Pair of pliers with scale and method for fixing tension member

Abstract

To provide a pair of pliers with a scale which is easy to use as pliers for fixing a tension member in an optical closure when connecting an optical fiber cable.SOLUTION: A pair of pliers with a scale comprises: a pair of hold portions 11 to be held with one of the hold portions placed with a thumb and the other placed with fingers other than the thumb; a pin shaft portion 13 for rotatably connecting the pair of hold portions; grip portions 14 each provided at a tip of each hold portion; cut portions 15 each provided between the grip portion 14 and the pin shaft portion 13; and a scale portion 12 provided over an entire length on a front side of either one of the pair of hold portions 11. Therein: the hold portion is formed so that the entire length is a predetermined value of a length of a slot or a default value within the range thereof; the scale portion provided over the entire length of the hold portion is used when the length of the slot is measured to determine whether or not the length is the predetermined value; and each of parts in front of and behind the pin shaft portion, of the scale portion is used when a length of a sheath peeling part of a tip of the slot is measured to determine whether or not the length is a predetermined value.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to graduated pliers used for fixing a tension member in an optical closure or an optical termination box (hereinafter simply referred to as an optical closure) when connecting optical fiber cables, and a method for fixing a tension member. [Background technology]

[0002] When connecting an optical fiber cable, the optical fiber cable is cut, the coating at the cut portion is stripped to take out the optical fiber and the slot, the tip of the slot is stripped to take out the tension member, the tension member is fixed in the optical closure, and the excess length of the optical fiber is stored in the optical closure.

[0003] When fixing the tension member in this optical closure, a ruler and pliers are used. The length of the slot is measured with the ruler, and the slot is cut with the pliers so that the slot length is a specified value. Then, the length of the portion to be stripped at the tip of the slot is measured with the ruler, and the tension member is taken out by stripping the portion to be stripped at the tip to the specified length, and the tension member is fixed to the tension member attachment point.

[0004] In this way, when fixing the tension member in the optical closure, a ruler and pliers are required, and the work requires switching between the ruler and the pliers, which is time-consuming.

[0005] In response to this, there is a device that integrates a ruler with a scale onto the pliers, eliminating the need to switch from the pliers to a ruler when cutting electric wires in electrical work, etc., making it possible to easily measure the length of and cut electric wires without letting go of the pliers (for example, Figure 6 of Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2006-180918 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the case of Patent Document 1, although the pliers have a ruler with graduations, the ruler is only provided on a part of the gripping part, so in order to measure the length of the slot or the length of the skin stripping part at the tip of the slot, the part with the ruler must be moved to the measurement point, which is the slot or the skin stripping part at the tip of the slot.As a result, it is necessary to change hands of the pliers, making it difficult to use.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a pair of graduated pliers which are easy to use as pliers for fixing a tension member within an optical closure when connecting an optical fiber cable, and a method for fixing a tension member. [Means for solving the problem]

[0009] The graduated pliers according to the invention of claim 1 are graduated pliers used for stripping the coating of an optical fiber cable to take out the optical fiber and the slot, stripping the tip of the slot to fix the tension member taken out, and cutting the length of the slot so that the length of the stripped part of the tip of the slot is a predetermined value in fixing the tension member in an optical closure that stores an excess length of the optical fiber, the graduated pliers comprising a pair of gripping parts to be held by placing a thumb on one side and a finger other than the thumb on the other side, and a pair of gripping parts to be held by placing a thumb on one side and a finger other than the thumb on the other side, the pin shank portion rotatably connecting the pair of gripping portions, a gripping portion provided at the tip of the gripping portion, a cutting portion provided between the gripping portion and the pin shank portion, and a scale portion provided along the entire length on the front side of one of the pair of gripping portions, the entire length of the gripping portion being formed to a predetermined value of the length of the slot or a preset value within that range, the scale portion provided along the entire length of the gripping portion being used to measure whether the length of the slot is the predetermined value, and the scale portions before and after the pin shank portion of the gripping portion being used to measure whether the peeled length of the tip of the slot is the predetermined value.

[0010] The scaled pliers according to the invention of claim 2 are the invention of claim 1, characterized in that the scale portion is provided over the entire length of one of the side surfaces of the pair of gripping portions.

[0011] A method for fixing a tension member according to the invention of claim 3 includes cutting an optical fiber cable to be connected using the graduated pliers described in claim 1 or claim 2 to remove the optical fiber and the slot, measuring a point where the length of the slot is a predetermined value with the graduated portion of the graduated pliers, cutting the slot at that point, measuring a point where the length of the portion to be stripped at the tip of the slot is a predetermined value with the graduated portions in front of and behind the pin shaft portion of the holding portion, stripping the coating from the point where the length of the portion to be stripped at the tip of the slot is the predetermined value to the tip, removing the tension member, attaching the removed tension member to a tension member fixing base in the optical closure, and fixing the tension member of the optical fiber cable in the optical closure. Effect of the Invention

[0012] According to the invention of claim 1, the entire length of the slot can be measured using the scale part of the entire length of the grip part, so the slot can be cut at a predetermined value. Also, the stripping point at the tip of the slot can be measured using the scale parts in front of and behind the pin shaft part of the grip part, so the stripping can be done at the stripping point at the tip of the slot. Therefore, the work is easy and even a person with little experience can efficiently cut the slot, strip the coating, and fix it to the optical closure.

[0013] According to the invention of claim 2, in addition to the effects of the invention of claim 1, the scale portion is provided along the entire length of the side surface of one of the pair of gripping portions, so that the length of the slot and the length of the skin peeled off at the tip of the slot can be measured more easily and quickly.

[0014] According to the invention of claim 3, by using the graduated pliers of claim 1 or 2, the slot can be cut so that the length of the slot is a predetermined value, and the stripped portion of the slot can be stripped so that the length of the stripped portion is a predetermined value, so that the stripped tension member can be easily fixed in the optical closure. Therefore, the tension member can be efficiently fixed in the optical closure when connecting the optical fiber cable. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is a plan view of a pair of scaled pliers according to an embodiment of the present invention. [Diagram 2] 1 is a perspective view of the first half of a procedure for removing an optical fiber and a slot from an optical fiber cable and processing the slot using a pair of scaled pliers according to an embodiment of the present invention. FIG. [Diagram 3] FIG. 3 is a perspective view of a second half of the procedure for processing the slot after FIG. 2 . [Figure 4] 1 is a perspective view of a tension member fixing base portion in an optical closure when working with a pair of scaled pliers according to an embodiment of the present invention; FIG. [Diagram 5] 4 is a flowchart showing the steps of a tension member fixing method according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An embodiment of the present invention will be described below. The graduated pliers according to the embodiment of the present invention are used for connecting optical fiber cables. That is, they are used for processing the slot when the optical fiber and the slot extracted by stripping the coating of the optical fiber cable are stored in an optical closure. In particular, the graduated pliers are suitable for cutting the slot so that the length of the slot is a predetermined value, stripping the tip of the slot to extract the tension member, and fixing the tension member in the optical closure.

[0017] FIG. 1 is a plan view of a scaled pliers according to an embodiment of the present invention. A pair of gripping portions 11a and 11b of the scaled pliers 10 are held by placing the thumb on one gripping portion 11a and the fingers other than the thumb on the other gripping portion 11b. A scale portion 12 is provided on the front side of one of the pair of gripping portions 11a and 11b over the entire length. FIG. 1 shows a case where the scale portion 12 is provided on one gripping portion 11a. The pair of gripping portions 11a and 11b are rotatably connected by a pin shaft portion 13. A gripping portion 14 is provided at the tip of the pair of gripping portions 11a and 11b, and a cutting portion 15 is provided between the tip of the pair of gripping portions 11a and 11b and the pin shaft portion 13.

[0018] The scaled pliers 10 according to the embodiment of the present invention are pliers that have a scale portion 12 over the entire length of one of the gripping portions 11a of commercially available pliers. The default length of the gripping portion 11 of commercially available pliers is 20 cm or 18.5 cm, while the default value of the slot length is usually 20 cm. As a result, the overall length of the gripping portion 11 of the scaled pliers 10 according to the embodiment of the present invention is formed to the default value of the slot length (20 cm) or a default value within that range (18.5 cm). FIG. 1 shows the scaled pliers 10 with the gripping portion 11 having a length of 20 cm. In other words, the end of the scale portion 12 of the gripping portion 11 on the rear end side of the pin shaft portion 13 is marked as 200.

[0019] Meanwhile, the scale portions 12 of the grip portion 11 in front of and behind the pin shaft portion 13 (the scale portions 12 of the grip portion 11 on the tip side) are used to measure the length from the tip of the slot that is to be stripped in order to remove the tension member from the slot, and to measure whether the length of the tip of the slot is a predetermined value. The predetermined value of the length of the tip of the slot is usually about 6 cm. The slot is stripped from the tip of the slot to the point where the stripping length is the predetermined value (6 cm).

[0020] In this way, by using the graduated pliers according to the embodiment of the present invention, the work is easy to perform, and even young workers or inexperienced workers or other people with little experience can efficiently cut slots, strip the coating, and attach it to an optical closure, optical termination box, etc.

[0021] In the above explanation, the scale portion 12 is provided on the front side of the grip portion 11, but the scale portion 12 may be provided on the side in addition to the front side of the grip portion 11. In this case, the length of the slot and the length of the skin peeled off at the tip of the slot can be measured not only by the scale portion 12 on the front side but also by the scale portion 12 on the side side, so that the length of the cut portion of the slot and the length of the skin peeled off at the tip of the slot can be measured more easily and quickly.

[0022] FIG. 2 is a perspective view of the first half of the procedure for removing optical fiber 17 and slot 18 from optical fiber cable 16 and processing slot 18 using graduated pliers 10 according to an embodiment of the present invention, and FIG. 3 is a perspective view of the second half of the procedure for processing slot 18 after FIG. 2.

[0023] First, as shown in Fig. 2(a), the coating of the optical fiber cable 16 is stripped, and the optical fibers 17 and the slots 18 are separated and removed. Fig. 2(a) shows a state in which the scaled pliers 10 are placed on a workbench 19, the slots 18 are removed to the left of Fig. 2(a), and the optical fibers 17 are removed to the right of Fig. 2. Also, the case in which three optical fibers 17 are removed from the optical fiber cable 16 is shown.

[0024] Next, the length of the slot 18 is measured. As shown in Fig. 2(b), the scale portion 12 of the gripping portion 11 of the scaled pliers 10 is used to measure whether the length of the slot 18 is a predetermined value (20 cm).

[0025] As shown in Fig. 2(c), the portion where the length of the slot 18 is a predetermined value (20 cm) is cut by the cutting portion 15 of the graduated pliers 10. Then, as shown in Fig. 2(d), the portion where the length of the portion to be peeled at the tip of the slot 18 is the predetermined value (6 cm) is measured by the graduated portions 12 of the gripping portion 11 in front of and behind the pin shank 13 of the graduated pliers 10 (the graduated portions 12 of the gripping portion 11 on the tip side).

[0026] Next, as shown in Fig. 3(e), a cut is made using the graduated pliers 10 at a location where the length of the portion to be stripped at the tip of the slot 18 is a predetermined value. Then, as shown in Fig. 3(f), the coating is stripped from the cut to the tip of the slot 18, and the tension member 20 of the slot 18 is removed as shown in Fig. 3(g). Fig. 3(h) shows the state where the length of the tension member 20 of the slot 18 is measured using the graduated portion 12 of the gripping portion 11 on the rear end side of the graduated pliers 10. This allows confirmation as to whether the length of the portion to be stripped at the tip of the slot 18 is a predetermined value.

[0027] Fig. 4 is a perspective view of the tension member fixing base part in the optical closure when working with the graduated pliers according to the embodiment of the present invention. After processing the slots 18 shown in Figs. 2 and 3, the tension members 20 that have been stripped and removed from the tip of the slots 18 are attached to the tension member fixing base 21 of the optical closure. Fig. 4 shows a case where the tension members that have been stripped and removed from the tip of the slots 18 that have been removed from three optical fiber cables 16 are attached to the tension member fixing base 21. Also shown is a case where three optical fibers 17 are pulled out from each of the optical fiber cables 16.

[0028] According to the scaled pliers of the embodiment of the present invention, the scale portion 12 is provided over the entire length of the gripping portion 11 of commercially available pliers, so that the length of the slot 18 can be measured using the scale portion 12 provided over the entire length of the gripping portion 11, and whether or not the length of the slot 18 is a predetermined value can be determined. Also, the scale portion 12 of the gripping portion 11 on the tip side of the pin shaft portion 13 can be used to measure the length from the tip of the slot 18, and whether or not the stripped length of the slot 18 is a predetermined value can be determined. In this way, the work is easy to perform, and even a person with little experience, such as a young worker or an inexperienced person, can efficiently cut the slot, strip the coating, and fix it to an optical closure, an optical termination box, etc.

[0029] In the above explanation, the scaled pliers 10 with the preset length of the gripping portion 11 being 20 cm have been described, but the scaled pliers 10 with the preset length of the gripping portion 11 being 18.5 cm can also be used. In this case, the preset length of the gripping portion 11 of commercially available pliers is 1.5 cm shorter than the preset length of the slot 18 being 20 cm, but the preset length of the gripping portion 11 (18.5 cm) is measured using the scaled portion 12 of the gripping portion 11, and the length of the portion where the tension member 16 protrudes from the rear end of the scaled portion 12 of the gripping portion 11 is measured by visual inspection by 1.5 cm. Thus, the preset length of the slot 18 being 20 cm can be measured by the scaled portion 12 of the gripping portion 11 and by visual inspection. Since the measurement accuracy of the length of the slot 18 is not required to be strict, visual measurement of about 1.5 cm is permitted.

[0030] 5 is a flow chart showing the steps of a tension member fixing method according to an embodiment of the present invention. The optical fiber cables to be connected are cut using the graduated pliers described in claim 1 or claim 2, and the optical fibers and the slots are taken out (S1). The coating of the optical fiber cable 16 at the cut portion of the cut optical fiber cable is stripped, and the optical fiber 17 and the slot 18 are separated and taken out.

[0031] Next, the point where the length of the slot is a predetermined value (20 cm) is measured with the scale of the graduated pliers (S2), and the slot is cut at that point (S3).

[0032] After cutting the slot, the point where the length of the portion to be stripped at the tip of the slot is a predetermined value is measured with the scale of the scaled pliers (S4). Since the predetermined value of the length of the portion to be stripped at the tip of the slot is 6 cm, the measurement is made from the tip of the slot up to 6 cm.

[0033] Then, the coating is stripped from the point where the length of the stripped portion at the tip of the slot is a predetermined value to the tip to remove the tension member (S5), and the removed tension member of the slot is attached to a tension member fixing base inside the optical closure (S6).

[0034] According to the tension member fixing method of the embodiment of the present invention, by using the graduated pliers of the embodiment of the present invention, the length of the slot can be measured using the graduated portion of the entire length of the gripping portion, so that the point where the length of the slot is a predetermined value can be measured and the slot can be cut at that point. Also, the length of the skinned portion of the slot can be measured using the graduated portion on the tip side of the gripping portion, so that the predetermined value of the length of the skinned portion of the slot can be measured and the skin of the slot can be stripped at that part. This makes it possible to easily fix the slot in the optical closure and efficiently fix the slot in the optical closure when connecting the optical fiber cable.

[0035] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0036] 10: graduated pliers, 11: gripping portion, 12: graduated portion, 13: pin shaft portion, 14: gripping portion, 15: cutting portion, 16: optical fiber cable, 17: optical fiber, 18: slot, 19: work table, 20: tension member, 21: tension member fixing base

Claims

1. a pair of graduated pliers used for stripping the coating of an optical fiber cable to take out the optical fiber and the slot, stripping the tip of the slot to fix the tension member taken out, and cutting the length of the slot to a predetermined value and stripping the length of the stripped portion of the tip of the slot to a predetermined value when fixing the tension member in an optical closure that stores an excess length of the optical fiber, A pair of gripping parts for holding the device by hooking a thumb on one side and fingers other than the thumb on the other side; A pin shaft portion that rotatably connects the pair of gripping portions; A gripping portion provided at a tip end of the gripping portion; a cutting portion provided between the gripping portion and the pin shaft portion; A scale portion is provided on a front side of one of the pair of grip portions over the entire length, the overall length of the gripping portion is formed to a predetermined value that is equal to or falls within a range of the length of the slot; the scale portion provided along the entire length of the grip portion is used to measure whether the length of the slot is a predetermined value; A pair of scaled pliers, characterized in that the scale portions on the front and rear of the pin shaft portion of the gripping portion are used to measure whether the peeled length of the tip portion of the slot is a predetermined value.

2. 2. The pliers with scale according to claim 1, wherein the scale portion is provided over the entire length of a side surface of one of the pair of gripping portions.

3. Using the scaled pliers according to claim 1 or 2, the optical fiber cable to be connected is cut and the optical fiber and the slot are taken out; measuring the point where the length of the slot is a predetermined value with the scale portion of the graduated pliers; Cutting the slot at that location; The length of the stripped portion at the tip of the slot is a predetermined value. Measure the scale portion at the front and rear of the pin shaft portion of the grip portion, The coating is stripped from a point where the length of the stripped portion at the tip of the slot is a predetermined value to the tip, and the tension member is taken out. The tension member is attached to a tension member fixing base in the optical closure; A method for fixing a tension member, comprising the steps of: fixing the tension member of the optical fiber cable within the optical closure.

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