Punching device

Abstract

To provide a punching device for a metal pipe which is able to remove the metal pipe after punching even when burrs are left on the metal pipe.SOLUTION: A punching device 1 is a device for forming a plurality of holes or notches in a metal pipe SP. The punching device 1 includes: a cylindrical support fitting 3 covered with the metal pipe SP and supporting the metal pipe SP from inside; a plurality of punches 6, 7, 8, 9 configured to punch the metal pipe SP supported by the support fitting 3; and a push-out mechanism 17 configured to push out the metal pipe SP, supported by the support fitting 3, from the support fitting 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a punching device. [Background technology]

[0002] Patent document 1 discloses a pipe processing device comprising a first punch capable of reciprocating in a direction perpendicular to the axis of the pipe to be processed, a fixed second punch arranged opposite the first punch so that its tip surface faces the first punch, and a receiving bracket disposed between the first punch and second punch and inserted into the inside of the pipe to position the pipe to be processed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4562724 Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of pipe processing device (punching processing device), when the first punch and the second punch are used to punch a processed pipe (metal pipe), there is a risk that burrs on the processed pipe will get caught on the receiving bracket, making it impossible to remove the processed pipe from the receiving bracket.

[0005] The present invention has been made in consideration of the above problems, and has an object to provide a punching device that can remove a processed metal tube even if burrs are formed on the metal tube. [Means for solving the problem]

[0006] (1) The present invention relates to a punching apparatus (for example, punching apparatus 1 described later) that forms a plurality of holes (for example, hole H described later) or notches (for example, notch N described later) in a metal tube (for example, metal tube SP described later), characterized in that the punching apparatus comprises a cylindrical support bracket (for example, support bracket 3 described later) that is fitted over the metal tube and supports the metal tube from the inside, a plurality of punches (for example, punches 6, 7, 8, 9 described later) that punch out the metal tube supported by the support bracket, and an extrusion mechanism (for example, extrusion mechanism 17 described later) that extrudes the metal tube supported by the support bracket from the support bracket.

[0007] (2) The present invention also provides the punching device according to (1) above, characterized in that the plurality of punches include two pairs of punches whose tips face each other.

[0008] (3) The present invention also relates to the punching processing device described in (2) above, characterized in that the two pairs of punches are arranged so that a first direction (e.g., first direction D1 described below) in which the pair of punches punches the metal tube of one set and a second direction opposite to the first direction (e.g., second direction D2 described below) are perpendicular to a third direction (e.g., third direction D3 described below) in which the pair of punches punches the metal tube of the other set and a fourth direction opposite to the third direction (e.g., fourth direction D4 described below).

[0009] (4) The present invention also relates to a housing (e.g., housing 2 described later) to which the support fitting is fixed, a frame (e.g., frame 4 described later) to which one of the paired punches of the one set (e.g., punch 6 described later) is fixed and which is slidable in the first direction and the second direction relative to the housing together with the one of the paired punches of the one set, biasing means (e.g., biasing means 5 described later) that limits the sliding movement of the frame with a force, and a first extension mechanism (e.g., The punching processing device described in (3) above is characterized in that it comprises a first telescopic mechanism 14 described later) and a stopper (for example, stopper 11 described later) fixed to the other of the pair of punches of the one set and abuts against the metal tube after the other of the pair of punches of the one set extends in the first direction to punch out the metal tube, and when the other of the pair of punches of the one set extends in the first direction after the stopper abuts against the metal tube, the frame slides in the second direction together with the first telescopic mechanism against the force of the biasing means, and one of the pair of punches of the one set punches out the metal tube.

[0010] (5) The present invention also relates to the punching device described in (4) above, characterized in that it includes a second telescopic mechanism (e.g., second telescopic mechanism 15 described later) that is fixed to the housing and extends one of the paired punches of the other set (e.g., punch 8 described later) in the third direction and contracts it in the fourth direction relative to the housing, and a third telescopic mechanism (e.g., third telescopic mechanism 16 described later) that is fixed to the housing and extends the other of the paired punches of the other set (e.g., punch 9 described later) in the fourth direction and contracts it in the third direction relative to the housing. Effect of the Invention

[0011] According to the punching device of the present invention described above in (1) to (5), even if burrs are generated on the metal pipe, the processed metal pipe can be removed. [Brief description of the drawings]

[0012] [Figure 1] 1 is a front view of a punching device according to an embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a front view of the metal tube after processing. [Figure 4] FIG. 2 is a side view of the metal tube after processing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, a punching device according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0014] First, the configuration of the punching device 1 will be described with reference to Figures 1 and 2. Furthermore, the configuration of a metal pipe SP after processing by the punching device 1 (see Figures 1 and 2) will be described with reference to Figures 3 and 4. Figure 1 is a front view of the punching device 1. Figure 2 is a side view of the punching device 1. Figure 3 is a front view of the metal pipe SP after processing. Figure 4 is a side view of the metal pipe SP after processing.

[0015] The punching apparatus 1 shown in Figures 1 and 2 is an apparatus that punches out the end of a metal pipe SP, such as a steel pipe, to form a plurality of holes H (see Figures 3 and 4) or notches N (see Figures 3 and 4) in the metal pipe SP.

[0016] Specifically, the punching processing device 1 includes a housing 2, a support bracket 3, a frame body 4, a biasing means 5, a plurality of punches 6, 7, 8, 9, a plurality of stoppers 10, 11, 12, 13, a first extension mechanism 14, a second extension mechanism 15, a third extension mechanism 16, an extrusion mechanism 17, and a controller 18.

[0017] The housing 2 includes a bottom plate 21, a top plate 22, a pair of left and right side plates 23, 24, and a back plate 25, which are integrally formed.

[0018] The bottom plate 21 has a through hole 21a through which the punch 6 passes, and a pair of left and right through holes 21b, 21c through which a pair of left and right connecting rods 43, 44 constituting the frame body 4 pass. It has.

[0019] The top plate 22 has a through hole 22a through which the punch 7 passes, and a pair of left and right through holes 22b, 22c through which a pair of left and right connecting rods 43, 44 that constitute the frame body 4, and a pair of left and right coil springs 51, 52 that constitute the biasing means 5 pass.

[0020] The left side plate 23 has a through hole 23a through which the punch 8 passes. The second telescopic mechanism 15 is fixed to the outer surface of the left side plate 23.

[0021] The right side plate 24 has a through hole 24a through which the punch 9 passes. The third telescopic mechanism 16 is fixed to the outer surface of the right side plate 24.

[0022] The back plate 25 has through holes 25a, 25b, 25c, and 25d through which the four push rods 74, 75, 76, and 77 pass. A support bracket 3 is fixed to the inner surface of the back plate 25 so as to extend forward. In addition, a bracket 71 constituting the push-out mechanism 17 is fixed to the outer surface of the back plate 25.

[0023] The support bracket 3 is fixed to the inner surface of the back plate 25 constituting the housing 2 so as to extend forward. The support bracket 3 is a cylindrical metal fitting that is fitted with the metal tube SP and supports the metal tube SP from the inside. The support bracket 3 also has a number of punch receiving holes 3a, 3b, 3c, 3d into which a number of punches 6, 7, 8, 9 for punching out the metal tube SP fit together with punched metal scraps (not shown).

[0024] The frame body 4 has one of the paired punches 6, 7 (punch 6) of one of the two pairs of punches 6, 7, 8, 9 fixed thereto, and is capable of sliding relative to the housing 2 in a first direction D1 and a second direction D2 opposite to the first direction D1 together with the one of the paired punches 6, 7 (punch 6).

[0025] Specifically, the frame body 4 comprises an upper plate 41 arranged above the top plate 22 constituting the housing 2 so as to be parallel to the top plate 22, a lower plate 42 arranged below the bottom plate 21 constituting the housing 2 so as to be parallel to the bottom plate 21, and a pair of left and right connecting rods 43, 44 that connect the upper plate 41 and the lower plate 42 to each other.

[0026] The upper plate 41 has a through hole 41a through which the punch 7 passes. On the upper surface of the upper plate 41, the first telescopic mechanism 14 is fixed.

[0027] A punch 6 is fixed to the upper surface of the lower plate 42 with its tip facing upward.

[0028] The left connecting rod 43 is disposed so as to pass through the through hole 21b of the bottom plate 21 constituting the housing 2 and the through hole 22b of the top plate 22 constituting the housing 2. A coil spring 51 constituting the biasing means 5 is placed on the left connecting rod 43.

[0029] The right connecting rod 44 is disposed so as to pass through the through hole 22c of the bottom plate 21 constituting the housing 2 and the through hole 22c of the top plate 22 constituting the housing 2. A coil spring 52 constituting the biasing means 5 is placed on the right connecting rod 44.

[0030] The biasing means 5 applies force to limit the sliding movement of the frame 4. Specifically, the biasing means 5 includes a pair of coil springs 51, 52 on the left and right.

[0031] The left coil spring 51 is placed over the connecting rod 43 constituting the frame 4, and is disposed between the upper surface of the bottom plate 21 constituting the housing 2 and the lower surface of the top plate 41 constituting the frame 4 so as to pass through the through-hole 22b of the top plate 22 constituting the housing 2. The left coil spring 51 is fixed to both the upper surface of the bottom plate 21 constituting the housing 2 and the lower surface of the top plate 41 constituting the frame 4.

[0032] The right coil spring 52 is placed over the connecting rod 44 constituting the frame 4, and is disposed between the upper surface of the bottom plate 21 constituting the housing 2 and the lower surface of the top plate 41 constituting the frame 4 so as to pass through the through-hole 22c of the top plate 22 constituting the housing 2. The right coil spring 52 is fixed to both the upper surface of the bottom plate 21 constituting the housing 2 and the lower surface of the top plate 41 constituting the frame 4.

[0033] The multiple punches 6, 7, 8, 9 are tools for punching out the metal tube SP supported by the support bracket 3. The multiple punches 6, 7, 8, 9 are divided into two sets of punches 6, 7 whose tips face each other, and punches 8, 9 whose tips face each other.

[0034] The two sets of paired punches 6, 7, 8, 9 are arranged so that the first direction D1 and second direction D2 in which the paired punches 6, 7 of one set punch the metal tube SP are perpendicular to the third direction D3 in which the paired punches 8, 9 of the other set punch the metal tube SP and the fourth direction D4 opposite to the third direction D3.

[0035] The punch 6 is one of the pair of punches 6, 7 of one set, and is fixed to the upper surface of the lower plate 42 constituting the frame body 4 so that its tip faces upward. The punch 6 is disposed so as to pass through the through hole 21a of the bottom plate 21 constituting the housing 2 and to face the punch receiving hole 3a of the support fitting 3. The punch 6 is slidable in the first direction D1 and the second direction D2 relative to the housing 2 together with the frame body 4, and by sliding in the second direction D2 (upward) relative to the housing 2, the punch 6 punches out the metal pipe SP supported by the support fitting 3, and forms a hole H (see FIGS. 3 and 4) in the metal pipe SP. As a result, the tip of the punch 6 and the metal scraps (not shown) punched out of the metal pipe SP reach the punch receiving hole 3a of the support fitting 3.

[0036] The punch 7 is the other of the pair of punches 6, 7 of one set, and is disposed so as to pass through the through hole 41a of the upper plate 41 constituting the frame body 4 and the through hole 22a of the top plate 22 constituting the housing 2, and to face the punch receiving hole 3b of the support fitting 3, and is attached to the first extension mechanism 14. This punch 7 is configured to extend in the first direction D1 relative to the frame body 4 and contract in the second direction D2 by the first extension mechanism 14, and punches out the metal pipe SP supported by the support fitting 3 by extending in the first direction D1 (downward) relative to the frame body 4, and forms a hole H (see Figures 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 7 reach the punch receiving hole 3b of the support fitting 3.

[0037] The punch 8 is one of the punches 8, 9 of the other set, and is disposed so as to pass through the through hole 23a of the left side plate 23 constituting the housing 2 and to face the punch receiving hole 3c of the support fitting 3, and is attached to the second telescopic mechanism 15. This punch 8 is configured to extend in the third direction D3 and contract in the fourth direction D4 relative to the housing 2 by the second telescopic mechanism 15, and punches out the metal pipe SP supported by the support fitting 3 by extending in the third direction D3 (rightward) relative to the housing 2, and forms a notch N (see Figures 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 8 reach the punch receiving hole 3c of the support fitting 3.

[0038] The punch 9 is the other of the pair of punches 8, 9 of the other set, and is disposed so as to pass through the through hole 24a of the right side plate 24 constituting the housing 2 and to face the punch receiving hole 3d of the support fitting 3, and is attached to the third telescopic mechanism 16. This punch 9 is configured to extend in the fourth direction D4 relative to the housing 2 and contract in the third direction D3 by the third telescopic mechanism 16, and punches out the metal pipe SP supported by the support fitting 3 by extending in the fourth direction D4 (leftward) relative to the housing 2, and forms a notch N (see Figures 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 9 reach the punch receiving hole 3d of the support fitting 3.

[0039] The stopper 10 is fixed to the base end side of one of the paired punches 6, 7 (punch 6) of one set, and is slidable integrally with one of the paired punches 6, 7 (punch 6) of the one set in the first direction D1 and the second direction D2 relative to the housing 2. This stopper 10 abuts against the metal pipe SP after one of the paired punches 6, 7 (punch 6) of the one set extends in the second direction D2 (upward) to punch out the metal pipe SP.

[0040] The stopper 11 is fixed to the base end side of the other of the paired punches 6, 7 (punch 7) of one set, and is slidable integrally with the other of the paired punches 6, 7 (punch 7) of the one set in the first direction D1 and the second direction D2 relative to the housing 2. This stopper 11 abuts against the metal pipe SP after the other of the paired punches 6, 7 (punch 7) of the one set extends in the first direction D1 (downward) to punch out the metal pipe SP.

[0041] The stopper 12 is fixed to the base end side of one (punch 8) of the pair of punches 8, 9 of the other set, and is configured to extend in the third direction D3 and contract in the fourth direction D4 together with the one (punch 8) of the pair of punches 8, 9 of the other set relative to the housing 2. This stopper 12 abuts against the metal pipe SP after the one (punch 8) of the pair of punches 8, 9 of the other set extends in the third direction D3 (rightward) to punch out the metal pipe SP.

[0042] The stopper 13 is fixed to the base end side of the other of the paired punches 8, 9 of the other set (punch 9), and is adapted to extend in the fourth direction D4 and contract in the third direction D3 together with the other of the paired punches 8, 9 of the other set with respect to the housing 2. This stopper 13 abuts against the metal pipe SP after the other of the paired punches 8, 9 of the other set (punch 9) extends in the fourth direction D4 (leftward) to punch out the metal pipe SP.

[0043] The first telescopic mechanism 14 is composed of a hydraulic cylinder or an electric cylinder, and is controlled by the controller 5. This first telescopic mechanism 14 is fixed to the upper surface of the upper plate 41 constituting the frame body 4, and has a punch 7 attached thereto. The first telescopic mechanism 14 extends the other of the pair of punches 6, 7 (punch 7) in one set in a first direction D1 (downward) relative to the frame body 4, and contracts it in a second direction D2 (upward).

[0044] The second telescopic mechanism 15 is composed of a hydraulic cylinder or an electric cylinder, and is controlled by the controller 5. This second telescopic mechanism 15 is fixed to the outer surface of the left side plate 23 constituting the housing 2, and has a punch 8 attached thereto. The second telescopic mechanism 15 also extends one (punch 8) of the other pair of punches 8, 9 relative to the housing 2 in the third direction D3 (rightward) and contracts it in the fourth direction D4 (leftward).

[0045] The third telescopic mechanism 16 is composed of a hydraulic cylinder or an electric cylinder, and is controlled by the controller 5. This third telescopic mechanism 16 is fixed to the outer surface of the right side plate 24 constituting the housing 2, and has a punch 9 attached thereto. The third telescopic mechanism 16 also extends the other of the other pair of punches 8, 9 (punch 9) in the fourth direction D4 (leftward) and contracts it in the third direction D3 (rightward) relative to the housing 2.

[0046] The pushing mechanism 17 is a mechanism that pushes out the metal tube SP supported by the support fitting 3 from the support fitting 3. Specifically, the pushing mechanism 17 includes a bracket 71, a cylinder 72, an intermediate plate 73, and a plurality of push rods 74, 75, 76, and 77.

[0047] Bracket 71 is fixed to the outer surface of back plate 25 constituting housing 2, and forms a partitioned space behind housing 2. Cylinder 72 is fixed to the back surface of bracket 71. Bracket 71 also has a through hole 71a through which shaft 72a of cylinder 72 passes.

[0048] The cylinder 72 is composed of a hydraulic cylinder or an electric cylinder, and is controlled by the controller 5. The cylinder 72 is fixed to the rear surface of the bracket 71 so that a shaft 72a of the cylinder 72 is arranged in the front and rear. The shaft 72a of the cylinder 72 is arranged to pass through a through hole 71a of the bracket 71, and an intermediate plate 73 is fixed to the tip of the shaft 72a. The cylinder 72 slides the intermediate plate 73 and multiple push rods 74, 75, 76, and 77 fixed to the intermediate plate 73 back and forth relative to the bracket 71 and the housing 2 by extending and retracting the shaft 72a.

[0049] The intermediate plate 73 is disposed in a space partitioned by the bracket 71, and connects the shaft 72a of the cylinder 72 and the multiple push rods 74, 75, 76, and 77. The shaft 72a of the cylinder 72 is fixed to the rear surface of the intermediate plate 73, and the multiple push rods 74, 75, 76, and 77 are fixed to the front surface of the intermediate plate 73. The intermediate plate 73 slides back and forth by the cylinder 72, thereby sliding the multiple push rods 74, 75, 76, and 77 back and forth.

[0050] The multiple push rods 74, 75, 76, and 77 are arranged facing forward and backward so as to penetrate through the through holes 25a, 25b, 25c, and 25d of the back plate 25 that constitutes the housing 2, respectively, and have their base ends fixed to the intermediate plate 73. These multiple push rods 74, 75, 76, and 77 slide forward and backward by the cylinder 72. Furthermore, the multiple push rods 74, 75, 76, and 77 slide forward and strike the metal pipe SP supported by the support bracket 3, and continue to slide forward, pushing the metal pipe SP out of the support bracket 3.

[0051] The controller 5 controls the first telescopic mechanism 14, the second telescopic mechanism 15, the third telescopic mechanism 16 and the cylinder 72 in response to input signals from operations.

[0052] Next, the operation of the punching device 1 will be described with reference to FIG.

[0053] The punching device 1 is used with the support fitting 3 covered with the metal pipe SP.

[0054] First, by operating the controller 5, the first extension mechanism 14 extends the other of the pair of punches 6, 7 (punch 7) in the first direction D1 (downward) relative to the frame 4. The punch 7 extends in the first direction D1 (downward) relative to the frame 4, punching out the metal pipe SP supported by the support fitting 3 and forming a hole H (see FIGS. 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 7 reach the punch receiving hole 3b of the support fitting 3.

[0055] Thereafter, the punch 7 extends in the first direction D1 (downward) relative to the frame body 4, causing the stopper 11 to butt against the metal pipe SP. Thereafter, the punch 7 extends in the first direction D1 (downward) relative to the frame body 4, causing the frame body 4 to slide in the second direction D2 (upward) together with the first extension mechanism 14 against the force of the biasing means 5, and the punch 6 fixed to the frame body 4 punches out the metal pipe SP, forming a hole H (see FIGS. 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 6 reach the punch receiving hole 3a of the support fitting 3.

[0056] Thereafter, by operating the controller 5, the first extension mechanism 14 contracts the punch 7 in the second direction D2 (upward) relative to the frame body 4. As the punch 7 contracts in the second direction D2 (upward) relative to the frame body 4, the frame body 4 slides in the first direction D1 (downward) together with the first extension mechanism 14, and the punch 6 fixed to the frame body 4 retreats from the punch receiving hole 3a of the support bracket 3 and the hole H of the metal pipe SP (see FIGS. 3 and 4).

[0057] Thereafter, the punch 7 contracts in the second direction D2 (upward) relative to the frame 4, whereby the punch 7 retreats from the punch receiving hole 3b of the support fitting 3 and the hole H of the metal pipe SP (see FIGS. 3 and 4).

[0058] Furthermore, by operating the controller 5, the second telescopic mechanism 15 extends one (punch 8) of the other pair of punches 8, 9 in the third direction D3 (rightward) relative to the housing 2. The punch 8 extends in the third direction D3 (rightward) relative to the housing 2, punching out the metal pipe SP supported by the support fitting 3 and forming a notch N (see FIGS. 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 8 reach the punch receiving hole 3c of the support fitting 3.

[0059] Thereafter, by operating the controller 5, the second telescopic mechanism 15 contracts the punch 8 in the fourth direction D4 (leftward) relative to the housing 2. By contracting the punch 8 in the fourth direction D4 (leftward) relative to the housing 2, the punch 8 retreats from the punch receiving hole 3c of the support fitting 3 and the notch N of the metal pipe SP (see FIGS. 3 and 4).

[0060] Furthermore, by operating the controller 5, the third extension mechanism 16 extends the other of the pair of punches 8, 9 (punch 9) in the fourth direction D4 (leftward) relative to the housing 2. The punch 9 extends in the fourth direction D4 (leftward) relative to the housing 2, punching out the metal pipe SP supported by the support bracket 3 and forming a notch N (see FIGS. 3 and 4) in the metal pipe SP. As a result, the metal scraps (not shown) punched out of the metal pipe SP and the tip of the punch 9 reach the punch receiving hole 3d of the support bracket 3.

[0061] Thereafter, by operating the controller 5, the third extension mechanism 16 contracts the punch 9 in the third direction D3 (rightward) relative to the housing 2. By contracting the punch 9 in the third direction D3 (rightward) relative to the housing 2, the punch 9 retreats from the punch receiving hole 3d of the support fitting 3 and the notch N of the metal pipe SP (see FIGS. 3 and 4).

[0062] Furthermore, by operating the controller 5, the cylinder 72 constituting the push-out mechanism 17 slides the intermediate plate 73 and the multiple push rods 74, 75, 76, 77 fixed to the intermediate plate 73 forward via the shaft 72a of the cylinder 72 relative to the bracket 71 and the housing 2. As the multiple push rods 74, 75, 76, 77 slide forward relative to the bracket 71 and the housing 2, the multiple push rods 74, 75, 76, 77 abut against the metal pipe SP supported by the support bracket 3, and continue to slide forward, pushing the metal pipe SP out of the support bracket 3.

[0063] As described above, the punching apparatus 1 is an apparatus for forming a plurality of holes H (see Figs. 3 and 4) or notches N (see Figs. 3 and 4) in a metal pipe SP. This punching apparatus 1 is equipped with a cylindrical supporting fixture 3 that is fitted with the metal pipe SP and supports the metal pipe SP from the inside, a plurality of punches 6, 7, 8, 9 that punch out the metal pipe SP supported by the supporting fixture 3, and an extrusion mechanism 17 that extrudes the metal pipe SP supported by the supporting fixture 3 from the supporting fixture 3.

[0064] The punching device 1 also includes a plurality of punches 6, 7, 8, 9, each of which includes two pairs of punches 6, 7 and 8, 9 whose tips face each other.

[0065] In addition, in the punching processing apparatus 1, the two pairs of punches 6, 7 and 8, 9 are arranged so that a first direction D1 in which the punches 6, 7 of one set punch the metal tube SP and a second direction D2 opposite to the first direction D1 are perpendicular to a third direction D3 in which the punches 8, 9 of the other set punch the metal tube SP and a fourth direction D4 opposite to the third direction D3.

[0066] The punching processing device 1 also includes a housing 2 to which the support bracket 3 is fixed, a frame body 4 to which one of the paired punches 6, 7 of one set (punch 6) is fixed and which is slidable in a first direction D1 and a second direction D2 relative to the housing 2 together with the one of the paired punches 6, 7 of the one set (punch 6), a biasing means 5 which limits the sliding movement of the frame body 4 with a force, a first extension mechanism 14 which is fixed to the frame body 4 and extends the other of the paired punches 6, 7 of the one set (punch 7) in the first direction D1 and contracts it in the second direction D2 relative to the frame body 4, and a stopper 11 which is fixed to the other of the paired punches 6, 7 of the one set (punch 7) and which abuts against the metal pipe SP after the other of the paired punches 6, 7 of the one set (punch 7) extends in the first direction D1 and punches out the metal pipe SP. In this punching processing device 1, after the stopper 11 hits the metal tube SP, the other of the pair of punches 6, 7 (punch 7) of one set extends in the first direction D1, causing the frame body 4 to slide in the second direction D2 together with the first extension mechanism 14 against the force of the biasing means 5, and one of the pair of punches 6, 7 (punch 6) of one set punches through the metal tube SP.

[0067] The punching processing device 1 also includes a second extension mechanism 15 that is fixed to the housing 2 and extends one of the punches 8, 9 of the other pair (punch 8) in the third direction D3 relative to the housing 2 and contracts it to a fourth direction D4, and a third extension mechanism 16 that is fixed to the housing 2 and extends the other of the punches 8, 9 of the other pair (punch 9) in the fourth direction D4 relative to the housing 2 and contracts it to the third direction D3.

[0068] According to the punching device 1 according to the embodiment of the present invention, even if burrs are generated on the metal pipe SP, the processed metal pipe SP can be removed.

[0069] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit and technical concept of the present invention. In other words, the position, size, length, number, shape, material, etc. of each component may be appropriately changed.

[0070] For example, in the above embodiment, the push-out mechanism 17 is provided with a cylinder 72, and the metal tube SP is removed by the force of the cylinder 72. However, the present invention is not limited to this, and the push-out mechanism 17 may not include the bracket 71 and the cylinder 72, and the intermediate plate 73 may be struck with a hammer. [Explanation of symbols]

[0071] 1 Punching equipment 2. Chassis 21 Bottom plate 21a, 21b, 21c Through holes 22 Tabletop 22a, 22b, 22c Through holes 23 Side Panel 23a Through hole 24 Side Panel 24a Through hole 25 Back plate 25a, 25b, 25c, 25d through holes 3 Support bracket 3a, 3b, 3c, 3d Punch holes 4 Frame 41 Upper Plate 41a Through hole 42 Lower plate 43,44 Connecting rod 5. Actuating means 51,52 Coil spring 6,7,8,9 Punch 10,11,12,13 Stopper 14 1st telescopic mechanism 15 Second telescoping mechanism 16 Third telescopic mechanism 17 Extrusion mechanism 71 Bracket 71a Through hole 72 cylinders 72a axis 73 Intermediate plate 74, 75, 76, 77 Push rod 18 Controller SP metal tube H hole N Notch D1 1st direction D2 2nd direction D3 3rd direction D4 4th direction

Claims

1. A punching processing device for forming a plurality of holes or notches in a metal pipe, a cylindrical support fitting that is covered with the metal pipe and supports the metal pipe from the inside; A plurality of punches for punching out the metal tube supported by the support fitting; and a push-out mechanism for pushing out the metal pipe supported by the support bracket from the support bracket. Punching processing equipment.

2. The plurality of punches are characterized in that two pairs of punches each having a tip facing each other are provided. The punching device according to claim 1.

3. The two sets of paired punches are arranged such that a first direction in which the paired punches of one set punch the metal tube and a second direction opposite to the first direction are perpendicular to a third direction in which the paired punches of the other set punch the metal tube and a fourth direction opposite to the third direction. The punching device according to claim 2.

4. A housing to which the support bracket is fixed; a frame to which one of the pair of punches of the one set is fixed and which is slidable in the first direction and the second direction relative to the housing together with the one of the pair of punches of the one set; a biasing means for restricting the sliding movement of the frame body by force; a first extension / contraction mechanism fixed to the frame and configured to extend the other of the pair of punches in the first direction and contract the other of the pair of punches in the second direction relative to the frame; a stopper that is fixed to the other of the pair of punches of the one set and that abuts against the metal tube after the other of the pair of punches of the one set extends in the first direction to punch out the metal tube, After the stopper hits the metal tube, the other of the pair of punches of the one set extends in the first direction, so that the frame body slides in the second direction together with the first extension mechanism against the force of the biasing means, and one of the pair of punches of the one set punches out the metal tube. The punching device according to claim 3.

5. a second extension mechanism fixed to the housing and configured to extend one of the pair of punches of the other set in the third direction and contract the other set in the fourth direction relative to the housing; a third extension mechanism fixed to the housing and configured to extend the other of the pair of punches of the other set in the fourth direction and contract the other of the pair of punches in the third direction relative to the housing. The punching device according to claim 4.

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