JP2003266331A - Positioning tool for punching - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a positioning tool for punching capable of accurately forming a punched hole in a work piece by a punch and effecting accurate punching by a drill even when a marking off line is formed in a circular arc shape. <P>SOLUTION: A circular lower through-hole 11a is formed in the center of a lower plate part 11 and a circular upper through-hole 12a is formed in the central part of an upper plate part 12 in an upper part at a given distance from a lower plate part 11 and in parallel to the lower plate part 11. The lower plate part 11 and the upper plate part 12 are intercoupled through a coupling plate part 13, and a plurality of leg parts 14 to hold the lower plate part 11 at a given interval from the upper surface of a work piece 15 and in parallel to the upper surface of the work piece 15 are mounted on the under surface peripheral edge of the lower plate part 11. The hole center of the core through-hole 11a and the hole center of the upper through-hole 12a are formed in a manner to coincide with each other and face an intersection point 16a of the marking off line 16 formed on the work piece 15 through the upper through-hole 12a and the lower through-hole 11a. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning jig for accurately punching a punched hole in a work piece or for accurately drilling a work piece.

[0002]

2. Description of the Related Art Conventionally, a punch member having a tip projection is inserted into a through hole of a guide body, and a center alignment portion formed on an outer peripheral edge of the guide member is aligned with a marking line formed on a surface of a workpiece. Further, a punching method is disclosed in which the head of a punch member is struck to form a punch hole at the intersection of the marking lines, and then the punch hole is centered (Japanese Patent Laid-Open No. 2000-317862). The center aligning portions are four apex portions which are formed at equal intervals on the outer peripheral edge of the tip of the guide body and whose tips are sharp. With such a drilling method, since the punch hole position accuracy can be improved, the hole position accuracy can also be improved.

[0003]

However, in the above-described conventional drilling method, when the marking line is composed of circular arcs and straight lines, or is composed of circular arcs and circular arcs, the four apexes of the center alignment portion are formed on the marking line. However, there was a problem that the punch hole was displaced from the intersection of the marking lines. Further, in the above-described conventional drilling method, even when the marking lines are composed of straight lines, when the straight lines intersect in a non-orthogonal state, the four apexes of the center alignment portion are marked with the marking lines. Even if the punch holes were aligned with the line, there was a problem that the punch hole was displaced from the intersection of the marking lines.

According to the present invention, even if the marking line is composed of a circular arc and a straight line on a flat plate-shaped, cylindrical or cylindrical work piece,
Even if it is composed of arcs and arcs, or is composed of straight lines and straight lines that intersect in a non-orthogonal state, or is a point mark without marking lines (simple points, etc.),
An object of the present invention is to provide a positioning jig for drilling, which can accurately form a punch hole with a punch or can be accurately drilled with a drill.

[0005]

In order to achieve the above object, a drilling positioning jig of the present invention, as shown in FIGS. 1 to 3, has a lower plate having a circular lower through hole 11a formed in the center thereof. A lower plate portion 11, a lower plate portion 11, an upper plate portion 12 provided above the lower plate portion 11 at a predetermined interval and parallel to the lower plate portion 11, and having a circular upper through hole 12a formed in the center; A connecting plate portion 13 for connecting the upper plate portion 12 and a lower plate portion 11 attached to the lower surface peripheral edge of the lower plate portion 11 are provided with a predetermined gap from the upper surface of the workpiece 15 and the workpiece 15
A positioning jig for drilling, comprising: a plurality of legs 14 held in parallel with the upper surface, wherein the hole center of the lower through hole 11a and the hole center of the upper through hole 12a coincide with each other, and the upper through hole 12a and the lower through hole. 11a is formed so that a punch 17 or a drill can be inserted therethrough, and is configured to face an intersection 16a or a point mark of the marking line 16 formed on the workpiece 15 through the upper through hole 12a and the lower through hole 11a. And

As shown in FIGS. 1 to 3, the upper through hole 12
The ratio _D of the diameter _{D 1} of the a diameter _{D 2} and the lower hole 11a 2 /
It is effective that D ₁ is 1.5 to 2.0. In addition, it is preferable that the plurality of legs 14 be configured by a suction plate, a magnet block, or an elastic sheet in which magnet powder is dispersed. Further, as shown in FIGS. 4 and 5, the intersection 16a or the point mark of the marking line 16 of the workpiece 15 is enlarged between the lower plate portion 11 and the upper plate portion 12 or above the upper plate portion 12. And a lens 31 that can be visually recognized is provided.
It can be configured to be movable between a first position overlapping with and a second position separated from the upper through hole 12a and the lower through hole 11a. Further, as shown in FIG. 6, the plurality of leg portions 54 are made of a metal block, and a clamper 55 that can be fixed to the workpiece 15 is attached to any one or more of the plurality of leg portions 54. You can also

[0007]

First, a marking line 16 or a point mark is drawn on the surface of the work piece 15, and the jig 10 is placed on the work piece 15. In this state, the upper through hole 12a and the lower through hole 11
When looking at the work piece 15 through a, light shines from between the four leg portions 14, so that the marking line 16 or the point mark formed on the work piece 15 can be clearly seen. Next, the jig 10 is slid on the workpiece 15 so that the upper through hole 12
The hole center of "a" is made to coincide with the intersection point 16a or the point mark of the marking line 16 and the hole center of the lower through hole 11a. In this state, when the punch 17 is inserted into the upper through hole 12a and the lower through hole 11a and the tip thereof is brought into contact with the workpiece 15, the punch 1
7 is guided by the upper through hole 12a and the lower through hole 11a so that the tip of the punch 17 is always aligned with the intersection 16a of the marking line 16 or the point mark. Punch 17 in this state
Hitting the head of with a hammer, the intersection 16a of the marking line 16
Alternatively, the punch hole can be accurately formed in the point mark.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIGS. 1 to 3, a positioning jig 10 for perforation according to a first embodiment of the present invention includes a lower plate portion 11 formed in a substantially square plate shape and a lower plate. An upper plate part 12 provided above the part 11 at a predetermined distance and in parallel with the lower plate part 11.
A connecting plate portion 13 that connects the lower plate portion 11 and the upper plate portion 12, and four leg portions 14 attached to the lower surface peripheral edge of the lower plate portion 11. The lower plate portion and the upper plate portion may have a circular plate shape, and the connecting plate portion may have a columnar shape or a prismatic shape.

A circular lower through hole 11a is formed in the center of the lower plate portion 11, and a circular upper through hole 12a is formed in the center of the upper plate portion 12. Lower through hole 11
The a and the upper through hole 12a are formed such that their hole centers coincide with each other. As a result, the marking line 1 formed on the workpiece 15 through the upper through hole 12a and the lower through hole 11a.
6 so as to face the intersection 16a. The diameter D ₂ of the upper through hole 12a is preferably formed larger than the diameter D ₁ of the lower through hole 11a. That is, D ₂ / D ₁ is 1.
It is preferably set in the range of 5 to 2.0. D ₂ /
When D ₁ is less than 1.5, the work piece 1 is attached to these cores while aligning the upper through hole 12a to the lower through hole 11a.
When the intersection of the marking line 16 of 5 is aligned, the upper through hole 12a
As seen from the above, the peripheral edge of the lower through hole 11a is hidden by the peripheral edge of the upper through hole 12a, and the peripheral edge of the lower through hole 11a is difficult to see, and alignment becomes difficult. This is because the difference in diameter from 12a becomes too large and the concentricity determination accuracy decreases.

Lower plate portion 11 and upper plate portion 1
2 and the connecting plate portion 13 are formed into a substantially U shape by bending a flat bar. The lower plate part 11, the upper plate part 12, and the connecting plate part 13 may be separately manufactured, and then the lower plate part 11, the upper plate part 12, and the connecting plate part 14 may be integrated by welding or bolt connection. Further, it is preferable that the distance between the lower plate portion 11 and the upper plate portion 12, that is, the length of the connecting plate portion 13 is 20 to 40 mm. When the length of the connecting plate portion 13 is less than 20 mm, the tip of the punch 17 inserted into the upper through hole 12a and the lower through hole 11a has a large deflection, which makes it difficult to mount the lenses of the second and fourth embodiments, and is easy to use. Getting worse, 4
This is because if the distance exceeds 0 mm, the jig 10 becomes large and the convenience is lost.

The four leg portions 14 are formed by attaching blocks having a predetermined height to the lower surface corner portions of the lower plate portion 11, respectively. As a result, the lower plate portion 11 is separated from the upper surface of the workpiece 15 by a predetermined distance (3 to 1).
5 mm) and held parallel to the upper surface of the work piece 15. In the present embodiment, the work piece 15 is formed of a ferromagnetic material such as a steel plate or a nickel plate, and the four legs 14 are formed of magnet blocks. The four legs may be made of elastic sheets in which magnet powder is dispersed instead of the magnet block. Further, when the workpiece is made of a non-magnetic material such as aluminum or plastics, it is preferable to form the four legs by a suction cup. Also, when punching holes near the outer peripheral edge of the work piece, the legs are removed from the lower plate part and their positions are shifted, or a small plate having the same thickness as the work piece is adjacent to the work piece. If the jig is placed over the workpiece and the small piece plate, the punch hole can be accurately punched on the workpiece. Moreover, the legs may be two, three or more than five instead of four.

On the other hand, a punch 17 is formed so that it can be inserted into the upper through hole 12a and the lower through hole 11a. The punch 17 includes a conical portion 17a having a sharp tip that abuts the surface of the workpiece 15, and a cylindrical first cylindrical portion 17b having a distal end continuously connected to the base end of the conical portion 17a and slightly thinner than the lower through hole 11a.
And a second columnar portion 17c having a columnar shape whose tip is continuously provided to the base end of the first columnar portion 17b and which is slightly thinner than the upper through hole 12a. When the lower through hole 11a has a diameter of 4 mm, for example, the upper through hole 12a has a diameter of 6 to 8 mm. The diameter of the first cylindrical portion 17b is preferably smaller than the diameter of the lower through hole 11a by 0.05 to 0.10 mm, and the diameter of the second cylindrical portion 17c is smaller than that of the lower through hole 11a.
The diameter is preferably 0.05 to 0.10 mm smaller. The length of the conical portion 17a is substantially the same as the height of the leg portion 14, and the length of the first cylindrical portion 17b is substantially the same as the length of the connecting plate portion 13. Also the first
The tapered portion 1 is provided between the column portion 17b and the second column portion 17c.
7d is provided. The tapered portion 17d is the first cylindrical portion 1
The diameter is gradually increased from 7b toward the second cylindrical portion 17c.

A method of using the positioning jig 10 for drilling configured as described above will be described. First, the work piece 1 made of steel plate
A marking line 16 is drawn on the surface of 5. Next, the workpiece 15
When the jig 10 is placed on the workpiece 15, the four legs 14 are attracted to the workpiece 15 by the magnetic force, and the jig 10 is temporarily fixed on the workpiece 15. In this state, when looking at the workpiece 15 through the upper through hole 12a and the lower through hole 11a, light shines from between the four leg portions 14, so that the marking line 16 formed on the workpiece 15 can be clearly seen. it can. Next, the jig 10 is slid on the workpiece 15 against the suction force of the leg portion 14 so that the hole center of the upper through hole 12a coincides with the intersection point 16a of the hole line 11a and the marking line 16. Let

In this state, the punch 17 is inserted into the upper through hole 12a.
When the conical portion 17a at the tip is inserted into the lower through hole 11a by inserting the first cylindrical portion 17b into the upper through hole 12a.
Is located and the tip of the conical portion 17a is brought into contact with the surface of the workpiece 15, the first cylindrical portion 17b is located in the lower through hole 11a and the second cylindrical portion 17c is located in the upper through hole 12a. As a result, the punch 17 can be smoothly inserted into the upper through hole 12a and the lower through hole 11a, and the punch 1
7 is guided by the upper through hole 12a and the lower through hole 11a, and when the tip of the conical portion 17a contacts the surface of the workpiece 15, the tip of the conical portion 17a always coincides with the intersection 16a of the marking line 16. . When the head of the punch 17 is hit with a hammer in this state, a punch hole is formed at the intersection 16a of the marking line 16. As a result, whether the marking line 16 is formed by an arc and a straight line, an arc and an arc, or a straight line and a straight line that intersect in a non-orthogonal state, the punch 15 is accurately punched. Holes can be formed. Even if the marking line is not clear, the punch hole can be accurately formed in the workpiece 15 if there are point marks such as dots.

4 and 5 show a positioning jig for perforation according to the second embodiment of the present invention. In the second embodiment, between the lower plate portion 11 and the upper plate portion 12, a convex lens or the like in which the intersection 16a of the marking line 16 of the workpiece 15 and the peripheral edge of the lower through hole 11a are enlarged and visible. Lens 31 is provided. The lens 31 is moved by the lens moving means 32 to the first position where the lens 31 overlaps the upper through hole 12a and the lower through hole 11a, and the upper through hole 12a.
And a second position that is disengaged from the lower through hole 11a. The lens moving means 32 is the lens 31.
And a guide rail 32b that is horizontally attached to the connecting plate portion 13 and slidably supports the base end of the holder 32a. Locking means 33 is attached to the connecting plate portion 13. Although the locking means 33 is not shown, the steel ball faces the tip of the case,
In addition, the steel ball is urged in the protruding direction by the compression coil spring built in the case. The steel ball of the lock means 33 holds the holder 32 when the lens 31 reaches the first position.
It has a function of being locked to a and temporarily fixing the lens 31 to the first position. The lens may be provided above the upper plate portion, not between the lower plate portion and the upper plate portion. Since the configuration other than the above is the same as that of the first embodiment, the description thereof is omitted.

A method of using the positioning jig 30 for punching configured as described above will be described. Workpiece 15 with jig 30
When the lens 31 is placed on the workpiece, the lens 31 is moved to the first position, and the workpiece 15 is viewed through the upper through hole 12a and the lower through hole 11a in this state, the marking line 16 formed on the workpiece 15 and The peripheral edge of the lower through hole 11a is enlarged by the lens 31 and looks large. As a result, it becomes easier to slide the jig 30 on the workpiece 15 so that the hole center of the upper through hole 12a coincides with the intersection point 16a of the scribe line 16 with the hole center of the lower hole 11a. In addition, the core of the upper through hole 12a is set to the lower through hole 1
The punch 17 is inserted into the upper through hole 12a and the lower through hole 11a after the lens 31 is moved to the second position by matching the hole center of 1a with the intersection 16a of the marking line 16. The usage other than the above is the same as that of the first embodiment, and thus the description thereof is omitted.

FIG. 6 shows a drilling positioning jig according to a third embodiment of the present invention. In the third embodiment, the plurality of leg portions 54 are made of a metal block, and a clamper 55 that can be fixed to the workpiece 15 is attached to any one or two or more of the leg portions 54. It This clamper 5
The jig 5 is configured such that the jig 50 can be fixed to the workpiece 15 by gripping the workpiece 15. The clamper 55
Is a stay 56 that is hung at the tip of the leg portion 54 and has a large number of teeth 56a formed thereon, and a sliding plate 58 that has a knob bolt 57 screwed at the base end and the tip is slidably fitted into the stay 56. An engaging piece 59 having a claw 59a that is rotatably attached to the tip of the sliding plate 58 and is selectively engageable with the large number of teeth 56a. The locking piece 58 is urged by the torsion coil spring 60 in a direction to lock the teeth 56a. Since the configuration other than the above is the same as that of the first embodiment, the description thereof is omitted.

A method of using the positioning jig 50 for punching configured as described above will be described. First, the jig 50 is placed on the workpiece 15, and the workpiece 15 is viewed through the upper through hole 12a and the lower through hole 11a. Next, the jig 50 is slid on the workpiece 15 so that the hole center of the upper through hole 12 a coincides with the intersection 16 a of the scribe line 16 with the hole center of the lower through hole 11 a. In this state, the leg portion 54 is clamped by the clamper 55 to the workpiece 15
Fixed to. At this time, the leg portion 54 can be quickly fixed to the workpiece 15 by pushing up the sliding plate 58 and then slightly turning the knob bolt 57. As a result, punch 1
7 through the upper through hole 12a and the lower through hole 11a,
Even if a punch hole is formed at the intersection 16a of the marking line 16, the jig 50 is more difficult to shift.
A punch hole can be accurately formed in 6a. Clamp 5
When removing 5 from the work piece 15, it is possible to quickly remove it from the work piece 15 by detaching the claw 59a of the locking piece 59 from the tooth 56a of the stay 56. The usage other than the above is the same as that of the first embodiment, and thus the description thereof is omitted.

7 and 8 show a positioning jig for perforation according to the fourth embodiment of the present invention. In the fourth embodiment, the lens 31 is moved by the lens moving means 132 so that the lens 31 overlaps the upper through hole 12a and the lower through hole 11a at a first position in which the lens 31 is horizontal and the upper through hole 12a and the lower through hole. It is configured to be movable between a second position that is vertically downward and deviates from 11a. The lens moving means 132 includes a holder 132a for holding the lens 31, and a holder 132a.
And a pair of hinges 132c for rotatably holding the base end of the hinge via a shaft 132b. Locking means 133 is attached to the connecting plate portion 13. The locking means 133 has a case 133a inserted into the connecting plate portion 13, and a center pin 133b having a flat tip surface and a tip portion protruding from the tip of the case 133a.
And the center pin 133 built in the case 133a.
and a compression coil spring 133c for urging b in a direction projecting from the case 133a. This center pin 133
b is pressed against the base end surface of the holder 32a by the compression coil spring 133c when the lens 31 is rotated to the first position (horizontal position), whereby the lens 31 is temporarily moved to the first position (horizontal position). Fixed. On the other hand, the center pin 133b is pressed against one surface of the holder 32a by the compression coil spring 133c when the lens 31 is rotated to the second position (stored position), so that the lens 31 moves to the second position ( It is temporarily fixed to the storage position). Since the configuration other than the above is the same as that of the second embodiment, the description thereof will be omitted. Also, the operation is almost the same as the operation of the second embodiment, and therefore the description is omitted.

A drill such as a drilling machine may be inserted into the upper through hole and the lower through hole instead of the punch.
In this case, the diameters of the upper through hole and the lower through hole are formed to be the same, and the workpiece can be directly and accurately drilled. Here, in order to prevent the peripheral edges of the upper through hole and the lower through hole from being cut by a drill, it is preferable to quench-treat the lower plate portion and the upper plate portion. In addition, even if the work piece is not a flat plate shape but a cylindrical shape or a cylindrical shape, or a point mark without marking lines (a simple point, etc.) is formed on the work piece, a punch is applied to the work piece. Can be used to accurately form punch holes, or can be drilled accurately.

[0021]

The present invention is carried out in the form as described above, and has the following effects. A circular lower through hole is formed in the center of the lower plate section, a circular upper through hole is formed in the center of the upper plate section, the lower plate section and the upper plate section are connected by the connecting plate section, and the lower surface of the lower plate section is connected. Attach multiple legs to the periphery,
Further, since the hole center of the lower through hole and the hole center of the upper through hole are formed so as to coincide with each other, when the jig is placed on the workpiece, the upper through hole and the lower through hole are viewed through the workpiece. Four
Light shines from between the legs, and the marking line or the point mark formed on the workpiece can be clearly seen. Also, slide the jig over the work piece to align the hole center of the upper hole with the intersection of the hole hole and the marking line or the point mark, and then use a punch or drill to move the hole through the upper hole and the lower hole. The tip of the punch or drill can be aligned with the intersection of the marking lines or the point mark with a relatively simple operation of inserting the punch or the drill. As a result, a punch hole can be accurately formed at a predetermined position of the work piece, or a punch hole can be accurately formed at a predetermined position of the work piece.

If the ratio D ₂ / D ₁ of the diameter D1 of the lower through hole and the diameter D2 of the upper through hole is set in the range of 1.5 to 2.0, the above effect can be remarkably exhibited. Also, if the legs are composed of a suction plate, a magnet block, or an elastic sheet in which magnet powder is dispersed, the jig can be temporarily fixed to the surface of the workpiece. The jig is less likely to be displaced when forming a hole or when drilling.

Further, between the lower plate portion and the upper plate portion, or above the upper plate portion, a visible lens is provided by enlarging the intersection or the point mark of the marking line of the workpiece, and this lens is used as the upper lens. If it is configured to be movable between a first position that overlaps the through hole and the lower through hole and a second position that deviates from the upper through hole and the lower through hole, the intersection point of the marking line or the point mark can be enlarged through the lens. Since it can be visually recognized, a punch hole can be formed more accurately with a punch or a punch can be drilled more accurately. Furthermore, if a plurality of legs are made of metal blocks and a clamper is attached to these legs, the jig is further improved when forming punch holes on the surface of the work piece or when drilling the work piece. It becomes difficult to shift.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line AA of FIG. 2 of a positioning jig for perforation according to a first embodiment of the present invention.

FIG. 2 is a view on arrow B of FIG.

FIG. 3 is an exploded perspective view including the jig, the punch, and the work piece.

FIG. 4 is a sectional view taken along the line CC of FIG. 5, showing a positioning jig for punching according to a second embodiment of the present invention.

5 is a sectional view taken along line DD of FIG.

FIG. 6 is a sectional view showing a positioning jig for perforation according to a third embodiment of the present invention, which corresponds to FIG. 1.

FIG. 7 is a sectional view taken along line EE of FIG. 8 showing a positioning jig for punching according to a fourth embodiment of the present invention.

8 is a cross-sectional view taken along line FF of FIG.

[Explanation of symbols]

Positioning jig for drilling 10,30,50 11 Lower plate part 11a Lower through hole 12 Upper plate part 12a Upper through hole 13 Connection plate part 14,54 legs 15 Workpiece 16 marking lines 16a intersection of marking lines 17 punch 31 lens 55 Clamper

Claims (5)

[Claims] 1. A lower plate portion (11) having a circular lower through hole (11a) formed in the center thereof, and a lower plate portion (11a) above the lower plate portion (11) with a predetermined gap. ) And a circular upper through hole (12a) is formed in the center of the upper plate portion (1
2), a connecting plate portion (13) for connecting the lower plate portion (11) and the upper plate portion (12),
A plurality of lower plate portions (11) are attached to the lower edge of the lower plate portion (11) and hold the lower plate portion (11) at a predetermined distance from the upper surface of the workpiece (15) and in parallel with the upper surface of the workpiece (15); A positioning jig for perforation, comprising a leg portion (14), the center of the lower through hole (11a) and the upper through hole (12).
The punch (17) or the drill is inserted through the upper through hole (12a) and the lower through hole (11a) so as to be aligned with the hole center of a), and the upper through hole (12a) and the lower through hole are formed. A positioning jig for perforation, which is configured to face an intersection (16a) or a point mark of marking lines (16) formed on the workpiece (15) through (11a). Wherein the ratio _D 2 / _{D 1} of the diameter _{D 1} of the diameter _{D 2} and the lower hole of the upper hole (12a) (11a) is 1.5
The positioning jig for perforation according to claim 1, wherein the positioning jig is 2.0. 3. The plurality of legs (14) are provided by a suction cup.
The positioning jig for perforation according to claim 1, which is constituted by a magnet block or an elastic sheet in which magnet powder is dispersed. 4. Between the lower plate portion (11) and the upper plate portion (12), or between the upper plate portion (1).
A lens (31) which is visible by enlarging the intersection (16a) of the marking line (16) or the point mark of the workpiece (15) is provided above 2), and the lens (31) is an upper through hole. (12a) and the first position overlapping the lower through hole (11a), the upper through hole (12a) and the lower through hole (11).
The positioning jig for perforation according to claim 1, which is configured to be movable between a second position which is apart from (a). 5. A clamper capable of being fixed to a workpiece (15) on any one or more of the plurality of legs (54), wherein the plurality of legs (54) are made of a metal block. 55) The positioning jig for perforation according to claim 1, further comprising: