JP5281255B2 - Parts inspection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a parts inspecting device capable of preventing catch of a workpiece when feeding a workpiece, which reaches the terminal end of a rail unit, to a rotary unit. <P>SOLUTION: This parts inspecting device 1 comprises a rotary table 21 having neck suspending parts provided with a predetermined pitch in the periphery and to be always rotated at a constant speed, a rail unit 10 continuously provided to the rotary table 21 so as to feed workpieces S to the neck suspending parts, and an inspection unit 30 for inspecting the fed workpieces S. The conveyance terminal end of the rail unit 10 comprises an opening/closing member 14 structured to be opened/closed in response to the pushing force applied from the outside. The opening/closing member 14 is structured to be opened forward in the rotating direction of the rotary table 21 in the case wherein the rotary table 21 pushes the opening/closing member through the workpiece S. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a component inspection apparatus that performs an outer shape inspection of a headed component (for example, a screw, a nail, a bolt, and a rivet).

  Conventionally, as a device for inspecting the outer shape of a headed component, there is a component inspection device disclosed in Japanese Patent Publication No. 60-35003. The component inspection apparatus includes a rotary table that continuously rotates in a horizontal plane by driving a drive source, a guide member that is disposed close to a half of the circumference of the rotary table, and the guide member and the rotary table. A supply guide that feeds screws in between, a nozzle that injects the air compressed by the compressor onto the screws conveyed to the tip of the supply guide, and a screw that inspects and removes the screws that move between the rotary table and the guide member Inspection means. Further, the rotary table has triangular notches formed at regular intervals on the circumference thereof, and the notches hold the screws in a suspended state. In the component inspection apparatus configured as described above, the screw is rapidly fed into the notch of the rotary table by injecting air onto the screw conveyed to the tip of the supply guide. Therefore, this component inspection apparatus can prevent the screw from being caught between the supply guide and the rotary table.

JP-B 60-35003

  In order for the component inspection apparatus to exhibit the above-described action, a compressor for compressing and injecting air is required. However, since this compressor is always driven other than when air is injected, the component inspection apparatus has an environmental problem due to noise and energy waste.

  In the present invention, the headed component is fed into the notch of the rotary table without using the drive device such as the compressor having the above-described problems, and the headed component is engaged between the supply guide and the rotary table. Provided is a component inspection device that prevents the insertion of a component.

The component inspection apparatus of the present invention has been created in view of the above-described problems, and the head-mounted component is suspended from a neck hanging portion formed by cutting out the outer periphery at a predetermined pitch, and rotated in accordance with the driving of the rotation drive source. A head part is suspended from a turntable configured to be transported, and a headed part is suspended and sequentially aligned and transported, and the end of the transport rail is connected to the outer periphery of the turntable with a predetermined gap. It is arranged to supply headed parts to the rotary table, and the tip of the transport rail is spring-opened and is usually located on an extension line of the other part of the transport rail by the bias of the spring When the headed part on the transport rail is transferred to the rotary table, and the headed part bites between the rotary table and the front end of the transport rail, the front end of the transport rail Headed part Comprised is pressed, and the rail unit, configured to run away against the bias of the spring, an inspection unit for inspecting the appearance of the supported headed parts hanging portion of the rotary table. The neck hanging portion of the rotary table is formed of a support surface formed by cutting the outer periphery of the rotary table into a U shape and a guide surface formed by further cutting the support surface in the rotation direction of the rotary table. It is preferable.

  The component inspection apparatus of the present invention is configured to be openable and closable according to the pressing force received from the outside on the conveyance end end side of the opening and closing rail. For this reason, when a work is sandwiched between the open / close rail and the rotary unit, the rotary unit presses the final end side of the open / close rail via the work, so the open / close rail final end side opens. As a result, the clamped work is released, so that the work exerts an action of feeding it to the neck hanging portion of the rotary unit. Due to this action, the parts inspection apparatus of the present invention eliminates an emergency stop due to the biting of the workpiece, so that the operating rate of the apparatus can be increased.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a component inspection apparatus that performs an outer shape inspection of a screw S that is an example of a component to be inspected. The parts inspection apparatus 1 includes a bowl feeder (not shown) attached to the machine base 2, a rail unit 10 connected to the bowl feeder, a rotating unit 20 connected to the rail unit 10, and And an inspection unit 30 for inspecting the screw S on the rotation unit 20.

  The bowl feeder has a storage bowl (not shown) capable of storing a plurality of screws S, and the storage bowl is provided with a conveyance path (not shown) extending spirally along the inner wall surface thereof. ing. The storage bowl is configured to vibrate by a built-in vibrator (not shown), and the screw S is sequentially sent to the rail unit 10 in response to the vibration.

  As shown in FIGS. 3 to 6, the rail unit 10 includes a straight rail 11 and an open / close rail 12. One end of each of the rails 11 and 12 is connected to a conveying path of the bowl feeder. The screws S sent from the transport path are supported in a hanging manner and are arranged in parallel with a transportable interval. The rail unit 10 is mounted on a vibration device (not shown) mounted on the upper surface of the machine base 2 and is configured to align and convey the screws S in response to the vibration. Yes.

  As shown in FIG. 2, the opening / closing rail 12 has a fixing member 13 and an opening / closing member 14, and one end of the fixing member 13 is connected to the conveying path of the bowl feeder. On the other hand, an opening / closing member 14 is hingedly attached to the other end of the fixing member 13 via a shaft 15 and a torsion spring 16. Specifically, a convex-shaped convex portion 14 a is formed at one end of the opening / closing member 14, while a concave-shaped concave portion 13 a is formed at the other end of the fixing member 13. Further, a part of the convex portion 14a of the opening / closing member 14 is notched, and the two torsion springs 16 disposed above and below are interposed in the notch portion 14b in FIG. In this manner, the convex portion 14a of the opening / closing member 14 is engaged with the concave portion 13a of the fixing member 13 with the torsion spring 16 interposed in the notch portion 14b of the convex portion 14a of the opening / closing member 14. In this engaged state, the shaft 15 passes through the concave portion 13 a of the fixing member 13 and the convex portion 14 a of the opening / closing member 14 and is inserted so as to be fitted to the torsion spring 16.

  As shown in FIG. 3, the torsion spring 16 is configured such that the elastic force becomes zero at a position where both ends of the torsion spring 16 are orthogonal to each other. In this orthogonal state, one end of the torsion spring 16 is opened and closed. It interposes so as to contact the member 14. A movable slope 14 c is formed at a location where the opening / closing member 14 contacts the torsion spring 16. On the other hand, the other end of the torsion spring 16 is in contact with the fixing member 13, and a fixed slope 13 b is formed at a location where the fixing member 13 contacts the torsion spring 16. In the fixing member 13 and the opening / closing member 14, the angle θ formed by the extension line of the movable slope 14 c formed on the opening / closing member 14 and the extension line of the fixed slope 13 b formed on the fixing member 13 is 90 °. It is configured. Therefore, in the state shown in the figure, the elastic force of the torsion spring 16 is zero. In the open / close rail 12 having such a configuration, as shown in the drawing, when a predetermined force is applied to the open / close member 14, the torsion spring 16 is twisted and the open / close member 14 supported by the shaft is 15 is configured to open forward in the rotational direction of the rotary table described later, with 15 as a fulcrum.

  The rotating unit 20 has a rotating table 21 that rotates at a constant speed in the direction of the arrow Y1 as shown in FIG. 1 when driven by a servo motor (not shown) that is an example of a rotation driving source. The turntable 21 has a circular shape in plan view. The rotary table 21 has a plurality of neck hanging portions 22 that support the screws S in a hanging manner around the circumference thereof. A guide member 23 is attached along the circumference of the rotary table 21, and the guide member 23 is configured so that the screw S supported by the neck hanging portion 22 does not fall.

  The neck hanging portion 22 includes a guide surface 22a and a support surface 22b that holds the screw S. The guide surface 22 a is configured to guide the screw S to the support surface 22 b and is formed by cutting in the reverse rotation direction of the rotary table 21. Further, the support surface 22 b is connected to the final cut end, and the support surface 22 b is configured to be curved at a predetermined rate in the center direction of the rotary table 21. In the neck hanging portion 22 having such a configuration, as shown in FIG. 3, the screw S supplied from the rail unit 10 is guided to the support surface 22b by the guide surface 22a without any trouble.

  The inspection unit 30 analyzes an area sensor 31 arranged to be able to scan the head of the screw S on the rotary table 21, and a silhouette image of the screw S obtained from the scanning result of the area sensor 31, thereby A processing unit (not shown) for comparing the obtained dimension data of each part of the screw S with reference dimension data set in advance and determining whether the screw S is a good product or a defective product, The distribution unit 32 for kicking off the screw S determined as a defective product in the determination result by the processing unit, the defective product discharge port 33 through which the screw S kicked by the distribution unit 32 is discharged, and the inspection unit 30 The judged screw S is constituted by a non-defective product discharge port 35 through which the screw S is discharged by the sorting plate 34.

  Hereinafter, the screw S biting prevention action and effect by the open / close rail 12 which is the main part of the present invention will be described. First, in the rotary table 21 rotating at a constant speed, as shown in FIG. 4, the screw S reaching the final end of the rail unit 10 may be sandwiched between the support surface 22 b of the neck hanging portion 22 and the opening / closing member 14. At this time, since the rotary table 21 continues to rotate counterclockwise, the support surface 22b further presses the screw S. Therefore, as shown in FIG. 5, the screw S presses the fixing member 13, and the fixing member 13 presses the torsion spring 16 in the winding direction of the torsion spring 16 with a predetermined force. As a result, the torsion spring 16 is twisted, and the opening / closing member 14 supported by the shaft is opened to the position shown in FIG. The screw S is guided to the support surface 22b by opening the fixing member 13. Then, as shown in FIG. 6, the screw S is fed into the support surface 22 b, and as a result, the fixing member 13 is urged to the normal position by the torsion spring 16. Due to these actions, in the component supply apparatus of the component inspection apparatus 1 of the present invention, the screw S is not sandwiched between the open / close rail 12 of the rail unit 10 and the neck hanging portion 22 of the rotary unit 20. The screw S is reliably and stably performed from the end to the support surface 22b of the neck hanging portion 22 in the rotary unit 20. Therefore, compared with the conventional air transfer type, the present invention reduces the transfer error of the screw S, and can increase the operating rate of the component inspection apparatus 1 of the present invention.

It is a principal part enlarged plan view of the component inspection apparatus which concerns on this invention. It is a principal part expanded sectional view of the components inspection apparatus which concerns on this invention. FIG. 3 is an enlarged cross-sectional view of a main part of the component inspection apparatus according to the present invention in plan view. It is a figure which shows the operation state of the components inspection apparatus which concerns on this invention, and is a figure of the moment in which a screw bites. It is a figure which shows the operation state of the components inspection apparatus which concerns on this invention, and is a figure which shows the open state of the fixing member of a rail unit. It is a figure which shows operation | movement of the components inspection apparatus which concerns on this invention, and is a figure which shows the state which the open fixing member returned to the normal position.

Explanation of symbols

1 Parts inspection device 2 Machine base 10 Rail unit
11 Straight rail 12 Open / close rail 13 Fixed member 13a Concave portion 13b Fixed slope 14 Open / close member 14a Convex portion 14b Notch portion 14c Movable slope 15 Shaft 16 Torsion spring 20 Rotating unit 21 Rotating table 22 Neck hanging portion 22a Guide surface 22b Support surface 23 Guide member 30 Inspection unit 31 Area sensor 32 Sorting section 33 Defective product discharge port 34 Sorting plate 35 Non-defective product discharge port S Screw

Claims (2)

A rotary table configured to suspend a headed part from a neck hanging part formed by cutting out the outer periphery at a predetermined pitch and rotate in accordance with the driving of a rotary drive source;
The headed parts are suspended from the transport rail and are sequentially aligned and transported, and the front end of the transport rail is connected to the outer periphery of the rotary table so as to be connected with a predetermined gap. The leading end of the transport rail is opened and closed by a spring, and the headed parts on the transport rail are normally positioned by being positioned on an extension line of other parts of the transport rail by the bias of the spring. If the headed component is caught between the rotary table and the end of the transport rail while being transferred to the rotary table, the end of the transport rail is pressed by the headed component and attached with a spring. A rail unit configured to escape against the force,
An inspection unit for inspecting the appearance of the headed component supported by the neck hanging portion of the rotary table;
A component inspection apparatus comprising:   The neck hanging portion of the rotary table is formed of a support surface formed by cutting the outer periphery of the rotary table into a U shape, and a guide surface formed by further cutting the support surface in the rotation direction of the rotary table. The component inspection apparatus according to claim 1, wherein:

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