Lifting safety fitting, method of using lifting safety fitting, lanyard, and method of using lanyard

Abstract

To provide a safety metal fitting for ascent and descent which does not obstruct work and does not apply an excessive load to a body while using a lifeline which is a second rope.SOLUTION: The lifting safety metal fitting 1 liftably connectable to a main rope 2 includes a body part 11 having a main rope insertion part 111 for inserting the main rope 2, and a claw rotation part for rotating a claw engaged with the main rope 2, and the body part 11 has a life line connection metal fitting 14 to which a life line 3 is connectable. A safety fitting (1) for lifting and lowering, characterized in that a pawl rotating section has a lanyard connecting fitting (13) to which a lanyard (4) can be connected, and a method for using the safety fitting (1) for lifting and lowering, characterized in that a main rope (2) is inserted into a main rope insertion section (111), a lifeline (3) is connected to a lifeline connecting fitting (14), and the lanyard connecting fitting (13) and an operator (5) are connected by a plurality of lanyards (4).SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a lifting safety fitting, a method for using a lifting safety fitting, a lanyard, and a method for using a lanyard. [Background technology]

[0002] When working at heights such as on slopes, on utility poles, steel towers, and in construction work, and when raising or lowering objects or working at a designated location at a height, the worker connects the main rope to a waist belt or the like worn by the worker to prevent falls and to secure the working position. The waist belt and main rope are connected using a lifting safety fitting. The lifting safety fitting is connected to the main rope so that it can be raised and lowered, and the lifting safety fitting and the waist belt are connected with a sub-rope. This allows the worker to be supported in a fixed position on the main rope, allowing them to work safely, and also allows them to ascend and descend by releasing the hook of the lifting safety fitting (see, for example, Patent Document 1). However, since a single main rope does not reliably guarantee safety, it is necessary to connect the worker to another rope as a lifeline. As shown in Figure 5, a lifeline 3 is connected to a harness 52 worn by the worker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication number 2-33795 Summary of the Invention [Problem to be solved by the invention]

[0004] As shown in Figure 5, the lifting safety fitting 1' is connected to the main rope 2 so that it can be raised and lowered, and the lifting safety fitting 1' is connected to two D-rings on the left and right sides of the waist belt 51 worn by the worker 5 with a lanyard 4, so that the worker 5 is supported on the main rope 2. Furthermore, a lifeline 3 suspended from a safety block (retractable fall arrest device) 6 fixed above the work area is connected to a D-ring fixed to the chest of a harness 52 (full harness in Figure 5) worn by a worker 5. The working range 7 of the worker 5 (within the circle shown in FIG. 2) is in front of the body, and the lifeline 3 connected to the chest is located within this working range 7, so it interferes with the work. Furthermore, the lifeline 3 is always in tension due to the safety block 6, which is a retractor-type device, and the worker 5 is in a state where his chest is pulled, making it difficult to work and placing extra strain on his body.

[0005] Therefore, an object of the present invention is to provide a climbing safety fitting that does not get in the way of work and does not place an extra load on the body, even when using a second rope, which is a lifeline. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration. A lifting safety fitting that can be connected to a main rope so that it can be raised and lowered, The main rope hook includes a main body having a main rope insertion portion through which the main rope is inserted, and a pawl rotation portion that rotates a pawl that engages with the main rope, The main body has a lifeline connecting fitting to which a lifeline can be connected, The claw rotation portion has a lanyard connecting fitting to which a lanyard can be connected. A lifting safety fitting characterized by: The present invention also has the following configuration. A method of using the lifting safety fittings, The main rope is inserted into the main rope insertion portion, The lifeline is connected to the lifeline connecting fitting, A method of using a climbing safety fitting, characterized in that the lanyard connecting fitting and the worker are connected by a plurality of lanyards.

[0007] The present invention also has the following configuration. A lanyard connected to a lifting safety fitting, A hook is attached to one end and a ring is attached to the other end A lanyard characterized by: The present invention also has the following configuration. A method of using the lanyard, in which the lanyard is used together with an ascent safety fitting that can be connected to a main rope so as to be able to ascend and descend, The climbing safety fitting comprises a main body having a main rope insertion portion through which the main rope is inserted, and a pawl rotation portion that rotates a pawl that engages with the main rope, and the pawl rotation portion has a lanyard connecting fitting to which a lanyard can be connected, The main rope is inserted into the main rope insertion portion, The lanyard connecting fitting and the worker are connected by a lanyard different from the lanyard, The lanyard has the hook connected to the worker and the ring connected to a lifeline, A method of using a lanyard, characterized in that the ring and the lanyard connecting fitting are connected by a detachable connecting device. [Effects of the Invention]

[0008] The lifting safety fittings, method of using the lifting safety fittings, lanyard and method of using the lanyard of the present invention are configured to have a lifeline connecting fitting to which a lifeline can be connected, and are configured to connect the lifeline to the lanyard connecting fitting, so that even while using a second rope, the lifeline, it does not get in the way of work and does not place any extra strain on the body. Furthermore, by connecting two ropes, the main rope and the lifeline, to the lifting safety fittings and connecting the lifting safety fittings to the worker with two lanyards, even greater safety can be ensured. In addition, the retractable device ensures that the lifeline is always at the minimum necessary length, and even when the lifting safety fitting is raised or lowered along the main rope, the lifeline does not slacken. However, because the lifting safety fitting and the worker are loosely connected by a second lanyard, the lifeline does not get in the way of work, does not place any extra strain on the body, and safety is ensured. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing a lifting safety fitting 1 according to a first embodiment of the present invention. [Figure 2] 1A to 1C are diagrams showing how to use the lifting safety fitting 1 of the first embodiment according to the present invention. [Figure 3] 10 is a view showing a third lanyard 43 according to a second embodiment of the present invention. FIG. [Figure 4] 10A and 10B are diagrams showing how to use the third lanyard 43 of the second embodiment according to the present invention. [Figure 5] 1A and 1B are diagrams showing how to use a conventional climbing safety fitting 1' and a lifeline 3. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Embodiment 1] Hereinafter, a lifting safety fitting 1 according to a first embodiment of the present invention and a method for using the lifting safety fitting 1 will be described with reference to the drawings. In the following description, the same reference numerals in different drawings indicate parts with the same functions, and duplicated descriptions in each drawing will be omitted as appropriate.

[0011] [Lifting safety fittings] FIG. 1 is a diagram showing a climbing safety fitting 1 according to a first embodiment of the present invention. The lifting safety fitting 1 has a main body 11 having a main rope insertion portion 111 through which the main rope 2 is inserted, an engaging claw (not shown) that engages with the main rope 2, and a triple link 12 for rotating the engaging claw. The main rope 2 is inserted through the main rope insertion portion 111 of the main body 11 so as to be movable in the front-to-rear direction (left-to-right in FIG. 1). The main body 11 is provided with rotatable engaging claws that engage with the main rope 2 in the main rope insertion portion 111 and secure the climbing safety fitting 1 at a predetermined position on the main rope 2. In this embodiment, the engaging claws are provided at two positions on the main body 11 in the front-to-rear direction. The two engaging claws have ends opposite to the claw portion (not shown) that engages with the main rope 2, and are connected by an operating rod 121 to form a triple link 12. In addition, the two engaging claws are each biased by a spring (not shown) so that the claw portion rotates in the direction of engaging with the main rope 2.

[0012] In the first embodiment, when the operating rod 121 is moved rearward (toward the worker 5), the claw portion rotates in a direction to engage with the main rope 2. The worker 5 grasps the main rope 2 with one hand and moves the operating rod 121 forward (away from the worker 5) with the other hand to release the engagement between the claw portion and the main rope 2. In this state, if the operating rod 121 is further moved forward by hand, the lifting safety fitting 1 including the main body 11 moves forward. If the lifting safety fitting 1 is moved to a predetermined position on the main rope 2 and the worker releases his / her hand from the operating rod 121 or moves the operating rod 121 rearward by hand, the claw portion engages with the main rope 2, and the lifting safety fitting 1 is fixed in a predetermined position on the main rope 2. Conversely, when the operating rod 121 is moved rearward by hand with the engagement between the claw portion and the main rope 2 released, the lifting safety fitting 1 including the main body 11 moves rearward. When the lifting safety fitting 1 has been moved to a predetermined position on the main rope 2 and the operating rod 121 is released or moved rearward by hand, the claw portion engages with the main rope 2, and the lifting safety fitting 1 is fixed in a predetermined position on the main rope 2. In the first embodiment, two engaging claws are provided, but the number of engaging claws may be one, or three or more. In addition, the operating mechanism for operating the engaging claws can be designed appropriately depending on the number, shape, structure, etc. of the engaging claws.

[0013] A lanyard connecting fitting 13 for connecting the first lanyard 41 is attached to the rear of the operating rod 121. When the worker's weight is applied to the first lanyard 41, the lanyard connecting fitting 13 is pulled rearward, which in turn pulls the operating rod 121 rearward. As described above, when the operating rod 121 moves rearward, the claw portion engages with the main rope 2, and when a load is applied to the first lanyard 41, the claw portion engages more firmly with the main rope 2, so that the lifting safety fitting 1 is firmly fixed to the main rope 2 and the worker is reliably prevented from falling.

[0014] A lifeline connecting fitting 14 for connecting the lifeline 3 is attached to the front of the main body 11. In this embodiment, the lifeline connecting fitting 14 is formed in a substantially U-shape. The claw rotation part is attached to a mounting fixture that rotatably mounts the claw rotation part to the main body part 11. The shape of the lifeline connecting fitting 14 is not limited to an approximately U-shape, and may be any other shape as long as the lifeline 3 can be connected to it, and the lifeline connecting fitting 14 may be attached to a location other than the mounting fixture that rotatably attaches the claw rotation part. In addition, a second lanyard connecting fitting for connecting a second lanyard 42 may be separately attached to the rear of the main body 11 in addition to the lanyard connecting fitting 13.

[0015] [How to use the lifting safety bracket] A method of using the lifting safety fitting 1 of the first embodiment will be described with reference to FIG. 2A and 2B are diagrams showing how to use the lifting safety fitting 1 of the first embodiment of the present invention, where (a) is a diagram seen from above the worker 5, and (b) is a diagram seen from the left of the worker 5. As described above, the main rope 2 is inserted into the main rope insertion portion 111 of the main body 11 of the climbing safety fitting 1 so as to be movable in the front-rear direction (left-right direction in FIG. 1). The first lanyard 41 is inserted through the lanyard connector 13 and has both ends connected to two D-rings attached to the left and right sides of the waist belt 51 of the worker 5. That is, the first lanyard 41 supports the worker 5 at two points on the waist. During normal work, the body of the worker 5 is supported by the first lanyard 41, the lifting safety fitting 1, and the main rope 2. The length of the first lanyard 41 may be adjustable using a hook (hook hook, adjuster) or the like. The main rope 2 and the first lanyard 41 allow the worker 5 to fix the position of his / her body at a predetermined work location.

[0016] A lifeline 3 suspended from a safety block 6 is connected to the lifeline connecting fitting 14 of the lifting safety fitting 1. The lifeline 3 is always kept to the minimum required length by the safety block 6, which is a retractable device, so that the lifeline 3 does not slacken even when the lifting safety fitting is raised or lowered along the main rope, and the lifting safety fitting 1 does not interfere with work even when it is raised or lowered along the main rope 2. Furthermore, if a problem occurs with the main rope 2 or the first lanyard 41 and a load is applied to the lifeline 3, the lifeline 3 is fixed by the safety block 6. In addition, a second lanyard 42 has one end connected to the lanyard connecting fitting 13 and the other end connected to a D-ring attached to the chest of the harness 52 of the worker 5. That is, the lifeline 3 and second lanyard 42 constitute a rope separate from the main rope 2 and first lanyard 41, more reliably preventing the worker 5 from falling. Furthermore, since the second lanyard 42 is also connected to the lanyard connecting fitting 13, it does not significantly interfere with the work of the worker 5 within the work area 7 (within the circle shown in Figure 2) compared to the conventional lifeline 3 shown in Figure 3.

[0017] The second lanyard 42 only needs to support the body of the worker 5 when a malfunction occurs in the main rope 2 or the first lanyard 41, so there is no need to pull the body of the worker 5 during normal work.If the lifting safety fittings 1 and the harness 52 are connected in a slightly loose state, no strain is placed on the body of the worker 5, making it easier to work. It is preferable that the length of the second lanyard 42 can be adjusted by a hook (hook hook, adjuster) or the like. In the above description, the second lanyard 42 is connected to the lanyard connector 13 together with the first lanyard 41, but the first lanyard 41 may be connected to the lanyard connector 13, and the second lanyard 42 may be connected to the second lanyard connector. Also, the second lanyard 42 may be attached to a location other than the chest portion of the harness 52.

[0018] [Embodiment 2] Hereinafter, a third lanyard 43 according to a second embodiment of the present invention and a method of using the third lanyard 43 will be described with reference to the drawings. In the following description, the same reference numerals in different drawings indicate parts with the same functions, and duplicated descriptions in each drawing will be omitted as appropriate. The second embodiment differs from the first embodiment in that the safety block 6 is connected to a third lanyard 43 instead of the lifeline connecting fitting 14 .

[0019] The main rope 2, lifeline 3, first lanyard 41, waist belt 51, harness 52, and safety block 6 are the same as those in the first embodiment. The lifting safety fittings used are conventional lifting safety fittings 1' (see Figure 5). Note that the conventional lifting safety fittings 1' are the same as the lifting safety fittings 1 of embodiment 1, minus the lifeline connecting fittings 14, and therefore in the following explanation, the names and symbols of the components of the lifting safety fittings 1' will be the same as those of the lifting safety fittings 1.

[0020] [Third lanyard] FIG. 3 is a diagram showing a third lanyard 43 according to a second embodiment of the present invention. Third lanyard 43 has hook 431 attached to one end and O-ring 432 attached to the other end. Note that the third lanyard 43 is not limited to O-ring 432, and may be any other ring-shaped member. As will be described later, the hook 431 is connected to one D-ring attached to the chest of the harness 52 of the worker 5. The O-ring 432 is connected to the lanyard connecting fitting 13 of the climbing safety fitting 1' via a connecting member 8. The connecting member 8 can be an easily detachable member such as a carabiner or a shackle.

[0021] [How to use the lifting safety bracket] A method of using the third lanyard 43 of the second embodiment will be described with reference to FIG. 4A is a view from the left of the worker 5, and FIG. 4B is an enlarged view of the vicinity of the lifting safety fitting 1'. As in the first embodiment, the main rope 2 is inserted into the main rope insertion portion 111 of the main body 11 of the climbing safety fitting 1' so as to be movable in the front-rear direction (left-right direction in FIG. 4). The first lanyard 41 is inserted through the lanyard connector 13 and has both ends connected to two D-rings attached to the left and right sides of the waist belt 51 of the worker 5. That is, the first lanyard 41 supports the worker 5 at two points on the waist. During normal work, the body of the worker 5 is supported by the first lanyard 41, the lifting safety fitting 1', and the main rope 2. The length of the first lanyard 41 may be adjustable by means of a hook (hook hook, adjuster) or the like. The main rope 2 and the first lanyard 41 allow the worker 5 to fix the position of his / her body at a predetermined work location.

[0022] The third lanyard 43 has a hook 431 at one end connected to a D-ring attached to the chest of the worker's 5 harness 52. The O-ring 432 at the other end is detachably connected to the lanyard connecting fitting 13 using a connecting member 8. The lifeline 3 suspended from the safety block 6 is connected to the O-ring 432 . The lifeline 3 and the third lanyard 43 form a rope separate from the main rope 2 and the first lanyard 41, thereby more reliably preventing the worker 5 from falling. In addition, the third lanyard 43 is also connected to the lanyard connecting fitting 13 via a connecting member 8, so compared to the conventional lifeline 3 shown in Figure 5, it does not significantly interfere with the work of the worker 5 within the work range 7 (within the circle shown in Figure 2). Furthermore, since the third lanyard 43 only needs to support the body of the worker 5 when a malfunction occurs in the main rope 2 or the first lanyard 41, there is no need to pull the body of the worker 5 during normal work.If the lifting safety fitting 1' and the harness 52 are connected in a slightly loose state, no strain is placed on the body of the worker 5, making it easier to work.

[0023] It is preferable that the third lanyard 43 be designed so that its length can be adjusted using a hook (hook hook, adjuster) or the like. Alternatively, the configuration may be changed so that connecting member 8 is connected to lanyard connecting fitting 13, and a third lanyard connecting fitting that connects connecting member 8 to the rear of main body 11 may be attached separately in addition to lanyard connecting fitting 13, and connecting member 8 may be connected to the third lanyard connecting fitting. Furthermore, hook 431 of third lanyard 43 may be attached to a location other than the chest portion of harness 52.

[0024] The above has described in detail the lifting safety fittings 1 and method of using the lifting safety fittings 1 of embodiment 1 of the present invention, and the third lanyard 43 and method of using the third lanyard 43 of embodiment 2 with reference to the drawings. However, the specific configurations are not limited to these embodiments, and design changes that do not deviate from the gist of the present invention are also included in the present invention. Furthermore, the above-described first and second embodiments can be combined by utilizing the techniques of each other, as long as there are no particular contradictions or problems in the purpose, configuration, and the like. [Explanation of symbols]

[0025] 1, 1' Lifting safety bracket 11 Main body 111 Main rope insertion part 12 Triple Link 121 Operation rod 13 Lanyard connecting hardware 14 Lifeline connector 2 Main Rope 3. Lifeline 4 lanyards 41 No. 1 Lanyard 42 No. 2 Lanyard 43 Third Lanyard 431 Hook 432 O-ring 5. Workers 51 Waist belt 52 Harness 6 Safety Block 7. Scope of Work 8 Connecting members

Claims

1. A lifting safety fitting that can be connected to a main rope so that it can be raised and lowered, The main rope hook includes a main body having a main rope insertion portion through which the main rope is inserted, and a pawl rotation portion that rotates a pawl that engages with the main rope, The main body has a lifeline connecting fitting to which a lifeline can be connected, The claw rotation portion has a lanyard connecting fitting to which a lanyard can be connected. A lifting safety fitting characterized by:

2. 2. The climbing safety fitting according to claim 1, wherein the lifeline connecting fitting is attached to a fixture that rotatably attaches the claw rotation portion to the main body portion.

3. 3. The climbing safety fitting according to claim 1, further comprising a second lanyard connecting fitting different from the lanyard connecting fitting.

4. A method of using the lifting safety fitting according to claim 1 or 2, The main rope is inserted into the main rope insertion portion, The lifeline is connected to the lifeline connecting fitting, A method of using a climbing safety fitting, characterized in that the lanyard connecting fitting and the worker are connected by a plurality of lanyards.

5. A method of using the lifting safety fitting according to claim 3, comprising: The main rope is inserted into the main rope insertion portion, The lifeline is connected to the lifeline connecting fitting, A method of using a climbing safety fitting, characterized in that the lanyard connecting fitting and the worker, and the second lanyard connecting fitting and the worker are each connected by a lanyard.

6. A lanyard connected to a lifting safety fitting, A hook is attached to one end and a ring is attached to the other end A lanyard characterized by:

7. A method of using the lanyard according to claim 6 together with an ascent safety fitting that can be connected to a main rope so as to be able to ascend and descend, The climbing safety fitting includes a main body having a main rope insertion portion through which the main rope is inserted, and a pawl rotation portion that rotates a pawl that engages with the main rope, and the pawl rotation portion has a lanyard connecting fitting to which a lanyard can be connected, The main rope is inserted into the main rope insertion portion, The lanyard connecting fitting and the worker are connected by a lanyard different from the lanyard, The lanyard has the hook connected to the worker and the ring connected to a lifeline, A method of using a lanyard, characterized in that the ring and the lanyard connecting fitting are connected by a detachable connecting device.

8. The lifting safety fitting further includes a second lanyard connector different from the lanyard connector, 8. A method for using a lanyard according to claim 7, wherein the ring is connected to the second lanyard connecting fitting instead of the lanyard connecting fitting by the detachable connecting device.

Images