Cutting machine head with beveling function and cutting equipment

Abstract

The utility model provides a cutting machine head with a beveling function and cutting equipment, and belongs to the technical field of cutting, the cutting machine head comprises a rotating assembly, the output end of the rotating assembly is connected with a support, and the support is driven by the rotating assembly to rotate in the circumferential direction; the cutting assembly is movably connected to one end of the support, and the cutting assembly comprises a shell with the hollow interior; the cutting motor is mounted on the shell, and the output end of the cutting motor extends into the shell; one end of the eccentric shaft structure is connected with the output end of the cutting motor, an inclined cutter is arranged at the other end of the eccentric shaft structure, the cutting motor drives the inclined cutter to reciprocate through the eccentric shaft structure, and the balance structure is located at the end, connected with the cutting motor, of the eccentric shaft structure. When the inclined cutter moves in the feeding direction, vibration cutting is achieved under the action of the cutting assembly, so that the flatness of a cut section is guaranteed, the tipping phenomenon and material damage are avoided, and the cutting quality of materials is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting, and relates to a cutting head, in particular to a cutting head with a bevel cutting function and a cutting device. Background Art

[0002] With the popularization of automated cutting, automated cutting machines are applied in more and more industries. In the prior art, not only the end face to be cut needs to be set as a plane, but also the end face to be cut needs to be set as an inclined plane. Therefore, in order to adapt to the bevel cutting of the material to be cut, the bevel cutting tool came into being.

[0003] For example, a bevel cutting tool angle control structure disclosed in Chinese Patent (CN214187477U) includes a tool holder rotating shaft, a tool holder fixing frame, a blade fixing seat and a blade. The tool fixing frame is installed on the tool rotating shaft. The blade fixing seat is connected to the tool holder fixing frame. The blade is a bevel cutting tool blade. The blade is installed on the blade fixing seat. When the blade is adjusted in angle or rotates around the Z axis, the tip position of the blade remains fixed; a guiding groove is provided on the tool holder fixing frame, and the blade fixing seat is connected to the tool holder fixing frame through the guiding groove.

[0004] When the above-mentioned bevel cutting tool cuts, the bevel cutting tool moves along the cutting direction, so as to realize the bevel cutting of the material. However, this type of bevel cutting tool can only be applied to the material to be cut with a relatively thin thickness. When the thickness of the material to be cut is relatively thick, when the bevel cutting tool feeds along the cutting direction, on the one hand, it may cause the bevel cutting tool to be unable to cut after traveling a certain distance. If continuous output is continued, there may be a risk of chipping; on the other hand, it will cause the cutting section of the material to be cut to be uneven and damage the material to be cut. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above problems existing in the prior art, and propose a cutting head that can realize good bevel cutting of materials, ensure the flatness of the cutting section, and avoid chipping and material damage.

[0006] The purpose of the utility model can be achieved by the following technical solutions: A cutting head with a bevel cutting function includes:

[0007] A rotating assembly, the output end of the rotating assembly is connected with a bracket, and the bracket can be circumferentially rotated by driving of the rotating assembly;

[0008] A cutting assembly, movably connected to one end of the bracket, and the cutting assembly includes:

[0009] A housing, which is hollow inside;

[0010] A cutting motor, installed on the housing, and the output end of the cutting motor extends into the housing;

[0011] An eccentric shaft structure, with one end connected to the output end of the cutting motor and an inclined cutting tool provided at the other end. The cutting motor drives the inclined cutting tool to reciprocate through the eccentric shaft structure to achieve the vibration cutting of materials.

[0012] A balance structure, located at the end of the eccentric shaft structure connected to the cutting motor. When the cutting motor drives the eccentric shaft to rotate, it synchronously drives the balance structure to rotate, reducing the vibration caused by eccentricity.

[0013] In the above-mentioned cutting head with an inclined cutting function, the eccentric shaft structure includes:

[0014] An eccentric shaft, with one end nested and connected to the output end of the cutting motor and an eccentric shaft section provided at the other end.

[0015] A connecting rod, with one end nested and connected to the eccentric shaft section on the eccentric shaft and a connecting shaft provided at the other end.

[0016] A sliding seat, with one end nested and connected to the connecting shaft, and the connection between the sliding seat, the connecting shaft and the connecting rod is completed through fasteners. The inclined cutting tool is installed at the other end of the sliding seat.

[0017] In the above-mentioned cutting head with an inclined cutting function, the eccentric shaft is arranged in a stepped shape, and a first shaft section, a second shaft section, a third shaft section and a fourth shaft section are sequentially arranged along the output direction of the cutting motor. The third shaft section is the eccentric shaft section, and the fourth shaft section is the balance structure. The first shaft section, the second shaft section and the fourth shaft section are coaxially arranged. A first bearing and a second bearing are respectively nested on the first shaft section and the eccentric shaft section. The first shaft section is nested and matched with the housing, and the second bearing is nested and matched with the connecting rod.

[0018] In the above-mentioned cutting head with an inclined cutting function, the connecting rod includes a first connecting shaft sleeve and a second connecting shaft sleeve which are spliced up and down along the direction perpendicular to the output direction of the cutting motor. A first arc-shaped groove and a second arc-shaped groove are respectively arranged on the first connecting shaft sleeve and the second connecting shaft sleeve. A through groove nested and matched with the second bearing is formed by the splicing between the first arc-shaped groove and the second arc-shaped groove. The first connecting shaft sleeve and the second connecting shaft sleeve are connected through fasteners, or the connecting rod is integrally arranged, and a through groove nested and matched with the second bearing is arranged on the connecting rod.

[0019] In the above-mentioned cutting head with an inclined cutting function, a third bearing is nested on the connecting shaft, and a washer is arranged between the third bearing and the connecting rod. One end of the sliding seat is nested and matched with the third bearing, and the connection between the sliding seat, the connecting shaft and the connecting rod is completed through fasteners. The inclined cutting tool is installed at the other end of the sliding seat.

[0020] In the above-mentioned cutting head with a chamfering function, a strip groove is obliquely arranged on the sliding seat, and the chamfering cutter is embedded in the strip groove. The chamfering cutter is pressed between the sliding seat and the blade pressing plate through the blade pressing plate, and the connection between the sliding seat and the blade pressing plate is completed through fasteners.

[0021] In the above-mentioned cutting head with a chamfering function, a sliding structure is further arranged between the sliding seat and the inner wall of the housing. The sliding structure includes a slide rail arranged on the inner wall of the housing, and a slider connected to the sliding seat and slidably matched with the slide rail. Among them, through the sliding cooperation between the slider and the slide rail, the reciprocating movement of the chamfering cutter is realized.

[0022] In the above-mentioned cutting head with a chamfering function, the cutting assembly is rotatably connected to the housing, and an adjusting part and a rotating part are arranged between the cutting assembly and the housing. Among them, the angle of the chamfering cutter in the vertical plane is changed through the adjusting part, and the rotating part serves as the rotating support when the angle of the chamfering cutter in the vertical plane is adjusted.

[0023] In the above-mentioned cutting head with a chamfering function, the adjusting part includes an adjusting rod, one end of which is connected to the housing, and the other end is inserted and matched with an arc-shaped strip groove on the bracket. Among them, a fastening nut is screwed on the end of the adjusting rod that forms an insertion fit with the arc-shaped strip groove; the rotating part includes a rotating seat, and one end of the rotating seat is connected to the housing through fasteners, and the other end of the rotating seat is rotatably connected to the bracket through a rotating rod.

[0024] In the above-mentioned cutting head with a chamfering function, the output end of the rotating assembly is connected with a mounting sleeve, and a slip ring is installed at one end of the mounting sleeve close to the bracket. The two ends of the slip ring along its axis are respectively a fixed end and a movable end. Among them, the movable end is connected to the mounting sleeve, the mounting sleeve is connected to the bracket, and the wire on the fixed end is electrically connected to the circuit board in the rotating assembly through the internal space of the mounting sleeve, and the wire on the movable end is electrically connected to the cutting motor.

[0025] The present utility model also provides a cutting device, including the above-mentioned cutting head with a chamfering function.

[0026] Compared with the prior art, the beneficial effects of the present utility model are:

[0027] A cutting head with a chamfering function provided by the present utility model enables the chamfering cutter to perform vibration cutting under the action of the cutting assembly when moving along the feeding direction, thereby ensuring the flatness of the cutting section, avoiding the occurrence of chipping and damage to the material, and further improving the cutting quality of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of a cutting head with a chamfering function of the present utility model.

[0029] Figure 2 It is a schematic structural diagram of another perspective of a cutting head with a bevel cutting function according to the present utility model.

[0030] Figure 3 It is a schematic structural diagram of a cutting assembly in a preferred embodiment of the present utility model.

[0031] Figure 4 It is a sectional view of a cutting assembly in a preferred embodiment of the present utility model.

[0032] Figure 5 It is a schematic partial structural diagram of a cutting assembly in a preferred embodiment of the present utility model.

[0033] Figure 6 It is a schematic structural diagram of an eccentric shaft in a preferred embodiment of the present utility model.

[0034] Figure 7 It is a schematic structural diagram of a connecting rod in a preferred embodiment of the present utility model.

[0035] Figure 8 It is a schematic structural diagram of a sliding seat in a preferred embodiment of the present utility model.

[0036] Figure 9 It is a partial schematic diagram of a rotating assembly in a preferred embodiment of the present utility model.

[0037] Figure 10 It is a sectional view of a rotating assembly in a preferred embodiment of the present utility model.

[0038] In the figure, 100, rotating assembly; 110, mounting sleeve; 120, slip ring; 121, fixed end; 122, movable end; 130, wire; 140, circuit board;

[0039] 200, bracket;

[0040] 300, cutting assembly; 310, housing; 320, cutting motor; 330, bevel cutter; 340, eccentric shaft; 341, first shaft section; 342, second shaft section; 343, third shaft section; 344, fourth shaft section; 345, first bearing; 346, second bearing; 350, connecting rod; 351, first coupling sleeve; 3511, first arc-shaped groove; 352, second coupling sleeve; 3521, second arc-shaped groove; 360, sliding seat; 361, connecting shaft; 362, third bearing; 363, washer; 364, strip groove; 365, blade pressing plate; 370, slide rail; 380, slider;

[0041] 400, adjusting part; 410, adjusting rod; 420, arc-shaped strip groove; 430, fastening nut;

[0042] 500, rotating part; 510, rotating seat; 520, rotating rod. Specific embodiments

[0043] The following are specific embodiments of the present utility model. In combination with the accompanying drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indication will also change accordingly.

[0045] As Figures 1 to 10 shown, a cutting head with a chamfering function provided by the present utility model includes:

[0046] A rotating assembly 100, the output end of the rotating assembly 100 is connected to a bracket 200 arranged in an L shape, and the bracket 200 can be driven by the rotating assembly 100 to rotate circumferentially;

[0047] A cutting assembly 300, which is movably connected to the bracket 200, and the cutting assembly 300 includes:

[0048] A housing 310, which is hollow inside;

[0049] A cutting motor 320, which is installed on the housing 310, and the output end of the cutting motor 320 extends into the housing 310;

[0050] An eccentric shaft structure, one end of which is connected to the output end of the cutting motor 320, and the other end is provided with a chamfering cutter 330. The chamfering cutter 330 is driven by the cutting motor 320 through the eccentric shaft structure to reciprocate, realizing the vibration cutting of materials;

[0051] A balancing structure, which is located at one end of the eccentric shaft structure connected to the cutting motor 320. When the cutting motor 320 drives the eccentric shaft to rotate, the balancing structure is synchronously driven to rotate, reducing the vibration caused by eccentricity.

[0052] It is worth mentioning that the rotating assembly 100 in this embodiment is driven by a motor, which will not be elaborated here.

[0053] The cutting head with a chamfering function provided by the present utility model enables the chamfering cutter 330 to perform vibration cutting under the action of the cutting assembly 300 when moving along the feeding direction, thereby ensuring the flatness of the cutting section, avoiding the occurrence of chipping and damage to materials, and further improving the cutting quality of materials.

[0054] Preferably, the eccentric shaft structure includes an eccentric shaft 340 nested and connected to the output end of the cutting motor 320, and the eccentric shaft 340 is arranged in a stepped shape. Among them, a first shaft section 341, a second shaft section 342, a third shaft section 343, and a fourth shaft section 344 are arranged along the axis direction of the eccentric shaft 340. The first shaft section 341, the second shaft section 342, and the fourth shaft section 344 are coaxially arranged. The axis of the third shaft section 343 is parallel to the axis of the first shaft section 341, forming an eccentric shaft section. The fourth shaft section 344 is a balancing structure. A first bearing 345 and a second bearing 346 are nested on the first shaft section 341 and the third shaft section 343 respectively. The first bearing 345 is nested and fitted with the housing 310.

[0055] Further preferably, the eccentric shaft structure includes a connecting rod 350 nested and fitted with the second bearing 346. The connecting rod 350 includes a first coupling sleeve 351 and a second coupling sleeve 352 spliced vertically along the output direction perpendicular to the cutting motor 320. Among them, a first arc-shaped groove 3511 and a second arc-shaped groove 3521 are respectively arranged on the first coupling sleeve 351 and the second coupling sleeve 352. A through groove nested and fitted with the second bearing 346 is formed by splicing between the first arc-shaped groove 3511 and the second arc-shaped groove 3521. The first coupling sleeve 351 and the second coupling sleeve 352 are connected by fasteners, or the connecting rod 350 is integrally arranged, and a through groove nested and fitted with the second bearing 346 is arranged on the connecting rod 350.

[0056] Further preferably, the eccentric shaft structure includes a sliding seat 360. The sliding seat 360 is connected to the second coupling sleeve 352 by a connecting shaft 361, and a third bearing 362 is nested on the connecting shaft 361. Among them, a washer 363 is arranged between the third bearing 362 and the second coupling sleeve 352. One end of the sliding seat 360 is nested and fitted with the third bearing 362, and the connection between the sliding seat 360, the connecting shaft 361, and the second coupling sleeve 352 is completed by fasteners. The bevel cutter 330 is installed at the other end of the sliding seat 360.

[0057] Further preferably, an obliquely arranged strip groove 364 is arranged on the sliding seat 360, and the bevel cutter 330 is embedded in the strip groove 364. The bevel cutter 330 is pressed between the sliding seat 360 and the blade pressing plate 365 by the blade pressing plate 365, and the connection between the sliding seat 360 and the blade pressing plate 365 is completed by fasteners.

[0058] Preferably, a sliding structure is further arranged between the sliding seat 360 and the inner wall of the housing 310. The sliding structure includes a slide rail 370 arranged on the inner wall of the housing 310, and a slider 380 connected to the sliding seat 360 and slidably fitted with the slide rail 370. Among them, through the sliding fit between the slider 380 and the slide rail 370, the reciprocating movement of the bevel cutter 330 is realized.

[0059] Preferably, the cutting assembly 300 is rotatably connected to the housing 310, and an adjusting portion 400 and a rotating portion 500 are provided between the cutting assembly 300 and the housing 310. Among them, the angle of the diagonal cutting knife 330 in the vertical plane is changed through the adjusting portion 400, and the rotating portion 500 serves as the rotating support when the angle of the diagonal cutting knife 330 in the vertical plane is adjusted.

[0060] More preferably, the adjusting portion 400 includes an adjusting rod 410, one end of which is connected to the housing 310 and the other end is inserted and matched with the arc-shaped slot 420 on the bracket 200. Among them, a fastening nut 430 is screwed on the end of the adjusting rod 410 that forms an insertion fit with the arc-shaped slot 420. When the angle of the diagonal cutting knife 330 in the vertical plane is adjusted, the current angle of the diagonal cutting knife 330 is locked by the fastening nut 430.

[0061] More preferably, the rotating portion 500 includes a rotating seat 510 arranged in an L shape, and one end of the rotating seat 510 is connected to the housing 310 through a fastener, and the other end of the rotating seat 510 is rotatably connected to the bracket 200 through a rotating rod 520. Among them, the rotating rod 520 rotatably connected to the bracket 200 on the rotating seat 510 can be a rivet.

[0062] Preferably, an installation sleeve 110 is connected to the output end of the rotating assembly 100, and a slip ring 120 is installed at one end of the installation sleeve 110 close to the bracket. The two ends of the slip ring 120 along its axis are respectively a fixed end 121 and a movable end 122. Among them, the movable end 122 is connected to the installation sleeve 110, the installation sleeve 110 is connected to the bracket, and the wire 130 on the fixed end 121 is electrically connected to the circuit board 140 in the rotating assembly 100 through the internal space of the installation sleeve 110, and the wire 130 on the movable end 122 is electrically connected to the cutting motor 320.

[0063] It is worth mentioning that through the slip ring 120, the electrical connection between the circuit board 140 and the cutting motor 320 is divided into two parts. One section of the wire 130 is located between the fixed end 121 of the slip ring 120 and the circuit board 140, and the other section of the wire 130 is located between the movable end 122 of the slip ring 120 and the cutting motor 320. Although the wire 130 is divided into two parts, the two sections of the wire 130 can still be guaranteed to be in an electrically connected state through the slip ring 120.

[0064] In this embodiment, when the wire 130 on the circuit board 140 is directly electrically connected to the cutting motor 320, since the movement locus of the output end of the rotating assembly 100 is circumferential rotation, the wire 130 will often be in a twisted state. After long-term repeated twisting, the connection between the wire 130 and the circuit board 140 will become detached, thus affecting the reliability of the entire cutting head. By splitting the wire 130 into two, it is ensured that the wire 130 between the fixed end 121 of the slip ring 120 and the circuit board 140 is always in a fixed state when the cutting head rotates. The movable end 122 of the slip ring 120 rotates synchronously with the cutting motor 320. Therefore, the orientation between the movable end 122 of the slip ring 120 and the cutting motor 320 also remains in a fixed state relative to each other, thus avoiding the twisting of the wire 130 and further improving the reliability of the cutting head.

[0065] It should be noted that in the present utility model, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0066] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0067] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. A cutting head with a chamfering function, characterized in that Comprising: A rotating assembly, the output end of which is connected with a bracket, and the bracket can be driven by the rotating assembly to rotate circumferentially; A cutting assembly, movably connected to one end of the bracket, and the cutting assembly includes: A housing, which is hollow inside; A cutting motor, installed on the housing, and the output end of the cutting motor extends into the housing; An eccentric shaft structure, one end of which is connected to the output end of the cutting motor, and the other end is provided with an inclined cutting tool. The inclined cutting tool is driven by the cutting motor through the eccentric shaft structure to reciprocate, realizing the vibration cutting of materials; A balance structure, located at the end of the eccentric shaft structure connected to the cutting motor. When the cutting motor drives the eccentric shaft to rotate, the balance structure is synchronously driven to rotate, reducing the vibration caused by eccentricity.

2. The cutting head with a chamfering function according to claim 1, characterized in that, The eccentric structure includes: An eccentric shaft, one end of which is nestedly connected to the output end of the cutting motor, and the other end is provided with an eccentric shaft section; A connecting rod, one end of which is nestedly connected to the eccentric shaft section on the eccentric shaft, and the other end is provided with a connecting shaft; A sliding seat, one end of which is nestedly connected to the connecting shaft, and the connection between the sliding seat, the connecting shaft and the connecting rod is completed through fasteners. Wherein, the inclined cutting tool is installed at the other end of the sliding seat.

3. The cutting head with a chamfering function according to claim 2, characterized in that The eccentric shaft is arranged in a stepped shape, and a first shaft section, a second shaft section, a third shaft section and a fourth shaft section are sequentially arranged along the output direction of the cutting motor. The third shaft section is the eccentric shaft section, and the fourth shaft section is the balance structure. The first shaft section, the second shaft section and the fourth shaft section are coaxially arranged. Wherein, a first bearing and a second bearing are nested on the first shaft section and the eccentric shaft section respectively, and the first shaft section is nested and matched with the housing, and the second bearing is nested and matched with the connecting rod.

4. The cutting head with a chamfering function according to claim 3, characterized in that, The connecting rod includes a first connecting shaft sleeve and a second connecting shaft sleeve which are spliced up and down along a direction perpendicular to the output direction of the cutting motor, and a first arc-shaped groove and a second arc-shaped groove are respectively arranged on the first connecting shaft sleeve and the second connecting shaft sleeve. A through groove nested and matched with the second bearing is formed by the splicing between the first arc-shaped groove and the second arc-shaped groove, and the first connecting shaft sleeve and the second connecting shaft sleeve are connected through fasteners, or the connecting rod is integrally arranged, and a through groove nested and matched with the second bearing is arranged on the connecting rod.

5. The cutting head with beveling function according to claim 2, characterized in that, A third bearing is nested on the connecting shaft, and a washer is arranged between the third bearing and the connecting rod. Wherein, one end of the sliding seat is nested and matched with the third bearing, and the connection between the sliding seat, the connecting shaft and the connecting rod is completed through fasteners, and the inclined cutting tool is installed at the other end of the sliding seat.

6. The cutting head with beveling function according to claim 2, characterized in that, An inclined slot is arranged on the sliding seat, and the inclined cutting tool is embedded in the inclined slot. The inclined cutting tool is pressed between the sliding seat and the blade pressing plate through the blade pressing plate, and the connection between the sliding seat and the blade pressing plate is completed through fasteners.

7. The cutting head with a chamfering function according to claim 2, characterized in that, A sliding structure is further arranged between the sliding seat and the inner wall of the housing, and the sliding structure includes a slide rail arranged on the inner wall of the housing, and a slider connected to the sliding seat and slidably matched with the slide rail. Wherein, through the sliding match between the slider and the slide rail, the reciprocating movement of the inclined cutting tool is realized.

8. The cutting head with a chamfering function according to any one of claims 1 to 7, characterized in that, The cutting component is rotatably connected to the housing, and an adjusting part and a rotating part are arranged between the cutting component and the housing. Among them, the angle of the bevel cutter in the vertical plane is changed through the adjusting part, and the rotating part serves as the rotating support when the angle of the bevel cutter in the vertical plane is adjusted; or the adjusting part includes an adjusting rod, one end of which is connected to the housing, and the other end is inserted and matched with the arc-shaped slot on the bracket. Among them, a fastening nut is screwed on the end of the adjusting rod that forms an insertion fit with the arc-shaped slot; the rotating part includes a rotating seat, and one end of the rotating seat is connected to the housing through a fastener, and the other end of the rotating seat is rotatably connected to the bracket through a rotating rod.

9. The cutting head with a chamfering function according to any one of claims 1 to 7, characterized in that The output end of the rotating component is connected with a mounting sleeve, and a slip ring is installed at one end of the mounting sleeve close to the bracket. The two ends of the slip ring along its axis direction are respectively a fixed end and a movable end. Among them, the movable end is connected to the mounting sleeve, the mounting sleeve is connected to the bracket, and the wire on the fixed end is electrically connected to the circuit board in the rotating component through the internal space of the mounting sleeve, and the wire on the movable end is electrically connected to the cutting motor.

10. A cutting device, characterized in that, It includes the cutting machine head with bevel cutting function according to any one of claims 1 to 9.

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