Door locking device

Abstract

The invention provides a door locking device which can be conveniently used by a user. The door locking device (7) is arranged at one side and the other side (left and right side doors 4L and 4R) of a door opened to the left and right sides, is a device for locking and unlocking the one side and the other side of the door, and is provided with an operation rod (21), an insertion part (a left side U-shaped metal fitting 13L) and a falling-off prevention device (a right side U-shaped metal fitting 13R and a rod side clamping part 30), and the operation rod (21), the insertion part (the left side U-shaped metal fitting 13L) and the falling-off prevention device (the right side U-shaped metal fitting 13R and the rod side clamping part 30) are arranged on the left side and the right side of the door. An operating lever (21) which is provided on the door on one side (door on the left side (4L)), is rotatable about the vertical direction of the door surface of the door on one side, and is movable in parallel in the vertical and horizontal directions toward the door surface of the door on one side; an insertion part (a left U-shaped metal fitting 13L) is arranged on the other door (a right door 4R), the rod-side protrusion (28) is inserted into the insertion part in a state of being capable of parallel movement in the up-down direction and the left-right direction towards the door surface of the other door, and the insertion part prevents the inserted rod-side protrusion (28) from moving in the left-right opening direction; in a state in which the lever-side protrusion (28) is inserted into the insertion section and the operation lever (21) moves downward toward the door surface of the door on the one side, the fall-off prevention device prevents the lever-side protrusion (28) from falling off from the insertion section.

Description

Technical Field

[0001] This invention relates to a locking device for the doors of locked box-type truck containers, independently constructed containers, etc. Background Technology

[0002] On containers that form the loading platform of a box-shaped truck (van body), doors that can be freely opened and closed by hinges, such as doors that open to the left and right, are widely used. In addition, as a locking device for a door that can be freely opened and closed by hinges, a device that has a locking bar that is rotatably mounted on the door and locks / unlocks the door by changing the rotation phase around an axis has been used (for example, see Japanese Patent Document 1).

[0003] Furthermore, as a locking device, in order to further ensure the locking of the door, in addition to locking devices with locking bars, box trucks with latch-type locking devices are also very common.

[0004] A traditional latch-type locking device consists of a latch that is rotatably mounted on one side of a door that opens to the left and right, and a hook that is mounted on the other side of a door that opens to the left and right and engages with the latch.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2000-129980 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] In the conventional latch-type locking device described above, in order to prevent accidental unlocking due to the vibration of the box truck, the latch and hook need to be engaged tightly, the rotating part needs to be engaged tightly, and a lot of force is required to lock and unlock the door.

[0010] The present invention addresses the problems described above in conventional technology by providing a door locking device that is convenient for users.

[0011] Methods for solving problems

[0012] The door locking device of the present invention is provided at one side and the other side of a door that opens to the left and right, and is a device for locking and unlocking the door on one side and the other side. Its features include: an operating lever, an insertion part, and an anti-dislodgement device. The operating lever has a lever-side protrusion and a lever-side operating part, and is located on the door on one side, rotatable about the vertical direction of the door surface of that side, and can move parallel to the door surface of that side in the vertical and horizontal directions. The insertion part is located on the door on the other side, and the lever-side protrusion is inserted into the insertion part in a state where it can move parallel to the door surface of that side in the vertical and horizontal directions. The insertion part prevents the inserted lever-side protrusion from moving in the left and right directions. When the lever-side protrusion is inserted into the insertion part, and the operating lever moves downward toward the door surface of that side, the anti-dislodgement device prevents the lever-side protrusion from dislodging from the insertion part.

[0013] Furthermore, the door locking device of the present invention is provided on one side and the other side of a door that opens to the left and right, and is a door locking device for locking and unlocking the door on one side and the other side, characterized in that:

[0014] It has an operating lever, an insertion part, and a door-side locking part.

[0015] The operating lever has a lever-side protrusion, a lever-side locking part, and a lever-side operating part. It is located on the door on one side and can rotate about the vertical direction of the door surface on the one side, and can move parallel to the door surface on the one side in the up-down and left-right directions.

[0016] The insertion part is located on the other side of the door. The rod-side protrusion is inserted into the insertion part in a state where it can move parallel to the door surface of the other side of the door in the up-down and left-right directions. The insertion part prevents the inserted rod-side protrusion from moving in the left-right opening direction.

[0017] The door-side locking part is provided on one side of the door. When the rod-side protrusion is inserted into the insertion part, and the operating rod moves downward toward the door surface of the door on the one side, it is locked by the rod-side locking part when the operating rod rotates toward the other side of the door, thus preventing the rod-side protrusion from falling out of the insertion part.

[0018] Furthermore, the door locking device of the present invention is characterized in that the door locking device of the present invention is provided on one side and the other side of the door of the container of the loading platform of the box-shaped truck.

[0019] Invention Effects

[0020] This invention provides a door locking device that is convenient for users to use. Attached Figure Description

[0021] Figure 1 This is a rear view of a box-type truck equipped with the door locking device according to an embodiment of the present invention.

[0022] Figure 2 This is an enlarged rear view of the door locking device and its surrounding area in the locked state according to an embodiment of the present invention.

[0023] Figure 3 This is an enlarged rear view of the door locking device in the unlocked state and its surrounding area, according to an embodiment of the present invention.

[0024] Figure 4 This is an enlarged perspective view of a part of the door locking device according to an embodiment of the present invention.

[0025] Figure 5 This is an enlarged cross-sectional view of the U-shaped metal fitting and its surrounding area involved in the embodiment of the present invention.

[0026] Figure 6 This is an enlarged rear view of a door locking device in a locked state and its surrounding area, according to a modified embodiment of the present invention.

[0027] Figure 7 This is an enlarged rear view of the door locking device in the unlocked state and its surrounding area, according to a modified embodiment of the present invention. Detailed Implementation

[0028] <Implementation Form>

[0029] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0030] Figure 1 This is a rear view of a box-type truck equipped with the door locking device according to an embodiment of the present invention.

[0031] Figure 2 This is an enlarged rear view of the door locking device and its surrounding area in the locked state according to an embodiment of the present invention.

[0032] Figure 3 This is an enlarged rear view of the door locking device in the unlocked state and its surrounding area, according to an embodiment of the present invention.

[0033] Figure 4 This is an enlarged perspective view of a part of the door locking device according to an embodiment of the present invention.

[0034] Figure 5 This is an enlarged cross-sectional view of the U-shaped metal fitting and its surrounding area involved in the embodiment of the present invention.

[0035] <Structure of Embodiments of the Invention>

[0036] like Figure 1 As shown, symbol 1 indicates a box-type truck (van body) that uses the door locking device according to the embodiment of the present invention.

[0037] A container 3, which forms a loading platform, is mounted on the upper side of the rear chassis 2 of truck 1.

[0038] The left and right side doors 4L and 4R, which open to the left and right, are installed at the rear of container 3 via the left and right side flaps 5L and 5R, which open and close freely.

[0039] The left and right doors 4L and 4R are equipped with conventional lock bar type door locking devices 6L and 6R and the latch type door locking device 7 according to the embodiment of the present invention.

[0040] The door locking devices 6L and 6R on the left and right sides are respectively located at the lower part of the doors 4L and 4R on the left and right sides. Each has a locking rod 6La and 6Ra that locks / unlocks the doors 4L and 4R on the left and right sides by changing the rotation phase around the axis, and a rod 6Lb and 6Rb that rotates the locking rods 6La and 6Rb.

[0041] The door locking device 7 is provided on the longitudinal frame portions 8L and 8R of the left and right doors 4L and 4R that are in contact with each other.

[0042] like Figure 2 As shown, the door locking device 7 consists of a pin 11R, U-shaped metal fittings 12L and 12R on the left and right sides, U-shaped metal fittings 13L and 13R on the left and right sides, and an operating lever 21.

[0043] The left and right frame portions 8L and 8R pass through the segment 41 (see reference). Figure 4 It is formed by protruding from the middle part 4La, 4Ra of the left and right doors 4L, 4R to the rear side of the vehicle body.

[0044] like Figures 2 to 4 As shown, on the left side frame 8L, the left side ko-shaped metal fitting 12L and the left side ko-shaped metal fitting 13L are fixed sequentially from the top by welding.

[0045] On the right side of the frame 8R, pin 11R, right side コ-shaped metal fitting 12R, and right side コ-shaped metal fitting 13R are fixed by welding.

[0046] like Figure 2 and Figure 3 As shown, pin 11R holds the operating lever 21 in a state where the door facing one side can move parallel in the vertical and horizontal directions, as shown. Figure 4 As shown, shaft 11Ra is fixed to the upper side of the middle part of the frame 8R on the right side by welding.

[0047] like Figure 2 and Figure 3 As shown, when the doors 4L and 4R on the left and right sides are closed, the distance between the ko-shaped metal fittings 12L and 12R on the left and right sides is shorter than the distance between the ko-shaped metal fittings 13L and 13R on the left and right sides.

[0048] The operating lever 21 is formed from a metal plate and has, in sequence from top to bottom, a straight section 22, a tilted section 23 that tilts to the right, a straight section 24, and a lever-side operating section 25.

[0049] An insertion hole 26 is formed on the upper part of the operating lever 21 for inserting the shaft 11Ra with the pin 11R.

[0050] like Figure 4 As shown, when the shaft 11Ra of pin 11R is inserted into the insertion hole 26, the upper part of the operating lever 21 is clamped between the pin head 11Rb of pin 11R and the frame portion 8R on the right side.

[0051] In order to enable the door face of the operating lever 21 facing the right side of the door 4R to move parallel in the vertical and horizontal directions, the insertion hole 26 is formed to be larger than the shaft 11Ra and wider at the bottom than at the top.

[0052] like Figure 2 and Figure 3 As shown, a rod-side protrusion 27 extending to the left is formed on the left side of the straight section 22. The rod-side protrusion 27 can be inserted into and detached from the U-shaped metal fittings 12L and 12R on the left and right sides.

[0053] A rod-side protrusion 28 extending to the left is formed on the left side of the straight section 24. The rod-side protrusion 28 can be inserted into and detached from the U-shaped metal fittings 13L and 13R on the left and right sides.

[0054] The rod-side protrusion 28 is composed of a straight section 29 extending to the left and a rod-side locking section 30 extending downward from the straight section 29.

[0055] The lever-side locking portion 30 has a locking piece 31 extending from the lower left to the left. In the locked state, the locking piece 31 locks the left-side U-shaped metal fitting 13L to prevent the operating lever 21 from moving upwards. Between the locking piece 31 on the left side of the lever-side locking portion 30 and the straight portion 29, there is an inclined portion 32 that slopes to the right. The right side of the lever-side locking portion 30 has an inclined portion 33 that slopes to the left.

[0056] The tip side 34 of the straight section 29 can be inserted into the left-side U-shaped metal fitting 13L. By inserting the left-side U-shaped metal fitting 13L into the tip side 34 and the left-side U-shaped metal fitting 12L into the rod side protrusion 27, the door locking device 7 locks the left and right doors 4L and 4R.

[0057] like Figure 5 As shown, the U-shaped metal fitting 13L on the left is formed from bent iron, stainless steel, etc., and has horizontal faces 42 and 43 on the upper and lower sides of the vertical face 41. The front ends of the horizontal faces 42 and 43 are connected and fixed to the frame 8L by welding 44 and 45.

[0058] Figure 4 The ko-shaped metal fittings 12L and 12R on the left and right sides, and the ko-shaped metal fitting 13R on the right side, shown also have the same structure as the ko-shaped metal fitting 13L on the left side.

[0059] <Operation Method of Door Locking Device 7>

[0060] First, let me explain how to switch the left and right doors 4L and 4R from the unlocked state to the locked state.

[0061] like Figure 3 As shown, when the door locking device 7 is in the unlocked state, the operating lever 21 is in the position of rotating to the right, the lever side protrusion 27 is in the state of being inserted into the right-side ko-shaped metal fitting 12R, and in the state of being pulled out from the left-side ko-shaped metal fitting 12L.

[0062] The lever-side protrusion 28 is inserted into the right-side U-shaped metal fitting 13R and pulled out from the left-side U-shaped metal fitting 13L. The lower horizontal portion of the right-side U-shaped metal fitting 13R is inserted between the locking piece 31 and the tip side 34 of the lever-side locking portion 30, and the lower horizontal portion of the right-side U-shaped metal fitting 13R is locked against the inclined portion 32 of the lever-side locking portion 30. Through the locking of the lever-side locking portion 30, the operating lever 21 stops at... Figure 3 The state shown.

[0063] When the door locking device 7 changes from the unlocked state to the locked state, the user grabs the lever-side operating part 25 and pulls it to the right, causing the operating lever 21 to rotate further to the right. The tilting part 32 and the locking piece 31 move away from the horizontal surface under the right-side U-shaped metal fitting 13R, releasing the lever-side locking part 30 from locking the right-side U-shaped metal fitting 13R.

[0064] Then, by pushing the lever-side operating part 25 upward, the user makes the lever-side locking part 30 of the operating lever 21 so that it can be inserted into the inside of the right-side U-shaped metal fitting 13R. By pushing the lever-side operating part 25 to the left, the user makes the lever-side locking part 30 insert into the inside of the right-side U-shaped metal fitting 13R, the tip of the lever-side protrusion 27 inserts into the left-side U-shaped metal fitting 12L, and the tip of the lever-side protrusion 28 34 inserts into the left-side U-shaped metal fitting 13L.

[0065] Then, by pressing down the lever-side operating part 25, the user moves the lever-side locking part 30 of the operating lever 21 downward from between the horizontal surfaces of the lower sides of the ko-shaped metal fittings 13L and 13R on the left and right sides.

[0066] Then, by pushing the lever-side operating part 25 to the left, the user inserts the lower horizontal part of the left-side U-shaped metal fitting 13L into the space between the locking piece 31 and the tip side 34 of the lever-side locking part 30. The locking piece 31 of the lever-side locking part 30 is then locked from below to the lower horizontal part of the left-side U-shaped metal fitting 13L. Thus, the door locking device 7 becomes as follows: Figure 2 In the locked state shown, the left and right doors 4L and 4R, which open to the left and right, are locked by the door locking device 7.

[0067] In this state, the locking piece 31 of the rod-side locking part 30 locks against the horizontal surface of the lower side of the left-side ko-shaped metal fitting 13L, preventing the rod-side locking part 30 from moving above the horizontal surface of the lower side of the left and right ko-shaped metal fittings 13L and 13R, thus making the locking by the door locking device 7 secure.

[0068] Furthermore, when the tip 34 of the rod-side protrusion 28 is inserted into the left-side U-shaped metal fitting 13L, and the operating lever 21 is moving downward toward the door surface of the left-side door 4L, when the operating lever 21 rotates toward the left-side door 4L, the tilting part 33 of the rod-side locking part 30, which tilts to the left, locks against the right-side U-shaped metal fitting 13R, stopping the rotation of the operating lever 21 toward the left-side door 4L. The tilting part 33 also guides the operating lever 21 downward, preventing the tip 34 of the rod-side protrusion 28 from falling off the left-side U-shaped metal fitting 13L, thus ensuring that the locking by the door locking device 7 is secure.

[0069] After being locked by the door locking device 7, operate the door locking devices 6L and 6R on the left and right sides to double lock the doors 4L and 4R on the left and right sides.

[0070] When the doors 4L and 4R on the left and right sides are switched from the locked state to the unlocked state, the operation is the opposite of the operation when switching from the unlocked state to the locked state.

[0071] <Summary of the Structure and Effects of the Embodiments of the Invention>

[0072] The following summarizes the structure and effects of this embodiment of the present invention. The door locking device 7 is provided at one side and the other side of a door that opens to the left and right (doors 4L and 4R on the left and right sides). It is a device for locking and unlocking the doors on these two sides. It includes an operating lever 21, an insertion part (the U-shaped metal fitting 13L on the left side), and an anti-fall-off device (the U-shaped metal fitting 13R on the right side and a lever-side locking part 30). The operating lever 21 has a lever-side protrusion 28 and a lever-side operating part 25. It is located at the door on one side (door 4R on the right side) and can rotate about the vertical direction of the door surface on that side, and can move vertically and horizontally towards the door surface on that side. The direction can be moved parallel; the insertion part (the ko-shaped metal fitting 13L on the left) is provided on the door (the door 4L on the left) on the other side, and the rod-side protrusion 28 is inserted into the insertion part in a state in which it can move parallel in the up and down and left and right directions toward the door surface of the other side. The insertion part prevents the inserted rod-side protrusion 28 from moving in the direction of opening to the left and right. When the rod-side protrusion 28 is inserted into the insertion part, and the operating lever 21 moves downward toward the door surface of the door on one side, the anti-dislodgement device prevents the rod-side protrusion 28 from falling out of the insertion part.

[0073] Furthermore, the door locking device 7 is located on one side and the other side of the doors that open to the left and right (doors 4L and 4R on the left and right sides). It is a door locking device for locking and unlocking the doors on one side and the other side. It has an operating lever 21, an insertion part (the U-shaped metal fitting 13L on the left side), and a door-side locking part (the U-shaped metal fitting 13R on the right side). The operating lever 21 has a lever-side protrusion 28, a lever-side locking part 30, and a lever-side operating part 25. It is located on the door on one side (door 4R on the right side) and can rotate about the vertical direction of the door surface on that side. It can also move parallel to the door surface on that side in the up-down and left-right directions. The insertion part (the U-shaped metal fitting 13L on the left side) is located on the door on the right side. L) On the other side of the door (left door 4L), the rod-side protrusion 28 is inserted into the insertion part in a state where it can move parallel to the door surface of the other side in the up-down and left-right directions. The insertion part prevents the inserted rod-side protrusion 28 from moving in the direction of opening to the left and right. The door-side locking part (right-side U-shaped metal fitting 13R) is provided on the door on one side. When the rod-side protrusion 28 is inserted into the insertion part and the operating rod 21 moves downward toward the door surface of the one side of the door, it is locked by the rod-side locking part 30 when the operating rod rotates toward the door side of the other side, preventing the rod-side protrusion 28 from falling out of the insertion part.

[0074] Door locking device 7 is installed on one side of the door of the container 3 that opens to the left and right on the loading platform of the box-shaped truck 1, and on the other side of the door (doors 4L and 4R on the left and right sides).

[0075] According to this embodiment, in the locked state, by using the anti-dislodgement device (the right-side ko-shaped metal fitting 13R and the rod-side locking part 30), the rod-side protrusion 28 is inserted into the insertion part (the left-side ko-shaped metal fitting 13L), and the operating lever 21 moves downward toward the door surface of the door on that side (the left-side door 4L), preventing the rod-side protrusion 28 from dislodging from the insertion part. Therefore, the engagement and locking of the door locking device 7 and the engagement of the rotating part do not need to be too tight, and locking and unlocking the door does not require much force, making smooth operation possible and convenient for user use.

[0076] <Construction of variations of the embodiments of the present invention>

[0077] Figure 6 This is an enlarged rear view of a door locking device in a locked state and its surrounding area, according to a modified embodiment of the present invention.

[0078] Figure 7 This is an enlarged rear view of the door locking device in the unlocked state and its surrounding area, according to a modified embodiment of the present invention.

[0079] like Figure 6 and Figure 7 As shown, in a modified embodiment of the present invention, door locking devices 7R and 7L are provided on the frame portions 8L and 8R of the doors 4L and 4R on the left and right sides.

[0080] Door locking device 7R has the same as Figures 1 to 5 The door locking device 7 shown has the same structure.

[0081] Therefore, as Figure 6 and Figure 7 As shown, the door locking device 7R includes a pin 11R, U-shaped metal fittings 12L and 12R on the left and right sides, U-shaped metal fittings 13L and 13R on the left and right sides, an operating lever 21R, a straight section 22R, an inclined section 23R, a straight section 24R, a lever-side operating section 25R, an insertion hole 26R, a lever-side protrusion 27R, a lever-side protrusion 28R, a straight section 29R, a lever-side locking section 30R, a locking piece 31R, an inclined section 32R, an inclined section 33R, and a tip-side section 34R. Figures 1 to 5 The door locking device 7 shown has the same structure as the pin 11R, the U-shaped metal fittings 12L and 12R on the left and right sides, the U-shaped metal fittings 13L and 13R on the left and right sides, the operating lever 21, the straight part 22, the inclined part 23, the straight part 24, the lever-side operating part 25, the insertion hole 26, the lever-side protrusion 27, the lever-side protrusion 28, the straight part 29, the lever-side locking part 30, the locking piece 31, the inclined part 32, the inclined part 33, and the tip side part 34.

[0082] like Figure 6and Figure 7 As shown, the straight section 22L of the door locking device 7L is longer than the straight section 22R. Instead of the left and right ko-shaped metal fittings 12L, 12R, and the left and right ko-shaped metal fittings 13L, 13R, it has left and right ko-shaped metal fittings 14L, 14R and left and right ko-shaped metal fittings 15L, 15R. Otherwise, it has a structure that is almost identical to the left and right symmetrical structure of the door locking device 7R.

[0083] Therefore, the pin 11L, operating lever 21L, straight section 22L, inclined section 23L, straight section 24L, lever-side operating section 25L, insertion hole 26L, lever-side protrusion 27L, lever-side protrusion 28L, straight section 29L, lever-side locking section 30L, locking piece 31L, inclined section 32L, inclined section 33L, and the tip side 34L of the straight section 29L of the door locking device 7R have a structure that is almost identical to the left-right symmetrical structure of the pin 11R, operating lever 21R, straight section 22R, inclined section 23R, straight section 24R, lever-side operating section 25R, insertion hole 26R, lever-side protrusion 27R, lever-side protrusion 28R, straight section 29R, lever-side locking section 30R, locking piece 31R, inclined section 32R, inclined section 33R, and the tip side 34R of the straight section 29R of the door locking device 7R.

[0084] Starting from the top, the left frame 8L is fixed with pins 11L, the left ko-shaped metal fitting 12L, the left ko-shaped metal fitting 14L, the left ko-shaped metal fitting 13L, and the left ko-shaped metal fitting 15L by welding.

[0085] Pin 11R, right-side ko-shaped metal fitting 12R, right-side ko-shaped metal fitting 14R, right-side ko-shaped metal fitting 13R, and right-side ko-shaped metal fitting 15R are fixed to the right-side frame 8R by welding.

[0086] Door locking device 7R performs a process of... Figures 1 to 5 The door locking device 7 shown operates in the same way, allowing for locking and unlocking.

[0087] The door locking device 7L is engaged with... Figures 1 to 5 The door locking device 7 shown can be locked and unlocked by operating in opposite directions.

[0088] Based on such a variation, we can obtain the same as Figures 1 to 5 The door locking device 7 shown has the same effect, and by adding a door locking device 7L to the door locking device 7R which is the same as the door locking device 7, the locking of the doors 4L and 4R on the left and right sides can be more certain.

[0089] exist Figures 1 to 7In the description, the door locking device of this embodiment and its variations is applied to the door of a container on a loading platform of a box-shaped truck (cargo truck body), and can also be applied to other doors, such as the door of a single sea container (other containers (e.g., railway, trailer, etc.)), the door of a ship, etc.

[0090] and, Figure 6 and Figure 7 The door locking device 7L on the left side of the modified example shown can be installed separately.

[0091] Furthermore, in Figures 1 to 7 In the embodiments and variations of the present invention described herein, the size and material of the door locking devices 7, 7L, and 7R can be changed in various ways.

[0092] In this way, the structure of the present invention, the connection of each component, etc., can be modified in various ways without changing the spirit of the present invention.

[0093] The materials can also be freely selected, including metal, plastic, fiber-reinforced plastic (FRP), wood, etc.

[0094] For example, two or more components can be combined into one, or conversely, two or more other components can be combined and connected into one component.

[0095] Furthermore, the above-mentioned implementation forms and variations are only the best forms and two forms that are close to them.

[0096] Label Explanation

[0097] 1: Truck; 2: Rear chassis; 3: Container; 4L, 4R: Left and right side doors; 5L, 5R: Left and right side flaps; 6L, 6R: Left and right side door locking devices; 6La, 6Ra: Locking rods; 6Lb, 6Rb: Rods; 7, 7L, 7R: Door locking devices; 8L, 8R: Frame; 11R: Pin; 12L, 12R, 13L, 13R, 14L, 14R, 15L, 15R: U-shaped metal fittings; 21, 21L, 21R: Operating levers; 22, 22L, 22R: Straight sections; 23 23L, 23R: Inclined section; 24, 24L, 24R: Straight section; 25, 25L, 25R: Rod-side operating section; 26, 26L, 26R: Insertion hole; 27, 27L, 27R; 28, 28L, 28R: Rod-side protrusion; 29, 29L, 29R: Straight section; 30, 30L, 30R: Rod-side locking section; 31, 31L, 31R: Locking piece; 32, 32L, 32R: Inclined section; 33, 33L, 33R: Inclined section; 34, 34L, 34R: Tip side section.

Claims

1. A door locking device provided at one side and the other side of doors which open to the left and right, and which locks and unlocks the one side and the other side of doors, characterized by: an operating lever, an insertion portion, and a fall prevention device, the operating lever having a lever-side protruding portion and a lever-side operating portion, and being provided at the one side of the doors, and being rotatable about the vertical direction of the door surface of the one side of the doors, and being parallelly movable in the upward and downward and left and right directions toward the door surface of the one side of the doors, the insertion portion being provided at the other side of the doors, the lever-side protruding portion being inserted into the insertion portion in a state of being parallelly movable in the upward and downward and left and right directions toward the door surface of the other side of the doors, the insertion portion preventing the inserted lever-side protruding portion from moving in the direction of opening to the left and right, the fall prevention device preventing the lever-side protruding portion from falling from the insertion portion in a state in which the lever-side protruding portion is inserted into the insertion portion, and the operating lever is moved downward toward the door surface of the one side of the doors.

2. A door locking device provided at one side and the other side of doors which open to the left and right, and which locks and unlocks the one side and the other side of doors, characterized by: an operating lever, an insertion portion, and a door-side locking portion, the operating lever having a lever-side protruding portion, a lever-side locking portion, and a lever-side operating portion, and being provided at the one side of the doors, and being rotatable about the vertical direction of the door surface of the one side of the doors, and being parallelly movable in the upward and downward and left and right directions toward the door surface of the one side of the doors, the insertion portion being provided at the other side of the doors, the lever-side protruding portion being inserted into the insertion portion in a state of being parallelly movable in the upward and downward and left and right directions toward the door surface of the other side of the doors, the insertion portion preventing the inserted lever-side protruding portion from moving in the direction of opening to the left and right, the door-side locking portion being provided at the one side of the doors, and preventing the lever-side protruding portion from falling from the insertion portion by locking with the lever-side locking portion when the operating lever is rotated toward the other side of the doors in a state in which the lever-side protruding portion is inserted into the insertion portion, and the operating lever is moved downward toward the door surface of the one side of the doors.

3. The door locking device according to claim 1 or 2, characterized in that: the door locking device is provided at one side and the other side of doors of a container which constitutes a loading platform of a truck of a box type. ​ ​ ​ ​ ​ ​ ​ ​ ​

Images