JP2006341331A - Workpiece transferring method and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece transferring device transferring a workpiece from a supplying side to a receiving side without forming a lot of locating holes on the workpiece. <P>SOLUTION: In the workpiece transferring device, a workpiece W having locating holes 8 is received from a workpiece supply mechanism 4 having at least two or more supplying side locating pins 2 on a supplying side workpiece base 3 with a workpiece receiving mechanism 7 having at least two or more receiving side locating pins 5 on a receiving side workpiece base 6. After the supplying side locating pins 2 of the workpiece supply mechanism 4 are inserted into the locating holes 8 formed on the workpiece W, the workpiece W is transferred from the workpiece supply mechanism 4 to the workpiece receiving mechanism 7 by inserting the receiving side locating pins 5 of the workpiece receiving mechanism 7 from the opposite side across the workpiece W into the same locating pins 8 where the supplying side locating pins 5 are inserted and contacting to the supplying side locating pins 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a workpiece transfer method and a workpiece transfer apparatus for transferring a workpiece from a workpiece supply side to a workpiece reception side, and a completely new workpiece transfer method for transferring workpieces using a common locate hole on the supply side and the reception side. And a workpiece transfer device.

For example, in an automobile production line, a workpiece (work panel) is sent to a welding stage or the like, and the workpiece is transferred using a workpiece transfer device. To deliver a workpiece, the workpiece supply side locating pin is inserted into a locating hole (positioning hole) formed in the workpiece, the workpiece is gripped, and the workpiece is handled in this state to be formed at another position. The workpiece is received by inserting a locating pin on the workpiece receiving side into the locating hole (see, for example, Patent Document 1).
JP 2000-167771 A (pages 5 and 6; FIGS. 1 and 3)

  In this way, the workpiece supply and the workpiece receiving locating holes are formed at different positions in order to deliver the workpiece. Therefore, it is necessary to form a large number of locate holes in the work, and in particular, in the case of a small work, there are cases where a large number of locate holes cannot be formed.

  Therefore, an object of the present invention is to provide a workpiece transfer method and a workpiece transfer device that can transfer a workpiece from a supply side to a reception side without forming a large number of locate holes in the workpiece.

  The present invention relates to a workpiece receiving mechanism in which a locating hole is formed from a workpiece supply mechanism having at least two or more supply side locating pins in a supply side workpiece table, and also having at least two or more receiving side locating pins in a receiving side workpiece table. A workpiece delivery method for receiving by a mechanism, wherein after inserting a supply side locating pin of the workpiece supply mechanism into a locating hole formed in the workpiece, the supply side locating pin is brought into contact with a receiving side locating pin of the workpiece receiving mechanism. The receiving side locating pin of the workpiece receiving mechanism is inserted into the same locating hole into which the supplying side locating pin is inserted from the opposite side across the workpiece, and the workpiece is transferred from the workpiece supplying mechanism to the workpiece receiving mechanism. It is characterized by delivery.

  According to the workpiece transfer method of the present invention, since the supply side locating pin and the receiving side locating pin are inserted into the same locating hole and the workpiece is transferred, there is no need to form the locating holes on the supplying side and the receiving side on the workpiece, Further, even a small work can be reliably transferred from the supply side to the receiving side.

  Further, according to the workpiece transfer method of the present invention, it is not necessary to form a large number of locate holes in the workpiece, so that even a small workpiece can be reliably transferred.

  Hereinafter, specific embodiments of a workpiece transfer method and a workpiece transfer apparatus to which the present invention is applied will be described in detail with reference to the drawings.

“First Embodiment”
FIG. 1 is an overall view of a workpiece transfer apparatus according to the first embodiment, FIG. 2 is a perspective view showing an example of a supply side locating pin and a receiving side locating pin, and FIG. The cross section in the A line position is shown, (A) is a cross sectional view of the receiving side locate pin, (B) is a cross sectional view of the supply side locate pin, and (C) is a cross sectional view when both the locate pins are fitted.

  As shown in FIG. 1, the workpiece transfer device 1 includes a workpiece supply mechanism 4 having at least two supply side locating pins 2 on a supply side workpiece table 3, and at least two reception side locating pins 5. 6 and a workpiece receiving mechanism 7 that receives the workpiece W from the workpiece supply mechanism 4.

  Both the workpiece supply mechanism 4 and the workpiece receiving mechanism 7 are attached to a robot hand and arranged on a predetermined stage such as an automobile production line. The supply-side locating pin 2 and the receiving-side locating pin 5 are attached to the supply-side worktable 3 or the receiving-side worktable 6 at positions where they are inserted into two locating holes 8 formed as circular holes in the work W at a predetermined pitch. Yes.

  On the leading end side of the supply side locating pin 2 and the receiving side locating pin 5, a concave portion and a convex portion that are fitted to each other are formed. Specifically, as shown in FIG. 2 and FIG. 3A, a concave portion is formed in the distal end side of the receiving side locate pin 5 by forming a linear slit in the center of the pin having a circular cross section in the radial direction. A straight groove portion 9 is formed. On the other hand, on the distal end side of the supply side locating pin 2, a straight ridge portion 10 that is a convex portion that fits into the straight groove portion 9 is formed in the radial direction in the center portion of the pin having a circular cross section. .

  Further, a tapered surface 11 is formed on the distal end side of the supply side locating pin 2 so that the diameter gradually decreases toward the distal end so as to facilitate insertion into the locating hole 8. Similarly, a tapered surface 12 for facilitating insertion into the straight groove portion 9 is formed on the distal end side of the straight protrusion portion 10.

  Next, a workpiece transfer method for transferring the workpiece W from the workpiece supply mechanism 4 to the workpiece receiving mechanism 7 using the workpiece transfer apparatus 1 configured as described above will be described.

  First, the workpiece W is held on the supply side locate pin 2 of the workpiece supply mechanism 4. That is, the supply side locate pin 2 of the work supply mechanism 4 is inserted into the locate hole 8 formed in the work W. Accordingly, the workpiece W is positioned by the supply side locating pin 2 and is mounted and held on the workpiece supply mechanism 4. When the workpiece W is mounted and held on the workpiece supply mechanism 4, the workpiece W is clamped by a clamping device (not shown) so that the workpiece W does not fall.

  Next, the workpiece W held by the workpiece supply mechanism 4 is transferred to the receiving side locate pin 5 of the workpiece receiving mechanism 7. That is, the workpiece supply mechanism 4 is moved closer to the workpiece receiving mechanism 7 waiting at a predetermined position, and the workpiece receiving mechanism 7 is inserted into the same locating hole 8 from the side opposite to the supply side locating pin 2 inserted into the locating hole 8. The receiving side locate pin 5 is inserted. At this time, the tip of the supply side locating pin 2 is brought into contact with the receiving side locating pin 5. Then, as shown in FIG. 3 (C), the straight protrusion 10 formed on the supply side locating pin 2 is fitted into the straight groove 9 formed on the receiving side locating pin 5, and the supply side locating pin 2 and the above described The axis of the receiving side locate pin 5 coincides.

  In this state, the clamp of the clamping device described above is released, and the workpiece W is received by moving the workpiece W from the workpiece supply mechanism 4 to the workpiece receiving mechanism 7 by a workpiece pressing member (not shown) or by its own weight. Delivered to mechanism 7.

  4 is a perspective view showing another example of the supply side locating pin and the receiving side locating pin, FIG. 5 is a sectional view of the supplying side locating pin and the receiving side locating pin in FIG. 4 at the position AA, and (A) is the receiving side locating pin. (B) is sectional drawing of a supply side locate pin, (C) is sectional drawing when both the locate pins fit.

  As shown in FIG. 4 and FIG. 5 (A), at the tip of the receiving side locate pin 5, three linear slits are formed radially from the center of the pin having a circular cross section to form a recess and Radiation groove portions 13 (13a, 13b, 13c) to be formed are formed. On the other hand, radial protrusions 14 (14a, 14b, 14c), which are convex portions fitted into the radiation groove portion 13, are radially provided from the center portion of the pin having a circular cross section on the distal end side of the supply side locating pin 2. Three are formed in the radial direction.

  In this example, as shown in FIG. 5C, the receiving side locating pin 5 inserted from the opposite direction with the workpiece W interposed in the radiation groove 13 formed in the supply side locating pin 2 inserted into the same locating hole 8. When the radial ridges 14 formed in are fitted together, the supply side locating pin 2 and the receiving side locating pin 5 are aligned with each other, and the workpiece W is delivered from the workpiece feeding mechanism 4 to the workpiece receiving mechanism 7. It is.

  6 is a perspective view showing still another example of the supply side locating pin and the receiving side locating pin, and FIG. 7 is a cross-sectional view when the supplying side locating pin and the receiving side locating pin of FIG. 6 are fitted.

  As shown in FIGS. 6 and 7, a semicircular cutout groove 15 is formed at the tip of the receiving locating pin 5 by cutting out a semicircular portion of the pin having a circular cross section. On the other hand, a semicircular ridge portion 16 is formed at the tip of the supply side locating pin 2 so as to fit in the semicircular cutout groove portion 15 and constitute a circle having the same diameter as the locating hole 8.

  In this example, as shown in FIG. 7, a semicircular protrusion 16 formed on the receiving locating pin 5 is formed in a semicircular notch groove 15 formed on the supply locating pin 2 inserted into the same locating hole 8. By fitting, the supply locating pin 2 and the receiving locating pin 5 are aligned with each other, and the workpiece W is transferred from the workpiece supplying mechanism 4 to the workpiece receiving mechanism 7.

  Thus, according to the workpiece transfer method and the workpiece transfer apparatus of the present embodiment, the supply side locating pin 2 and the receiving side locating pin 5 are inserted into the same locating hole 8 to transfer the workpiece W. It is no longer necessary to form the respective locating holes 8 in the work W, and even the small work W can be reliably transferred from the supply side to the receiving side.

  Further, according to the present embodiment, the convex portion (straight ridge portion) formed on the receiving side locating pin 5 in the concave portion (straight groove portion 9, radiation groove portion 13, semicircular notch groove portion 15) formed on the supply side locating pin 2. 10, the radial ridges 14 and the semicircular ridges 16) are fitted, so that the shaft centers of the supply side locating pin 2 and the receiving side locating pin 5 coincide with each other, and the workpiece W is received from the workpiece supply mechanism 4. It can be reliably transferred to the mechanism 7.

“Second Embodiment”
FIG. 8 shows a second embodiment and is an enlarged view of a main part showing a series of steps for transferring a workpiece from the workpiece supply mechanism to the workpiece receiving mechanism.

  In the second embodiment, the receiving side locating pin 5 is formed with an annular work placing surface 17 on which the work W is placed, and the supply side locating pin 2 is projected and retracted with respect to the aforementioned supply side work table 3. It can be freely moved up and down by a compression coil spring 18 arranged on the base end side of the pin so that it can be freely moved, and a cylindrical work support member 19 for supporting the work W is provided around the outer side of the supply side locating pin 2. It is fixed to.

  Note that, in the second embodiment, similarly to the first embodiment, the supply side locating pin 2 and the receiving side locating pin 5 may have a convex portion and a concave portion that are fitted to each other, as in the first embodiment. Or these convex parts and concave parts may not be formed. In FIG. 8, it is assumed that convex portions and concave portions are not formed at the tip portions of the supply side locating pin 2 and the receiving side locating pin 5.

  In this embodiment, after the locating hole 8 is inserted into the supply side locating pin 2 and the work W is held by the work supply mechanism 4, the work receiving mechanism 7 is moved closer to the work supply mechanism 4. Then, as shown in FIG. 8 (A), the leading end of the receiving locating pin 5 is brought into contact with the leading end of the supplying locating pin 2, and the receiving locating pin 5 shows the supplying locating pin 2 in FIG. 8 (B). So push in.

  Then, the supply side locating pin 2 moves backward against the urging force of the compression coil spring 18, and accordingly, the receiving side locating pin 5 enters the locating hole 8 as shown in FIG. . Finally, the workpiece W comes into contact with the workpiece placement surface 17 formed on the receiving side locating pin 5, and the workpiece W is guided and held by the receiving side locating pin 5 and delivered to the workpiece receiving mechanism 7.

  As described above, according to the second embodiment, the supply side locating pin 2 can be moved into and out of the supply side work table 3 so that the supply inserted into the same locating hole 8 when the work W is delivered. By pressing the receiving side locating pin 5 against the tip of the side locating pin 2 and pushing it in, the axes of the locating pins 2 and 5 are aligned with each other, and the receiving side locating pin 5 can be smoothly inserted into the locating hole 8.

  In the second embodiment, since the workpiece support member 19 that supports the workpiece W is provided around the outer periphery of the supply side locating pin 2, the workpiece W is smoothly caught without being caught when the workpiece W is transferred to the receiving side locating pin 5. Can be transferred from the workpiece supply mechanism 4 to the workpiece receiving mechanism 7.

  In the second embodiment, the receiving side locate pin 5 is fixed, the supply side locate pin 2 can be moved in and out, and the work support member 19 is provided on the outer periphery thereof. Conversely, the supply side locate pin 5 is provided. 2 may be fixed, and the receiving side locating pin 5 may be moved in and out, and a work support member 19 may be provided on the outer periphery thereof.

“Third Embodiment”
FIG. 9 shows a third embodiment and is an enlarged view of a main part showing a series of steps for transferring a workpiece from the workpiece supply mechanism to the workpiece receiving mechanism.

  In the third embodiment, in addition to the configuration of the second embodiment, clamp arms 20 and 21 for clamping the work W are provided inside the pins of the supply side locating pin 2 and the receiving side locating pin 5. The workpiece W is clamped by the clamp claws 20a, 21a formed at the tip of the. Further, when the workpiece W is delivered to the workpiece receiving mechanism 7, the clamp arm 21 provided in the receiving side locating pin 5 does not contact the workpiece supporting member 19 (so as not to interfere with the workpiece supporting member 19). The work support member 19 is provided with an escape portion 19a.

  In this embodiment, the locating hole 8 is inserted into the supply side locating pin 2, the clamp claw 20 a of the clamp arm 20 is pushed out of the supply side locating pin 2, and the workpiece W is supplied with the clamp claw 20 a. After being held by the mechanism 4, the workpiece receiving mechanism 7 is moved closer to the workpiece supply mechanism 4 side. Then, as shown in FIG. 9A, when the distal end portion of the receiving side locate pin 5 comes into contact with the distal end portion of the supply side locate pin 2, as shown in FIG. 9B, the clamp arm 20 in the supply side locate pin 2 is placed. The clamp pawl 20a is retracted in the supply side locate pin 2.

  When the receiving side locate pin 5 is pushed in from this state, the supply side locate pin 2 moves backward against the urging force of the compression coil spring 18, and the receiving side locate pin 5 is shown in FIG. 9C accordingly. As shown in FIG. When the workpiece W finally comes into contact with the workpiece placement surface 17 formed on the receiving side locating pin 5, the clamp claw 21 a of the clamp arm 21 provided in the receiving side locating pin 5 is moved to the receiving side locating pin 5. The workpiece W is pushed outward and the workpiece W is pressed against the workpiece placement surface 17 by the clamp claw 21a. As a result, the workpiece W is guided and held by the receiving side locating pin 5 and delivered to the workpiece receiving mechanism 7.

  Although specific embodiments to which the present invention is applied have been described above, the present invention is not limited to the above-described embodiments.

  For example, in the first embodiment, the concave portion (straight groove portion 9, the radiating groove portion 13, the semicircular notch groove portion 15) formed in the supply side locating pin 2 and the convex portion (straight ridge portion) formed in the receiving side locating pin 5 are used. 10, the radial protrusions 14 and the semicircular protrusions 16), the ones that require accuracy and strength are made to have a larger concave or convex area. If it does in this way, delivery of the workpiece | work W which ensured required precision and intensity | strength can be performed.

1 is an overall view of a workpiece transfer apparatus according to a first embodiment. It is a perspective view which shows 1st Embodiment and shows an example of a supply side locate pin and a receiving side locate pin. 2A and 2B are cross-sectional views of the supply side locating pin and the receiving side locating pin taken along the line AA in FIG. 2, (A) is a cross sectional view of the receiving side locating pin, (B) is a cross sectional view of the supplying side locating pin, It is sectional drawing when these are fitted. It is a perspective view which shows 1st Embodiment and shows the other example of the supply side locate pin and the receiving side locate pin. 4A and 4B are cross-sectional views taken along line AA of the supply side locating pin and the receiving side locating pin of FIG. 4, (A) is a cross sectional view of the receiving side locating pin, (B) is a cross sectional view of the supplying side locating pin, It is sectional drawing when these are fitted. It is a perspective view which shows 1st Embodiment and shows the further another example of the supply side locate pin and the receiving side locate pin. It is sectional drawing when the supply side locate pin and receiving side locate pin of FIG. 6 fit. It is a principal part enlarged view which shows 2nd Embodiment and shows a series of processes which deliver a workpiece | work from a workpiece | work supply mechanism to a workpiece | work receiving mechanism. It is a principal part enlarged view which shows 3rd Embodiment and shows a series of processes which deliver a workpiece | work from a workpiece supply mechanism to a workpiece | work receiving mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Work delivery apparatus 2 ... Supply side locating pin 3 ... Supply side work base 4 ... Work supply mechanism 5 ... Receiving side locating pin 6 ... Receiving side work base 7 ... Work receiving mechanism 8 ... Locate hole 9 ... Straight groove (concave part)
10 ... Straight ridge (convex)
11, 12 ... Tapered surface 13 ... Radiation groove (recess)
14 ... Radial ridge (convex)
15 ... Semicircle notch groove (recess)
16 ... Semicircle ridge (convex)
17 ... Work placement surface 18 ... Compression coil spring 19 ... Work support member 20, 21 ... Clamp arm 20a, 21a ... Clamp claw

Claims (7)

A workpiece receiving a workpiece having a locating hole from a workpiece supply mechanism having at least two or more supply side locating pins on the supply side workpiece table by a workpiece receiving mechanism having at least two or more receiving side locating pins on the receiving side workpiece table. A delivery method,
After the supply side locating pin of the workpiece supply mechanism is inserted into the locating hole formed in the workpiece, the supply side locating pin is brought into contact with the receiving side locating pin of the workpiece receiving mechanism, and the supply side locating pin is inserted. A workpiece delivery method comprising: inserting a receiving side locating pin of the workpiece receiving mechanism from the opposite side across the workpiece into the locating hole, and transferring the workpiece from the workpiece supply mechanism to the workpiece receiving mechanism. . The work delivery method according to claim 1,
A workpiece transfer method, wherein a concave portion or a convex portion to be fitted to each other is formed at a contact portion of the supply side locating pin or the receiving side locating pin. The work delivery method according to claim 1 or 2,
Either the supply-side locating pin or the receiving-side locating pin can be moved in and out of the supply-side work table or the receiving-side work table, and one of the supply-side locating pin or the receiving-side locating pin is pushed into the other. And delivering the workpiece from the workpiece supply mechanism to the workpiece receiving mechanism. The work delivery method according to claim 3,
A workpiece delivery method, wherein a workpiece support member that supports a workpiece is provided on the outer periphery of the supply side locate pin. The work delivery method according to claim 4,
A workpiece transfer method, wherein a clamp arm that moves up and down is provided in at least one of the supply side locating pin and the receiving side locating pin, and the workpiece is clamped by the clamp arm. The workpiece delivery method according to claim 5,
The workpiece support member has an escape portion that prevents a clamp arm provided in the receiving side locate pin and the workpiece support member from interfering with each other when the workpiece is delivered to the workpiece receiving mechanism. Characteristic work delivery method. A workpiece supply mechanism having at least two supply-side locate pins on the supply-side workpiece table;
A workpiece receiving mechanism that also has at least two receiving locating pins on the receiving work platform and receives a workpiece from the workpiece supply mechanism;
When the workpiece is transferred from the workpiece supply mechanism to the workpiece receiving mechanism, a supply side locating pin of the workpiece supply mechanism is inserted into a locating hole formed in the workpiece, and then the supply side locating pin is inserted into the workpiece receiving mechanism. The receiving side locating pin of the workpiece receiving mechanism is inserted into the same locating hole into which the supplying side locating pin is inserted, and the receiving side locating pin of the workpiece receiving mechanism is inserted from the opposite side across the workpiece. A workpiece transfer apparatus configured to transfer from a mechanism to the workpiece receiving mechanism.

Images