Door locking device

Abstract

The present invention provides a door locking device that enables easy and quick locking and unlocking of a door. [Solution] The door locking device of this invention is for locking and unlocking a door that consists of a first door 31 having an engagement hole or engagement recess and a second door 32 having an engagement hole or engagement recess. The locking device is composed of a locking device body 2 which is made of a long rod-shaped member. The locking device body 2 is rotatable with a pivot shaft 8 inserted through its center as a pivot point. It has a locking portion configured to engage with the engagement hole or engagement recess on one end in the longitudinal direction, and a locking portion configured to engage with the engagement hole or engagement recess on the other end. The engagement hole or engagement recess has a specific configuration.

Description

Technical Field

[0005] , , , , ,

[0001] This invention relates to a door lock device. More specifically, it relates to a door lock device that enables easy and rapid locking and unlocking of a door, particularly a pair of doors arranged side by side in a predetermined direction.

Background Art

[0002] Conventionally, as a method for transporting granular materials such as wood pellets, there is a method using a bulk container that utilizes a box-shaped container. Some of these bulk containers have a door (opening / closing door) or hatch on their upper wall or ceiling.

[0003] For example, in Utility Model Registration No. 3129196 (Patent Document 1), a container for transporting granular materials that can prevent condensation inside the outer plate of the container has been proposed.

[0004] <000...... (The content seems incomplete from here, but I'm translating based on what's provided.)This container for transporting granular materials in a bulk pile is a box-shaped container with corner fittings at the upper and lower four corners. This container has a ceiling hatch for loading on the ceiling part and also an end inlet at the upper part of the rear end face of the container. The lower part of the rear end face of the container has a rear discharge port for unloading. It is possible to load and transport granular materials from the ceiling hatch or the rear inlet, and the container has a heat-insulating structure for the six faces that make it up.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

[0006] In the bulk transport container for powders and granules described in Patent Document 1, in order to lock and unlock the ceiling hatch 30, it is necessary for an operator to climb onto the ceiling and operate a locking device or locking means provided on the ceiling hatch 30. Therefore, considering the safety of workers, especially those working in poor working environments such as places where dust generated from powders and granules is scattered, further improvements are needed in making it easy and quick to lock and unlock doors or hatches.

[0007] In view of the current situation, this invention aims to provide a door locking device that enables easy and quick locking and unlocking of a door. [Means for solving the problem]

[0008] The invention described in claim 1 of this invention is, A door locking device for locking and unlocking a door that opens and closes in a predetermined direction, The aforementioned door consists of a first door and a second door. The first door and the second door are configured to sway or move in a direction in which their leading edges move closer together or further apart. The first door is provided with a first engaging portion at its leading edge end, The second door is provided with a second engaging portion at its leading edge end. The aforementioned door locking device consists of a locking device body made entirely of a long, rod-shaped member. The locking device body has a pivot shaft insertion hole in its central part for inserting a pivot shaft, is rotatable with respect to the pivot shaft inserted through the pivot shaft insertion hole, has a first locking portion configured to engage with the first engaging portion on one end in the longitudinal direction, and has a second locking portion configured to engage with the second engaging portion on the other end. Both the first engaging portion and the second engaging portion are composed of an engaging hole which is a through hole formed from the outside to the inside, or an engaging recess which is formed to be recessed from the outside to the inside. Each of the engagement holes or engagement recesses is formed such that, in a top view, its center is offset from the axis of the locking device body when the first door and the second door are locked closed, toward the rotational direction in which the engagement of the locking portion of the locking device body is released, and one of the engagement holes or engagement recesses is formed such that, in a top view, it extends by a required length toward the rotational direction in which the engagement of the first engagement portion and the second locking portion of the locking device body is released, compared to the other engagement hole or engagement recess. This is a door locking device characterized by the following:

[0009] The invention described in claim 2 of this invention is, In the door locking device according to claim 1, The locking device body is The diameter of the support shaft insertion hole is formed to be larger than the outer diameter of the support shaft, so that both ends in the longitudinal direction can swing in a direction parallel to the axial direction of the support shaft. It is characterized by the following:

[0010] The invention described in claim 3 of this invention is, In the door locking device according to claim 2, On the outer circumference of the support shaft, an annular member is mounted, maintaining a required distance from the upper opening edge of the support shaft insertion hole, and extending in a direction perpendicular to the axial direction of the support shaft, so that both longitudinal ends of the locking device body swing within a predetermined range along a direction parallel to the axial direction of the support shaft. It is characterized by the following:

[0011] The invention described in claim 4 of this invention is, In the door locking device according to claim 1 or 2, The first locking portion and the second locking portion are both It is composed of rotating bodies rotatably connected to both longitudinal ends of the lock device main body respectively. It is characterized by the above.

[0012] The invention according to claim 5 of this invention is In the door lock device according to claim 1 or 2, The first door and the second door Are arranged side by side with a predetermined interval therebetween, The lock device main body Is disposed between the first door and the second door. It is characterized by the above.

[0013] The invention according to claim 6 of this invention is In the door lock device according to claim 5, The first engaging portion Is formed on a first flange portion extending from the edge of the leading end side of the first door toward the second door, The second engaging portion Is formed on a second flange portion extending from the edge of the leading end side of the second door toward the first door. It is characterized by the above.

[0014] The invention according to claim 7 of this invention is In the door lock device according to claim 6, The first flange portion Is extended from the edge of the leading end side of the first door so as to be located at a required height from the wall surface, and includes a first inclined portion formed to incline downward in the rotation direction in which the engagement of the first locking portion of the lock device main body is released from the edge of the first flange portion. The second flange portion Is extended from the edge of the leading end side of the second door so as to be located at a required height from the wall surface, and includes a second inclined portion formed to incline downward in the rotation direction in which the engagement of the second locking portion of the lock device main body is released from the edge of the second flange portion. It is characterized by the above.

[0015] The invention described in claim 8 of this invention is, In the door locking device according to claim 1 or 2, The first door and the second door are The ends of the doors on the front-end side are configured to swing in a direction that moves them closer together or further apart. It is characterized by the following: [Effects of the Invention]

[0016] The door locking device according to this invention locks and unlocks a door that opens and closes in a predetermined direction, wherein the door is composed of a first door and a second door, the first door and the second door are configured to swing or move in a direction in which their leading edge ends approach or move away from each other, the first door is configured to have a first engaging part at its leading edge end, the second door is configured to have a second engaging part at its leading edge end, the door locking device is composed of a locking device body made entirely of a long rod-shaped member, the locking device body has a pivot shaft insertion hole in its center for inserting a pivot shaft, is rotatable with the pivot shaft inserted through the pivot shaft insertion hole as a fulcrum, has a first locking part configured to engage with the first engaging part at one end in the longitudinal direction, and has the second engaging part at the other end The locking device has a second locking portion configured to engage with the first locking portion, and both the first locking portion and the second locking portion are composed of an engagement hole, which is a through hole formed from the outside to the inside, or an engagement recess, which is formed to be recessed from the outside to the inside, and in a top view, the center of each engagement hole or engagement recess is offset from the axis of the locking device body when the first door and the second door are locked closed, toward the rotation direction toward which the engagement of the first locking portion and the second locking portion of the locking device body is released, and in a top view, one engagement hole or engagement recess is formed to extend by a required length longer than the other engagement hole or engagement recess toward the rotation direction toward which the engagement of the locking portion of the locking device body is released. Therefore, with this door locking device (or door locking mechanism), the locking device body constituting the door locking device can be locked and unlocked with just one operation, specifically by rotating it in a predetermined direction. Therefore, this door locking device makes it possible to lock and unlock the door easily and quickly.

[0017] In the aforementioned door locking device, by forming the diameter of the pivot shaft insertion hole in the locking device body to be larger than the outer diameter of the pivot shaft, the locking device body can be configured so that both ends in its longitudinal direction are oscillating in a direction parallel to the axial direction of the pivot shaft. This configuration makes it possible to lock and unlock the first and second doors more smoothly and reliably.

[0018] In the door locking device described above, the first locking portion and the second locking portion can be configured as rotating bodies that are rotatably connected to each of the longitudinal edges of the locking device body. This configuration makes it possible to lock and unlock the first and second doors more smoothly and reliably.

[0019] Furthermore, in the door locking device, the first engaging portion can be formed on a first flange portion extending from the leading edge of the first door toward the second door, and the second engaging portion can be formed on a second flange portion extending from the leading edge of the second door toward the first door. In this case, the first flange portion may be extended from the leading edge of the first door so as to be located at a required height from the wall surface, and the first flange portion may be provided with a first inclined portion formed to slope downward from its edge toward the rotational direction in which the engagement of the first locking portion of the locking device body is released. The second flange portion may be extended from the leading edge of the second door so as to be located at a required height from the wall surface, and the second flange portion may be provided with a second inclined portion formed to slope downward from its edge toward the rotational direction in which the engagement of the second locking portion of the locking device body is released. This configuration makes it possible to lock and unlock the first and second doors more smoothly and reliably.

[0020] Furthermore, the first door and the second door can be configured to swing in a direction in which their leading edges move closer together or further apart. That is, the first door and the second door may constitute a pair of hinged rotating doors, and the door locking device can be used as a locking device to lock such doors in the closed position. [Brief explanation of the drawing]

[0021] [Figure 1] This is a top view showing one embodiment of the door locking device according to the present invention. [Figure 2] Figure 1 is an enlarged top view of the door and door locking device shown. [Figure 3] This is an enlarged view of the main part of Figure 2. [Figure 4] (A) is a cross-sectional view of A-A' in Figure 2, and (B) is an enlarged view of the main part of (A). [Figure 5] Figure 3 is an explanatory diagram of each door. [Figure 6] Figure 2 is an explanatory diagram illustrating an example of the process by which the door locking device shown in Figure 2 engages with the engaging parts on each door. [Figure 7] Figure 2 is an explanatory diagram showing an example of the engagement state between one locking portion of the door locking device and one engaging portion of the door. [Figure 8] This is an explanatory diagram showing an example of the engagement state between the locking part of the door locking device shown in Figure 2 and the engaging part of the other door. [Figure 9] This is an explanatory diagram showing a locking mechanism according to one embodiment of the door locking device according to this invention. [Modes for carrying out the invention]

[0022] An example of the implementation of the door locking device according to this invention will be specifically described below with reference to the attached drawings. Furthermore, this invention is not limited to the disclosed embodiments, and various improvements can be made without altering its essence.

[0023] In this invention, descriptions of numerical ranges such as "greater than or equal to XX and less than or equal to XX" or "XX to XX" mean a numerical range that includes the lower and upper limits, which are the endpoints, unless otherwise specified. When numerical ranges are described in steps, the upper and lower limits of each numerical range can be combined in any way.

[0024] Furthermore, in this specification and drawings, terms indicating directions such as up and down, front and back, left and right are established for the convenience of explaining this embodiment, and up and down, front and back, left and right may be changed as appropriate depending on the situation at the time.

[0025] Figure 1 is a top view showing one embodiment of the door locking device 1 according to the present invention. In Figure 1, two openings 11a and 11b are formed in the upper wall (ceiling wall) 11 of the container, arranged side by side with a predetermined distance between them in the front-to-back direction. Although not specifically shown in the diagram, the container is constructed in a long, narrow box shape, consisting of a top wall, a pair of longitudinal side walls, a front end side wall, and a bottom wall.

[0026] In Figure 1, of the openings 11a and 11b, the first door 31 is attached to the upper wall 11 so that the front opening (first opening) 11a can be opened and closed, and the second door 32 is attached to the upper wall 11 so that the rear opening (second opening) 11b can be opened and closed. In this embodiment, both the first door 31 and the second door 32 are made of metal from the viewpoint of maintaining strength during use, but there are no particular restrictions on the material as long as it has sufficient strength to not be damaged during use.

[0027] In Figure 1, the first door 31 and the second door 32 are configured to have a roughly rectangular shape in plan view, with the required size to match the shape and size of the openings 11a and 11b. Furthermore, there are no particular restrictions on the shape or size of the first door and the second door, and they can be appropriately selected according to the size and shape of the opening, etc.

[0028] Figure 2 is an enlarged top view of the doors 31 and 32 and the door locking device 1 shown in Figure 1. In Figure 2, both the first door 31 and the second door 32 constitute hinged rotating doors. Specifically, the first door 31 has its front end pivotally supported by hinges 31a, 31a so as to be able to open and close in the front-rear direction, and its rear end (the end on the door-edge side) 31b is a free end (the end opposite to the end with the hinge; the end on the pivoting tip side), thus forming a door (opening / closing door or hatch) that can be folded back forward. On the other hand, the second door 32 has its rear end pivotally supported by hinges 32a, 32a so as to be able to open and close in the front-rear direction, and its front end (the end on the door-edge side) 32b is a free end, thus forming a door (opening / closing door or hatch) that can be folded back backward. The first door 31 and the second door 32 can be understood as constituting a so-called double-door type door (door device) 3. Therefore, as shown in Figure 2, when the openings 11a and 11b are closed, the free ends of the first door 31 and the second door 32 face each other, and when the free ends of the first door 31 and the second door 32 rotate (oscillate) in a direction away from each other outward, the openings 11a and 11b are opened, while when they rotate (oscillate) in a direction towards each other, the openings 11a and 11b are closed. In Figure 2, reference numerals 31c, 31d, 32c, and 32d all indicate handles that can be used when opening and closing doors 31 and 32.

[0029] In this embodiment, both the first door 31 and the second door 32 constitute hinged rotating doors. However, there are no particular restrictions on their configuration as long as they are configured such that the openings 11a and 11b are closed when the ends of the doors move or swing (rotate) toward each other, and are opened when they move or swing (rotate) toward each other. For example, the opening and closing movement of the first door 31 and the second door 32 may be done by sliding (sliding type).

[0030] In this invention, the first door 31 is provided with a first engaging portion 62 at its leading edge end 31b. Similarly, the second door 32 is provided with a second engaging portion 72 at its leading edge end 32b. The specific configurations of the first engaging portion 62 and the second engaging portion 72 will be described in detail later.

[0031] The door locking device 1 enables the locking of the first door 31 and the second door 32 to prevent them from being opened unintentionally, and in Figures 1 and 2, it is installed on the wall surface 11c between the first door 31 and the second door 32. Furthermore, there are no particular restrictions on the placement of the door locking device 1, as long as it is configured to rotate and engage with or disengage from the engaging portions 62 and 72 provided on the first door 31 and the second door 32, respectively.

[0032] Figure 3 is an enlarged view (top view) of the main part of Figure 2. As shown in Figure 3, the aforementioned door locking device 1 is composed of a long, rod-shaped locking device body 2. In this embodiment, the locking device body 2 is made of metal from the viewpoint of maintaining strength during use, but there are no particular restrictions on the material as long as it has sufficient strength to not be damaged during use.

[0033] In Figure 3, the locking device body 2 is rotatably supported by a support shaft 8 that protrudes upward from the wall surface 11c via a support member 12, with the support shaft 8 serving as the pivot point. In Figure 3, reference numeral 13 denotes a restricting member that contacts the locking device body 2, which constitutes the door locking device 1, and restricts its rotation to occur within a predetermined range. It is composed of a plate-like body with a roughly L-shape in cross-section.

[0034] Figure 4 is a cross-sectional view, where (A) is a cross-sectional view of A-A' in Figure 2, and (B) is an enlarged view of the main part of (A). In Figure 4, the support member 12 protrudes upward from the wall surface 11c, and the support shaft 8 protrudes upward from the support member 12. The locking device body 2 has a support shaft insertion hole 2a in its longitudinal center through which the support shaft 8 for rotation of the locking device body 2 is inserted. This support shaft insertion hole 2a is formed to penetrate in the vertical direction. Therefore, the locking device 1 is rotatable with the support shaft 8 inserted through the support shaft insertion hole 2a as the pivot point.

[0035] Furthermore, the locking device body 2 is provided with a locking portion (first locking portion) 4 that engages with the first engaging portion 62 at one end in its longitudinal direction (left end in Figure 4), and a locking portion (second locking portion) 5 that engages with the second engaging portion 72 at the other end (right end in Figure 4).

[0036] With this configuration, when the locking device 1 is rotated in a counterclockwise direction when viewed from above (direction Q in Figures 2 and 3), it engages with the first engaging portion 62 and the second engaging portion 72 provided on the first door 31 and the second door 32, respectively, and locks both doors 31 and 32 in a closed position. On the other hand, when the locking device 1 is rotated clockwise in a top view (direction R in Figures 2 and 3), it disengages from the first engaging portion 62 and the second engaging portion 72, thereby releasing the lock on both doors 31 and 32. Therefore, there are no particular restrictions on the longitudinal length of the locking device body 2, as long as both ends in the longitudinal direction are configured to engage with and disengage from the engaging portions 62 and 72 provided on the doors 31 and 32, so that the doors 31 and 32 can be locked or unlocked.

[0037] Figure 5 is an explanatory diagram of the first door 31 and the second door 32. In Figure 5, the first door 31 is provided with a first engaging member 6 near the center of its leading edge end 31b in a direction perpendicular to the opening and closing direction (left-right direction in Figure 5), and the second door 32 is provided with a second engaging member 7 at its leading edge end 32b. In Figure 5, the second engaging member 7 is positioned relative to the first engaging member 6, offset towards the rotational direction in which the engagement of the locking portion of the locking device 1 is released.

[0038] In Figure 5, the first engaging member 6 has a first flange portion 61 that extends horizontally toward the rear from the leading edge of the first door 31 toward the second door 32. In this first flange portion 61, an engaging hole (first engaging hole) is formed as a first engaging portion 62, which is a through hole that penetrates from the outside toward the inside (vertically in this embodiment). The first engaging hole 62 is configured to engage with or fit with at least a part of the locking portion 4 provided by the locking device body 2, and in Figure 5, it has a roughly rectangular shape that is long in the left-right direction when viewed from above. Similarly, the second engaging member 7 has a second flange portion 71 that extends horizontally forward from the leading edge of the second door 32 toward the first door 31, and a second engaging hole (second engaging hole) is formed in this second flange portion 71 as a second engaging portion 72, which penetrates from the outside toward the inside (vertically in this embodiment). The second engaging hole 72 is configured so that at least a part of the locking portion 5 provided by the locking device body 2 can engage or fit into it, and in Figure 5, it has a roughly rectangular shape that is long in the left-right direction when viewed from above.

[0039] Furthermore, the engaging portion only needs to be configured to be able to engage with at least a part of the locking portion provided by the locking device body 2, and may be engaged or fitted. Furthermore, in this embodiment, the engaging portions 62 and 72 are composed of engaging holes consisting of through holes formed in the vertical direction, but there are no particular restrictions on their configuration as long as they are configured to engage with or fit with at least a part of the locking portions 4 and 5 provided on the locking device body 2. For example, the engaging portions 62 and 72 may be composed of engaging or fitting recesses formed to be recessed from the outside inward (downward) with the required depth and size. Even in this case, the engaging or fitting recesses can be constructed based on the description of the engaging holes.

[0040] Preferably, the engagement holes 62 and 72 are formed at a position where their centers P1 and P2 are offset from the axis O of the locking device body 2, in the state where the doors 31 and 32 are locked closed, towards the rotational direction side where the engagement of the locking parts (first locking part 4 and second locking part 5) of the locking device body 2 is released. The centers can be determined by known methods. In Figure 5, the engagement hole 62 is formed at a distance of approximately 1 mm to 2 mm from the axis O of the locking device body 2 when the doors 31 and 32 are locked closed, in the direction of rotation in which the engagement of the locking part of the locking device body 2 is released (to the left in Figure 5). The engagement hole 72 is formed at a distance of approximately 1 mm to 2 mm from the axis O of the locking device body 2 when the doors 31 and 32 are locked closed, in the direction of rotation in which the engagement of the locking part of the locking device body 2 is released (to the right in Figure 5).

[0041] More preferably, of the engagement holes 62 and 72, one engagement hole is formed to extend by a required length longer than the other engagement hole in the direction of rotation where the engagement of the locking portion (first locking portion 4 and second locking portion 5) of the locking device body 2 is released, as viewed from above. In Figure 5, both engagement holes 62 and 72 have a roughly rectangular shape that is elongated in the left-right direction when viewed from above. However, one engagement hole (engagement hole 72 in Figure 5) is formed to extend by a length L longer than the other engagement hole (engagement hole 62 in Figure 5) toward the rotation direction (rightward in Figure 5) toward the direction in which the engagement of the locking part of the locking device body 2 is released. Therefore, when the door locking device 1 is rotated, the locking portions (4, 5) at both longitudinal ends of the door locking device 1 do not engage with both engagement holes (62, 72) simultaneously. Rather, one of the locking portions (locking portion 5 in this embodiment) first engages with one of the engagement portions (engagement hole 72 in Figure 5), and then the other locking portion (locking portion 4 in this embodiment) engages with the other engagement portion (engagement hole 62 in Figure 5). As a result, locking and unlocking the aforementioned doors (the first door and the second door) becomes possible more smoothly and reliably. The length L can be appropriately selected according to the shape and size of the locking part, and there are no particular restrictions, but for example, it can be set to approximately 1 mm to 2 mm.

[0042] There are no particular restrictions on the method of engaging the locking portion 4 on one longitudinal end of the locking device body 2 with the engaging portion 62 provided on the first door 31, and the method of engaging the locking portion 5 on the other longitudinal end of the locking device body 2 with the engaging portion 72 provided on the second door 32, and known engaging means and methods may be used.

[0043] In this embodiment, as shown in Figure 4(A), the locking device body 2 is configured to have a rotating body (roller) 41 as a locking part 4 at one end edge in the longitudinal direction and a rotating body (roller) 51 as a locking part 5 at the other end edge. Both the rotating bodies 41 and 51 are rotatably connected to the locking device body 2 and rotate in conjunction with the rotation of the door locking device 1. In this embodiment, both the rotating bodies 41 and 51 are rotatable about the axis of the locking device body 2. In this embodiment, both the rotating bodies 41 and 51 are made of ball bearings, but there are no particular restrictions on their configuration, and they can be made of known or future-developed rotating bodies. On the other hand, in this embodiment, the engagement hole 62 is formed to extend through along the leading edge end 31b of the door 31 (along the left-right direction in Figure 5) so that at least a portion of the circumferential surface of the rotating body 41 can be fitted into it. Similarly, the engagement hole 72 is formed to extend through along the leading edge end 32b of the door 32 (along the left-right direction in Figure 5) so that at least a portion of the circumferential surface of the rotating body 51 can be fitted into it. Therefore, as shown in Figure 7, a portion of the circumferential surface of the rotating body 41 fits into the engagement hole 62, and as shown in Figure 8, a portion of the circumferential surface of the rotating body 51 fits into the engagement hole 72, thereby engaging or fitting the rotating bodies 41 and 51, which act as locking parts, with the engagement holes 62 and 72 provided in the doors 31 and 32. In this embodiment, the rotating bodies 41 and 51 are configured such that, when the doors 31 and 32 are locked closed, approximately 0.7 mm to 1.0 mm in the radial direction from their circumferential surface fits into the engagement holes 62 and 72.

[0044] In this embodiment, the locking device body 2 is formed such that the diameter (size) of its pivot shaft insertion hole 2a is slightly larger than the outer diameter (thickness) of the pivot shaft 8, as shown in Figure 4(B). Therefore, both ends of the door locking device 1 in the longitudinal direction are able to swing in a direction parallel to the axial direction of the pivot shaft 8.

[0045] Figure 6 is an explanatory diagram illustrating an example of the process by which the door locking device shown in Figure 2 engages with the engaging portion of each door. As shown in Figure 6, the locking device body 1 is configured to create a state in which, when one end (the left end in Figure 6) swings downward, the other end (the right end in Figure 6) swings upward. Furthermore, in this embodiment, of the engagement holes 62 and 72, one engagement hole (engagement hole 72 as shown in Figure 5) is formed to extend longer than the other engagement hole (engagement hole 62 as shown in Figure 5) in the rotational direction (counterclockwise direction; leftward in Figure 5) in which the engagement of the locking part of the locking device 1 is released, as viewed from above. Therefore, when the door locking device 1 is rotated, one of the locking parts (the rotating body 51 as locking part 5 in this embodiment) first engages with one of the engaging parts (the engaging hole 72 in this embodiment), and at the same time, the one locking part swings downward (Figure 6(B)). Then, the other locking part (the rotating body 41 as locking part 4 in this embodiment) engages with the other engaging part (the engaging hole 62 in this embodiment), and at the same time, the other locking part swings downward (Figure 6(C)). As a result, locking and unlocking the aforementioned doors (the first door and the second door) becomes possible more smoothly and reliably.

[0046] In this embodiment, as shown in Figure 4, a pair of annular members 10a and 10b are mounted on the outer circumference of the support shaft 8, maintaining a required distance from the upper opening edge 2b of the support shaft insertion hole 2a, and extending in a direction perpendicular to the axial direction of the support shaft 8 (horizontal direction in Figure 4). The pair of annular members 10a and 10b are configured such that the outer diameter of at least the annular member 10a located on the support shaft insertion hole 2a side is larger than the outer diameter of the support shaft insertion hole 2a. With this configuration, a gap S of a required size is formed between the lower end edge (bottom surface) of the annular member 10a and the upper opening edge 2b, extending in the axial direction of the support shaft 8. Therefore, both longitudinal ends of the locking device body 2 constituting the door locking device 1 are configured to swing within a predetermined range along a direction parallel to the axial direction of the support shaft 8. In other words, the pair of annular members 10a and 10b constitute a swing range adjustment member 10 that adjusts the swing range at both longitudinal ends of the locking device body 2. In Figure 4, the annular members 10a and 10b are both made of nuts, and the support shaft 8 is made of a bolt, with the upper edge (top surface) of the annular member (second annular member) 10b in contact with the lower end of the head 8a of the bolt. Furthermore, in Figure 4, above the support shaft insertion hole 2a, there is a housing space 9 that communicates with the support shaft insertion hole 2a and is formed to accommodate at least a part of the annular member 10a (the lower end in Figure 4).

[0047] The engagement holes 62 and 72 may be positioned at a required height, and a guide mechanism may be provided to guide the movement of the rotating bodies 41 and 51 toward these engagement holes 62 and 72. In Figure 7, the flange portion 61 extends from the leading edge of the door 31 to a required height from the wall surface 11c, and an engagement hole 62 is formed in this flange portion 61. A first inclined portion 63 is formed from the edge of the flange portion 61, sloping downward in the rotational direction (counterclockwise; to the right in Figure 7) in which the engagement of the locking part of the door lock device 1 is released. Similarly, in Figure 8, the flange portion 71 extends from the leading edge of the door 32 to a required height from the wall surface 11c, and an engagement hole 72 is formed in this flange portion 71. A second inclined portion 73 is formed from the edge of the flange portion 71, sloping downward in the rotational direction (counterclockwise; to the left in Figure 8) in which the engagement of the locking part of the door lock device 1 is released. Therefore, when the door locking device 1 is rotated in the direction that locks the doors 31 and 32 closed, the rotating bodies 41 and 51 move along the inclined portions 63 and 73, respectively, and engage (fit) with the engagement holes 62 and 72 formed in the flange portions 61 and 71. In Figures 7 and 8, reference numerals 64a and 74a represent flange support sections that are erected upward from the wall surface 11c to support the flange sections 61 and 71 to a predetermined height, while reference numerals 64b and 74b represent inclined section support sections that are erected upward from the wall surface 11c to support the inclined sections 63 and 73.

[0048] In the door locking device 1 with this configuration, when the doors 31 and 32 are not locked closed, as shown in Figure 9(A), one of the locking parts 4, the rotating body 41 of the door locking device 1, is disengaged from the engagement hole 62, which is the engagement part of the first door 31. At this time, the other locking part 5, the rotating body 51, is also disengaged from the engagement hole 72, which is the engagement part of the second door 32. In other words, the locks on both doors 31 and 32 are released.

[0049] From this state, as shown in Figure 9(B), when a force is applied to the door lock device 1 in a predetermined direction (counterclockwise direction Q in Figure 3), the door lock device 1 rotates around the pivot shaft 8. As the door lock device 1 is rotated further, as shown in Figures 9(B) to (D), the rotating body 41 of the door lock device 1 moves along the inclined portion 63 toward the flange portion 61 in which the engagement hole 62 is formed, while rotating. At this time, the rotating body 51 of the door lock device 1 also moves along the inclined portion 73 toward the flange portion 71 in which the engagement hole 72 is formed, while rotating.

[0050] Furthermore, when the door locking device 1 is rotated, the engagement hole 72 is formed to be longer than the engagement hole 62 in the direction of rotation where the engagement of the locking parts 4 and 5 of the door locking device 1 is released, as shown in Figure 9(E). First, one rotating body 51 engages (fits) with the engagement hole 72, and at the same time, the end of the door locking device 1 to which this rotating body 51 is attached swings downward. At this time, the end of the door locking device 1 to which the other rotating body 41 is attached swings upward.

[0051] Subsequently, when the door lock device 1 is rotated further, as shown in Figure 9(F), the rotating body 41 also engages (fits) with the engagement hole 62. As a result, the end of the door lock device 1 to which the rotating body 41 is attached swings downward, and the lock device body 2 that constitutes the door lock device 1 returns to a horizontal position. Therefore, since the first door 31 and the second door 32 are supported by the door locking device 1, both the first door 31, which closes the first opening 11a, and the second door 32, which closes the second opening 11b, are locked.

[0052] Furthermore, when the door locking device 1 is rotated counterclockwise, the rotating body 41, which acts as the locking part 4 of the door locking device 1, first disengages from the engagement hole 62 of the first door 31, and then the rotating body 51, which acts as the locking part 5, disengages from the engagement hole 72 of the second door 32, thereby releasing the lock on the doors 31 and 32.

[0053] In this embodiment, the door locking device 1 is configured such that when rotated counterclockwise, the door 3 is locked closed, while when rotated clockwise, the doors 31 and 32 are unlocked. However, the direction of rotation of the door locking device 1 can be changed as appropriate.

[0054] In this invention, the door locking device 1 may be configured such that it is possible to control the opening and closing of the doors and / or the rotation of the door locking device by providing known control means, driving means, etc., to the doors 31, 32 and / or the door locking device 1. This configuration makes it possible to automatically open and close the door, and to lock and unlock the door using the door locking device.

[0055] Furthermore, this invention may be configured to allow the door to be locked more securely by providing, in addition to the door locking device, another known locking device other than the door locking device as a second door locking device.

[0056] The door locking device 1 with the above configuration can be used as a locking device for doors (such as opening / closing doors and hatches), but it can also be used as a door locking device for opening / closing doors and hatches provided on containers, and is particularly suitable as a door locking device for containers. In this embodiment, the doors 31, 32 and the door locking device 1 are installed on the top wall (ceiling wall) of the container, but they may also be installed on parts other than the ceiling wall, such as the side walls or bottom walls.

[0057] Furthermore, in this embodiment, the door locking device 1 is installed on the upper wall (ceiling wall) of the container. However, if the door 3 to be locked and unlocked has the above configuration, the door locking device 1 of this invention can be applied, and it can be installed on parts other than the ceiling wall, such as the side walls or bottom walls.

[0058] [Configurations included in embodiments of the present invention] This embodiment includes the following configuration. (Configuration 1) A door locking device for locking and unlocking a door that opens and closes in a predetermined direction, The aforementioned door consists of a first door and a second door. The first door and the second door are configured to sway or move in a direction in which their leading edges move closer together or further apart. The first door is provided with a first engaging portion at its leading edge end, The second door is provided with a second engaging portion at its leading edge end. The aforementioned door locking device consists of a locking device body made entirely of a long, rod-shaped member. The locking device body has a pivot shaft insertion hole in its central part for inserting a pivot shaft, is rotatable with respect to the pivot shaft inserted through the pivot shaft insertion hole, has a first locking portion configured to engage with the first engaging portion on one end in the longitudinal direction, and has a second locking portion configured to engage with the second engaging portion on the other end. Both the first engaging portion and the second engaging portion are composed of an engaging hole which is a through hole formed from the outside to the inside, or an engaging recess which is formed to be recessed from the outside to the inside. Each of the engagement holes or engagement recesses is formed such that, in a top view, its center is offset from the axis of the locking device body when the first door and the second door are locked closed, toward the rotational direction in which the engagement of the locking portion of the locking device body is released, and one of the engagement holes or engagement recesses is formed such that, in a top view, it extends by a required length toward the rotational direction in which the engagement of the first engagement portion and the second locking portion of the locking device body is released, compared to the other engagement hole or engagement recess. A door locking device characterized by the following. (Configuration 2) The door locking device according to Configuration 1, wherein the locking device body is formed such that the diameter of the support shaft insertion hole is larger than the outer diameter of the support shaft, so that both ends in the longitudinal direction can swing in a direction parallel to the axial direction of the support shaft. (Configuration 3) The door locking device according to Configuration 2, wherein an annular member is mounted on the outer circumference of the support shaft, with the support shaft inserted through the support shaft hole, at a required distance from the upper opening edge of the support shaft insertion hole, and extending in a direction perpendicular to the axial direction of the support shaft, so that both longitudinal ends of the locking device body swing within a predetermined range along a direction parallel to the axial direction of the support shaft. (Configuration 4) The door locking device according to any one of Configurations 1 to 3, wherein the first locking portion and the second locking portion are both composed of rotating bodies that are rotatably connected to each of the longitudinal edges of the locking device body. (Configuration 5) The door locking device according to any one of Configurations 1 to 4, wherein the first door and the second door are arranged side by side with a predetermined distance between them, and the locking device body is disposed between the first door and the second door. (Configuration 6) The door locking device according to Configuration 5, wherein the first engaging portion is formed on a first flange portion extending from the leading edge of the first door toward the second door, and the second engaging portion is formed on a second flange portion extending from the leading edge of the second door toward the first door. (Configuration 7) The door locking device according to Configuration 6, wherein the first flange portion extends from the leading edge of the first door so as to be located at a required height from the wall surface, and includes a first inclined portion formed to slope downward from the edge of the first flange portion toward the rotational direction in which the engagement of the first locking portion of the locking device body is released, and the second flange portion extends from the leading edge of the second door so as to be located at a required height from the wall surface, and includes a second inclined portion formed to slope downward from the edge of the second flange portion toward the rotational direction in which the engagement of the second locking portion of the locking device body is released. (Configuration 8) The door locking device according to Configurations 1 to 7, wherein the first door and the second door are configured to swing in a direction in which their leading edge ends move closer together or further apart. [Industrial applicability]

[0059] The door locking device of this invention makes it possible to easily and reliably lock and unlock a pair of doors (opening / closing doors or hatches) that are arranged side by side on the wall surface of a container or the like, for example, in the left-right or up-down direction, with a predetermined distance between them. It can be used for any door with such a configuration. [Explanation of Symbols]

[0060] 1 Door locking device, 2 Locking device body, 2a Pivot shaft insertion hole, 3 Door, 31 First door, 31a Hinge, 31b Door edge end, 32 Second door, 32a Hinge, 32b Door edge end, 4 First locking part, 41 Rotating body (first rotating body), 5 Second locking part, 51 Rotating body (second rotating body), 6 First engaging part, 61 Flange part (first flange part), 62 First engaging hole, 63 Inclined part, 64a Flange part support part (first flange part support part), 64b Inclined part support part (first inclined part support part), 7 Second engaging part, 71 Flange part (second flange part), 72 Second engaging hole, 73 Inclined part, 74a Flange part support part (second flange part support part), 74b Inclined part support part (second inclined part support part), 8 Pivot shaft, 8a Head, 9 10. Enclosure space, 10. Swinging range adjustment member, 10a. First annular member (nut), 10b. Second annular member (nut), 11. Upper wall (ceiling wall), 11a. First opening, 11b. Second opening, 11c. Wall surface, 12. Support member, 13. Regulating member, S. Gap

Claims

1. A door locking device for locking and unlocking a door that opens and closes in a predetermined direction, The aforementioned door consists of a first door and a second door. The first door and the second door are configured to sway or move in a direction in which their leading edges move closer together or further apart. The first door is provided with a first engaging portion at its leading edge end, The second door is provided with a second engaging portion at its leading edge end. The aforementioned door locking device consists of a locking device body made entirely of a long, rod-shaped member. The locking device body has a pivot shaft insertion hole in its central part for inserting a pivot shaft, is rotatable with respect to the pivot shaft inserted through the pivot shaft insertion hole, has a first locking portion configured to engage with the first engaging portion on one end in the longitudinal direction, and has a second locking portion configured to engage with the second engaging portion on the other end. Both the first engaging portion and the second engaging portion are composed of an engaging hole which is a through hole formed from the outside to the inside, or an engaging recess which is formed to be recessed from the outside to the inside. Each of the engagement holes or engagement recesses is formed such that, in a top view, its center is offset from the axis of the locking device body when the first door and the second door are locked closed, toward the rotational direction in which the engagement of the locking portion of the locking device body is released, and one of the engagement holes or engagement recesses is formed such that, in a top view, it extends by a required length toward the rotational direction in which the engagement of the first engagement portion and the second locking portion of the locking device body is released, compared to the other engagement hole or engagement recess. A door locking device characterized by the following.

2. The locking device body is The diameter of the support shaft insertion hole is formed to be larger than the outer diameter of the support shaft, so that both ends in the longitudinal direction can swing in a direction parallel to the axial direction of the support shaft. A door locking device according to claim 1, characterized by the following:

3. On the outer circumference of the support shaft, an annular member is mounted, maintaining a required distance from the upper opening edge of the support shaft insertion hole, and extending in a direction perpendicular to the axial direction of the support shaft, so that both longitudinal ends of the locking device body swing within a predetermined range along a direction parallel to the axial direction of the support shaft. The door locking device according to claim 2, characterized by the following:

4. The first locking portion and the second locking portion are both The locking device body is composed of rotating bodies that are rotatably connected to each of the longitudinal edges. A door locking device according to claim 1 or 2, characterized by the following:

5. The first door and the second door are They are arranged side by side, maintaining a predetermined distance from each other. The locking device body is It is located between the first door and the second door. A door locking device according to claim 1 or 2, characterized by the following:

6. The first engagement portion is, Formed on the first flange portion extending from the leading edge of the first door toward the second door, The second engagement portion is, It is formed on the second flange portion that extends from the leading edge of the second door toward the first door. The door locking device according to claim 5, characterized by the following:

7. The first flange portion is, The first door is provided with a first inclined portion that extends from the edge of the door-side of the first door so as to be positioned at a required height from the wall surface, and is formed to slope downward from the edge of the first flange portion toward the rotational direction toward which the engagement of the first locking portion of the locking device body is released. The second flange portion is, The second door is provided with a second inclined portion that extends from the leading edge of the second door so as to be positioned at a required height from the wall surface, and is formed to slope downward from the edge of the second flange portion toward the rotational direction toward which the engagement of the second locking portion of the locking device body is released. The door locking device according to claim 6, characterized by the following:

8. The first door and the second door are The ends of the doors on the front-end side are configured to swing in a direction that moves them closer together or further apart. A door locking device according to claim 1 or 2, characterized by the following:

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