holding recess 11 is formed by cutting out the tip of the supply rod 1, and includes a receiving / opening portion 12 that opens to the side of the supply rod 1 and a passage opening 13 that opens to the tip of the supply rod 1. Is formed. The receiving / opening portion 12 communicates with the transfer passage 14 of the nut 8. The transfer passage 14 is constituted by a passage tube 15 and has a rectangular cross section extending from a parts feeder (not shown). As shown in FIG. 3, the passage pipe 15 penetrates the lateral wall of the housing member 3, and the transfer passage 14 communicates with the receiving / opening portion 12.

  On the other hand, the passage opening portion 13 is open to the tip end side of the supply rod 1 as shown in FIG.

  In order to set the holding position of the nut 8 that has entered the holding recess 11, the holding surface of the holding recess 11, that is, the ceiling surface 16 and the vertical inner wall 17 are formed, and the nut 8 is in close contact with the ceiling surface 16 and the vertical inner wall 17. Thus, the holding position is set. As shown in FIG. 1B, the vertical inner wall 17 is a curved wall surface.

  In order to bring the nut 8 into close contact with the ceiling surface 16 and the vertical inner wall 17, suction holding means is provided. As the suction holding means, various methods such as a method of sucking the nut 8 with a magnet and a method of sucking the nut 8 with negative air pressure can be adopted. This embodiment is a magnet attraction method, in which a permanent magnet 18 is embedded in the supply rod 1. As is apparent from FIGS. 1, 2, and 3, the permanent magnet 18 is disposed at a location where the nut 8 is attracted to both the ceiling surface 16 and the vertical inner wall 17.

  When the supply rod 1 is in the retracted position as shown in FIG. 1A, a restriction is applied to prevent the nut 8 that has entered the holding recess 11 from exiting from the passage opening portion 13 of the holding recess 11. A member 19 is provided. The restricting member 19 prevents the nut 8 from moving, and is disposed in a state in which the restricting member 19 can move forward and backward with respect to the holding recess 11. As shown in FIG. 4, the restricting member 19 is composed of a rod-shaped member, and is advanced and retracted by an air cylinder 20 fixed to the lower side of the guide member 2 (accommodating member 3). In the illustrated example, the restricting member 19 is configured by a piston rod of the air cylinder 20. The restricting member 19 passes through an auxiliary plate 21 fixed to the lower surface of the housing member 3 and a through hole 22 opened in the lower portion of the housing member 3.

  As shown in FIG. 3 which is a cross section (3)-(3) in FIG. 1 and other FIGS. 4 and 5, the supply rod 1 interferes with the regulating member 19 in the advanced state. A passage space 23 and a notch space 24 are formed to prevent this.

  The passage space portion 23 communicates with the holding recess 11 and is formed over the entire length of the advance / retreat stroke of the supply rod 1 in the advance / retreat direction of the supply rod 1. And this passage space part 23 is formed of the ditch | groove open | released downward. The same reference numerals as the passage space portion 23 are also written in the concave groove.

  Further, as shown in FIG. 5 (A), the notch space 24 is formed by notching one side of the supply rod 1 and extends over the entire length of the advance / retreat stroke of the supply rod 1 in the advance / retreat direction of the supply rod 1. Is formed. The notch space 24 is formed to prevent the block member 25 protruding into the closed section space of the guide member 2 from interfering with the supply rod 1.

  The block member 25 has a substantially cubic shape, is fitted into a notch opening 26 provided in the guide member 2, and protrudes into the closed cross-sectional space of the guide member 2. The protruding portion 27 of the block member 25 is received in the notch space portion 14. And the block member 25 is adjacent to the holding | maintenance recessed part 11, as shown in FIG.1 and FIG.3. A permanent magnet 28 is embedded in the block member 25 in order to attract the nut 8 into the holding recess 11.

  As shown in FIG. 2, an air cylinder 30 is disposed below the guide member 2, and a piston rod 31 is coupled to the guide member 2. The air cylinder 30 is fixed to a stationary member 32 such as a machine frame of the apparatus, and the piston rod 31 is arranged in a direction orthogonal to the advancing / retreating direction of the supply rod 1. Therefore, as shown in FIG. 2, the square motion 33 is formed as indicated by reference numeral 33 by combining the forward / backward movement of the supply rod 1 and the forward / backward movement of the air cylinder 30.

  As shown in FIGS. 5A and 3, the passage space 23 described above is configured in the form of a concave groove 23, which prevents interference between the regulating member 19 and the supply rod 1. Therefore, as shown in FIG. 5B, the cutout portion 29 may be open to the side.

  In a perforated part such as the projection nut 1, a positioning pin passes through the hole at the supply location where the supply rod 1 has advanced, and the perforated part is prevented from shifting.

  In this embodiment, a steel plate part 35 is placed on the fixed electrode 34 of the electric resistance welder, and a positioning pin 36 is provided with a pilot hole 37 (FIG. 6A) for positioning the steel plate part 35. See). The positioning pin 36 is advanced and retracted by an air cylinder 38. The air cylinder 38 is accommodated in the fixed electrode 34 and fixed to the stationary member 32 together with the fixed electrode 34.

  The movable electrode 39 that forms a pair with the fixed electrode 34 is shown by a two-dot chain line in FIG.

  As indicated by a two-dot chain line in FIG. 6A, when the supply rod 1 moves forward and the screw hole 10 of the nut 8 and the positioning pin 36 become coaxial, the advancement stops at that position. When the piston rod 31 of the air cylinder 30 is retracted, the entire supply rod 1 is lowered together with the guide member 2 and the positioning pin 36 penetrates into the screw hole 10 relatively. At this time, the positioning pin 36 protrudes to the upper side of the nut 8.

  In order to allow such a protrusion of the positioning pin 36, a passage groove 40 is formed in the holding surface of the holding recess 11, that is, the ceiling surface 16. For this reason, the protruding portion of the positioning pin 36 does not interfere with the ceiling surface 16. The passage groove 40 is disposed along the forward / backward direction of the supply rod 1, and the distal end side of the holding recess 11 is open. This opening is indicated by reference numeral 41.

  Next, the operation of the above-described apparatus will be described.

  In a state where the supply rod 1 is most retracted by the operation of the air cylinder 5, the transfer passage 14 and the receiving / opening portion 12 communicate with each other. When the nut 8 is transferred to this state, the nut 8 is attracted by the permanent magnet 28 around the receiving opening 12 and introduced into the holding recess 11. The nut 8 introduced in this way is attracted to the ceiling surface 16 and the vertical inner wall 17 by the permanent magnet 18, and the holding position of the nut is determined.

  Thus, before the nut 8 is introduced, the regulating member 19 has advanced into the holding recess 11. Therefore, even if the nut 8 collides with the vertical inner wall 17 at high speed and the nut 8 tries to jump out of the passage opening portion 13, the nut 8 is not restrained by the restricting member 19 and the nut 8 is not lacking.

  Thereafter, when the regulating member 19 moves backward, the supply rod 1 immediately advances and the nut 8 stops at a position indicated by a two-dot chain line in FIG. 6A without contacting the regulating member 19. Then, when the piston rod 31 of the air cylinder 30 is retracted, the positioning pin 36 relatively passes through the screw hole 10 as shown in FIG. At this time, even if the positioning pin 36 protrudes above the screw hole 10, the protruding portion is accommodated in the passage groove 40, so that interference between the positioning pin 36 and the ceiling surface 16 does not occur.

  Next, as shown in FIG. 6C, when the supply rod 1 is retracted, the nut 8 is locked to the positioning pin 36 and placed on the steel plate part 35. When the supply rod 1 is retracted, the nut 8 comes out of the holding recess 11 relatively from the passage opening portion 13. Thereafter, the movable electrode 39 advances to pressurize the nut 8, a welding current is applied, and the welding protrusion 9 is welded to the steel plate part 35.

  As shown in FIG. 6B, when the supply rod 1 is advanced, the regulating member 19 has already protruded as shown by the two-dot chain line. Since such a protrusion is made with respect to the inside of the concave groove 23, abnormal contact between the regulating member 19 and the ceiling surface 16 does not occur.

  Since the restricting member 19 has already advanced in this manner, the nut 8 can be prevented from popping out when the supply rod 1 is retracted, so that the nut 8 can be immediately introduced into the holding recess 11 and the operation can be improved. Time saving is realized.

  In order to obtain the operation as described above, the operation sequence of the air cylinders 5, 20, 30, 38, etc. is performed by combining a normal air control valve that performs intake and exhaust of the operating air to and from each air cylinder and a sequence control device. It can be realized easily.

  The functions and effects of the embodiment described above are listed as follows.

  A phenomenon occurs in which the projection nut 8 introduced into the holding recess 11 collides with the curved vertical inner wall 17 of the holding recess 11 and the nut 8 is flipped to the tip end side of the supply rod 1. In addition, since the restricting member 19 in the advanced state suppresses the transition of the nut 8, the nut 8 can be prevented from escaping from the holding recess 11.

  Even if the restricting member 19 is in the advanced position, since the concave groove 23 is formed, the supply rod 1 can advance and retreat without interfering with the restricting member 19. This is because when the nut 8 is held in the holding recess 11 and the supply rod 1 moves forward, the regulating member 19 moves backward to avoid interference with the nut 8, but the supply rod 1 moves forward and reaches the target location. When the nut 8 is reached, the regulating member 19 can be advanced. By doing so, the next nut 8 can be immediately introduced into the holding recess 11 when the regulating member 19 is advanced in advance and the supply rod 1 returns to the retracted position without interfering with the regulating member 19. . That is, since the regulating member 19 has advanced in advance, additional time for moving the regulating member 19 after the supply rod 1 is restored can be saved, and the operation time of the apparatus can be shortened.

  Furthermore, even if the supply rod 1 advances without the nut 8 being introduced into the holding recess 11 for some reason, the interference between the regulating member 19 and the supply rod 1 (ceiling surface 16) is caused by the recess groove 23. This prevents the device from being damaged.

  The nut 8 is a perforated component, and is provided on the ceiling surface 16 in order to prevent interference between the positioning pin 36 penetrating the screw hole 10 of the nut 8 and the ceiling surface 16 disposed at the supply location of the nut 8. A passage groove 40 is provided along the longitudinal direction of the supply rod 1.

  With such a configuration, the positioning pin 36 that protrudes through the screw hole 10 of the nut 8 is accommodated in the passage groove 40. Thus, since the interference between the positioning pin 36 and the holding recess 11 can be prevented by the passage groove 40, the positioning pin 36 can be advanced until it penetrates through the screw hole 10 of the nut 8. Accordingly, since the positioning pin 36 sufficiently penetrates the screw hole 10 of the nut 8, the nut 8 is reliably held at the supply location of the nut 8.

  In the passage groove 40, the distal end side of the supply rod 1 is opened by an opening portion 41.

  Thus, since the front end side of the passage groove 40 is open, the supply rod 1 can be retracted while the positioning pin 36 has penetrated the screw hole 10 of the nut 8. Accordingly, the supply rod 1 can be retracted in a state where the nut 8 is securely held by the positioning pin 36, and the operation reliability as the apparatus can be improved.

  A permanent magnet 18 that attracts the nut 8 in the holding recess 11 to set the holding position is provided on the supply rod 1.

  Thus, the nut 8 is attracted to the ceiling surface 16 and the vertical inner wall 17 of the holding recess 11 by the permanent magnet 18, so that the nut 8 is positioned at a predetermined position of the holding recess 11 and the supply rod 1 is advanced. Sometimes the relative position between the nut 8 and the target location (positioning pin 36) can be set accurately, and the supply accuracy of the apparatus can be accurately maintained.

  As described above, according to the present invention, since the perforated component does not inadvertently escape from the holding recess, the component supply accuracy as an apparatus is improved. Therefore, it can be widely used in the welding process of automobile steel plate components, the sheet metal welding of home appliances, and the like.

It is a top view of the whole apparatus and a supply rod tip part. It is a side view which shows the whole apparatus. It is (3)-(3) sectional drawing of FIG. It is (4)-(4) sectional drawing of FIG. It is (5)-(5) sectional drawing of FIG. It is a side view which shows an operation | movement order.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Supply rod 2 Guide member 3 Housing member 8 Projection nut 10 Screw hole 11 Holding recessed part 12 Receiving open part 13 Passing open part 16 Ceiling surface 17 Vertical inner wall 18 Permanent magnet 19 Restricting member 23 Passing space part, groove 36 Positioning pin 40 Passing Groove 41 opening

Claims (4)

A holding recess for holding the component is formed at the distal end of the supply rod that moves forward and backward along the guide member, and a passage opening portion in which the distal end side of the supply rod is opened and a component receiving side are opened in the holding recess. A receiving member is provided, and when the supply rod is in the retracted position, a regulating member that prevents the components in the holding recess from moving from the passage opening to the outside of the holding recess can advance and retract from the lower side with respect to the holding recess. are arranged in a state, the passage space for permitting the forward and backward movement of the feed rod without interfering with the regulating member is formed along the longitudinal direction of the feed rod tare in the advanced position is, the passage space is maintained The regulating portion is formed by a recessed groove that communicates with the recess and opens downward over the entire length of the advance / retreat stroke of the supply rod, or a notch-shaped portion that opens laterally and downwardly of the supply rod. Component supply apparatus characterized by being configured to be able to enter the groove when the feed rod is advanced in.   The part is a perforated part, and in order to prevent interference between the positioning pin penetrating the hole of the perforated part arranged at the part supply point and the holding concave part, the length of the supply rod is fixed to the holding surface of the holding concave part. The component supply apparatus according to claim 1, wherein a passage groove is provided along the direction.   The component supply apparatus according to claim 2, wherein the passage groove is open at a tip end side of the supply rod.   The component supply apparatus according to any one of claims 1 to 3, wherein a suction holding means for sucking a component in the holding recess to set a holding position is provided on the supply rod.

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