WO1996038105A1

WO1996038105A1 - Cutting device

Info

Publication number: WO1996038105A1
Application number: PCT/DE1996/000959
Authority: WO
Inventors: Gerhard Arnold; Paul Keiter
Original assignee: Gerhard Arnold; Paul Keiter
Priority date: 1995-06-02
Filing date: 1996-05-31
Publication date: 1996-12-05
Also published as: AU6187096A

Abstract

The invention concerns a cutting device (1) for producing a circular opening in a base plate (8) for a stoma, a blade (6) being secured to an upper part (2) of the device. The base plate (8) lies on a base (3) and, like the upper part (2), is centred by a centring mandrel (10). When the upper part (2) is rotated relative to the base (3), the blade (6) cuts the opening in the base plate (8). The blade (6) is mounted so as to be radially displaceable on the upper part (2).

Description

description

Cutting device

The invention relates to a cutting device with a cutting tool for creating a circular opening in a base plate for a stoma.

Such a base plate either serves to fasten a pouch to the abdominal wall of a person with a stoma or it is part of such a pouch. In both cases, it is held on the abdominal wall by adhesive. The base plate is usually industrially prefabricated with a small opening and must be replaced every third day. Since the diameter of the stoma differs in the individual people, the person loaded with the stoma must widen the opening in the base plate according to the size of his stoma. Since the material of the base plate is very soft, nail scissors are sufficient for this as a cutting tool. curved cutting. However, great care is required when cutting in order to produce the opening as circularly as possible. Furthermore, several circles along which the user cuts must be printed on the base plate, or the user must mark the opening on the base plate before cutting. Creating the required opening is particularly difficult for older or less adept people.

Cutting tools in the manner of a punch iron are also known, with which the opening is punched into the base plate. However, handling such a punch also requires greater skill. O 96/38105 PCΪ7DE96 / 00959

2 ability and a lot of effort. Both are particularly difficult for older people. Furthermore, with such a punch, it is very difficult to center the opening in the base plate. Poor centering is disadvantageous in particular for people with a particularly large stoma, since the base plate for fastening the bag generally has a locking ring to which the opening should have a safety distance of at least 5 mm for reasons of skin protection.

The invention is based on the problem of designing a cutting device of the type mentioned at the outset in such a way that it can be used to produce the circular opening in the intended position in the base plate in a particularly simple manner and without great effort.

This problem is solved according to the invention in that the cutting tool is fastened on an upper part which is axially displaceable and rotatable relative to a base plate and in the rest position rests with one end or with a region of its cutting edge on the base plate and in that the base plate has a centering for the base plate and the top has.

This design of the cutting device first centers the base plate on the base plate. The upper part is then placed on the base plate and also centered. The cutting tool hereby reaches the base plate with its cutting edge and cuts the circular opening into the base plate when the upper part is rotated relative to the base plate. Since the base plate is made of a very soft material, only small cutting forces occur during cutting, so that the base plate is held in place without an additional clamping device during the cutting process can. As a result, the opening can be produced in the base plate with a particularly low expenditure of force.

If, as is customary, the base plate has a central opening before the cutting device is used, then this and the upper part can be centered very easily on the base plate according to an advantageous development of the invention if the base plate has the same diameter as the opening in the base plate has a corresponding centering mandrel in diameter and if the upper part has an appropriately designed opening in its center.

According to another advantageous development of the invention, the cutting tool can be produced particularly cost-effectively if it is designed as a knife protruding in the direction of the base plate.

The very soft material of the base plate can tear if the knife is pulled too quickly. A tearing of the base plate during the cutting process can be prevented simply by the cutting tool being designed as a cutting wheel. The base plate is cut perfectly by rolling the cutting wheel. The use of such a cutting wheel as a cutting tool also has the advantage that the edge of the opening created is rounded off when the cutting wheel is unrolled, because during cutting the rear edge presses the material outwards.

For different diameters of the openings one could use different top parts, each made for one diameter. However, since the diameter of the stoma differs in different people and changes over time, many different top parts would have to be supplied for the cutting device. the. The cutting device consists of very few individual parts if, according to a development of the invention, the upper part is designed for fastening the cutting tool in several radially different positions. As a result, openings with different diameters can be created with a single upper part.

Before the cutting tool is set to the opening to be created, the stoma must be measured. According to an advantageous further development of the invention, this can be done particularly easily if a transparent film with several printed markings is provided for determining the diameter of the stoma. This film is placed on the stoma by the user. Due to the printed diameter, the film can be centered very easily. The diameter of the stoma can then be easily read from the outside. As a result, the opening is given the correct diameter for the respective stoma in a particularly simple manner. Such a film is also suitable for other cutting devices for measuring the stoma.

The load on the material of the base plate during the cutting process is particularly low if several cutting tools, each at the same distance from the centering, are arranged on the upper part. Due to the low material load during the cutting process, the risk of tearing is kept as low as possible.

The possibility of adjusting the cutting tool or the cutting tools can be realized with particularly little effort if the cutting tools are each provided on a sliding block which is held in a radial guide groove which in each case runs towards the center of the upper part. The slot nuts can be fixed with simple means in that they can be locked in the respective guide groove by means of a clamping screw.

According to an advantageous development of the invention, all cutting tools can be adjusted and fixed on the upper part at the same time and in a particularly simple manner if a threaded washer is rotatably mounted in the upper part and has a flat thread into which the sliding blocks of all Intervene with cutting tools. Due to the self-locking of the face thread, additional means for fastening the cutting tools in their intended position are no longer required. The cutting tools can thus be infinitely adjusted to the desired diameter of the opening simply by turning the threaded washer and are simultaneously fixed in their respective positions.

Falling out of the sliding blocks outward from the radial guide grooves when adjusting the cutting tools can be avoided in a very simple manner if a locking ring engages over the threaded washer and the outer surface of the guide washer.

According to an advantageous further development of the invention, the safety distance between the opening and the locking ring in the base plate can be maintained simply by holding the cutting wheels in bearing arms which have the width of a safety distance between the opening to be generated and a locking ring of the base plate .

If the cutting device is not used, it is advantageous that the cutting tools cannot scrape around on the base plate. This scraping is done according to an advantageous development of the invention simply avoided by incorporating corresponding recesses for the cutting tools in the lower part. These recesses are able to accommodate the cutting tools.

The cutting tools do not touch the base plate at the end of the cutting operation if, according to another advantageous development of the invention, a plurality of circular grooves with the diameters of the openings to be produced are incorporated in the base plate. This results in a particularly clean cutting edge and a particularly long service life of the cutting tools.

The base plate is often inseparably connected to the bag. Then, when cutting the opening in the base plate, care must be taken that the bag is not damaged in the process. A cutting of the bag is reliably prevented if, according to another development of the invention, the base plate has a 360 ° ring disk as a support for the upper part, which is connected to the centering mandrel by means of a spoke and provided there with a separating joint and for insertion into the central opening of the base plate is narrower than the diameter of the central opening. With this design, the base plate with its ring disk can be threaded through the small-diameter opening that is always present in the base plate into the bag between the base plate and the wall of the bag, so that no damage to the bag is possible during cutting.

The ring disk can be inserted particularly easily into the central opening of the base plate if, according to another advantageous development of the invention, the joint of the ring disk between one and the spoke directed tip and an opposite, correspondingly shaped recess runs.

According to another advantageous development of the invention, the tip of the material strip can be inserted particularly easily into the central opening of the base plate if the annular disc is made of a flexible material and is evenly bent away from the cutting plane over its length in the axial direction of the centering mandrel ¬ gen.

To further simplify the insertion of the ring disk into the central opening, it is helpful if, according to another advantageous development of the invention, the ring disk has a hinge for pivoting the tip in the axial direction of the centering mandrel away from the cutting plane.

According to another advantageous development of the invention, the hinge is structurally particularly simple if the hinge has an axis about which the tip can be pivoted.

According to another advantageous development of the invention, the annular disc can be manufactured particularly easily if the hinge is a film hinge. The base plate can thus, for example, be produced entirely from a plastic in an injection molding process.

The hinge always holds the tip in a position that is particularly easy to insert if, according to another advantageous development of the invention, the hinge has a stop that limits the pivoting range of the tip to approximately 15 °. The invention allows numerous embodiments. To further clarify its basic principle, several of them are shown in the drawing and are described below. This shows in

1 shows a longitudinal section through a cutting device according to the invention,

2 shows a view from below of an upper part of a second embodiment of the cutting device,

3 shows a sectional view through the upper part from FIG. 2 along the line III-III,

4 shows a sectional view through the upper part from FIG. 2 along the line IV-IV,

5 shows a view from above of a second embodiment of a base plate,

6 shows a sectional view through the base plate from FIG. 5 along the line VI-VI with a bag attached to a base plate,

7 shows a view from above of a partial area of the base plate,

8 shows a sectional view through the base plate from FIG. 7 along the line VIII-VIII,

9 shows a view from above of a further embodiment of the base plate,

10 shows a sectional view through the base plate from FIG. 9 along the line X - X _# FIG. 1 shows a cutting device 1 which is put together from an upper part 2 and a base plate 3. The upper part 2 has a guide groove 4, in which a sliding block 5 is slidably fastened with a knife 6. The sliding block 5 is clamped with a screw 7 in any position in the guide groove 4. On the base plate 3 there is a base plate 8 to be cut. The base plate 8 has in its radially outer region a circumferential locking ring 9, to which a bag (not shown) can be attached, for example. For centering the base plate 8 and the upper part 2, the base plate 3 has a centering mandrel 10 which extends through a correspondingly dimensioned opening 11, 12 of the base plate 8 and the upper part 2. In the base plate 3, several circular grooves 13-15 are machined, into which the knife 6 can penetrate during the cutting process. As a result, the knife 6 cuts the base plate 8 with a central region of its cutting edge 16.

A view of an upper part 17 from below with three adjustable cutting wheels 18-20 is shown in FIG. This upper part 17 is plugged onto the base plate 3 shown in FIG. 1 instead of the upper part 2 from FIG. The upper part 17 has a guide disk 21 with three guide grooves 22-24, in each of which a sliding block 25-27 is slidably held. The sliding blocks 25 ^' - 27 each have two bearing arms 28, 29, in which the cutting wheels 18 - 20 are rotatably mounted. The radially outer bearing arms 28 have the width of a safety distance which must remain between the opening to be cut in the base plate 8 and the locking ring 9 shown in FIG. 1. Behind the guide washer 21 ^* , a threaded washer 30 with a spiral flat thread 31 is rotatably arranged. In the drawing the area of the face thread 31 covered by the guide disk 21 is shown in dash-dot lines for clarification.

FIG. 3 clearly shows the arrangement of one of the sliding blocks 25 in the guide disk 21 in a sectional illustration along the line III-III from FIG. 2. The sliding block 25 has on its rear side a threaded section 32 which is in line with the flat thread 31 of the threaded disk 30 in Intervention stands. The threaded washer 30 has a handle 33 on its side facing away from the face thread 31. By simply turning the threaded washer 30 by means of the handle 33, the sliding block 25 is displaced in the guide groove 22 of the guide washer 21. The threaded washer 30 is held between the guide washer 21 and a locking ring 34. The locking ring 34 also serves as a stop for the sliding block 25.

The sectional illustration shown in FIG. 4 of an area of the upper part 17 from FIG. 2 along the line IV-IV illustrates the guidance of the sliding block 25 in the guide disk 21. The sliding groove 22 is designed like the sliding block 25 in a step-shaped manner. This design enables large tolerances between the sliding block 25 and the guide groove 22 and thus an easy displacement of the sliding block 25.

FIGS. 5 and 6 show a base plate 35 with an annular disk 36, which is connected to the centering mandrel 10 via a spoke 37 and is separated on one side of the spoke 37 by a separating joint 48. This parting line 48 runs between a tip 38 on one side of the spoke 37 and a correspondingly shaped recess 50 on the opposite side, into which the tip ^* 38 engages. The tip 38 serves for the easy insertion of the ring disk 36 into the opening 11 of one in FIG. 6 shown base plate 40. In Figure 6, a bag 39 is also shown, which is firmly connected to the base plate 40. The annular disk 36 is bent downward uniformly over its entire length in the axial direction of the centering mandrel 10. The knives 6 and cutting wheels 18-20 shown in FIGS. 1 to 3 thus cut on the ring disk 36 without damaging the bag 39.

FIGS. 7 and 8 show a tip 43 fastened to a flat annular disk 40 by means of a film hinge 42. The tip 43 can be pivoted downward by this film hinge 42 for easier insertion into the central opening 11 of the base plate 40 shown in FIG.

FIGS. 9 and 10 show an annular disk 44, which is connected by means of a hinge 49 with an axis 45 to a tip 46. The tip 46 can thus be pivoted downward like the tip 43 shown in FIGS. 7 and 8 for easier insertion into the opening 11 of the base plate 40 shown in FIG. Furthermore, the tip 46 has a stop 47 which limits its swivel range.

The annular disc 36, 41 or 44 may have a maximum width corresponding to the diameter of the opening 11 in the base plate 8, 40; otherwise it could not be inserted into opening 11. The range in which the opening can be expanded with the cutting device is therefore limited to this width. However, it is possible to supply base plates 3 with different ring disk diameters for different diameter ranges. Reference list of references

Cutting device 26 sliding block

Upper part 27 sliding block

Base plate 28 bearing arm

Guide groove 29 bearing arm

Sliding block 30 thread washer

Knife 31 flat thread

Clamping screw 32 thread section

Base plate 33 handle

Locking ring 34 locking ring

Centering mandrel 35 base plate

Opening 36 washer

Opening 37 spoke

Groove 38 tip

Groove 39 bags

Groove 40 base plate

Cut 41 washer

Upper part 42 film hinge

Cutting wheel 43 tip

Cutting wheel 44 washer

Cutting wheel 45 axis

Guide disc 46 tip

Guide groove 47 stop

Guide groove 48 parting line

Guide groove 49 hinge

Sliding block 50 recess

Claims

claims

1. Cutting device with a cutting tool for generating a circular opening in a base plate for a stoma, characterized in that the cutting tool (knife 6, cutting wheel 18-20) is axially displaceable and on a base plate (3) rotatable upper part (2, 17) is fixed and in the rest position with one end or with a portion of its cutting edge (16) against the base plate (3) and that the base plate (3) has a centering (centering mandrel 10) for the base plate (8) and the upper part (2, 17).

2. Cutting device according to claim 1, in which the base plate has a central opening before use of the cutting device, which opening can be expanded in diameter with the cutting device, characterized in that the base plate (3) has a has the centering mandrel (10) corresponding to the diameter of the opening in the base plate and that the upper part (2, 17) has a correspondingly designed opening (12) in its center.

3. Cutting device according to claim 1, characterized gekenn¬ characterized in that the cutting tool is designed as a protruding in the direction of the base plate (3) knife (6).

4. Cutting device according to claim 1, characterized gekenn¬ characterized in that the cutting tool is designed as a cutting wheel (18-20).

5. Cutting device according to at least one of the preceding claims, characterized in that the upper part (2, 17) for fastening the cutting tool (knife 6 _ß cutting wheel 18 - 20) is formed in several radially different positions.

6. Cutting device according to at least one of the preceding claims, characterized in that a transparent film with a plurality of printed markings is provided for determining the diameter of the stoma.

7. Cutting device according to at least one of the preceding claims, characterized in that on the upper part (2, 17) a plurality of cutting tools (knife 6, cutting wheel 18 - each having the same distance from the centering (opening 11, 12)) 20) are arranged.

8. Cutting device according to claim 7, characterized gekenn¬ characterized in that the cutting tools (knife 6, cutting wheel 18 - 20) are each seen on a sliding block (5; 25, 26, 27), which in a radial, each on the Center of the upper part (2, 17) tapering guide groove (4, 22 - 24) is held.

9. Cutting device according to claim 8, characterized gekenn¬ characterized in that the sliding blocks (5) in the respective Füh¬ groove (4) by means of a clamping screw (7) can be determined.

10. Cutting device according to claim 8, characterized gekenn¬ characterized in that in the upper part (2, 17) a threaded washer (30) is rotatably mounted, which has a face thread (31) in which the sliding blocks (25, 26, 27) of all Cutting tools (knife 6, cutting wheel 18-20) engage.

11. Cutting device according to claim 10, characterized gekenn¬ characterized in that a locking ring (34) on the threaded Disc (30) and the outer surface of the guide disc (21) engages.

12. Cutting device according to at least one of the preceding claims, characterized in that the cutting wheels (18 - 20) are held in bearing arms (28, 29) which have the width of a safety distance between the opening to be produced and a locking ring (9 ) of the base plate (8).

13. Cutting device according to at least one of the preceding claims, characterized in that corresponding recesses are incorporated in the base plate (3) for the cutting tools (knife 6, cutting wheel 18-20).

14. Cutting device according to at least one of the preceding claims, characterized in that in the base plate (3) a plurality of circular, circumferential grooves (13 - 15) are incorporated with the diameters of the openings to be produced.

15. Cutting device according to at least one of the preceding claims, characterized in that the base plate (35) has, as a support for the upper part (2), an annular disk (36, 41, 44) which extends over 360 ° and which connected to the centering mandrel (10) by means of a spoke (37) and provided there with a parting line (48) and is narrower than the diameter of the central opening (11) for insertion into the central opening (11) of the base plate (40) .

16. Cutting device according to claim 15, characterized gekenn¬ characterized in that the parting line (48) of the annular disc (36, 41, 44) between a pointed on the spoke (37) Spit- ze (38, 43, 46) and an opposite, correspondingly shaped recess (50).

17. Cutting device according to at least one of the preceding claims, characterized in that the annular disc (36) is made of a flexible material and is uniformly bent away from the cutting plane over its length in the axial direction of the centering mandrel (10).

18. Cutting device according to at least one of the preceding claims, characterized in that the annular disc (41, 44) has a hinge (film hinge 42, 49) for pivoting the tip (43, 46) in the axial direction of the centering mandrel (10) from the Cutting plane has gone.

19. Cutting device according to claim 18, characterized gekenn¬ characterized in that the hinge (49) has an axis (45) about which the tip (46) is pivotable.

20. Cutting device according to claim 18, characterized gekenn¬ characterized in that the hinge is a film hinge (42).

21. Cutting device according to claim 18, characterized gekenn¬ characterized in that the hinge (49) has a pivoting range of the tip (46) to approximately 15 ° limiting stop (47).