Safety protection device of overhead and portal crane

Abstract

The utility model relates to the technical field of protection of portal cranes, and discloses a safety protection device of a portal crane, which comprises brackets symmetrically arranged at the top of a bridge frame; the sliding rods are symmetrically arranged between the brackets; the ring body is connected to the sliding rod in a sliding manner; one end of the connecting rod is arranged on one side of the ring body; the back plate is arranged at the other end of the connecting rod; the fixing belts are symmetrically arranged on the side wall, away from the connecting rod, of the back plate; and the fixing mechanism is arranged on the fixing belt. When an electric hoist needs to be overhauled, a worker climbs to the top of the bridge frame, the waist is sleeved with a fixing belt, a limiting rod on a fixing block is inserted into a cavity in a fixing frame, the fixing belt is fixed through a fixing mechanism, and at the moment, a back plate and the fixing belt are combined to limit the worker to the top of the bridge frame; the connecting rod on the rear side of the back plate drives the ring body to slide on the sliding rod, and workers are prevented from falling off from the high altitude.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry crane protection, in particular to a gantry crane safety protection device. Background Art

[0002] A gantry crane is a type of lifting equipment used horizontally above workshops, warehouses, and material yards to lift materials. Its ends rest on tall concrete columns or metal supports, giving it a bridge-like shape. The gantry crane's bridge runs longitudinally along tracks laid on elevated platforms on either side, fully utilizing the space beneath it to lift materials without being obstructed by ground-level equipment. It is the most widely used and numerous type of lifting machinery.

[0003] The bridge of a gantry crane is very high, and there are no safety protection measures on the inside of the trolley track. When workers are inspecting and maintaining the crane, they are directly exposed to the risk of falling from heights, and the risk level is high. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the deficiencies of the existing technology, the utility model provides a safety protection device for a gantry crane, which has the advantage of safety protection and solves the problem that there are no protective measures on the inner side of the existing trolley running track, and the workers are at high risk of falling from heights during installation and maintenance.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A safety protection device for a gantry crane, comprising a main body assembly, wherein the main body assembly comprises:

[0008] A bridge with an electric hoist on top;

[0009] The bridge is provided with a protection component, which includes:

[0010] A bracket is symmetrically arranged on the top of the bridge;

[0011] A sliding rod is symmetrically arranged between the brackets;

[0012] a ring body, slidably connected to the sliding rod;

[0013] A connecting rod, one end of which is arranged on one side of the ring body;

[0014] a back plate, arranged at the other end of the connecting rod;

[0015] A fixing belt is symmetrically arranged on a side wall of the back plate away from the connecting rod;

[0016] The fixing mechanism is arranged on the fixing belt.

[0017] Preferably, the fixing mechanism includes:

[0018] A fixing block, fixedly connected to the fixing belt at one end;

[0019] A limiting rod is symmetrically arranged on one side of the fixing block close to the other fixing belt;

[0020] a fixing frame, arranged on the fixing belt at another location;

[0021] a cavity, formed in the fixing frame;

[0022] Spring 1, one end of which is symmetrically fixedly connected to the inner wall of the cavity;

[0023] A crossbar, fixedly connected to the other end of the spring;

[0024] A pressure rod, one end of which is fixedly connected to a side of the cross bar away from the spring 1, and the other end of which passes through the fixed frame;

[0025] A pressing plate is fixedly connected to one end of the pressing rod located outside the fixing frame.

[0026] Preferably, a sliding groove is provided on one side of the back plate close to the connecting rod, and a slider is rotatably connected to one end of the connecting rod close to the back plate, and the slider is slidably connected to the sliding groove.

[0027] Preferably, an optical axis is symmetrically provided on the inner side wall of the cavity, and the cross bar passes through the optical axis and is slidably connected to the optical axis.

[0028] Preferably, a cushion is provided on a side of the back plate away from the connecting rod.

[0029] Preferably, a second spring is symmetrically provided on the inner side wall of the cavity, the other end of the second spring is fixedly connected to a plate, and the plate and the second spring are located on the left side of the cross bar.

[0030] (3) Beneficial effects

[0031] Compared with the prior art, the present invention provides a safety protection device for a gantry crane, which has the following beneficial effects:

[0032] This protective device offers the advantage of safety. When inspecting the electric hoist, the worker climbs to the top of the bridge, places the fixing belt around their waist, inserts the limit rod on the fixing block into the cavity on the fixing frame, and the fixing mechanism secures the fixing belt. The back plate and fixing belt then work together to restrain the worker at the top of the bridge. As the worker moves across the bridge, the connecting rod on the rear of the back plate drives the ring body to slide on the slide bar, preventing the worker from falling from height. This solves the problem of existing trolley tracks lacking protective measures, which poses a high risk of falling during installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of the utility model;

[0034] Figure 2 This is an enlarged structural diagram of point A in the present utility model;

[0035] Figure 3 This is an enlarged structural diagram of point B in the present utility model;

[0036] Figure 4 This is a schematic diagram of a top-view cross-sectional structure of the cavity in the present invention;

[0037] Figure 5 This is a schematic diagram of the cross-sectional structure of the cavity when the fixing belt is connected in the present invention;

[0038] Figure 6 It is a schematic diagram of the left side cross-sectional structure of the chute in the present invention.

[0039] In the picture:

[0040] 1. Main assembly; 11. Bridge; 12. Electric hoist;

[0041] 2. Protective assembly; 21. Bracket; 22. Sliding rod; 23. Ring body; 24. Connecting rod; 241. Sliding block; 242. Sliding groove; 25. Back plate; 251. Cushion; 26. Fixing belt; 27. Fixing mechanism; 271. Fixing block; 272. Limiting rod; 273. Fixing frame; 274. Cavity; 275. Spring 1; 276. Crossbar; 277. Pressure rod; 278. Pressure plate;

[0042] 3. Optical axis; 4. Plate; 41. Spring 2. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0044] Example 1

[0045] See Figure 1-6 A safety protection device for a gantry crane includes a main body component 1, wherein the main body component 1 includes: a bridge frame 11, on the top of which an electric hoist 12 is arranged; a protection component 2 is arranged on the bridge frame 11, and the protection component 2 includes: a bracket 21, symmetrically arranged on the top of the bridge frame 11; a slide rod 22, symmetrically arranged between the brackets 21; a ring body 23, slidingly connected to the slide rod 22; a connecting rod 24, one end of which is arranged on one side of the ring body 23; a back plate 25, which is arranged at the other end of the connecting rod 24; a fixing belt 26, symmetrically arranged on a side wall of the back plate 25 away from the connecting rod 24; and a fixing mechanism 27, which is arranged on the fixing belt 26. The fixing mechanism 27 includes: a fixing block 271, fixedly connected to the fixing belt 26 at one end; a limiting rod 272, symmetrically arranged on one side of the fixing block 271 close to the other side of the fixing belt 26; a fixing frame 273, arranged on the other side of the fixing belt 26; a cavity 274, opened in the fixing frame 273; a spring 275, one end of which is symmetrically fixedly connected to the inner wall of the cavity 274; a cross bar 276, fixedly connected to the other end of the spring 275; a pressure rod 277, one end of which is fixedly connected to the side of the cross bar 276 away from the spring 275, and the other end passes through the fixing frame 273; a pressure plate 278, fixedly connected to one end of the pressure rod 277 located outside the fixing frame 273. A sliding groove 242 is formed on one side of the back plate 25 close to the connecting rod 24 . A slider 241 is rotatably connected to one end of the connecting rod 24 close to the back plate 25 . The slider 241 is slidably connected to the sliding groove 242 .

[0046] When the electric hoist 12 needs to be repaired, the staff climbs onto the top of the bridge 11 and puts the fixing belt 26 on the waist, inserts the limit rod 272 on the fixing block 271 into the cavity 274 on the fixing frame 273, and the fixing mechanism 27 fixes the fixing belt 26: when the fixing frame 273 extends into the cavity 274, the inclined surface on the fixing frame 273 contacts the cross bar 276 and pushes the cross bar 276 toward the direction of the spring 1 275. The spring 1 275 is compressed. When the fixing block 271 and the outer surface of the fixing frame 273 are connected, the fixing belt 26 is fixed. After the surfaces are fitted, the groove on the limit rod 272 and the cross bar 276 are on the same horizontal line. The spring 1 275 pushes the cross bar 276 into the groove of the limit rod 272, and the cross bar 276 limits the limit rod 272, thereby fixing the two fixing straps 26. At this time, the back plate 25 and the fixing straps 26 jointly restrict the staff on the top of the bridge 11. When the staff moves on the top of the bridge 11, the connecting rod 24 on the rear side of the back plate 25 drives the ring body 23 to slide on the slide bar 22, preventing the staff from falling from a height. The slider 241 on the rear side can slide in the slide groove 242, making it easier for the staff to squat and turn their bodies, increasing the staff's flexibility and facilitating the maintenance of the electric hoist 12. After the inspection is completed, the staff presses the pressure plate 278 toward the fixed frame 273. The pressure plate 278 drives the cross bar 276 to move through the pressure rod 277 and compresses the spring 1 275. At this time, the cross bar 276 is disengaged from the groove of the limit rod 272, and then the fixing block 271 is pulled to pull the limit rod 272 out of the cavity 274, thereby releasing the restriction of the fixing belt 26, which is convenient and quick.

[0047] Example 2

[0048] On the basis of the first embodiment, an auxiliary function is added.

[0049] See Figure 1-6 The optical axis 3 is symmetrically arranged on the inner wall of the cavity 274. The crossbar 276 passes through the optical axis 3 and is slidably connected to the optical axis 3. A pad 251 is provided on the side of the back plate 25 away from the connecting rod 24. A second spring 41 is symmetrically arranged on the inner wall of the cavity 274. The other end of the second spring 41 is fixedly connected to the plate 4. The plate 4 and the second spring 41 are located on the left side of the crossbar 276.

[0050] When crossbar 276 moves within cavity 274, optical axis 3 guides its movement, increasing its stability and preventing spring 1 275 from tilting during expansion and contraction, which could affect the speed and accuracy with which crossbar 276 enters or exits the groove of retaining rod 272. Pad 251 contacts the operator's back, increasing comfort after backplate 25 and securing strap 26 are secured, and facilitating maintenance. When retaining rod 272 extends into cavity 274 for securing, it pushes crossbar 276 while squeezing plate 278 toward spring 2 41, compressing spring 2 41. When the operator presses pressure plate 278 to release the restraint on crossbar 276, spring 2 41 rebounds, and plate 4 pushes limiter 272 out of cavity 274, eliminating the need for the operator to remove securing block 271 again, thus increasing operational convenience.

[0051] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety protection device for a gantry crane, comprising a main body component (1), wherein the main body component (1) comprises: A bridge (11) with an electric hoist (12) provided on the top; The invention is characterized in that a protective component (2) is provided on the bridge frame (11), and the protective component (2) comprises: A bracket (21) is symmetrically arranged on the top of the bridge (11); A slide bar (22) is symmetrically arranged between the brackets (21); A ring body (23) is slidably connected to the slide rod (22); A connecting rod (24), one end of which is arranged on one side of the ring body (23); A back plate (25) is provided at the other end of the connecting rod (24); A fixing belt (26) is symmetrically arranged on a side wall of the back plate (25) away from the connecting rod (24); The fixing mechanism (27) is arranged on the fixing belt (26).

2. A gantry crane safety protection device according to claim 1, characterized in that: The fixing mechanism (27) comprises: A fixing block (271) fixedly connected to the fixing belt (26) at one end; A limiting rod (272) is symmetrically arranged on one side of the fixing block (271) close to the other fixing belt (26); A fixing frame (273) is provided on another fixing belt (26); A cavity (274) is provided in the fixing frame (273); Spring 1 (275), one end of which is symmetrically fixedly connected to the inner wall of the cavity (274); A crossbar (276) is fixedly connected to the other end of the spring (275); A pressure rod (277), one end of which is fixedly connected to a side of the cross bar (276) away from the spring 1 (275), and the other end of which passes through the fixed frame (273); A pressure plate (278) is fixedly connected to one end of the pressure rod (277) located outside the fixed frame (273).

3. A gantry crane safety protection device according to claim 2, characterized in that: A sliding groove (242) is provided on one side of the back plate (25) close to the connecting rod (24); one end of the connecting rod (24) close to the back plate (25) is rotatably connected to a slider (241); and the slider (241) is slidably connected to the sliding groove (242).

4. A safety protection device for a gantry crane according to claim 3, characterized in that: An optical axis (3) is symmetrically arranged on the inner side wall of the cavity (274), and the crossbar (276) passes through the optical axis (3) and is slidably connected to the optical axis (3).

5. A safety protection device for a gantry crane according to claim 4, characterized in that: A cushion (251) is provided on a side of the back plate (25) away from the connecting rod (24).

6. A safety protection device for a gantry crane according to claim 5, characterized in that: A second spring (41) is symmetrically arranged on the inner wall of the cavity (274), and the other end of the second spring (41) is fixedly connected to a plate body (4), and the plate body (4) and the second spring (41) are located on the left side of the cross bar (276).

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