JP3597362B2 - Positioning device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a positioning device for positioning a work by inserting a pilot pin into a pilot hole of the work.
[0002]
[Prior art]
Conventionally, a method has been known in which a pilot pin is inserted from above into a pilot hole formed in a work, and processing such as punching is performed on the work from above. According to this method, since the workpiece is processed after the pilot pin is inserted into the pilot hole and the workpiece is positioned, the processing accuracy of the workpiece is improved.
[0003]
However, if the difference between the outer diameter of the pilot pin and the inner diameter of the pilot hole is reduced in order to securely fix the workpiece and improve machining accuracy, when the pilot pin is inserted into the pilot hole, the pilot pin will There is a disadvantage that the pilot hole is damaged due to contact with the periphery. In addition, if the difference between the outer diameter of the pilot pin and the inner diameter of the pilot hole is increased, damage to the pilot hole can be avoided, but the work cannot be fixed with high accuracy, and there is a disadvantage that machining accuracy is reduced.
[0004]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a positioning device which can solve such inconvenience and reliably position a work without damaging a pilot hole of the work.
[0005]
[Means for Solving the Problems]
A positioning device according to a first aspect of the present invention for solving the above problems is a positioning device that positions a work by placing the work on a table and inserting a pilot pin into a pilot hole formed in the work to position the work. The divided pilot portion is disposed in a storage portion opened on the table, and the pilot pin is divided into a plurality in the circumferential direction, and the divided pilot portion is formed on an outer portion of the divided pilot portion. Swing between a separation position where a portion protruding from the upper surface of the table is separated from the inner periphery of the pilot hole of the work and a contact position where the portion protrudes from the inner periphery of the pilot hole of the work. A rod which is freely supported, and which is provided in the storage portion and biases an inner portion of each divided pilot portion, thereby moving each divided pilot portion toward the separated position. And biasing means for tilting the Ri, provided above the table, by pressing the outer upper surface of each divided pilot portion, anti to abut the respective divided pilot unit the biasing force of the biasing means Pressing means for tilting around the rod toward a position.
[0006]
According to the positioning device having such a configuration, when the work is placed on the table such that the pilot hole is aligned with the storage portion, each divided pilot portion is rotated around the rod by the inner portion being biased by the biasing means. In the separated position. At this time, the portion protruding from the upper surface of the table on the outer side of the divided pilot portion is separated from the inner periphery of the pilot hole, and the pilot pin is inserted without contacting the pilot hole of the work. When the outer portion of each split pilot portion is pressed by the pressing means from this state, a force is applied to each split pilot portion to tilt around the rod toward the contact position against the urging force of the urging means. At this time, each of the divided pilot portions descends around the rod as a fulcrum, and tilts so that the inner portion rises to reach the contact position. The outer portion of the divided pilot portion at the contact position projects from the upper surface of the table and contacts the inner periphery of the pilot hole to fix the work.
[0007]
As described above, when inserted into the pilot hole, the pilot pin formed by each divided pilot portion does not contact the inner periphery of the pilot hole and comes into contact only for the first time after insertion, so that the pilot pin is not damaged without damaging the pilot hole. Positioning can be performed.
[0008]
When the work is transported in the horizontal direction and placed on the table, if the outer portion of each split pilot portion at the separation position projects too high from the upper surface of the table, the transfer of the work is hindered. On the other hand, if the protrusion is too low, each divided pilot portion may sink below the table upper surface when tilted around the rod. In this case, the work is not fixed because the divided pilot portions do not contact the inner periphery of the pilot hole of the work. Therefore, it is preferable to make it possible to contact the inner periphery of the pilot hole of the work when the divided pilot portion is tilted, and to minimize the protrusion of the outer portion of the divided pilot portion from the upper surface of the table at the separated position.
[0009]
For this reason, in the positioning device according to the first aspect of the present invention, a rod groove is formed below the middle abdomen of the divided pilot portion so that the divided pilot portion is movably fitted upward to the rod. When the portion is tilted around the rod toward the contact position, the divided pilot portion at the contact position protrudes from the upper surface of the table by a predetermined amount by contacting the lower portion of the outer portion of the divided pilot portion. A supporting portion to be set is provided in the storage portion of the table.
[0010]
According to the positioning device having such a configuration, when each divided pilot portion is tilted around the rod toward the contact position by the pressing means, the lower portion of the outer portion of the divided pilot portion contacts the support portion. Since the split pilot portion is movably fitted upward to the rod, the vertical movement of the split pilot portion is not hindered by the rod. Since the outer portion of the divided pilot portion is restricted from moving downward by contacting the support portion, a predetermined amount of the outer portion of the divided pilot portion at the contact position, that is, the inner peripheral portion of the pilot hole of the workpiece is used. Can protrude from the upper surface of the table enough to make contact with the table. Therefore, even if the height at which the outer portion of the divided pilot portion protrudes from the upper surface of the table at the separation position is suppressed to such an extent that the work is not hindered on the table, the outer portion at the contact position can be properly piloted. It is possible to contact the inner circumference of the hole.
[0011]
A positioning device according to a second aspect of the present invention for solving the above problems is a positioning device that positions a work by placing the work on a table, inserting a pilot pin into a pilot hole formed in the work, and positioning the work. A rod hole provided in the axial direction of the pilot pin and a storage portion opened in the table so as to have a portion protruding from the upper surface of the table, and the pilot pin is provided with reference to the rod hole. A divided pilot portion formed by dividing the pilot portion into a plurality of pieces in a circumferential direction, biasing means for biasing the divided pilot portion in a diameter reducing direction of the pilot pin, and a diameter portion larger than a diameter of the rod hole. and, by being inserted into the rod hole, lock to expand the split pilot portion diameter direction of the pilot pin and anti to the biasing force of the biasing means Together with the door, the guide groove provided along the radial direction of the pilot pins to each divided pilot portion, characterized in that by projecting guide pin into the housing portion to fit into the guide groove.
[0012]
According to the positioning device having such a configuration, when the work is placed on the table such that the pilot hole is aligned with the storage portion, each divided pilot portion is reduced in the diameter direction of the urging means, that is, in the direction toward the center of the pilot pin. Has been energized. At this time, the portion of the divided pilot portion protruding from the table upper surface is separated from the inner periphery of the pilot hole, and the pilot pin is inserted without contacting the pilot hole. When inserting a rod from the state to the rod hole of the pilot pin, since the diameter of the rod hole is smaller than the diameter of the rod, each of the divided pilot portion diameter direction of the pilot pin and anti to the biasing means, i.e. the center of the pilot pins Is applied to move away from the object. At this time, each divided pilot portion moves in the direction in which the diameter of the pilot pin increases, and a portion of each divided pilot portion protruding from the upper surface of the table abuts on the inner periphery of the pilot hole to fix the work.
[0013]
As described above, when inserted into the pilot hole, the pilot pin formed by each divided pilot portion does not contact the inner periphery of the pilot hole and comes into contact only for the first time after insertion, so that the pilot pin is not damaged without damaging the pilot hole. Positioning can be performed.
[0014]
When the rod is inserted into the rod hole, the divided pilot part may move in a direction deviated from the radial direction of the pilot pin and may not evenly contact the inner circumference of the pilot hole of the work, and the work may not be fixed sufficiently. is there. For this reason, it is preferable that each divided pilot section surely moves along the radial direction of the pilot pin.
[0015]
For this reason, in the positioning device according to the second aspect of the present invention, a guide groove is provided in each divided pilot portion along the radial direction of the pilot pin, and the guide pin protrudes into the storage portion so as to be fitted into the guide groove. Ru Tei is.
[0016]
According to the positioning device having such a configuration, since each divided pilot portion moves in the radial direction of the pilot pin along the guide pin, all the divided pilot portions uniformly contact the inner circumference of the pilot hole to more reliably work. Can be fixed and positioned.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the positioning device of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a positioning device according to the first embodiment, FIG. 2 is a plan view of a main part of the positioning device according to the first embodiment, and FIGS. 3 and 4 illustrate the positioning device according to the first embodiment. FIG. 5 is a side view of the positioning device of the second embodiment, FIG. 6 is a plan view of a main part of the positioning device of the second embodiment, and FIGS. 7 and 8 are the second embodiment. It is explanatory sectional drawing of the positioning device of a form.
[0018]
A positioning device according to a first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the positioning device of the present embodiment includes a table 1, a pilot pin 3 which is stored in a storage section 2 opened in the table 1, and partially protrudes from the upper surface of the table 1. And a pressing means 4 which is raised and lowered by a lifting means which does not push the upper end of the pilot pin 3. The work 6 in which the pilot hole 5 has been opened is placed on the table 1 so that the pilot pin 3 is inserted into the pilot hole 5, and is positioned by the pilot pin 3 as described later.
[0019]
Next, the positioning device shown in FIG. 1 will be described in more detail with reference to FIGS. As shown in FIG. 2, a pilot pin 3 is accommodated in a storage portion 2 opened in a cylindrical shape on a table 1, and the pilot pin 3 is composed of a divided pilot portion 7 divided into two in a circumferential direction. . The divided pilot unit 7 is urged toward the storage unit 2 by urging means 8 described later.
[0020]
As shown in FIG. 3, a pressing unit 4 is provided above the table 1. Further, a divided pilot section 7, a biasing means 8, a rod 9, and a support section 10 are provided in the storage section 2 of the table 1.
[0021]
The pressing unit 4 includes a lifting frame 11 that is raised and lowered by a lifting unit (not shown), a pressing block 13 that is connected to the lifting frame 11 via a guide rod 12 so as to be able to move up and down, and a spring 14 that urges the pressing block 13 downward. And
[0022]
The urging means 8 includes a hooking block 16 that hangs over a concave portion 15 formed substantially at the center of the inner portion 23 of the two divided pilot portions 7, and a urging rod 17 that extends below the hooking block 16. And a spring 18 for applying a downward urging force to the latch block 16 via the urging rod 17. The spring 18 is interposed between a flange 19 provided below the urging rod 17 and an upper inner wall of a base hole 21 provided in a base 20 to which the table 1 is fixed. The rod 9 is provided in parallel with the inner portion 23 of the divided pilot portion 7 as shown in FIG. 2, and is fitted into a rod groove 22 formed below the middle abdomen of the divided pilot portion 7 as shown in FIG. . The support portion 10 having a substantially rectangular parallelepiped shape is in contact with a lower portion of the outer portion 24 of the divided pilot portion 7.
[0023]
Next, the operation of the positioning device of the present embodiment will be described with reference to FIGS. As shown in FIG. 3, when the work 6 having the pilot hole 5 is placed on the table 1, the inner portion 23 of the divided pilot portion 7 is formed such that the concave portion 15 is formed on the retaining block 16 of the urging means 8. It is urged downward by contact. At this time, the split pilot portion 7 is located at the separated position where the portion 25 of the outer portion 24 protruding from the upper surface of the table 1 is separated from the inner periphery of the pilot hole 5. Further, the inner portion 23 of the divided pilot portion 7 is restricted from moving downward by abutting on the upper surface of the base portion 20. At this time, the pressing block 13 of the pressing means 4 is separated from the divided pilot unit 7 and is located above.
[0024]
With the work 6 placed on the table 1, the lifting frame 11 is lowered using lifting means (not shown). Accordingly, the pressing block 13 descends and presses the upper portion of the outer portion 24 of the divided pilot portion 7. Although this division pushes the divided pilot unit 7 around the rod 9, the divided pilot unit 7 abuts on the support unit 10 to restrict the inclination around the rod 9. At this time, the lower part of the outer part 24 slides toward the center of the pilot pin 3 along the support part 10, and the inner part 23 moves upward along the rod groove 22. That is, the divided pilot portion 7 uses the contact portion with the support portion 10 as a fulcrum X, and tilts such that the inner portion 23 moves upward while shifting the fulcrum X toward the center of the pilot pin 3.
[0025]
Then, as shown in FIG. 4, the split pilot portion 7 reaches a contact position where a portion 25 of the outer portion 24 protruding from the upper surface of the table 1 contacts the inner periphery of the pilot hole 5 of the work 6. The portion 25 of the outer portion 24 protruding from the upper surface of the table 1 is restricted from moving downward by the outer portion 24 abutting on the support portion 10. It does not sink below. Therefore, when the split pilot portion 7 is tilted, the outer portion 24 can have a portion protruding from the upper surface of the table 1 enough to abut the inner periphery of the pilot hole 5. Further, the movement of the divided pilot section 7 as a whole toward the center of the pilot pin 3 is restricted by the rod 9. Therefore, when the divided pilot portion 7 is tilted, it is possible to move the portion 25 of the outer portion 24 protruding from the table 1 in the outer diameter direction enough to abut the inner periphery of the pilot hole 5. .
[0026]
After the work 6 is positioned by the pilot pin 3, the lifting frame 11 of the pressing means 4 is further lowered. Then, as shown in FIG. 4, the spring 14 is contracted, and the work 6 is subjected to processing such as punching by a processing means (not shown) linked to the elevating frame 11. That is, the provision of the spring 14 ensures that the processing of the work 6 is performed after the work 6 is positioned.
[0027]
According to the positioning device of the present embodiment, when the pilot pin 3 including the two divided pilot portions 7 is inserted into the pilot hole 5, the pilot pin 3 does not contact the inner periphery of the pilot hole 5, but comes into contact only after the insertion. Therefore, the work 6 can be positioned without damaging the pilot hole 5.
[0028]
As described above, in the present embodiment, a configuration is adopted in which the divided pilot portion 7 abuts over substantially the entire inner circumference of the pilot hole 5. However, the present invention is not limited to this. For example, although not shown, the work 6 may be positioned by partially abutting the inner periphery of the pilot hole 5. Although not shown, the pilot pin 3 may be divided into three or more divided pilot portions so as to evenly contact the inner periphery of the pilot hole 5.
[0029]
Further, in the present embodiment, a configuration is adopted in which the divided pilot portion 7 is brought into contact with the support portion 10 and is movable along the rod groove 22 with respect to the rod 9. As another configuration example, although not shown, the support portion 10 may be omitted and the divided pilot portion 7 may swing about the rod 9 as a fulcrum. In this case, the height of a portion 25 of the outer portion 24 of the divided pilot portion 7 protruding from the upper surface of the table 1 at the separated position is sufficiently increased so that the table can be tilted when the divided pilot portion 7 is tilted around the rod 9. What is necessary is just to prevent it from sinking below the upper surface of 1.
[0030]
A positioning device according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 5, the positioning device according to the present embodiment is stored in a table 26 and a storage portion 27 formed in the table 26, has a rod hole 28 formed in the axial direction, and projects from the upper surface of the table 26. And a rod 30 which is raised and lowered by a lifting means (not shown) and inserted into the rod hole 28. The work 32 in which the pilot hole 31 is opened is placed on the table 26 so that the pilot pin 29 is inserted into the pilot hole 30, and is positioned by the pilot pin 29 as described later.
[0031]
Next, the positioning device shown in FIG. 5 will be described in more detail with reference to FIGS. As shown in FIG. 6, a pilot pin 29 is stored in a storage portion 27 formed in a cylindrical shape on the table 26, and the pilot pin 29 is formed of a divided pilot portion 33 formed by being divided into four in the circumferential direction. . The divided pilot portion 33 is urged in the radial direction of the pilot pin 29 by an O-ring 34 described later. A guide groove 35 is provided in the divided pilot portion 33 along the radial direction of the pilot pin 29. A guide pin 36 provided in the storage section 27 is fitted in the guide groove 35.
[0032]
As shown in FIG. 7, a rod 30 is provided above the table 26, and a divided pilot portion 33 having a guide groove 35, an O-ring 34, and a guide pin 36 are provided in the storage portion 27. The O-ring 34 is mounted in an O-ring groove 37 formed around the entire periphery of the side wall of the pilot pin 29. The width of the guide groove 35 is substantially narrower in the lower half than in the upper half. For this reason, a step 38 is formed in the divided pilot portion 33. The guide pin 36 includes a hook portion 39 that hooks on the step portion 38 of the divided pilot portion 33, and a rod portion 40 that extends downward from the hook portion 39.
[0033]
Next, the operation of the positioning device of the present embodiment will be described with reference to FIGS. As shown in FIG. 7, when a work 32 having a pilot hole 31 is placed on the table 26, the divided pilot portion 33 is urged by the O-ring 34 in the diameter reducing direction of the pilot pin 29. At this time, each divided pilot portion 33 is separated from the inner periphery of the pilot hole 31.
[0034]
With the work 32 placed on the table 26, the rod 30 is lowered by a lifting means (not shown) and inserted into the rod hole 28. Since the outer diameter of the rod 30 is larger than the inner diameter of the rod hole 28, a force that moves the pilot pin 29 in the radially expanding direction against the urging force of the O-ring 34 is applied to the divided pilot portion 33. Further, since the step portion 38 is hooked on the hook portion 39 of the guide pin 36, the divided pilot portion 33 does not float when the pilot pin 29 moves in the radial direction. Then, as shown in FIG. 8, each divided pilot portion 33 comes into contact with the inner periphery of the pilot hole 31 .
[0035]
According to the positioning device of the present embodiment, when the pilot pin 29 including the divided pilot portion 33 is inserted into the pilot hole 31 of the work 32, the pilot pin 29 does not contact the inner periphery of the pilot hole 31; The contact makes it possible to position the work 32 without damaging the pilot hole 31.
[0036]
In the present embodiment, the guide groove 35 and the guide pin 36 are provided. However, as another configuration example, the guide groove 35 and the guide pin 36 may be omitted. If the rod 30 abuts evenly on each of the divided pilot portions 33, the divided pilot portion 33 can be moved in the radially expanding direction of the pilot pin 29. Further, instead of the O-ring 34, another elastic urging means such as a spring may be provided. This also allows the divided pilot portion 33 to be urged in the diameter reducing direction of the pilot pin 29.
[0037]
In the above two embodiments, the configuration is adopted in which the cylindrical pilot pin 3 (29) abuts on the circular pilot hole 5 (31) to position the work 6 (32). As another configuration example, although not shown, when the pilot hole has a shape different from a circle, the divided pilot portion may be formed by matching the shape of the pilot pin to the shape. For example, if the pilot hole formed in the work is square, if a square pillar-shaped pilot pin is divided to form a divided pilot portion, each divided pilot portion abuts over substantially the entire circumference of the pilot hole and Positioning can be performed reliably.
[Brief description of the drawings]
FIG. 1 is a side view of a positioning device according to a first embodiment of the present invention; FIG. 2 is a plan view of a main part of the positioning device according to the first embodiment of the present invention; FIG. FIG. 4 is an explanatory sectional view of a positioning device according to a first embodiment of the present invention. FIG. 5 is a side view of a positioning device according to a second embodiment of the present invention. FIG. 7 is a plan view of a main part of a positioning device according to a second embodiment. FIG. 7 is an explanatory sectional view of a positioning device according to a second embodiment of the present invention. FIG. 8 is an explanatory sectional view of a positioning device according to a second embodiment of the present invention. [Explanation of symbols]
1 table, 2 storage section, 3 pilot pin, 4 pressing means, 5 pilot hole, 6 work, 7 split pilot section, 8 biasing means, 9 rod, 10 support section, 22 {Rod groove, 26} Table, 27} Storage section, 28} Rod hole, 29} Pilot pin, 30 # Rod, 33} Split pilot section, 34 # O-ring (biasing means), 35 # Guide groove, 36 # guide pin

Claims (3)

A positioning device that places a work on a table and inserts a pilot pin into a pilot hole formed in the work to position the work,
A divided pilot portion disposed in a storage portion opened in the table, wherein the pilot pin is formed by being divided into a plurality in the circumferential direction ,
The divided pilot portion is positioned at a separation position where a portion of the outer portion of the divided pilot portion protruding from the upper surface of the table is separated from the inner periphery of the pilot hole of the work and the inner periphery of the pilot hole of the work. A rod swingably supported between a contact position in a contact state,
Biasing means provided in the storage portion, and biasing the inner portion of each divided pilot portion to tilt each divided pilot portion around the rod toward the separated position;
The divided pilot portion is provided above the table and tilts around the rod toward the contact position against the urging force of the urging means by pressing the upper surface of the outer portion of each divided pilot portion. And a pressing means for causing the positioning device to move. A rod groove is opened below the middle abdomen of the divided pilot portion so that the divided pilot portion is movably fitted upward to the rod,
When the divided pilot portion is tilted around the rod toward the contact position, the divided pilot portion is brought into contact with a lower portion of an outer portion of the divided pilot portion, so that the divided pilot portion at the contact position is separated from the table upper surface by a predetermined amount. 2. The positioning device according to claim 1, wherein a support portion in a protruding state is provided in the storage portion of the table. A positioning device that places a work on a table and inserts a pilot pin into a pilot hole formed in the work to position the work,
A rod hole provided in the axial direction of the pilot pin,
A divided pilot portion which is provided in a storage portion opened in the table so as to have a portion protruding from the upper surface of the table, and is formed by dividing the pilot pin into a plurality of portions in the circumferential direction with reference to the rod hole; ,
Urging means for urging the divided pilot portion in the diameter reducing direction of the pilot pin,
A rod having a diameter portion larger than the diameter of the rod hole and being inserted into the rod hole, thereby expanding the divided pilot portion in the radial direction of the pilot pin against the urging force of the urging means; and it has a,
A positioning device , wherein a guide groove is provided in each divided pilot portion along a radial direction of the pilot pin, and a guide pin is protruded from the storage portion so as to be fitted in the guide groove .

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