Belt attachment device and fall arrest harness

Abstract

To provide a belt fixture having a simple and compact structure and including both functions, the roles of bundling belts and suppressing belt slippage, and fall arrest harness.SOLUTION: A belt fixture comprises a belt carrier 12 and a belt fixing part 14. The belt carrier is formed in a flat cylindrical shape, and includes an insertion hole 16 having width and height enough for overlapped belts to pass through. The belt fixing part has a substantially rectangular external shape, and includes an insertion groove 18 provided inside thereof and having width and length enough for the overlapped belts to pass through, an extension part 20 located between the belt carrier and the insertion groove and formed to extend from a rear side of the belt carrier in the longitudinal direction of a belt to be inserted into the insertion hole, and an edge side 22 located in the opposite side of the extension part of the insertion groove. The edge side includes an opening 24 being open by a prescribed length, and a pair of belt fixing claws 26 formed to project in directions facing each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a belt attachment device and a fall arrest harness. [Background technology]

[0002] At work sites at height, workers are required to wear fall arrest devices to prevent their falls in the event of a fall. Of these, harness-type fall arrest devices mainly consist of a harness and a lanyard. Workers attach a hook or similar device to a lifeline or a solid structure, and connect the other end of the lanyard to the harness worn around their body to prevent falls in the event of a misstep or other accident.

[0003] When putting on a harness, if it is not fastened securely and tightly, the belt may slip up when arresting a fall, putting too much load on a specific belt and making it difficult to maintain a safe posture. Therefore, it is important to properly adjust the length of the belts on each part, such as the shoulders and thighs, to fit each person's body type.

[0004] When the length is adjusted, excess belt length is generated. If the excess belt length is left untied, it may get caught on structures or pinched between components during work. If the excess belt length gets caught or pinched while moving to a different work position and hinders movement, the worker may be suddenly pulled backward, losing balance and possibly stepping off the high scaffold. For this reason, excess belt length is tied together with overlapping belts using belt loops (see, for example, Patent Document 1 (paragraph 0019, Figure 1)).

[0005] Furthermore, the wearer's movements or other factors may cause the belt to move in a direction that loosens the adjusted position. As a countermeasure against this slippage, a belt fixing device is attached near the length adjustment point (see, for example, Figure 1 of Patent Document 2). This belt fixing device is formed from a plate-like member and has a roughly rectangular outer shape. Two horizontally elongated parallel insertion holes are provided inside the fixing device, and the fixing device has a central side located between the two insertion holes and end sides located outside the two insertion holes, with openings of a predetermined length provided on these end sides. In this belt fastener, the overlapped belt is passed through one opening and inserted into one insertion hole, then passed over the central edge, and then passed through the other opening and inserted into the other insertion hole.The overlapped belt is sandwiched from above and below between one end edge and the central edge, and between the central edge and the other end edge, thereby preventing the length-adjusted belt from slipping. In this way, at the belt length adjustment point, a belt loop (loop) for bundling the belt and a belt fixing device for preventing the belt from slipping are attached. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2020-28435 [Patent Document 2] Japanese Patent Application Laid-Open No. 2018-140286 Summary of the Invention [Problem to be solved by the invention]

[0007] Since harnesses are designed to be worn around multiple body parts, there are multiple points where the belt length can be adjusted. Therefore, attaching both the belt loop (strap) and the belt fastener to each adjustment point increases the number of parts and the number of work steps required when assembling the harness, leading to increased costs. In addition, when workers put on their harnesses, they had to adjust the belt length to fit their body type in multiple places, which made putting on the harness before work time-consuming. The object of the present invention is to provide a belt attachment device and a fall arrest harness that has a simple and compact structure and has the functions of both bundling the belt and suppressing belt slippage. [Means for solving the problem]

[0008] The belt attachment device of the present invention is a belt attachment device having a belt loop portion and a belt fixing portion, wherein the belt loop portion is formed in a flat cylindrical shape and has an insertion hole having a width and height sufficient to allow overlapping belts to be inserted therethrough, the belt fixing portion has a roughly rectangular outer shape and is provided therein with an insertion groove having a width and length sufficient to allow overlapping belts to be inserted therethrough, an extension portion located between the belt loop portion and the insertion groove and extending from the back side of the belt loop in the longitudinal direction of the belt inserted into the insertion hole, and an end edge located on the opposite side of the extension portion of the insertion groove, and the end edge is provided with an opening that is open to a predetermined length and a pair of belt fixing claws that are formed to protrude in opposite directions.

[0009] In the belt attachment of the present invention, it is preferable that a bulge portion bulging toward the inside of the hole is provided on the inner wall surface of the insertion hole on the surface side of the belt loop portion. The fall arrest harness of the present invention is characterized by including the above-described belt attachment device. [Effects of the Invention]

[0010] The belt attachment device according to the present invention has a belt loop and a belt fixing part, the belt loop has an insertion hole large enough to allow overlapping belts to pass through, and the belt fixing part has an insertion groove, an extension, and an end edge, the end edge of which is provided with an opening and a pair of belt fixing claws. This structure makes it possible to provide a belt attachment device with a simple and compact structure that has both the function of bundling belts and the function of preventing belt slippage. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view of the belt attachment device of the present embodiment. [Figure 2] FIG. 2 is a front view of FIG. [Figure 3] FIG. 2 is a rear view of FIG. [Figure 4] FIG. 2 is a plan view of FIG. [Figure 5] FIG. 2 is a bottom view of FIG. 1. [Figure 6] FIG. 2 is a right side view of FIG. [Figure 7] 1 is a diagram showing a fall arrest harness equipped with a belt attachment device of this embodiment. [Figure 8] 1A is a diagram showing a free state in which the belt is not fixed to the belt fixing part, and FIG. 1B is a cross-sectional view taken along line AA. [Figure 9] 1A is a view showing a locked state in which the belt is fixed to the belt fixing part, and FIG. 1B is a cross-sectional view taken along line BB. [Figure 10] FIG. 10 is a cross-sectional view showing a state in which only one belt is inserted into the insertion groove. [Figure 11] FIG. 10 is a cross-sectional view showing a modified example of the belt attachment device of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the belt attachment of this embodiment, FIG. 2 is a front view thereof, FIG. 3 is a rear view thereof, FIG. 4 is a plan view thereof, FIG. 5 is a bottom view thereof, and FIG. 6 is a right side view thereof. The material constituting the belt attachment device 10 may be a resin material, a metal material such as steel or aluminum alloy, or a rubber material. Among these, polyethylene resin or polyamide resin is preferably used from the viewpoint of cost. As shown in Figures 1 to 6, the belt attachment device 10 of this embodiment comprises a belt loop part 12 and a belt fixing part 14. The belt loop part 12 is formed in a flat cylindrical shape and is provided with an insertion hole 16. This insertion hole 16 has a width and height sufficient to allow overlapping belts to be inserted therethrough.

[0013] The belt fixing portion 14 has a generally rectangular outer shape and includes an insertion groove 18 , an extension portion 20 , and an end side 22 . The insertion groove 18 has a width and length sufficient to allow the overlapping belts to be inserted therethrough. The insertion groove 18 is provided at a position where the width directions of the insertion groove 18 and the insertion hole 16 of the belt loop portion 12 are parallel to each other. The extension 20 is located between the belt loop 12 and the insertion groove 18 and is formed to extend from the rear surface side of the belt loop 12 in the longitudinal direction of the belt inserted into the insertion hole 16 . The end edge 22 is the edge located opposite the extending portion 20 of the insertion groove 18. This end edge 22 is provided with an opening 24 that is open to a predetermined length and a pair of belt fixing claws 26. The center portion of the end edge 22 is open as the opening 24, and the remaining portion forms the pair of belt fixing claws 26.

[0014] The length of the extension portion 20 is set to a length that makes it easy to pass the belt through the opening 24. The extension portion 20 preferably has a length of 8 to 10 mm. If the length of the extension portion 20 is less than the above range, the length of the belt fixing portion 14 becomes short, making it difficult to ensure the length necessary to fold and pass the overlapping belts through. As a result, it becomes difficult to pass the belt through the opening 24. This may cause the worker to have difficulty in operating the anti-slip fixing device to fix the belt, which may take a long time to put on the harness. On the other hand, if the length exceeds the above range, the belt located between the insertion hole 16 and the insertion groove 18 may be easily bent and loosened, which may make the belt more likely to slip. Furthermore, the length of the belt fixing portion 14 becomes long, which increases the size of the belt attaching device 10, leading to increased weight and cost.

[0015] When the overlapping belts are inserted into the insertion groove 18 and locked in the belt fixing portion 14, the overlapping belts are held down by the belt fixing claws 26 so as not to slip out of the insertion groove 18. The opening 24 in the end side 22 and the pair of belt fixing claws 26 are set to a length sufficient to prevent the belt from slipping out of the insertion groove 18. The length of the opening 24 is preferably set to 1 / 2 to 2 / 3 of the width of the belt. If the length of the opening 24 is less than the above range, the belt fixing claws 26 can firmly hold the inserted belt, but the width through which the belt passes is too narrow, making it difficult to insert the belt into the opening 24. On the other hand, if the length of the opening 24 exceeds the above range, the length required for the belt fixing claws 26 to hold the belt is insufficient, and the overlapping belts are more likely to slip out of the insertion groove 18.

[0016] FIG. 7 is a diagram showing a fall arrest harness equipped with a belt attachment device of this embodiment. As shown in Figure 7, the belt attachment devices 10 are attached to the belt length adjustment points of the fall arrest harness 30. In the fall arrest harness 30 shown in Figure 7, the belt attachment devices 10 are attached to the adjustment points of the side belts 32 and the thigh belts 34. Hereinafter, a method of using the belt attaching device 10 of this embodiment will be described using an example in which the belt attaching device 10 is attached to an adjustment portion of the side belt 32.

[0017] FIG. 8(A) is a diagram showing a free state in which the belt is not fixed to the belt fixing portion, and FIG. 8(B) is a cross-sectional view taken along line AA of FIG. 8(A). 8(A) and 8(B), the overlapping belts 36 are not fixed to the belt fixing part 14 and are in a free state, and are used as a belt loop to bundle the side belt 32 and the belt 38 whose excess length has been generated by adjusting the belt length. The side belt 32 and the excess belt 38 generated by length adjustment are overlapped and passed through the insertion hole 16 of the belt loop part 12. As a result, the overlapping belts 36 are bundled by the belt loop part 12, and the excess belt 38 does not play. Note that in the state shown in FIGS. 8(A) and 8(B), the belt 36 is not fixed in an anti-slip manner by the belt attaching tool 10, so the belt attaching tool 10 can slide in the longitudinal direction of the belt 36, and the length of the side belt 32 can also be adjusted.

[0018] FIG. 9(A) is a diagram showing a locked state in which the belt is fixed to the belt fixing portion, and FIG. 9(B) is a cross-sectional view taken along line BB. In Figures 9(A) and 9(B), the overlapped belts 36 are locked and secured to the belt fastener 14, serving as a belt fastener that prevents the length-adjusted belt from slipping. The overlapped belts 36 are inserted through the opening 24 formed in the end edge 22 and then passed through the insertion groove 18. To pass the overlapped belts 36 through the insertion groove 18, the overlapped belts 36 are folded widthwise and inserted into the opening 24 from the belt width end closest to the center, and then the overlapped belts 36 are returned to their original flat state. The belt 36 inserted through the insertion groove 18 passes through the back side of the belt fastening claw 26. The belt 36 is sandwiched between the extension 20 and the belt fastening claw 26 in the insertion groove 18, and the belt 36 is secured to the belt fastener 14 without slipping. On the side opposite the end edge 22 of the insertion groove 18, the overlapping belt 36 is passed through the insertion hole 16 by the belt loop 12, and since frictional force is generated between the insertion hole 16 and the belt 36, the bundling of the belt by the belt loop 12 also contributes to a certain extent to the anti-slip fixation.

[0019] FIG. 10 is a cross-sectional view showing a state in which only one belt is inserted into the insertion groove. The insertion groove 18 is set to a length that allows the thickness of the overlapping belts 36 to pass through, so if only one belt is passed through the insertion groove 18, a gap will be created in the insertion groove 18 and it cannot be said that the anti-slip fixation is sufficient. However, since the side belt 32 is passed through the insertion groove 18, the belt attachment device 10 is positioned in a predetermined position on the side belt 32. In the state shown in Figure 10, the excess length of the belt 38 that is not passed through the insertion groove 18 can be slid longitudinally to adjust the length.

[0020] <Effects of this embodiment> According to this embodiment, the following effects can be obtained. The belt attachment device 10 of this embodiment has a belt loop portion 12 and a belt fixing portion 14. The belt loop portion 12 has an insertion hole 16 large enough to allow overlapping belts 36 to pass through, and the belt fixing portion 14 has an insertion groove 18, an extension portion 20, and an end edge 22, with an opening 24 and a pair of belt fixing claws 26 provided on the end edge 22. This structure provides a belt attachment device with a simple and compact structure that has both the functions of bundling belts and preventing belt slippage. In this way, the functions of bundling belts and preventing belt slippage are combined into a single component. Using this belt attachment device 10 reduces the number of parts and the number of work steps during harness assembly, thereby reducing the burden of assembly and leading to cost savings. Furthermore, with the belt attachment device 10 of this embodiment, the belt 36 is simply inserted into the insertion groove 18 of the belt fixing portion 14 to prevent slippage, so it is easier to operate than conventional belt fasteners that clamp and hold the belt from above and below between the upper and lower end edges and center edge, respectively, and this leads to a reduction in the time it takes for the worker to put on the harness.

[0021] <Modification> The present invention is not limited to the above-described embodiment, and any modifications and improvements that can achieve the object of the present invention are included in the present invention. In the above embodiment, the belt 36 is prevented from slipping by being fixed in place by the belt fixing portion 14, but this is not limiting. For example, the belt looping portion 12 may also be provided with a function for preventing belt slippage. Specifically, as shown in Fig. 11, a bulge 40 bulging toward the inside of the insertion hole 16 is provided on the inner wall surface of the insertion hole 16 on the surface side of the belt looping portion 12. With the above-described configuration, the belt 36 is clamped between the extension portion 20 and the pair of belt fixing claws 26 at the belt fixing portion 14, and the height of the insertion hole 16 is narrowed by the bulge portion 40 on the belt threading portion 12 side, making it more difficult for the belt 36 to slide, and as a result, slippage of the belt 36 can be more firmly suppressed. [Industrial Applicability]

[0022] The belt attachment tool described above can be applied appropriately to any part of the body where belt length adjustment is required. [Explanation of symbols]

[0023] 10 Belt attachment 12 Belt loop 14 Belt fixing part 16 Insertion hole 18 Insertion groove 20 Extension 22 End edge 24 Opening 26 Belt fixing hook

Claims

1. A belt attachment device that is attached to a length adjustment portion of a belt of a fall arrest harness and has a belt loop portion and a belt fixing portion, The belt loop portion is formed in a flat cylindrical shape and has an insertion hole having a width and height sufficient to allow the overlapping belts to be inserted therethrough, The belt fixing portion has a substantially rectangular outer shape, an insertion groove provided therein and having a width and length sufficient for the overlapping belts to be inserted therethrough; an extension portion located between the belt passing portion and the insertion groove and extending from a rear surface side of the belt passing portion in a longitudinal direction of the belt inserted into the insertion hole; an end side located on the opposite side of the insertion groove from the extending portion, The end side is provided with an opening that is open to a predetermined length and a pair of belt fixing claws that are formed to protrude in opposite directions. A belt attachment device characterized by:

2. a bulging portion bulging toward the inside of the insertion hole on the inner wall surface of the belt loop on the surface side of the belt loop; was established 2. The belt attachment device according to claim 1.

3. A fall arrest harness comprising the belt attachment device according to claim 1 or 2.

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