Falling protector for high-altitude operation and falling prevention device

Abstract

The utility model relates to the field of anti-falling devices, in particular to an anti-falling device and an anti-falling device for aloft work, the anti-falling device comprises a shell and calipers, the shell is provided with a rail groove and a clamp seat, the clamp seat is arranged on the outer side of the shell, and the inner side, opposite to the clamp seat, of the rail groove is opened; a brake through hole communicated with the track groove is formed in the caliper seat, the caliper is hinged to the caliper seat, a caliper head can stretch into the track groove through the brake through hole, and at least the upper ends of notches, corresponding to the two ends of the track groove, of the outer side of the shell are provided with transverse guide wheels. The front end and the rear end of the two sides of the shell are provided with side wheel grooves with the two sides and the outer ends open. The transverse guide wheels are arranged at the upper end and the lower end of the rail groove of the shell, so that the contact between the outer rail surface of the guide rail penetrating through the rail groove and the corresponding surface of the rail groove is complete upper and lower end rolling contact, the jamming probability is greatly reduced, the working efficiency is improved, and the use is more convenient and safer.

Description

Technical Field

[0001] The present invention relates to the field of fall arresters, in particular to a fall arrester and a fall arrest device for aerial work. Background Art

[0002] Currently, many power transmission and transformation line towers and communication towers are equipped with fall arresters. When workers climb ladders or equipment structures to perform work, they install a fall arrester on a guide rail and connect it to a safety rope. If a dangerous fall occurs, the worker's own weight can quickly lock the fall arrester to the guide rail, preventing the worker from falling. However, existing fall arresters have many inconveniences: the excessive space in the guide rail groove of the fall arrester can easily cause the surface contact between the inner surface of the groove and the rail to become stuck, while the excessive space can easily cause the groove to deflect and become stuck, or even cause the fall arrester to fail. In addition, the existing fall arrester clamps or calipers are completely freely rotatable. However, in actual use, the calipers may occasionally directly lock the guide rail due to the random up and down movement of the connected safety rope, which may cause the worker to be stuck when climbing normally. Therefore, when climbing, workers often have to manually slide the fall arrester up and then physically climb, which is cumbersome and increases the risk of work. In addition, the existing clamping plate or caliper is directly sleeved with the hinge shaft, which causes severe wear during long-term use, greatly reducing the service life of the fall arrester. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and to propose a fall arrester and a fall arrest device for high-altitude operations.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A fall arrester for aerial work comprises a shell and a caliper, wherein the shell is provided with a track groove and a caliper seat, the caliper seat is arranged on the outer side of the shell, the track groove is open on the inner side facing away from the caliper seat, the caliper seat is provided with a brake through-hole communicating with the track groove, the caliper is hinged to the caliper seat and the caliper head can extend into the track groove through the brake through-hole, a transverse guide wheel is provided on at least the upper end of the two end notches of the outer side of the shell corresponding to the track groove, side wheel grooves with open sides and outer ends are provided on the front and rear ends of both sides of the shell, side guide wheels are provided on the side wheel grooves, and at least the inner wheel surface of the transverse guide wheel and the side guide wheels facing the track groove extends into the groove cavity of the track groove.

[0006] Preferably, a copper sleeve is provided on at least a portion of the outer sleeve of the pin connecting the caliper seat and the caliper and sleeved on the caliper, and the caliper is sleeved on the copper sleeve.

[0007] Preferably, an E-shaped retaining spring for limiting position and a cotter pin located outside the E-shaped retaining spring are inserted into the pin shaft that passes through the caliper seat and the caliper and passes through the end of the pin shaft that passes through the caliper seat.

[0008] Preferably, transverse guide wheels are provided at both upper and lower ends of the shell, and the transverse guide wheel at each end is a long wheel or two symmetrical and spaced short wheels or a plurality of spaced short wheels.

[0009] Preferably, the transverse guide wheel located at the lower end of the shell includes two short wheels symmetrically arranged at both side ends, and at least the upper end of the shell is integrally connected with an end cover that is half-enclosed outside the transverse guide wheel. The inner side of the end cover is a wheel groove for sinking part of the transverse guide wheel. When viewed from the side of the shell, the transverse guide wheel extends outward beyond the side guide wheel at the corresponding end.

[0010] Preferably, the caliper comprises a caliper arm and a caliper head, and the angle between the center lines of the caliper arm and the caliper head is 130-140 degrees.

[0011] Preferably, the track groove includes a groove surface wall, a groove side wall and a groove opening wall, the groove opening wall is an inclined wall, and the angle between the groove opening wall and the groove side wall is 95-100 degrees.

[0012] Preferably, a reset groove is provided on the wall of the brake through hole, and the reset groove is used for installing a torsion spring that can reset the caliper.

[0013] Preferably, a circle of bosses is provided on the outer periphery of both sides of the caliper head corresponding to the hinge hole.

[0014] Preferably, recessed shaft-accommodating grooves are provided on the shells located on both sides of the caliper seat, corresponding to the shaft ends of the pins that pass through the caliper and the caliper seat, and arrows for indicating directions are provided on the bottom surfaces of the shaft-accommodating grooves.

[0015] A fall prevention device for aerial work includes the above-mentioned fall arrester for aerial work, and the fall prevention device also includes a guide rail, wherein a short edge plate is integrally connected to the side of the web of the guide rail opposite to the flange plate, and the width of the short edge plate is smaller than the width of the flange plate.

[0016] Beneficial effects:

[0017] 1. The present application provides transverse guide wheels at both upper and lower ends of the track groove of the shell, so that the contact between the outer rail surface of the guide rail passing through the track groove and the corresponding surface of the track groove is complete rolling contact at both ends, thereby greatly reducing the probability of jamming, improving work efficiency, and making it more convenient and safe to use. In addition, side guide wheels are provided on both sides and front and back of the shell, so that the contact between the track groove and the side of the guide rail is also all rolling contact, which is more stable and smooth. The side wheel groove of the present application is open on both sides and the outer end. Such a design is convenient for the installation of the side guide wheels on the one hand, and at the same time, when there are foreign objects, it is not easy to be drawn into the side guide wheels, and even if it is drawn into, it is easy to clean.

[0018] 2. In this application, a copper sleeve is provided between the caliper and the pin, thereby reducing the friction between the caliper and the pin. At the same time, the pin is not easily bent or deformed, thereby increasing the service life of the pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the present application with long wheels at both ends;

[0020] Figure 2 This is a schematic diagram of another structural solution of the present application with long wheels at both ends;

[0021] Figure 3 This is a schematic diagram of the structure of the present application having two short wheels at one end and a long wheel at the other end;

[0022] Figure 4 The schematic diagram of the cross-section structure of this application Figure 1 ;

[0023] Figure 5 The schematic diagram of the cross-section structure of this application Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the partial cross-section structure of this application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below. The present invention will be further described below with reference to the accompanying drawings.

[0026] Example 1:

[0027] A fall arrester for aerial work comprises a housing 1 and a caliper 2. The housing is provided with a track groove 7 and a clamp seat 3. The clamp seat is disposed on the outside of the housing, and the outer side surface of the clamp seat is either arc-shaped or flat-cut. Two types of fall arresters with clamp seats are shown in the accompanying drawings. The track groove is open toward the inside of the clamp seat. The clamp seat is provided with a brake through-hole 31 communicating with the track groove. The caliper is hinged to the clamp seat, and the clamp head can extend into the track groove through the brake through-hole. A transverse guide wheel 4 is provided on the outer side of the housing, corresponding to the two end notches of the track groove, at least at the upper end. This transverse guide wheel can be provided at the upper end, or at both the upper and lower ends. More preferably, it can be provided at both ends. Side wheel grooves 51 are provided on the front and rear ends of both sides of the housing, with open sides and outer ends. Side guide wheels 5 are provided on the side wheel grooves. The transverse guide wheels and at least the inner wheel surface of the side guide wheels facing the track groove extend into the groove cavity of the track groove.

[0028] The present application provides transverse guide wheels at both upper and lower ends of the track groove of the shell, so that the contact between the outer rail surface of the guide rail passing through the track groove and the corresponding surface of the track groove is complete rolling contact at both ends, thereby greatly reducing the probability of jamming, improving work efficiency, and making it more convenient and safe to use. In addition, side guide wheels are provided on both sides and front and back of the shell, so that the contact between the track groove and the side of the guide rail is also all rolling contact, which is more stable and smooth. The side wheel groove of the present application is open on both sides and the outer end. Such a design is convenient for the installation of the side guide wheels on the one hand, and at the same time, when there are foreign objects, it is not easy to be drawn into the side guide wheels, and even if it is drawn in, it is easy to clean.

[0029] The pin 6 connecting the caliper seat and the caliper is provided with a copper sleeve 61, at least on the portion of the outer sleeve that receives the caliper. The caliper is sleeved on the copper sleeve. In this application, a copper sleeve is further sleeved between the caliper and the pin, thereby reducing friction between the caliper and the pin, while also preventing the pin from bending and deforming, thereby increasing the pin's service life. Furthermore, the copper sleeve can be configured to correspond to the width of the caliper and fit over the caliper's axial hole for the pin, matching the caliper. This reduces dry contact between the caliper seat, the pin, and the copper sleeve, ensuring optimal function.

[0030] Example 2:

[0031] The difference from the above embodiment is that the pin 6 that connects the caliper seat and the caliper is connected to the end of the pin that passes through the caliper seat and is inserted with an E-shaped retaining ring 62 for limiting the position and a cotter pin 63 located outside the E-shaped retaining ring. This design uses an E-shaped retaining ring and a cotter pin to achieve axial fixation, which can more effectively prevent the pin from falling off and is safer when used.

[0032] Example 3:

[0033] The difference from the above embodiment is that transverse guide wheels are provided at both ends of the shell, and the transverse guide wheel at each end is a long wheel 41 or two symmetrical and spaced short wheels 42 or multiple spaced short wheels.

[0034] More preferably, the transverse guide wheel at the lower end of the shell includes two short wheels symmetrically arranged on both sides. The outer surface of the guide rail is generally flat, but it may become concave or convex or sticky during processing, transportation, installation or outdoor exposure, resulting in defects and unevenness on the guide rail surface. If a whole transverse guide wheel is in contact with the outer surface of the guide rail during use, any slight unevenness on the guide rail surface may cause the entire transverse guide wheel to deflect, jump or get squeezed, making the entire fall arrester not smooth to use, and may even bring danger. In order to ensure safety and smoothness, the processing and maintenance requirements for the guide rail are also relatively high. The present application uses short wheels at both ends to make rolling contact with the outer surface of the guide rail, and can even have more than two short wheels coaxially spaced apart. Since the contact between the short wheels and the guide rail surface is multi-point and does not interfere with each other, the impact of the defects of the guide rail on the fall arrester can be greatly avoided, making it safer and more convenient to use. Moreover, since there are multiple rolling points, once one wheel is immobilized, the other short wheels can still operate normally, which can ensure that personnel can use it relatively easily in the above-mentioned emergencies during high-altitude operations, reducing the difficulty of use in the event of a fault and making it convenient for operators to operate and adjust. Multiple short wheels can be set at the upper and lower ends of the shell. What is more preferable is that the present application uses a long horizontal guide wheel at the upper end of the fall arrester and two symmetrically spaced short wheels at the lower end, thereby forming a relatively stable triangular support, which is more stable when used and convenient for the fall arrester to return to the center.

[0035] Example 4:

[0036] The difference from the above embodiment is that at least the upper end of the shell is integrally connected with an end cover 11 that is half-enclosed outside the transverse guide wheel, and the inner side of the end cover is a wheel groove 111 for sinking part of the transverse guide wheel. The end cover can be formed by extending outward from one end of the shell and then making a recessed wheel groove at the bottom. The setting of the end cover can prevent the upper end guide wheel from being stuck by foreign objects and affecting the safety of workers. When viewed from the side of the shell, the transverse guide wheel extends outward beyond the side guide wheel at the corresponding end. The contact surface between the transverse guide wheel and the guide rail surface is larger than the contact surface between the side guide wheel and the guide rail. Therefore, the design of the transverse guide wheel extending beyond the corresponding end side guide wheel not only facilitates the connection between the fall arrester and the guide rail, but also ensures stability and more balanced force during connection and operation.

[0037] Embodiment 5:

[0038] The difference from the above embodiment is that the caliper includes a caliper arm 21 and a caliper head 22, and the angle α between the center lines of the caliper arm and the caliper head is 130-140 degrees. More preferably, according to the principle of moment balance, in order to increase the friction between the caliper and the guide rail, the angle α on the caliper is designed to be 136°.

[0039] The surface of the flange plate of the guide rail currently used by the applicant, facing the web, is inclined, thereby ensuring the strength of the guide rail. The track groove includes a groove surface wall 71, groove side walls 72, and a groove opening wall 73. To ensure better fit between the track groove and the guide rail flange and improve smoothness of guidance, the groove opening wall is an inclined wall, and the angle between the groove opening wall and the groove side wall is 95-100 degrees. The more preferred angle between the groove opening wall and the groove side wall is 99.46°. The surface of the guide rail flange plate facing the web is parallel to the groove opening wall surface.

[0040] Example 6:

[0041] The difference from the previous embodiment is that the wall of the brake through hole 31 is provided with a reset groove 32 for mounting a torsion spring 33 that resets the caliper. The torsion spring design ensures that the caliper remains in a position where it is not locked against the guide rail when no force is applied, making it easier for operators to climb up and down. Only in the event of an accident can the caliper be pulled by a protective rope connected to the rope hole on the outer end of the caliper to overcome the force of the torsion spring and lock the caliper to the guide rail.

[0042] Embodiment seven:

[0043] The difference from the above embodiment is that the caliper head is provided with a circle of bosses 221 on both sides of the outer periphery of the hinge hole. The boss design can reduce the contact surface between the caliper and the caliper seat, thereby reducing friction and ensuring smooth rotation.

[0044] Embodiment 8:

[0045] The difference from the above embodiment is that the shaft ends of the pins that pass through the caliper and the caliper are provided with recessed shaft grooves 12 on the shells on both sides of the caliper seat, so that the structure of the fall arrester is compact and there will not be too much expenditure structure to hook the workers' clothes or equipment. The bottom surface of the shaft groove is provided with an arrow 13 for indicating the direction, which is used by the workers to identify the direction when they fit the fall arrester with the guide rail.

[0046] A fall arrester for aerial work, comprising the above-mentioned fall arrester for aerial work. The fall arrester also includes a guide rail 8, which can be adaptively inserted into the track groove of the fall arrester, so that the fall arrester can move up and down along the guide rail. The angle between the surface of the flange plate 81 of the guide rail facing the side of the web 82 and the web is 90-100 degrees, corresponding to the angle between the above-mentioned notch wall and the groove side wall, for example, 99.46° is selected as above. More preferably, in order to facilitate the installation of the guide rail and ensure the strength of the guide rail, a short edge plate 83 can be integrally connected to the flange plate of the web of the guide rail, and the width of the short edge plate is smaller than that of the flange plate.

Claims

1. A fall arrester for high-altitude work, comprising a housing (1) and a caliper (2), characterized in that: The shell is provided with a track groove (7) and a clamp seat (3), the clamp seat is provided on the outer side of the shell, the track groove is open on the inner side facing away from the clamp seat, the clamp seat is provided with a brake through hole (31) communicating with the track groove, the caliper is hinged on the clamp seat and the clamp head can extend into the track groove through the brake through hole, a transverse guide wheel (4) is provided on at least the upper end of the two end slots of the outer side of the shell corresponding to the track groove, side wheel grooves (51) with open sides and outer ends are provided on the front and rear ends of both sides of the shell, side guide wheels (5) are provided on the side wheel grooves, and the transverse guide wheel and the side guide wheel at least extend into the groove cavity of the track groove facing the inner wheel surface of the track groove.

2. A fall arrester for aerial work according to claim 1, characterized in that: A copper sleeve (61) is provided on a pin shaft (6) that passes through the caliper seat and the caliper and at least on a portion of the outer sleeve that is sleeved on the caliper, and the caliper is sleeved on the copper sleeve.

3. A fall arrester for aerial work according to claim 1, characterized in that: The pin shaft (6) that passes through the clamp seat and the caliper is connected to the end of the clamp seat through which an E-shaped retaining ring (62) for limiting position and a split pin (63) located outside the E-shaped retaining ring are inserted.

4. A fall arrester for aerial work according to claim 1, characterized in that: Both upper and lower ends of the housing are provided with transverse guide wheels, and the transverse guide wheel at each end is a long wheel (41) or two symmetrical and spaced short wheels (42) or a plurality of spaced short wheels.

5. A fall arrester for aerial work according to claim 4, characterized in that: The transverse guide wheel at the lower end of the shell includes two short wheels symmetrically arranged at both ends. At least the upper end of the shell is integrally connected with an end cover (11) half-enclosed outside the transverse guide wheel. The inner side of the end cover is a wheel groove (111) for sinking part of the transverse guide wheel. When viewed from the side of the shell, the transverse guide wheel extends outward beyond the side guide wheel at the corresponding end.

6. A fall arrester for aerial work according to claim 1, characterized in that: The caliper comprises a caliper arm (21) and a caliper head (22), and the angle between the center lines of the caliper arm and the caliper head is 130-140 degrees.

7. The fall arrester for aerial work according to claim 1, characterized in that: The track groove comprises a groove surface wall (71), a groove side wall (72) and a groove opening wall (73); the groove opening wall is an inclined wall; and the angle between the groove opening wall and the groove side wall is 95-100 degrees.

8. The fall arrester for aerial work according to claim 1, characterized in that: A reset groove (32) is provided on the wall of the brake through hole (31), and the reset groove is used for installing a torsion spring (33) that can reset the caliper.

9. The fall arrester for aerial work according to claim 1, characterized in that: A circle of bosses (221) is provided on the outer periphery of both sides of the caliper head corresponding to the hinge hole.

10. The fall arrester for aerial work according to claim 1, characterized in that: The housings located on both sides of the caliper seat are provided with recessed shaft-containing grooves (12) at the shaft ends corresponding to the pin shafts that penetrate the caliper and the caliper seat, and arrows (13) for marking directions are provided on the bottom surfaces of the shaft-containing grooves.

11. A fall prevention device for high-altitude operations, characterized by: The invention comprises a fall arrester for aerial work according to any one of claims 1 to 10, wherein the fall arrester further comprises a guide rail (8), a short edge plate (83) being integrally connected to one side of the web of the guide rail opposite to the flange plate, and the width of the short edge plate is smaller than the width of the flange plate.

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