Door lock structure of container thermal insulation door

Abstract

The utility model relates to the field of containers, in particular to a door lock structure of a container heat preservation door, the heat preservation door comprises an inner plate and an outer plate, the door lock structure comprises a PVC bowl-shaped section bar and a lock body, the PVC bowl-shaped section bar is arranged on the heat preservation door in a penetrating mode, and the outer edge of an opening of the PVC bowl-shaped section bar is fixed to the side, facing the inner space of a container body, of the inner plate; the lock body comprises an internal handle, a screw rod, an internally-opened gear and a spring bolt body, the internal handle and the screw rod are both arranged in the PVC bowl-shaped profile, and the internally-opened gear and the spring bolt body are both arranged on the outer side of the box body; the screw is rotatably connected to the PVC bowl-shaped profile, the two ends of the screw are fixedly connected with the internal handle and the internally-opened gear respectively, the internally-opened gear is meshed with the spring bolt body, and the spring bolt body can be moved by rotating the internal handle to achieve inward opening of the door. The novel door lock structure is adopted, the internal handle is changed into a rotatable structure, and the stroke and the concave space required by the PVC bowl-shaped section bar in the vertical direction of the heat preservation door are reduced, so that the thickness of the heat preservation material is ensured, better heat preservation performance is obtained, and the loss of electric energy is reduced.

Description

Technical Field

[0001] The utility model relates to the field of containers, in particular to a lock structure for a thermal insulation door of a container. Background Art

[0002] Special refrigerated boxes frequently open and close their doors, and workers must be prevented from being trapped inside. Internally-openable locks, referred to as internal safety locks, are often used on insulated doors. At the same time, in order to prevent internal cargo from hitting the inner wall and accidentally triggering the safety lock, the internal safety lock often needs to be sunk into the wall. For example, the safety door lock structure disclosed in patents such as application number CN201821762726.9 utilizes a push rod sunk into the wall to enable the insulated door to be opened from the inside. However, a certain stroke is required when the push rod is pushed, and this stroke will increase the depth of the groove sunk into the wall, thereby reducing the insulation thickness of the door panel in this area and reducing the insulation performance. At the same time, the existing technology still has the problem of small, irregular cargo hitting the internal safety lock, causing the door to be opened. Utility Model Content

[0003] The purpose of the utility model is to provide a container insulation door lock structure, which replaces the original push rod mechanism with a new door lock mechanism, reduces the vertical stroke of the insulation door, and obtains better insulation performance.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a door lock structure for an insulated door of a container, wherein the insulated door includes an inner plate and an outer plate, and the door lock structure includes a PVC bowl-shaped profile and a lock body, wherein the PVC bowl-shaped profile is arranged through the insulated door, and the outer edge of the opening of the PVC bowl-shaped profile is fixed to the side of the inner plate facing the internal space of the box; the lock body includes an internal handle, a screw, an inner gear and a lock tongue body, wherein the internal handle and the screw are both arranged inside the PVC bowl-shaped profile, and the inner gear and the lock tongue body are both arranged outside the box; the screw is rotatably connected to the PVC bowl-shaped profile, and the two ends of the screw are fixedly connected to the internal handle and the inner gear respectively, and the inner gear is engaged with the lock tongue body, and rotating the internal handle can move the lock tongue body to realize the inward opening of the door.

[0005] Preferably, the lock body also includes an external handle, a stud and an external gear arranged on the outside of the box body, and the two ends of the stud are fixedly connected to the external handle and the external gear respectively; the lock tongue body has two groups of upper and lower symmetrical racks, and the two groups of racks are respectively engaged with the internal gear and the external gear, and the engaging positions are staggered in the length direction of the lock tongue body.

[0006] Preferably, both the externally opened gear and the internally opened gear are half-toothed gear columns, and the half-toothed gear columns are sector-shaped columns with teeth on an arc surface.

[0007] Preferably, the lock body also includes a lock shell and a lock shell cover, the lock shell cover is fixed to the outer plate, and the lock shell cover is detachably connected to the lock shell; the lock tongue body is slidably arranged inside the lock shell, and the lock tongue of the lock tongue body is located at the same end of the two sets of racks, and the lock shell is provided with a lock opening for the lock tongue to retract and retract; the stud passes through the lock shell and is rotatably connected to the lock shell, and the external gear is rotatably connected to the lock shell cover; the screw passes through the lock shell cover, and the internal gear is rotatably connected to the lock shell.

[0008] Preferably, a spring and a spring stopper are provided between the two groups of racks, the spring stopper is fixed to the lock housing, and two ends of the spring are respectively in contact with the spring stopper and the lock tongue.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. This utility model adopts a new door lock structure, changes the internal handle into a rotatable structure, reduces the required stroke and concave space of the PVC bowl-shaped profile in the vertical direction of the insulation door, thereby ensuring the thickness of the insulation material, thereby obtaining better insulation performance and reducing energy loss.

[0011] 2. The utility model adopts a rotating handle inside to avoid the safety problem of small and micro goods hitting the inside of the PVC bowl-shaped profile and squeezing the internal lock handle to open the door, thereby enhancing the stability of the internal handle.

[0012] 3. The utility model adopts the coordination of two staggered gears and a rack to concentrate the structures of the inner-opening door and the outer-opening door inside the lock tongue body, and utilizes the meshing mechanism to drive the lock tongue to retract. The inner and outer structures are independent of each other and do not affect each other. At the same time, a spring is used to reset the lock tongue, thereby enhancing practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional structural diagram between the embodiment of the utility model and the thermal insulation door;

[0014] Figure 2 It is a cross-sectional structural diagram of an embodiment of the present utility model;

[0015] Figure 3 This is an exploded structural diagram of an embodiment of the present utility model;

[0016] Figure 4 This is a schematic diagram of the lock body structure of an embodiment of the present utility model (the lock housing and lock housing cover are hidden). DETAILED DESCRIPTION

[0017] The utility model discloses a container insulation door lock structure, including a PVC bowl-shaped profile 4 and a lock body 1. The insulation door 5 of a conventional refrigerated container is formed by an outer plate 51, an inner plate 53 and a foam body 52. A circular groove needs to be cut on the inner plate 53 for the installation of the PVC bowl-shaped profile 4. The utility model sets an internal handle 21 with a rotation operation mode inside the PVC bowl-shaped profile 4 to avoid the safety problem of small and micro goods hitting the original push rod handle and causing the door to be opened. Therefore, the depth of the PVC bowl-shaped profile 4 in the utility model is thinner than the conventional one, thereby ensuring the thickness of the foam body 52 near the lock body 1, improving the insulation performance compared with the conventional one, and having the advantage of reducing the loss of electric energy. Based on the above scheme, combined with Figures 1 to 4 , a specific embodiment of the present utility model is described.

[0018] The lock body 1 includes a lock shell 11, a lock shell cover 12, a lock tongue body 13, and two sets of door opening components. The lock shell cover 12 is fixedly connected to the outer plate 51 by welding, riveting, or bolts. The lock shell cover 12 and the lock shell 11 are detachably connected at the edge of the lock shell cover 12 by a similar connection method. The lock tongue body 13 is arranged in the internal space of the lock shell 11, and the lock shell 11 provides the lock tongue body 13 with a sufficient length range for its extension and contraction. The cross-section of the lock tongue body 13 is U-shaped, and its exterior is slidably fitted with the interior of the lock shell 11. The interior has two sets of vertically symmetrical racks 132. The lock tongue 131 of the lock tongue body 13 is located at the same end of the two sets of racks 132. The lock shell 11 is provided with a lock port 111 for the lock tongue 131 to extend and contract.

[0019] The two groups of door opening components are respectively an inner door opening component and an outer door opening component.

[0020] The inner-opening door assembly includes an inner handle 21, a screw 22 and an inner-opening gear 23. The PVC bowl-shaped profile 4 passes through the thermal insulation door 5 perpendicularly. The outer edge of the opening of the PVC bowl-shaped profile 4 is fixed to the side of the inner plate 53 facing the inner space of the box, and the PVC bowl-shaped profile 4 has a handle groove 41 and a screw 22 groove that are connected. The handle groove 41 faces the inner space of the box, and the screw 22 groove passes through the outer plate 51 perpendicularly to the thermal insulation door 5. The handle groove 41 corresponds to the inner handle 21, and the screw 22 groove corresponds to the screw 22. The screw 22 is connected to the PVC bowl-shaped profile 4 through a bearing inside the screw 22 groove. The two ends of the screw 22 have a threaded structure, which is fixedly connected to the inner handle 21 and the inner-opening gear 23 respectively.

[0021] The internal gear 23 is located inside the lock bolt body 13, between the two sets of racks 132. The lock housing cover 12 has a perforation for the screw 22 to pass through, facilitating connection between the screw 22 and one end of the internal gear 23, allowing the internal gear 23 to receive the force of the internal door opening. The other end of the internal gear 23 is connected to a bearing in the lock housing 11, which provides positioning and support for the internal gear 23. To further reduce the space occupied by the handle recess 41, the rotation axis of the internal handle 21 can be designed to pass through its center, minimizing the required space when rotating. Furthermore, the rotation axes of the internal handle 21, internal gear 23, and screw 22 are collinear, so rotating the internal handle 21 drives the internal gear 23 to rotate synchronously.

[0022] The outward-opening door assembly is located outside the lock housing and includes an external handle 24, a stud 25, and an outward-opening gear 26. The stud 25 passes through the lock housing 11 and is rotatably connected to the lock housing 11. The stud 25 and the lock housing 11 can be connected by a bearing, or a certain gap can be maintained between the two to ensure that the stud 25 can rotate. Both ends of the stud 25 have a threaded structure, which is fixedly connected to the external handle 24 and the outward-opening gear 26 respectively. The external handle 24 is located outside the lock housing 11 and can be operated normally by employees outside the lock housing.

[0023] An external gear 26 is located inside the bolt body 13, between the two sets of racks 132. One end of the external gear 26 is connected to the stud 25, receiving the force required to open the door. The other end is connected to the lock housing cover 12 via a bearing, which provides positioning and support for the external gear 26. The rotation axes of the external handle 24, external gear 26, and stud 25 are collinear, so turning the external handle 24 drives the external gear 26 to rotate synchronously.

[0024] In order to realize that the outer handle 24 and the inner handle 21 work independently without interfering with each other, the inner gear 23 and the outer gear 26 are respectively meshed with the upper and lower racks 132, and the inner gear 23 and the outer gear 26 are only meshed with one of the gears. In order to reduce the radial space occupation, the meshing position can be staggered in the length direction of the lock tongue body 13. For the specific structure, please refer to Figure 2 and Figure 4 In this embodiment, both the externally opening gear 26 and the internally opening gear 23 are semi-toothed gear columns, which are sector-shaped columns with curved teeth. This further compresses the interior space of the lock bolt body 13. Therefore, turning either the internal handle 21 or the external handle 24 rotates the corresponding semi-toothed gear column. Through the cooperation of the semi-toothed gear column and the rack 132, the lock bolt body 13 can be moved, retracted into the lock housing 11, and disengaged from the lock seat 3 on the container, thereby opening the door.

[0025] A spring 14 and a spring stopper 15 are also provided between the two sets of racks 132. One side of the spring stopper 15 is fixed to the lock housing 11 by bolting or welding. The two ends of the spring 14 abut against the spring stopper 15 and the lock tongue 131, respectively, so that the setting direction of the spring 14 is consistent with the length direction of the lock tongue body 13. The spring 14 is always in a compressed state, or at least in a compressed state when opening the door inside or outside. Therefore, after releasing the handle, the lock tongue body 13 is automatically reset by the spring 14, that is, the lock tongue 131 extends out of the lock housing 11. Figure 4 Based on this elastic mechanism, the rack 132 of the lock tongue body 13 has a corresponding force on the inner gear 23 and the outer gear 26. The staff needs to overcome the tightening force of the spring 14 before they can rotate the inner handle 21 and the outer handle 24.

[0026] In summary, the present invention adopts a rotating internal handle 21, which changes the unlocking operation from pushing to twisting, avoiding the problem of the handle groove 41 in the PVC bowl-shaped profile 4 being too deep due to the push-in structure. Compared with the existing solution, the thickness of the bubble 52 at the lock body 1 is increased, the thermal insulation performance is enhanced, and the internal power loss is reduced; at the same time, it eliminates the safety problem of the door being opened due to irregular small and micro cargo falling and hitting the push-in structure, and improves the stability of the internal handle 21.

[0027] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A container thermal insulation door lock structure, wherein the thermal insulation door (5) comprises an inner plate (53) and an outer plate (51), characterized in that: The door lock structure comprises a PVC bowl-shaped profile (4) and a lock body (1), wherein the PVC bowl-shaped profile (4) is arranged through the thermal insulation door (5), and the outer edge of the opening of the PVC bowl-shaped profile (4) is fixed to the side of the inner plate (53) facing the inner space of the box; the lock body (1) comprises an internal handle (21), a screw (22), an internal gear (23) and a lock tongue body (13), wherein the internal handle (21) and the screw (22) are both arranged on the P Inside the VC bowl-shaped profile (4), the inner gear (23) and the lock tongue body (13) are both arranged on the outside of the box; the screw (22) is rotatably connected to the PVC bowl-shaped profile (4), and the two ends of the screw (22) are fixedly connected to the inner handle (21) and the inner gear (23), respectively. The inner gear (23) is engaged with the lock tongue body (13), and the inner handle (21) is rotated to move the lock tongue body (13) to realize the inner opening of the door.

2. The door lock structure according to claim 1, characterized in that: The lock body (1) further comprises an external handle (24), a stud (25) and an external gear (26) arranged on the outside of the box body, and the two ends of the stud (25) are fixedly connected to the external handle (24) and the external gear (26) respectively; the lock tongue body (13) has two sets of upper and lower symmetrical racks (132), and the two sets of racks (132) are respectively engaged with the internal gear (23) and the external gear (26), and the engaging positions are staggered in the length direction of the lock tongue body (13).

3. The door lock structure according to claim 2, characterized in that: The externally opened gear (26) and the internally opened gear (23) are both half-toothed gear columns, and the half-toothed gear columns are sector-shaped columns with teeth on an arc surface.

4. The door lock structure according to claim 2, characterized in that: The lock body (1) further comprises a lock shell (11) and a lock shell cover (12), wherein the lock shell cover (12) is fixed to the outer plate (51), and the lock shell cover (12) is detachably connected to the lock shell (11); the lock tongue body (13) is slidably arranged inside the lock shell (11), and the lock tongue (131) of the lock tongue body (13) is located at the same end of the two sets of racks (132), and the lock shell (11) is provided with a lock opening (111) for the lock tongue (131) to be extended and retracted; the stud (25) passes through the lock shell (11) and is rotatably connected to the lock shell (11), and the outer gear (26) is rotatably connected to the lock shell cover (12); the screw (22) passes through the lock shell cover (12), and the inner gear (23) is rotatably connected to the lock shell (11).

5. The door lock structure according to claim 4, characterized in that: A spring (14) and a spring stopper (15) are provided between the two groups of racks (132), the spring stopper (15) being fixed to the lock housing (11), and two ends of the spring (14) respectively abutting against the spring stopper (15) and the lock tongue (131).

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