JP2572357B2 - Auxiliary hinge device for open storage door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open storage type door for facilitating the opening / closing operation and storage operation of a door (hereinafter referred to as an open storage type door or simply a door) which can be stored forward when opened. The present invention relates to an auxiliary hinge device.

[0002]

2. Description of the Related Art As a door installed on the rear surface of a packing box of a box-shaped truck, a type in which two doors are opened in a double door type is widely used. 90
When the door is opened to an angle of 180 degrees or 180 degrees, the door itself protrudes greatly to the rear or left and right of the packing box, which may be extremely inconvenient in terms of handling the load and may hinder other traffic.

In order to solve this problem, the applicant fully opens the door at 90 degrees and pushes the door forward along the side surface of the packing box to store the door. Has proposed a door device that does not protrude to the rear or left and right of the packing box, and is extremely convenient for handling loads (Japanese Utility Model Publication No. 63-767).
No. 5). This is provided with an upper hinge and a lower hinge above the rear end of the door and below the front end, and by pivoting the guide roller on the swinging piece of the upper hinge and the fixed piece of the lower hinge, via the guide roller, The door when opened is supported to be able to move back and forth freely. The guide rollers on the upper hinge side and the lower hinge side roll along guide rails provided in the front-rear direction on the surface of the door and guide rails provided in the front-rear direction below the side surfaces of the packing box, respectively.

[0004]

According to the prior art, when the door is opened, the rear end of the door is lowered, and there is a problem that the operation of storing the door becomes unstable. That is, the guide roller that supports the door to be able to move back and forth needs to roll smoothly along the corresponding guide rail, and a predetermined gap is required between the guide rail and the door. This is because it is extremely difficult to correctly support the door via the upper hinge and the lower hinge when the door is opened at 90 degrees or the opened door is stored forward. In addition,
This problem is particularly noticeable when the weight of the door increases, and is not so important for a lightweight door.

Accordingly, an object of the present invention is to provide a support roller for supporting the door so as to be able to move back and forth in order to prevent the door from lowering when the door is opened.
It is an object of the present invention to provide an auxiliary hinge device of an open storage type door which can make opening / closing operation and storage operation of the door extremely light even with a heavy door.

[0006]

In order to achieve the above object, the present invention comprises a hinge pin mounted on a lower corner of a closed surface of a door, a swing lever swinging through 180 degrees or more via the hinge pin. And a support roller mounted upward at the end of the swing lever. The gist of the support roller is to support the door movably back and forth via a guide rail provided in the front and rear direction of the door.

[0007] The hinge pin can be disposed so as to coincide with the center of rotation of the door when fully closed.

[0008] Further, the supporting roller is provided with respect to the swing lever.
It may be mounted via a support rod, and the hinge pin includes
A connecting lever that swings integrally with the swing lever may be provided, and the connecting lever may be connected to a rail main body that is provided so as to be able to move back and forth corresponding to a guide roller provided at a lower hinge of the door.

[0009]

According to the structure of the present invention, the support roller can support the door movably back and forth through the guide rail provided in the front-rear direction of the door. It can be reliably supported via the roller and the swinging lever, and there is no possibility that the rear end will be inadvertently lowered during opening. The support roller is
The swing lever is attached to the tip of the swing lever, and is swingably attached to the closed surface of the door, that is, in the case of a box truck, at the lower corner of the rear surface of the packing box via a hinge pin. Therefore, the support roller can be pivoted in accordance with the rotation of the door via the swing lever, and can also be supported by pushing up the door from below via the guide rail. There is no risk of any trouble. Further, by swinging the swing lever 180 degrees or more, the support roller can be positioned at the rear end of the guide rail even when the door is opened and the whole is stored in the front. In addition, there is no possibility that the support roller may come off the guide rail.

If the hinge pin is made to coincide with the center of rotation of the door when fully closed, the swing lever and the support roller can swing and turn in accordance with the rotation of the door accurately.
The door can be opened and closed more smoothly. However, the hinge pin does not necessarily need to be exactly aligned with the center of rotation of the door. Since the door is supported rotatably and back and forth via hinges, guide rollers, guide rails, etc., the center of rotation of the door is strictly at one point due to the operating gap included in these members. It is not fixed.

When the support roller is mounted via the support rod, the height position of the guide rail attached to the door can be arbitrarily selected depending on the length of the support rod.

When a connecting lever that swings integrally with the swing lever is provided, the connecting lever is connected to the rail body and can open and close the door and simultaneously drive the rail body to a predetermined position. The opening and closing operation of the door and the storing operation can be further smoothly performed.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

The auxiliary hinge device 20 of the opening / closing storage type door includes a hinge pin 21, a swing lever 22 swinging via the hinge pin 21, and a swing lever 22 via the support rod 23.
And a support roller 24 attached to the tip of the guide rail device (FIGS. 1 and 2).
0, together with the lower hinge 40, used for opening / closing operation of the door D and storage operation. However, here, the box B of the box truck
Is an example in which the door D to be used is an open storage type door.

The door D, together with the other doors D, forms a double door that closes the opening B1 on the rear surface of the packing box B.
Each door D is supported by an upper upper hinge 30, a lower lower hinge 40, and an auxiliary hinge device 20, and after being fully opened at an angle of about 90 degrees from the fully closed position with respect to the opening B1, the load is loaded. It can be stored by pushing it forward along the side surface B2 of the box B.

Each door D includes a hook rod 51 and a locking member 5.
2 and 52, an upper guide rail 53 and a lower guide rail 54 are provided. The locking members 52, 52
The hooks B4, B4 formed on the rear pillar B3 of the packing box B form a detachable hinge. Also, guide rails 53 and 54
Are channel-shaped members each of which is open on the lower side,
The door D is attached to the front and rear direction. Note that the front end surface of the guide rail 54 is closed.

The upper hinge 30 includes a hinge pin 31 fixed above the rear end of the side surface B2 of the packing box B, and an L-shaped movable piece 32 rotatable about the hinge pin 31. A support rod 33 is rotatably mounted on the tip of the. The distal end of the support rod 33 is bent upward in a hook shape, and a guide roller 34 is attached thereto (FIG. 3). The guide roller 34 engages with the upper guide rail 53 from below to guide the support rod 33. It can roll back and forth along the rail 53.

The lower hinge 40 comprises a movable piece 42 and a fixed piece 43 which are connected to each other via a hinge pin 41 so as to be relatively rotatable (FIGS. 1 and 2). The movable piece 42 protrudes below the front end of the door D. A stopper 44 is attached to the movable piece 42, and the movable piece 42 and the fixed piece 43
Is limited by the stopper 44 so as not to exceed about 180 degrees.

The guide rail device 10 includes a rail body 11
And a pair of parallel links 12, 12 as main members.

The rail body 11 is a box-shaped member that is long in the front-rear direction of the packing box B, that is, in the direction in which the door D is stored, and whose outer side surface is open. The rail main body 11 is supported via a pair of parallel links 12 and 12 so as to be able to move back and forth.
One end of each of the parallel links 12, 12 is connected to a side surface of a chassis S on which the packing box B is mounted so as to be horizontally swingable. However, the other ends of the parallel links 12, 12 are swingably connected to the back surface of the rail body 11, and the rail body 1
The rear end face of 1 is closed by a lid plate 11a.

On the back side of the fixing piece 43 of the lower hinge 40,
A horizontal guide roller 45 is provided via a reinforcing plate 46.
a, 45a and vertical guide rollers 45b, 45b are mounted on the shaft (FIGS. 4 and 6). A group of guide rollers 4
5a, 45a, 45b, and 45b are stored in the rail main body 11 from below, and can roll back and forth in the rail main body 11. An engagement portion 47 formed by bending a plate material into a large wedge shape is provided on the rear surface of the fixing piece 43, and an L-shaped engagement rod 13 is provided on the parallel link 12 on the rear side. ing. The engagement portion 47 and the engagement rod 13 form a lock mechanism that prevents the lower hinge 40 from moving forward and backward by engaging with each other above the rail body 11 when the door D is pulled out to the retreat limit. (FIG. 6).

The hinge pin 21 of the auxiliary hinge device 20
It is attached to the rear surface of the packing box B, that is, the lower corner of the closed surface of the door D (FIGS. 1 and 2).

At the tip of the swing lever 22, a support rod 2
3 is protruded upward, and at the upper end of the support rod 23, a caster-shaped support roller 24 that is rotatable with respect to the support rod 23 is mounted upward (FIG. 5). The support rod 23 is screw-coupled to the swing lever 22,
Therefore, the height of the support roller 24 is adjustable. Further, the support roller 24 is engaged with the guide rail 54 below the door D from below and rolls along the guide rail 54 so that the door D can be moved back and forth through the guide rail 54. Can be supported.

The hinge pin 21 is provided with a connecting lever 25 that swings integrally with the swing lever 22.
One end of a rectangular connection piece 26 having a long hole 26a is rotatably connected to the tip of the connection lever 25 (FIGS. 1, 2, and 6). A pin 11b projecting from the lower surface of the rear end of the rail body 11 is engaged. Thus, the connecting piece 26 controls the rotational movement of the door D via the support rod 23 and the swing lever
, And can be transmitted to the rail body 11.

The entire weight of the door D is supported by the upper hinge 30, the lower hinge 40, and the auxiliary hinge device 20. Further, between the door D and the upper hinge 30, the lower hinge 40, and the auxiliary hinge device 20, the upper guide rail 53 and the guide roller 34, the rail body 11 and the guide roller 45a, respectively.
The combination of the guide rails 45a, 45b, 45b, the lower guide rail 54, and the support roller 24 forms a mechanism for moving the door D back and forth. Therefore, the door D can be opened and closed by rotating the door D with respect to the rear surface of the packing box B via the upper hinge 30 and the lower hinge 40, and by moving the door D back and forth along the side surface B2 of the packing box B. It can be stored forward.

Now, consider the case where the door D is fully closed with respect to the rear surface of the packing box B (FIG. 6). At this time, the door D seals the space between the rear column B3 of the packing box B and the opening B of the packing box B via a sealing rubber SR having a H-shaped cross section mounted on the front end surface thereof.
1 is completely closed. Also, the lower hinge 40
Is in a state of being pulled out to the limit of retreat so that the door D can be rotated so as to go around the rear pillar B3. On the other hand, the parallel link 1 supporting the rail body 11
2 and 12 are swinging rearward, and the engaging portion 47 of the lower hinge 40 and the engaging rod 13 of the rear parallel link 12 are deeply engaged with each other to restrain the lower hinge 40 to the retreat limit. I have. At this time, the hinge pin 41 of the lower hinge 40
Is substantially coaxial with the hinge pin 21 of the auxiliary hinge device 20. That is, the hinge pin 21 is disposed substantially coincident with the center of rotation of the door D when fully closed.

When the door D is opened from the fully closed state, the door D
Is rotated by the upper hinge 30 and the lower hinge 40 (FIG. 7). At this time, the swinging lever 22 and the connecting lever 25 of the auxiliary hinge device 20 also rotate around the hinge pin 21 with the rotation of the door D, and the connecting piece 26 is moved rearward of the packing box B by the rotation of the connecting lever 25. Drawn to. However, since the connecting piece 26 is connected to the rail main body 11 through the elongated hole 26a, no force is transmitted to the rail main body 11. Further, since the lock mechanism including the engagement portion 47 and the engagement rod 13 is maintained in the engaged state, the position of the lower hinge 40 is also maintained immovably.

When the door D is opened to about 90 degrees, the connecting lever 25 crosses over its dead center (the position where the connecting lever 25 stands upright with respect to the rear surface of the packing box B, the same applies hereinafter) (FIG. 2). 8). On the other hand, at this time, a part of the force for opening the door D is transmitted through the movable piece 42, the hinge pin 41, and the fixed piece 43 to the whole of the lower hinge 40 in the front outward direction of the packing box B (in the direction of arrow K1 in FIG. ). For this reason, the engaging portion 47 is pressed against the engaging rod 13, and therefore, the parallel link 12 is swung forward (in the direction of arrow K2 in the figure). On the other hand, since the rail main body 11 is connected to and supported by the distal ends of the parallel links 12, 12, the parallel links 12, 12 swing forward, thereby protruding outside the packing box B, and Start the forward movement along B.

Subsequently, when the door D is fully opened at about 90 degrees and a force is applied in a direction of pushing the door D forward,
The parallel links 12 and 12 swing further forward, and the lock mechanism including the engaging portion 47 and the engaging rod 13 is completely released (FIG. 9). On the other hand, at this time, the lower hinge 4
0, the relative angle between the movable piece 43 and the fixed piece 42 is the maximum angle determined by the stopper 44.
Since the lock mechanism is released and the lower hinge 40 can move back and forth, the door D can be freely moved forward by the guide rollers 45a, 45a, 45b and 45b rolling inside the rail body 11. (Arrow K3 in the figure). In addition, the rail main body 11 has parallel links 12 and 1.
Due to the swing of 2, the door D completely projects from the side surface B2 of the packing box B, so that the door D does not contact the side surface B2 during forward movement.

Subsequently, when the door D is further pushed forward, the parallel links 12, 12 assume the upright position, which is the swing limit thereof (FIG. 10), so that the rail main body 11 maintains the immobile position thereafter. . Then, if the door D is further pushed forward, the entire width of the door D is stored forward along the side surface B2 of the packing box B, and the opening operation and the storing operation can be completed (FIG. 1). At this time, the rear end of the door D is connected to the swing lever 22 of the auxiliary hinge device 20, the support rod 23,
Since it is supported by the caster-type support rollers 24, even if the door D is heavy, the rear end of the door D will not be inadvertently lowered. At this time, the swing lever 22 and the connecting lever 25 are connected to the common hinge pin 2.
6, it swings 180 degrees or more from the fully closed state of the door D in FIG. 6.

To close the door D in the housed state, first, the door D is pulled out to the rear of the packing box B. At this time, the rail main body 11 includes the guide rollers 45a, 45a, 45b, 45
Until any one of the members b contacts the lid plate 11a at the rear end of the rail main body 11, the door D can be pulled out rearward only (FIG. 10).

Thereafter, when the door D is further pulled backward, the parallel links 12, 12 swing backward, and the rail body 11 moves backward and approaches the packing box B (FIG. 9).
At the same time, the swing lever 22 and the connecting lever 25 of the auxiliary hinge device 20 also swing through the hinge pin 21 when the swing lever 22 is pulled by the door D, and the connecting piece 26
After moving backward, the front end of the elongated hole 26a comes into contact with the pin 11b of the rail main body 11 (FIG. 8). On the other hand,
The lock mechanism including the engagement portion 47 and the engagement rod 13 includes:
That the lower hinge 40 is at the retreat limit,
12 is in a half-engaged state by swinging backward.

When the door D is pulled out to the retreat limit as described above and is rotated in the closing direction, the swing lever 22
Swings toward the rear surface of the packing box by the rotational movement of the door D, whereby the connecting lever 25 also swings in the same direction.
Since the swinging motion of the connecting lever 25 is transmitted to the rail main body 11 via the connecting piece 26, the rail main body 11 is strongly pulled to the retreat limit by the swinging of the connecting lever 25 beyond the dead center. And is attracted to the side surface B2 of the packing box B, thereby completing the engagement of the lock mechanism (FIG. 7).

When the lock mechanism is engaged, the lower hinge 40 is thereafter restrained to the retreat limit, so that the door D smoothly moves to the fully closed state around the lower hinge 40 and the upper upper hinge 30. And can be closed to the fully closed state (FIG. 6).

As described above, a series of connecting mechanisms including the swinging lever 22, the connecting lever 25, and the connecting piece 26 provide the door D near the fully opened position especially when the door D is closed.
Is transmitted to the rail body 11 and the rail body 11
At the other rotation position of the door D, and exerts no force on the rail body 11 due to the long hole 26a. So, for door D,
When the backward pulling motion and the closing rotational motion are continuously performed, the parallel links 12 and 12 swing, thereby pulling the rail body 11 toward the packing box B side. It works to close the door D with a kind of momentum, and the movement of the door D during this time is extremely light. Also,
The same applies to the case where the door D is opened and then the door D is stored forward, and in this case, the rotational force in the opening direction of the door D is applied to both the door D and the rail body 11. On the other hand, the momentum is applied in a direction away from the packing box B.

Accordingly, the rotational movement for opening and closing the door D and the forward and backward movement for storing and drawing out the door D are performed during the opening operation.
In any case at the time of the closing operation, it can be extremely smoothly and lightly continued. Further, the swing lever 22 swings by 180 degrees or more through the hinge pin 21 so that the support roller 24 can be moved to the guide rail 54 even when the door D is opened and the entirety is stored forward. The door D can be positioned at the rear end (FIGS. 1 and 2), and the door D can be stably supported via the support roller 24 during the entire opening / closing operation and storage operation of the door D.

It should be noted that the present invention relates to a box-type truck packing box B.
The present invention can be applied to any open storage type door such as a rocker, various buildings, and mechanical devices without being limited to the door D used for the above.

[0038]

As described above, according to the present invention, the swing lever mounted on the lower corner of the closed surface of the door via the hinge pin and the support roller mounted on the tip of the swing lever are provided. With this, the support roller can support the door so as to be able to move back and forth via the guide rail attached to the door, so that even if the door is heavy, the rear end of the door can be opened. Without going down,
The opening and closing operation and the storing operation can be performed very lightly, and the swing lever swings according to the rotation of the door. Therefore, there is no danger that the rotation movement for opening and closing the door will be disturbed. is there.

[Brief description of the drawings]

FIG. 1 is an explanatory perspective view of the overall configuration.

FIG. 2 is a view of an essential part X in FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line YY of FIG. 1;

FIG. 5 is an enlarged side view of a main part of FIG. 1;

FIG. 6 is an explanatory diagram of an operation sequence (1).

FIG. 7 is an explanatory diagram of an operation sequence (2).

FIG. 8 is an explanatory diagram of an operation sequence (3).

FIG. 9 is an explanatory diagram of an operation sequence (4).

FIG. 10 is an explanatory diagram of an operation sequence (5).

[Explanation of symbols]

 D ... Door 11 ... Rail body 20 ... Auxiliary hinge device 21 ... Hinge pin 22 ... Swing lever 23 ... Support rod 24 ... Support roller 25 ... Connection lever 40 ... Lower hinge 45a, 45b ... Guide roller 54 ... Guide rail

Claims (4)

(57) [Claims] 1. A hinge pin mounted on a lower corner portion of a closing surface of a door, a rocking lever that rocks by 180 degrees or more via the hinge pin, and a support roller mounted upward at a tip of the rocking lever. An auxiliary hinge device for an open storage door, wherein the support roller supports the door movably back and forth via a guide rail attached to the front and rear direction of the door. 2. The hinge pin according to claim 1, wherein the hinge pin coincides with the center of rotation of the door when fully closed.
An auxiliary hinge device for an open storage door as described in the above. 3. The auxiliary hinge device according to claim 1, wherein the support roller is mounted on the swing lever via a support rod. 4. The hinge pin is provided with a connecting lever that swings integrally with the swing lever, and the connecting lever includes:
The auxiliary hinge device for an open storage door according to any one of claims 1 to 3, wherein the auxiliary hinge device is connected to a rail main body arranged to be movable back and forth corresponding to a guide roller attached to a lower hinge of the door. .