JPH0242872Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a device for preventing the shutter door panel from coming off, which is attached to the rear of a freight vehicle or the like.

[Problems to be solved by the prior art and the invention] In general, shutter doors installed at the rear of freight vehicles, etc., are installed parallel to the ceiling without being rolled upwards to ensure a large effective opening area. A type that can be sent in and stored (referred to as an overhead type) is often used. The panels forming this overhead type shutter door are made of hollow aluminum extrusion, which is popular these days for its light weight.The male and female engaging parts provided on the upper and lower edges of these panels can be rotated together. A shutter door is formed by connecting one panel to the other. Conventionally, this connection has been done by inserting one panel into the other from the side, but this method is cumbersome to assemble. Moreover, it has the disadvantage of requiring a large amount of work space during assembly. By the way, in this type of shutter door, the bending angle between the panels is maximum at the curved corner of the guide rail, so if the panels are bent any further, the upper and lower panels can be engaged as they are with their joints butted against each other. Those that are made possible are adopted. However, in the case of the conventional shutter door mentioned above, when the vertical opening and closing operations are violently performed, an unreasonable force is applied between the panels at the curved part of the guide rail, and this causes the panels to bend together significantly and become vertically unstable. This has caused problems in that the upper and lower panels may become disengaged from each other, or the upper and lower panels may shift laterally to the extent that the roller pin is about to come off within the guide rail.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a shutter door panel detachment prevention device that can eliminate these drawbacks. A shutter door panel configured such that when the other panel is bent with respect to one panel by a predetermined angle or more, the corresponding engaging portions of both panels can be bent into male and female mating. The panel is characterized in that the panel is provided with a detachment prevention member that prevents detachment by regulating the bending angle of one panel with respect to the other panel to be below a predetermined angle that allows the male-female mating. It is something.

With this configuration, the present invention makes it possible to prevent the upper and lower panels from coming off at the curved portion of the guide rail even if the shutter door is roughly opened and closed, and also to prevent the panels from shifting laterally. This is what I did.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, A is the frame of a truck;
A ₁ is the rear upper frame, A ₂ is the rear vertical frame, and A ₃ is the ceiling frame. A hoisting device 8 for hoisting up the shutter door B via a wire rope 8c is attached to the left and right rear upper frames _A1 . A hoisting shaft 8a is installed between the hoisting devices 8, 8, and this hoisting shaft 8a
A hoisting drum 8b biased in the hoisting direction is provided, and the wire rope 8c is wound around the hoisting drum 8b.
The other end of the wire rope 8c is connected to the lowermost end of the shutter door B. A guide rail 7 is attached to the rear vertical frame _A2 and the ceiling frame _A3 via a bracket 7a and other aggregates, etc., and this guide rail 7 passes through the curved part of the middle part to the ceiling surface as shown in FIG. It is almost parallel to. 1 is an upper panel forming the shutter door B, and 2 is a lower panel. Upper and lower panels 1,
A roller pin 9 rotatably supporting a roller 9a is provided on both sides of the connection between the rollers 2 and 2. The shutter door B is opened and closed by a wire rope 8c being wound around a hoisting drum 8b and being rewound, whereby a roller 9a is guided by a guide rail 7 and moves vertically and horizontally. Upper and lower panels 1 and 2
have concave engaging portions 1a and U on opposing side edges, respectively.
A shaped engaging portion 2a is provided, and the concave engaging portion 1a is formed with an arcuate tip portion 1b which rotatably encompasses the U-shaped engaging portion 2a. An insertion groove 1c for the U-shaped engagement portion 2a is provided on the side. A guide groove 2b is formed outside the base of the U-shaped engaging portion 2a, in which the distal end portion 1b of the concave engaging portion 1a is rotationally guided. The upper and lower panels 1 and 2 are bent, for example, at about 70 degrees as shown in FIG.
are concatenated. 3 is a member for preventing the panel from coming off, and the member 3 is made up of plate pieces 3a and 3b that are bent at right angles to each other. One plate piece 3
There is a cutout groove 4 cut out from the lateral direction in the upper part of a, and a detachment prevention piece 5 is provided above the cutout groove 4. The upper edge of the other plate piece 3b is notched and is shorter than the plate piece 3a, and the notch forms a blocking side 6 as described later. Also, plate piece 3
A plurality of screw holes 3c are provided in the flat part of b, and this detachment prevention member 3 is made by applying corresponding plate pieces 3a and 3b to the side surface and back surface of the panel at the connecting ends of the panels 1 and 2, respectively. In this state, it is fixed to the panel 2 with the screw 10 through the screw hole 3c. At this time, one plate piece 3a is attached with the cutout groove 4 fitting over the roller pin 9, thereby supporting the concave engaging portion 1a of the panel 1 from the lateral direction and supporting the panel 1 against the panel 2. This will prevent lateral slippage. In addition, in the other plate piece 3b, the blocking edge 6 formed on the upper edge of the panel 1
The rotation (bending) angle in the front-rear direction relative to the panel 2 is prevented from exceeding a predetermined angle (for example, 65 degrees). The detachment prevention members 3 are provided at the connecting portions of both left and right ends of the panel.

In the embodiment of the present invention constructed as described above, the shutter door B, which is attached to the rear of a truck, etc., has both panels 1 and 2 bent at an angle of 70 degrees or more, and both engaging portions 1a and 2a are fitted into male and female parts. After fitting, the detachment prevention member 3 is fixed with screws, and necessary members such as the roller 9a are attached, thereby allowing assembly. In the shutter door B assembled in this manner, the detachment prevention member 3 prevents the male and female engagement portions 1a and 2b from coming loose even if the shutter door B is opened and closed roughly. That is, in a state where both panels 1 and 2 are assembled, the detachment prevention member 3 ensures that the rotation (bending) angle of the panel 1 with respect to the panel 2 is such that the release angle (fitting angle) of the male and female fitting portions is 70. Rotation will be restricted to prevent excessive rotation. Therefore, even if both panels 1 and 2 are bent significantly by rough opening/closing operations, they will not be bent more than 65 degrees, and there will be no possibility that the male and female fittings will come loose.

Moreover, in the detachment prevention member 3 of this embodiment, one plate piece 3a performs the function of preventing the panel 1 from slipping laterally, and therefore, the parts can be used for multiple purposes, which not only simplifies the structure. , it is convenient because the assembly work can be greatly simplified.

[Operations and Effects] In summary, since the present invention is constructed as described above, the rotation of one panel relative to the other panel is restricted before the bending angle is before the angle at which the male-female mating is released. Therefore, even if the shutter door is opened and closed roughly, the panel will not bend more than a predetermined angle at the curved part of the guide rail, and there is no chance of the panel coming off at the male-female mating part. This ensures reliable and smooth opening/closing operation at all times.

[Brief explanation of the drawing]

The drawings show an embodiment of the panel detachment prevention device according to the present invention, in which Fig. 1 is a front view of the shutter door, Fig. 2 is a side view of the upper part of the shutter door, and Fig. 3 is a cross section of the guide rail. 4A and 4B are perspective views of the panel connection portion, FIG. 5 is a perspective view of the panel detachment prevention device, and FIG. 6 is an explanatory view of the panel connection portion. In the figure, 1 is the upper panel, 1a is the concave engagement part, 1b
is the arcuate tip, 1c is the insertion groove, 2 is the lower panel,
2a is a U-shaped engagement part, 2b is a guide groove, 3 is a detachment prevention member, 3a and 3b are plate pieces, 3c is a hole, 4 is a notch groove, 5 is a detachment prevention piece, 6 is a blocking side, and 7 is a guide Rail, 7a is bracket, 8 is hoisting device, 8a is hoisting shaft, 8b is hoisting drum, 8c is wire rope, 9 is roller pin, 9a is roller, 10 is screw, A is body frame, A ₁ is rear The upper frame, _A2 is the rear vertical frame, _A3 is the ceiling frame, and B is the shutter door.

Claims (1)

[Scope of utility model registration request] Adjacent panels are configured so that male and female mating can be performed in a manner that allows bending of the corresponding engaging portions of both panels when the other panel is bent at a predetermined angle or more with respect to one panel. In the shutter door panel, the panel is provided with a detachment prevention member that prevents detachment by regulating the bending angle of one panel with respect to the other panel to a predetermined angle or less that allows the male-female mating. Features a device to prevent the shutter door panel from coming off.