String fastener and string fastening method

Abstract

To perform fixing / unfixing using a string through simple work.SOLUTION: A string clasping tool 10 comprises a fixed part 1 a base part 2, a first hook part 6 and a second hook part 7. The fixed part 1 can be fixed to another member. The base part 2 extends from the fixed part 1. The first hook part 6 extends while being branched from the base part 2 and a string can be hooked therein. The second hook part 7 extends while being branched from the base part 2 to an opposite side of the first hook part 6 and the string can be hooked therein. A first guide face 6a which is inclined closer to the fixed part 1 side as being away from the base part 2, for guiding the hooked string is formed in the first hook part 6. A second guide face 7a which is inclined closer to the fixed part 1 side as being away from the base part 2, for guiding the hooked string is formed in the second hook part 7.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a string fastener for releasably fastening a string. [Background technology]

[0002] For example, at construction sites, temporary scaffolding is sometimes erected around a building. In many cases, protective sheets are installed vertically on the exterior of this scaffolding to prevent objects from falling from the work floor and building, and to prevent paint from splashing around.

[0003] Because protective sheets have a large surface area that is exposed to the external environment, they can be blown around by strong winds, which can cause the scaffolding to collapse. Therefore, before strong winds from a typhoon or other event act on the protective sheet, it is necessary to ensure that the protective sheet does not cover the periphery of the scaffolding, and then restore the protective sheet after the strong winds have subsided.

[0004] Patent document 1 describes how to secure the sheet horizontally by passing a string through rings drilled vertically at the left and right edges of the sheet, for example at 300m intervals, and then tying this string to the vertical members of the scaffolding (the vertical single pipes in the case of single-pipe scaffolding, or the vertical frame members in the case of frame scaffolding). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-117912 Summary of the Invention [Problem to be solved by the invention]

[0006] In the method of simply tying with a string as described in Patent Document 1, tying and untying the string is time-consuming.

[0007] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a string fastener that allows fastening and unfastening of a string with a simple operation.

[0008] The problem to be solved by the present invention is as described above. Next, the means for solving this problem and the effects thereof will be explained.

[0009] According to a first aspect of the present invention, there is provided a string fastener having the following configuration. Specifically, the string fastener comprises a fixed portion, a base portion, a first hooking portion, and a second hooking portion. The fixed portion can be fixed to another member. The base portion extends from the fixed portion. The first hooking portion branches off and extends from the base portion, and a string can be hung on it. The second hooking portion branches off and extends from the base portion on the opposite side to the first hooking portion, and a string can be hung on it. The first hooking portion is formed with a first guide surface that is inclined so that it approaches the fixed portion as it moves away from the base, and that guides the hung string. The second hooking portion is formed with a second guide surface that is inclined so that it approaches the fixed portion as it moves away from the base, and that guides the hung string. A long and narrow recess is formed on the side farther from the fixed portion than the second guide surface. The longitudinal direction of the recess is substantially parallel to the direction in which the first and second hooks are aligned. The end of the recess in the longitudinal direction farther from the first hook is open.

[0010] This allows the string to be secured to the string fastener while ensuring a certain strength against tension of the string in the direction of extension of the base by hanging the string on the first and second hanging parts. This reduces the effort required to attach and remove the string. In addition, the inclination of the first and second guide surfaces makes it difficult for the hung string to come off the string fastener. With the string placed in the recess and hooked on the first hook, the string can be pulled to easily remove slack. After pulling the string in this way, it becomes easy to handle the string so that it can be hooked on the second hook.

[0013] In the string fastener, it is preferable that a retaining portion is formed in the recess near the open end.

[0014] This makes it difficult for the string to come out of the recess.

[0015] In the string fastener, it is preferable that a through-hole be formed in the fixed portion.

[0016] This allows for a simple configuration for fastening another member to the string fastener.

[0017] In the above-mentioned string fastener, When the other member is a string, to the fixed portion The relevant It is preferable that the location where the string is fixed is offset from the center of the base to the side farther from the second hook portion.

[0018] This allows the fixed portion to effectively receive the pulling force when the string is pulled while it is hung on the first hanging portion.

[0019] The above-mentioned string fastener is preferably used for strings that secure protective sheets to temporary scaffolding.

[0020] This makes it easy to release and re-secure the protective sheet to protect it from strong winds.

[0021] According to a second aspect of the present invention, there is provided a string fastening method using the string fastener described above. That is, this string fastening method includes a first step, a second step, and a third step. In the first step, a string is hung on the first hanging part. In the second step, the tip of the string hung on the first hanging part is pulled in a direction generally along the base part and away from the fixed part. In the third step, the string is hung on the second hanging part.

[0022] This allows the slack in the string to be easily removed by pulling the string in the second step, thus making it easy to achieve strong fixation with the string. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view showing the overall configuration of a string fastener according to an embodiment of the present invention; [Figure 2] FIG. 10 is a perspective view showing the state in which the string is hung on the hook portion of the string fastener. [Figure 3] FIG. 10 is a perspective view showing the state in which the string is hung on the first hanging part. [Figure 4] FIG. 10 is a perspective view showing the state in which the string has been moved toward the second hooking portion. [Figure 5] FIG. 10 is a perspective view showing a state in which the string is hooked on the second hooking portion and the first hooking portion. [Figure 6] FIG. 10 is a perspective view showing the state in which the string is hung on the hook portion. [Figure 7] A front view showing the temporary scaffolding with the protective sheet closed. [Figure 8] FIG. [Figure 9] An enlarged perspective view showing the fixing points where the protective sheet is fixed to the vertical members of the scaffolding. [Figure 10] FIG. 10 is a perspective view showing a modified string fastener. DETAILED DESCRIPTION OF THE INVENTION

[0024] Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing the overall configuration of a string fastener 10 according to one embodiment of the present invention.

[0025] The string fastener 10 shown in FIG. 1 is a device that can fasten a string 11 to it.

[0026] The string fastener 10 includes a fixed portion 1, a base portion 2, a first hook portion 6, a second hook portion 7, and a hook portion 8.

[0027] A member other than the string fastener 10 can be fixed to the fixed part 1. In this embodiment, the fixed part 1 is formed in a circular ring shape. A circular fixing hole 1a is formed in the center of the fixed part 1 so as to penetrate through it.

[0028] In this embodiment, the member fixed to the fixed part 1 is a string 11, which will be described later. In other words, one string 11 is fixed to the fixed part 1 and at the same time, it is also fixed to the base part 2, the first hanging part 6, the second hanging part 7, and the hook part 8. However, a member other than the string 11 may also be fixed to the fixed part 1.

[0029] The base 2 is formed so as to be continuous with the fixed part 1. The base 2 is configured so as to extend in an elongated manner from the fixed part 1. At the tip where the base 2 extends from the fixed part 1, a first hook part 6 and a second hook part 7 are arranged so as to branch out in a roughly T-shape. A string 11 can be wrapped around the periphery of the base 2 at least halfway around.

[0030] The first hanging portion 6 is configured to branch out and extend from the tip of the base portion 2. The first hanging portion 6 is formed to be elongated. The direction in which the first hanging portion 6 extends is perpendicular to the longitudinal direction of the base portion 2 or forms an angle smaller than perpendicular.

[0031] A first guide surface 6a is formed on the first hooking part 6. The first guide surface 6a is inclined so as to approach the fixed part 1 as it moves away from the base part 2.

[0032] The second hanging portion 7 is configured to branch off and extend from the tip of the base portion 2. The second hanging portion 7 is formed to be elongated. The direction in which the second hanging portion 7 extends is perpendicular to the longitudinal direction of the base portion 2 or forms an angle smaller than perpendicular.

[0033] A second guide surface 7a is formed on the second hooking portion 7. Similar to the first guide surface 6a, the second guide surface 7a is inclined so as to approach the fixed portion 1 as it moves away from the base portion 2.

[0034] A hook portion 8 is formed so as to straddle the first hanging portion 6 and the second hanging portion 7. A long and narrow hook groove (recess) 8a is formed in the hook portion 8. The hook groove 8a is arranged on the side farther from the fixed portion 1 than the second guide surface 7a. A string 11, which will be described later, can be held in a hooked state in the hook groove 8a.

[0035] The longitudinal direction of the hook groove 8a is arranged so as to roughly follow the direction in which the first hanging portion 6 and the second hanging portion 7 are aligned. The longitudinal end of the hook groove 8a on the side farther from the first hanging portion 6 is open.

[0036] A sloped protrusion (retaining portion) 8b is formed near the open end of the hook groove 8a. This protrusion 8b makes it difficult for the string 11 to come out of the hook groove 8a. Sloped guide surfaces 8c and 8d are formed around the open end of the hook groove 8a. The guide surfaces 8c and 8d guide the string 11 to the open end of the hook groove 8a, making it easy to insert the string 11 into the hook groove 8a from outside.

[0037] Next, an example of a method for fixing the string 11 to the first hooking portion 6 and the second hooking portion 7 of the string fastener 10 will be described with reference to Figures 2 to 6. In the following description, with respect to the string fastener 10 in Figures 2 to 6, the front side in the drawings may be referred to as the front side, and the back side may be referred to as the back side.

[0038] 2 shows the string fastener 10 with the end of the string 11 fixed to the fixed part 1. Any material can be used as the string 11, but in this embodiment, a polyethylene string is used.

[0039] First, as shown on the right side of FIG. 2, the worker hooks the other end of the string 11 into the hook groove 8a of the hook portion 8 and passes it from the back side to the front side.

[0040] Next, as shown by the bold arrow in Figure 2, the worker hooks the front side portion that has passed through the hook groove 8a onto the first hook portion 6, passes it through the back side of the first hook portion 6, and pulls it in the direction away from the fixed portion 1. This results in the state shown in Figure 3.

[0041] Next, as shown by the bold arrow in Figure 3, the worker crosses the end of string 11 over the string 11 that is being guided through hook groove 8a on the back side of string fastener 10 to pass it through hook groove 8a. Then, the worker pulls the end of string 11 toward fixed part 1 so that it passes through the back side of second hooking part 7. This results in the state shown in Figure 4.

[0042] Next, as shown by the thick arrow in Figure 4, the worker passes the end of string 11 over the front side of base 2 and then over the back side of first hooking part 6. As a result, string 11 is hooked onto second hooking part 7, wrapped around base 2 about halfway around, and then hooked onto first hooking part 6. This results in the state shown in Figure 5.

[0043] Finally, as shown by the bold arrow in FIG. 5, the end of string 11 is hooked again into hook groove 8a of hook portion 8 and passed from the back side to the front side.

[0044] 6, the string 11 is firmly fixed to the string fastener 10. To remove the string 11 from the string fastener 10, the above-described procedure can be carried out in reverse.

[0045] In the state shown in Figure 3, the string 11 is hooked on both the hook portion 8 of the string fastener 10 and the first hook portion 6. The worker performs all of the steps shown in Figures 2 to 6 while pulling the tip of the string 11. In particular, by pulling the tip of the string 11 in the direction of arrow P in the state shown in Figure 3, slack in the entire string 11 can be effectively removed. At this time, the string 11 hooked on the first hook portion 6 is guided toward the base 2 by the inclination of the first guide surface 6a described above. Therefore, the string 11 will not come off the first hook portion 6 during the process of pulling the string 11 in the direction of arrow P as described above.

[0046] As shown in FIG. 1, the fixed part 1 is positioned offset from the center 2c of the base 2 toward the side farther from the second hanging part 7 (closer to the first hanging part 6). Therefore, when the string 11 is hung on the first hanging part 6 and pulled as shown in FIG. 3, the fixed part 1 can easily withstand the pulling force without causing the string fastener 10 to change position significantly. This ensures that the guiding action of the first guide surface 6a can be reliably performed. Therefore, the string 11 is unlikely to come off the first hanging part 6 in the state shown in FIG. 3.

[0047] FIG. 4 shows the state immediately before the string 11 is hung on the second hanging part 7. Due to the inclination of the second guide surface 7a described above, the string 11 can be hung on the second hanging part 7 while being guided to a portion close to the base 2, as shown in FIG. 5. In this way, the inclination of the second hanging part 7 makes it difficult for the string 11 to come off the second hanging part 7. Furthermore, since the string 11 is unlikely to become loose near the second hanging part 7, it can be firmly fixed.

[0048] Next, an example of the use of the string fastener 10 will be described.

[0049] Figure 7 shows scaffolding 21 temporarily set up close to a building 20. This scaffolding 21 is a so-called single-pipe scaffolding, but the configuration of the scaffolding is arbitrary. Figures 7 and 8 show the scaffolding 21 as seen from outside the building. For convenience of illustration in the drawings, the building 20 and scaffolding 21 are shown by chain lines in Figures 7 and 8.

[0050] A hanging rope (opening / closing guide member) 22 is stretched horizontally at the upper edge of the scaffolding 21. The hanging rope 22 is provided across the entire width of the scaffolding 21. Protective sheets 25 and 26, which will be described later, can be hung from this hanging rope 22 like a curtain. It is preferable that a sufficiently strong tension be applied to the hanging rope 22 so that it does not sag and hang down even when the weight of the protective sheets 25 and 26 is applied. Any configuration can be used to tightly tension the hanging rope 22, but for example, the hanging rope 22 can be connected to a belt tensioner and pulled.

[0051] Two protective sheets 25, 26 are provided, separated by vertical member 21a, which is located near the center in the width direction among the vertical members that make up scaffolding 21. Each of protective sheets 25, 26 is rectangular. The configuration of protective sheets 25, 26 is arbitrary, but they can be configured as mesh sheets, for example. Each of protective sheets 25, 26 may be configured as a single sheet, or may be configured by joining two or more sheets vertically or horizontally.

[0052] Although not shown in Figure 7, through holes are formed at appropriate intervals in the portions corresponding to each side of the rectangular protective sheets 25, 26. Link members 23 are fixed to the through holes located at the upper ends of the protective sheets 25, 26, and these link members 23 are attached to the hanging ropes 22. A plurality of link members 23 are provided on the protective sheets 25, 26 at appropriate intervals.

[0053] Each link member 23 is slidable relative to the hanging rope 22. Therefore, the protective sheets 25, 26 can be moved away from each other from the position of the vertical member 21a, and opened as shown in FIG.

[0054] The link member 23 may have any configuration. For example, a member provided with a pulley can be used as the link member 23, and the pulley can be attached so that it rests on the suspension rope 22. Also, for example, a known cable tie can be used as the link member 23. By leaving sufficient slack in the loop of the cable tie, the cable tie can slide and move relative to the suspension rope 22.

[0055] The string 11 and string fastener 10 can be used to connect and secure the protective sheets 25, 26 together horizontally, for example at the portion indicated by symbol A, when the protective sheets 25, 26 are closed as shown in Figure 7.

[0056] An enlarged view of fixing point A is shown in Figure 9. Unlike Figure 7, Figure 9 shows the protective sheets 25, 26 as seen from the inside. The process of fixing both of the two protective sheets 25, 26 to the vertical member 21a will be described with reference to Figure 9.

[0057] The worker fixes one end of the string 11 to the fixed part 1 of the string fastener 10 in advance. The method of tying the string 11 to the fixed part 1 is arbitrary.

[0058] 9, the worker first ties and fixes the middle portion of the string 11 to the through-hole 25a of the protective sheet 25. The worker pulls out the end of the string 11 fixed to the protective sheet 25, on the side where the string fastener 10 (fixed portion 1) is fixed, to the opposite side of the protective sheet 26, and loops it around the vertical member 21a.

[0059] Next, the worker passes the end of the string 11 fixed to the protective sheet 25, the end to which the string fastener 10 is not fixed, through the through-hole 26a of the protective sheet 26. The worker pulls out the string 11 that has passed through the through-hole 26a to the opposite side of the protective sheet 25 and loops it around the vertical member 21a.

[0060] 9 shows the state immediately before the string 11 is hung on the string fastener 10. From this state, by carrying out the steps shown in FIGS. 2 to 6, the protective sheets 25, 26 can be easily fixed to the vertical members 21a with the string 11.

[0061] The above-mentioned work is performed for each of the through holes 25a, 26a arranged side by side at an appropriate interval in the area where the two protective sheets 25, 26 meet in Fig. 7. This fixes the protective sheets at each fixing point A, and the protective sheets 25, 26 can be firmly maintained in the closed state as shown in Fig. 7.

[0062] If strong winds are expected in the near future, the protective sheets 25, 26 can be unfolded as shown in Figure 8 by removing the strings 11 from the string fasteners 10 at all of the fixing points A. The protective sheets 25, 26 are folded appropriately during the unfolding process and fixed to the vertical members 21b located at the ends of the scaffolding 21 in the width direction. For this fixing, the string fasteners 10 may be used, or another method may be used.

[0063] Conventionally, the protective sheets 25, 26 have been fixed to the vertical members 21a using only the strings 11. In this embodiment, by using the string fasteners 10, the strings 11 can be fixed by the simple process shown in Figures 2 to 6. Therefore, the work is easy even when the worker is wearing work gloves, for example, and convenience is improved.

[0064] As described above, the string fastener 10 of this embodiment includes the fixed portion 1, the base 2, the first hooking portion 6, and the second hooking portion 7. The fixed portion 1 can be fixed to a member different from the string fastener 10. The base 2 extends from the fixed portion 1. The first hooking portion 6 branches off and extends from the base 2, and can be used to hang the string 11. The second hooking portion 7 branches off and extends from the base 2 on the side opposite the first hooking portion 6, and can be used to hang the string 11. The first hooking portion 6 is formed with a first guide surface 6a that is inclined so that it approaches the fixed portion 1 as it moves away from the base 2, and that guides the hung string 11. The second hooking portion 7 is formed with a second guide surface 7a that is inclined so that it approaches the fixed portion 1 as it moves away from the base 2, and that guides the hung string 11.

[0065] As a result, by hanging the string 11 on the first hanging part 6 and the second hanging part 7, the string 11 can be fixed to the string fastener 10 while ensuring a certain level of strength against pulling of the string 11 in a direction along the base 2. This reduces the effort required to attach and detach the string 11. Furthermore, because the first guide surface 6a and the second guide surface 7a are inclined, the hung string 11 is less likely to come off the string fastener 10.

[0066] In the string fastener 10 of this embodiment, a long and narrow hook groove 8a is formed on the side farther from the fixed part 1 than the first guide surface 6a. The longitudinal direction of the hook groove 8a is substantially parallel to the direction in which the first hanging part 6 and the second hanging part 7 are aligned. The end of the hook groove 8a in the longitudinal direction farther from the first hanging part 6 is open.

[0067] This allows the string 11 to be easily pulled in the direction of arrow P in Figure 3 to remove slack when it is inserted into the hook groove 8a and hooked on the first hooking part 6. Furthermore, the position of the string 11 inserted in the hook groove 8a is stabilized at the end opposite the open end of the hook groove 8a. This makes it easy to handle the string 11 so that it can be hooked on the second hooking part 7 after being pulled tight as described above.

[0068] In the string fastener 10 of this embodiment, a protrusion 8b is formed in the hook groove 8a near the open end.

[0069] This makes it difficult for the string 11 to slip out of the hook groove 8a.

[0070] In the string fastener 10 of this embodiment, the fixed portion 1 is formed with a through-hole 1a.

[0071] This allows for a simple configuration for fixing another member (the string 11 in this embodiment) to the string fastener 10.

[0072] In the string fastener 10 of this embodiment, the location where the string 11 is fixed to the fixed part 1 (specifically, the fixing hole 1a) is positioned offset from the center 2c of the base 2 to the side farther from the second hooking part .

[0073] As a result, when the string 11 is pulled while it is hung on the first hanging part 6 as shown in FIG. 3, the tensile force can be effectively received by the fixed part 1.

[0074] The string fastener 10 of this embodiment is used for the string 11 that secures the protective sheets 25, 26 of the scaffolding 21.

[0075] This makes it easy to switch between a state in which the scaffolding 21 is covered and a state in which it is not covered by the protective sheets 25, 26. Therefore, measures against strong winds can be taken more flexibly.

[0076] In this embodiment, the string 11 is fixed using the string fastener 10 in the following manner. In a first step, the string 11 is hung on the first hanging part 6. In a second step, the tip of the string 11 hung on the first hanging part 6 is pulled in a direction generally along the base part 2 and away from the fixed part 1. In a third step, the string 11 is hung on the second hanging part 7.

[0077] This allows the slack in the string 11 to be easily removed by pulling the string 11 in the second step. Therefore, strong fixation by the string 11 can be easily achieved.

[0078] The preferred embodiment of the present invention has been described above, but the above configuration can be modified, for example, as follows. Each modification may be made alone, or multiple modifications may be made in any combination.

[0079] The fixed part 1 may have any configuration. For example, as shown in a modified string fastener 10x in Fig. 10, the fixed part 1 may have a configuration corresponding to a base part 2, a first hook part 6, a second hook part 7, and a hook part 8 in order to fasten a string 11.

[0080] The first guide surface 6a and the second guide surface 7a may be curved (for example, arc-shaped) slopes instead of being linear slopes.

[0081] In the string fastener 10, the hook portion 8 may be omitted.

[0082] The steps of FIG. 3 and FIG. 4 may be repeated not only once but multiple times.

[0083] For the protective sheet 25, strings 11 and string fasteners 10, 10x can be used to fasten the edge of the protective sheet 25 on the horizontal side opposite the portion indicated by fastening point A in Fig. 7 to the vertical member 21b. The same applies to the protective sheet 26.

[0084] The fastening by the string 11 and the string fasteners 10, 10x can also be used for purposes other than fastening the protective sheets 25, 26. [Explanation of symbols]

[0085] 1 Fixed part 1a Fixing hole 2 base 2c center 6 First hook 6a First guide surface 7 Second hanging part 7a Second guide surface 8a Hook groove (recess) 8b Protrusion (retaining part) 10,10x lace fasteners 11 Pimp 21 Scaffolding 25,26 Protective sheet

Claims

1. a fixed portion that can be fixed to another member; a base portion extending from the fixed portion; a first hook portion that branches off and extends from the base portion and that can be used to hang a string; a second hooking portion that branches off from the base portion and extends to the opposite side of the first hooking portion, and that can be used to hang a string; Equipped with The first hooking portion is formed with a first guide surface that is inclined so as to approach the fixed portion as it moves away from the base portion, and that guides the hung string, The second hooking portion is formed with a second guide surface that is inclined so as to approach the fixed portion as it moves away from the base portion, and that guides the hung string. an elongated recess is formed on a side farther from the fixed portion than the second guide surface; a longitudinal direction of the recessed portion is substantially parallel to a direction in which the first hook portion and the second hook portion are aligned; A string fastener characterized in that the end of the recess in the longitudinal direction, which is farther from the first hook portion, is open.

2. The string fastener according to claim 1, A string fastener characterized in that a retaining portion is formed in the recess near the open end.

3. The string fastener according to claim 1 or 2, A string fastener characterized in that a through-hole is formed in the fixed portion.

4. The string fastener according to any one of claims 1 to 3, A string fastener characterized in that, when the other member is a string, the fixing location of the string relative to the fixed part is located offset away from the center of the base part and away from the second hanging part.

5. The string fastener according to any one of claims 1 to 4, A string fastener characterized by being used for strings that secure protective sheets on scaffolding.

6. A string fastening method using the string fastener according to any one of claims 1 to 5, a first step of hanging a string on the first hanging portion; a second step of pulling the tip of the string hung on the first hanging portion in a direction generally along the base portion and away from the fixed portion; a third step of hanging a string on the second hanging portion; A string fastening method comprising:

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