JP2000108088A - Hammering mechanism of punching machine unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure straight advancing property in the vertical operation of a punch as well as to improve changing workability and detachability of a punch. SOLUTION: A hammering mechanism in a punching machine unit having a punch ram 22 attached to a punch setting part of a unit main body U and having a hammering mechanism 38 of a punch 38 and a punch holder 54 provided on the punch ram is improved. A hammer part 50 is provided by being connected to a driving part of the hammering mechanism arranged on a punch ram 22, the hammer part connects a hammer 52 connected to the driving part through a coupling 53 to the punch holder 54 and a bearing cage 55 is interposed in the surface to which the hammer and the punch holder are to be connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching mechanism for a punching unit, and more particularly, to a punching device for punching a pattern or a reference hole in a printed board, a flexible film, a metal foil, a ceramic green sheet, or the like. The present invention relates to a punch elevating / lowering device in a unit in which a plurality of units are installed.

[0002]

2. Description of the Related Art In a conventional punching machine unit, a punching machine is generally known in which a punch ram is attached to a punch setting portion of a unit body and a punch driving mechanism and a punch holder are provided on the punch ram. However,
A hitting mechanism in a conventional unit is configured by connecting a hammer to a rod of a driving unit (generally an air cylinder) and disposing the hammer immediately above a punch supported by a punch holder. The holder and the holder were configured separately. Therefore, even when the punching mechanism is lifted up and removed from the punch ram during punch replacement, the punch holder and the punch remain on the punch ram, and it is necessary to remove the punch holder and the punch from the punch ram. Was. In order to solve this problem,
The punch holder may be integrally connected to the hammer of the striking mechanism. However, if it is used alone, there is a problem in the mounting accuracy between the hammer and the punch holder, and it is difficult to secure the straightness in the vertical movement of the punch. Conventionally, a means for attaching a punch to a punch holder has a complicated structure and operation for accurately aligning the punch because it is necessary to ensure the straightness of the punch.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above circumstances, and has as its object to improve the workability of punch replacement and to ensure the straightness of the punch when the punch is moved up and down. Another object of the present invention is to enhance the operability of attaching and detaching a punch when replacing a punch.

[0004]

According to the present invention, a punch ram is mounted on a punch setting portion of a unit body, and a punching mechanism and a punch holder are provided on the punch ram. A support to be supported is vertically movably mounted, and a hammer portion is provided in connection with a driving portion thereof.The hammer portion connects a hammer and a punch holder connected to the driving portion via a coupling, and A bearing cage is interposed on the surface where the hammer and the punch holder are joined.

As a specific structure of the hammer portion, the hammer is provided with a flange having a thread, and the punch holder is sandwiched and integrally connected by screwing the hammer to a coupling. Item 2), More specifically, the coupling is such that a bottom portion through which a shaft cylinder portion of the punch holder penetrates and a flange portion of the holder is engaged, and a flange of the hammer is screwed to an upper portion. The coupling has a threaded portion, a punch holder is inserted through the coupling, and the hammer is inserted into the shaft cylinder of the punch holder. In the bearing cage, bearings are rotatably fitted in the annular cage at equal circumferential intervals, and upper and lower surfaces of the bearing cage are projected upward and downward from the cage. As described above, this bearing cage may be provided only on the surface where the hammer and the punch holder are joined, but not only that, but also between the lower surface of the flange portion of the punch holder and the bottom surface of the coupling. It is more preferable in terms of function to intervene. Specifically, a bearing cage is interposed between the upper surface of the flange portion of the punch holder and the lower surface of the flange of the hammer, and between the lower surface of the flange portion of the punch holder and the bottom surface of the coupling. ).

Further, as a specific structure of the punch holder, a punch insertion hole is formed in the bottom surface of the shaft cylinder portion to have a small diameter, and a slot is formed in a peripheral wall including the insertion hole.
The insertion hole is expanded and contracted by rotation of a bolt passing through the slot (claim 5).

[0007]

According to the present invention, since the hammer and the punch holder are connected by the hammer portion of the driving mechanism, the punch holder can be lifted together with the punch by lifting the support and removing the driving mechanism from the punch ram. It is possible to perform punch replacement work. And
In the use state of the punching unit, the bearing cage is interposed between the hammer and the punch holder, and a slight lateral displacement effect may occur between the two members. It is absorbed by the lateral displacement action. According to the fifth aspect of the present invention, when the punch is replaced, the punch insertion hole can be expanded and contracted by rotating the bolt to insert and remove the punch.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. In FIG. 1, U is a unit body (hereinafter, referred to as a punch unit) exemplifying a unit using a fine-diameter punch. , This punch unit U
One or more units are positioned and mounted at predetermined intervals on the work table of the drilling device A. The punch unit U has a horizontal U-shaped flat thin shape composed of an upper case 2a and a lower case 2b via a notch space 1 for moving a work formed in the upper and lower central portions. The die setting unit 10 is arranged in the lower case 2b, and the punch setting unit 20 is arranged in the upper case 2a.

A through hole 11 is formed in the die setting section 10 so as to penetrate the lower case 2b up and down, and the die holder is coaxial with the through hole 11.
12 is detachably attached and fixed. This die holder 12
The die 13 is tightly mounted on the center fitting portion.
Although not shown, attached members such as an air blowing passage for facilitating separation of the punched waste and a discharge hose for the punched waste are detachably attached to the die holder 12.

In the punch setting portion 20, support holes 21, 21 penetrating vertically through the upper case 2a are formed at intervals in the front and rear.
The support rod 23 of the punch ram 22 is inserted into each of the support holes 21 from above, and the punch ram 22 is mounted. In the punch setting section 20, a rod hole 24 is formed in the middle of the front and rear support holes 21 and 21 so as to penetrate vertically, and the piston rod of a cylinder / piston structure 25 is provided in the punch ram 22 in the rod hole 24. Insert 26.

The cylinder / piston structure 25 includes a punch ram
Driving means for moving up and down 22;
A cylinder chamber 27 is formed in the punch ram 22 between the cylinder chamber 27 and the piston rod 26 to which a piston 26a is fixed is slidably inserted through the cylinder chamber 27 in a seal-like manner. The air passages 28 and 28 'are connected to the chamber and the lower chamber, respectively, so as to apply air pressure in a timely manner. In the cylinder / piston structure 25, the piston rod 26 is projected below the punch ram 22, inserted into the rod hole 24 of the punch setting section 20 from above, and attached to the punch setting section 20. The piston rod 26 inserted into the rod hole 24 is fixed to the punch setting unit 20 by a hook shaft 29 penetrating through the upper case 2a. Therefore,
Since the piston rod 26 of the cylinder / piston structure 25 is fixed, the piston ram 22 rises when air pressure is applied to the upper chamber of the cylinder chamber 27, and
When the air pressure is applied to the lower chamber, the piston ram 22 is moved up and down.

The punch ram 22 has a vertical portion 22a hanging from the front surface of the upper case 2a and a lower end of the vertical portion 22a.
The vertical portion 22a is integrally provided with a horizontal portion 22b protruding above the through-hole 11, and the punching mechanism 33 is mounted on the upper front surface of the vertical portion 22a, and the horizontal portion 22b is provided with an opening 34 penetrating vertically. .
The driving mechanism (air cylinder) 35 using the air pressure is driven by a driving unit (air cylinder) 35 via a support 36 to the vertical portion 22 of the punch ram 22.
The punch 38 attached to the punch holder 54 is moved by the hammer unit 50 connected to the drive unit 35 and connected to the drive unit 35 to move the punch 38 up and down. The support body 36 of the striking mechanism 33 is integrally provided with a support wall 36a projecting above the punch ram 22 on the upper surface thereof, and two guide rods 30 projecting downward from the support wall 36a are opened in the punch ram 22. By being inserted into the support holes 31, respectively, the rear surface is vertically movably mounted on the front surface of the vertical portion 22a of the punch ram 22, and is detachably mounted upward. Also,
The striking mechanism 33 can finely adjust the height position by moving the support 36 up and down by the micrometer 40, and thereby can finely adjust the initial position of the punch 38.

On the lower surface of the horizontal portion 22b of the punch ram 22,
The pat ring 41 is attached by bolting, and the guide bush 42 is integrally fixed to the pat ring 41 in a state where the guide bush 42 is centered. The guide bush 42 is
The punch 38 is slidably inserted into the guide bush 42 so as to face the hammer 50 of the driving mechanism 33 through the opening 34 of the 22. The pat ring 41 is arranged so as to be vertically opposed to the die holder 12 at the time of initial mounting, and is set using a jig or the like so that the two members 41 and 12 are concentric. In the drawing, reference numeral 43 denotes a stripper bushing, and reference numeral 44 denotes a front table.

The punching unit may be a punch ram.
Drilling operation is performed by driving the cylinder / piston structure 25 and the cylinder / piston structure 25 which are the driving means of 22. That is, first, the punch ram 22 moves down together with the striking mechanism 33 to perform a predetermined centering operation in a state where the put ring 41 is close to a work (not shown), and then a state in which the work is held between the put ring 41 and the die holder 12. Then, the cylinder / piston structure 25 is driven, and the punch 38 is lowered by the hammer 50 to punch a workpiece. Thereafter, the hammer unit 50 and the punch ram 22 move up and return to complete one operation, and repeat the operation while moving the work. According to this punching machine unit, the cylinder / piston structure 25 which is a driving means for the punch / ram 22 is formed on the punch ram 22 side.
Only the space for forming the rod hole 24 into which the 25 piston rods 26 are inserted may be considered.

Next, the striking mechanism which is a main part of the present invention.
The details of the hammer section 33 will be described with reference to FIGS. The driving mechanism 33 includes the driving unit (air cylinder) 35
A hammer 52 is connected to a lower end of the piston rod 51, and the hammer 52 is screw-coupled to a coupling 53 to thereby integrally connect a punch holder 54 holding an upper end of the punch 38. . Ie hammer
52 has a threaded flange 52a, the coupling 53 has a bottom surface 53a through which the shaft cylinder portion 54a of the punch holder 54 penetrates and engages the flange portion 54b of the holder 54, and a hammer at the top. It has a screw portion 53b for screw-connecting the 52 flange 52a. After the punch holder 54 is inserted through the coupling 53, the hammer 52 is connected to the shaft cylinder 54 of the punch holder 54.
a, and the flange 52a of the hammer 52 is screw-coupled to the threaded portion 53b of the coupling 53 so that the three members are integrally connected.

When the above members are connected, the upper surface of the flange portion 54b of the punch holder 54 and the lower surface of the flange 52a of the hammer 52 and the lower surface of the flange portion 54b of the punch holder 54 and the bottom surface 53a of the coupling 53 are connected. In between, upper bearing cage 5
5. The lower bearing cage 56 is interposed. Bearing cages 55 and 56 are
7, 58 are rotatably fitted, and the upper and lower surfaces of the upper and lower cages are respectively protruded above and below the cage.

The punch holder 54 has a punch insertion hole 59 having a small diameter formed in the bottom surface of the shaft cylinder portion 54a and a slot 60 formed in a peripheral wall including the insertion hole 59, and penetrates the slot 60. The insertion hole 59 is expanded and contracted by screwing the bolt 61 and rotating the bolt 61. In the punch holder 54, the upper end of the punch 38 is inserted into the insertion hole 59, and the punch 61 is fixed by rotating the bolt 61 to contract the insertion hole 59. The upper end of the punch 38 held by the punch holder 54 is in contact with the lower end of the hammer 52.

According to the configuration of the hammer 50,
Since the punch holder 54 is integrally connected to the hammer 50 of the driving mechanism 33, the punch holder 54 can be integrally pulled out by pulling out and detaching the driving mechanism 33 from the punch ram 22. It becomes remarkably simple compared with. Moreover, since the punch 38 can be attached and detached by inserting the upper end of the punch 38 into the insertion hole 59 of the punch holder 54 and rotating the bolt 61, the attaching / detaching operation is extremely easy. Further, since the hammer portion 50 has the bearing cage 55 interposed between the upper and lower surfaces of the flange portion 54b of the punch holder 54, a slight lateral displacement action occurs in the radial direction between the hammer 52 and the punch holder 54, and both Even when the axes of the members 52 and 54 are not accurately set, the deviation due to the axis eccentricity can be absorbed by the lateral deviation action, and the straightness in the vertical movement of the punch 38 can be secured. .

[0019]

According to the present invention, since the punching mechanism is removed from the punch ram by lifting the support, the punch holder and the punch can also be lifted.
These removal operations can be performed in one step, and therefore, punch replacement operations are easier than in the past.
Further, in the use state of the punching unit, the bearing cage is interposed between the hammer and the punch holder, so that a slight lateral displacement action may occur between the two members, so that the axes of the two members are not accurately set. Even in this case, the deviation due to the shaft eccentricity is absorbed by the lateral deviation effect, and therefore, the straightness in the vertical movement of the punch can be ensured.

According to the second aspect of the present invention, a specific connecting structure for simply and securely connecting the hammer and the punch holder is obtained. According to the third aspect, the hammer and the punch holder are further firmly integrated. According to the fourth aspect of the present invention, it is possible to more reliably absorb the above-described deviation of the shaft eccentricity between the hammer and the punch holder, and further improve the straightness in the vertical movement of the punch. it can.
Further, according to the fifth aspect of the present invention, since the punch of the punch holder can be attached and detached by rotating the bolt, the operability of attaching and detaching the punch at the time of punch replacement is improved.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing an outline of a punching machine unit provided with a driving mechanism of the present invention.

FIG. 2 is an enlarged cross-sectional view of a hammer portion of a striking mechanism and a guide portion of a punch.

FIG. 3 is an exploded perspective view of a hammer unit in FIG. 2;

[Explanation of symbols]

U: Punch unit (unit body) 2
0: Punch setting section 33: Driving mechanism 35: Drive mechanism 3
6: Support 38: Punch 50: Hammer 52: Hammer 52
a: Tsuba 53: Coupling 53a: Bottom 53
b: Screw 54: Punch holder 54a: Shaft cylinder 54
b: Flange 55: Bearing cage 56: Bearing cage 59: Punch insertion hole 60: Slot 6
1: Bolt

Continued on the front page. (72) Inventor Tomoe Okano 268, Shimogamida, Haruki, Togo-cho, Aichi-gun, Aichi Prefecture 268 U.H.T.

Claims (5)

[Claims] A punch ram is mounted on a punch setting portion of a unit main body, and a punching mechanism and a punch holder are provided on the punch ram. A hammer portion is provided in connection with the driving portion, and the hammer portion connects the hammer and the punch holder connected to the driving portion via a coupling, and is provided on a surface where the hammer and the punch holder are joined. A driving mechanism for a drilling machine unit, wherein a bearing cage is interposed. 2. The hammer includes a flange having a screw,
2. The punching mechanism for a punching machine unit according to claim 1, wherein said hammer is screw-coupled to a coupling to pinch and integrally connect said punch holder. 3. The coupling has a bottom surface through which a shaft tube portion of the punch holder penetrates and engages a flange portion of the holder, and a screw portion at an upper portion for screw-connecting a flange of the hammer. The punching mechanism according to claim 2, wherein a punch holder is inserted through the coupling, and the hammer is inserted into a shaft cylinder of the punch holder. 4. A bearing cage is interposed between the upper surface of the flange portion of the punch holder and the lower surface of the flange of the hammer, and between the lower surface of the flange portion of the punch holder and the bottom surface of the coupling. The punching mechanism of the drilling machine unit according to claim 3. 5. The punch holder according to claim 1, wherein a punch insertion hole is formed in a small diameter at a bottom surface of the shaft cylindrical portion, and a slot is formed in a peripheral wall including the insertion hole, and a bolt that passes through the slot is rotated. The hitting mechanism of a drilling machine unit according to any one of claims 1 to 4, wherein the insertion hole is expanded and contracted by the following.