CN112439138B - Insulating hook, insulating brake rod for hook and manufacturing method of insulating hook - Google Patents

Abstract

An insulating hook is characterized in that the free end of the insulating brake lever includes a first insulating section and a second insulating section, and the color of the second insulating section is different from that of the first insulating section; Axial movement of the brake rod; when the free end of the insulating brake rod abuts against the abutting part of the insulating main body, and the insulating limit sleeve completely covers the second insulation section, the insulating limit sleeve is in a safe position, and the insulating brake rod It cannot pivot freely; otherwise, if the insulating limiting sleeve exposes at least a part of the second insulating section, the insulating limiting sleeve is at the warning position. The user can judge whether the insulating limit sleeve of the insulating hook has been adjusted to a safe position by directly seeing the color of the second insulating segment, thereby ensuring the personal safety of the user. An insulating brake rod and its manufacturing method are also disclosed herein.

Description

Insulated hook, insulating brake lever for the hook and manufacturing method thereof

technical field

The invention relates to a hook; in particular, it refers to an insulating hook, an insulating brake lever used for the hook and a manufacturing method thereof.

Background technique

For high-altitude workers or extreme sports players, safety belts and safety hooks have been widely used in related work fields, and have a direct impact on the life safety of the above-mentioned users.

For example, high-altitude workers (such as construction workers, electric maintenance personnel, high-rise glass cleaners, etc.) must perform specific work at high altitudes for a long time due to work requirements, and must wear safety protective gear (such as safety Caps, the above-mentioned safety belts and safety hooks, etc.); However, even if the workers at heights have complied with the safety regulations and wear safety protective gear, industrial safety accidents in which workers at heights fall still occur from time to time, causing loss of life and property.

In addition, extreme sports (such as bungee jumping, hang gliding, skydiving, etc.) have become popular in recent years, attracting many players to try such extremely risky sports; The inspection of safety equipment is negligent, and a fall accident occurs, causing serious personal injury or even death.

A close inspection of some of the causes shows that the safety hooks of the above-mentioned safety protective gear or safety equipment are not properly locked and fastened in accordance with the regulations, so that when workers working at heights perform high-altitude operations or extreme sports players perform extreme sports, the above-mentioned safety protective gear or safety equipment does not fit properly. The safety hook buckle is loosened, and then the fall of the person working at heights or the extreme sports player occurs.

Therefore, general safety clasp still has obvious defective, needs solution urgently.

Contents of the invention

In view of this, the object of the present invention is to provide an insulating hook, which uses the color difference between the second insulating section and the first insulating section and a simple safety checking method, so that the user can simply identify whether the insulating hook has been locked correctly. It is solidly in a safe state, thereby protecting the personal safety of users.

In order to achieve the above object, the present invention provides an insulating hook, comprising: an insulating body having a pivot portion and an abutting portion respectively located at two different ends of the insulating body; an insulating gate lever having a a pivot end, a free end and an external thread section, wherein the external thread section is located between the pivot end and the free end; part, so that the insulating gate lever can pivot relative to the insulating main body; the free end can be operatively abutted against or away from the abutting part of the insulating main body; the free end includes a first insulating segment and a second insulating segment, the second insulating segment is located between the first insulating segment and the external thread segment, and the color of the second insulating segment is different from that of the first insulating segment; and an insulating limiting sleeve has an inner A threaded segment, the insulating limit sleeve is sleeved on the insulating gate rod, the internal thread segment and the external thread segment of the insulating gate rod are screwed together, and the insulating limit sleeve can be operated to rotate, Make the insulating limit sleeve move along the axial direction of the insulating brake rod; when the free end is in contact with the abutting portion of the insulating main body and the insulating limit sleeve completely covers the When the two insulating sections and the abutting portion of the insulating main body cover at least a part, the insulating limiting sleeve is defined to be in a safe position, and the insulating gate lever cannot pivot freely; when the free end is in contact with the When the abutting portion of the insulating main body and the insulating limiting sleeve expose at least a part of the second insulating segment of the insulating brake rod, the insulating limiting sleeve is defined to be located at a warning position.

Another object of the present invention is to provide an insulating brake lever for a hook, which includes a brake lever core material, a first insulating layer and a second insulating layer, and the brake lever core material includes a free end and a pivot The first insulating layer is arranged on the surface of the brake rod core material, and the first insulating layer forms an external thread segment between the free end and the pivot end; wherein the first insulating layer is on the The free end includes a first insulating section and a second insulating section, the second insulating section is located between the first insulating section and the external thread section, and the first insulating layer is coated corresponding to the first insulating section The brake rod core material and cover a part of the brake rod core material corresponding to the second insulating section, and the second insulating layer covers the first insulating layer and the gate corresponding to the second insulating section Rod core material, and the color of the second insulating segment is different from the color of the first insulating segment.

Another object of the present invention is to provide a method for manufacturing an insulating brake lever for a hook, which includes at least the following steps:

A core material and a first mold are provided, the core material is arranged in a first cavity of the first mold, the core material has a first core material segment, a second core material segment and a first core material segment Three core material sections, and the first mold cavity has a first area, a second area and a third area; wherein the first core material section is arranged in the first area, and the second core material The section is arranged in the second area, and the third core section is arranged in the third area; there is a first pouring space between the first core section and the inner wall of the first area , there is a second pouring space between the second core section and the inner wall of the second region, and there is a third pouring space between the third core section and the inner wall of the third region, wherein the the second pouring space communicates with the first pouring space and the third pouring space;

Pouring a first insulating material into the first mold cavity, the first insulating material fills the first pouring space, the second pouring space and the third pouring space, forming a first insulating layer on the surface of the core material on, to obtain an intermediate;

The intermediate body has a first intermediate body section, a second intermediate body section and a third intermediate body section, when the intermediate body is placed in a second mold cavity of the second mold, the first The intermediate body section and the third intermediate body section are in close contact with the inner wall of the second mold cavity, and there is a fourth pouring space between the second intermediate body section and the inner wall of the second mold cavity; and

pouring a second insulating material into the fourth pouring space, the second insulating material filling the fourth pouring space, on the surface of the first insulating layer and the core material corresponding to the second intermediate body section, A second insulating layer is formed to obtain the insulating gate rod.

The effect of the present invention is that, through the different colors of the second insulation section and the first insulation section and the simple safety check method, it is convenient for the user to easily identify whether the insulation hook has been correctly locked in a safe state, thereby protecting the user's personal safety. Safety. In addition, the entire outer surface of the insulating hook provided by the present invention is covered with insulating material, so as to prevent the hook from being inductive or conductive, thereby providing further safety protection for electric maintenance personnel.

Description of drawings

Fig. 1 is a perspective view of an insulating hook according to a preferred embodiment of the present invention.

FIG. 2 is an exploded view of the insulating hook of FIG. 1 .

FIG. 3A is a schematic diagram of an insulating body core material of a hook according to a preferred embodiment of the present invention.

FIG. 3B is a schematic diagram of a part of the core material of the insulating body covered by an insulating layer according to a preferred embodiment of the present invention.

3C is a schematic diagram of another part of the core material of the insulating body covered by an insulating layer according to a preferred embodiment of the present invention.

FIG. 4 is a flow chart of a method for manufacturing an insulating brake rod of a hook according to a preferred embodiment of the present invention.

Fig. 5A is a schematic diagram of an insulating gate rod core material according to a preferred embodiment of the present invention.

5B is a schematic diagram of a part of the core material of the insulating gate rod covered by the first insulating layer according to a preferred embodiment of the present invention.

5C is a schematic diagram of another part of the core material and a part of the first insulating layer of the insulating gate rod covered by the second insulating layer according to a preferred embodiment of the present invention.

Fig. 6A is a schematic diagram of the structure of the core material of the insulating brake lever cooperating with the first mold according to a preferred embodiment of the present invention.

FIG. 6B is a cross-sectional view of FIG. 6A.

Fig. 7A is a structural schematic diagram of the cooperation between the intermediate body of the insulating gate rod and the second mold according to a preferred embodiment of the present invention.

FIG. 7B is a cross-sectional view of FIG. 7A.

FIG. 8A is a schematic diagram of the core material of the insulation limiting sleeve of the hook according to a preferred embodiment of the present invention.

8B is a schematic diagram of a part of the core material of the insulating limiting sleeve covered by the first insulating layer according to a preferred embodiment of the present invention.

8C is a schematic diagram of another part of the core material and a part of the first insulating layer covered by the second insulating layer of the insulating limiting sleeve according to a preferred embodiment of the present invention.

FIG. 9A is an exploded view of some components of the insulating hook of FIG. 1 .

FIG. 9B is a partially enlarged view of FIG. 9A.

detailed description

Please refer to FIG. 1, FIG. 2 and FIG. 9A. FIG. 1 is a perspective view of an insulating hook 1 according to a preferred embodiment of the present invention. FIG. 2 is an exploded view of components of the insulating hook 1 of FIG. 1, and FIG. An exploded view of some components of the insulating hook 1. In FIG. 1 , FIG. 2 and FIG. 9A , the insulating hook 1 includes an insulating main body 10 , an insulating gate lever 20 , an insulating limiting sleeve 30 and a pivot 40 .

The insulating body 10 has a pivoting portion 12 and an abutting portion 14 respectively located at two different ends of the insulating body 10 . The insulating brake lever 20 has a pivot end 22 , a free end 24 and an external thread section 26 , wherein the external thread section 26 is located between the pivot end 22 and the free end 24 .

The insulating gate lever 20 is pivotally connected to the pivoting portion 12 of the insulating main body 10 through the pivot end 22 , so that the insulating gate lever 20 can pivot relative to the insulating main body 10 . The free end 24 is operable to abut against or move away from the abutting portion 14 of the insulating body 10 . The free end 24 includes a first insulating section 242 and a second insulating section 244, wherein the second insulating section 244 is located between the first insulating section 242 and the external thread section 26, and the color of the second insulating section 244 is different from that of the first insulating section 244. The color of segment 242.

The insulating limiting sleeve 30 is sheathed on the insulating gate rod 20 . The insulating limiting sleeve 30 has an internal thread section (not shown), and the internal thread section and the external thread 26 section of the insulating gate rod 20 are screwed together. The insulating limiting sleeve 30 can be operated to rotate, so that the insulating limiting sleeve 30 moves along the axial direction AX of the insulating brake rod 20 .

When the free end 24 abuts against the abutting portion 14 of the insulating main body 10 and the insulating limiting sleeve 30 completely covers the second insulating section 244 of the insulating gate rod 24 and covers at least a part of the abutting portion 14 of the insulating main body 10 , The insulating limit sleeve 30 is defined to be located at a safe position, as shown in FIG. 1 , and the insulating gate lever 30 cannot pivot freely. When the free end 24 is in contact with the abutment portion 14 of the insulating body 10, and the insulating limiting sleeve 30 exposes at least a part of the second insulating section 244 of the insulating gate rod 20, the insulating limiting sleeve 244 is defined to be located at a The warning position is shown in Figure 9A. In the embodiment of the present invention, through the different colors of the second insulating section 244 and the first insulating section 242 and a simple safety check method, the user can simply identify whether the insulating hook 1 has been correctly locked in a safe state, thereby ensuring User's personal safety. In addition, the entire outer surface of the insulating hook 1 provided by the present invention is covered with insulating material to prevent the hook 1 from being inductive or conductive, thereby providing further safety protection for electric maintenance personnel.

In the embodiment of the present invention, when the free end 24 of the insulating gate rod 20 is in contact with the abutting portion 14 of the insulating body 10, and the insulating limiting sleeve 30 is at the warning position, at least a part of the insulating limiting sleeve 30 is exposed. The second insulating section 244 of the insulating gate rod 20 , and the free end 24 of the insulating gate rod 20 cannot abut against the abutting portion 14 of the insulating main body 10 stably.

In the embodiment of the present invention, the free end 24 of the insulating gate rod 20 is in contact with the abutting portion 14 of the insulating main body 10, and when the insulating limiting sleeve 30 is at the warning position, at least a part of the insulating limiting sleeve 30 is exposed. The second insulating section 244 of the insulating gate lever 20 is insulated, and the insulating gate lever 20 can pivot freely relative to the insulating main body 10 .

Please refer to FIG. 3A to FIG. 3C together. The insulating body 10 includes a main body core material 11 and a main body insulating layer 13 , wherein the main body insulating layer 13 covers the main body core material 11 . The main body insulating layer 13 does not completely cover the main body core material 11 of the insulating main body 10 located at the abutting portion 14 , so that a part of the main body core material 11 located at the abutting portion 14 is exposed outward, as shown in FIG. 3C . In FIG. 3A, the main body core material 11 includes a pivot portion 12 and an abutment portion 14, and the abutment portion 14 has an outer surface 142; then in FIG. 3B, the left half of the main body core material 11 is clamped in the mold (not shown), the right half of the main body core material 11 is suspended in the mould, and an insulating layer 13 is formed on the surface of the right half of the main body core material 11; then in FIG. 3C, the insulating layer has been coated The right half of the main body core material 11 of 13 is clamped in another mold, the left half of the main body core material 11 is suspended in the other mold, and formed on the surface of the left half of the main body core material 11 insulating layer 13. A part of the outer surface 142 of the abutting portion 14 of the insulating body 10 is not covered by the insulating layer 13 , but exposed outward.

Please refer to FIG. 4 to FIG. 7B together. FIG. 4 is a flow chart of a method for manufacturing an insulating brake rod of a hook according to a preferred embodiment of the present invention, which includes at least the following steps:

Step S01 : providing the core material 21 of the insulating brake rod 20 and the first mold 50 , the core material 21 is disposed in the first mold cavity 52 of the first mold 50 . The core material 21 has a first core material section 212, a second core material section 214 and a third core material section 216, and the first mold cavity 52 has a first area, a second area and a third area, wherein the first The core material segment 212 is disposed in the first region, the second core material segment 214 is disposed in the second region, and the third core material segment 216 is disposed in the third region. There is a first pouring space 522 between the first core material section 212 and the inner wall of the first region, and there is a second pouring space 524 between the second core material section 214 and the inner wall of the second region, and the third core material region There is a third pouring space 526 between the section 216 and the inner wall of the third region, wherein the second pouring space 524 communicates with the first pouring space 522 and the third pouring space 526;

Step S02: Pouring the first insulating material into the first mold cavity 52, filling the first pouring space 522, the second pouring space 524 and the third pouring space 526 with the first insulating material, forming the first insulating layer 23 on the core material 21 On the surface, to obtain intermediate 21', as shown in Figure 5B;

Step S03: The intermediate body 21' has a first intermediate body section 212', a second intermediate body section 214' and a third intermediate body section 216', and the intermediate body 21' is placed on the second mold of the second mold 60 When inside the cavity 62, the first intermediate body section 212' and the third intermediate body section 216' are in close contact with the inner wall of the second mold cavity 62, while the second intermediate body section 214' is in close contact with the inner wall of the second mold cavity 62 There is a fourth pouring space 622 therebetween;

Step S04: Pouring the second insulating material into the fourth casting space 622, the second insulating material fills the fourth casting space 622, on the surface of the first insulating layer 23 and the core material 21 corresponding to the second intermediate section 214' On top, a second insulating layer 25 is formed to obtain an insulating gate bar 20 .

In FIG. 5A, the core material 21 has a first core material segment 212, a second core material segment 214 and a third core material segment 216 in sequence from the free end 24 to the pivotal end 22, and the first core material segment The combination of the segment 212 and the second core segment 214 has a groove 211, and the groove 211 has an inner surface.

In FIG. 6A, there is a first casting space 522 between the first core material segment 212 and the inner wall of the first region, and a second casting space 524 between the second core material segment 214 and the inner wall of the second region, and There is a third casting space 526 between the third core section 216 and the inner wall of the third region, wherein the second casting space 524 communicates with the first casting space 522 and the third casting space 526 . In the embodiment of the present invention, the first mold 50 has a casting hole 54 communicating with the third region of the first cavity 52 (ie, the third casting space 526 ). In the embodiment of the present invention, the first insulating material is injected into the third area of the first cavity 52 through the casting hole 54, and flows through and fills the third casting space 526, the second casting space 524 and the first casting space in sequence. Space 522.

In FIG. 5A, the first core segment 212 has a first core outer surface, the second core segment 214 has a second core outer surface, and the third core segment 216 has a third core outer surface. . The first insulating layer 23 covers the outer surface of the first core material, the outer surface of the third core material and a part of the outer surface of the second core material, and the first insulating layer 23 is formed on the outer surface of the third core material segment 216 The external thread segment 26 is shown in Fig. 5B.

In Fig. 6B, the first mold 50 includes an upper mold 50a and a lower mold 50b that can be butted against each other, wherein the upper mold 50a is in contact with the inner surface and part of the outer surface of the groove 211 of the core material 21, and the lower mold 50b is in contact with the second mold 50b. There is a second pouring space 524 between the two core material sections 214 . When pouring the first insulating material into the first mold cavity 52 through the pouring hole 54 , the first insulating material fills the second pouring space 524 to form the first insulating layer 23 on the surface of the second core section 214 .

Next, in FIG. 7A, the intermediate body 21' has a first intermediate body segment 212', a second intermediate body segment 214' and a third intermediate body segment 216', and the intermediate body 21' is arranged on the second mold 60 When inside the second mold cavity 62, the first intermediate body section 212' and the third intermediate body section 216' are in close contact with the inner wall of the second mold cavity 62, while the second intermediate body section 214' is in close contact with the second mold cavity There is a fourth pouring space 622 between the inner walls of the cavity 62 .

In Fig. 7B, the second mold 60 includes an upper mold 60a and a lower mold 60b that can be docked with each other, wherein the upper mold 60a is in contact with the inner surface of the groove 211 of the intermediate body 21', and is in contact with the second mold of the intermediate body 21'. The outer surface of the intermediate body section 214' has a fourth casting space 622; the fourth casting space 622 is formed between the lower mold 60b, the first insulating layer 23 and the second intermediate body section 214'. When pouring the second insulating material into the second mold cavity 62 through the pouring hole 64, the second insulating material fills the fourth pouring space 622, forming the second insulating layer 25 between the first insulating layer 23 and the second core material segment 214 on the outer surface to obtain an insulating gate rod 20 . In the embodiment of the present invention, the second insulating layer 25 covers the first insulating layer 23 corresponding to the second core section 214 and the entire outer surface of the second core.

In the embodiment of the present invention, at least a part of the inner surface of the groove 211 is not covered by at least one of the first insulating layer 23 and the second insulating layer 25 . In the embodiment of the present invention, the free end 24 has an outer surface, and the first insulating layer 23 covers the entire outer surface of the free end 24 corresponding to the first insulating segment 242 to form the first insulating segment 242; the first insulating layer 23 covers a part of the outer surface corresponding to the free end 24 of the second insulating segment 244, and the second insulating layer 25 covers the entire outer surface of the first insulating layer 23 and the free end 24 corresponding to the second insulating segment 244, to form the second insulating segment 244 . In short, the second insulating section 244 includes a first insulating layer 23 and a second insulating layer 25, the first insulating layer 23 partially covers the gate rod core material 21 corresponding to the second insulating section 244, and the second insulating layer 25 is to completely cover the brake rod core material 21 and the first insulating layer 23 . In the embodiment of the present invention, the color of the second insulation section 244 is different from the color of the external thread section 26 . In the embodiment of the present invention, the color of the first insulation section 242 is the same as that of the external thread section 26 and the pivot section 22 . In the embodiment of the present invention, the material and color of the first insulating layer 23 are the same as the material and color of the first insulating segment 242 and the material and color of the external thread segment 26 .

To sum up, the insulating gate rod 20 includes a gate rod core material 21 , a first insulating layer 23 and a second insulating layer 25 . The brake rod core material 21 includes a free end 24 and a pivoted end 22. The first insulating layer 23 is disposed on the surface of the brake rod core material 21, and the first insulating layer 23 forms an outer layer between the free end 24 and the pivoted end 22. Thread segment 26. The first insulation layer 23 includes a first insulation section 242 and a second insulation section 244 at the free end 24 , and the second insulation section 244 is located between the first insulation section 242 and the external thread section 26 . The first insulating layer 23 covers the brake rod core material 21 corresponding to the first insulating segment 242 and covers a part of the brake rod core material 21 corresponding to the second insulating segment 244, while the second insulating layer 25 covers the corresponding The first insulation layer 23 and the door rod core material 21 of the second insulation section 244 are different in color from the first insulation section 242 .

Please refer to Fig. 8A to Fig. 8C, the insulating limit sleeve 30 comprises the collar core material 31, the first collar insulating layer 33 and the second collar insulating layer 35, the first collar insulating layer 33 and the second collar insulating layer Layer 35 wraps around collar core material 31 . In FIG. 3A, the collar core material 31 has an outer surface 312 and an internal thread 32; then in FIG. 3B, the right half of the collar core material 31 is clamped in a mold (not shown), so that the collar core The left half of the material 31 is suspended in the mold, and the first collar insulating layer 33 is formed on the outer surface 312 of the left half of the collar core material 31; then in FIG. 3C, the first collar insulating layer has been coated. The collar core material 31 of the layer 33 is clamped in another mold having a plurality of positioning ribs, the collar core material 31 coated with the first collar insulating layer 33 is suspended in the other mold, and The second collar insulating layer 35 is formed on the outer surface 312 of the collar core material 31 covered with the first collar insulating layer 33 and the first collar insulating layer 33 . In the embodiment of the present invention, the second collar insulating layer 35 has a plurality of grooves 352 annularly recessed on the surface of the second collar insulating layer 35 . In the embodiment of the present invention, a part of the first collar insulating layer 33 is exposed to the opening of the groove 352 of the second collar insulating layer 35 . In the embodiment of the present invention, the color of the first collar insulating layer 33 is different from the color of the second collar insulating layer 35, so the color of the first collar insulating layer 33 can be obtained from the groove of the second collar insulating layer 35. 352 openings are exposed.

Next please refer to FIG. 2 and FIG. 9A, the pivotal end 22 of the insulating gate lever 20 is pivotally connected to the pivotal portion 12 of the insulating main body 10 through the pivot 40, and two insulating covers 42 are respectively covered on both sides of the pivot 40. end. In the embodiment of the present invention, the pivot 40 may be a rivet, but it is not limited thereto. In FIG. 9B, each insulating cover 42 includes a welding ring groove 422, and the opposite sides of the pivoting end 22 of the insulating gate lever 20 respectively include a welding protrusion ring 222, and the welding ring groove 422 of each insulating cover 42 corresponds to the welding ring groove 422 respectively. The protruding ring 222, and the ultrasonic welding method is used to make the two insulating covers 42 fixedly connected to the pivotal end 22 respectively. With the design of the present invention, the insulating hook can pass through the color of the second insulating segment and the first insulating segment. Different and simple safety verification methods are used to facilitate the user to easily identify whether the insulating hook has been correctly locked in a safe state, thereby ensuring the personal safety of the user. In addition, the entire outer surface of the insulating hook provided by the present invention is covered with insulating material, so as to prevent the hook from being inductive or conductive, thereby providing further safety protection for electric maintenance personnel.

The above descriptions are only preferred feasible embodiments of the present invention, and all equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the scope of the patent of the present invention.

Explanation of reference signs

[this invention]

1 insulating hook

10 insulating body

11 Main body core material 12 Pivot joint 13 Insulation layer

14 contact portion 142 outer surface

20 insulating gate rod

21 core material 211 groove 212 first core material section

214 Second Core Section 216 Third Core Section 21' Intermediate

212' first intermediate segment 214' second intermediate segment

216' third intermediate section 22 pivot end 222 welded collar

23 first insulating layer 24 free end 242 first insulating segment

244 second insulating segment 25 second insulating layer 26 external thread segment

30 insulating limit sleeve

31 ring core material 312 outer surface 32 internal thread

33 First Collar Insulator 35 Second Collar Insulator 352 Groove

40 Pivot 42 Insulation Cover 422 Fusion Ring Groove

50 first molds

50a upper mold 50b lower mold 52 first mold cavity

522 the first pouring space 524 the second pouring space 526 the third pouring space

54, 64 pouring holes

60 second mold

60a upper mold 60b lower mold 62 second mold cavity

622 The fourth pouring space

AX axis S01, S02, S03, S04 steps

Claims (21)

1. An insulating grab, comprising:

an insulating main body, having a pivot part and a butt part respectively located at two different ends of the insulating main body;

the insulating brake bar is provided with a brake bar core material, a first insulating layer and a second insulating layer, wherein the brake bar core material comprises a pivot joint end and a free end, the first insulating layer is arranged on the surface of the brake bar core material, and the first insulating layer forms an external thread section, wherein the external thread section is positioned between the pivot joint end and the free end; the insulated brake rod is pivoted to the pivoting part of the insulated main body through the pivoting end, so that the insulated brake rod can pivot and swing relative to the insulated main body; said free end being operatively abutted against or remote from said abutment of said insulating body; the free end comprises a first insulating section and a second insulating section, the second insulating section is positioned between the first insulating section and the external thread section, the first insulating section covers the brake bar core material corresponding to the first insulating section and a part of the brake bar core material corresponding to the second insulating section, the second insulating layer covers the first insulating layer and the brake bar core material corresponding to the second insulating section, and the color of the second insulating section is different from that of the first insulating section; and

the insulating limit sleeve is provided with an internal thread section, the insulating limit sleeve is sleeved on the insulating brake rod, the internal thread section and the external thread section of the insulating brake rod are screwed with each other, and the insulating limit sleeve can be operated to rotate so as to enable the insulating limit sleeve to move along the axial direction of the insulating brake rod;

when the free end is abutted against the abutting part of the insulating main body, and the insulating limiting sleeve completely covers the second insulating section of the insulating brake rod and covers at least one part of the abutting part of the insulating main body, the insulating limiting sleeve is defined to be located at a safe position, and the insulating brake rod cannot freely pivot; when the free end is abutted against the abutting part of the insulating main body and the insulating limiting sleeve exposes at least one part of the second insulating section of the insulating brake rod, the insulating limiting sleeve is defined to be located at a warning position.

2. The insulating hook according to claim 1, wherein when the free end abuts against the abutting portion of the insulating main body and the insulating position-limiting sleeve is located at the warning position, the insulating position-limiting sleeve exposes at least a portion of the second insulating section of the insulating brake rod, and the free end cannot firmly abut against the abutting portion.

3. The insulating hook according to claim 1, wherein when the free end abuts against the abutting portion of the insulating main body and the insulating position-limiting sleeve is located at the warning position, the insulating position-limiting sleeve exposes at least a portion of the second insulating section of the insulating brake rod, and the insulating brake rod can freely pivot with respect to the insulating main body.

4. The insulating hook of claim 1, wherein the insulating body comprises a body core and a body insulating layer covering the body core; the main body insulating layer does not completely cover the main body core material of the insulating main body at the abutting part, so that a part of the main body core material at the abutting part is exposed outwards.

5. The insulating grab of claim 1 in which the insulating stop sleeve includes a collar core material and a collar insulating layer that encases the collar core material; the lantern ring insulating layer is provided with a plurality of grooves which are annularly and concavely arranged on the surface of the lantern ring insulating layer.

6. The insulating hook of claim 1, wherein the insulating brake lever includes a brake lever insulating layer that covers the brake lever core; the brake lever insulating layer comprises the first insulating section, the second insulating section, the external thread section and a pivoting section from the free end to the pivoting end in sequence, wherein the pivoting section of the brake lever insulating layer covers the brake lever core material corresponding to the pivoting end of the insulating main body, and the color of the second insulating section is different from the colors of the external thread section and the pivoting section.

7. The insulating hook of claim 6, wherein the first insulating section has the same color as the external thread section and the pivot section.

8. The insulating grab of claim 6, in which the first insulating layer comprises the first insulating segment and the second insulating segment.

9. The insulating hook of claim 7, wherein the material and color of the first insulating layer are the same as those of the first insulating section and the outer threaded section.

10. The insulating hook of claim 1, wherein the pivoting end of the insulating brake lever is pivoted to the pivoting portion of the insulating main body by a pivot, and two insulating covers respectively cover two ends of the pivot.

11. The insulating hook according to claim 10, wherein each of the insulating covers includes a welding ring groove, and opposite sides of the pivotal end of the insulating lever respectively include a welding protrusion ring, the welding ring groove of each of the insulating covers respectively corresponds to the welding protrusion ring, and the two insulating covers are respectively fixed to the two welding protrusion rings of the pivotal end by ultrasonic welding.

12. An insulating brake bar for a hook comprises a brake bar core material, a first insulating layer and a second insulating layer, wherein the brake bar core material comprises a free end and a pivot end, the first insulating layer is arranged on the surface of the brake bar core material, and an external thread section is formed between the free end and the pivot end by the first insulating layer; the first insulating layer comprises a first insulating section and a second insulating section at the free end, the second insulating section is positioned between the first insulating section and the external thread section, the first insulating layer covers the brake bar core material corresponding to the first insulating section and a part of the brake bar core material corresponding to the second insulating section, the second insulating layer covers the first insulating layer and the brake bar core material corresponding to the second insulating section, and the color of the second insulating section is different from that of the first insulating section.

13. The insulating brake lever for a hook according to claim 12, wherein the free end has an outer surface, the first insulating layer covers all of the outer surface corresponding to the free end of the first insulating section and a portion of the outer surface corresponding to the free end of the second insulating section, and the second insulating layer covers all of the outer surfaces corresponding to the first insulating layer and the free end of the second insulating section.

14. An insulating brake lever for a hook as claimed in claim 12, wherein the second insulating section is of a different colour to the external threaded section.

15. The insulating brake lever for a hook of claim 12, wherein the color of the first insulating section is the same as the color of the external thread section.

16. The insulating brake lever for a hook according to claim 12, wherein the free end has a groove, and the groove has an inner surface, at least a portion of the inner surface being uncovered by at least one of the first insulating layer and the second insulating layer.

17. A method of manufacturing an insulating brake lever for hooks according to claim 12, comprising:

providing a brake bar core material and a first mold, wherein the brake bar core material is arranged in a first mold cavity of the first mold, the brake bar core material is provided with a first core material section, a second core material section and a third core material section, and the first mold cavity is provided with a first area, a second area and a third area; wherein the first core section is disposed within the first region, the second core section is disposed within the second region, and the third core section is disposed within the third region, the third core section having a third core outer surface; a first pouring space is arranged between the first core material section and the inner wall of the first area, a second pouring space is arranged between the second core material section and the inner wall of the second area, and a third pouring space is arranged between the third core material section and the inner wall of the third area, wherein the second pouring space is communicated with the first pouring space and the third pouring space;

pouring a first insulating material into the first mold cavity, wherein the first insulating material fills the first pouring space, the second pouring space and the third pouring space to form a first insulating layer on the surface of the brake bar core material so as to obtain an intermediate body, and the first insulating layer forms an external thread section on the outer surface of the third core material section;

the intermediate body is provided with a first intermediate body section, a second intermediate body section and a third intermediate body section, a second mold is provided, when the intermediate body is arranged in a second mold cavity of the second mold, the first intermediate body section and the third intermediate body section are in close contact with the inner wall of the second mold cavity, and a fourth pouring space is arranged between the second intermediate body section and the inner wall of the second mold cavity; and

pouring a second insulating material into the fourth pouring space, wherein the second insulating material fills the fourth pouring space, and a second insulating layer is formed on the surfaces of the first insulating layer and the brake bar core material corresponding to the second intermediate body section, so as to obtain the insulating brake bar.

18. The method for manufacturing an insulating brake lever for a hook according to claim 17, wherein the first mold has a pouring hole communicating with the third region of the first mold cavity.

19. The method of manufacturing an insulating brake lever for a hook according to claim 18, wherein the first insulating material is injected into the third region of the first mold cavity through the pouring hole and sequentially fills the third pouring space, the second pouring space, and the first pouring space.

20. The method of claim 17, wherein the first core section has a first core outer surface, the second core section has a second core outer surface, the first insulation layer covers the first core outer surface, the third core outer surface and a portion of the second core outer surface, and the second insulation layer covers the first insulation layer corresponding to the second core section and the entire second core outer surface.

21. The method according to claim 20, wherein the combination of the first core section and the second core section has a groove, and the groove has an inner surface, at least a portion of the inner surface being uncovered by at least one of the first insulating layer and the second insulating layer.

Images