Roller shutter door of boxcar

Abstract

The utility model discloses a roller shutter door, belongs to the technical field of roller shutter door structures, and particularly relates to a boxcar roller shutter door which comprises a right-angle guide rail installed at the tail of a boxcar, a door leaf is formed by connecting a plurality of narrow long-strip-shaped plates through hinges, and idler wheels capable of sliding in the guide rail are installed on the two sides of the door leaf so that the door leaf can stably slide along the guide rail. The transverse rod is installed on a carriage door frame through a rotating support and is fixedly provided with a steel wire rope wheel, the steel wire rope is wound on the steel wire rope wheel, the tail end of the steel wire rope is connected with the bottom of the door leaf, and in addition, a limiting block is designed at the tail end of the guide rail to prevent the door body from sliding out of the guide rail due to faults or abnormal conditions. A lock groove matched with the door lock is formed in the bottom of the compartment, so that the door leaf can be firmly locked; the roller shutter door is compact in structure, the external space of a carriage is saved, and meanwhile, more efficient and convenient operation experience can be provided when cargoes are loaded and unloaded.

Description

Technical Field

[0001] This utility model discloses a roller shutter door, belonging to the technical field of roller shutter door structure, specifically relating to a truck carriage roller shutter door. Background Technology

[0002] Traditional truck bodies typically feature two doors at the rear that open to the sides, secured by hinges or latches, with a lock in the middle. However, this design is inefficient in confined spaces (such as parking lots and loading / unloading areas), hindering loading and unloading operations. Therefore, there is an urgent need for a truck body door design that saves external space and allows for quick and easy operation. Utility Model Content

[0003] Purpose of the utility model: To provide a truck bed roller shutter door to solve the problems mentioned above.

[0004] Technical solution: A truck cargo box roller shutter door, comprising: guide rail, door body, crossbar, roller, single spring mechanism, double spring mechanism and locking mechanism;

[0005] In a further embodiment, the guide rail is provided in two sets, which are formed by combining three rail bodies and are in a ┐ shape. The guide rail is installed inside the carriage. The door body includes a middle plate, a top plate and a bottom plate, and is formed by connecting multiple narrow and long strip plates through side hinges and a central hinge. The door body is rotatably mounted on the crossbar of the carriage door lintel through two bearings. The rollers are slidably mounted in the guide rails on both sides of the door body to drive the door body to slide in the guide rails.

[0006] In a further embodiment, the single spring mechanism is mounted on the crossbar and connected to the door body, including: a first wire rope wheel fixed on the crossbar, a first wire rope wound on the first wire rope wheel, and the end of the first wire rope being connected to a wire rope hook at the bottom of the bottom plate of the door body.

[0007] In a further embodiment, the double-spring mechanism is mounted on the crossbar and connected to the door body, including: a second wire rope wheel fixed on the crossbar, a second wire rope wound on the second wire rope wheel, and the end of the second wire rope being connected to the wire rope hook at the bottom of the bottom plate of the door body;

[0008] In a further embodiment, the locking mechanism is installed on the bottom plate of the door and consists of a door lock, a lock hook, and a latch. The door lock and the lock hook are installed at the bottom of the bottom plate, and the latch cooperates with the door lock and the lock hook.

[0009] In a further embodiment, the single spring mechanism further includes a first torsion spring, which is sleeved on the crossbar. One end of the first torsion spring is fixed to a torsion spring bracket via a torsion spring base and a bearing. The torsion spring bracket is fixed to the carriage. The other end of the first torsion spring is fixed to the crossbar via a first torsion spring adjusting seat.

[0010] In a further embodiment, the dual-spring mechanism further includes: a second torsion spring, two of which are provided and sleeved on the crossbar, one end of the second torsion spring being fixed to the carriage by a fixing seat and a bracket, and the other end of the second torsion spring being fixed to the crossbar by a second torsion spring adjusting seat.

[0011] In a further embodiment, side sealing strips are installed on both sides of the door frame of the carriage, an upper sealing strip is installed on the top plate of the door, and a lower sealing strip is installed under the bottom plate of the door.

[0012] In a further embodiment, the bottom plate of the door is equipped with a handle and a pull strap.

[0013] In a further embodiment, the door lock and the lock hook are fixed to the bottom plate of the door body, the lock buckle is fixed in the lock groove at the bottom of the carriage, and the door lock is provided with a cooperating lock tongue.

[0014] In a further embodiment, the door lock offers three installation options: outward opening, inward opening, and both inward and outward opening. During operation, the safety device must first be manually unlocked to release the lock handle. After unlocking, the bolt is in a lockable state. When locking the door, the operator manually pulls down the door and rotates the lock handle to insert the bolt into the lock slot and engage with the latch, ensuring the door is securely closed. At this time, the latch tightly engages with the lock handle to prevent accidental opening during use. A keyhole is also provided on the latch, allowing the customer to configure whether locking is required. To unlock, the operator manually unlocks the latch, releasing its fixation. The bolt then disengages from the latch, allowing the door to open smoothly.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model is compatible with various types of materials for making door bodies, including aluminum, wood, and composite materials. According to customer needs, this utility model can be customized to produce corresponding products.

[0017] 2. This utility model uses two types of hinges to connect the door body. For the two sides of the door body where rollers need to be installed, this utility model uses side hinges, and for the middle of the door body, this utility model uses center hinges.

[0018] 3. This utility model provides two types of torsion spring assemblies (spring mechanisms) to cope with doors of different sizes and materials. For smaller and lighter doors, a single spring mechanism can be selected, while for larger and heavier doors, a double spring mechanism can be selected.

[0019] 4. This utility model adds a pull strap to the bottom plate of the door panel, which is convenient for customers when facing high door openings that are difficult to pull the door open. It is also an added humanized feature.

[0020] 5. This utility model door lock provides three installation methods: inward opening, outward opening, and double opening (inward and outward), which can be selected according to customer needs.

[0021] 6. Anti-collision blocks have been added to the ends of the guide rails to prevent the door from sliding off the guide rails in case of abnormality or malfunction. Attached Figure Description

[0022] Figure 1 This is an exploded structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of this utility model installed on the side of the carriage.

[0024] Figure 3 This is a schematic diagram of the locking mechanism of this utility model.

[0025] Reference numerals: Top plate (1), Middle plate (2), Bottom plate (3), Guide rail (4 / 5 / 6), Limiting block (8), Side sealing strip (9), Wire rope hook (10), Lower sealing strip (12), Pull strap (13), Handle (15), Door lock (17), Lock tongue (19), Lock buckle (20), Lock hook (21), Side hinge (27), Center hinge (30), Roller (33), Double spring mechanism (38), Single spring mechanism (39), Torsion spring bracket (40), Bearing (44 / 45), First wire rope wheel (47 / 48), First torsion spring adjusting seat (50), Torsion spring base (51), Crossbar (53 / 74), Wire rope (55), Upper sealing strip (57), First torsion spring (52), Second wire rope wheel (73 / 82), Second torsion spring (76), Bracket (70 / 83), Second torsion spring adjusting seat (77). Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0029] A truck cargo box roller shutter door includes: guide rails (4 / 5 / 6), door body, crossbars (53 / 74), rollers (33), single spring mechanism (39), double spring mechanism (38) and locking mechanism.

[0030] In one embodiment, such as Figure 1 As shown, the roller shutter door includes a "┐" shaped guide rail (4&5&6) installed inside the carriage. The door body includes: a top plate (1), a middle plate (2), a bottom plate (3), and a crossbar (53) rotatably mounted on the lintel of the carriage door via a side hinge (27) and a center hinge (30) composed of multiple narrow strip plates. The crossbar (53) is rotatably mounted on the lintel of the carriage door via bearings (44&45). Rollers (33) that can slide in the guide rail (4&5&6) are installed on both sides of the door body, so that the door body can slide along the guide rail (4&5&6).

[0031] In one embodiment, such as Figure 1 As shown, the first wire rope wheel (47 & 48) is fixed on the crossbar (53) of the single spring mechanism (39). The wire rope (55) is wound on the first wire rope wheel (47 & 48), and its end is connected to the wire rope hook (10) installed at the bottom of the base plate (3).

[0032] In one embodiment, such as Figure 1As shown, a second wire rope wheel (73 & 82) is fixed on the crossbar (74) of the double spring mechanism (38). The wire rope (55) is wound on the second wire rope wheel (73 & 82), and its end is connected to the wire rope hook (10) installed at the bottom of the base plate (3).

[0033] In one embodiment, such as Figures 1 to 3 As shown, the bottom of the base plate (3) is equipped with a door lock (17), and the bottom of the corresponding carriage is equipped with a latch (20) that cooperates with the door lock (17) and the latch (21).

[0034] In one embodiment, such as Figure 1 As shown, the first torsion spring (52) of the single spring mechanism (39) is sleeved on the crossbar (53). One end of the spring is fixed to the torsion spring bracket (40) through the torsion spring base (51) and the bearing (45). The torsion spring bracket (40) is fixed to the carriage. The other end is fixed to the crossbar (53) through the first torsion spring adjusting seat (50).

[0035] In one embodiment, such as Figure 1 As shown, two second torsion springs (76) are sleeved on the crossbar (74) of the double spring mechanism (38). One end of each of the two second torsion springs (76) is fixed to the carriage by a fixed seat combined with a bracket (70 & 83), and the other end is fixed to the crossbar (74) by a second torsion spring adjusting seat (77).

[0036] In the above, the purpose of the single spring mechanism (39) and the double spring mechanism (38) is to allow the door to be closed by means of the torsion force of the torsion spring, so that the door will not drop to the lowest position instantly when the door is pulled down, thus playing a role in slow descent; when it is to be opened, the torsion spring can be used to reduce the pulling force of opening the door upward, making it easier to open the door.

[0037] In one embodiment, such as Figure 1 As shown, the door frame of the carriage is equipped with side sealing strips (9) on both sides, the top plate (1) is equipped with an upper sealing strip (57) on the top side, and the bottom plate (3) is equipped with a lower sealing strip (12) on the bottom side.

[0038] In one embodiment, such as Figure 1 As shown, the base plate (3) is equipped with a handle (15) and a pull strap (13).

[0039] In one embodiment, such as Figure 1As shown, the door lock (17) and lock hook (21) are fixed on the base plate (3), and the lock buckle (20) is fixed in the lock groove at the bottom of the carriage. The door lock (17) offers three installation options: outward opening, inward opening, and double opening (inward and outward). During operation, the protective device must first be manually unlocked to release the lock on the door lock (17) handle. After unlocking, the latch (19) is in the lockable state. When the door needs to be locked, the operator manually pulls down the door and manually rotates the lock handle to insert the latch (19) into the lock groove and engage with the lock buckle (20), thereby ensuring that the door is securely closed. At this time, the lock hook (21) is tightly engaged with the door lock (17) handle to prevent the door from being accidentally opened during use. At the same time, a lock hole is provided on the lock hook (21), and the customer can configure whether to lock it according to their own needs. When unlocking, the operator manually unlocks the lock hook (21). After the lock hook (21) is released, the lock tongue (19) can be disengaged from the lock latch (20), and the door can be opened smoothly.

[0040] In one embodiment, such as Figure 1 As shown, a limiting block (8) is provided at one end of the guide rail.

[0041] The main technical solution of this utility model is as follows: The roller shutter door includes a "┐"-shaped guide rail installed at the rear of the carriage. The door leaf is made of multiple narrow and long strip plates (aluminum profiles, composite materials, wood, etc.) connected by hinges. Rollers that can slide within the guide rail are installed on both sides of the door leaf, allowing the door leaf to slide smoothly along the guide rail. A crossbar is installed on the carriage door frame via a rotating bracket and a wire rope wheel is fixed thereon. The wire rope is wound on the wire rope wheel, and its end is connected to the bottom of the door leaf. In addition, a limit block is designed at the end of the guide rail to prevent the door from sliding off the guide rail due to malfunction or abnormal conditions. The bottom of the door leaf is equipped with a door lock, handle, and pull strap. A lock groove that cooperates with the door lock is set at the bottom of the carriage to ensure that the door leaf can be securely locked.

[0042] When opening this utility model, the door lock hook must first be unlocked, and then the door leaf is lifted upwards. A torsion spring provides assistance through its rebound force, allowing the door leaf to move upwards more easily. Simultaneously, a steel wire rope, wound through a wire rope pulley, drives the door leaf to slide upwards along the guide rail, ultimately retracting the door leaf to the top of the truck bed. To close, the door leaf needs to be manually pulled down, and the safety device unlocked before locking. The latch engages with the latch to ensure the door leaf is securely closed. This roller shutter door design effectively saves external space in the truck bed, is simple and efficient to operate, and provides great convenience for drivers when loading and unloading goods.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A truck cargo box roller shutter door, characterized in that, include: Guide rails, door body, crossbars, rollers, single spring mechanism, double spring mechanism and locking mechanism; The guide rail is provided in two sets, which are formed by the combination of three rail bodies and are in a ┐ shape. The guide rail is installed inside the carriage. The door body includes a middle plate, a top plate and a bottom plate, and is formed by connecting multiple narrow and long strip plates through side hinges and a central hinge. The door body is rotatably installed on the crossbar of the carriage door lintel through two bearings. The rollers are slidably installed in the guide rails on both sides of the door body to drive the door body to slide in the guide rails. The single spring mechanism is mounted on the crossbar and connected to the door body, and includes: a first wire rope wheel fixed on the crossbar, a first wire rope wound on the first wire rope wheel, and the end of the first wire rope being connected to the wire rope hook at the bottom of the bottom plate of the door body. The double-spring mechanism is installed on the crossbar and connected to the door body, including: a second wire rope wheel fixed on the crossbar, a second wire rope wound on the second wire rope wheel, and the end of the second wire rope being connected to the wire rope hook at the bottom of the bottom plate of the door body; The locking mechanism is installed on the bottom plate of the door and consists of a door lock, a lock hook, and a latch. The door lock and the lock hook are installed at the bottom of the bottom plate, and the latch cooperates with the door lock and the lock hook.

2. The truck bed roller shutter door according to claim 1, characterized in that, The single spring mechanism further includes a first torsion spring, which is sleeved on the crossbar. One end of the first torsion spring is fixed to the torsion spring bracket by a torsion spring base and a bearing. The torsion spring bracket is fixed to the carriage. The other end of the first torsion spring is fixed to the crossbar by a first torsion spring adjusting seat. The dual-spring mechanism further includes: a second torsion spring, two of which are sleeved on the crossbar, one end of the second torsion spring being fixed to the carriage by a fixing seat and a bracket, and the other end of the second torsion spring being fixed to the crossbar by a second torsion spring adjusting seat.

3. The truck bed roller shutter door according to claim 1, characterized in that, The door frame of the carriage is equipped with side sealing strips on both sides, an upper sealing strip is installed on the top plate of the door, and a lower sealing strip is installed under the bottom plate of the door.

4. The truck bed roller shutter door according to claim 1, characterized in that, The bottom plate of the door is equipped with handles and pull straps.

5. A truck bed roller shutter door according to claim 1, characterized in that, The door lock and the lock hook are fixed to the bottom plate of the door body, and the lock buckle is fixed in the lock groove at the bottom of the carriage.

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