Lanyards for fall arrest devices and fall arrest devices

Abstract

To provide a lanyard for crash arrest appliance and a crash arrest appliance which can be improved in working properties and safety properties.SOLUTION: A lanyard 5 comprises: a fitting part 11 which is fitted to shoulder girdles 2 at a back part of the shoulder girdles 2 being put around left and right shoulders; a shock absorber 12 extending downward from the fitting part 11; a branch part 13 arranged at a position below the shock absorber 12 and whose height corresponds to a height of the lumbar part of a user; and a hook part 14 which has a rope 15 which is branched to left and right sides from the branch part 13, and lanyard hooks 10 provided on a tip end of the rope. A crash arrest appliance 1 comprises: the shoulder girdles 2 put around left and right shoulders and extending to the lumbar part of a user; thigh belts 3 each of which is connected to a lower end part of the shoulder girdle 2 and is put around the left / right thigh; rest hooks 4 each of which is arranged on the shoulder girdle 2 or a same position to the height of the lumbar part of the user on the thigh belt 3 or a lower position lower than the height of the lumbar part of the user on the thigh belt; and the lanyard 5. The lanyard hooks 10 can be engaged to the rest hooks 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lanyard for a fall prevention device used for working at heights at construction sites and the like, and to a fall prevention device that employs this lanyard. [Background technology]

[0002] When working at heights at building construction sites, etc., it is essential to wear a fall prevention device to prevent falls. This fall prevention device is equipped with shoulder straps that are placed around the left and right shoulders of the user, and thigh straps that are connected to the lower ends of the shoulder straps and placed around the left and right thighs of the user, respectively.

[0003] For example, in the configuration shown in Patent Document 1 below, a connection part (connection metal fitting) is provided on the back part of the shoulder belt (near the middle of the left and right shoulder blades), and a buffer belt (shock absorber) extends downward from this connection part. A connection part is provided at the lower end of the buffer belt (almost at the center of the user's back). A rope is connected to the connection part, branching to the left and right. A lanyard hook is provided at the end of each rope to be attached to a handrail or the like at a construction site (see paragraph 0008, Figure 7, etc. of Patent Document 1). This lanyard hook is generally attached to a rest hook provided in front of the user's chest when not in use, as shown in Patent Document 2 below (see paragraph 0019, Figure 4, etc. of Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-18479 A [Patent Document 2] JP 2013-150665 A Summary of the Invention [Problem to be solved by the invention]

[0005] To ensure the safety of users at construction sites, in addition to wearing fall arrest equipment, there are increasing opportunities for users to wear secondary equipment over fall arrest equipment, such as air-conditioned clothing such as cooling jackets equipped with cooling fans to prevent heat stroke, cold weather clothing to maintain body temperature in winter, life jackets to protect against falling into the water, and reflective vests that are required to be worn at night and during the day when working on highways, etc.

[0006] However, in the configurations described in Patent Documents 1 and 2, the rope branching off from the lower end of the buffer belt causes the bottom of the secondary equipment to roll up, and the rest hook that engages the lanyard hook at the end of the rope is largely hidden by the secondary equipment, which may reduce workability and safety.

[0007] In order to ensure the ease of use when putting on the fall arrest equipment, it is possible to reverse the order of putting on the secondary equipment and putting on the fall arrest equipment, whereas the fall arrest equipment is usually put on first, and then the secondary equipment. In this way, while the ease of use of the fall arrest equipment can be ensured, problems may arise, such as the air-conditioned suit being compressed by the shoulder belt or waist belt of the fall arrest equipment, preventing the flow of air inside the air-conditioned suit, the padding of the winter clothing being compressed by the shoulder belt or waist belt of the fall arrest equipment, and the original warmth being lost, and most of the reflective material of the reflective vest being hidden by the shoulder belt, waist belt, lanyard, etc. of the fall arrest equipment, preventing the original visibility from being exhibited.

[0008] Therefore, an object of the present invention is to provide a lanyard for a fall arrest device and a fall arrest device that improves workability and safety without compromising the performance of secondary equipment such as air-conditioned clothing. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention provides: An attachment portion that is attached to the shoulder strap at a back portion of the shoulder strap that is wrapped around the left and right shoulders of the user, A shock absorber extending downward from the mounting portion; a branch portion located below the shock absorber and at a height corresponding to a user's waist; A hook portion including a rope branched to the left and right from the branching portion and a lanyard hook provided at the tip of the rope; A lanyard for a fall arrest device having the above structure was constructed.

[0010] Furthermore, in this invention, A shoulder strap that is wrapped around the user's left and right shoulders and reaches the waist, A thigh belt connected to the lower end of the shoulder belt and wrapped around the left and right thighs of the user, A rest hook is provided at a position equal to or lower than the height of the waist of the user of the shoulder belt or thigh belt; A lanyard for the fall arrest device described above; The fall arrest device is configured so that a lanyard hook of a lanyard for the fall arrest device can be engaged with the rest hook.

[0011] When the lanyard for the fall arrest device and the fall arrest device are configured as described above, when a user puts on the fall arrest device and then the secondary equipment, the rope of the hook part is likely to be under the bottom of the secondary equipment, so that the bottom can be prevented from rolling up. Also, since the rest hook for engaging the lanyard hook is provided at the height of the user's waist, the lanyard hook can be easily attached and detached while the secondary equipment is attached. Effect of the Invention

[0012] In this invention, a lanyard for a fall arrest device and a fall arrest device are constructed as described above, so that the workability and safety of the fall arrest device using the lanyard for the fall arrest device can be improved without compromising the performance of secondary equipment such as air-conditioned clothing. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a rear view showing a first embodiment of a fall prevention device according to the present invention; [Diagram 2] A perspective view from the front side of the fall prevention device shown in FIG. 1 in a worn state. [Diagram 3] A perspective view from the rear side of the fall prevention device shown in FIG. 1 in a worn state. [Figure 4] A rear view of a lanyard used in the fall arrest device shown in Figure 1. [Diagram 5] FIG. 11 is a rear view showing a second embodiment of the fall prevention device according to the present invention; [Figure 6] A perspective view from the front side of the fall prevention device shown in FIG. 5 in a worn state. [Figure 7] A perspective view from the rear side of the fall prevention device shown in FIG. 5 in a worn state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] A first embodiment of a fall arrest device 1 according to the present invention will be described with reference to the drawings. As shown in Figs. 1 to 4, the fall arrest device 1 has shoulder belts 2, thigh belts 3, rest hooks 4, and a lanyard 5 as its main components.

[0015] Shoulder belt 2 is a member that is worn around the left and right shoulders of the user, respectively, and reaches the waist. The belt that goes over the left shoulder (hereinafter referred to as left belt 6) and the belt that goes around the right shoulder (hereinafter referred to as right belt 7) cross over the upper part of the user's back (near the area between the left and right shoulder blades). The front side of right belt 7 and the rear side of left belt 6 cross over each other at the user's right flank and are fixed by sewing. The front side of left belt 6 and the rear side of right belt 7 cross over each other at the user's left flank and are fixed by sewing. On the user's chest side, left belt 6 and right belt 7 can be fixed by a horizontally disposed chest fixing member 8 that can be freely separated and connected.

[0016] The thigh belts 3 are connected to the lower ends of the shoulder belts 2 (left belt 6, right belt 7) and are wrapped around the left and right thighs of the user. The thigh belts 3 are looped and are fixed to the ends of the left belt 6 and the right belt 7 by sewing.

[0017] A waist belt 9 is provided at a height position corresponding to the waist of the user, which is draped around the waist. The waist belt 9 is sewn and fixed to the shoulder belts 2 (left belt 6, right belt 7) and also to the lanyard 5. The strength of the sewn connection to the lanyard 5 is smaller than the strength of the sewn connection to the shoulder belts 2, etc., and is configured so that if a large impact acts on the lanyard 5 during a fall, for example, the stitching will come undone and the waist belt 9 and lanyard 5 will separate. By separating them in this way, when the user is about to fall, they will assume the same hanging position as conventional fall arrest devices, and the fall can be stopped while dispersing the impact to the limbs and torso.

[0018] The rest hook 4 is a member for engaging the lanyard hook 10, which will be described later, when not in use, and is provided on the waist belt 9. This position is near the bottom end of the hem of the secondary equipment, such as an air-conditioned suit, when the user wears the secondary equipment (see the dashed line in Figs. 2 and 3), and is configured so that the lanyard hook 10 can be easily engaged with the rest hook 4 by slightly rolling up the hem.

[0019] As shown in FIG. 4, the lanyard 5 has an attachment portion 11, a shock absorber 12, a branch portion 13, and a hook portion 14 as main components.

[0020] The attachment part 11 is a member that is attached to the shoulder belt 2 at the back part (where the left belt 6 and right belt 7 intersect) of the shoulder belt 2 that is slung around the left and right shoulders of the user. In this embodiment, the shoulder belt 2 and the attachment part 11 are provided so as not to be detachable, but the shoulder belt 2 and the attachment part 11 can also be made detachable (the lanyard 5 can be replaced).

[0021] The shock absorber 12 is a member that expands in its length direction due to the impact of a crash, thereby absorbing the impact caused by the crash. The shock absorber 12 extends downward from the attachment portion 11.

[0022] An elastic rope 15 is attached to the lower end of the shock absorber 12 via a metal fitting 16. The rope 15 is folded back at the metal fitting 16 so as to divide its entire length into two equal parts. A holding member 17 is provided near the folded back part (below the metal fitting 16) to bundle the two folded ropes 15. The holding force of the holding member 17 is so small that when an impact is applied due to a fall, the holding force is released and the bundled ropes 15 unfold (split into left and right). The impact is absorbed when the holding force of the holding member 17 is released and the bundled ropes 15 unfold. As the holding member 17, various means such as metal fittings, hook-and-loop fasteners, sewn threads, and easily breakable sheets configured to come off the bundled ropes 15 when an impact is applied can be used. The position of the shock absorber 12 is not limited to the position shown in FIG. 1, and it can be moved slightly in the vertical direction.

[0023] The branched portion 13 is located below the shock absorber 12 and at a height approximately equal to the height of the user's waist. In this embodiment, the lower end of the holding member 17 corresponds to the branched portion 13.

[0024] The hook portion 14 has a rope 15 branched to the left and right from the branch portion 13, and a lanyard hook 10 attached to the tip of the rope 15. In this embodiment, a so-called "two-rope" configuration having two ropes 15 branched to the left and right is shown, but a "single-rope" configuration having only one rope 15 is also possible. This lanyard hook 10 can be hooked to a rest hook 4 attached to the waist belt 9 when not in use.

[0025] The manner of use of this fall arrest device 1 will now be described. First, the left strap 6 of the shoulder strap 2 is hung around the left shoulder and the right strap 7 is hung around the right shoulder, and the left strap 6 and right strap 7 are then secured by the chest fastening member 8. Next, the thigh straps 3 are wrapped around the left and right thighs, and the waist strap 9 is wrapped around the waist, respectively, and secured. Then, the left and right lanyard hooks 10 of the lanyard 5 are hooked onto the rest hooks 4, respectively. Secondary equipment, such as an air-conditioned suit, is then worn over the fall arrest device.

[0026] The fall arrest device 1 (lanyard 5) according to this embodiment is configured so that the branch 13 is at approximately the same height as the bottom of the secondary equipment when the user wears the secondary equipment, and the rope 15 branched from the branch 13 is likely to be below the bottom of the secondary equipment, preventing the bottom from rolling up. In addition, the rest hook 4 for engaging the lanyard hook 10 is provided at the height of the user's waist, so that the lanyard hook 10 can be easily attached to and detached from the rest hook 4 when the secondary equipment is worn. This makes it possible to improve the workability and safety of the fall arrest device 1 using the lanyard 5 for the fall arrest device without impairing the performance of the secondary equipment.

[0027] Furthermore, when the user falls while using the fall arrest device 1 according to this embodiment and an impact acts on the lanyard 5, the impact breaks the retaining member 17, causing the bundled rope 15 and shock absorber 12 to deploy, and the impact is absorbed by the elasticity of the rope 15. This makes it possible to prevent a large impact from acting on the user.

[0028] A second embodiment of the fall prevention device 1 according to the present invention is shown in Figs. 5 to 7. The basic configuration of the fall prevention device 1 according to the second embodiment is the same as that of the fall prevention device 1 according to the first embodiment, but differs in that no waist belt 9 is provided. In the second embodiment, the rest hook 4 is provided on the thigh belt 3. As in the first embodiment, this position is near the bottom end of the hem of the secondary equipment such as an air-conditioned suit when the user wears the secondary equipment (see the dashed line in Figs. 6 and 7), and is configured so that the lanyard hook 10 can be easily engaged with the rest hook 4. This improves the workability and safety of the fall prevention device 1 using the lanyard 5 for the fall prevention device. The rest hook 4 can also be provided near the bottom end of the shoulder belt 2 instead of the thigh belt 3.

[0029] The embodiments disclosed herein are illustrative in all respects and should not be considered as limiting. Therefore, the scope of the present invention is defined by the claims, not by the above description, and is intended to include the meaning equivalent to the claims and all modifications. [Explanation of symbols]

[0030] 1 Fall arrest equipment 2. Shoulder Girdle 3 Thigh belt 4. Pause Hook 5 Lanyards 6 Left Belt 7 Right Belt 8 Chest Fixation Material 9. Belt 10 Lanyard Hook 11 Mounting part 12 Shock absorber 13 Branch 14 Hook part 15 Rope 16 Metal fittings 17 Retaining member

Claims

[Claim 1] A shoulder strap (2) that is wrapped around the user's left and right shoulders and reaches the waist, A thigh belt (3) is connected to the lower end of the shoulder belt (2) and is wrapped around the left and right thighs of the user, A rest hook (4) is provided at the same level or lower than the waist height of the user on the shoulder belt (2) or thigh belt (3); Lanyards (5), having The lanyard (5) An attachment portion (11) that is attached to the shoulder belt (2) at a back portion of the shoulder belt (2) that is wrapped around the left and right shoulders of the user, a shock absorber (12) extending downward from the mounting portion (11); a branch portion (13) below the shock absorber (12) and corresponding to the height of the user's waist; a hook portion (14) including a rope (15) branched to the left and right from the branch portion (13) and a lanyard hook (10) provided at the tip of the rope (15); having The lanyard hook (10) is configured to be able to be engaged with the rest hook (4); The seat belt further includes a waist belt (9) that is provided at a height corresponding to the waist of the user. The waist belt (9) and the lanyard (5) are fixed with such a strength that the waist belt (9) and the lanyard (5) are separated when an impact acts on the lanyard (5) during a fall, The rope (15) is bundled by a retaining member (17) below the waist belt (9), and when an impact accompanying a fall occurs, the retention is released and the bundled rope (15) unfolds. This fall arrest device is configured in this manner.

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