JP3159932B2 - Double door lock structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock structure of a double door that opens and closes in a double door manner, and more particularly to a lock structure of a double door used in a transport vehicle, a transport basket, a storage basket, a gate, a warehouse, and the like.

[0002] In this specification, the term "double door that opens and closes in a double-leafed manner" is used to include doors that open outward, open inside, and open both inside and outside.

[0003]

2. Description of the Related Art For example, a double door that opens and closes like a double door may be used for a container truck used for storing and delivering mails in a post office. Such a container truck has, for example, a frame structure, and has two rectangular unit doors (82) (82) arranged side by side on the front part thereof as shown in FIG. The double door (81) is arrange | positioned and comprised. These unit doors (8
2) (82) are respectively provided with a hinge member (not shown) in which a base vertical frame (not shown) located on the outside is attached to a support vertical frame (not shown) provided at the left and right corners at the front of the container truck. (Not shown), so that the left and right unit doors (82) (82) can be opened outward from the center to both sides. In addition, (88) is a wire net.

[0004] Thus, a double door (8
1) Conventionally, after closing the free ends of the left and right unit doors (82) and (82) close to each other, these unit doors (8)
2) A bar (83) rotatably mounted on one side of (82)
Is rotated in a plane parallel to both unit doors (82) and (82), and horizontally latched on a substantially horizontal U-shaped receiving bracket (84) provided on the other side, thereby closing the unit. It was locked. Here, (85) is the unit door (82) (8)
A substantially horizontal U-shaped bar mounting bracket integrally attached to one of the two parts by welding or the like, and (86) is a shaft bar of a bar (83).

[0005]

However, in such a conventional lock structure, the bar (83) is
The double door (81) is arranged in a direction orthogonal to the direction of the rotation axis of the unit doors (82) and (82) and the opening direction of the double door (81), and holds the double door (81) in a closed state by its own bending strength. Therefore, these unit doors (82) (8
If a relatively strong force is applied from the front or the rear from 2), the bar (83) may be deformed in the bending direction. Also, as shown in the figure, the left and right unit doors (82) (8)
In the case where the gap (87) exists in the closing portion of (2), when a force is applied to the unit doors (82) and (82) from the outside in a direction of bringing the free ends of the two close together, The force acts on the hinge member that rotatably supports the unit doors (82) (82), thereby deforming the hinge members, and as a result, the unit doors (82) (82) are likely to rattle. There was a disadvantage.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned difficulties, and even if a bar member is not easily deformed and a gap is present in a closing portion between left and right unit doors, each unit door is rattled. It is an object of the present invention to provide a double door lock structure that can be stably held for a long period of time without causing a problem.

[0007]

According to a first aspect of the present invention, there is provided a lock structure of a double door which opens and closes in a double-door manner, wherein a pair of unit doors constituting the double door are respectively provided with a pair of unit doors. The unit door stoppers each have a protrusion protruding toward the other unit door on the opening direction side of the double door, and these protrusions are provided in the opening direction of the other unit door. By contacting the front surface, the rotation of the other unit door in the opening direction is stopped.
Each bar member fitting portion is provided side by side on a straight line parallel to the direction of the rotation axis of the unit door, and the bar member is fitted into these bar member fitting portions in such a manner that the bar member communicates with the bar member fitting portion. It is characterized by being fitted freely.

In this configuration, since the pair of unit doors constituting the double door is provided with the stop member for the other unit door, each unit door is in the closed state of the double door.
It becomes difficult to open it one by one. And, in each of these unit door stopper members, a bar member fitting portion is provided side by side on a straight line parallel to the direction of the rotation axis of the unit door,
The bar member is fitted into these bar member fitting portions so as to be freely inserted into the bar member fitting portion in such a manner that the bar member fitting portions communicate with each other. Due to the presence of the bar member, the unit doors cannot be opened, and the closed state of the doors is maintained. Also, at this time, since the bar member is fitted in the bar member fitting portion arranged on a straight line parallel to the direction of the rotation axis of the unit door, it is arranged in a direction parallel to the direction of the rotation axis of the unit door, Due to its own shear strength, the double door is kept closed. Therefore, even when a relatively strong force is applied to both unit doors from the front or the rear,
The bar member hardly deforms. In addition, when a gap is present at the closing portion of the left and right unit doors, when a force is applied to each unit door from the outside in a direction in which both free ends are brought closer to each other or in a direction in which the free ends are separated from each other. However, a shearing force is applied to the bar member fitted in these bar member fitting portions, the bar member is hardly deformed, and the double door is held in a fixed state. Therefore, a large force does not act on the hinge member that rotatably supports each unit door, the hinge member is prevented from being deformed, and each unit door is stably held for a long time without rattling. Is done. Then, the lock of the double door is released by removing the bar member from the fitting portion.

According to a second aspect of the present invention, in the double door locking structure according to the first aspect, each of the bar member fitting portions is formed by a groove-shaped concave portion opened in the opening direction side of the double door, respectively. And one of the unit door stopper members is rotatably mounted on a shaft passing through each of the groove-shaped concave portions and the opening thereof.

In this configuration, the bar member pivotally mounted on one of the unit door stopper members is rotated toward the other unit door stopper member so that the bar member is fitted into the groove-shaped recess from the opening. By performing this operation in reverse, it is removed from the groove-shaped concave portion.

According to a third aspect of the present invention, in the double door lock structure according to the first or second aspect, each of the unit door stoppers is provided in a gap formed in a closing portion of the double door in the opening direction of the double door. And a swelling bulging portion bulging toward the free end side of the other unit door.

In this configuration, even if a force is applied to each unit door from the outside in a direction in which the free ends of the unit doors are brought closer to each other, the presence of the bar member and the bulging portion for fitting the gap exists. Accordingly, the movement of each unit door is prevented, and the double doors are more securely held in a fixed state.

According to a fourth aspect of the present invention, in the double door lock structure according to any one of the first to third aspects, each of the unit door stoppers is provided with one or more of the unit doors and two or more of the two unit doors.
One or more are provided, and these are arranged alternately and adjacently.

In this configuration, even when forces opposite to each other in the direction of the rotation axis are applied to the unit doors, the projecting portions of the unit door stop members collide with each other, and the unit doors are relatively displaced. To prevent that.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention in which a lock structure for a double door according to the present invention is applied to a double door provided on a front part of a container truck having a rectangular frame shape in plan view. This will be described with reference to FIG.

FIGS. 1 to 7 show an embodiment of a double door according to the present invention. In these figures,
(30) is a container trolley, and (31) is a double door provided on the front part thereof, which opens and closes like a double door.

As shown in FIG. 7A, the double doors (31) are two square unit doors (3) arranged side by side.
2) Consists of (32). Each unit door (32) (32)
Base end vertical frames (33b) each composed of a rectangular frame (33) (33) and located on the outside
(33b) is a support vertical frame (40) (40) provided at the left and right corners of the front of the container truck (30).
Are hingedly connected by hinge members (37), (37)..., Whereby the left and right unit doors (32) (32) can be opened outward from the center to both left and right sides. I have. That is, the unit doors (32) and (32) are respectively supported by the support vertical frames (40) and (4) extending vertically.
0) can be rotated about a rotation axis. (34) is a square side surface, (35) is a square back surface, (36) is a square bottom wall, (39) (39) ...
Is a caster.

The rectangular frame frames (33) (33) of the unit doors (32) (32) are made of extruded pipe-shaped aluminum (including the alloy thereof, the same applies hereinafter), and are shown in FIG. As shown in the figure, a concave ridge (33c) extending in the longitudinal direction at one circumferential position on the outer circumferential surface of the outer circumferential surface is formed in a circular shape.
(33c) is extruded. Then, wire meshes (38) (3) are inserted into these concave strips (33c) (33c).
8) The peripheral end of the rectangular frame is inserted (33)
(33) The inside is covered with a wire mesh.

The free end vertical frames (33a) (33) located at the free ends of the left and right unit doors (32) (32).
a) includes, as shown in FIGS. 1, 2 and 5, unit door stopper members (10) and (10) for respectively stopping the other unit door.
Two (10) are provided on the right unit door (32) and one is provided on the left unit door (32), and these three unit door stopper members (10), (10), (10) are free ends. The vertical frames (33a) (33a) are arranged alternately and adjacently in the length direction.

Each unit door stop member (10) (10) (1)
0) is a tubular portion (11) for attaching to the free end vertical frame (33a) of each unit door (32), and the tubular portion () on the opening direction side of the double door (31), that is, outside the container. 11) projecting toward the other unit door side from the peripheral surface of the other unit door, and the free end vertical frame (33) of the other unit door.
a) is fitted from the opening direction side of the double door (31) into the gap (A) formed in the projection (12) abutting on the front peripheral surface in the opening direction and the closing part of the double door (31);
A gap fitting bulging portion (13) bulging from the peripheral surface of the cylindrical portion (11) to the free end of the other unit door. And the free end vertical frame (33) of each unit door (32) (32) is attached to these cylindrical portions (11) (11) (11).
a) (33a) is passed.

These unit door stopper members (10) (10)
(10) is made of an extruded aluminum member, and as shown in FIG. 3 and FIG.
A convex ridge (11a) extending in the axial direction is integrally formed at one location in the circumferential direction on the inner peripheral surface of the inner circumferential shape,
The protruding ridge (11a) is fitted in the concave ridge (33c) of the free end vertical frame (33a) of the unit door (32), and is prevented from rotating by the free end vertical frame (33a). Held in state. Further, the uneven fitting portion (11a)
In (33c), a set screw (16) is screwed in from the side, and the tip of the set screw (16) is connected to the unit door (3).
2) The free end vertical frame (33a)
c), so that each unit door stop member (10) is connected to the free end vertical frame (3) of the unit door (32).
It is held in a fixed state at the middle position in the height direction 3a). In FIG. 3, (11b) (11b) (11b)
Are screw holes for the set screws (16), (16), (16).

Also, each unit door stopper member (10) (10)
The protruding portions (12), (12), (12) of (10) respectively extend in the direction substantially orthogonal to the rotation axis of the other unit door (32), (32), that is, in the horizontal direction. 32)
Of the free end vertical frame (33a) (33a). Each protruding portion (12) has a curved surface portion (12a) that is curved in accordance with the shape of the outer peripheral surface of the free end vertical frame (33a), and is provided when the double door (31) is closed. The curved surface portion (12a) is a free end vertical frame (33a) of the other unit door (32).
Then, the two doors (31) come into contact with each other from the opening direction, thereby stopping the rotation so as not to open the other unit door (32) alone.

Also, each unit door stop member (10) (10)
The bulges (13), (13), (1)
3) are U-shaped groove-shaped recesses (14a), (14a), (14) each of which opens on the side of the opening direction of the double door (31) and extends in a direction parallel to the direction of the rotation axis of the unit door (32).
The bar member fitting portion (14) (14) (14) comprising a)
Are integrally formed by extrusion. As shown in FIG. 1, these bar member fitting portions (14), (14), and (14) are connected to the unit door (32) when the double door (31) is closed.
Are arranged in such a manner that they are arranged on a vertical straight line parallel to the direction of the rotation axis. In FIGS. 3 and 4, (14c)
(14c) is an opening (14) of each groove-shaped recess (14a).
b) A guide surface portion for fitting a pair of bar members formed in a chamfered shape on the side.

Further, as shown in FIGS. 1 and 2, among the three unit door stopper members (10), (10), (10), the unit door stopper member (10) located at the uppermost position includes:
A thin, straight rod-shaped bar member (20) having rigidity is formed in a plane passing through groove-shaped recesses (14a) (14a) (14a) and openings (14b) (14b) (14b) arranged in a straight line. The shaft is mounted so that it can rotate. That is, as shown in FIG. 1, FIG. 3 and FIG.
A shaft rod insertion hole (2
0a) is provided, and the shaft rod (15) arranged in the direction orthogonal to the direction of the rotation axis of the unit door (32), that is, the horizontal shaft (15) is positioned at the uppermost position in the shaft rod insertion hole (20a). Is inserted in the groove-shaped recess (14a) of the unit door stopper member (10), thereby forming the groove-shaped recesses (14a) (14a) (1) in which the bar members (20) are vertically aligned as described above.
4a) and the opening (14b) (14b) (14b). In FIGS. 3 and 4, (13a) is a shaft rod insertion hole provided horizontally in the clearance fitting bulging portion (13) of the unit door stopper member (10) located at the uppermost position. (12b)
Is a semicircular arc-shaped shaft rod insertion notch provided at the tip of the protruding portion (12) of the unit door stopper member (10). Then, as shown in FIG. 4, a shaft rod (15) on which a bar member (20) is pivotally mounted is provided with a set screw (17) screwed in from the front.
Is held in a fixed state. In FIG.
(13b) is a screw hole for the set screw (17). The length of the bar member (20) is shown in FIGS.
As shown in the figure, groove-shaped recesses (14
a) (14a) It is set longer than the length of (14a).

In the lock structure of the double door (31) having the above structure, the left and right unit doors (32) and (32) are connected to the free end vertical frame (33) as shown in FIGS.
a) When the (33a) is close to each other and close to each other, two unit door stopper members (10) (10) (10) provided on the free end vertical frame (33a) of the right unit door (32). The projections (12) and (12) of (10) connect the curved surfaces (12a) and (12a) to the left unit door (32).
At the free end vertical frame (33a) of the double door (31)
The left unit door (32) is not opened by itself because it is in contact with the opening direction side of the unit door. At the same time, the unit door stop member (1) provided on the free end vertical frame (33a) of the left unit door (32).
0) has its curved surface (12a)
Free end vertical frame (33a) of unit door (32) on right side
In addition, the unit doors (32) on the right side are not opened alone because they are in contact with each other from the opening direction side of the double doors (31).

From this state, by rotating the bar member (20) downward from its free end, the bar member (20) is inserted into the groove-shaped concave portions (14a) (14a) (14a) arranged linearly. However, these groove-shaped concave portions (14a) (14a) (1
4a) so that the openings (14b) (1
4b) Fitted from (14b), this double door (3
The closed state of 1) is locked. At this time, the bar member (2
0) is a unit door (3) as shown in FIG. 1, FIG. 2 and FIG.
They are arranged in a direction parallel to the direction of the rotation axis of 2), that is, in a vertical direction.

In this locked state, the left and right unit doors (32) and (32) have the protruding portions (12) as described above.
(12) Since the doors are not opened one by one due to the operation of (12), the only way to open the double door (31) is to open both unit doors (32) and (32) at the same time. However, the left and right unit doors (32) (3
If you try to open 2), the right unit door stopper (1
0) and (10) the groove-shaped concave portions (14a) and (14a) move from the front to the right, while the unit door stopper member (10) on the left.
Because the groove-shaped concave portion (14a) moves from the front to the left,
Due to the presence of the bar member (20) fitted in these groove-shaped recesses (14a) (14a) (14a), the movement of such groove-shaped recesses (14a) (14a) (14a) in the left-right direction is prevented, The left and right unit doors (32) (32) are held in a closed state.

At this time, the bar member (20) is connected to the unit door (3).
Since the grooves are arranged in a direction parallel to the direction of the rotation axis of 2), that is, in the up-down direction, such groove-shaped recesses (14a) and (14)
a) The shear force is applied by the lateral movement of (14a). That is, the bar member (20) has a double door (3) due to the shear strength which is higher than the bending strength.
The closed state of 1) is maintained. Therefore, even when a relatively strong force is applied to the left and right unit doors (32) and (32) from the front or the rear, the bar member (20) hardly deforms and the double door (31) is closed. The state is maintained.

When a force is applied to the unit doors (32) and (32) from the outside in a direction in which the free end vertical frames (32a) and (32a) approach each other, the left and right unit doors (32 32) and (32) are trying to move toward the gap (A) formed between the free end vertical frames (33a) and (33a), and the right unit door stopper member (10).
The groove-shaped recesses (14a) of the unit door stopper member (10) on the left side move to the right while the groove-shaped recesses (14a) (14a) of (10) move to the left. The movement of the groove-shaped recesses (14a) (14a) (14a) is prevented by the presence of the bar member (20) fitted in the recesses (14a) (14a) (14a).
In addition, the bulging portions (13) and (13) for gap fitting which are fitted in the gap (A) of the closing portion of the double door (31).
Due to the presence of (13), such groove-shaped concave portions (14a)
(14a) The movement of (14a) is more strongly prevented. Similarly, even when a force is applied to the unit doors (32) and (32) from the outside in the direction in which the free end vertical frames (32a) and (32a) are separated from each other, these groove-shaped concave portions (14a) ( 14a) Due to the presence of the bar member (20) fitted in the (14a), the groove-shaped concave portions (14a) (14)
a) The movement of (14a) is prevented. Therefore, no large force acts on the hinge members (37) (27) that rotatably support the left and right unit doors (32) (32), and the hinge members (37) (37) can be prevented from being deformed. .

Further, each unit door stopper member (10) (10)
(10) One of both unit doors (32) and (32),
Since two are provided on the other side and these three are arranged alternately and adjacently, each unit door (32)
Even when the forces in the vertical direction are applied to (32) in opposite directions, the protrusions (12), (12), (12) of each unit door stopper member (10) (10) (10) always have the gap (A). The unit doors (32) and (32) do not relatively shift vertically.

On the other hand, when unlocking both unit doors, as shown by the dashed line in FIG.
(14a) The bar member (2) fitted in (14a)
0) is pivoted upward from its free end,
The bar member (20) has groove-shaped recesses (14a) (14a) (14).
Removed from a). Thereby, the lock is released.
Then, by opening the left and right unit doors (32) and (32) simultaneously, the double door (31) can be opened.

When the double door (31) is closed, as shown in FIG. 5, the left and right unit doors (32) (3)
2) at the same time, its free end vertical frame (33a)
(33a) By closing them so that they are close to each other, the protrusions (12), (12), (12) of the stopper members (10), (10), (10) of each unit door are respectively connected to the free end vertical frame ( 33a) (33a) is contacted from the opening direction side. At the same time, the stop members (10) (1)
0) (10) bulges for fitting gaps (13) (13)
(13) is also fitted in the gap (A) between the double doors (31). Then, as shown in FIG. 6, by rotating the bar member (20) downward from its free end, the bar member (2) is rotated.
0) is fitted into the groove-shaped recesses (14a), (14a) and (14a), and the closed state of the double door (31) is locked.

Although the embodiment of the present invention has been described above, the lock structure of the double door of the present invention is not limited to the above embodiment, and can be applied to other various double doors. . In addition, the present invention may be applied to a double door that opens and closes like a double door as in the above embodiment, or may be applied to a double door that opens inward or inward and outward.

[0034]

According to the first aspect of the present invention, in the first aspect, the pair of unit doors constituting the double door is provided with the stop member for the other unit door, respectively. The doors are hard to open one by one.
In each of these unit door stopper members, a bar member fitting portion is provided along a straight line parallel to the direction of the rotation axis of the unit door, and a bar member is fitted in these bar member fitting portions. The two unit doors can be opened due to the presence of the bar members fitted into these bar member insertion portions, even if the two unit doors are to be opened at the same time, since the two unit doors are fitted so as to be freely inserted into the form in which the connecting portions communicate with each other. Instead, the double doors can be kept closed. At this time, the bar member is
Since it is fitted into the bar member fitting part arranged on a straight line parallel to the direction of the rotation axis of the unit door, it is arranged in the direction parallel to the direction of the rotation axis of the unit door, and due to its own shear strength,
The closed state of the double door is maintained. Therefore, even when a relatively strong force is applied to the unit doors from the front or the rear, the bar member can hold the closed state of the double door firmly without being deformed substantially. In addition, when a gap is present in the closing portion of both unit doors, when a force is applied to each unit door from the outside in a direction in which both free ends are brought close to each other or in a direction in which both free ends are separated from each other. However, since a shearing force is applied to the bar member fitted in these bar member fitting portions, the bar member hardly deforms, and the double door is held in a fixed state. Therefore, a large force does not act on the hinge member that rotatably supports each unit door, the hinge member is prevented from being deformed, and each unit door is stably held for a long time without rattling. can do.

According to the second aspect, each of the bar member fitting portions is
Each of the double doors is formed of a groove-shaped concave portion opened on the opening direction side of the double door, and the bar member is provided on one of the unit door stopper members,
Since it is pivotally mounted so as to be rotatable in a plane passing through each of the groove-shaped concave portions and the opening thereof, a bar member pivotally mounted on one of the unit door stopper members is attached to the other unit door stopper member. By rotating the bar member toward the groove, the bar member can be fitted into the groove-shaped recess from the opening, and by performing this operation in reverse, the bar member can be removed from the groove-shaped recess. Therefore, the operation of inserting and removing the bar member is simplified, and locking and unlocking can be easily performed.

According to a third aspect, each of the unit door stopper members is
Each of the double doors has a swelling portion that is fitted into the gap formed in the closing portion of the double door from the opening direction side of the double door and bulges toward the free end side of the other unit door. In the case where there is a gap in the closing portion of each unit door, even when a force is applied to each unit door from the outside in a direction in which the free ends of both unit doors come close to each other, the bar member and this gap Due to the presence of the fitting bulging portion, the movement of each unit door is prevented, and the closed state of the double door can be held more firmly.

According to a fourth aspect, each of the unit door stopper members is
One or more of the two unit doors are provided and two or more of the other unit doors are provided, and these are arranged alternately and adjacently, so that forces opposite to each other in the direction of the rotation axis are applied to each unit door. Even when it is added, it is possible to prevent the projecting portions of the unit door stopper members from colliding with each other and the unit doors from being relatively displaced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a double door lock structure according to the present invention, showing a double door lock structure of a container truck.

FIG. 2 is a front view showing a lock structure of the double door.

FIG. 3 is a partially exploded perspective view showing a lock structure of the double door.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a partially cutaway perspective view showing an open state of a double door.

FIGS. 6A and 6B show a state in which the double door is closed and a bar member is being fitted, and FIG. 6A is a left side view thereof, and FIG. 6B is a right side view thereof.

7A and 7B show a container truck to which the lock structure is applied, wherein FIG. 7A is a front view, FIG. 7B is a side view, and FIG. 7C is a rear view.

FIG. 8 is a partially cutaway perspective view showing a conventional double door lock structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Unit door stop member 11 ... Cylindrical part 12 ... Projection part 13 ... Protrusion part for gap insertion 14 ... Barta member insertion part 14a ... Groove-shaped recessed part 14b ... Opening 31 ... Double door 32 ... Unit door 33a ... Play End vertical frame 33b Base proximal frame 37 Hinge member 40 Post vertical frame

Claims (4)

(57) [Claims] 1. A double door lock structure that opens and closes in a double door manner, wherein a pair of unit doors (32) and (32) constituting the double door are:
A stop member (10) (10) for the other unit door is provided, and each of the unit door stop members (10) (10) protrudes toward the other unit door in the opening direction of the double door. 12) (12) and these projections (12)
(12) stops rotation of the other unit door in the opening direction by abutting on the front surface in the opening direction of the other unit door. The member fitting portions (14) and (14) are provided side by side on a straight line parallel to the direction of the rotation axis of the unit door, and the bar member (20) is provided in these bar member fitting portions (14) and (14). A double door lock structure characterized in that it is fitted so as to be freely fitted in such a manner that these bar member fitting portions communicate with each other. 2. The bar member fitting portion (14) (14),
Groove recesses (14
a) (14a), wherein the bar member (20) is provided with the unit door stopper members (10) (1)
2. The double door according to claim 1, wherein one of the two slots is pivotally mounted on one of the grooves so as to be rotatable in a plane passing through the groove-shaped recesses (14a) and (14a) and the openings (14b) and (14b). Door lock structure. 3. The unit door stop member (10), (10),
A gap fitting bulge (13) which is fitted into the gap (A) formed in the closing part of the double door from the opening direction side of the double door and bulges to the free end side of the other unit door.
The double door lock structure according to claim 1 or 2, further comprising (13). 4. The unit door stop member (10) is provided at least one on one of the unit doors and at least two on the other of the unit doors, and these are arranged alternately and adjacently. The lock structure for a double door according to any one of claims 1 to 3.