JP2005337887A - Inspection device of shaft with head part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inspection device capable of inspecting a through hole provided on a work shaft part orthogonally to the axis, a slit provided on the end face of the work shaft part in parallel with the axis or the like, and inspecting the work over the whole periphery around its axis. <P>SOLUTION: This inspection device of the shaft with a head part has a rotary table T for introducing a neck part of the shaft W with the head part sent from a feeder into a notched groove 1 provided at a constant pitch on the outer periphery, and supporting the head part of the shaft W from the lower side; and an inspection part K2 for grasping the head part of the shaft W by a chuck 3 provided over the rotary table T, rotating the chuck 3 around the axis L by a rotating mechanism 4, and detecting the shaft W by an optical sensor 5 or a camera provided sideward, to thereby inspect the quality thereof. The device also has such a function that the rotary table T can stop the shaft W on the position of the chuck 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an inspection apparatus for a shaft body with a head, which performs a quality inspection of the shaft body with a head such as a screw with a head, a nail, a bolt, a rivet, and a connecting pin.

  When inspecting the quality of shafts with heads (hereinafter referred to as "workpieces") such as screws, nails, bolts, rivets, and connecting pins with heads, the rotary table is continuously rotated and the outer periphery of the rotary table 2. Description of the Related Art An inspection apparatus is used that introduces a neck of a work into a notch groove provided in the work and inspects a work that moves as the rotary table rotates with an optical sensor or a camera (Patent Document 1).

  However, this apparatus could not inspect through holes provided at right angles to the axis of the work shaft, slits provided parallel to the axis on the end surface of the work shaft. That is, when the workpiece passes through the field of view of the optical sensor or the like, the through hole or the like of the workpiece may come to a position where it cannot be seen from the optical sensor or the like.

  Further, this inspection apparatus does not have a function of rotating the workpiece around the axis of the workpiece, and therefore, when the workpiece passes through the field of view of the optical sensor or the like, a defect on the back side of the workpiece as viewed from the optical sensor or the like is found. I couldn't.

Japanese Patent Publication No. 60-35003

  The problem to be solved by the present invention is that it is possible to inspect through holes provided at right angles to the axis of the workpiece shaft, slits provided parallel to the axis on the end surface of the workpiece shaft, etc. An object of the present invention is to provide an inspection apparatus that can inspect over the circumference.

  In order to solve the above problems, in the present invention, a neck portion of a shaft body with a head fed from a feeder is introduced into a notch groove provided at a constant pitch on the outer periphery, and the head portion of the shaft body is supported from below. The rotating table and the chuck provided above the rotating table are used to grip the head of the shaft body, and the chuck is rotated around the axis of the shaft body by a rotating mechanism, and provided on the side of the shaft body. An inspection unit that detects the quality of the shaft body by detecting the shaft body with an optical sensor or a camera, and provides the rotary table with a function of stopping the supported shaft body at the position of the chuck. An inspection apparatus for a shaft body with a head is provided.

Such an inspection apparatus becomes more preferable when the following configuration is added.
1) The chuck is a chuck that grips the head of the shaft body from the radial direction of the rotary table.
2) An elevating mechanism for elevating the chuck is provided.
3) A plurality of inspection units for inspecting the shaft body are provided on a moving path of the shaft body supported by the rotary table, and at least one of the inspection units is set as the inspection unit.

  The workpiece is rotated around its axis by the rotation mechanism that rotates the chuck, and the workpiece is detected from the side by an optical sensor or camera. When the workpiece enters the field of view of the optical sensor, etc., it is provided on the workpiece shaft. Even if a through hole or a slit is not visible from an optical sensor or the like, the quality can be inspected. It is also possible to find defects on the back side of the work as viewed from an optical sensor or the like.

  1 and 2 show an embodiment of the inspection apparatus of the present invention. The inspection apparatus includes a feeder F that feeds the workpiece W, a rotary table T that moves the fed workpiece W, inspection units K1, K2, and K3 that inspect the workpiece W, and a discharge unit H that delivers the inspected workpiece W. It consists of.

  The workpiece W is fed from the feeder F to the outer periphery of the rotary table T provided at the outlet of the feeder F, and the neck portion of the workpiece W is introduced into the notch groove 1 provided at a constant pitch on the outer periphery of the rotary table T. . In this way, the heads connected to the upper side of the neck are supported from the lower side by the rotary table T, and the workpiece W moves as the rotary table T rotates. At this time, the arc-shaped guide 2 provided along the outer periphery of the rotary table T prevents the workpiece W from coming out of the notch groove 1, so that the workpiece W does not fall during movement.

  In the moving path of the workpiece W by the rotary table T, inspection units K1, K2, and K3 are provided. The inspection unit K2 is, for example, an inspection unit that inspects the horizontal hole W1 of the workpiece W illustrated in FIG. The inspection unit K2 includes a chuck 3, a rotation mechanism 4, an optical sensor 5, and an elevating mechanism 6. The other inspection parts K1 and K3 are, for example, inspection parts for long / short inspection of the workpiece W and inspection parts for plating inspection.

  The rotary table T is driven intermittently by being driven by a rotary drive mechanism (not shown), and the work W in the notch groove 1 is stopped at a position directly below the chuck 3 provided above the rotary table T. The claw 3a opposite to the chuck 3 grips the head of the stopped workpiece W from the radial direction of the rotary table T as shown in FIGS. Since the gripping is performed from the radial direction of the turntable T, the workpiece W that moves in the circumferential direction of the turntable T is in the chuck 3 even when the chuck 3 provided above the turntable T is lowered by the lifting mechanism 6. It can move to just below the chuck 3 without interfering with the claw 3a.

  When the chuck 3 grips the head of the workpiece W, the rotation mechanism 4 provided on the upper side rotates the chuck 3 about the axis L of the workpiece W.

  At this time, the optical sensor 5 provided on the side of the workpiece W applies light to the position of the horizontal hole W1 of the workpiece W rotating about the axis L, and captures the light reflected from the workpiece W. Since the reflected light from the workpiece W changes when the horizontal hole W1 is in the direction of the optical sensor 5, it is possible to inspect whether or not the horizontal hole W1 is normally provided by detecting this reflected light.

  Thereafter, the chuck 3 releases the head of the workpiece W, and the rotary table T rotates. In this way, the workpiece W is sent to the downstream inspection unit K3, and at the same time, the next workpiece W is moved to just below the chuck 3.

  The workpiece W determined to be defective by the inspection units K1, K2, and K3 is paid out from the notch groove 1 of the rotary table T to the defective product discharge port 7 of the discharge unit H, and the workpiece W determined to be non-defective is It is paid out to the good product discharge port 8 of the discharge part H. The payout is performed by, for example, a mechanism (not shown) that blows air onto the workpiece W moving by the rotary table T.

  Similarly, it is possible to inspect a slit W2 provided at the tip of the workpiece W as shown in FIG. When the lower part of the workpiece W is long and its tip is out of the field of view of the optical sensor 5, the chuck 3 is lifted by the lifting mechanism 6 as shown in FIG. Thus, the slit W2 can be inspected by putting the slit W2 at the tip of the workpiece W into the field of view. When the chuck 3 is raised by the elevating mechanism 6 and rotated by the rotating mechanism 4, if the tip of the rod of the auxiliary cylinder 7 provided below the work W is pressed against the shaft end of the work W, the work W The rise and rotation of can be stabilized.

  The rotation mechanism 4 may be any mechanism that can rotate the chuck 3 about the axis of the workpiece W, such as an electric motor or an air-driven rotary actuator.

  The rotation angle of the rotation mechanism 4 is preferably an integral multiple of 180 degrees. In this way, after the chuck 3 is rotated, the claw 3a of the chuck 3 comes to the original position or the half-rotated position from the original position. The head and the claw 3a of the chuck 3 do not interfere with each other.

  The chuck 3 is a parallel type chuck in which the claw 3a moves in parallel in the figure, but may be a lever type chuck that opens and closes the tip end side of the claw. When the head of the workpiece W is a ferromagnetic material such as iron, A magnetic chuck such as a chuck may be used. With such a chuck, even if the position of the workpiece W is displaced in the radial direction of the rotary table T, the head of the workpiece W and the chuck 3 do not interfere when the workpiece W moves under the chuck 3. Further, by detecting the head of the workpiece W before rotating about the axis L and the head of the workpiece W after rotating with an optical sensor or a camera, the head of the workpiece W is also completely rotated around the axis L. Can be inspected over the circumference.

  In the figure, the elevating mechanism 6 includes a moving frame 6a to which the chuck 3 and the rotating mechanism 4 are attached, an air cylinder 6b for elevating the moving frame 6a, a guide 6c for guiding the elevating of the moving frame, an air cylinder 6b, It consists of a fixed frame 6d for fixing the guide 6c, and the chuck 3 and the rotating mechanism 4 are both raised and lowered. In this way, the rotation mechanism 4 only needs to rotate the chuck 3, and it is not necessary to rotate the elevating mechanism 6, so there is no need to enlarge the rotation mechanism 4.

  A camera such as a CCD camera may be used instead of the optical sensor 5. By capturing the image of the workpiece W before rotating around the axis L and the image of the workpiece W after rotating with the camera, it exists not only on the front side of the workpiece W but also on the back side as viewed from the camera. It is also possible to find defects that do.

  Note that the rotary table T may be continuously rotated without using the function of stopping the workpiece W at the position of the chuck 3. If the workpiece W is continuously rotated, the workpiece W cannot be gripped by the chuck 3, so that the inspection unit K2 cannot inspect the horizontal hole W1 and the slit W2, but can perform the conventional inspection. In this case, if the chuck 3 is raised by the elevating mechanism 6, there is no possibility that the workpiece W and the chuck 3 interfere with each other.

The front view which shows embodiment of the test | inspection apparatus of this invention Sectional drawing along the AA line of FIG. (A) is a figure which shows the example of the through-hole provided in the workpiece | work shaft part at right angles to the axis line, (b) is a figure which shows the example of the slit provided in the end surface of the workpiece | work shaft part in parallel with the axis line. (A) is a diagram showing the chuck before gripping the workpiece, (b) is a diagram showing the chuck after gripping The figure which shows the chuck raised by the raising / lowering mechanism

Explanation of symbols

F Feeder T Rotary table K1, K2, K3 Inspection part H Discharge part 1 Notch groove 2 Guide 3 Chuck 4 Rotating mechanism 5 Optical sensor 6 Elevating mechanism

Claims (4)

  A rotary table that introduces a neck portion of a shaft body with a head to be fed from a feeder into a notch groove provided at a constant pitch on the outer periphery and supports the head portion of the shaft body from below, and a chuck provided above the rotary table To grip the head of the shaft body, rotate the chuck around the axis of the shaft body by a rotation mechanism, detect the shaft body by an optical sensor or camera provided on the side of the shaft body, and An inspection unit that inspects the quality of the shaft body, and the rotary table has a function of stopping the supported shaft body at the position of the chuck.   The inspection apparatus for a shaft body with a head according to claim 1, wherein the chuck is a chuck that grips a head of the shaft body from a radial direction of the rotary table.   The inspection apparatus for a shaft body with a head according to claim 1, further comprising an elevating mechanism for elevating the chuck.   4. The inspection unit according to claim 1, wherein a plurality of inspection units that inspect the shaft body are provided in a movement path of the shaft body supported by the rotary table, and at least one of the inspection units is the inspection unit. The inspection apparatus of the shaft body with a head described in 1.

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