Door lock device

Abstract

Provided is a door lock device capable of achieving convenience for a user.　This door lock device 7 is provided to one door and another door (left and right doors 4L, 4R) that open in the manner of double doors, and locks and unlocks the one door and the other door. The door lock device comprises: an operation lever 21 which is provided to the one door (right door 4R), can rotate using a direction perpendicular to the surface of the one door as an axis, and can translate in the up-down and left-right directions over the surface of the one door; an insertion part (left U-shaped metal fitting 13L) which is provided to the other door (left door 4L), receives the insertion of a lever-side protruding portion 28 in a state in which the lever-side protruding portion 28 can translate in the up-down and left-right directions over the surface of the other door, and stops the movement of the inserted lever-side protruding portion 28 in the direction in which the doors open; and a slip prevention means (right U-shaped metal fitting 13R and lever-side catch portion 30) which prevents the lever-side protruding portion 28 from slipping out of the insertion part in a state in which the lever-side protruding portion 28 is inserted into the insertion part and the operation lever 21 is moved downward over the surface of the one door.

Description

Door locking device

[0001] The present invention relates to a door locking device for locking the door of a box-shaped truck container, a standalone container, or the like.

[0002] Containers that form the bed of box-shaped trucks (van bodies) and the like widely use doors attached to the rear or side of the containers, such as double-door doors, that are hinged to open and close freely. A locking device for a door that is hinged to open and close freely includes a lock rod that is rotatably attached to the door and that locks and unlocks the door by changing the rotation phase around an axis (see, for example, Patent Document 1).

[0003] In addition to locking devices with locking rods, box-shaped trucks equipped with bolt-type locking devices are also becoming popular to ensure that doors are locked more securely.

[0004] A conventional latch-type locking device comprises a latch rotatably mounted on one door of a double door set, and a hook portion mounted on the other door set, which fits and engages with the latch.

[0005] Japanese Patent Application Laid-Open No. 2000-129980

[0006] In the conventional latch-type locking device described above, the latch and hook portion had to be tightly fitted and locked, and the rotating portion had to be tightly joined, in order to prevent unintentional unlocking due to the vibration of the box-shaped truck, which required a strong force to lock and unlock the door.

[0007] SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and has as its object to provide a door lock device that is convenient for users.

[0008] The door locking device of the present invention is a door locking device that is provided on one and the other doors that open like a double door and locks and unlocks the one and the other doors, and is characterized by comprising: an operating lever that has a lever-side protrusion and a lever-side operating part, is provided on the one door, is rotatable about an axis that is perpendicular to the door surface of the one door, and is movable in parallel up and down and left and right toward the door surface of the one door; an insertion part that is provided on the other door, and into which the lever-side protrusion is inserted in a state that allows it to move in parallel up and down and left and right toward the door surface of the other door, and stops the movement of the inserted lever-side protrusion in the double-opening direction; and a removal prevention means that prevents the lever-side protrusion from removing from the insertion part when the lever-side protrusion is inserted into the insertion part and the operating lever is moved downward toward the door surface of the one door.

[0009] Furthermore, the door locking device of the present invention is a door locking device that is provided on one and the other doors that open like a double door and locks and unlocks the one and the other doors, and is characterized by comprising: an operating lever that is provided on the one door and is rotatable about an axis perpendicular to the door surface of the one door and is movable in parallel up and down and left and right toward the door surface of the one door; an insertion section that is provided on the other door and into which the lever-side protrusion is inserted in a state in which it can move in parallel up and down and left and right toward the door surface of the other door, and that stops the movement of the inserted lever-side protrusion in the double door opening direction; and a door-side locking section that is provided on the one door and that engages with the lever-side locking section when the operating lever rotates toward the other door while the lever-side protrusion is inserted into the insertion section and moved downward toward the door surface of the one door, thereby preventing the lever-side protrusion from coming out of the insertion section.

[0010] Furthermore, the door locking device of the present invention is characterized in that it is provided on one and the other doors of a container that constitutes the loading platform of a box-shaped truck, the doors opening like double doors.

[0011] The present invention can provide a door lock device that is convenient for users.

[0012] FIG. 1 is a rear view of a box-shaped truck using a door locking device according to an embodiment of the present invention; FIG. 2 is a rear view showing an enlarged view of the door locking device in a locked state according to an embodiment of the present invention and its surroundings; FIG. 3 is a rear view showing an enlarged view of the door locking device in an unlocked state according to an embodiment of the present invention and its surroundings; FIG. 4 is a perspective view showing an enlarged view of a part of the door locking device according to an embodiment of the present invention; FIG. 5 is a cross-sectional view showing an enlarged view of a U-shaped metal fitting and its surroundings according to an embodiment of the present invention; FIG. 6 is a rear view showing an enlarged view of the door locking device in a locked state according to a modified embodiment of the present invention and its surroundings; FIG. 7 is a rear view showing an enlarged view of the door locking device in an unlocked state according to a modified embodiment of the present invention and its surroundings.

[0013] <Embodiments> Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0014] Fig. 1 is a rear view of a box-shaped truck using a door locking device according to an embodiment of the present invention. Fig. 2 is a rear view of the door locking device according to an embodiment of the present invention in a locked state and its surroundings in an enlarged scale. Fig. 3 is a rear view of the door locking device according to an embodiment of the present invention in an unlocked state and its surroundings in an enlarged scale. Fig. 4 is a perspective view of a portion of the door locking device according to an embodiment of the present invention. Fig. 5 is a cross-sectional view of the U-shaped metal fitting and its surroundings in an enlarged scale according to an embodiment of the present invention.

[0015] <Configuration of an embodiment of the present invention> As shown in FIG. 1, reference numeral 1 denotes a box-shaped truck (van body) in which a door lock device according to an embodiment of the present invention is used.

[0016] A container 3 forming a loading platform is attached to the upper side of a rear chassis 2 of the truck 1.

[0017] Left and right doors 4L, 4R are attached to the rear of the container 3 so as to be openable and closable by left and right hinges 5L, 5R.

[0018] The left and right doors 4L, 4R are provided with conventional lock rod type left and right door locking devices 6L, 6R and a latch type door locking device 7 according to the embodiment of the present invention.

[0019] The left and right door locking devices 6L, 6R are provided at the bottom of the left and right doors 4L, 4R, respectively, and are equipped with lock rods 6La, 6Ra that lock and unlock the left and right doors 4L, 4R by changing the rotation phase around an axis, and levers 6Lb, 6Rb that are operated to rotate the lock rods 6La, 6Rb.

[0020] The door locking device 7 is provided on vertical frame portions 8L and 8R of the left and right doors 4L and 4R that contact each other.

[0021] As shown in FIG. 2, the door lock device 7 is composed of a pin 11R, left and right U-shaped metal fittings 12L and 12R, left and right U-shaped metal fittings 13L and 13R, and an operating lever 21.

[0022] The left and right frame portions 8L, 8R are formed to protrude from the intermediate portions 4La, 4Ra of the left and right doors 4L, 4R toward the rear of the vehicle body via step portions 41 (see FIG. 4).

[0023] As shown in FIGS. 2 to 4, a left U-shaped metal fitting 12L and a left U-shaped metal fitting 13L are fixed to the left frame portion 8L by welding, in that order from the top.

[0024] A pin 11R, a right U-shaped metal fitting 12R, and a right U-shaped metal fitting 13R are fixed to the right frame portion 8R by welding.

[0025] As shown in Figures 2 and 3, the pin 11R holds the operating lever 21 in a state in which it can move parallel to the door surface of one of the doors in the vertical and horizontal directions, and as shown in Figure 4, an axis 11Ra is fixed by welding to the upper middle part of the right frame part 8R.

[0026] As shown in Figures 2 and 3, when the left and right doors 4L, 4R are closed, the distance between the left and right U-shaped metal fittings 12L, 12R is shorter than the distance between the left and right U-shaped metal fittings 13L, 13R.

[0027] The operating lever 21 is formed from a single metal plate and has, from the top, a straight portion 22 , an inclined portion 23 inclined to the right, a straight portion 24 , and a lever-side operating portion 25 .

[0028] An insertion hole 26 is formed in the upper portion of the operating lever 21, into which the shaft 11Ra of the pin 11R is inserted.

[0029] As shown in FIG. 4, with the shaft 11Ra of the pin 11R inserted into the insertion hole 26, the upper part of the operating lever 21 is sandwiched between the pin head 11Rb of the pin 11R and the right frame portion 8R.

[0030] The insertion hole 26 is formed larger than the shaft 11Ra and is wider at the bottom than at the top so that the operating lever 21 can be moved in parallel up and down and left and right toward the door surface of the right door 4R.

[0031] 2 and 3, a lever-side protrusion 27 is formed extending leftward on the left side of the straight portion 22. The lever-side protrusion 27 is removably insertable into the left and right U-shaped metal fittings 12L, 12R.

[0032] A lever-side protrusion 28 is formed extending leftward on the left side of the straight portion 24. The lever-side protrusion 28 is removably insertable into the left and right U-shaped metal fittings 13L, 13R.

[0033] The lever-side protrusion 28 is formed by a straight portion 29 extending to the left side and a lever-side locking portion 30 extending downward from the straight portion 29 .

[0034] The lever-side locking portion 30 has a locking piece 31 extending leftward from the lower left. The locking piece 31 locks the left U-shaped metal fitting 13L when the door lock device 7 is locked, preventing the operating lever 21 from moving upward. Between the locking piece 31 on the left side of the lever-side locking portion 30 and the straight portion 29 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.

[0035] The tip side portion 34 of the straight portion 29 can be inserted into the left U-shaped metal fitting 13L. The door locking device 7 locks the left and right doors 4L, 4R by inserting the tip side portion 34 into the left U-shaped metal fitting 13L and inserting the lever-side protrusion 27 into the left U-shaped metal fitting 12L.

[0036] 5, the left U-shaped metal fitting 13L is formed by bending iron, stainless steel, or the like, and has horizontal surface portions 42, 43 above and below a vertical surface portion 41. The front ends of the horizontal surface portions 42, 43 are connected and fixed to the frame portion 8L by welding 44, 45.

[0037] The left and right U-shaped metal fittings 12L, 12R and the right U-shaped metal fitting 13R shown in FIG. 4 have the same structure as the left U-shaped metal fitting 13L.

[0038] <Method of Operating Door Locking Device 7> First, an operation for transitioning the left and right doors 4L, 4R from an unlocked state to a locked state will be described.

[0039] As shown in Figure 3, when the door locking device 7 is in the unlocked state, the operating lever 21 is rotated to the right, and the lever-side protrusion 27 is inserted into the right U-shaped metal fitting 12R, while the left U-shaped metal fitting 12L is pulled out.

[0040] The lever-side protrusion 28 is inserted into the right U-shaped metal fitting 13R and pulled out from the left U-shaped metal fitting 13L. The lower horizontal surface of the right U-shaped metal fitting 13R is inserted between the locking piece 31 and the tip side portion 34 of the lever-side locking portion 30, and the lower horizontal surface of the right U-shaped metal fitting 13R is locked with the inclined portion 32 of the lever-side locking portion 30. Locked by this lever-side locking portion 30, the operating lever 21 is stopped in the position shown in FIG. 3.

[0041] When the door locking device 7 is transitioned from an unlocked state to a locked state, the user grasps the lever side operating part 25 and pulls it to the right, thereby rotating the operating lever 21 further to the right and moving it away from the lower horizontal surface of the right U-shaped metal fitting 13R, the inclined part 32 and the locking piece 31, and releasing the lock of the right U-shaped metal fitting 13R by the lever side locking part 30.

[0042] After this, the user pushes the lever side operating part 25 upward to enable the lever side locking part 30 of the operating lever 21 to be inserted into the inside of the right U-shaped metal fitting 13R, and then the user pushes the lever side operating part 25 to the left to insert the lever side locking part 30 into the inside of the right U-shaped metal fitting 13R, insert the tip side of the lever side protrusion 27 into the left U-shaped metal fitting 12L, and insert the tip side part 34 of the lever side protrusion 28 into the left U-shaped metal fitting 13L.

[0043] Thereafter, the user pushes down the lever side operating portion 25 to move the lever side locking portion 30 of the operating lever 21 downward from between the lower horizontal surfaces of the left and right U-shaped metal fittings 13L, 13R.

[0044] Thereafter, the user pushes the lever-side operating unit 25 to the left, whereby the lower horizontal surface of the left U-shaped metal fitting 13L is inserted between the locking piece 31 of the lever-side locking part 30 and the tip side part 34, and the locking piece 31 of the lever-side locking part 30 is locked from below by the lower horizontal surface of the left U-shaped metal fitting 13L. As a result, the door locking device 7 enters the locked state shown in Figure 2, and the left and right double-door doors 4L, 4R are closed by the door locking device 7.

[0045] In this state, the engagement between the locking piece 31 of the lever side locking portion 30 and the lower horizontal surface of the left U-shaped metal fitting 13L prevents the lever side locking portion 30 from moving above the lower horizontal surface of the left and right U-shaped metal fittings 13L, 13R, thereby ensuring locking by the door locking device 7.

[0046] Furthermore, when the tip side portion 34 of the lever side protrusion 28 is inserted into the left U-shaped metal fitting 13L and the operating lever 21 has moved downward toward the door surface of the left door 4L, when the operating lever 21 rotates toward the left door 4L, the inclined portion 33 that slopes to the left of the lever side locking portion 30 engages with the right U-shaped metal fitting 13R, thereby stopping the rotation of the operating lever 21 toward the left door 4L, and the inclined portion 33 guides the operating lever 21 downward, preventing the tip side portion 34 of the lever side protrusion 28 from coming out of the left U-shaped metal fitting 13L, thereby ensuring reliable locking by the door locking device 7.

[0047] After the door lock device 7 has been locked, the left and right door lock devices 6L and 6R are operated to perform double locking on the left and right doors 4L and 4R.

[0048] When the left and right doors 4L and 4R are changed from a locked state to an unlocked state, the operation is reversed from that for changing from the unlocked state to the locked state.

[0049] <Summary of the configuration and operation of the embodiment of the present invention> The configuration and operation of the embodiment of the present invention will be summarized below. The door lock device 7 is a door lock device that is provided on one door and the other door (left and right doors 4L, 4R) that opens like a double door, and locks and unlocks the one and other doors. The door lock device 7 has a lever-side protrusion 28 and a lever-side operation part 25, is provided on one of the doors (right door 4R), is rotatable about an axis perpendicular to the door surface of the one door, and is movable in parallel in the up-down and left-right directions toward the door surface of the one door, and The lever-side projection 28 is provided on the door (left door 4L) and is inserted into the door so as to be movable in parallel in the up-down and left-right directions toward the door surface of the other door, and includes an insertion portion (left U-shaped metal fitting 13L) that stops the inserted lever-side projection 28 from moving in the double-opening direction, and a slip-out prevention means (right U-shaped metal fitting 13R, lever-side locking portion 30) that prevents the lever-side projection 28 from slipping out of the insertion portion when the lever-side projection 28 is inserted into the insertion portion and the operating lever 21 has moved downward toward the door surface of one of the doors.

[0050] The door lock device 7 is a door lock device that is provided on one door and the other door (left and right doors 4L, 4R) that opens like a double door, and that locks and unlocks the one and other doors, and has a lever-side protrusion 28, a lever-side engaging portion 30, and a lever-side operating portion 25, and is provided on one door (right door 4R) and is rotatable about an axis perpendicular to the door surface of the one door, and is movable in parallel up and down and left and right toward the door surface of the one door; The door is provided with an insertion portion (left U-shaped metal fitting 13L) that is inserted toward the door surface in a state where it can move parallel in the up / down and left / right directions and stops the inserted lever-side protrusion 28 from moving in the direction of opening the doors like a folding door, and a door-side locking portion (right U-shaped metal fitting 13R) that is provided on one of the doors and that, when the lever-side protrusion 28 is inserted into the insertion portion and the operating lever 21 moves downward toward the door surface of the one door, locks with the lever-side locking portion 30 when the operating lever rotates toward the other door, preventing the lever-side protrusion 28 from coming out of the insertion portion.

[0051] The door locking device 7 is provided on one and the other doors (left and right doors 4L, 4R) of the container 3 that constitutes the loading platform of the box-shaped truck 1, which open like a double door.

[0052] According to this embodiment, in the locked state, the lever-side protrusion 28 is inserted into the insertion portion (left U-shaped metal fitting 13L) by the slip-out prevention means (right U-shaped metal fitting 13R, lever-side locking portion 30), and when the operating lever 21 moves downward toward the door surface of one of the doors (left door 4L), it is possible to prevent the lever-side protrusion 28 from slipping out of the insertion portion. This eliminates the need to tighten the fitting and locking of the door locking device 7 or the connection of the rotating portion, and does not require a strong force to lock and unlock the door, allowing for smooth operation, which is convenient for the user.

[0053] <Configuration of Modified Example of the Present Invention> Fig. 6 is a rear view showing an enlarged view of the door locking device and its surroundings in a locked state according to a modified example of the present invention, and Fig. 7 is a rear view showing an enlarged view of the door locking device and its surroundings in an unlocked state according to a modified example of the present invention.

[0054] As shown in FIGS. 6 and 7, door locking devices 7R, 7L according to a modified embodiment of the present invention are provided on frame portions 8L, 8R of left and right doors 4L, 4R.

[0055] The door locking device 7R has the same structure as the door locking device 7 shown in Figures 1 to 5. Therefore, as shown in Figures 6 and 7, the door locking device 7R has a pin 11R, left and right U-shaped metal fittings 12L, 12R, left and right U-shaped metal fittings 13L, 13R, operating lever 21R, straight portion 22R, inclined portion 23R, straight portion 24R, lever side operating portion 25R, insertion hole 26R, lever side protrusion 27R, lever side protrusion 28R, straight portion 29R, lever side engaging portion 30R, engaging piece 31R, inclined portion 32R, inclined portion 33R, tip side The portion 34R has the same structure as the pin 11R, the left and right U-shaped metal fittings 12L, 12R, the left and right U-shaped metal fittings 13L, 13R, the operating lever 21, the straight portion 22, the inclined portion 23, the straight portion 24, the lever side operating portion 25, the insertion hole 26, the lever side protrusion 27, the lever side protrusion 28, the straight portion 29, the lever side locking portion 30, the locking piece 31, the inclined portion 32, the inclined portion 33, and the tip side portion 34 of the door locking device 7 shown in Figures 1 to 5.

[0056] As shown in Figures 6 and 7, door locking device 7L has a structure that is substantially the same as door locking device 7R, but with a symmetrical structure, except that straight portion 22L is extended from straight portion 22R, and left and right U-shaped metal fittings 14L and 14R and left and right U-shaped metal fittings 15L and 15R are used instead of left and right U-shaped metal fittings 12L and 12R and left and right U-shaped metal fittings 13L and 13R.

[0057] Therefore, the pin 11L, operating lever 21L, straight portion 22L, inclined portion 23L, straight portion 24L, lever-side operating portion 25L, insertion hole 26L, lever-side protrusion 27L, lever-side protrusion 28L, straight portion 29L, lever-side locking portion 30L, locking piece 31L, inclined portion 32L, inclined portion 33L, and tip side portion 34L of straight portion 29L of the door locking device 7L have substantially the same structure as the pin 11R, operating lever 21R, straight portion 22R, inclined portion 23R, straight portion 24R, lever-side operating portion 25R, insertion hole 26R, lever-side protrusion 27R, lever-side protrusion 28R, straight portion 29R, lever-side locking portion 30R, locking piece 31R, inclined portion 32R, inclined portion 33R, and tip side portion 34R of straight portion 29R of the door locking device 7R, which are left and right symmetrical.

[0058] To the left frame portion 8L, a pin 11L, a left U-shaped metal fitting 12L, a left U-shaped metal fitting 14L, a left U-shaped metal fitting 13L, and a left U-shaped metal fitting 15L are fixed by welding, in that order from the top.

[0059] A pin 11R, a right U-shaped metal fitting 12R, a right U-shaped metal fitting 14R, a right U-shaped metal fitting 13R, and a right U-shaped metal fitting 15R are fixed to the right frame portion 8R by welding.

[0060] The door locking device 7R can be locked and unlocked by performing the same operations as those of the door locking device 7 shown in FIGS.

[0061] The door lock device 7L can be locked and unlocked by performing the left-right reverse operation to that of the door lock device 7 shown in FIGS.

[0062] According to this modified example, the same effect as the door locking device 7 shown in Figures 1 to 5 can be obtained, and by adding the door locking device 7L in addition to the door locking device 7R similar to the door locking device 7, the left and right doors 4L, 4R can be locked more reliably.

[0063] In the explanation of Figures 1 to 7, the door lock device of this embodiment and the modified example is applied to the door of a container that constitutes the loading platform of a box-shaped truck (van body) or the like, but it can also be applied to other doors, such as the door of a single marine container (or other container (e.g., railway, trailer, etc.)), the door of a ship, etc.

[0064] Also, the left door locking device 7L of the modified example shown in FIGS. 6 and 7 can be provided alone.

[0065] Furthermore, in the embodiment and modifications of the present invention shown in FIGS. 1 to 7, the size and material of the door locking devices 7, 7L, 7R can be changed in various ways.

[0066] In this way, the structure of the present invention, the connections between the various components, and the like can be modified in various ways without departing from the spirit of the present invention.

[0067] Materials can also be freely selected, including metal, plastic, FRP, wood, etc. For example, two or more members can be combined into one, or conversely, one member can be made up of two or more separate members and connected together.

[0068] Furthermore, the above-described embodiment and modified examples are merely two of the best modes currently available or modes close to them.

[0069] 1 Truck 2 Rear chassis 3 Container 4L, 4R Left and right doors 5L, 5R Left and right hinges 6L, 6R Left and right door locking devices 6La, 6Ra Lock rod 6Lb, 6Rb Lever 7, 7L, 7R Door locking device 8L, 8R Frame portion 11R Pin 12L, 12R, 13L, 13R, 14L, 14R, 15L, 15R U-shaped metal fittings 21, 21L, 21R Operating levers 22, 22L, 22R Straight portion 23, 23L, 23R Inclined portion 24, 24L, 24R Straight portion 25, 25L, 25R Lever side operating portion 26, 26L, 26R Insertion hole 27, 27L, 27R, 28, 28L, 28R Lever side protrusion 29, 29L, 29R: Straight portion 30, 30L, 30R: Lever side locking portion 31, 31L, 31R: Locking piece 32, 32L, 32R: Inclined portion 33, 33L, 33R: Inclined portion 34, 34L, 34R: Tip side portion

Claims

1. A door locking device that is provided on one and other doors that open like a double door and locks and unlocks the one and other doors, comprising: an operating lever that has a lever-side protrusion and a lever-side operating part, is provided on the one door, is rotatable around an axis perpendicular to the door surface of the one door, and is capable of moving parallel to the door surface in the up-down and left-right directions; an insertion part that is provided on the other door, and into which the lever-side protrusion is inserted in a state that allows it to move parallel to the door surface of the other door in the up-down and left-right directions, and stops the movement of the inserted lever-side protrusion in the double door opening direction; and a removal prevention means that prevents the lever-side protrusion from coming out of the insertion part when the lever-side protrusion is inserted into the insertion part and the operating lever is moved downward toward the door surface of the one door.

2. A door locking device that is provided on one and the other doors that open like a double door, and that locks and unlocks the one and the other doors, comprising: an operating lever that has a lever-side protrusion, a lever-side locking portion, and a lever-side operating portion, that is provided on the one door and is rotatable around an axis that is perpendicular to the door surface of the one door and that is movable in parallel up and down and left and right toward the door surface of the one door; an insertion portion that is provided on the other door and into which the lever-side protrusion is inserted in a state that it can move in parallel up and down and left and right toward the door surface of the other door, and that stops the movement of the inserted lever-side protrusion in the double door opening direction; and a door-side locking portion that is provided on the one door and that engages with the lever-side locking portion when the operating lever rotates toward the other door with the lever-side protrusion inserted into the insertion portion and the operating lever moved downward toward the door surface of the one door, preventing the lever-side protrusion from coming out of the insertion portion.

3. The door lock device according to claim 1 or 2, which is provided on one and the other doors of a container that constitutes the loading platform of a box-shaped truck, and which opens like a double door.

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