Bulk cargo loader safety barrier

Abstract

The utility model discloses a bulk cargo loader safety guardrail, including guide baffle, top cross bar and a plurality of vertical rods, a plurality of vertical rods are along the conveyer belt length direction interval setting and with conveyer belt support hinged, top cross bar is hinged with vertical rod upper end, the guide baffle is located in top cross bar below and is located conveyer belt one side and vertical rod hinged, the utility model has convenient operation, security height advantage.

Description

Technical Field

[0001] This utility model relates to the field of bulk cargo loading technology, specifically a safety guardrail for a bulk cargo loader. Background Technology

[0002] Bulk cargo loaders are aircraft ground service equipment that loads and unloads baggage, parcels, and other cargo onto and off aircraft via conveyor belts. To prevent cargo from deviating from its designated path on the conveyor belt, guide baffles are usually installed on both sides of the conveyor belt. These guide baffles are often flip-up or detachable. During operation, the guide baffles are erected to guide the cargo, and after operation, they are flipped down or removed. At the same time, to prevent operators from falling during operation, safety railings are usually also provided on both sides of the conveyor belt. A safety railing structure, such as CN2019211746377, describes a conveyor belt railing for airport baggage handling vehicles, which includes crossbars and at least two uprights, allowing the railing to be erected or folded.

[0003] The existing bulk cargo loaders have the following shortcomings: First, the guide baffles and safety railings are separate structures. When loading and unloading cargo, the guide baffles and safety railings must be erected separately, and then folded separately after the work is completed, which is cumbersome and affects the overall work efficiency. Second, in order to protect the aircraft skin, the safety railings are designed to maintain a certain distance from the cargo door to avoid the crossbars colliding with the fuselage when the railings are folded or erected. However, this creates a protective gap at the front end of the conveyor belt, posing a risk of falls for workers working at the front end of the conveyor belt. Third, the safety railings are single-layer crossbar structures. After the safety railings are erected, the gap between the crossbars and the transmission belt frame is relatively large, posing a risk of falls for workers leaning against the railings or working in a squatting position. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a safety guardrail for bulk cargo loaders that is easy to operate and highly safe.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A safety guardrail for a bulk cargo loader, characterized in that it includes a guide baffle, a top horizontal bar, and several vertical bars. The vertical bars are spaced apart along the length of the conveyor belt and hinged to the conveyor belt support. The top horizontal bar is hinged to the upper end of the vertical bars. The guide baffle is located below the top horizontal bar on one side of the conveyor belt and hinged to the vertical bars. The guide baffle and guardrail are integrated into one structure, which facilitates overall installation onto the conveyor belt support, simultaneous operation, simplifies work steps, and allows for simultaneous disassembly during replacement. This makes loading, unloading, and operation convenient and improves work efficiency.

[0006] The safety railing of this utility model also includes several bases, the lower end of the vertical rod is hinged to the base, and the base is fixedly connected to the conveyor belt support; the base facilitates the installation of the safety railing as a whole with the conveyor belt support.

[0007] The safety railing of this utility model also includes a top telescopic crossbar and a crossbar locking mechanism, wherein the top telescopic crossbar is slidably engaged with the top crossbar and locked by the crossbar locking mechanism; The top telescopic crossbar is connected to a buffer head at its end. The top telescopic crossbar is designed so that when the safety guardrail is erected, the extension length can be selected according to the distance to the aircraft cargo hold, and it extends forward to block the gap between the front end of the conveyor belt and the aircraft skin, effectively preventing the risk of workers falling when working at the front end of the conveyor belt. The buffer head can effectively prevent the aircraft from being damaged by contact with the aircraft skin when it extends.

[0008] The top telescopic crossbar of this utility model is inserted into the interior of the top crossbar. The top crossbar has a top guide groove arranged along its length. A handle is fixed on the top telescopic crossbar and extends out of the top guide groove. The crossbar locking mechanism uses a locking bolt. The top telescopic crossbar has a threaded hole that mates with the locking bolt. The locking bolt passes through the top guide groove and is threadedly connected to the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the top crossbar. Alternatively, the top telescopic crossbar is sleeved on the outside of the top crossbar, and the top telescopic crossbar is provided with a top guide groove arranged along its length direction. A handle is fixed on the top telescopic crossbar. The crossbar locking mechanism adopts a locking bolt. The top crossbar is provided with a threaded hole that mates with the locking bolt. The locking bolt passes through the top guide groove and is threadedly connected to the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the top telescopic crossbar. The handle is designed to facilitate sliding the top telescopic crossbar, and the locking bolt is used to lock and limit the top telescopic crossbar.

[0009] The safety railing of this utility model also includes a middle horizontal bar, which is located between the top horizontal bar and the guide baffle. The middle horizontal bar is hinged to the middle of the vertical bar. By setting the middle horizontal bar, the gap between the top horizontal bar and the conveyor belt is reduced, effectively avoiding the risk of falling when workers lean against the railing or work in a squatting position.

[0010] The safety railing of this utility model also includes a central telescopic crossbar and a crossbar locking mechanism. The central telescopic crossbar is slidably engaged with the central crossbar and locked by the crossbar locking mechanism. The end of the central telescopic crossbar is connected to a buffer head; the central telescopic crossbar is designed so that when the safety guardrail is erected, the extension length can be selected according to the distance to the aircraft cargo hold, and it extends forward to block the gap between the front end of the conveyor belt and the aircraft skin, effectively preventing the risk of falling when the workers are working at the front end of the conveyor belt. The buffer head can effectively prevent the aircraft from being damaged by touching the aircraft skin when it extends.

[0011] The central telescopic crossbar of this utility model is inserted into the interior of the central crossbar. The central crossbar has a central guide groove arranged along its length. A handle is fixed on the central telescopic crossbar, and the handle extends out of the central guide groove. The crossbar locking mechanism uses a locking bolt. The central telescopic crossbar has a threaded hole that mates with the locking bolt. The locking bolt passes through the central guide groove and is threadedly connected to the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the central crossbar. Alternatively, the central telescopic crossbar is sleeved outside the central crossbar, and the central telescopic crossbar is provided with a central guide groove arranged along its length direction. A handle is fixed on the central telescopic crossbar. The crossbar locking mechanism adopts a locking bolt, and the central crossbar is provided with a threaded hole that mates with the locking bolt. The locking bolt passes through the central guide groove and is threadedly connected to the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the central telescopic crossbar. The handle is designed to facilitate the sliding of the central telescopic crossbar, while the locking bolt is designed to lock and limit the movement of the central telescopic crossbar.

[0012] This utility model also includes a guardrail locking mechanism, which locks the safety guardrail in both folded and upright states. The guardrail locking mechanism includes a connecting frame and a locking pin. The connecting frame is provided with a vertical limiting hole and a folding limiting hole, and the vertical rod is provided with a limiting hole. The connecting frame is fixedly connected to the top horizontal bar, the middle horizontal bar, or the guide baffle. The vertical bar is hinged to the connecting frame. When the safety guardrail is folded, the locking pin is inserted into the limiting hole of the vertical bar through the folding limiting insertion hole. When the safety guardrail is erected, the locking pin is inserted into the limiting hole of the vertical bar through the erection limiting insertion hole. The structure is simple to ensure that the safety railing locks in place when folded or erected.

[0013] This utility model also includes a booster spring, which is provided between the base and the vertical rod or the middle horizontal rod. The lower end of the booster spring is connected to the base, and the upper end is connected to the vertical rod or the middle horizontal rod. And / or, an assist spring is provided between the top crossbar and the vertical bar or the middle crossbar. The upper end of the assist spring is connected to the top crossbar, and the lower end is connected to the vertical bar or the middle crossbar. When the safety railing is folded, the assist spring is in an energy storage state. When the safety railing needs to be erected, the locking of the safety railing is released, and the restoring force of the assist spring can assist in the erection of the safety railing, making the operation more labor-saving.

[0014] The assist spring described in this utility model is a helical spring or a gas spring.

[0015] The beneficial effects of this utility model are as follows: The integrated structure of the guide baffle and guardrail facilitates overall installation onto the conveyor belt support, enabling synchronous operation, simplifying work steps, and allowing for simultaneous disassembly during replacement, making loading, unloading, and operation convenient and improving work efficiency; The telescopic crossbar allows the extension length to be selected according to the distance to the aircraft cargo hold when the safety guardrail is erected, extending forward to block the gap between the front end of the conveyor belt and the aircraft skin, effectively preventing the risk of workers falling when working at the front end of the conveyor belt; The buffer head effectively prevents damage to the aircraft from contact with the aircraft skin when extended; By setting a middle crossbar, the gap between the top crossbar and the conveyor belt is reduced, effectively avoiding the risk of workers falling when leaning against the guardrail or working in a squatting position. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the safety guardrail installed on the vehicle.

[0017] Figure 2 This is a schematic diagram of the safety guardrail standing upright on the conveyor belt.

[0018] Figure 3 This is a schematic diagram of the safety guardrail in its folded state on the conveyor belt.

[0019] Figure 4 This is a schematic diagram of a safety railing structure.

[0020] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0021] Figure 6 yes Figure 4 Enlarged view of section B in the middle.

[0022] Figure 7 This is a schematic diagram of the top crossbar and the top telescopic crossbar structure.

[0023] Figure label: Conveyor belt-1, conveyor belt front end-101, conveyor belt rear end-102, conveyor belt support-103; Safety railing-2, base-201, vertical bar-202, middle horizontal bar-203, middle horizontal groove-2031, top horizontal bar-204, top guide groove-2041, guide baffle-205, middle telescopic horizontal bar-206, top telescopic horizontal bar-207, buffer head-208, handle-209, locking bolt-210, bottom pin-211, middle pin-212, top pin-213, baffle pin-214, connecting bracket-215, vertical limit insertion hole-2151, folding limit insertion hole-2152, locking pin-216, bracket-217, buffer pad-218, coil spring-219, gas spring-220. Detailed Implementation

[0024] The present invention will now be described in conjunction with the accompanying drawings and embodiments.

[0025] As attached Figure 1 As shown, the bulk cargo loader is equipped with a conveyor belt 1, which is used to transfer cargo between the ground and the aircraft cargo hold. In this embodiment, safety guardrails 2 are provided on both the left and right sides of the conveyor belt 1 for protection. The front end 101 of the conveyor belt is the end closest to the aircraft cargo hold, and the rear end 102 of the conveyor belt is the end closest to the ground.

[0026] As attached Figure 2-7 As shown, a safety guardrail 2 for a bulk cargo loader includes a guide baffle 205, a top horizontal bar 204, and several vertical bars 202. The vertical bars 202 are spaced apart along the length of the conveyor belt 1 and hinged to the conveyor belt support 103. The top horizontal bar 204 and the guide baffle 205 are respectively arranged along the length of the conveyor belt. The top horizontal bar 204 is hinged to the upper end of the vertical bars 202. The guide baffle 205 is located below the top horizontal bar 204 on one side of the conveyor belt 1 and is hinged to the vertical bars 202. The guide baffle 205 and the guardrail are integrated into one structure, which facilitates the overall installation onto the conveyor belt support 103, allows for synchronous operation, simplifies the operation steps, and can also be disassembled synchronously when replacing, making loading, unloading, and operation convenient and improving work efficiency.

[0027] In this embodiment, the top horizontal bar 204 and the upper end of the vertical bar 202 are hinged together by the top pin 213, and the guide baffle 205 and the vertical bar 202 are hinged together by the baffle pin 214.

[0028] The safety railing 2 also includes several bases 201. The lower end of the vertical rod 202 is hinged to the base 201, and the base 201 is fixedly connected to the conveyor belt support 103. The base 201 facilitates the installation of the safety railing 2 as a whole with the conveyor belt support 103. In this embodiment, the base 201 and the conveyor belt support 103 are detachably connected by bolts or fixed by welding. The lower end of the vertical rod 202 is hinged to the base 201 via a bottom pin 211.

[0029] The safety guardrail 2 also includes a top telescopic crossbar 207 and a crossbar locking mechanism. The top telescopic crossbar 207 is located on the side of the top crossbar 204 near the front end 101 of the conveyor belt. The top telescopic crossbar 207 slides with the top crossbar 204 and is locked by the crossbar locking mechanism. The top telescopic crossbar 207 is connected to a soft material buffer head 208 at its end. The top telescopic crossbar 207 is designed so that when the safety guardrail 2 is erected, the extension length can be selected according to the distance to the aircraft cargo hold. It extends forward to block the gap between the front end of the conveyor belt 101 and the aircraft skin, effectively preventing the risk of workers falling when working at the front end of the conveyor belt 101. The buffer head 208 can effectively prevent the aircraft from being damaged when it extends and touches the aircraft skin.

[0030] In this embodiment, the top telescopic crossbar 207 is inserted into the top crossbar 204. The top crossbar 204 has a top guide groove 2041 arranged along its length direction. A handle 209 is fixed on the top telescopic crossbar 207, and the handle 209 passes through the top guide groove 2041. The crossbar locking mechanism uses a locking bolt 210. The top telescopic crossbar 207 has a threaded hole that mates with the locking bolt 210. The locking bolt 210 passes through the top guide groove 2041 and is threadedly connected to the threaded hole. When the locking bolt 210 is tightened, the end of the locking bolt 210 abuts against the top crossbar 204 to lock the top telescopic crossbar 207. When the locking bolt 210 is loosened, the top telescopic crossbar 207 can slide relative to the top crossbar 204. The handle 209 is provided to facilitate dragging the top telescopic crossbar 207 to slide. The locking bolt 210 is used to lock and limit the top telescopic crossbar 207.

[0031] The top telescopic crossbar 207 can also be hollow inside as needed. The top telescopic crossbar 207 is sleeved on the outside of the top crossbar 204. The top telescopic crossbar 207 is provided with a top guide groove 2041 arranged along its length. A handle 209 is fixed on the top telescopic crossbar 207. The top crossbar 204 is provided with a threaded hole that mates with the locking bolt 210. The locking bolt 210 passes through the top guide groove 2041 and is threadedly connected to the threaded hole. When the locking bolt 210 is tightened, the end of the locking bolt 210 abuts against the top telescopic crossbar 207.

[0032] The safety guardrail 2 also includes a central crossbar 203 arranged along the length of the conveyor belt. The central crossbar 203 is located between the top crossbar 204 and the guide baffle 205. The central crossbar 203 is hinged to the middle of several vertical bars 202. By setting the central crossbar 203, the gap between the top crossbar 204 and the conveyor belt 1 is reduced, effectively avoiding the risk of falling when workers lean against the guardrail or work in a squatting position. In this embodiment, the central crossbar 203 is hinged to the middle of the vertical bars 202 via a central pin 212.

[0033] The safety guardrail 2 also includes a central telescopic crossbar 206 and a crossbar locking mechanism. The central telescopic crossbar 206 is located on the side of the central crossbar 203 near the front end 101 of the conveyor belt. The central telescopic crossbar 206 slides with the central crossbar 203 and is locked by the crossbar locking mechanism. The end of the central telescopic crossbar 206 is connected to a soft material buffer head 208; the central telescopic crossbar 206 is set so that when the safety guardrail is erected, the extension length can be selected according to the distance of the aircraft cargo hold, and it extends forward to block the gap between the front end of the conveyor belt 101 and the aircraft skin, effectively preventing the risk of falling when the workers are working at the front end of the conveyor belt 101. The buffer head 208 can effectively prevent the aircraft from being damaged when it extends and touches the aircraft skin.

[0034] In this embodiment, the central telescopic crossbar 206 is inserted into the central crossbar 203. The central crossbar 203 has a central guide groove 2031 arranged along its length direction. A handle 209 is fixed on the central telescopic crossbar 206, and the handle 209 passes through the central guide groove 2031. The crossbar locking mechanism uses a locking bolt 210. The central telescopic crossbar 206 has a threaded hole that mates with the locking bolt 210. The locking bolt 210 passes through the central guide groove 2031 and is threadedly connected to the threaded hole. When the locking bolt 210 is tightened, the end of the locking bolt 210 abuts against the central crossbar 203, locking the central telescopic crossbar 206. When the locking bolt 210 is loosened, the central telescopic crossbar 206 can slide relative to the central crossbar 203. The handle 209 is provided to facilitate dragging the central telescopic crossbar 206 to slide, and the locking bolt 210 is provided to lock and limit the central telescopic crossbar 206.

[0035] A central telescopic crossbar 206 can also be provided as needed, fitted around the central crossbar 203. The central telescopic crossbar 206 has a central guide groove along its length, and a handle 209 is fixed on the central telescopic crossbar 206. The central crossbar 203 has a threaded hole that mates with the locking bolt 210. The locking bolt 210 passes through the central guide groove and is threaded into the threaded hole. When the locking bolt 210 is tightened, the end of the locking bolt 210 abuts against the central telescopic crossbar 206. The handle is provided to facilitate the sliding of the central telescopic crossbar, and the locking bolt is used to lock and limit the central telescopic crossbar.

[0036] In this embodiment, the handle 209 and the locking bolt 210 are located at the end of the top telescopic crossbar 207 and the middle telescopic crossbar 206 away from the aircraft cargo hold, so that the operator does not need to reach the front end of the conveyor belt to operate the handle and the locking bolt, thus improving safety.

[0037] This embodiment also includes a guardrail locking mechanism, in which the safety guardrail 2 is locked in both its folded and upright states by the guardrail locking mechanism. The guardrail locking mechanism includes a connecting frame 215 and a locking pin 216. The connecting frame 215 is provided with a vertical limiting insertion hole 2151 and a folding limiting insertion hole 2152. The vertical rod 202 is provided with a limiting hole. This embodiment is as shown in the appendix. Figure 5 As shown, the connecting frame 215 is fixedly connected to the top horizontal bar 204, and the upper end of the vertical bar 202 is hinged to the connecting frame 215. In this embodiment, the upper end of the vertical bar 202 is hinged to the connecting frame 215 via the top pin 213. When the safety railing 2 is folded, the locking pin 216 is inserted into the limiting hole of the vertical bar 202 via the folding limiting insertion hole 2152. When the safety railing 2 is erected, the locking pin 216 is inserted into the limiting hole of the vertical bar 202 via the erection limiting insertion hole 2151. In this embodiment, it can be seen that the folding limiting insertion hole 2152 on the connecting frame 215 is located above the erection limiting insertion hole 2151.

[0038] In this embodiment, one connecting frame is provided, which works with one of the vertical bars to lock the entire safety railing. Multiple railing locking mechanisms can also be provided as needed.

[0039] The connecting frame 215 can also be fixedly connected to the middle horizontal bar 203 as needed. The middle part of the vertical bar 202 is hinged to the connecting frame 215 via the middle pin. When the safety guardrail 2 is folded, the locking pin 216 is inserted into the limiting hole of the vertical bar 202 through the folding limiting insertion hole 2152. When the safety guardrail 2 is erected, the locking pin 216 is inserted into the limiting hole of the vertical bar 202 through the erection limiting insertion hole 2151. The connecting frame 215 can also be fixedly connected to the guide baffle 205 as needed. The vertical rod 202 and the connecting frame 215 are hinged through the baffle pin. When the safety guardrail 2 is folded, the locking pin 216 is inserted into the limiting hole of the vertical rod 202 through the folding limiting insertion hole 2152. When the safety guardrail 2 is erected, the locking pin 216 is inserted into the limiting hole of the vertical rod 202 through the erection limiting insertion hole 2151. The structure is simple to ensure that the safety railing locks in place when folded or erected.

[0040] Choose the locking position of the guardrail as needed, as long as it can be locked securely without wobbling when the guardrail is folded or erected.

[0041] As attached Figure 6 As shown, a bracket 217 is fixed on the base 201, and a buffer pad 218 is fixed on the bracket. When the safety railing 2 is folded, the top crossbar 204 and / or the middle crossbar 203 abut against the buffer pad 218. The buffer pad 218 is provided to provide cushioning, shock absorption and noise reduction when the safety railing 2 is folded.

[0042] In this embodiment, the buffer pad 218 is installed in such a way that when the safety railing 2 is folded, the top crossbar 204 can rest against the buffer pad 218. Alternatively, the position and height of the buffer pad 218 can be set as needed so that the middle crossbar 203 rests against the buffer pad 218, or both the top crossbar 204 and the middle crossbar 203 rest against the buffer pad 218.

[0043] This embodiment is as shown in the appendix. Figure 3 As shown, the safety guardrail 2 is folded down towards the rear end 102 of the conveyor belt to ensure that the end of the safety guardrail 2 does not touch the aircraft skin when folded.

[0044] This embodiment also includes a booster spring. A booster spring is provided between the base 201 and the vertical rod 202 or the middle horizontal rod 203. The lower end of the booster spring is connected to the base 201, and the upper end is connected to the vertical rod 202 or the middle horizontal rod 203. And / or, an assisting spring is provided between the top horizontal bar 204 and the vertical bar 202 or the middle horizontal bar 203. The upper end of the assisting spring is connected to the top horizontal bar 204, and the lower end is connected to the vertical bar 202 or the middle horizontal bar 203. When the safety railing 2 is folded, the assisting spring is in an energy storage state. When the safety railing 2 needs to be erected, the locking of the safety railing is released, and the restoring force of the assisting spring can assist in the erection of the safety railing, making the operation more labor-saving.

[0045] The first method of installing the power assist spring: An assist spring is provided between the base 201 and the vertical rod 202. The lower end of the assist spring is connected to the bracket 217, and the upper end is connected to the middle of the vertical rod 202. The energy storage method (tension energy storage or compression energy storage) when the safety guardrail is folded varies depending on the connection position of the assist spring, and can be set according to actual needs. When the safety guardrail is folded for tension energy storage, a helical spring can be used. When the safety guardrail is folded for compression energy storage, a helical spring or a gas spring can be used.

[0046] In this embodiment, as shown Figure 6 As shown, the lower end of the assist spring is connected to the front side of the base (i.e., the side near the front end of the conveyor belt), and the upper end is connected to the front side of the vertical bar (i.e., the side near the front end of the conveyor belt). When the safety guardrail is folded, the assist spring is in a stretched state to store energy. When the safety guardrail 2 needs to be lifted, the restoring force of the assist spring can assist the safety guardrail 2 to stand up. The assist spring is a helical spring 219.

[0047] Alternatively, the lower end of the assist spring can be connected to the rear side of the base (i.e., the side near the rear end of the conveyor belt), and the upper end can be connected to the rear side of the vertical bar (i.e., the side near the rear end of the conveyor belt). When the safety guardrail is folded, the assist spring is in a compressed state to store energy. When the safety guardrail 2 needs to be lifted, the restoring force of the assist spring can assist the safety guardrail 2 to stand up. In this state, the assist spring can be a helical spring or a gas spring.

[0048] The second method for installing the power assist spring: An assist spring is provided between the base 201 and the middle crossbar 203. The lower end of the assist spring is connected to the bracket 217, and the upper end is connected to the middle crossbar 203. The energy storage method (tension energy storage or compression energy storage) when the safety guardrail is folded varies depending on the connection position of the assist spring. It can be set according to actual needs. When the safety guardrail is folded for tension energy storage, a helical spring can be used. When the safety guardrail is folded for compression energy storage, a helical spring or a gas spring can be used.

[0049] The third way to install the power assist spring: An assist spring is provided between the top horizontal bar 204 and the vertical bar 202. The upper end of the assist spring is connected to the top horizontal bar 204, and the lower end is connected to the middle of the vertical bar 202. The energy storage method (tension energy storage or compression energy storage) when the safety guardrail is folded varies depending on the connection position of the assist spring. It is set according to actual needs. When the safety guardrail is folded for tension energy storage, a helical spring can be used. When the safety guardrail is folded for compression energy storage, a helical spring or a gas spring can be used.

[0050] In this embodiment, the assist spring is a gas spring 220. The upper end of the gas spring 220 is hinged to the top horizontal bar 204, and the lower end is hinged to the middle of the vertical bar 202. When the safety railing is folded, the gas spring 220 is in a compressed state to store energy. When the safety railing 2 needs to be lifted, the restoring force of the gas spring can assist the safety railing to stand up.

[0051] The fourth way to install the power assist spring: An assist spring is provided between the top crossbar 204 and the middle crossbar 203. The upper end of the assist spring is connected to the top crossbar 204, and the lower end is connected to the middle crossbar 203. The energy storage method (tension energy storage or compression energy storage) when the safety guardrail is folded varies depending on the connection position of the assist spring. It is set according to actual needs. When the safety guardrail is folded for tension energy storage, a helical spring can be used. When the safety guardrail is folded for compression energy storage, a helical spring or a gas spring can be used. When a gas spring is used, the upper end of the gas spring is hinged to the top crossbar 204, and the lower end is hinged to the middle crossbar 203.

[0052] Regarding the assist spring, the tension and compression states of the spring differ depending on the connection position when the safety railing is folded. The installation position and number of assist springs can be selected according to actual usage needs to ensure that the operation of the safety railing is assisted.

[0053] When using this utility model: 1. When the loader needs to load or unload goods, the front end 101 of the loader's conveyor belt docks with the aircraft's cargo hold; 2. The operator pulls out the locking pin 216 to release the lock of the safety railing 2, and lifts the safety railing 2. The restoring force of the coil spring 219 and the gas spring 220 assists in the uprighting of the safety railing 2. At this time, the guide baffle 205, the middle crossbar 203, and the top crossbar 204 are lifted simultaneously. After the safety railing 2 is upright, the locking pin 216 is inserted into the upright limiting hole 2151 of the connecting frame 215 and the limiting hole on the vertical bar 202 to ensure the stability of the safety railing 2 after it is upright. The guide baffle 205 guides the goods conveyed on the conveyor belt 1 on both sides of the conveyor belt and prevents the goods from falling off. The top crossbar 204 and the middle crossbar 203 work together to prevent the goods from falling off and to prevent the operator from falling. 3. After the safety railing 2 is erected, loosen the locking bolts 210 on the top telescopic crossbar 207 and the middle telescopic crossbar 206. The operator holds the handles 209 on the top telescopic crossbar 207 and the middle telescopic crossbar 206 and extends the top telescopic crossbar 207 and the middle telescopic crossbar 206 forward to approach the aircraft cargo hold, eliminating the gap between the aircraft cargo hold and the front side of the safety railing 2 to prevent the operator from falling. After the top telescopic crossbar 207 and the middle telescopic crossbar 206 are extended into place, tighten the locking bolts 210 on the top telescopic crossbar 207 and the middle telescopic crossbar 206 respectively to lock the position of the top telescopic crossbar 207 and the middle telescopic crossbar 206. 4. After the operation is completed, the operator loosens the locking bolts 210 on the top telescopic crossbar 207 and the middle telescopic crossbar 206, holds the handles 209 on the top telescopic crossbar 207 and the middle telescopic crossbar 206, and retracts the top telescopic crossbar 207 and the middle telescopic crossbar 206. After retracting, the operator tightens the locking bolts 210 on the top telescopic crossbar 207 and the middle telescopic crossbar 206. 5. The operator pulls out the locking pin 216 and folds the safety railing 2. At this time, the guide baffle 205, the middle crossbar 203, and the top crossbar 204 are folded simultaneously. After the safety railing 2 is folded, the locking pin 216 is inserted into the folding limit hole 2152 of the connecting frame 215 and the limit hole of the vertical bar 202 to lock the safety railing in the folded state.

Claims

1. A safety guardrail for a bulk cargo loader, characterized in that: It includes a guide baffle, a top horizontal bar and several vertical bars. The several vertical bars are spaced apart along the length of the conveyor belt and are hinged to the conveyor belt support. The top horizontal bar is hinged to the upper end of the vertical bars. The guide baffle is located below the top horizontal bar on one side of the conveyor belt and is hinged to the vertical bars.

2. The safety guardrail for a bulk cargo loader according to claim 1, characterized in that: The safety railing also includes several bases, the lower end of the vertical bar is hinged to the base, and the base is fixedly connected to the conveyor belt support.

3. A safety guardrail for a bulk cargo loader according to claim 1 or 2, characterized in that: The safety railing also includes a top telescopic crossbar and a crossbar locking mechanism, wherein the top telescopic crossbar is slidably engaged with the top crossbar and locked by the crossbar locking mechanism; The end of the top telescopic crossbar is connected to a buffer head.

4. A safety guardrail for a bulk cargo loader according to claim 3, characterized in that: The top telescopic crossbar is inserted into the top crossbar. The top crossbar has a top guide groove that runs along its length. A handle is fixed on the top telescopic crossbar and extends out of the top guide groove. The crossbar locking mechanism uses a locking bolt. The top telescopic crossbar has a threaded hole that mates with the locking bolt. The locking bolt passes through the top guide groove and is threaded into the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the top crossbar. Alternatively, the top telescopic crossbar is sleeved on the outside of the top crossbar, and the top telescopic crossbar is provided with a top guide groove arranged along its length direction. A handle is fixed on the top telescopic crossbar. The crossbar locking mechanism adopts a locking bolt, and the top crossbar is provided with a threaded hole that mates with the locking bolt. The locking bolt passes through the top guide groove and is threadedly connected to the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the top telescopic crossbar.

5. A safety guardrail for a bulk cargo loader according to claim 2, characterized in that: The safety railing also includes a central horizontal bar, which is located between the top horizontal bar and the guide baffle, and is hinged to the middle of the vertical bar.

6. A safety guardrail for a bulk cargo loader according to claim 5, characterized in that: The safety railing also includes a central telescopic crossbar and a crossbar locking mechanism. The central telescopic crossbar is slidably engaged with the central crossbar and locked by the crossbar locking mechanism. The end of the central telescopic crossbar is connected to a buffer head.

7. A safety guardrail for a bulk cargo loader according to claim 6, characterized in that: The central telescopic crossbar is inserted into the interior of the central crossbar. The central crossbar has a central guide groove that runs along its length. A handle is fixed to the central telescopic crossbar and extends out of the central guide groove. The crossbar locking mechanism uses a locking bolt. The central telescopic crossbar has a threaded hole that mates with the locking bolt. The locking bolt passes through the central guide groove and is threaded into the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the central crossbar. Alternatively, the central telescopic crossbar is sleeved outside the central crossbar, and the central telescopic crossbar is provided with a central guide groove arranged along its length direction. A handle is fixed on the central telescopic crossbar. The crossbar locking mechanism adopts a locking bolt, and the central crossbar is provided with a threaded hole that mates with the locking bolt. The locking bolt passes through the central guide groove and is threadedly connected to the threaded hole. When the locking bolt is tightened, the end of the locking bolt abuts against the central telescopic crossbar.

8. A safety guardrail for a bulk cargo loader according to claim 5, characterized in that: It is also equipped with a guardrail locking mechanism, which locks the safety guardrail in both folded and upright states. The guardrail locking mechanism includes a connecting frame and a locking pin. The connecting frame is provided with a vertical limiting hole and a folding limiting hole, and the vertical rod is provided with a limiting hole. The connecting frame is fixedly connected to the top crossbar, the middle crossbar, or the guide baffle. The vertical bar is hinged to the connecting frame. When the safety railing is folded, the locking pin is inserted into the limiting hole of the vertical bar through the folding limiting hole. When the safety railing is erected, the locking pin is inserted into the limiting hole of the vertical bar through the erection limiting hole.

9. A safety guardrail for a bulk cargo loader according to claim 5, characterized in that: It is also equipped with a booster spring. A booster spring is provided between the base and the vertical rod or the middle horizontal rod. The lower end of the booster spring is connected to the base, and the upper end is connected to the vertical rod or the middle horizontal rod. And / or, an assisting spring is provided between the top crossbar and the vertical bar or the middle crossbar, the upper end of the assisting spring being connected to the top crossbar and the lower end being connected to the vertical bar or the middle crossbar.

10. A safety guardrail for a bulk cargo loader according to claim 9, characterized in that: The assist spring is either a helical spring or a gas spring.

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