RU2307800C1 - Glass cutter - Google Patents

Abstract

FIELD: glass industry; other industries; production of the glass cutters.

SUBSTANCE: the invention is pertaining to the manual tools for the glass sheets cutting. The technical result of the invention is expansion of functionalities, increase of reliability of the glass cutter operation, simplification of its design and the improved process of its manufacture. For this purpose the glass cutter includes: holder and the cutting head mounted in its pit and consisting of the similar diameter of the internal and external round-type disks, which are connected among themselves and with the holder by the screw with the possibility of turning around it with respect to the holder; the cutting rollers connected with the disks and fixed between the disks on the shafts; the faceted shank end of the external disk located in the corresponding faceted nest of the internal disk. At that the screw threading is located in the faceted shank end of the external disk. In the cross-section the external disk is made stepped with the height of a step, which exceeds the thickness of each cutting roller located on the periphery of the step. On the face side of the external disk there is the deepening identical to the form of the step in the plane of the external disk. On the internal side of the holder facing the internal disk there is the annular groove, in which the end of each shaft of fastening of the cutting roller is placed, and the ratio of the diameter "d" of the cutting roller to the diameter "D" of the cutting head is chosen from the condition of d=D(0.2÷0.5).

EFFECT: the invention ensures expansion of the functionalities, the increased reliability of the glass cutter operation, simplification of its design and the improved process of its manufacture.

5 cl, 10 dwg

Description

The technical solution relates mainly to hand tools for cutting sheet glass. It can be used in devices for cutting glass with a mechanical drive.

Among industrial designs, a disk cutter is known, characterized by the presence of a semicircular handle with a hole, a cutting disk round head with at least one cutting element fixed to it [1]. Another tool with a cutting element is known, comprising a handle with a recess, a recess and a hole, the recess being made at the end of the handle, and a circular cutting head with a cutting element is located in this recess [2].

Known rotary cutter containing a handle, a rotor at the end of the handle with cutting elements, while the rotor is located in the recess of the handle [3]. Known cutters (options), while one of the options has a flat handle with a recess, a cutting head with cutting elements at the end of the handle [4].

Known cutting head, between the disks of which are cutting knives, between each of which is a spacer ring [5]. Also known is a cutting head containing a holder with cutting rollers, while the holder has a housing with axes on which the cutting rollers are mounted, the central part of the housing, in the hollows of which there are rollers between its vertices [6].

Known cutting head containing a clip with cutting rollers, while the clip has a housing with axes on which the cutting rollers are mounted, the central part of the housing, on the tops of which the rollers are located [7].

A device for cutting glass containing a holder, in the recess of which is located a disk with cutting rollers fixed to it by means of axes [8].

Known glass cutter containing a holder with a cutting head made of a disk connected by a screw to the holder, between the disk and the holder there is a washer, which is on one side in contact with the inner surface of the holder, and the other side with the sides of the cutting rollers mounted on the axes between the washer and disk, while the axis are located in the recesses of the disk [9].

Known glass cutter containing a cutting head, which includes a housing and a disk connected to it by a screw with pin holes on which the cutting rollers are installed in the gap between the housing and the disk, an annular disk protrusion for the formation of the specified gap, ring grooves in the housing, in which the ends are located pins [10].

Known glass cutter containing a housing on which a screw is fixed to a cutting head made of a disk with a radial external groove, cutting rollers mounted on pins, the ends of which are located in the recess of the housing [11].

Of the known closest technical solution to this invention in essence and the achieved effect is a glass cutter, including a holder and a cutting head installed in its recess, consisting of internal and external disks, which are interconnected with the holder by a screw with the possibility of turning the disks around the screw relative to the holder, cutting rollers mounted between the disks on the axles, a faceted shank of the outer disk located in the corresponding faceted socket of the inner disk, the screw thread being located it is married in a faceted shank of an external disk [12].

This glass cutter, due to the presence of a ring installed between the disks, has a relatively large number of joints of its parts, respectively, a complex structure. Essential in the reliability of the glass cutter is the specified working position of the cutting roller, while the reliability is higher, the less there are connections of its parts and the gaps between them in the cutting head. Another feature of the known technical solution is that it does not provide means for using cutting rollers of increased diameters in order to expand the functionality of the glass cutter.

Solved and achievable technical task of the present invention is to expand the functionality and increase the reliability of glass cutting. Another objective is to simplify the design of glass cutter and increase the manufacturability of its manufacture.

The stated technical problems are solved by the fact that in a glass cutter including a holder and a cutting head installed in its recess, consisting of round and circular disks having the same diameter, which are interconnected with the holder and a screw that can be rotated around it relative to the holder, cutting rollers fixed between the disks on the axes, a faceted shank of the outer disk located in the corresponding faceted socket of the internal disk, while the screw thread is located in the faceted hv in the cross section of the outer disk, the outer disk is made stepped with a step height that is greater than the thickness of each cutting roller located on the periphery of the step, a recess is made on the front side of the outer disk that is identical to the shape of the step in terms of the outer disk, on the inner side of the holder facing towards to the inner disk, an annular groove is made in which the end of each axis of attachment of the cutting roller is placed, and the ratio of the diameter d of the cutting roller to the diameter D of the cutting head is selected from the condition d = D (0.2 ÷ 0, 5).

The level of the outer disk in the plan is made round.

The outer disk step is oval in plan and the cutting rollers are located above the large sides of the oval.

The outer disk stage in the plan is made curly, at least Y-shaped, and the cutting rollers are located in the recesses of the Y-shaped stage.

Each recess of the Y-shaped step is made along the radius R of the body of revolution, and this radius is greater than the radius of the cutting roller.

Figure 1 shows a glass cutter,

Figure 2 is a section aa in figure 1.

Figure 3 - arrangement of the cutting rollers on the outer disk having a round step.

Figure 4 - arrangement of the cutting rollers on the outer disk having an oval step.

Figure 5 - arrangement of the cutting rollers on the outer disk having a curly Y-shaped step.

6 is a diagram of the location of the cutting rollers on the outer disk having recesses of the step along the radius of the body of revolution.

7-9 - execution of the front side of the outer disks of the glass cutter, respectively, with round, oval and curly recesses.

Figure 10 - execution of the front side of the outer disk with a Y-shaped recess, which has protruding peripheral parts and internal parts in the form of recesses, made along the radius of the body of revolution.

The glass cutter includes a holder 1 and a cutting head 3 installed in its recess 2, which includes an internal disk 4 and an external disk 5. The disks are made of the same diameter and are interconnected with the holder 1 by a screw 6 with the possibility of turning the disks around the screw relative to the holder. Cutting rollers 7 are connected to the disks, which are fixed between the disks on the axes 8. The faceted shank 9 of the outer disk 5 is located in the corresponding faceted socket of the inner disk 4. The thread of the screw 6 is located in the faceted shank 9 of the outer disk.

In cross section, the outer disk 5 is stepped, with a height h of the step 10 of this disk, which is greater than the thickness of the cutting roller 7. On the front side 11 of the outer disk 5 there is a recess 12, the external shape of which is identical to the shape of the stage 10 in terms of the outer disk 5. In other In cases of execution, the shape of the recess 12 may differ from the shape of the step, for example, as shown in FIGS. 4 and 8. This is done with the aim of more efficiently forcing the metal powder when pressing the outer disk 5 for high-quality molding of its faceted tail ka 9.

Shown in the drawings, the shape of the Y-shaped step 10 and, accordingly, the recess 12 have three protruding outward parts. However, this is a special case of the execution of these forms, since the protruding outward parts of the step 10 and parts of the recesses 12 can be more than three. For example, the step 10 can be made cruciform, corresponding to this stage, the recess 12 also perform cruciform.

An annular groove 14 is made on the inner side 13 of the holder 1, in which the end of each axis 8 of the attachment of the cutting roller 7 is located. The step 10 has a front surface 15. The ratio of the diameter d of the cutting roller to the diameter D of the cutting head is selected from the condition d = D (0.2 ÷ 0.5).

In one design (FIG. 3), the step 10 of the outer disk 5 is circular in plan and the cutting rollers 7 are located around the step 10 around its perimeter.

In another embodiment (FIG. 4), the step 10 of the outer disk 5 is oval in plan and the cutting rollers 7 are located above and below the two large sides of the oval.

In the third embodiment (Fig. 5), the step of the outer disk 5 is in the plan made curly, at least Y-shaped, with rounded outer and inner corners, and the cutting rollers are located in the recesses of the curly Y-shaped step.

Each recess of the Y-shaped step 10 is made along the radius R of the body of revolution, and this radius is greater than the radius of the cutting roller 7. The outer disc 5 is designed to have its step 10 (Fig.6), having a Y-shape, with the radius of the body of rotation is the peripheral and internal parts. Accordingly to this step design, a recess 12 of the outer disk is made from its front side.

Between the side surfaces of the cutting roller 7 and the adjacent surfaces of the inner and outer discs, gaps are formed for the free rotation of the cutting rollers between the discs (in FIG. 2, these gaps are not shown). Position 16 shows the threaded hole of the outer disk 5 for screw 6.

The glass cutter works as follows.

The parts of the glass cutter, assembled in the form in which they are shown in FIG. 2, are compressed by screw 6 during assembly. The front surface 15 of the step 10 of the outer disk 5 is pressed against the outer side of the inner disk 4, and the latter is pressed against the inner surface 13 of the holder 1. When This preserves the specified clearance between the disks 4 and 5, which is equal to the height h of the step 10. The specified clearance is necessary both for the rotation of the cutting rollers 7 around the axes 8, and for microscopic displacements of the cutting rollers along the axes 8 when cutting glass. Since the accuracy of the choice of the gap between the disks affects the quality and reliability of glass cutting, in the manufacture of the glass cutter and its parts, the outer disk 5 is pressed in order to obtain a more accurate height h of the step 10 of the outer disk. The outer disk 5, made of metal powder by pressing and sintering, is crimped in its central part, on the frontal surface area 15 of step 10 in order to eliminate bending loads and destruction of the outer disk 5. In this case, the steps 10 of the outer disks 5 are pressed from the front sides 11 of the outer disks 5 through their recesses 12, having various shapes identical to the shapes of the steps 10 of the outer disks in plan.

Since each step 10 of the outer disk 5 in plan for different versions of the outer disks can be made round, oval or Y-shaped, or cross-shaped, according to these forms of the steps 10 of the outer disks, the arrangement of the cutting rollers 7 around the step of each particular outer disk is chosen, proceeding of the specified functionality of the glass cutter, determined by cutting thin, medium or thick glass. The shape of the step 10 of the outer disk 5 sets the number of cutting rollers and their diameters. In this regard, the optimal values of the diameters of the cutting rollers are determined depending on the diameters of the cutting heads and the shape of the steps of the outer disks of the cutting heads. The location of the cutting rollers around the step, their number and the diameters of the rollers are calculated and selected depending on the shape of the step 10 in terms of d = D (0.2 ÷ 0.5), where d is the diameter of the cutting roller, D is the diameter of the cutting head.

If it is necessary to expand the functionality of the glass cutter, the screw 6 is unscrewed, the outer disk 5 and the cutting rollers 7 are removed, the cutting rollers of a larger or smaller diameter are installed on the inner disk 4, the outer disk 5 corresponding to the selected cutting rollers is installed, and then the disks are pulled together by a screw 6 and fixed them on the holder 1 glass cutter. If necessary, the disks 4 and 5 are rotated relative to the holder 1 around the screw to position each cutting roller in its working position.

Information sources

Industrial designs.

1. US patent 430475 08-03, 10.25.1999, Prototypes of foreign countries, 2001, issue 2, part 1, 2 half., P. 63.

2. US Patent D 458105 S, 08-03, 03/08/2001, Industrial Designs of Foreign Countries, 1 sex. 2002, p. 65.

3. Australian Patent 130479, 08-03, 07/03/1997, Industrial Designs of Foreign Countries, 1997 part 1, 2 half., P. 42, 66, 74.

4. Swedish Patent DM / 030895, 08-03, 05.10.1994, Industrial Designs of Foreign Countries, 1994, 2nd half, p. 43.

Inventions

5. SU 631463, 11/05/1978.

6. SU 785249, 12/17/1980.

7. SU 975610, 11/23/1982.

8. SU 1087479, 04.23.1984.

9. SU 1248966, 08/07/1986.

10. SU 1375581, 02.23.1988.

11. SU 1705243, 01/15/1992.

12. RU 2037473, 06/19/1995 - prototype.

Claims (5)

1. Glass cutter, including a holder and a cutting head installed in its recess, consisting of round and circular disks having the same diameter, which are interconnected with the holder and a screw that can be rotated around it relative to the holder, cutting rollers connected to the disks fixed between the disks on axes, a faceted shank of the outer disk located in the corresponding faceted socket of the inner disk, the screw thread being located in the faceted shank of the outer disk, characterized in that the cross section of the outer disk is made stepped with a step height that is greater than the thickness of each cutting roller located on the periphery of the step, a recess is made on the front side of the outer disk that is identical to the shape of the step in terms of the outer disk, an annular ring is made on the inner side of the holder the groove in which the end of each axis of attachment of the cutting roller is located, and the ratio of the diameter d of the cutting roller to the diameter D of the cutting head is selected from the condition d = D (0.2 ÷ 0.5). 2. The glass cutter according to claim 1, characterized in that the step of the outer disk in the plan is made round. 3. The glass cutter according to claim 1, characterized in that the step of the outer disk is oval in plan and the cutting rollers are located above the large sides of the oval. 4. The glass cutter according to claim 1, characterized in that the step of the outer disk in the plan is made curly, at least Y-shaped, and the cutting rollers are located in the recesses of the Y-shaped step. 5. The glass cutter according to claim 4, characterized in that each recess of the Y-shaped step is made along the radius R of the body of revolution, and this radius is greater than the radius of the cutting roller.

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