Spring machines for staple processing

Abstract

The present invention relates to a spring machine for processing suture nails, comprising a core rod, a work surface, a knife holder assembly, a folding knife and a punching knife. The side of the core rod also has a punching hole passing through the wire feeding hole. The punching hole penetrates the core rod from top to bottom. The punching knife is inserted from the upper opening of the punching hole and is used to punch the wire passing through the punching hole. The punching knife is used for punching through the punching hole for guiding. The punching tool has two side surfaces that are arranged front and back relative to the axis of the wire feeding hole and are inclined. The two side surfaces are the knife faces of the punching knife. The two knife faces of the punching knife are in contact with the side wall of the punching hole and are used to cut the wire and form an inclined cross section. The knife holder assembly matched with the punching knife drives the punching knife to descend for punching, and the punching knife rises and resets under the action of a spring. The beneficial effects of the present invention are: no shear burrs are generated, the dimensional stability is also high, and the processing efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of suture nail processing equipment, in particular to a spring machine used for suture nail processing. Background Art

[0002] The surgical staples 12 are a new method for suturing surgical incisions instead of sutures. The staples 12 are stapled to the skin incisions with a special stapler to align the skin edges and promote wound growth and healing.

[0003] The suture nail 12 includes a nail rod 12-1 and nail feet 12-2 on both sides of the nail rod 12-1. The ends of the nail feet 12-2 are inclined to form sharp nail feet 12-2 to ensure the penetration of tissues. The angle A between the inclined surface at the end of the nail foot 12-2 and the nail foot 12-2 is generally about 30 to 45 degrees. The inclined surface at the end of the nail foot 12-2 needs to face outward, such as Figure 1 shown.

[0004] Now the suture nail 12 can be formed by a spring machine, also known as a wire forming machine. In the prior art, the spring machine used for processing the suture nail 12 includes a core rod 1, a work surface 2 perpendicular to the core rod 1, a knife frame assembly 3 outside the core rod 1, and a folding knife 4 and a shearing knife 13 installed on the knife frame assembly 3. The core rod 1 has a wire feeding hole 5, the core rod 1 is exposed from the work surface 2, and the knife frame assembly 3 drives the folding knife 4 and the shearing knife 13 to reciprocate on the work surface 2. Figure 2 shown.

[0005] The forming process is as follows: the wire material 7 used to make the suture nail 12 is fed out through the wire feeding hole 5 of the mandrel 1. Each time a section of the wire material 7 is fed out, the knife holder assembly 3 drives the angle-folding knife 4 to perform an angle-folding action. After two wire feeding and angle-folding actions, the forming process of the suture nail 12 is completed. The wire material 7 is fed out again for a section of the length of the nail foot 12-2, and then a pair of two shearing knives 13 are actuated to cut the formed suture nail 12 and the subsequent wire material 7. The blade surfaces 8 of the two paired shearing knives 13 are inclined, such as Figures 3 to 8 As shown, the bevel of the end of the nail leg 12-2 is cut out while the wire 7 is cut.

[0006] Because the inclined surfaces of the two nail feet 12-2 of the suture nail 12 have different inclination directions, and the inclination direction of the blade surface 8 of a set of shearing knives 13 is fixed, the existing spring machine must be equipped with two sets of shearing knives 13 with different inclination directions of the blade surface 8. At the same time, in order to avoid the waste of wire 7, two angle knives 4 with different angle directions need to be provided. Figures 3 to 8 In the embodiment, a folding knife 4 above the mandrel 1 forms a suture nail 12 by two downward folding actions, and then a shearing knife 13 matched with the folding knife 4 above acts to cut the wire 7, and the formed suture nail 12 falls into the receiving box below; Figures 9 to 14 As shown, the core rod 1 then continues to feed out the wire 7 to form the next suture staple 12. Because the inclined surface of the head end of the wire 7 is currently facing downward, the folding knife 4 below needs to move upward to form the suture staple 12, and the wire 7 is cut by a shear knife 13 with a set of blade surfaces 8 having different inclined directions below to complete the processing of the suture staple 12.

[0007] The technical problems of the prior art are: the structure is complex, and the two angle knives with different directions and two groups of four shear knives need to be controlled to coordinate their actions to complete the processing of the suture nail, which increases the difficulty of debugging and control. At the same time, in order to reduce the failure rate, the speed of the spring machine cannot be too fast, which affects the processing efficiency;

[0008] In addition, the two shear knives are used as a set of shearing methods for shearing wire. Because the cutting edge of the shear knife is far away from the fixed point of the shear knife and has no support, the shear force will cause the two shear knives to give in to each other and deform. After a long processing time, shear burrs will occur and dimensional stability will deteriorate. Summary of the invention

[0009] The technical problem to be solved by the present invention is that the existing spring machine has a complex structure, is prone to shear burrs, and has poor dimensional stability.

[0010] The technical solution adopted by the present invention to solve its technical problems is: a spring machine for processing suture nails, comprising a core rod, a work table, a knife holder assembly and a folding knife outside the core rod, the knife holder assembly and the folding knife are located on the work table perpendicular to the core rod, the core rod is provided with a wire feeding hole, and the folding knife is installed on the knife holder assembly matched with it. The spring machine also includes a punching knife, the side of the core rod is also provided with a punching hole passing through the wire feeding hole, the punching hole penetrates the core rod from top to bottom, the punching knife is inserted from the upper opening of the punching hole, and is used to punch the wire passing through the punching hole, the punching knife is used for punching guide through the punching hole, the punching tool has two side surfaces arranged front and rear relative to the axis of the wire feeding hole and inclined, the two side surfaces are the knife faces of the punching knife, the two knife faces of the punching knife are in contact with and cooperate with the side walls of the punching hole, and are used to cut the wire and form an inclined cross-section, and the knife holder assembly matched with the punching knife drives the punching knife to descend for punching.

[0011] It is further defined that the tool holder assembly is in contact with the punching knife and is used to drive the punching knife to punch, and the punching knife rises and resets under the action of a spring. Compared with a driving scheme in which the punching knife is directly installed on the tool holder assembly and the punching knife is directly driven by the tool holder assembly to rise and fall to complete punching and reset after punching, the further defined driving scheme does not need to ensure that the installation axis on the tool holder assembly and the punching knife axis are completely coincident, which can greatly reduce the difficulty of installation and debugging of the punching knife.

[0012] It is further defined that the punching knife has a punch structure on the knife body exposed from the core rod, the knife holder assembly is in contact with and cooperates with the punch structure of the punching knife, and the spring is sleeved on the punching knife and located between the punch structure and the core rod.

[0013] It is further defined that the spring machine also includes a supporting knife, the head end of the supporting knife has a supporting surface, the supporting knife is installed on a matching knife holder assembly, and is driven by the matching knife holder assembly to lean against the core rod to support the wire to be folded.

[0014] It is further specified that the punching cutter is a hexagonal prism.

[0015] It is further defined that the punching knife is arranged vertically, the folding knife is installed on a horizontally arranged knife holder assembly, the supporting knife and the folding knife are respectively located on the left and right sides of the core rod, and the supporting knife is installed on a knife holder assembly arranged obliquely upward at the lower half of the core rod.

[0016] It is further defined that the supporting surface is a plane parallel to the reciprocating action plane of the bending knife for bending the wire.

[0017] The beneficial effect of the present invention is that due to the guiding effect of the punching hole, when the punching knife on the core rod punches the wire, the punching knife is radially limited. Compared with the prior art in which two shearing knives are used as a group for shearing, there is no tendency for mutual retreat and deformation, and no shearing burrs will be generated during long-term processing, and the dimensional stability is also high.

[0018] At the same time, one punching can form two sections with different inclination directions, and the forming process of the front and rear suture nails can be completed by a folding knife in one direction, which simplifies the structure, reduces the difficulty of debugging and control, and the speed of the spring machine can be adjusted faster, with high processing efficiency.

[0019] In addition, the added supporting knife can support the wire being formed to prevent the wire from bending due to gravity, especially when the nail rod part is long, the supporting effect can prevent the nail rod part from bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0021] Figure 1 It is a schematic diagram of the structure of the suture staple of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of a spring machine used for processing suture staples in a front view;

[0023] Figure 3 It is a schematic diagram of the principle of the side view state of the processing step 1 of the existing spring machine processing suture nail;

[0024] Figure 4It is a schematic diagram of the principle of the side view of the processing step 2 of the existing spring machine processing suture nail;

[0025] Figure 5 It is a schematic diagram of the principle of side view of processing step 3 of the suture nail of the existing spring machine;

[0026] Figure 6 It is a schematic diagram of the principle of the side view of the processing step 4 of the existing spring machine processing suture nail;

[0027] Figure 7 It is a schematic diagram of the principle of a side view of a processing step 5 of a suture nail processing of an existing spring machine;

[0028] Figure 8 It is a schematic diagram of the principle of a side view of a processing step 6 of a suture nail processing of an existing spring machine;

[0029] Fig. 9 It is a schematic diagram of the principle of a side view of a processing step 7 of a suture nail processing of an existing spring machine;

[0030] Fig.10 It is a schematic diagram of the principle of a side view of the processing step 8 of a suture nail in a conventional spring machine;

[0031] Fig.11 It is a schematic diagram of the principle of a side view of a processing step 9 of a suture nail processing of an existing spring machine;

[0032] Fig.12 It is a schematic diagram of the principle of a side view of a processing step 10 of a suture nail in a conventional spring machine;

[0033] Fig.13 It is a schematic diagram of the principle of a side view of a processing step 11 of a suture nail processing of an existing spring machine;

[0034] Fig.14 It is a schematic diagram of the principle of a side view of a processing step 12 of a suture nail processing of an existing spring machine;

[0035] Fig.15 It is a front view structural schematic diagram of a spring machine for processing suture staples of the present invention;

[0036] Fig.16 It is a schematic diagram of the assembly structure of the punching knife and the mandrel in a front view of the present invention;

[0037] Fig.17 It is a schematic diagram of the assembly structure of the punching cutter and the core rod of the present invention in a top view;

[0038] Fig.18 It is a schematic diagram of the principle of a top view of step 1 of processing a suture nail by a spring machine according to the present invention;

[0039] Fig.19It is a schematic diagram of the principle of a top view of the processing step 2 of a suture nail processed by a spring machine of the present invention;

[0040] Fig. 20 It is a schematic diagram of the principle of a top view of the processing step 3 of a suture nail processing of a spring machine according to the present invention;

[0041] Fig.21 It is a schematic diagram of the principle of a top view of the processing step 4 of a suture nail processing of a spring machine according to the present invention;

[0042] Fig. 22 It is a schematic diagram of the principle of a top view of a processing step 5 of a spring machine suture staple of the present invention;

[0043] Fig.23 It is a schematic diagram of the principle of a top view of the processing step 6 of a suture nail processing of a spring machine according to the present invention;

[0044] In the figure, 1. core rod, 2. work table, 3. tool holder assembly, 4. angle knife, 5. wire feeding hole, 6. punching knife, 7. wire, 8. knife surface, 9. spring, 10. punch structure, 10-1. fixing screw, 11. holding knife, 11-1. holding surface, 12. suture nail, 12-1. nail rod, 12-2. nail foot, 13. shearing knife. DETAILED DESCRIPTION

[0045] like Figures 15 to 23 As shown, a spring machine for processing suture staples includes a core rod 1, a work surface 2, a tool holder assembly 3 and a folding knife 4 outside the core rod 1, the tool holder assembly 3 and the folding knife 4 are located on the work surface 2 which is perpendicular to the core rod 1, a wire feeding hole 5 is provided in the core rod 1, and the folding knife 4 is installed on the tool holder assembly 3 matched therewith.

[0046] The spring machine also includes a punching knife 6 and a holding knife 11. The side of the core rod 1 also has a punching hole passing through the wire feeding hole 5. The punching hole passes through the core rod 1 from top to bottom. The punching knife 6 is inserted from the upper opening of the punching hole to punch the wire 7 passing through the punching hole. The punching knife 6 is guided by the punching hole. The punching knife 6 has two side surfaces that are arranged front and back relative to the axis of the wire feeding hole 5 and are inclined. These two side surfaces are the knife surfaces 8 of the punching knife 6. The two knife surfaces 8 of the punching knife 6 are in contact with the side walls of the punching hole to cut the wire 7 and form an inclined cross-section. The knife holder assembly 3 matched with the punching knife 6 drives the punching knife 6 to descend for punching, and the punching knife 6 rises and resets under the action of the spring 9.

[0047] The punching knife 6 has a punch structure 10 on the knife body exposed from the core rod 1, the spring 9 is sleeved on the punching knife 6 and is located between the punch structure 10 and the core rod 1, and the knife holder assembly 3 is in contact with the punch structure 10 to drive the punching knife 6 to perform punching. In this embodiment, the punch structure 10 is specifically a punch block, which has a through hole, and the punch block is sleeved on the punching knife 6 through the through hole. The side of the punch block has a screw hole, and the screw hole has a fixing screw 10-1, which presses against the side of the punching knife 6 to fix the punch block and the punching knife 6 together.

[0048] The head end of the supporting knife 11 has a supporting surface 11-1, which is a plane parallel to the reciprocating action plane of the bending wire 7 of the folding knife 4. The supporting knife 11 is installed on the matching knife holder assembly 3 and is driven by the matching knife holder assembly 3 to lean against the core rod 1 for supporting the wire 7 to be folded.

[0049] The punching blade 6 is a hexagonal prism.

[0050] The punching knife 6 is arranged vertically, the folding knife 4 is installed on the horizontally arranged knife holder assembly 3, the supporting knife 11 and the folding knife 4 are respectively located on the left and right sides of the core rod 1, the folding knife 4 and its knife holder assembly 3 are located on one side of the core rod 1, and the supporting knife 11 is installed on the knife holder assembly 3 which is arranged obliquely upward in the lower half of the other side of the core rod 1.

[0051] The processing process of the spring machine used for suture nail processing is as follows:

[0052] 1) If Fig.18 As shown, the wire material 7 used to make the suture nail 12 is fed out through the wire feeding hole 5 of the mandrel 1;

[0053] 2) If Fig.19 As shown, after the wire material 7 of the length of the nail foot 12-2 is delivered, the knife holder assembly 3 drives the angle-folding knife 4 to perform an angle-folding action, thereby completing the forming of the nail foot 12-2 on one side;

[0054] 3) If Fig. 20 As shown, the wire 7 continues to be fed out, and the knife holder assembly 3 drives the holding knife 11 to rise obliquely upward, so that the holding surface 11-1 of the holding knife 11 holds the wire 7, and the holding portion is located in front of the angled knife 4;

[0055] 4) If Fig.21 As shown, after the wire 7 of the length of the nail rod 12-1 is delivered, the tool holder assembly 3 drives the angle-folding knife 4 to perform a second angle-folding action to complete the forming of the nail rod 12-1, and the tool holder assembly 3 drives the holding knife 11 to reset obliquely downward;

[0056] 5) If Fig. 22As shown, the tool holder assembly 3 drives the punching knife 6 to descend and perform punching. One punching can form two sections with different inclined directions. The tool holder assembly 3 rises and resets, and the punching knife 6 rises and resets under the action of the spring 9;

[0057] 6) If Fig.23 As shown, the wire material 7 continues to be fed out, and the nail foot 12-2 of the suture nail 12 that has completed the molding process is pushed out of the wire feeding hole 5 of the mandrel 1, and the suture nail 12 falls into the receiving box below.

Claims

1. A spring machine for processing suture staples, comprising a mandrel (1), a work surface (2), a knife holder assembly (3) and a folding knife (4) on the periphery of the mandrel (1), the knife holder assembly (3) and the folding knife (4) being located on the work surface (2) perpendicular to the mandrel (1), the mandrel (1) having a wire feeding hole (5), and the folding knife (4) being mounted on the knife holder assembly (3) matched therewith, wherein: The invention also comprises a punching knife (6). The side of the core rod (1) also has a punching hole passing through the wire feeding hole (5). The punching hole passes through the core rod (1) from top to bottom. The punching knife (6) is inserted from the upper opening of the punching hole and is used to punch the wire (7) passing through the punching hole. The punching knife (6) is guided through the punching hole for punching. The punching knife (6) has two side surfaces arranged front and back relative to the axis of the wire feeding hole (5) and inclined. The two side surfaces are the blade surfaces (8) of the punching knife (6). The two blade surfaces (8) of the punching knife (6) are in contact with the side wall of the punching hole and are used to cut the wire (7) and form an inclined cross section. The blade holder assembly (3) matched with the punching knife (6) drives the punching knife (6) to descend for punching.

2. The spring machine for staple processing according to claim 1, characterized in that: The knife holder assembly (3) is in contact with the punching knife (6) and is used to drive the punching knife (6) to perform punching. The punching knife (6) rises and resets under the action of the spring (9).

3. The spring machine for staple processing according to claim 2, characterized in that: The punching knife (6) has a punch structure (10) on the knife body exposed from the core rod (1), the knife holder assembly (3) is in contact with the punch structure (10) of the punching knife (6), and the spring (9) is sleeved on the punching knife (6) and is located between the punch structure (10) and the core rod (1).

4. The spring machine for staple processing according to claim 1, characterized in that: It also includes a holding knife (11), the head end of which has a holding surface (11-1). The holding knife (11) is mounted on a matching knife holder assembly (3) and is driven by the matching knife holder assembly (3) to lean against the mandrel (1) to hold the wire (7) to be bent.

5. The spring machine for staple processing according to claim 1, characterized in that: The punching knife (6) is a hexagonal prism.

6. The spring machine for processing suture staples according to claim 4, characterized in that: The punching knife (6) is arranged vertically, the folding knife (4) is mounted on a horizontally arranged knife holder assembly (3), the supporting knife (11) and the folding knife (4) are respectively located on the left and right sides of the core rod (1), and the supporting knife (11) is mounted on a knife holder assembly (3) arranged obliquely upward at the lower half of the core rod (1).

7. The spring machine for staple processing according to claim 4, characterized in that: The supporting surface (11-1) is a plane parallel to the reciprocating action plane of the bending wire (7) of the angle bending knife (4).

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