JPH0761386B2 - Cutting tool - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a cutting tool, in particular an attachment part and a blade attached to it.
It relates to a cutting tool which comprises a part and in particular comprises a drive means oscillating about a pivot axis for separating the bead of elastic adhesive on a window glass of a vehicle.

(Prior Art and Problems to Be Solved) In automobile technology, window glass is increasingly fixed to a window frame of a vehicle body with an adhesive. The space between the window pane and the window frame is filled with an adhesive mass for the purpose of fixing the window pane. The adhesive mass preferably comprises a synthetic rubber or polyurethane one-component adhesive. In order to remove these glazings from the window frame again, this adhesive mass must be cut off.

EP-A-0141035 (EP-A0141035) already discloses a cutting tool for this purpose, comprising a mounting part and a blade part mounted thereto.
This blade section is designed in a straight line and is particularly suitable for cutting off the bead of adhesive which is arranged on one side of the glazing.

However, in some types of vehicles, a bead of adhesive does not only lie against one side of the glazing during the gluing of the glazing, but often and at least partially It is unavoidable to lie down on an individual face. The two faces of the glazing, for example the end faces at right angles to the surface of the glazing, and additionally the lateral faces inside or outside the glazing, which extend parallel to the surface of the glazing, are generally at right angles to each other. In such cases, cutting tools with straight blade sections are not suitable. This is because it is difficult for the cutting tool to be guided through such a bead of adhesive.

Therefore, it is an object of the present invention to provide a general type of cutting tool,
A modification is also made suitable for separating the bead of adhesive that adheres to two or more glass surfaces that extend at right angles to each other.

The object of the invention is a cutting tool of the type mentioned at the outset, which comprises two blade arms whose blade parts are bent at an angle and adjoin one another. Of the blade arm of the cutting tool is sharpened in the cutting direction and has a cutting edge which extends across the cutting direction to the other blade arm.

The cutting tool of the invention has, inter alia, the advantage that a blade with corners can be pierced and guided in the bead of adhesive. One blade arm of the blade extends substantially parallel to one side of the glass and the other blade arm extends parallel to the other side of the glass and the cutting edge is adhesive even at the point where the blade arm joins. Allows easy disconnection of beads. This is
A simple and problem-free glass separation whether or not the cutting tool of the invention adheres to the glass at the edges of the glass on two sides of the glass where the adhesive mass extends at right angles to each other. Means to enable.

Since the transverse planes of the glass are generally at right angles, it is advantageous for the blade arms to be at substantially right angles to each other.

Cutting, especially in the area where the blade arms join
In order to be as free from drag as possible, the cutting edges of the blade arms should be continuous with each other, i.e. there should be no additional corners which cause increased friction in these areas and therefore make the cutting more difficult. It is advantageous to do Since the adhesive mass is elastic but generally very viscous, the blade arm has a flat design in cross-section, which means that the adhesive mass to be separated is pressed far away from the blade arm. It is advantageous to make it unnecessary.

Furthermore, it is possible in principle that the blade arm is ground only on one side and the cutting edge is located in the plane formed by one surface of the blade arm. However, a cutting tool polished in this way
Does not have great resistance to wear and tear. In addition, cutting tools that are ground on one side have the disadvantage that they always have a tendency to disengage from the bead of adhesive in one direction. For this reason, the preferred embodiment comprises a blade arm, which in cross-section is designed such that both sides are convexly inclined towards the cutting edge, ie both sides of the blade arm are polished.
This type of design has the advantage that the blade arm tends to continue cutting in a straight line, in addition the blade arm is more stable and more resistant to wear and tear.

In a particular embodiment, it has the advantage that the blade arm has cutting edges on both sides, i.e. cutting is possible both in forward and backward directions. Furthermore, the cutting edges arranged on both edges make it easier to pierce the adhesive mass with the cutting tool according to the invention.

An improved guidance of the cutting tool according to the invention is possible when the cutting edge of the outer blade arm is curved and the center of the curve is located in the direction of the cutting, in particular laterally facing the pivot axis. In this case, the cutting tool does not tend to pop out of the adhesive mass during cutting while being retained within the adhesive mass itself.

The above embodiments do not specify how the blade portion is aligned with the mounting portion. It is advantageous, for example, for the blade part to be arranged in the mounting part such that the outer blade arm lies in a plane approximately perpendicular to the pivot axis. In this case the cutting is preferably carried out by an outer blade arm, the inner blade arm located between the outer blade arm and the mounting part being guided in a circular path around the pivot axis.

In exchange, it may be advantageous for the blade part to be arranged in the mounting part such that the inner blade arm lies in a plane approximately perpendicular to the pivot axis. With such a tool, the cutting is preferably carried out by the inner blade arm, which moves only in one plane during the cutting, while the outer blade arm is guided along a circular path. It

In the most advantageous embodiment, which is selected especially when areas of adhesive mass of approximately equal width are to be separated using the outer blade arm and the inner blade arm, in the outer blade arm and the inner blade arm The blade portions are arranged in the mounting portion such that both lie on a conical surface concentric with the pivot axis.

In these embodiments, the mutual placement of the blade portion and the attachment portion is such that the inner blade arm fitted to the attachment portion aligns with the attachment portion or the inner blade arm projects at an angle from the attachment portion. Is selected. In the preferred embodiment, which is extremely simple to manufacture, the inner blade arm is approximately L from the mounting portion.
It projects in a letter shape.

In another suitable embodiment, the outer blade arm forms a generally U-shape with the inner blade arm and the mounting portion.

Finally, it is advantageous for the protection of the window frame and the glazing that the mounting part has a casing or coating on the part facing the inner blade arm. This coating prevents vibrating mountings from hitting the window frame and window glass,
Prevent them from damage.

However, it is further advantageous if a support stop member is provided in the mounting part. This member can be designed in any shape, for example in the form of a rotatably supported roll. The support stop member is preferably made of a soft, shock-absorbing material and on the one hand provides a means for protecting the glazing and the window frame, and on the other hand an additional cutting tool during the separation of the adhesive mass. It should be used to provide guidance. This means preventing the blade portion from cutting into the adhesive mass at unequal depths.

The support stop member or coating is arranged such that the end surface facing the blade portion is approximately in the transition zone from the attachment portion to the blade portion.

Additional features and advantages of the invention are the subject of the following description and drawings of several embodiments.

EXAMPLE FIG. 1 shows in detail a first example of a cutting tool of the present invention, generally designated by 10. The cutting tool comprises a blade portion 12 with an outer blade arm 14 and an inner blade arm 16 projecting at a right angle from the outer blade arm 14. The inner blade arm 16 is connected to a mounting portion, generally designated 18. This mounting part 18
Also comprises an arm 20 aligned with the inner blade arm 16 and an arm 22 arranged at a right angle to the arm 20.

The arm 22 preferably comprises a multi-sided opening 25, as shown in FIG. This multi-sided opening 25 allows the cutting tool 10 to be
Vibratory pivot driven oscillating shaft 26 designated as a whole by 28
The action of attaching to. The rocking shaft 26 has on its own a complementary portion 30 corresponding to the multi-sided opening 25, the cutting tool 10 being held against rotation on the rocking shaft 26, oscillatingly and about the pivot axis 24. Driven pivotally to.

The arm 20 additionally comprises a coating 32, preferably made of elastic material, which acts as a cushioning material.

In accordance with the present invention, the blade portion 12 is such that both the outer blade arm 14 and the inner blade arm 16 have cutting edges 34 and 36, respectively, such that the cutting edges 34 and 36 meet one after the other. , Designed.

The outer and inner blade arms 14, 16 are convex in their cross-section, as shown in FIG. 4, therefore they are preferably both sides on their respective cutting edges.
Polished towards 34 or 36.

The trailing edges 38, 40 lying opposite the cutting edges 34, 36 are
In another preferred embodiment, it is also polished so that it can be cut in both directions.

In addition, the cutting edge 34 of the outer blade arm 14 is curved and the center of curvature of the cutting edge is located in front of this cutting edge 34 in the cutting direction.

As depicted in Figures 1-3, the cutting tool 10 is suitably designed in one piece. That is, the blade portion 12 mates with the mounting portion 18. Blade part 12 and mounting part
The field lines between 18 are recognized simply by the coating 32 including an edge 42 that terminates at the beginning of the inner blade arm 16 with a cutting edge 36 and extends across the inner blade arm 16.

In use, the cutting tool 10 of the present invention engages a generally L-shaped space 44 between the windowpane 46 and window frame 47 of an automobile. This space 44 is filled with some adhesive mass 48, which holds the window glass 46 in the window frame 47. The windowpane 46 is a block of adhesive, usually elastic.
In order to be removed from 48, the adhesive mass 48 must be cut. For this purpose, the cutting tool 10 penetrates the adhesive mass 48 with its blade portion 12 and is guided along the space 44 into position as shown in FIG. The cutting edges 34 and 36 cut through the adhesive mass 48 by the oscillating movement of the cutting tool about the pivot axis 24.

The coating 32 is a window frame 47 of a car body that is generally painted.
In order to protect the as much as possible from damage, it acts in particular by its edges 42. Because this coating 32 is
This is because 18 acts as a cushioning material when hitting the window frame 47.

In a simplified embodiment, the cross sections of the outer blade arm 14 and the inner blade arm 16 are such that they have cutting edges 34 or 36, respectively, on one side only, as shown in FIG. However, the rear side 50 of each of the outer blade arm 14 and the inner blade arm 16 is selected to have no blades.

One example of a cutting tool of the present invention suitable for a particular application is shown in FIG. In the embodiment of FIG. 7, the mounting portion 18 'is flat, unbent and aligned with the inner blade arm 16'. This inner blade arm 16 '
Extend in a plane approximately perpendicular to the pivot axis 24 '. An outer blade arm 14 ', which projects substantially vertically from the inner blade arm 16', moves along an arc about a pivot axis 24 '. The blade portion 12 'of this embodiment is otherwise designed according to the blade portion 12 of the previous embodiment.

Additionally, the mounting portion 18 'comprises a stop roll 52 rotatable about a pin 54. The pin 54 is mounted on the mounting portion 18 'and aligned generally parallel to the pivot axis 24'. These stop rolls 52, which are preferably made of a flexible elastic material, include space 44 in which the cutting tools are supported by the stop roll 52 on both the window glass and the window frame.
It has the advantage that it is prevented from reaching too deep into.

Another embodiment shown in Figure 8 has a blade portion 12 "that is similar in design to the blade portion 12. However, the inner blade arm 16" is not aligned with the attachment portion 18 "and Angle from section 18 ", preferably 45
It projects at an angle of degrees.

The mounting portion 18 "itself is mounted on the swing shaft. The pivot axis 24" of the swing shaft is substantially perpendicular to the mounting portion 18 ". The outer blade arm 14" and the inner blade arm 16 "are It moves along a conical surface about the pivot axis 24 ″.

The mounting portion 18 "is provided with a coating 32" at the portion facing the inner blade arm 16 ". This coating also serves to avoid damage to the vehicle body or window frame.
42 ″ forms an angle of almost 45 degrees on the mounting section 18 ″,
Located in the transition area from the mounting portion 18 "to the blade portion 12".

In an advantageous development of this embodiment, the coating 32 "can be a roll rotatable about the longitudinally aligned axis of the mounting portion 18" and therefore can act as a guide roll during use of the cutting tool. It can be replaced by a roll.

The cutting tool of the embodiment shown in FIG. 8 has the advantage that it is introduced into the space between the windowpane and the window frame from both sides, ie from the outside of the windowpane as well as from inside the windowpane and cutting. It has the advantage that However, for this purpose, the cutting tool according to FIG. 8 is preferably adapted to be mounted from both sides on a rocking shaft with an oscillating pivot drive.

[Brief description of drawings]

1 is a partial sectional view showing a cutting tool in use according to a first embodiment of the present invention, FIG. 2 is a perspective view of the first embodiment of FIG. 1, and FIG. 3 is a front view of the first embodiment. , FIG. 4 is line 4-4 of FIG.
5 is a sectional view taken along line 5-5 of FIG. 3, FIG. 6 is a sectional view similar to FIG. 4 of the second embodiment of the present invention, and FIG. 7 is a sectional view of the present invention. FIG. 8 is a front view of the third embodiment, and FIG. 8 is a front view of the fourth embodiment of the present invention. 10 …… Cutting tool, 12 …… Blade part, 14, 14 ′, 14 ″
…… Outer blade arm, 16, 16 ′, 16 ″ …… Inner blade arm, 18,18 ′, 18 ″ …… Mounting part, 20,22
…… Arm, 24, 24 ′, 24 ″ …… Pivot axis, 25 ……
Multi-sided opening, 26 ... Oscillating shaft, 28 ... Oscillating pivot drive, 32, 32 "... Cover, 34, 36 ... Cutting edge, 38, 40
…… rear edge, 42, 42 ″ …… edge, 44 …… space, 46 ……
Window glass, 47 ... Window frame, 48 ... Adhesive mass, 50 ... Back, 52 ... Stop roll (support stop member), 54 ...
…pin.

Continuation of the front page (56) References Showa 60-57365 (JP, U) Showa 43-30640 (JP, Y1) Showa 36-24131 (JP, Y1)

Claims (15)

[Claims] 1. A cutting tool for cutting a beat of an elastic adhesive, which comprises a mounting portion (18), a blade portion (12) attached thereto, and a driving means for vibrating the mounting portion around a pivot axis (24). The blade portion is bent at an angle and comprises two blade arms (14, 16) adjacent to each other, each of the two blade arms (14, 16) being sharpened in the cutting direction. The cutting edges (34, 36) of the two blade arms (14, 16) are continuous with each other and have a cutting edge (34, 36) extending across the cutting direction to the other blade arm. Characteristic cutting tool. 2. A cutting tool according to claim 1, characterized in that the two blade arms (14, 16) are arranged substantially at right angles to each other. 3. A cutting tool according to claim 1 or 2,
Cutting tool characterized in that the two blade arms (14, 16) are designed to be flat. 4. The cutting tool according to any one of claims 1 to 3, wherein the two blade arms (14, 16) are convex in cross-section on both sides toward the cutting edges (34, 36). A cutting tool which is designed to be inclined in a shape. 5. A cutting tool according to claim 1, wherein the two blade arms (14, 16) have cutting edges (34, 36, 38, 40) on their opposite edges. ) Has a cutting tool. 6. The cutting tool according to claim 1, wherein the cutting edge (3) of the outer blade arm (14) is used.
A cutting tool characterized in that 4) is curved and the center of the curve is located in the cutting direction. 7. A cutting tool according to claim 1, wherein the blade portion (12) is arranged in a plane in which the outer blade arm (14) is substantially perpendicular to the pivot axis (24). Cutting tool, which is arranged on the mounting part (18) so that 8. The cutting tool according to claim 1, wherein the blade portion (12) is arranged in a plane in which the inner blade arm (16) is substantially perpendicular to the pivot axis (24). Cutting tool, which is arranged on the mounting part (18) so that 9. The cutting tool according to claim 1, wherein the blade portion (12) has a conical surface in which both blade arms (14, 16) are concentric with the pivot axis (24). A cutting tool, characterized in that it is arranged on the attachment part (18) such that it is arranged on. 10. Cutting tool according to claim 9, characterized in that the inner blade arm (16) projects at an angle from the mounting part (18). 11. Cutting tool according to claim 7, characterized in that the inner blade arm (16) projects from the mounting part (18) in a substantially L-shape. 12. A cutting tool according to claim 7, characterized in that the outer blade arm (14) forms a substantially U-shape with the inner blade arm (16) and the mounting part (18). Cutting tool. 13. The cutting tool according to claim 1, wherein the attachment portion (18) has a coating (32) at a portion facing the inner blade arm (16). A cutting tool to do. 14. A cutting tool according to any one of claims 1 to 12, characterized in that a support stop member (52) is provided on the mounting part (18). 15. The cutting tool according to claim 13 or 14, wherein the support stop member (52) facing the lateral surface (42) of the coating (32) or the blade portion (12) comprises a mounting portion (42). Cutting tool characterized in that it is located in the area of the transition from 18) to the blade part (12).