JP2010037013A - Carrying/straightening device and inspection device for screw and washer assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry a screw and washer assembly in a stable hanging posture. <P>SOLUTION: A carrying/straightening device has an A guide 1 comprising an inclined first rail 3 and a head rest 5 and a B guide 2 comprising first and second support plates 7, 8 disposed to face each other with a starting end side inclined and a terminating end side horizontal while gradually decreasing the inclination. The A guide 1 supports a shank 32 and a head 31 of the screw and washer assembly 30, where a clearance is formed between the head of the screw and a second washer 34 in that support state, the first support plate 7 enters the clearance first, and the second support plate 8 enters the clearance late at an opposite position, so that the B guide 2 supports the head of the screw. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention suspends and conveys a washer built-in screw (referred to as a Semus screw), conveys it, and stabilizes the suspended posture in the middle of the conveyance. The present invention relates to an inspection apparatus with improved accuracy.

  The washer built-in screw described in the head is a washer whose hole diameter is smaller than the outer diameter of the screw, incorporated in the lower part of the neck before rolling the screw, and then the screw was rolled to prevent the washer from coming off. It is. As the washer, one spring washer, one plain washer, one spring washer and plain washer each, or a toothed washer is used.

  The screw with a built-in washer is inspected for quality after production, removed from defective products, and shipped. Post-manufacturing inspection includes neck length, head height, screw tip shape, thread pitch, screw outer diameter and head outer diameter, whether or not the thread is missing, and washer mounting leakage. It is done about the quality of the scratches on the head and the operation holes (cross holes, hexagonal holes, Torx screw holes).

  This inspection requires inspection of all products when aiming at complete removal of defective products, but inspection of all products takes time. In view of this, an inspection apparatus capable of efficiently inspecting all the products of the washer built-in screws has been studied, and the present applicant has already proposed such an apparatus in Patent Document 1 below.

  The inspection device proposed in this document is provided with a notch groove at a constant pitch on the outer periphery of a transport table that rotates with a vertical axis as a fulcrum, and a shaft portion of a washer built-in screw is introduced into the notch groove to The washer incorporated in the lower part of the neck is supported by the upper surface of the transport table, and the screws are suspended and transported by rotating the table.

In this inspection device, the screw shaft may be caught by the washer for the washer built-in screw, and the height of the spring washer is not uniform over the entire circumference of the screw incorporating the spring washer. Since there is a specific problem that the inspection becomes unstable because the screw tilts when supported and hung, as a countermeasure, a push-up guide that pushes the washer built-in screw supported on the transfer table by guiding it with the guide surface of the slope, A pressing means for pressing the shaft portion of the washer built-in screw pushed up by this guide against the groove surface of the notch groove on the outer periphery of the conveying table is provided in the middle of the conveying path so as to correct the posture of the screw.
JP 2007-55763 A

  The inspection device of Patent Document 1 improves the stability of the inspection by correcting the hanging posture of the screw, but it is not satisfactory with respect to the inspection accuracy and inspection efficiency. In the inspection apparatus of the same document, when the inspection is performed while rotating the conveyance table, a relative movement occurs between the holding means and the rotation conveyance table, so that the screw pressed against the conveyance table moves, which is the inspection accuracy. There was a problem of lowering.

  In order to improve the stability of the inspection, it is conceivable to stop the conveyance table once the posture of the screw being conveyed has been corrected, and to inspect during that time, but this method reduces the inspection efficiency. As a result, the device becomes less practical.

  If the screw is not in a good hanging position, even if the washer built-in screw is hung with a vibration feeder and transported simply, there will be problems such as clogging of the screw in the transport path due to the tilt of the screw, resulting in poor feeding. Occur.

  In order to eliminate the above-described problems, an object of the present invention is to make it possible to suspend and convey the washer built-in screw in a stable posture.

In order to solve the above-described problems, the present invention provides a conveyance / correction device that suspends and conveys a washer built-in screw and corrects the hanging posture of the screw during the conveyance.
The conveyance / correction device includes a guide (in the present invention, this is referred to as an A guide) including a first rail inclined in a lateral direction and a screw head provided along the first rail. A guide (first and second support plates) in which the start end side is inclined in the same direction as the inclination direction of the A guide, the inclination is gradually reduced, and the end side is horizontal is arranged opposite to each other with the shaft passage interposed therebetween. Is called B guide),
The A guide has a shaft portion of the washer built-in screw on the side face on the back side of the first rail, a first washer under the screw neck on the conveying surface of the first rail, and a screw head. It is configured to support the outer periphery from below with the head rest,
A gap is formed between the head and the washer under the neck of the screw in a state where the washer built-in screw is supported by the A guide, and the first support plate is advanced in the gap by relative movement with the screw. Then, the second support plate enters the gap at the opposite position with a delay, and the B guide is configured to support the head of the screw (first form).

  In the case of a screw having a spring washer and a plain washer or a toothed washer and a plain washer, the A guide supports the plain washer arranged at the forefront, and the gap where the support plate of the B guide enters enters the spring washer or It is generated between the toothed washer and the head of the screw (the same applies to the second form described later).

This conveying / correcting device preferably employs the following configurations (1) and (2).
(1) The A guide includes first and second rails arranged in parallel on the start end side, and the shaft portion of the washer-incorporating screw is introduced into the shaft portion passage between the first and second rails, thereby the first washer. Are supported by the conveying surfaces of the first and second rails, and at least the terminal side is inclined in a direction that falls sideways. The second rail is installed halfway along the conveyance path, and the headrest is installed in place of the second rail on the terminal side of the conveyance path.
(2) The distance in the rail height direction from the first rail to the first support plate between the start end of the first support plate and the start end of the second support plate constituting the B guide is the screw transport direction. Make it bigger forward.

As a second form, the conveying / correcting apparatus according to the present invention lifts the A guide composed of first and second rails arranged in parallel and the washer built-in screw supported by the A guide from the conveying surface of the A guide. A push-up tool, and a B guide in which first and second support plates arranged horizontally are arranged opposite to each other with a shaft passage interposed therebetween,
The A guide is configured to introduce a shaft portion of a washer built-in screw into a shaft passage between the rails, and to support the first washer under the screw neck from below with the first and second rails,
The push-up tool is configured to guide and lift a washer built-in screw supported and transported by the A guide by a guide surface of an inclined surface that is in contact with the tip of a shaft portion of the screw. A gap is formed between the head of the washer built-in screw and the washer under the neck of the screw, and the B guide forms a predetermined step with respect to the A guide so that the first and second support plates enter the gap. The B guide is configured to support the head of the screw.

  The A guide can be configured integrally with the parts feeder by modifying a part of the conveying path (exit side part) of a known parts feeder (which feeds while aligning the parts by applying vibration). The parts feeder can be a ball feeder or a straight feeder.

  The present invention also provides an inspection device that suspends and conveys a washer built-in screw by an inspection unit conveyance device, and passes the inspection station during the conveyance to inspect the screw. The inspection apparatus has a screw supply device for supplying a washer built-in screw to the inspection section conveyance device, and the screw supply device includes the conveyance / correction device of the present invention.

  The transport unit of the inspection unit transport device included in the inspection device is configured such that the transport unit can be inserted into a gap between the head of the washer-embedded screw and the washer, and is suspended by the transport / correction device. The washer-incorporated screw with the straightened is transferred from the B guide or a feeder interposed between the B guide and the inspection unit conveying device to the conveying unit, and the washer incorporating screw is conveyed by the inspection unit conveying device at the head of the screw. It is made in support of.

  In addition, although the said inspection part conveyance apparatus can also consider a rectilinear feeder etc., it is comprised by the horizontal arrangement | positioning conveyance table rotated with a vertical axis as a fulcrum, the outer peripheral part of the conveyance table is formed with a plate material, and the outer peripheral part It is preferable to provide a notch groove at a constant pitch on the peripheral edge of the washer so as to receive the lower part of the neck of the washer-incorporating screw at a constant pitch in order to reduce the size of the inspection apparatus.

  The conveying / correcting apparatus of the present invention first supports the washer with the A guide, and creates a gap between the head of the screw and the washer in this situation. Then, the B guide is inserted into the gap, and the screw suspension posture is corrected by supporting the head of the screw with the B guide. For this reason, the screw becomes vertical, and the hanging posture is stabilized, and the movement of the screw during conveyance that leads to deterioration of inspection accuracy and decrease in stability of conveyance is eliminated. This correction principle is the same for both the first and second forms.

  In the case of adopting the configuration of (1) above, since the screw is supported by the first rail and the headrest at the position where the second rail of the A guide is eliminated, the screw with a heavy head washer is also used. Support is stable.

  In the case of adopting the configuration (2), the distance in the rail height direction between the first rail of the A guide and the first support plate of the B guide is large in the forward direction of the screw. In addition, on the installation side of the second support plate, a gap for allowing the support plate to enter between the head portion of the screw and the washer is surely secured, and the transition of the screw from the A guide to the B guide is stabilized.

  In the inspection apparatus according to the present invention, the hanging posture of the washer built-in screw to be inspected is corrected by the transition device, and the corrected screw is transferred to the conveyance unit of the inspection unit conveyance device. The screw is fed into the inspection station with the head supported and maintains a vertical posture during transport. Accordingly, the inspection accuracy is not deteriorated due to the movement or inclination of the screw.

  Moreover, since it is not necessary to stop the conveyance part of a test | inspection part conveyance apparatus, the fall of inspection efficiency does not occur.

  Embodiments of the present invention will be described below with reference to FIGS. 1 to 5 show a first embodiment of the conveying / correcting apparatus of the present invention. The conveyance / correction device 10 according to the first embodiment includes an A guide 1 and a B guide 2.

  The A guide 1 of the exemplary apparatus includes a first rail 3 that is inclined in a direction that falls sideways in the entire region from the start end to the end (a direction that is inclined to the right or left with respect to a vertical line in the transport direction view of FIG. 2), and The second rail 4 is arranged in parallel with the first rail 3, and the screw head rest 5 is provided along the first rail 3.

  The starting end side of the A guide 1 is composed of a first rail 3 and a second rail 4 that are parallel to each other and inclined in the same direction (see FIG. 2), and between the first and second rails 3 and 4. A shaft passage 6 is provided.

  The first and second rails 3 and 4 may be configured such that the starting end side is not inclined, and gradually and greatly tilts in a direction of falling sideways as it goes forward in the transport direction. As shown in FIG. 3, the first rail 3 is configured to support the shaft portion 32 of the screw and the first washer 33 from below at a portion given a predetermined inclination. Further, the second rail 4 disappears from the middle, and as an alternative, a headrest 5 is installed along the first rail 3 on the terminal end side of the conveyance path.

  The B guide 2 has a first support plate 7 and a second support plate 8 whose start end side is inclined in the same direction as the inclination direction of the A guide 1 and whose inclination gradually decreases toward the end side and the end side becomes horizontal. A shaft portion passage 9 is disposed between and opposed to each other. The first support plate 7 has a starting end extending to the A guide side with respect to the second support plate 8 and supports the head of the screw prior to the second support plate 8.

  In the conveyance / correction device 10 according to the first embodiment configured as described above, the A guide 1 receives and aligns the washer built-in screw 30 supplied from a parts feeder (ball feeder or rectilinear feeder) and moves it forward in the conveyance direction. .

  As shown in FIG. 2, the A guide 1 introduces a shaft portion 32 of a washer-incorporating screw 30 into the shaft portion passage 6 between the paired first and second rails 3 and 4, and the first guide is located below the neck of the screw. A single washer (a flat washer in the figure) 33 is supported from below by the first and second rails 3 and 4 (transport surfaces thereof).

  As shown in FIG. 3, the lower first rail 3 supports the first washer 33 from below with the inclined conveying surface 3 a, and also supports the screw shaft 32 on the side surface on the back side. If the inclination angle of the first rail 3 is set appropriately, the second rail 4 is not necessary in this situation. Therefore, a head support 5 is provided on the terminal end side of the conveyance path instead of the second rail, and the head support 5 supports the outer peripheral surface of the head 31 of the screw from obliquely below.

  In that situation, the first washer 33 is supported by the first rail 3 in a state of being biased to one side. Therefore, the first washer 33 is inclined with respect to the shaft portion 32 of the screw supported by the first rail 3, and therefore the second washer 34 is similarly inclined, and the screw head 31 and the second washer 34 are A gap g is formed between them. The support plate of the B guide 2 enters the gap g, and the washer built-in screw 30 is transferred to the B guide 2.

  In the B guide 2, the start end sides of the first and second support plates 7 and 8 constituting the B guide are inclined in the same direction as the rail of the A guide, and the start end of the first support plate 7 is the second support plate. The first support plate 7 arranged on the side where the gap g is generated enters the gap g in advance of the second support plate 8, so that the head of the screw The part 31 is supported (refer FIG. 3).

  In this situation, the first rail 3 of the A guide gradually moves away from the first support plate 7 toward the front in the transport direction. Specifically, the rail height direction from the first rail 3 to the first support plate 7 of the A guide between the start end of the first support plate 7 constituting the B guide 2 and the start end of the second support plate 8. The conveying surface 3a of the first rail 3 is inclined forward and downward on the end point side so that the distance L becomes larger in front of the screw conveying direction.

  As the distance L increases, the positions of the first and second washers 33 and 34 are lowered (the screw is not lowered because the head 31 is supported by the first support plate 7). A gap g is formed between the screw head 31 and the second washer 34 on the side opposite to the installation side, and the second support plate 8 of the B guide 2 enters the gap g (see FIG. 4). In this way, the head 31 of the screw is supported by the first and second support plates 7 and 8 of the B guide 2, and the screw is suspended at the horizontal end side of the first and second support plates 7 and 8. The posture is corrected vertically (see FIG. 5).

  For this reason, the supply of the washer built-in screw 30 to the transport unit 22 such as an inspection device is routed through the transport / correction device 10 of the present invention, thereby supporting the head of the screw and improving the reliability of inspection and the like. it can.

  The purpose of increasing the distance L can also be achieved by inclining the height of the conveyance surface of the first support plate 7 of the B guide forward instead of inclining the conveyance surface of the first rail 3 forward and downward. be able to.

  Further, since the screw can be transported by using a transport force by a supply device such as a parts feeder, the A guide 1 and the B guide 2 may have no function to generate the transport force, but are known. A self-conveying function similar to that of a straight feeder may be added.

  Furthermore, the conveyance / correction device 10 of the first embodiment can configure the A guide 1 with only the first rail. In this case, the entire area of the first rail is inclined.

  6 and 7 show the second embodiment of the conveyance / correction device 10. The conveyance / correction device 10 according to the second embodiment includes an A guide 11 composed of first and second rails 3 and 4 having no parallel inclination and a washer built-in screw 30 supported by the A guide 11. The push-up tool 13 is lifted from the conveying surface of the guide 11 and the first and second support plates 7 and 8 are horizontally arranged and a B guide 12 is formed so as to face the shaft passage 9. . As shown in FIG. 7, it is preferable that the first and second support plates 7 and 8 are tapered at the starting end side of the shaft portion passage 9 so that the shaft portion of the screw is smoothly introduced into the shaft portion passage 9.

  The A guide 11 is configured to introduce the shaft portion 32 of the washer built-in screw 30 into the shaft passage 6 between the rails and to support the first washer 33 under the screw neck from below with the first and second rails. ing. Two of the first and second rails 3 and 4 exist over the entire length of the rail. The A guide 11 can be used by arranging an exit side portion of a known parts feeder conveyance path (in this case, the A guide 11 is integrated with the parts feeder).

  In the B guide 12, the position of the transport surface is set higher than the A guide 11 by a predetermined amount, so that a step h is generated between the A guide 11 and the B guide 12.

  The push-up tool 13 has an inclined guide surface 13a for guiding the washer built-in screw 30 on the A guide 11, and the tip of the shaft portion of the screw is moved by relative movement between the guide surface 13a and the washer built-in screw 30 being conveyed. The threaded portion of the washer built-in screw 30 is pushed up by the guide surface 13a and lifted by a predetermined amount.

  At this time, the first and second washers 33, 34 remain at the support points by the first and second rails 3, 4, and for this reason, between the head 31 of the washer built-in screw 30 and the second washer 34. A gap g is formed. The first and second support plates 7 and 8 enter the gap g due to relative movement with the screw, and the washer built-in screw 30 moves onto the B guide 12.

  Also in the second embodiment of the conveyance / correction device 10, the B guide 12 is inserted between the screw head 31 and the second washer 34 to support the screw head 31. Therefore, the hanging posture of the screw becomes vertical, and there are no problems caused by the inclination of the screw (decrease in inspection accuracy of the inspection apparatus or decrease in conveyance stability of the conveyance apparatus). Note that the transport / correction device 10 according to the second form can be simplified in structure as compared with the first form. However, since the tip of the moving screw is guided by the guide surface 13a of the inclined surface to lift the screw, The stability and the stability of the transition between the A and B guides may depend on the height of the guide surface.

  FIG. 8 shows an embodiment of a quality inspection device 20 for a washer built-in screw employing the conveyance / correction device 10 of the present invention.

  8 in FIG. 8 is a commercially available parts feeder (ball feeder in the figure), and 15 is a commercially available parts feeder (in the figure is a linear feeder), and the conveying / correcting device 10 of the present invention is installed between them to supply screws. A device 16 is configured.

  The parts feeder 14 supplies the washer built-in screws 30 housed in the balls while being aligned. The parts feeder 15 also introduces screw shafts between the left and right rails arranged in parallel, suspends the screws between the left and right rails, and generates vibrations by applying vibrations to the rails.

  The screw support by the parts feeder 14 supports the washer from below. In this state, the washer built-in screw 30 is moved to the above-described A guide, and a gap is formed between the head of the washer built-in screw 30 and the washer under the neck in the middle of conveyance by the A guide, and the B guide is formed in the gap. The first and second support plates enter, and the head of the screw is supported by the B guide.

  The washer built-in screw 30 is sent to the inspection unit transport device 21 of the quality inspection device while maintaining the state. The illustrated inspection section transport apparatus 21 includes a horizontally disposed transport table 22a that rotates about a vertical axis, and an outer peripheral portion 22b of the transport table 22a is interposed between a screw head and a neck washer. It is made of a thick plate that can be inserted.

  A notch groove 22c for receiving the lower part of the neck of the washer built-in screw 30 is provided at a constant pitch on the periphery of the outer peripheral part 22b to constitute the conveying part 22 of the inspection part conveying apparatus 21, and is suspended by the conveying / correcting apparatus 10 The washer-incorporated screw 30 having been corrected is transferred to the conveyance unit 22 of the inspection unit conveyance device 21 via the parts feeder 15, and the conveyance of the washer-incorporated screw 30 by the inspection unit conveyance device 21 supports the screw head 31. Made. FIG. 1 and FIG. 6 also show the support state of the screw by the transport unit 22.

  The washer built-in screw 30 can be supplied from the B guide of the conveyance / correction device 10 to the conveyance unit 22 without the illustrated parts feeder 15.

  In addition, 23-27 of FIG. 8 is the 1st-5th test | inspection part provided in the middle of the conveyance path. Among these, the 1st test | inspection part 23 performs the test | inspection of the neck length of a screw, and the test | inspection of head height. The second inspection unit 24 uses a CCD camera to inspect the tip shape of the screw, the thread pitch, the screw outer diameter, the washer mounting leakage, and the like. The third inspection unit 25 uses the CCD camera to check the screw thread. Inspect the outer diameter of the head, the presence or absence of scratches on the head, and the quality of the operation holes. Furthermore, the fourth inspection unit 26 inspects whether there is a screw conveyance leak, and the fifth inspection unit 27 inspects the presence of surface plating. The screw with a built-in washer determined to be defective by these inspection units is taken out from the defective product discharge unit 28, and the non-defective product is sent to the non-defective product discharge unit 29. The configuration of the inspection unit is not characteristic and can be arbitrarily changed.

  The inspection unit transport device 21 has a configuration that is considered to be the best in terms of downsizing of the device, but is not limited to this configuration. For example, a linear feeder or two endless wires may be arranged in parallel and driven by a roller, and a screw may be suspended by the two wires.

The side view which shows the conveyance / correction apparatus of a 1st form Sectional view along the line II-II in FIG. Sectional view along line III-III in FIG. Sectional view along line IV-IV in FIG. Sectional view along line VV in FIG. Partially broken side view showing the second embodiment of the conveyance / correction device Plan view of the entrance of the B guide The top view which shows an example of the inspection apparatus of the washer built-in screw of this invention

Explanation of symbols

1, 11 A guide 2, 12 B guide 3 First rail 3a Conveying surface 4 Second rail 5 Head support 6 Shaft passage 7 First support plate 8 Second support plate 9 Shaft passage 10 Conveying / correcting device 13 Push-up tool 13a Guide surfaces 14, 15 Parts feeder 16 Screw supply device 20 Pass / fail inspection device 21 Inspection unit transport device 22 Transport unit 22a Transport table 22b Outer peripheral portion 22c Notch groove 23-27 First to fifth inspection unit 28 Defective product discharge unit 29 Non-defective product unloading section 30 Washer built-in screw 31 Head 32 Shaft section 33 First washer 34 Second washer L Distance in the rail height direction from the first rail to the first support plate Step difference

Claims (6)

A conveying / correcting device that suspends and conveys a washer built-in screw (30) and corrects the hanging posture of the screw during the conveyance,
A guide (1) having a first rail (3) inclined in a direction to fall sideways and a screw head receiver (5) provided along the first rail (3), and a rail whose start end is an A guide The first and second support plates (7, 8), which are inclined in the same direction as the inclination and gradually become smaller and the end side is horizontal, are arranged opposite to each other with the shaft passage (9) interposed therebetween. (2)
The A guide (1) is a first washer (33) under the neck of the screw on the side surface of the shaft (32) of the washer built-in screw (30) on the side facing the back of the first rail (3). Is supported by the conveying surface (3a) of the first rail (3) and the outer periphery of the screw head (31) from below by the head support (5),
A gap (g) is formed between the head (31) and a washer (34) under the neck of the screw under the condition that the washer built-in screw (30) is supported by the A guide (1).
The first support plate (7) enters the gap (g) in advance, the second support plate (8) enters the gap at the opposite position with a delay, and the B guide (2) moves to the screw head (31). ) Conveyor / straightening device for screw with built-in washer configured to support   The A guide (1) is provided with first and second rails (3, 4) arranged in parallel on the start end side, and a washer is attached to a shaft passage (6) between the first and second rails (3, 4). The shaft portion (32) of the built-in screw (30) is introduced to support the first washer (33) on the conveying surface of the first and second rails (3, 4), and at least the terminal end is in a direction that falls sideways. The inclined side of the first rail (3) is configured to support the screw shaft (32) on the side face, and the second rail (4) is installed halfway along the conveyance path. 2. The washer built-in screw conveying / correcting device according to claim 1, wherein the head rest (5) is installed in place of the second rail (4) on the terminal end side of the road.   Between the first end of the first support plate (7) constituting the B guide (2) and the start end of the second support plate (8), from the first rail (3) to the first support plate (7). The distance (L) in the rail height direction is increased in front of the screw conveyance direction, and the washer built-in screw conveyance / correction device according to claim 1 or 2. A conveying / correcting device that suspends and conveys a washer built-in screw (30) and corrects the hanging posture of the screw during the conveyance,
The A guide (11) composed of the first and second rails (3, 4) arranged in parallel and the washer built-in screw (30) supported by the A guide (11) are lifted from the A guide (11). A push-up tool (13), and a horizontally arranged first and second support plates (7, 8) having a B guide (12) arranged opposite to each other with a shaft passage (9) interposed therebetween,
The A guide (11) introduces the shaft portion (32) of the washer-incorporating screw (30) into the shaft passage (6) between the rails, and the first washer (33) under the neck of the screw is inserted into the first guide (11). The second rail (3, 4) is configured to be supported from below,
The push-up tool (13) moves the washer-incorporating screw (30) supported and conveyed by the A guide (11) on the inclined guide surface (13a) where the tip of the shaft (32) of the screw contacts. It is configured to be guided and lifted by a predetermined amount, and by this lifting, a gap (g) is formed between the head (31) of the washer built-in screw (30) and the washer (34) under the neck of the screw. The B guide (12) is arranged with a predetermined step (h) with respect to the A guide (11) so that the first and second support plates (7, 8) enter the gap (g). Conveyor / straightening device for screw with built-in washer configured such that guide (12) supports screw head (31). A washer built-in screw (30) is hung and conveyed by an inspection unit conveying device (21), and passes through an inspection station in the middle of conveyance to perform a pass / fail inspection. The inspection unit conveying device The transport part (22) of (21) can be inserted into the gap between the head (31) of the washer built-in screw and the washer (34) under the neck, and this inspection part transport device (21) A screw supply device (16) for supplying a washer built-in screw (30)
The screw feeder (16) includes the washer built-in screw conveyance / correction device (10) according to any one of claims 1 to 4,
The washer built-in screw (30) whose hanging posture is corrected by the conveying / correcting device (10) is between the B guide or the B guide and the inspection unit conveying device (21) with respect to the conveying unit (22). Inspection of a washer-incorporated screw transferred from the feeder (15) interposed in the machine and supported by the screw head (31) by the inspection unit conveying device (21) of the washer-incorporated screw (30). apparatus.   The inspection unit transport device (21) includes a horizontally disposed transport table (22a) that rotates about a vertical axis, and the outer peripheral portion (22b) of the transport table (22a) is connected to the head and neck of the screw. It is formed of a plate material having a thickness that can enter between the lower washer, and a notch groove (22c) that receives the lower part of the neck of the washer built-in screw (30) is provided at a constant pitch on the periphery of the outer peripheral portion (22b). The washer-incorporating screw inspection device according to claim 5, comprising the portion (22).

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