JP2006240791A - Oscillating type part feeding method, and feeder therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a structure of an oscillating bowl, improve the durability, and reduce man-hours for manufacturing by providing/unifying the sorting functions at one place. <P>SOLUTION: In an oscillating type parts feeding method, when welding nuts are placed on a part transport truck 3 arranged at the inner wall of an oscillating bowl 2 in a parts feeder, and, while the welding nuts are sequentially aligned, the welding nuts in a normal posture are sorted and fed from a parts exhaust port at the ascending termination of the truck to an objective place, the vicinity of the parts exhaust port of the oscillating bowl 2 is freely attachably and detachably fitted with a parts sorting unit 70 for passing only the welding nuts in the normal posture along a shape of a circumferentially curved surface of a bowl wall where vibrations are transmitted to the centrifugal direction of the oscillating bowl. This constitution makes it possible to immediately deal with sorting of the welding nuts along with size changing by replacing only the parts sorting unit 70 or adjusting the unit parts. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to the field of parts feeders (vibration-type component supply devices) used by being attached to resistance spot projection welding machines, and more specifically, projections (welding projections) are made of square nuts, hexagonal nuts or T-shaped nuts. The present invention relates to a component supply method and a built-in component sorting apparatus for discriminating or sorting the front and back (forward and reverse directions) of projection weld nuts and other similar welded small parts (hereinafter referred to as weld nuts) formed at corners.

  The welding nut is used by projection welding or spot welding to the mating plate. Generally, the types of welding nuts made of steel are divided into hexagonal welding nuts, square welding nuts, and T-shaped welding nuts as defined by Japanese Industrial Standards (JIS) B1196. , M5, M6, M8, M10, and M12.

    Conventionally, for example, when a square welding nut is supplied to a welding position, a welding nut N having welding projections P at the four corners is continuously aligned and fed through a conveying track 31 that spirally rises from the bottom of the vibration ball 30. To pay. In this case, while the welding nut rises along the conveyance track 31, the direction of the welding projection is selected to be downward or upward, and the welding projection has a downward nut (part in a normal posture) and the welding projection is upward. A nut supply method in which the nuts (parts in an abnormal posture) are passed through the blade-type track 34 to select the front and back, and only the parts in the normal posture are sent to a feeder unit (nut supply head) attached to the resistance spot welder; The apparatus is generally known (see FIGS. 14 and 15).

  The conventional parts front and back sorting method and apparatus is, for example, a sorter blade type track 34 in which several blade dies (a blade shape having a substantially serrated cross section) are formed at the rising end portion of the transport track 31 in the component traveling direction. Are continuously connected to each other.

  In this case, the normal part moves along the guide rails 32 and 33 of large and small metal round bars, and when crossing the next blade type track 34, the projection P of the welding nut N is caught in one direction. It moves forward and is sent out to the parts exit (see FIGS. 13 and 14).

    On the other hand, when the welding projection is in the opposite direction (upward), the flat surface 35 at the top of the nut is not caught by the blade groove 36 and slips into the vibrating ball and is collected on the tip of the blade tip (FIG. 15). reference). Then, it moves upward again along the transport track 31.

    Although omitted in the figure, the weld nuts that have been properly sorted and aligned are transported to the rail pulled out to the outside of the ball and separated one by one on the way. The separated welding nut is blown off vigorously in the supply hose by the compressed air ejected from the air nozzle and fed to the feeder unit.

    The welding nut sent to the feeder unit is temporarily stopped at the stopper position in the feeder unit. The stopped welding nut is held at the tip of the spindle by driving the spindle for supplying the welding nut forward from the feeder unit. The welding nut held on the spindle is separated from the stopper position by the advance of the spindle and is supplied to the work set position of the lower electrode at the advance arrival position of the spindle.

    The supplied welding nut is clamped together with the workpiece set on the lower electrode by the pressurizing operation of the upper electrode, and the required electrode pressure is applied, and the welding current is concentrated on the projection of the nut to cause Joule heat with the mating workpiece. To be joined by heating and melting.

  Various sorts of sorting methods, such as a blade-type track and a guide rail for large and small elongated metal round bars, have been employed in conventional vibratory weld nut supply devices as devices for sorting the direction of weld nuts.

When the present applicant has investigated the above-mentioned prior art documents, for example, as disclosed in Patent Documents 1-4, there is known a vibration welding nut supply device having a mechanism or a sorting function for sorting the front and back of a welding nut. ing. Also, a vibratory part supply method for sending parts to a target location from a part discharge port at an ascending end of the truck while placing a nut on a spiral part conveyance truck provided in a vibration ball of a parts feeder and sequentially aligning them A nut parts sorting unit is detachably attached in the vicinity of the parts outlet of the ball, and the parts sorting unit can be replaced or the parts of the unit can be adjusted to cope with different parts sorting. For example, Patent Document 5 discloses a parts selection system.
Japanese Utility Model Publication No. 60-151821 Japanese Utility Model Publication No. 62-074617 JP 2000-219314 A JP 2001-072233 A US Pat. No. 6,129,200

  The problem to be solved by the present invention is that in the conventional vibration welding nut supply system and apparatus (Patent Documents 1-4), when the outer dimension of the welding nut is changed from, for example, an M6 nut having a different size to an M8 nut, welding is performed. A special vibration ball was required for each nut size, and cost cuts and delivery times could not be shortened. The conventional welding nut front and back sorting equipment required skill and experience to weld guide rails of large and small elongated metal round bars along the track, and could not realize standardized products.

  On the other hand, in the sorting method (Patent Document 5) corresponding to the change of the shape and size of the supply parts by the common ball only by replacing the parts sorting unit or adjusting the unit parts, the parts sorting unit is elongated in a straight line from the ball parts discharge port. Because of the arrangement, the welding nut is driven in a linear direction by vibration acting in the ball centrifugal direction from the drive source, so that it is not sufficient to efficiently obtain the following action of the parts. In addition, this type of component orientation unit is not enough to determine the accuracy of sorting the front and back of special parts with multiple protrusions at the corners, such as square welded nuts, hexagonal welded nuts or T-shaped welded nuts. There was still room for development to solve the problem.

  The present invention has been developed to solve the above-mentioned problems. In the first invention, welding nuts are placed on a component conveying track arranged in a spiral shape along the inner wall of the vibration ball of the parts feeder and sequentially aligned. However, when the welding nut is sent from the component discharge port at the end of the rising of the truck toward the target location, a component selection unit for discriminating the normal posture and abnormal posture of the welding nut is attached / detached near the component discharge port of the ball By mounting it as possible, only the part selection unit can be replaced according to the type and / or size of the welding nut used, and the part selection unit that is detachably attached in the vicinity of the part discharge port of the ball is abnormal. The welding nut in the posture is discharged out of the parts conveyance truck, and only the welding nut in the normal posture is passed through to the target location. In the vibrating component supply method, the component selection unit is configured to determine a separation path between the selection plate for guiding the welding nut, a selection rail provided in the welding nut traveling direction of the selection plate, and the rail. There is provided a vibration type component supply method comprising a regulating width adjusting plate, and capable of moving and adjusting the width adjusting plate in the rail direction according to the size of a component welding nut.

  A second invention is a parts feeder for supplying a welding nut onto a panel work in order to pressure weld the welding nut and the panel work with an upper electrode and a lower electrode of a resistance spot welder. And an inner wall of the vibrating ball for continuously transferring the welding nut in the vibrating ball to the component discharge port of the ball while sequentially aligning the welding nut in the vibrating ball on the ball vibration. And a parts sorting unit that is detachably attached in the vicinity of the parts discharge port of the ball and sorts the normal posture and the abnormal posture of the welding nut. In the vibration type component supply device, the component selection unit detachably attached in the vicinity of the component discharge port of the ball includes the welding nut. A sorting rail which is provided along the sorting plate and allows only a welding nut in a normal posture to pass through a gap formed between a welding projection of the welding nut and the transport surface of the track. And a vibration-type component supply device including a presser plate that is above the sorting rail and allows only a welding nut in a normal posture to pass at a height.

  According to the third aspect of the invention, there is provided a parts feeder for supplying the welding nut onto the panel work in order to pressure weld the welding nut having the welding projection and the panel work with the upper electrode and the lower electrode of the resistance spot welder. The parts feeder includes a vibrating ball that accommodates the welding nut and the welding nut in the vibrating ball placed on the ball vibration and sequentially aligned toward the component discharge port of the ball. Select the normal posture and abnormal posture of the parts transport track spirally arranged along the inner wall of the vibrating ball and the welding nut detachably attached in the vicinity of the part discharge port of the ball. In the vibration type component supply apparatus comprising the component selection unit for performing the above operation, the component selection unit is moved in the traveling direction from the component conveyance track. A curved surface, which is removably attached to an opening where the inner wall of the vibration ball is cut out, and which is substantially matched with the curved surface of the ball, forms a part of the inner wall of the ball, and an outer curved surface of the base plate. A blade type sorting plate that is inclined so that the inner side gradually becomes lower in the normal direction and is disposed on the extension of the component transporting track, and a normal posture and an abnormal posture that are above the blade type sorting plate. Provided is a vibration component supply device including a wiper that allows only a welding nut normally defined by a height dimension difference to pass therethrough.

  According to the method of the first invention, even when the outer dimension of the welding nut is changed from M6 to M8 having a different size, the vibration ball for M6 can be used as it is only by replacing or adjusting one component selection unit. Regardless of the size, the supplied parts only rise along the conveying track in the vibrating ball, so the common vibrating ball can be used even if the outer dimensions of the welding nut are changed.

  Therefore, compared with the conventional part selection method, the standardized vibration ball can be realized by the method of the present invention, which is necessary for each change in the shape of the selected part. This eliminates the need for welding of the sorting rail to the parts track of a simple transport truck and its welding skill and rule of thumb. Since the sorting function is provided as a unit in one place, the structure of the vibrating ball is simple and the durability is improved, and the number of manufacturing steps can be greatly reduced.

  In addition, the device of the second invention is useful when the blade-type track is not used, and only replaces or adjusts the component selection unit at the component discharge port portion of the transport track. There is no need to adjust the guide rail when transferring to the groove. Therefore, compared to the conventional device, since there is no longer a long and thin metal bar for the guide rail that is required along the edge track, it takes less time to manufacture and it is possible to standardize the parts selection unit and the vibration ball. Cost reduction is possible.

  Further, according to the apparatus of the second invention, the height or interval of the passage can be easily adjusted in accordance with the external dimension of the sorting part, and the sorting ability can be increased.

  Further, according to the invention device, the gap between the sorting rail and the width adjusting plate of the sorting plate can be easily moved in the width direction of the component runway according to the shape and size of the nut or the protrusion. Since the sorting plate can be replaced when the fixed distance between the guide and the sorting rail does not match the dimensions of the supplied parts, the parts sorting unit needs to be replaced with the minimum necessary. ， There are fewer types of parts selection units.

  According to the second aspect of the invention, the component selection unit, which is a combination of a rail-type selection plate and a width adjustment plate and a press plate, is compact and has a short selection distance. Therefore, the structure is simple and the width adjustment plate and the press plate are welded nuts. It can be easily adjusted in accordance with the shape and size of the welding projections, and can be easily used as a separate product as a component selection unit single product.

  According to the third invention, since the mounting angle of the part selection unit is arranged along the same circumference as the ball wall, the followability for moving the welding nut from the vibration source by the vibration acting in the centrifugal direction of the ball Works efficiently and provides stable transportation. In addition, the parts selection unit becomes compact, so the installation space to the vibration ball is reduced by half, and large parts from M4 to M12 can be passed. By preparing various parts selection units for each size of the welding nut, A common vibrating ball can be used. For example, even when the welding nut is changed from M4 to M10, it can be dealt with immediately by simply replacing the component selection unit corresponding to the component size.

  According to the third invention, compared to the second invention, it is possible to select a larger weld nut size than the second invention, and because the number of parts can be reduced, it is compact and easy to adjust the parts. Man-hours and costs can be reduced.

  In contrast to the conventional welding nut supply method that required a dedicated vibration ball, the present invention replaces or replaces only the replaceable part selection unit at the part unloading part of the vibration ball even when the outer dimensions of the welding nut are changed. Realize the standard production of a vibratory parts supply device that can be handled immediately by just adjusting.

  FIG. 1 is a plan view showing a typical example when the first invention of the present application is carried out on a conveyance track installed on a vibration ball for supplying a welding nut. FIG. 2 is a detailed plan view of the component selection unit of the present invention. 3 is a view taken in the direction of arrow A in FIG. 4 is a view taken in the direction of arrow B in FIG. FIG. 5 is a schematic cross-sectional view showing the ball body attachment, unit part assembly structure, and part travel path of the part selection unit of the present invention.

  Reference numeral 1 denotes a vibration type part feeder for selecting a welding nut. Reference numeral 2 denotes a vibration ball that accommodates a welding nut. Reference numeral 3 denotes a spiral component conveying track in which a large number of welding nuts N that receive vibration from the ball separation bottom 4 are randomly raised along the ball wall 5, aligned, and sent to the outside (see FIG. 1).

  Reference numeral 6 denotes a first wiper that protrudes inward from the ball wall 5 above the component conveyance track. This wiper 6 narrows the part track width of the transport track 3 toward the inside of the ball and passes the part track of the specified width, and transports the welding nut N that is randomly transported on the part transport track regardless of the front and back sides. The amount is regulated and excess parts are excluded to align and transport (see FIGS. 1 and 12).

  Reference numeral 7 denotes a built-in sorting device having a unit structure (hereinafter also referred to as a component sorting unit). Details are shown in FIGS. Reference numeral 8 denotes a sorting plate constituting the parts sorting unit. The sorting plate 8 is detachably attached to the fixed support plate 10 extended to the outside of the ball by a bolt B1 in the vicinity of the component discharge port of the rising end portion 9 of the component conveying track 3 provided in the vibration ball (FIGS. 5 and 5). 10, see FIG.

  The sorting plate 8 is slanted so that the outer side (ball wall side) of the component runway continuous with the end of the track is higher and the inner side (ball center side) is lower. In this case, a guide 11 (side plate) is provided which is about 0.5 mm to 1.0 mm higher than the height of the welding nut when the welding projection is directed in the direction of gravity (downward). In the middle of the guide 11, for example, a part removing means for removing only a welding nut having an abnormal posture (in this case, also called a defective posture, the direction of the welding projection being opposite to the gravity direction, that is, upward) is removed. An exclusion notch 16 in which the side plate is notched is provided (see FIGS. 6, 9, and 10).

  A sorting rail 12 having a convex section is formed in the component passage of the sorting plate 8 in the longitudinal direction in which the welding nut advances. The welding nut in the normal posture can pass through the welding projections P positioned at the four corners of the welding nut so as to cross over the sorting rail (see FIG. 6). However, in the case where the protrusion is an upwardly defective posture nut, the welding nut N slides on the sorting rail 12 inclined inward and is stored in the ball (see FIG. 7).

  The part runway widths A1 and A2 on both sides of the sorting rail 12 that allow the welding nut to run in a normal posture are fixed to one inner runway width A1, and the other outer runway width A2 is a length formed in the width direction. It is adjusted by the width adjusting plate 13 that can be adjusted within the allowable range of the hole S (see FIGS. 2 and 9).

  In this case, the width adjusting plate 13 is attached to the sorting plate 8 by two bolts B2. The width adjustment plate A2 is arranged so that the position in the width direction can be adjusted within a range of 0.5 mm to 1.0 mm with respect to the shape dimension a2 of the projection of the welding nut. 13 is assembled on the side of the sorting plate 8 through a bolt B2 in the long hole S formed in 13 (see FIGS. 2 and 8).

  Above the sorting rail 12, a presser plate 14 is attached by a bolt B3 by inserting a collar 15 suitable for a height allowing passage of only a nut height in a normal posture. In this case, the collar 15 having a dimension H which is 0.5 mm higher than the height h of the welding nut in a normal posture is prepared depending on the number of bolts B3, and the presser plate 14 and the sorting plate 14 are selected to adjust the height from the sorting rail 12. The collar 15 is inserted between the plates 8 and attached by bolts B3 (see FIG. 9).

  The guide 11 is configured to be slightly higher than the height h of the normal nut on the lower side of the presser plate 14 except for the exclusion notch 16 formed in the part traveling direction (see FIGS. 6 and 9).

  Each dimension of the component selection unit corresponds to each dimension of the supply nut as shown in FIGS. That is, A1-a1, A2-a2, Bb, Hh, Mm. Since the dimensions A1, B, and M of the sorting plate 8 are fixed, only the sorting plate 8 is replaced when the specifications do not match the dimensions of the supply nut.

  An unloading base 17 fixed to the support plate 22 is attached to the front surface of the support plate 23 fixed to the sorting plate 8 via a bolt B4 at the tip of the component running path of the sorting plate 8 that travels along the guide 11. It is attached. A component supply tube 18 (including a hose or a square tube made of vinyl material or urethane rubber material) made of a material having flexibility and transparency is connected to the unloading cap 17 (see FIGS. 1 to 4).

  The tip of the supply tube 18 is connected to a feeder unit incorporated in a resistance spot welder, which is omitted in the drawing. An air nozzle 19 having an air outlet 20 facing the supply tube is attached to the unloading base 17. Compressed air is ejected from the air outlet 20 of the air nozzle 19. At the moment when the compressed air is injected, the normal nut is blown off from the base into the component supply tube and sent to the feeder unit attached to the spot welder.

  The mounting angle of the air outlet 20 of the air nozzle 19 is designed so that the compressed air to be discharged flows smoothly without swirling, and whether it is discharged from between the two collars 15 other than the mounting position described above. Alternatively, the pressing plate 14 may be disposed toward the unloading base 17.

  Reference numeral 21 denotes a second wiper. By gradually narrowing the part passage width of the transport truck 3 toward the inside of the ball near the presser plate 14 of the final part 9 of the transport track, the weld nut N group that has passed near the center of the sorting plate 8 is removed from the presser plate 14. The final sorting and alignment are performed in a fixed direction on the near side of the lower passage (see FIG. 10).

  In this case, as shown in FIG. 6, only the normal welding nut N with the welding projection P facing downward passes smoothly under the second wiper 21, but the welding nut with the welding projection P facing upward is the second wiper 21. And is dropped from the excluded notch 16 (see FIG. 7).

  Then, the welding nut N in the normal posture passes through the exclusion notch 16 and enters under the presser plate 14 as shown in FIG. 9, and advances along the guide 11 which is higher than the height of the normal nut. When the welding nut N proceeds as it is and is sent to the unloading base 17, a feeder unit attached to the spot welder flows through the component supply tube 18 in the direction of the arrow at the moment when compressed air is injected from the air outlet 20. (See FIG. 1).

  From the feeder unit, the spindle is moved forward by the air cylinder and supplied to the workpiece set on the guide pin of the lower electrode for welding.

  In the present invention, the method and apparatus for sorting the front and back of the welding nut are unitized as a single unit, and the vibration ball main body is shared, and only the part sorting unit 7 can be easily replaced or partly adjustable. By adapting to this, the dimensions of the supply parts can be changed with a simple structure.

  If the separation plate 8 is prepared so that it can be replaced when the distance A1 between the guide 11 and the sorting rail 12 does not match the dimensions of the supply parts, it is possible to sort the parts out of specification. become.

  FIG. 16 and subsequent figures show an embodiment of the third invention. In this embodiment, a case where a blade-type track is used for a component selection unit installed in a vibration ball for supplying a welding nut is shown. FIG. 16 is a plan view of the present invention. FIG. 17 is an external view showing assembly components of the component selection unit according to the embodiment of the present invention. FIG. 18 is an external view when the component selection unit of the embodiment according to the present invention is assembled to a vibration ball.

  FIG. 19 is a schematic view when a welding nut in a normal posture rides on a blade-type track and passes under a second wiper (hereinafter also simply referred to as a wiper). FIG. 20 is a schematic view when a welding nut in an abnormal posture rides on the blade type sorting plate and a welding projection is guided under the second wiper and removed from the track on the track into the ball. FIG. 21 is an external view of a parts selection unit showing another embodiment of the third invention.

  In the embodiments of the present invention shown in FIGS. 16 to 20, the same reference numerals are used for parts having the same functions and configurations as the symbols used in the first embodiment of the present invention.

  When the vibration ball feeder 2 that accommodates the welding nut is vibrated, the vibration type part feeder 1 shown in FIG. 16 starts moving randomly from the separation bottom 4 and starts to move in the centrifugal direction. Accordingly, the spiral component transporting track 3 is raised, and the front and back of the components are selected and aligned on the way, and sequentially sent to the target location.

  A first wiper 6 projecting inward from the ball wall 5 is disposed in the upper part of the part transporting track 3, and the wiper 6 narrows the part track width of the transporting truck 3 toward the inside of the ball, In addition, the parts overlap each other and pass through the part runway with a constant height, and the welding nut N is carried on the parts conveyance truck 3 at random regardless of the front and back sides. Further, as shown in FIG. 12, the excessive parts that are carried out with the parts overlapping each other are caught by the first wiper 6 and are removed from the runway.

  In the first embodiment, the component selection unit 7 is arranged in a straight line near the component discharge port from the rising end of the component conveying track 3 arranged in the ball, whereas the replaceable component selection unit 70 of the second embodiment is shown in FIG. As shown in the detailed views of FIGS. 16 to 18, they are arranged on the same circumference as the ball wall 5.

  That is, as shown in FIG. 17-18, a base having a curved surface shape that matches the circumferential curved surface of the ball wall at an opening portion 73 formed by cutting out a part of the ball wall in the vicinity of the component discharge port into a concave shape. The plate 71 is detachably assembled.

  In this case, the part selection unit 70 according to the third invention is composed of three main parts based on the base plate 71, the blade type selection plate 72 (also referred to as the blade type track) and the second wiper 21. The base plate 71 is detachably attached to a part of the opening portion 73 with three bolts B5 from the outside of the ball wall. Further, for example, bolt holes provided at three locations on the base plate 71 side are arranged in the circumferential direction of the ball wall so that the position of the base plate 71 can be adjusted in the circumferential direction of the ball (the direction of the left and right arrows in FIG. 18). An elongated elliptical hole S1 is formed.

  The position of the base plate 71 can be adjusted by the allowable range of the elongated hole S1. The base plate 71 is attached by inserting a bolt B5 from a long hole S1 of the base plate 71 into a tap hole provided at a predetermined position on the ball wall side.

  A closing plate 74 for closing the opening 73 is attached to the ball wall at the opening portion on the opposite side to the mounting side of the base plate 71. In the closing plate 74, bolt holes of the closing plate 74 are formed as elliptical elongated holes S <b> 2 extending in the circumferential direction of the ball so that the movement of the closing plate 74 can be adjusted in the closing direction. The closing plate 74 is attached by inserting a bolt B6 from a long hole S2 of the closing plate 74 into a tap hole of the ball wall.

  The blade type selection plate 72 is a flat plate bent along the inner curved surface of the base plate 71, and the cross-sectional shape of the track surface is formed in a saw blade shape. The blade mold in this case is a so-called slant so that a five-blade blade groove is formed long in the component advancing direction and the inner side gradually decreases in the normal direction perpendicular to the outer curved surface of the base plate 71. It is on a track. As a result, the welding nut in the normal direction is guided and transported by the welding projection that has entered the blade groove, and the welding nut in the reverse direction falls into the ball from the inner inclined track without being caught in the blade groove. To do.

  The blade type sorting plate 72 is attached by a bolt B7 so that the position of the blade type track surface can be adjusted in the vertical direction so that the tip of the blade type track surface is lower than the height of the end of the track on the extension of the component conveying track 3. Yes. Further, on the inner side of the track surface of the blade type sorting plate, a short guide rail 77 having a diameter of about 5 mm to 7 mm and a length of about 10 mm to 20 mm is provided in the component traveling direction on a support plate 78 fixed to the tip of the blade type sorting plate. It is fixed towards. The welding nut sent from the conveyance track 3 by the guide rail is guided along the guide rail 77 and delivered to the track surface of the blade type sorting plate 72.

  The size of the blade-type groove of the blade-type sorting plate 72 varies depending on the type of the weld nut and the shape and size of the supply component, but the blade-type sorting plate 72 is replaced according to the shape and size of the supply component. It can respond. The blade type sorting plate 72 is generally a part made of carbon steel for machine structure, and the runway is hardened to reduce wear. Further, the blade type selection plate 72 can be manufactured at low cost by rod production by using a standard blade type.

  The second wiper 21 (referred to as a wiper in the claims) is above the blade type sorting plate 72 and is attached to the base plate 71 with two bolts B10 as shown in FIGS. 17 and 19-21. The wiper is refracted in the direction crossing the track surface from the mounting position, and is selected based on the component size difference between normal parts passing under the wiper and abnormal parts that are not. The wiper 21 can be adjusted in position by a long hole S4 that is long in the vertical direction.

  An unloading base 17 fixed to the support plate 75 is attached to the base plate 71 fixed to the vibration ball wall by a bolt B8 at the tip of the component running path of the sorting plate 72. On the entrance side of the base, a guide plate 81 extending by about 5 mm to 10 mm is attached to the track surface by welding.

  As shown in FIG. 17-18, the base 17 is formed on the support plate 75 at the tip on the base plate 71 side so that the position (height) can be adjusted in the direction of the vertical arrow with respect to the blade type selection plate 72. Bolt holes corresponding to the two tapped holes b formed in the base mounting plate 76 at the L-shaped notch are provided, and the bolt holes are formed in an elliptical long hole S3 extending in the vertical direction. .

  The base 17 is attached to the tip of the blade type sorting plate 72 by inserting a bolt B8 with the elongated hole S3 of the support plate 75 aligned with the tap hole of the mounting plate 76 so that the position can be easily adjusted and aligned. Yes.

  As shown in FIG. 16, a component supply tube 18 (including a hose or a square tube made of a vinyl material or a urethane rubber material) made of a material having flexibility and transparency as shown in FIG. Has been.

  Although not shown in the drawings, the tip of the supply tube 18 is connected to a feeder unit incorporated in a resistance spot welder, as in the first embodiment. An air nozzle 19 is attached to the unloading base 17 so that the air blowing port faces the supply tube 18. Compressed air is injected from the air outlet of the air nozzle 19. At the moment when the compressed air is injected, the normal nut is blown off from the base into the component supply tube 18 and sent to a feeder unit attached to the spot welder.

  According to the third aspect of the present invention, a blade-type track is incorporated in one of the component parts of the component selection unit, and the blade-type track 72 corresponds to the curved shape of the ball wall 5 that can be attached to and removed from the opening portion 73 of the ball wall 5. The base plate 71 is attached along the inner curved surface.

  The base plate 71 is provided with a second wiper 21 for selecting only a reverse nut among the welding nuts transported on the blade-type track 72 by the height difference, and passed below the wiper 21. Only the regular nut is sent out by compressed air through the tube 18 from the unloading base 17 connected to the tip of the blade-type track 72.

  Thus, in the case of the conventional type in which the blade type track is arranged linearly in the vicinity of the parts exit of the vibration hopper, the welding nut in a normal posture may fall from the blade type track by vibration depending on how the projection P is applied to the blade type groove. Yes, the blade type sorting method has been one of the factors that reduce the sorting ability. However, according to the third invention, the component sorting unit 70 of the blade type track 72 is installed on the same circumference as the vibration direction of the hopper. As a result, since the driving direction acting on the welding nut coincides with the vibration direction transmitted in the centrifugal direction of the blade-type track 72, it can be transported with a stable and continuous movement from the component conveying track, and the sorting accuracy can be greatly improved. it can.

  FIG. 21 is a perspective view showing another embodiment of the component selection unit 70 according to the third invention. In this case, the component selection unit 70 includes a base plate 71, a blade type selection plate 72 (also referred to as a blade type track), and a press plate 79 in addition to the three main components based on the second wiper 21. .

  The presser plate 79 corresponds to the presser plate 14 disposed above the sorting rail shown in the first embodiment, and may be omitted because it is not an essential component in the second embodiment. When the sorting function or durability of the second wiper 21 is supplementarily supplemented according to the size of the weld nut, the presser plate 79 is interposed between the second wiper 21 attached to the base plate and the unloading cap 17. Placed in.

  In this case, the presser plate 79 crosses the inner wall of the base plate 71 at a substantially right angle and passes only the normal welding nut that has passed through the wiper with respect to the running surface of the blade type sorting plate 72 inclined to the inside of the ball. Arranged in parallel at the height position allowed.

  A mounting plate 80 that intersects with the presser plate 79 at a substantially right angle is fixed by welding, and a long hole (not shown) that is elongated in the vertical direction in the mounting plate 80 is provided in the base plate 71. The bolt B9 is inserted and attached in accordance with the tap hole. The height of the presser plate 79 can be adjusted in the vertical direction with respect to the blade-type track surface by the allowable range of the long hole of the bolt B9.

  An unloading base is connected to the tips of the blade type sorting plate 72 and the presser plate 79, and a guide plate 81 extending about 5 mm to 10 mm on the track surface is attached to the entrance side of the base by welding. . The guide plate 81 guides a normal welding nut to be higher by about 5 mm to 10 mm than the blade-type track surface for guiding a normal welding nut from the front of the blade-type sorting plate to the entrance side of the transfer die.

  As shown in FIG. 19-20, only the normal welding nut N passed through the lower side of the second wiper 21 passes smoothly from the lower side of the presser plate 79 and is connected to the tip of the blade-type track 72. The compressed air is sent out through the tube 18. The welding nut N having the welding projection P in the opposite direction is blocked by the second wiper 21 and is detached from the blade type sorting plate 72.

  In the embodiment of the present invention, reference is made to the front and back selection of the welding nut having the welding projection in the resistance welding field. However, the parts selection unit replacement system of the present invention is a supply device for various assembly processed parts according to the shape size of the supply parts. It can be applied to other uses.

It is a schematic plan view which shows Example 1 of the vibration type welding nut supply apparatus for enforcing the method of 1st invention. It is a top view which shows the Example of the welding nut front-and-back components selection unit of 2nd invention, and shows a detailed structure concretely. FIG. 3 is a view as viewed in the direction of arrow A in FIG. 2 in the embodiment of the component selection unit according to the second invention. FIG. 4 is a view as viewed in the direction of arrow B in FIG. 3 in the embodiment of the component selection unit of the second invention. It is a schematic sectional drawing which shows the ball main body attachment of the component selection unit of 2nd invention, the assembly | attachment structure of a unit component, and a component travel path. It is sectional drawing which shows the form which the welding nut of a normal attitude | position passes through the 2nd wiper 21 while passing the components selection unit of 2nd invention, and D arrow line view of FIG. It is sectional drawing which shows the form in which the welding nut of an abnormal attitude | position which is passing the 2nd invention components selection unit is blocked | interrupted by the 2nd wiper, and falls. It is sectional drawing which shows the relationship between the structure of the sorting board 8 with a selection rail contained in the parts selection unit of 2nd invention, and the width adjustment board 13 for adjusting the external dimension of a welding nut, and the space | interval of a components travel path. It is sectional drawing which shows the structure of the selection board 8 with a selection rail contained in the components selection unit of 2nd invention, and the relationship between the outer dimension of a welding nut, and the holding plate 14 for adjusting the height of a components travel path. It is a schematic plan view which expands and shows the welding nut which passes the components selection unit of the 2nd invention apparatus. It is CC arrow line view of FIG. Although the form which regulates a welding nut conveyance amount with the 1st wiper 6 is shown, it is a schematic diagram. FIG. 10 is a schematic cross-sectional view showing a welding nut in a normal posture that travels along the guide rails of two large and small metal round bars arranged on the track, showing a transport track structure of a conventional apparatus. FIG. 9 is a schematic cross-sectional view showing a welding nut in a normal posture across a blade-shaped track from a long and narrow round bar guide rail. FIG. 9 is a schematic cross-sectional view showing a part selection system of a conventional apparatus and showing a form in which a welding nut in an abnormal posture is removed from a blade-type track and dropped. It is a top view which shows the Example of 3rd invention. It is an external view which shows the assembly component of the components selection unit which concerns on the Example of 3rd invention. It is an external view at the time of assembling the component selection unit of the Example concerning 3rd invention to a vibration ball. FIG. 3 is a schematic view when a welding nut in a normal posture passes on the lower side of a second wiper (hereinafter also simply referred to as a wiper) on a blade-type track. FIG. 6 is a schematic view when a welding nut in an abnormal posture rides on a blade type sorting plate and a welding projection is guided under the second wiper and removed from the track running path into the ball. It is a perspective view of the components selection unit which shows the other Example concerning 3rd invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibratory parts feeder 2 Vibrating ball 3 Conveying track 4 Separation bottom 5 Ball wall 6 First wiper 7 Parts selection unit 8 Sorting plate 9 Ascending terminal part 10 Fixed support plate 11 Guide 12 Sorting rail 13 Width-adjusting plate 14 Presser plate 15 Color 16 Parts removal means (excluded notch)
17 Unloading base 18 Supply tube 19 Air nozzle 20 Air outlet 21 Second wiper N Weld nut 70 Parts selection unit 71 Base plate 72 Blade type selection plate (blade type track) 73 Opening portion 74 Closing plate 75 Support plate 76 Base attachment plate 77 Guide rail 78 Support plate 79 Presser plate 80 Mounting plate 81 Guide plate

Claims (11)

  When a welding nut is put on a parts transporting track that is spirally arranged along the inner wall of the vibration ball of the parts feeder, and the welding nut is sent out from the part discharge port at the rising end of the truck toward the target location while sequentially aligning , By detachably attaching a parts selection unit for discriminating the normal posture and abnormal posture of the welding nut in the vicinity of the ball component discharge port, depending on the type and / or size of the welding nut to be used. Only the sorting unit can be replaced, and the parts sorting unit, which is detachably attached in the vicinity of the ball part discharge port, discharges the welding nut in an abnormal position to the outside of the parts transport track, and allows only the welding nut in a normal position to pass. In the vibration-type component supply method in which the components are sent toward the target location, the component selection unit includes the melting component. A sorting plate for guiding the nut, a sorting rail provided in a direction in which the welding nut of the sorting plate travels, and a width adjusting plate for regulating a distance between parts traveling to the selecting rail. A vibration type component supply method that can be moved and adjusted in the direction of the sorting rail according to the size.   A parts sorting unit detachably attached in the vicinity of the ball part discharge port includes a sorting plate for guiding the welding nut, and welding protrusions provided along the sorting plate and positioned on both sides of the welding nut in a normal posture. A sorting rail that can be crossed by a portion, and a presser plate that is located above the sorting rail and that is provided at a height that allows only a welding nut in a normal position to pass through. The vibration-type component supply method according to claim 1, wherein height adjustment from the sorting rail can be performed according to the condition.   A parts feeder for supplying a welding nut onto a panel work in order to perform pressure welding of the welding nut and the panel work with an upper electrode and a lower electrode of a resistance spot welder. A spiral ball along the inner wall of the vibrating ball for accommodating the vibrating ball and the welding nut in the vibrating ball to be continuously transferred to the ball component discharge port while being sequentially aligned on the ball vibration And a parts selection unit for selecting a normal posture and an abnormal posture of the welding nut detachably attached in the vicinity of the component discharge port of the ball. , A parts selection unit removably attached in the vicinity of the parts outlet of the ball includes a sorting plate for guiding the welding nut; A sorting rail that is provided along the sorting plate and that allows only a welding nut in a normal posture to pass by a gap formed between a welding projection of the welding nut and the transport surface of the track; and above the sorting rail A vibration-type component supply device consisting of a presser plate that allows only a welding nut in a normal posture to pass by a height difference.   The parts sorting unit has a sorting plate having at least a part of a parts runway having an exclusion portion that is inclined downward from the inner wall of the ball toward the inside of the ball so that only abnormally welded nuts fall outside the runway; A sorting rail provided along the sorting plate and capable of straddling the welding projections located on both sides of the welding nut in the normal posture, and above the sorting rail, allowing only the welding nut in the normal posture to pass. The vibration-type component supply device according to claim 3, comprising a presser plate provided at a height.   The component sorting unit includes a sorting plate that guides a welding nut, a sorting rail provided in a direction in which the welding nut of the sorting plate travels, and a width adjusting plate that regulates a component traveling distance from the rail. The vibration type component supply device according to claim 3 or 4, wherein the moving plate can be moved and adjusted in the rail direction according to the size of the welding nut.   The parts sorting unit includes a sorting plate for guiding a welding nut, a sorting rail provided along the sorting plate and capable of straddling welding protrusions positioned on both sides of a welding nut in a normal posture, and the sorting rail. And a presser plate provided at a height that allows only a weld nut in a normal posture to pass through, and the presser plate can be adjusted in height from the sorting rail according to the size of the weld nut. The vibration type component supply apparatus according to claim 3, 4 or 5.   A parts feeder for supplying a welding nut onto a panel work for pressure welding a welding nut having a projection for welding and the panel work with an upper electrode and a lower electrode of a resistance spot welder. The feeder is a vibrating ball that accommodates the welding nut, and the welding nut in the vibrating ball is placed on the ball vibration and sequentially transferred toward the component outlet of the ball while being sequentially aligned. A component selection unit for selecting a normal posture and an abnormal posture of a component conveying track arranged spirally along the inner wall of the vibration ball and the welding nut detachably attached in the vicinity of the component discharge port of the ball In the vibration type component supply apparatus comprising: A curved surface that is detachably attached to the opening where the ball is cut and substantially conforms to the curved surface of the ball is directed toward the normal direction of the base plate constituting a part of the inner wall of the ball and the outer curved surface of the base plate. The blade type sorting plate which is inclined so that the inner side gradually becomes lower and is disposed on the extension of the component transporting track, and the height dimension difference between the normal posture and the abnormal posture above the blade type sorting plate. Vibrating component supply device consisting of a wiper that allows only normally specified welding nuts to pass through.   The vibration-type component supply device according to claim 7, wherein the track surface of the blade-type sorting plate has a blade-shaped groove in cross-sectional shape.   An unloading base is arranged at the tip of the sorting plate, and a regular welding nut divided on the track of the sorting plate is air blown from the unloading base to a feeder unit connected to the tube tip via a component supply tube. The vibration type component supply apparatus according to claim 7, wherein the vibration type component supply device is supplied in the above.   The vibrating component supply device according to claim 7, 8 or 9, wherein the unloading base is attached to the base plate side via a support plate so that the position can be adjusted.   A presser plate is disposed between the wiper attached to the base plate and the unloading base, and the presser plate intersects the inner wall of the base plate at a substantially right angle and is inclined toward the inside of the ball. 11. The vibration component supply device according to claim 7, wherein the vibration component supply device is disposed substantially parallel to a track surface at a height position allowing only a normal welding nut that has passed through the wiper.

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