DE29706182U1 - Profile cutting tool for cutting thin-walled sheet metal profiles - Google Patents

Description

Description Profile cutting tool for cutting thin-walled sheet metal profiles

The purpose of the utility model is to create a tool for cutting thin-walled sheet metal profiles, in particular for the "drywall" trade for use primarily on construction sites, which is easy to handle, can be easily transported and is operated by hand. The idea is to cut thin-walled, open sheet metal profiles, primarily of standardized profile shapes and sizes, as used exclusively in the drywall trade.

Known devices for cutting drywall profiles are difficult to use. A special lever cutting tool for drywall profiles is known, in which an upper blade rigidly attached to the operating lever and a cutting block with a slot in the middle, which contains slots for different profile widths across the cutting edge, are arranged.

Furthermore, a tool is known in which a lower cutting block, which contains an adjustment part that can be set to different profile widths, and an upper knife that is also rigidly attached to the operating lever, are arranged.

Tools with multiple slots have the disadvantage that if only one profile size wears out, the entire cutting block must be reworked.

In addition, the slots are very wide for profiles with a bead and this results in undesirable deformation of the cutting edge.

The advantage of these designs is that the profiles can be simply and easily inserted into the device and the separation process can be carried out manually. The design effort and construction of these devices is, however, complex and time-consuming.

Publications considered: ^:

Patent specification DE 4401685 C 2, utility model DE 29516194 U

The invention specified in claim 1 is based on the problem of creating a profile cutting tool that enables the use of the advantages of the known designs explained, while reducing their disadvantages and at the same time allowing a minimized, needs-based number of profile sizes while being universally applicable for many profile sizes and shapes. According to the invention, the problem is solved in that, for example, for each U-profile width (web) with different leg heights, a cutting plate cassette, which is formed by two cutting plates of the same dimensions and two guide rails in between, is arranged interchangeably on a base frame between two fixed guide rails.

The profile contour cutout in the cutting plate corresponds to the profile's external dimensions. The cutout depth is intended for the maximum leg height that occurs. The space between the cutting plates, which is formed by two guide rails of different widths, creates the guide space for the pivoting upper cutting plate, which is optimally designed with a symmetrical cutting contour for all profiles occurring in the tool and is movably arranged on the hand lever so that the symmetry line of the upper cutting plate is offset from the symmetry line of the profile cutout of the cutting plate cassette during the cutting process.

The parallel guidance of the upper cutting plate is achieved by guide ring tongues and guide rails of the cutting cassette.

To facilitate the insertion of the upper cutting plate, these guide tongue ends are rounded with a radius that corresponds to half the blade width.

The replacement cassettes are changed by loosening a clamping screw on a guide rail. The cutting plate can be easily resharpened after unscrewing the pinned replacement cassettes.

The tool design with exchangeable cassettes allows for tool storage that is adapted to the range of use. The arrangement of the tool, for example on a wooden plank as a base, allows for safe, mobile and rough handling on construction sites.

An embodiment of the invention is explained using Figures 1-3. They show:

Fig. 1 the profile cutting device in side view Fig. 2 the profile cutting device in top view Fig. 3 a partial side view in section The view according to Fig. 1 shows the profile cutting tool for cutting thin-walled sheet metal profiles (4) with the base frame (1), the guide rails (2) with inserted replacement cassette (3), the hand lever (7), which is attached to the clamping end (8) with two tabs (9) and two bolts (10) on the base frame (1) so that it can rotate and pivot.

The pivoting upper cutting plate (12) is connected to the hand lever (7) by the hinge pin (11) and is guided parallel by the guide tongues (15) in the guide rails (6). The top view according to Fig. 2 shows the base frame (1) fastened with screws (16) to the lower support (13), guide rail (2) with an inserted replacement cassette (3) secured by a clamping screw (14) consisting of two cutting plates (5) and two guide rails (6).

Fig. 3 shows a partial section of the recessed surface (17) of a cutting plate (5) of the replacement cassette (3).

List of reference symbols

( 1) Base frame

( 2) Guide rail

( 3) Replacement cassette

( 4) Sheet metal profile

( 5) Cutting plate

( 6) Guide rail

( 7) Hand lever

( 8) Clamping

( 9) Tab

(10) Bolts

(11) Pivot pin

(12) Upper cutting plate

(13) Subcarrier

(14) Clamping screw

(15) Side guide tongues

(16) Screw

(17) Recessed area

Claims (4)

Protection claims: 1. Profile cutting tool for separating thin-walled sheet metal profiles in manual operation, characterized in that on a base frame (1) consisting primarily of a U-profile, two vertical guide rails (2), one of which is provided with a clamping screw (14), for receiving replacement cassettes (3) with symmetrical profile contour cutouts (4), each consisting of two cutting plates (5) and two guide strips (6) detachably connected to the clamping end (8) of the hand lever (7) via a tab (9) and two hinge pins (10) rotatably and pivotably mounted on the base frame (1), on which an upper cutting plate (12) pivotable via hinge pins (11) with lateral guide tongues (15) and a special symmetrical cutting contour is arranged, off-center to the profile contour cutout (4) of the replacement cassette (3). 2. Profile cutting tool according to claim 1, characterized by that the guide rails (6) are of different widths and therefore the upper cutting plate (12) is guided off-center to the profile contour cut-out (4) of the cutting cassette (3). 3. Profile cutting tool according to claims 1 and 2, characterized by that the cutting contour of the upper cutting plate (12) is designed in such a way that there is always a cutting angle <" 30° between the parallel cutting edges of the exchange cassette (3). 4. Profile cutting tool according to claims 1-3, characterized by that the cutting plate (5) of the exchange cassette (3) has a recessed surface (17) in the lower area.