JP2013127279A - Positioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate drive-in of a knock pin, in a positioning device having the knock pin driven into knock holes of a plurality of members to be positioned, and a spring collar for preventing the come-off of the knock pin.SOLUTION: A knock pin 6 comprises a head 10, a shaft 11 having an outside diameter which is the same as that of the head 10, and a tapered part 12 which is positioned between the shaft 11 and the head 10 and whose outside diameter is smaller than those of the head 10 and the shaft 11. An opened screw hole is formed at the end of the side of the head 10, a spring collar 7 is fit into the tapered part 12 in the radial direction, an inside diameter of the spring collar 7 in a free state is smaller than an outside diameter of the end TE2 of the tapered part at the side of the head 10 of the tapered part 12, and when driving the knock pin 6, the spring collar 7 is moved toward the end TE2 of the tapered part at the side of the head 10 by an effect that an outer peripheral surface of the spring collar 7 receives a friction force from the internal peripheral face of the knock hole 8, and elastically deformed in a direction in which the outside diameter is expanded in the radial direction.

Description

  The present invention relates to a positioning device having knock pins that are driven into knock holes formed in a plurality of members to be positioned that are positioned relative to each other.

  A positioning device of the above type has been conventionally known, and has been widely used for positioning various types of positioned members (see Patent Documents 1 and 2).

  FIG. 6 is a perspective view showing an example of a conventionally known positioning device. The positioning device 5A shown here has a knock pin 6A in which a screw hole 17A is formed in the center, and a ring-shaped spring collar 7A in which a part in the circumferential direction is cut out in a slit shape. 7A can be elastically deformed in the radial direction.

  In order to position the plurality of positioned members 3A and 4A shown in FIGS. 7 and 8, first, the first attachment tool 19A shown in FIG. 7A is attached to the knock pin 6A. In the first mounting tool 19A, one end side of a shaft 20A is a bolt portion (male screw portion) 21A, and two flanges 22A and 23A are fixed to the shaft 20A, and between the flanges 22A and 23A. A weight 24A is slidably fitted in the shaft 20A portion in the axial direction of the shaft 20A. The bolt portion 21A of the first mounting tool 19A is screwed into the screw hole 17A (FIG. 6) of the knock pin 6A, and the shaft 21A of the first mounting tool 19A is fixed to the knock pin 6A. After that, as shown in FIG. 7A, the tip of the knock pin 6A is aligned with the opening of the knock hole 8A formed in one positioned member 3A, and the weight 24A is slid along the shaft 20A by manual operation. While hitting the weight 24A against one flange 23A, an impact force is applied to the knock pin 6A so that the knock pin 6A is covered as shown in FIGS. 7 (b) and 8 (a). It is driven into knock holes 8A, 9A formed in the positioning members 3A, 4A. Thus, by positioning the knock pin 6A into the knock holes 8A and 9A, both the positioned members 3A and 4A can be correctly positioned.

  As described above, the knock pin 6A and the shaft 20A of the first attachment tool 19A are fixed, and the knock pin 6A is driven into the knock holes 8A and 9A by the first attachment tool 19A. The knock holes 8A and 9A can be driven in a stable state.

  When the knock pin 6A is driven into the knock holes 8A and 9A as shown in FIG. 8 (a), the first mounting tool 19A is removed from the knock pin 6A, and then, as shown in FIG. 8 (a), The spring collar 7A is driven into the knock hole 8A. The outer diameter of the spring collar 7A in a free state where no external force is applied to the spring collar 7A is set slightly larger than the diameter of the knock hole 8A.

  At the time of driving the spring collar 7A, the spring collar 7A cannot be driven using the first mounting tool 19A having the bolt portion 21A. Therefore, as shown in FIG. Using the tool 25A, with the tip of the tool 25A being in contact with the spring collar 7A, the second mounting tool 25A is hammered in the direction indicated by the arrow A with a hammer (not shown) to place the spring collar 7A into the knock hole 8A. Type in. At this time, since the outer diameter of the free spring collar 7A is set larger than the diameter of the knock hole 8A, the spring collar 7A fitted in the knock hole 8A is subjected to an external force received from the peripheral surface of the knock hole 8A. , Elastically deform in the direction of shrinking in the radial direction. Thereby, the outer peripheral surface of the spring collar 7A is pressed against the inner peripheral surface of the knock hole 8A. For this reason, as shown in FIG. 8B, the spring collar 7A serves as a stopper for preventing the knock pin 6A from coming out, and the opening of the knock hole 8A faces downward, or the positioned member 3A, Even if vibration is applied to 4A, the knock pin 6A is prevented from coming out of the knock holes 8A, 9A.

  As described above, the conventional positioning device 5A is also configured to prevent the knock pin 6A from coming out of the knock holes 8A and 9A. According to the conventional positioning device 5A, first, the first mounting tool is used. It is necessary to drive the knock pin 6A into the knock holes 8A and 9A using 19A, then remove the first mounting tool 19A from the knock pin 6A, and subsequently drive the spring collar 7A into the knock hole 8A with the second mounting tool 25A. Thus, since the knock pin 6A and the spring collar 7A are separately driven into the knock holes 8A and 9A by the different mounting tools 19A and 25A, the work man-hours increase and a long time is required for the work.

  Further, since the thickness of the spring collar 7A is very thin, the visibility of the spring collar 7A driven into the knock hole 8A is poor, and it is difficult to determine whether or not the spring collar 7A is driven into the knock hole 8A. For this reason, even if the spring collar 7A is forgotten to be attached to the knock hole 8A, it may not be noticed. In this way, if forgetting to drive the spring collar 7A, the knock pin 6A cannot escape the knock holes 8A and 9A.

Japanese Patent Laid-Open No. 2003-340884 JP-A-2005-42772

  SUMMARY OF THE INVENTION An object of the present invention is to provide a positioning device that eliminates the above-mentioned conventional drawbacks, can easily and quickly drive a knock pin and a spring collar into a knock hole, and can prevent forgetting to attach the spring collar. is there.

  In order to achieve the above object, the present invention has a knock pin that is driven into a knock hole formed in each of a plurality of positioned members that are positioned relative to each other, and the knock pin includes a head and an outer portion that is the same as the head. A shaft portion having a diameter, and a tapered portion located between the shaft portion and the head portion and having an outer diameter smaller than that of the head portion and the shaft portion. A screw hole extending along the head and opening at the end of the knock pin on the head side is formed, and the taper portion extends from the end of the taper portion on the shaft portion side to the end of the taper portion on the head side. The outer diameter is gradually enlarged toward the taper portion, and the spring collar that is elastically deformable in the radial direction is fitted to the taper portion so that the spring collar does not come out of the taper portion, and the knock pin is driven into the knock hole. In the state before The inner diameter of the free spring collar is set to be smaller than the outer diameter of the end of the tapered portion on the head side of the tapered portion so that the collar occupies a position away from the head, and the screw pin has a screw hole. When the bolt portion of the mounting tool is screwed in and the knock pin is driven into the knock hole from the tip of the shaft portion by the mounting tool, the outer peripheral surface of the spring collar receives frictional force from the inner peripheral surface of the knock hole. The spring collar moves relative to the taper portion toward the end of the taper portion on the head side, and the spring collar receives a radial external force received from the taper portion in the radial direction. The outer diameter of the spring collar in the free state is set so that the outer peripheral surface of the spring collar is pressed against the inner peripheral surface of the knock hole. It suggests positioning device being.

  According to the present invention, the knock pin and the spring collar can be simultaneously driven into the knock hole with one mounting tool, and the operation can be simplified. Moreover, since the knock pin and the spring collar are assembled and both are driven into the knock hole, the spring collar is never forgotten to be installed in the knock hole.

It is a front view which shows the outline of a press machine. It is a perspective view which isolate | separates and shows the knock pin and spring collar which comprise a positioning device. FIG. 3 is a front view showing a state where the knock pin and the spring collar shown in FIG. 2 are assembled, and is a view showing the spring collar in cross section. FIG. 4 is a partial cross-sectional explanatory view showing a state when the knock pin and the spring collar shown in FIG. 3 are driven into a knock hole. FIG. 4 is a partial cross-sectional explanatory view showing a state when the knock pin and the spring collar shown in FIG. 3 are driven into a knock hole. It is a perspective view which shows the knock pin and spring collar which comprise the conventional positioning device. FIG. 7 is a partial cross-sectional explanatory view showing a state when the knock pin shown in FIG. 6 is driven into a knock hole. FIG. 7 is a partial cross-sectional explanatory view showing a state when the spring collar shown in FIG. 6 is driven into a knock hole.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a front view showing an outline of a press machine for press-molding a metal plate. The press shown here has an upper die 1 and a lower die 2 located below the upper die 1. A metal plate (not shown) is set on the lower die 2, and the upper die 1 is lowered. The metal plate is sandwiched between the upper die 1 and the lower die 2 and pressed to press the metal plate into a predetermined form. After the molding, the upper mold 1 is raised and the molded metal plate on the lower mold 2 is taken out.

  Here, the upper mold 1 shown in FIG. 1 includes an upper mold body 4 and a block 3 that is correctly positioned and fixed to the upper mold body 4. The upper mold body 4 and the block 3 are made of heterogeneous metals having different hardnesses. In the illustrated example, the block 3 is made of a metal having a higher hardness than the upper mold body 4.

  The block 3 is correctly positioned with respect to the upper mold body 4 by the positioning device 5 according to the present invention at a location other than the effective molding surface F of the upper mold 1 and is mounted by an unillustrated mounting bolt. It is fixed to. As described above, the positioning device 5 of this example is used for positioning two positioned members including the block 3 and the upper mold body 4, but the positioning device 5 is used for positioning other appropriate positioned members. The positioning device according to the invention can also be used. In addition, the positioning device according to the present invention can be used to position three or more positioned members.

  FIG. 2 is a perspective view showing the positioning device 5 of this example, and FIG. 3 is a partial sectional front view of the positioning device 5. As shown in these drawings, the positioning device 5 includes a knock pin 6 and a spring collar 7. On the other hand, FIGS. 4 and 5 are partial cross-sectional explanatory views showing an operation when positioning the upper mold body 4 and the block 3 positioned relative to each other. As shown in FIGS. 4 and 5 and will be described later, the knock pin 6 is inserted into a plurality of positioned members to be positioned with respect to each other, in this example, the knock holes 8 and 9 formed in the block 3 and the upper mold body 4 respectively. This is used to correctly position the block 3 with respect to the upper mold body 4.

  As shown in FIGS. 2 and 3, the knock pin 6 is formed in a columnar shape having a substantially circular cross-sectional shape, and includes a head portion 10, a shaft portion 11, and between the shaft portion 11 and the head portion 10. And the taper portion 12 located at the center. The outer diameter D1 of the head portion 10 and the outer diameter D2 of the shaft portion 11 are set to the same size, and the outer diameter D3 of the tapered portion 12 is smaller than the outer diameters D1 and D2 of the head portion 19 and the shaft portion 11. Is set.

  The knock pin 6 of this example includes a first pin member 14 including a head portion 10, a tapered portion 12 formed integrally with the head portion 10, and a male screw portion 13 formed integrally with the tapered portion 12; A second pin member 15 constituting the shaft portion 11, and the male screw portion 13 of the first pin member 14 is screwed into a screw hole 16 formed in the second pin member 15 and fixed. Thus, the entire knock pin 6 including the head portion 10, the tapered portion 12, and the shaft portion 11 is configured. The knock pin 6 is made of a metal having high rigidity and high strength.

  As shown in FIGS. 2 and 3, the knock pin 6 is formed with a screw hole 17 extending along the center axis X (FIG. 3). The screw hole 17 is located on the head 10 side of the knock pin 6. Opened at the end.

  Furthermore, as shown in FIG. 3, the outer diameter D3 of the tapered portion 12 gradually increases from the tapered portion end TE1 on the shaft portion 11 side toward the tapered portion end TE2 on the head 10 side. Moreover, the spring collar 7 described briefly above is fitted to the tapered portion 12. As clearly shown in FIG. 2, the spring collar 7 is formed in a ring shape in which a part in the circumferential direction indicated by reference numeral G is cut out, and is made of a metal material rich in springiness. Therefore, the spring collar 7 can be elastically deformed relatively easily in the radial direction.

  Before connecting the first pin member 14 and the second pin member 15 shown in FIG. 2 as shown in the figure, the spring collar 7 is attached to the tapered portion 12 of the first pin member 14 as shown in FIG. Then, the male threaded portion 13 of the first pin member 14 is screwed into the threaded hole 16 of the second pin member 5 and tightened, as shown in FIG. The positioning device 5 fitted with 7 can be configured.

  As shown in FIG. 3, the inner diameter D4 of the spring collar 7 in a free state where no external force is applied is the outer diameter of the tapered portion end TE2 on the head 10 side of the tapered portion 12 (that is, the tapered portion 12). It is set smaller than the maximum outer diameter. Therefore, in a state before the knock pin 6 is driven into the knock holes 8 and 9 shown in FIGS. 4 and 5, the spring collar 7 is positioned away from the head 10 of the knock pin 6 as shown in FIG. In this state, the spring collar 7 fitted to the tapered portion 12 is fitted to the tapered portion 12 of the knock pin 6 so as not to come out of the tapered portion 12. Further, the inner peripheral surface of the spring collar 7 of this example is formed in a taper shape substantially along the taper of the taper portion 12.

  Here, in order to position and fix the positioned member made of the block 3 to the positioned member made of the upper mold body 4 shown in FIG. 1, first, the block 3 is temporarily attached to the upper mold body 4 by the mounting bolts described above. Stop. Next, as will be described in detail later with reference to FIGS. 4 and 5, the knock pin 6 is driven into the knock holes 8 and 9 to position the block 3 with respect to the upper mold body 4.

  FIG. 4A is a partial cross-sectional view showing a state before the knock pin 6 is driven into the knock holes 8 and 9. In the state shown in FIG. 4A, the center axis not shown of the knock hole 9 formed in the upper mold body 4 and the center axis not shown of the knock hole 8 formed in the block 3 are the same. In general, the center axes of these knock holes 8 and 9 do not exactly coincide with each other although they are almost coincident. Moreover, as described above, the spring collar 7 occupies a position away from the head 10 of the knock pin 6.

  Here, the attachment tool 19 is attached to the knock pin 6 shown in FIG. This mounting tool 19 is the same as the first mounting tool described above in the prior art, and one end side of the shaft 20 is a bolt portion 21 in which a male screw is formed. Two flanges 22 and 23 that are spaced apart from each other are fixed, and a weight 24 is slidably fitted in the axial direction of the shaft 20 at a portion of the shaft 20 between the flanges 22 and 23. .

  The bolt portion 21 of the mounting tool 19 is screwed into the screw hole 17 (FIGS. 2 and 3) of the knock pin 6, and the shaft 20 of the mounting tool 19 is fixed to the knock pin 6. Next, as shown in FIG. 4 (a), the tip of the shaft portion 11 of the knock pin 6 is aligned with the knock hole 8, and the shaft 20 of the mounting tool 19 is set up vertically with respect to the surface of the block 3, As shown in FIG. 4B, the operator strikes the weight 24 against one flange 23 while sliding the weight 24 with respect to the shaft 20 by manual operation, and applies an impact force to the knock pin 6. Add. By repeating such a hitting operation, the knock pin 6 is driven into the knock holes 8 and 9 as shown in FIGS. 5 (b), the tip of the knock pin 6 reaches the bottom of the knock hole 9 or a position in the vicinity thereof.

  In this manner, the knock pin 6 is driven into the knock holes 8 and 9 while applying an impact force to the knock pin 6 with the bolt portion 21 of the mounting tool 19 screwed into the screw hole 17 of the knock pin 6 and fastened. The long knock pin 6 can be driven into the knock holes 8 and 9 in a stable state. Finally, as shown in FIG. 5B, the mounting tool 19 is removed from the knock pin 6, and the operation of driving the knock pin 6 is completed.

  As described above, by knocking the knock pins 6 into the two knock holes 8 and 9, the center axes of the two knock holes 8 and 9 completely coincide with each other, and the block 3 is correctly positioned with respect to the upper mold body 4. Next, the block 3 can be firmly fixed to the upper mold body 4 by strongly tightening the mounting bolt described above.

  By the way, when the bolt portion 21 of the mounting tool 19 is screwed into the screw hole 17 of the knock pin 6 as described above, and the knock pin 6 is driven into the knock holes 8 and 9 from the tip of the shaft portion 11 by the mounting tool 19. As can be seen from FIGS. 5A and 5B, a large frictional force is applied to the outer peripheral surface of the spring collar 7 from the inner peripheral surface of the knock hole 8. Brake force is applied to the spring collar 7 entering the knock hole 8. On the other hand, since the knock pin 6 is driven into the knock holes 8 and 9, the spring collar 7 is relative to the tapered portion 12 of the knock pin 6 as shown in FIG. To the taper end TE2 on the head 10 side. At this time, as shown in FIG. 3, the outer diameter D3 of the tapered portion end TE2 on the head portion 10 side of the tapered portion 12 is set larger than the inner diameter D4 of the spring collar 7 in the free state. As the spring collar 7 approaches the tapered portion end TE2 on the head 10 side of the tapered portion 12, the spring collar 7 receives a radial external force from the outer peripheral surface of the tapered portion 12 and expands the diameter in the radial direction. Elastically deforms in the direction.

  Thereby, the outer peripheral surface of the spring collar 7 is pressed against the inner peripheral surface of the knock hole 8 with a large pressure. Therefore, the spring collar 7 functions as a stopper that prevents the knock pin 6 from coming out, and the knock pin 6 is prevented from coming out from the knock holes 8 and 9. The knock hole 8 opens downward, and a large impact is applied to the upper mold 1 shown in FIG. 1 during its operation, and an impact force is also applied to the knock pin 6. 7 prevents the knock pin 6 from coming out of the knock holes 8 and 9.

  As described above, in the positioning device 5 of this example, the bolt portion 21 of the mounting tool 19 is screwed into the screw hole 17 of the knock pin 6, and the knock pin 6 is knocked from the tip of the shaft portion 11 by the mounting tool 19. 8 and 9, the outer peripheral surface of the spring collar 7 receives a frictional force from the inner peripheral surface of the knock hole 8, so that the spring collar 7 has its head relatively to the tapered portion 12 of the knock pin 6. The spring collar 7 is elastically deformed in the direction of expanding the outer diameter in the radial direction by the radial external force received from the taper portion 12, and moves toward the taper end TE2 on the 19 side. The outer peripheral surface of the spring collar 7 is in pressure contact with the inner peripheral surface of the knock hole 8. The outer diameter D5 (FIG. 3) of the spring collar 7 in the free state is set so as to obtain such an action.

  Further, according to the positioning device 5 of this example, the same mounting tool 19 can be used to drive the knock pin 6 into the knock holes 8 and 9 just by continuing to apply an impact force to the knock pin 6, and to enlarge the diameter of the spring collar 7, Since the outer peripheral surface of the spring collar 7 is brought into pressure contact with the inner peripheral surface of the knock hole 8 and the knock pin 6 can be prevented from coming out, the entire operation can be simplified. The knock pin 6 and the spring collar 7 do not need to be separately driven into the knock holes 8 and 9, and the knock pin 6 can be driven and the knock pin 6 can be prevented from coming off with only one mounting tool 19.

  Further, since the spring collar 7 is pre-assembled to the knock pin 6 so as not to come out of the knock pin 6, the spring collar 7 must be driven into the knock hole 8, 9 only by driving the knock pin 6 into the knock holes 8, 9. Be driven into. For this reason, the spring collar 7 is not forgotten to be attached to the knock hole 8, and there is no possibility that the spring collar 6 comes out of the knock holes 8 and 9 and damages the press die during the press molding operation.

  Moreover, as shown in FIG. 2, the screw hole 17 is opened in the surface 30 of the head 10 of the knock pin 6, but the area of the surface 30 other than the opening is secured large. After driving 6 into the knock holes 8, 9, the surface 30 of the head 10 of the knock pin 6 can be easily and reliably visually recognized from the outside. For this reason, it is possible to determine whether or not the knock pin 6 has been driven into the knock holes 8 and 9 with a glance, and forgetting to knock the knock pin 6 can be prevented.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this embodiment, and various modifications can be made.

DESCRIPTION OF SYMBOLS 5 Positioning device 6 Knock pin 7 Spring collar 8, 9 Dowel hole 10 Head 11 Shaft part 12 Taper part 17 Screw hole 19 Mounting tool 21 Bolt part D1, D2, D3, D5 Outer diameter D4 Inner diameter TE1, TE2 Taper part end X Center axis

Claims (1)

A knock pin that is driven into a knock hole formed in each of a plurality of positioned members positioned relative to each other, the knock pin including a head, a shaft portion having the same outer diameter as the head portion, and the shaft portion The knock pin is located between the head and has a tapered portion whose outer diameter is smaller than that of the head and the shaft. The knock pin extends along a center axis thereof and the head of the knock pin. A screw hole opened at the end on the side of the shaft is formed, and the tapered portion gradually increases in outer diameter from the end of the tapered portion on the side of the shaft toward the end of the tapered portion on the side of the head. The spring collar is fitted into the taper portion so that the spring collar that is elastically deformable in the radial direction does not come out of the taper portion, and the spring collar is in the state before the knock pin is driven into the knock hole. A position away from the head The inner diameter of the spring collar in the free state is set to be smaller than the outer diameter of the end of the tapered portion on the head side of the tapered portion, and the bolt portion of the mounting tool is screwed into the screw hole of the knock pin, When the knock pin is driven into the knock hole from the tip end of the shaft portion by the mounting tool, the outer peripheral surface of the spring collar receives a frictional force from the inner peripheral surface of the knock hole, and the spring collar is moved to the tapered portion. The spring collar is elastic in the direction of expanding the outer diameter in the radial direction by the radial external force received from the tapered portion. A positioning device in which the outer diameter of the spring collar in a free state is set such that the outer peripheral surface of the spring collar is in pressure contact with the inner peripheral surface of the knock hole.

Images