Dividing jig and dividing method for sheet member

Abstract

To provide a dividing jig and a dividing method that are simple yet highly versatile and capable of dividing a sheet member accurately at a desired ratio.SOLUTION: A dividing method for a sheet member includes: connecting a holding part 2 attached to one end of a main body 4 in a longitudinal direction and the main body 4 so as to be rotatable around a pivot part 3; providing a positioning part 4a at the other end of the main body 4 in the longitudinal direction; providing a mark 6 at a position where a straight line 5 connecting the pivot part 3 and the positioning part 4a is divided at a desired ratio; setting a length L of a line segment 5 connecting straight the pivot part 3 to the positioning part 4a to be greater than an overall width W of a sheet member S; positioning the pivot part 3 at one end S1 of the sheet member S in a width direction by the holding part 2; using each mark 6 as an indicator for dividing the sheet member S at a desired ratio by aligning the positioning part 4a with an other end S2 of the sheet member S by rotating the main body 4 around the pivot part 3.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a dividing jig and a dividing method for a sheet member, and more particularly to a dividing jig and a dividing method that are simple yet highly versatile and can divide a sheet member into desired proportions with high accuracy. [Background technology]

[0002] Various sheet members are used when manufacturing rubber products such as tires. At the manufacturing site, wide sheet members (raw sheet rolls) are divided into desired widths for use (see, for example, Patent Document 1). If there is a large error in the divided width from the desired width, it will adversely affect the quality of products manufactured using the divided sheet members, so it is necessary to divide the sheet members into the desired widths with high precision.

[0003] Patent Document 1 proposes a device for dividing a sheet member in which a large number of tire cords are embedded into a predetermined number of tire cords. This device includes a white chalk line drawing means, a counting means for detecting the white marks, a laser irradiation means for irradiating a predetermined number of white marks with a colored laser, and a floating knife for cutting the sheet member into a predetermined number of tires. Therefore, this proposal makes the device complicated and requires a corresponding facility cost. In addition, this proposed device does not function sufficiently unless the tire cords are embedded in the sheet member, so it cannot be applied to sheet members in which the tire cords are not embedded. Therefore, there is room for improvement in dividing various types of sheet members into desired ratios with high accuracy while being simple. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2013-159075 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a dividing jig and a dividing method which are simple yet highly versatile and capable of dividing a sheet member accurately into desired proportions. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the sheet member dividing jig of the present invention is a sheet member dividing jig for dividing a sheet member at a desired ratio, and has a main body portion extending in one direction, a holding portion attached to one longitudinal end portion of the main body portion, and a pivot portion which rotatably connects the holding portion and the main body portion, and the main body portion has an alignment portion at the other longitudinal end portion thereof, and a line segment connecting the pivot portion and the alignment portion in a straight line has a marker at the position where it is divided at the desired ratio, and the length of the line segment is set to be greater than or equal to the overall width of the sheet member.

[0007] The method for dividing a sheet member of the present invention is a method for dividing a sheet member using the above-mentioned sheet member dividing jig, and is characterized in that the pivot point portion is positioned and installed at one end of the width direction of the sheet member by the holding portion, the main body portion is rotated on the surface of the sheet member around the pivot point portion to bring the alignment portion into alignment with the other end of the sheet member, and each of the marks is used as an indicator when dividing the sheet member in the desired ratio. Effect of the Invention

[0008] According to the present invention, when the pivot part is positioned and installed at one end in the width direction of the sheet member by the holding part, and the main body part is rotated on the surface of the sheet member around the pivot part to bring the alignment part into alignment with the other end of the sheet member, each of the marks is disposed at a position where the entire width of the sheet member is divided at the desired ratio. Therefore, by using each of the marks as an index, it becomes possible to divide the sheet member precisely at the desired ratio.

[0009] This dividing jig is simple and not complicated in structure, and has high versatility because it can precisely divide various types of sheet members into desired ratios, regardless of whether the sheet members have cords embedded therein. [Brief description of the drawings]

[0010] [Figure 1] 1A and 1B are explanatory diagrams illustrating an embodiment of a dividing jig for a sheet member and a sheet member according to the present invention in plan view. [Diagram 2] 2 is an explanatory diagram illustrating the dividing jig and the sheet member of FIG. 1 as viewed from the front. [Diagram 3] 2 is an explanatory diagram illustrating a state in which the dividing jig in FIG. 1 is placed on a sheet member. FIG. [Figure 4] 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] 4 is an explanatory diagram illustrating a state in which the main body is rotated about the pivot point in FIG. 3 so that the alignment portion is aligned with the other end of the sheet member. FIG. [Figure 6] 6 is an explanatory diagram illustrating a sheet member having marks applied thereto using the marks in FIG. 5 as indicators; [Figure 7] 7 is an explanatory diagram illustrating a state in which a cutting tool is placed at positions corresponding to the marks in FIG. 6 and a sheet member is cut. FIG. [Figure 8] 13 is an explanatory diagram illustrating another embodiment of the dividing jig in a plan view. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a dividing jig and a dividing method for a sheet member according to the present invention will be described based on the embodiments shown in the drawings.

[0012] The embodiment of the sheet member dividing jig 1 illustrated in Figures 1 and 2 is used when dividing the entire width of the sheet member S into desired ratios. The X arrow, Y arrow, and Z arrow in the figures indicate the width direction, length direction, and thickness direction of the sheet member S to be divided, respectively.

[0013] The sheet member S is formed, for example, from unvulcanized rubber, vulcanized rubber, resin, paper, etc. The size of the sheet member S varies depending on the material, etc., but the total width W is, for example, from 0.5 m to 2 m, the total length is greater than the total width W (for example, from several meters to 500 m), and the thickness is, for example, from 0.5 mm to 2.5 mm. In the case of a sheet member S formed from unvulcanized rubber, the total width W is, for example, from 1 m to 1.5 m, and the thickness is, for example, from 1 mm to 2 mm.

[0014] In this sheet member S, a large number of cords f are embedded at intervals in the width direction, and each cord f extends in the longitudinal direction. As the cords f, fiber cords or metal wires (steel wire cords) are used. The outer diameter of the cords f is, for example, 0.1 mm or more and 1.0 mm or less, more preferably 0.4 mm or more and 0.9 mm or less. As the material for the fiber cords, various known resins such as polyester, aramid, rayon, etc. are used. The cords f have a twisted structure in which, for example, 2 to 4 filaments are twisted, and may be monofilaments. In some cases, the cords f are not embedded in the sheet member S.

[0015] The dividing jig 1 has a main body 4 extending in one direction, a holding part 2 attached to one longitudinal end of the main body 4, and a pivot part 3 that rotatably connects the holding part 2 and the main body 4. In this embodiment, the dividing jig 1 is set so that the entire width of the sheet member S can be divided into four equal parts at a desired ratio.

[0016] The main body 4 may be a flat plate or rod extending linearly in one direction. The main body 4 may be made of, for example, metal (general steel, stainless steel, aluminum, aluminum alloy, etc.) or hard resin. The thickness of the main body 4 varies depending on the material, but is, for example, about 2 mm to 5 mm. An alignment portion 4a is formed at the other end in the longitudinal direction of the main body 4. In this embodiment, the other end in the longitudinal direction of the main body 4 is tapered to a point in a plan view, and the tip of the point serves as the alignment portion 4a.

[0017] The holding part 2 fixes the pivot part 3 to a predetermined position on the sheet material S. The holding part 2 has two clamping plates 2a, 2a and a biasing member 2b installed between them. One clamping plate 2a (upper clamping plate 2a in FIG. 2) is a simple flat plate, while the other clamping plate 2a (lower clamping plate 2a in FIG. 2) is a plate-like body bent midway. One end portion (right end portion in FIG. 2) of the clamping plates 2a, 2a abuts against each other by a biasing force of the biasing member 2b. When the other end portions (left end portion in FIG. 2) of the clamping plates 2a, 2a are moved so as to approach each other, one end portion of the clamping plates 2a, 2a moves away from each other in the direction shown by the arrow in FIG. 2 against the biasing force of the biasing member 2b. That is, the holding part 2 has a structure similar to that of a general clip. A torsion spring is used for the biasing member 2b, but various types of springs and elastic materials can be used.

[0018] A shaft-shaped pivot point 3 is fixed to one of the clamping plates 2a. A positioning guide 2c is provided on the lower surface of the one of the clamping plates 2a. The positioning guide 2c is disposed between the lower surface of the one of the clamping plates 2a and the upper surface of the other of the clamping plates 2a.

[0019] The pivot part 3 penetrates one longitudinal end of the main body 4 in the thickness direction and is fixed to one of the clamping plates 2a, and a through hole through which the pivot part 3 penetrates is formed in the main body 4. Therefore, the main body 4 is capable of rotating about the central axis CP of the pivot part 3 in a plan view.

[0020] The main body 4 has a mark 6. The mark 6 is arranged at a position where a line segment 5 connecting the central axis CP of the pivot fulcrum 3 and the alignment portion 4a is divided at a desired ratio. In FIG. 1, the line segment 5 is drawn with a dashed line. The mark 6 may be visible, and may be a simple dot as in this embodiment. The length L of the line segment 5 is set to be equal to or larger than the overall width W of the sheet member S (length L ≧ overall width W). In order to make the dividing jig 1 applicable even if the overall width W of the sheet member S differs to some extent, the length L of the line segment 5 is set to be slightly larger than the overall width W of the widest sheet member S to which the dividing jig 1 is expected to be applied. The line segments 5 do not have to be displayed on the main body 4, and it is sufficient that each of the line segments 5 has a mark 6.

[0021] In this embodiment, since the desired ratio for dividing the sheet member S is four equal parts, the marks 6 are arranged at positions where the line segment 5 is divided into four equal parts. That is, the marks 6 are arranged at positions where the length L of the line segment 5 is equally divided into 0.25L, and thus there are three marks 6.

[0022] In this embodiment, marking portions 7 each consisting of a notch penetrating the main body 4 in the thickness direction are formed at positions corresponding to the marks 6 of the main body 4. The marking portions 7 may be holes penetrating the main body 4 in the thickness direction, and may be provided as desired.

[0023] Next, an example of the procedure for dividing the sheet member S using the dividing jig 1 will be described.

[0024] 3 and 4, the dividing jig 1 is installed at an appropriate position with respect to the sheet member 1 laid flat on a carrier 9 such as a conveyor belt. Then, the pivot point part 3 is positioned and installed at one end S1 in the width direction of the sheet member S by the holding part 2. In this embodiment, one end of the sheet member S protrudes from one end of the carrier 9 in the width direction.

[0025] More specifically, as shown in FIG. 2, the other ends of the clamping plates 2a, 2a (left ends in FIG. 2) are moved closer to each other, and one end of the clamping plates 2a, 2a is moved away from each other against the biasing force of the biasing member 2b. After the sheet material S and one end of the mounting body 9 in the width direction are inserted between the clamping plates 2a, 2a, the one end of the clamping plates 2a, 2a is brought closer to each other by the biasing force of the biasing member 2b. At this time, one end S1 of the sheet material S in the width direction is abutted against the positioning guide 2c. As a result, as shown in FIG. 4, one end of the sheet material S and one end of the mounting body 9 are clamped by the holding part 2, and the pivot part 3 (center axis CP) is positioned and installed at one end S1 of the sheet material S in the width direction. Furthermore, in cases where one end S1 of the sheet material S in the width direction does not protrude from one end of the support body 9 in the width direction, the amount of downward protrusion of the positioning guide 2c from the underside of one of the clamping plates 2a is set to be approximately the same as the thickness of the sheet material S, so that the positioning guide 2c can abut against one end S1 of the sheet material S in the width direction on the support body 9.

[0026] 5, the main body 4 is rotated on the surface of the sheet member S around the pivot fulcrum 3 (central axis CL) to align the alignment portion 4a with the other end S2 of the sheet member S. In this manner, the main body 4 is placed on the sheet member S with the alignment portion 4a aligned with the other end S2. When the alignment portion 4a is aligned with the other end S2, each of the marks 6 is disposed at a position where the overall width W of the sheet member S is divided at a desired ratio. Therefore, by using each of the marks 6 as an index, it becomes possible to divide the sheet member S accurately at a desired ratio.

[0027] For example, when marks P are applied to the surface of the sheet member S with a pen or stamp at positions corresponding to the marks 6 in Fig. 5, the sheet member S will be in the state illustrated in Fig. 6. Since each applied mark P is located at a position that divides the entire width of the sheet member S into four equal parts, it is possible to precisely divide the sheet member S into four parts by cutting the sheet member S in the longitudinal direction by making an incision at each applied mark P.

[0028] In this embodiment, the sheet member S is cut along the cords f between adjacent cords f in the width direction, starting from each mark 6. Specifically, as illustrated in Fig. 7, a cutting tool 8 such as a known cutter is disposed at a width direction position of the sheet member S corresponding to each mark 6 (or given mark 7), and the sheet member S is penetrated in the thickness direction. Next, the conveyor belt, which is the mounting body 9, is caused to travel in the direction of the arrow to move the sheet member S in the longitudinal direction, and the sheet member S is divided and cut into desired proportions by each fixedly disposed cutting tool 8.

[0029] As illustrated in Fig. 6, without providing marks P on the surface of the sheet member S, in the state illustrated in Fig. 5, cuts may be made in the sheet member S at the positions of the marks 6, and the sheet member S may be divided using the cuts as starting points. For example, cutting tools 8 may be installed in advance in the main body 4 at positions corresponding to the marks 6, and the sheet member S may be divided and cut into desired proportions using the respective cutting tools 8 in the state illustrated in Fig. 5.

[0030] In this embodiment, the case where the total width W of the sheet member S is divided into four equal parts in the width direction has been exemplified, but when dividing it into five or six equal parts, or when dividing the area between one end S1 and the other end S2 of the sheet member S in a width dimension ratio of 1:2:3, it is sufficient to provide marks 6 at the positions where the line segment 5 is divided at the desired division ratio. Therefore, the desired ratio at which the sheet member S is divided in the width direction is not particularly limited, and this dividing jig 1 can be used when dividing the sheet member S in the width direction at various desired ratios.

[0031] This dividing jig 1 is simple and not complicated in structure. This dividing jig 1 can precisely divide the sheet member S in a desired ratio, whether the sheet member S has the cord f embedded therein or not. In other words, the dividing jig 1 has high versatility because it can precisely divide various types of sheet members S in a desired ratio.

[0032] In the above embodiment, the main body 4 has the mark 6 at the position where the line segment 5 is divided at one desired ratio, so the sheet material S can be divided only at that desired ratio. Therefore, it is preferable to prepare a main body 4 having the mark 6 at the position where the line segment 5 is divided at another desired ratio. Then, the main body 4 that matches the desired division ratio can be selected, and the main body 4 can be rotatably connected to the holding part 2 by the rotation fulcrum part 3 for use. By replacing only the main body 4 in this way, the sheet material S can be divided accurately at various desired ratios.

[0033] In another embodiment of the dividing jig 1 illustrated in Fig. 8, the marks 6 are provided at positions where the line segment 5 is divided at each desired ratio for each of a plurality of different desired ratios. That is, in addition to the group of marks 6 in the previous embodiment, the main body 4 has marks 6 provided at positions where the line segment 5 is equally divided into five, and each of these marks 6 constitutes another group. That is, the marks 6 are provided at positions where the length L of the line segment 5 is equally divided into 0.2L, and there are four marks 6. Therefore, in this embodiment, the main body 4 has marks 6 provided at positions where the line segment 5 is divided at each ratio for each of 4 and 5 divisions.

[0034] When dividing the overall width W of the sheet member S into five equal parts in the width direction using this dividing jig 1, the marks 6 arranged at the positions dividing the line segment 5 into five equal parts can be used as indicators. Therefore, according to this dividing jig 1, the sheet member S can be divided with high precision into multiple types (two types, three types, etc.) at desired ratios using one main body 4.

[0035] The present disclosure encompasses the following inventions: Invention 1: A sheet member dividing tool for dividing a sheet member at a desired ratio, The device has a main body extending in one direction, a holding part attached to one end of the main body in the longitudinal direction, and a pivot part that rotatably connects the holding part and the main body, The main body portion has an alignment portion at the other longitudinal end thereof, and has a mark at a position where a line segment connecting the pivot point portion and the alignment portion is divided at a desired ratio, and the length of the line segment is set to be greater than or equal to the overall width of the sheet member. Invention 2: A dividing jig for a sheet member as described in invention 1, in which a marking portion consisting of a hole or notch penetrating the main body portion in the thickness direction is formed at a position on the main body portion corresponding to the mark. Invention 3: 3. A sheet member dividing jig as described in claim 1 or 2, wherein the markings are provided at positions where the line segment is divided at each of a plurality of different desired ratios. Invention 4: A method for dividing a sheet member using a dividing jig for a sheet member according to any one of Inventions 1 to 3, comprising: positioning and installing the pivot point portion at one end of the width direction of the sheet member by the holding portion; rotating the main body portion on the surface of the sheet member around the pivot point portion to bring the alignment portion into alignment with the other end of the sheet member; and using each of the marks as an index for dividing the sheet member in the desired ratio. Invention 5: A method for dividing a sheet member as described in Invention 4, in which a number of codes are embedded at intervals in the width direction of the sheet member and extend in the longitudinal direction of the sheet member, marks are made on the surface of the sheet member at the positions of each of the marks that are to be used as indicators, and a cutting tool is installed at each position corresponding to the made marks, and the sheet member is divided in the desired ratio along the codes between adjacent codes in the width direction of the sheet member. [Explanation of symbols]

[0036] 1 Split jig 2 Holding part 2a Holding plate 2b Urging member 2c Positioning guide 3. Swivel support 4 Main body 4a Alignment section 5 Line Segments 6. Landmarks 7 Marking section 8 Cutting tools 9. Placement body S Sheet material f code P Mark given

Claims

1. A sheet member dividing tool for dividing a sheet member at a desired ratio, The device has a main body portion extending in one direction, a holding portion attached to one end of the main body portion in the longitudinal direction, and a pivot portion that rotatably connects the holding portion and the main body portion, The main body portion has an alignment portion at the other longitudinal end thereof, and has a mark at a position where a line segment connecting the pivot point portion and the alignment portion is divided at a desired ratio, and the length of the line segment is set to be greater than or equal to the overall width of the sheet member.

2. 2. The sheet member dividing jig according to claim 1, wherein a marking portion consisting of a hole or a notch penetrating the main body in a thickness direction is formed at a position of the main body corresponding to the mark.

3. 3. The sheet member dividing jig according to claim 1, wherein the marks are provided at positions where the line segment is divided at a plurality of different desired ratios.

4. 2. A method for dividing a sheet member using the dividing tool for a sheet member as described in claim 1, comprising: positioning and installing the pivot point portion at one end of the width direction of the sheet member by the holding portion; rotating the main body portion on the surface of the sheet member around the pivot point portion to bring the alignment portion into alignment with the other end of the sheet member; and using each of the marks as an indicator for dividing the sheet member in the desired ratio.

5. 5. A method for dividing a sheet member as described in claim 4, wherein a number of codes are embedded at intervals in the width direction of the sheet member and extend in the longitudinal direction of the sheet member, marks are applied to the surface of the sheet member at the positions of each of the marks used as indicators, and a cutting tool is installed at each position corresponding to the applied marks to divide the sheet member along the codes between adjacent codes in the width direction of the sheet member in the desired ratio.

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