JPH0747595Y2 - Overhead door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to an overhead door and prevents the door panel from falling.

(Prior Art) Conventionally, as an overhead door of this type, for example,
As described in Japanese Utility Model Laid-Open No. 62-103989, when the rope that raises the door panel is cut and the tension of the rope disappears, the rope break detection wire loosens and the door panel latch activates the latch. It is known that the restoring force of the spring prevents the door panel from falling by inserting it into the latch receiving hole of the guide rail.

(Problems to be Solved by the Invention) The structure described in the above publication is preferable in that the door panel can be prevented from falling when the rope for raising the door panel is cut. In addition, since the number of parts is large and the structure is complicated, it is necessary to form these mutually and to assemble them so that the latch can be accurately inserted into each latch receiving hole of the guide rail in an emergency. Takes the trouble of
Therefore, there are problems in parts management and cost.

Therefore, the present invention has been made in view of such a problem, and it is possible to reliably prevent the door panel from dropping when the wire is cut by a simple structure with a small number of parts. Therefore, in terms of parts management and cost. It is an object of the present invention to provide an overhead door that is highly preferable and has high safety in the event of an unexpected situation.

(Means for Solving the Problems) The overhead door of the present invention comprises a guide rail that is erected opposite to each other on the left and right sides, and a shaft frame that is rotatable between the left and right guide rails with a vertical interval left and right. And a door panel that is vertically movable through a number of guide rollers that engage with the left and right guide rails and that is vertically moved by a wire, and the left and right guide rails are rotated in the vertical direction at predetermined intervals in the vertical direction. A plurality of stopper bodies that are movably supported and that protrude and retract with respect to the roller hoistway where each of the left and right guide rollers ascends and descends, and fixed to the lower end portions of the left and right wires that raise and lower the door panel, when the door panel descends. Before lowering the guide roller at the lowermost end, the left and right stopper bodies are pivotally retracted from the roller hoistway and left and right when the door panel is raised. After the guide roller at the lowermost end is lifted, the actuating body for pivotally projecting the left and right stopper bodies into the roller hoistway is provided.

(Operation) In the overhead door of the present invention, when the left and right wires are unwound, the door panels are lowered by the left and right wires along the left and right guide rails via the left, right, upper and lower guide rollers. The left and right wires are unwound, and the respective stopper bodies are pushed by the left and right actuating bodies before the respective left and right guide rollers of the door panel are lowered, and the respective stopper bodies are pivotally retracted from the respective roller hoistways. Therefore, since the left and right stopper bodies are pivotally retracted from the roller hoistway by the left and right actuating bodies in advance, the door panel is smoothly lowered along the left and right guide rails.

Next, when the left and right wires are wound up, the door panel is lifted by the left and right wires along the left and right guide rails via the respective left and right and upper and lower guide rollers,
In this case, the left and right actuating bodies that are pulled up by the left and right wires sequentially push the left and right stopper bodies after the guide rollers at the left and right lower end portions are lifted, and the stopper bodies are moved into the respective roller hoistways. It is pivotally projected, and the left and right roller hoistways are closed by the left and right stopper bodies.

Therefore, during or after the rise of the door panel,
When the left and right wires are cut, the left and right guide rollers of the door panel are received by the stopper bodies of the actuating bodies that are pivotally projected into the roller hoistway by the left and right actuating bodies, and the door panels are prevented from falling.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

Reference numeral 1 is a guide rail that is erected upright to the left and right, and the left and right guide rails 1 extend upward and rearward from a vertical portion 2 and an upper end portion of the vertical portion 2 via a curved portion. And a horizontal portion (not shown), and the left and right vertical portions 2
And a series of roller hoistways 3 that are open in the horizontal part facing each other.
Are formed respectively. Further, the left and right guide rails 1 are fixed to the wall surface portions 6 of the support member 5 via the support frames 4, respectively, and the rear end portions of the left and right guide rails 1 are provided at the rear end portions of the left and right support frames 4. The frame plate 8 that is spaced apart from and opposed to each other is bent and formed.

Further, a large number of long guide grooves 9 extending in the vertical direction at predetermined intervals in the vertical direction penetrate through the roller hoistway 3 at intermediate portions in the width direction of the rear plate portions 7 of the left and right guide rails 1, respectively. A pair of bearing pieces 10 are laterally opposed to the left and right upper and lower upper guide grooves 9 at the lower rear edge of the guide groove, respectively, and project toward the rear. Further, the roller hoistway 3 is provided between the pair of left and right bearing pieces 10 via a support shaft 11.
The stopper bodies 12 protruding and retracting with respect to each other are rotatably supported in the vertical direction.

Each stopper body 12 has an insertion hole through which the support shaft 11 is inserted.
There is a main body 14 in which a first locking surface 15a is formed in the front portion of the main body 14 and is wider than the guide long groove 9 and abuts against the opening side edge of the guide long groove 9. At the same time, a second locking surface 15b is formed at the rear of the main body 14 so as to be continuous with the lower end of the first locking surface 15a. Further, a triangular stopper 16 projecting from the guide groove 9 into and out of the roller hoistway 3 is provided at an intermediate portion in the width direction of the first engaging surface 15a. A locking surface 17 is formed, and a guide surface 18 that is inclined rearward and downward is formed on the lower portion thereof. Further, an engagement step portion 20 and an engagement protrusion 21 are formed on the rear side of the main body 14 above and below the concave portion 19, respectively.

Next, a door panel 33 is provided between the left and right guide rails 1 so as to be able to rise through a large number of guide rollers 22 engaged with the left and right guide rails 1 and rotatably mounted vertically and vertically.

The door panel 23 stacks a large number of panel elements 24 in the vertical direction, and the panel elements 24 are rotatably connected between the left and right upper and lower ends via hinges 25, respectively. The guide rollers 22 that move up and down in the roller hoistways 3 of the left and right guide rails 1 are rotatably mounted on the respective hinges 25 via roller shafts 26.
A bearing body 28 is fixed to the lower portion of the vertical frame 27 attached to the left and right ends of the panel element 24 at the lowermost end via a mounting frame 30, and a roller shaft 29 is attached to the left and right bearing bodies 28. The guide roller 22 that moves up and down in the roller hoistway 3 of the left and right guide rails 1 is rotatably mounted on the shaft.

Further, the wire 3 is attached to the locking metal fittings 30a of the left and right mounting frames 30.
The lower ends of 1 are connected, and the upper ends of the left and right wires 31 are fixed to the winding drums 33 at both ends of the horizontal winding shaft 32. The left and right winding shafts 32 are connected to the left and right guides. Rail 1
The bearings 34 are rotatably mounted on the left and right bearing bodies 34 disposed above the vertical portion 2. The winding shaft 32 is urged in the wire winding direction by a spring 35 provided in the middle portion.

Next, in the vicinity of the lower ends of the left and right wires 31, the space between the rear plate portion 7 of the guide rail 1 and the frame plate 8 of the support frame 4 is vertically moved, and Actuators 37 that rotate the stopper bodies 12 in and out of the roller hoistway 3 are integrally fixed.
The left and right actuating bodies 37 are formed by extending vertically with a rod-shaped member, and have a vertical support portion 39 fixed to the lower end vicinity portion of the wire 31 with a clip 38 at the upper end portion thereof. An operating portion 40 for pushing the upper and lower engaging step portions 20 and the engaging protrusions 21 of the rear portion of the stopper body 12 is bent and formed in a substantially right angle shape at its lower end portion, and the operating portion 40 is formed by the bearing body. 28
It is formed at a position protruding downward from the position of the guide roller 22 attached to.

Next, the operation of the above embodiment will be described.

When the space between the left and right guide rails 1 is closed, the left and right wires 31 are unwound by the left and right winding drums 33, and the door panel 23 is rolled by the left and right upper and lower guide rollers 22 by the rollers of the left and right guide rails 1. Although it is lowered along the hoistway 3, in this case, when the left and right wires 31 are rewound, the door panel 23 is operated by the operating portions 40 of the left and right operating bodies 37.
Left and right guide rollers in the panel element 24 at the bottom end of the
Before the roller 22 descends along the roller hoistway 3, the engaging protrusions 21 of the left and right stopper bodies 12 are pushed downward. The left and right stopper bodies 12 are rotated around the support shaft 11 toward the inside of the space 36, and are guided by the long guide grooves 9 to be rotated and retracted from the roller hoistway 3.

Then, as shown in FIG. 4, the left and right stopper bodies 12
The second locking surface 15b of the abuts against the rear surface plate portion 7 and is stably held. Therefore, the stopper bodies 12 immediately before the respective lowermost guide rollers 22 on the left and right sides of the door panel 23 are descended by the actuating body 37 from the roller hoistway 3 in order, and the door panels 23 are left and right. Smoothly descends along.

Next, when opening between the left and right guide rails 1,
The left and right wires 31 are wound up by the winding drum 13, and the left and right wires 31 are used by the door panel 23.
Is raised along the left and right guide rails 1 via the respective left and right upper and lower guide rollers 22, and in this case, the actuating portion 40 of the left and right actuating body 37 that is pulled up by the left and right wires 31.
As a result, the engaging stepped portions 20 of the left and right stopper bodies 12 immediately after the left and right guide rollers 22 of the panel element 24 at the lowermost end are lifted are pushed upward.

The left and right stopper bodies 12 are advanced and rotated around the support shaft 11 toward the roller hoistway 3, and are guided by the respective guide long grooves 9 so as to be guided to the roller hoistway 3.
It is projected to rotate inward. Then, as shown in FIG.
The first locking surfaces 15a of the left and right stopper bodies 12 are the guide long grooves 9
It is stably held by engaging with the opening side edge of the. Therefore,
Left and right stopper bodies that are rotated and projected by the left and right actuators 37
The left and right roller hoistways 3 immediately after the left and right guide rollers 22 of the panel element 24 at the lowermost end are lifted by 12 are sequentially closed.

Next, during or after the rise of the door panel 23, the left and right wires 31 are cut, or when the left and right wires 31 are disengaged from the respective winding drums 33, the left and right ends of the lowermost end of the door panel 23 are removed. The guide rollers 22 are received by the left and right stopper bodies 12 pivotally projected into the left and right roller hoistways 3 immediately after passing the left and right guide rollers 22, and the door panel 23 is prevented from falling.

(Effects of the Invention) According to the present invention, a plurality of stopper bodies protruding and retracting from the left and right upper and lower guide rails of the door panel with respect to the roller hoistway of the door panel are vertically rotatably mounted on the upper and lower portions of the left and right guide rails. At the same time, the actuators for rotating the stoppers are fixed to the lower ends of the left and right wires for raising and lowering the door panel. The left and right stopper bodies can be reliably swung out of the roller hoistway by the body, so that the door panel can be smoothly lowered. Further, when the door panel is raised, the left and right stopper rollers can be reliably rotated and projected into the roller hoistway by the left and right actuating bodies after the left and right lowermost guide rollers are raised. The left and right roller hoistways can be sequentially closed by the body so that the left and right lowermost guide rollers can be reliably locked by the respective stoppers. Therefore, it is possible to reliably prevent the door panel from dropping when the wire is cut by a simple structure with a small number of parts, which is preferable in terms of parts management and cost, and has high safety overhead in the event of an unexpected situation. A door can be provided.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an exploded perspective view showing a main part of an overhead door with a part cut away.
The figure is a transverse cross-sectional view of a part of the same as above, FIG. 3 and FIG. 4 are explanatory views of the operation of the stopper body, and FIG. 5 is a front view of the overhead door. 1 ... Guide rail, 3 ... Roller hoistway, 12 ... Stopper body, 22 ... Guide roller, 23 ... Door panel, 31
…… Wire, 37 …… Actuator.

Claims (1)

[Scope of utility model registration request] 1. A guide rail standing upright relative to the left and right, and a large number of left and right guide rails rotatably mounted on the left and right guide rails at intervals in the vertical direction and engaged with the left and right guide rails. A door panel that is vertically movable through a guide roller and is vertically moved by a wire, and a left and right guide rails that are vertically rotatably mounted on the left and right guide rails at predetermined intervals in the vertical direction. A plurality of stopper bodies protruding and retracting with respect to the roller hoistway for raising and lowering the rollers and the lower end portions of the left and right wires for raising and lowering the door panel are secured to the lower end portions of the left and right guide rollers before the lowering of the guide rollers. The left and right stopper bodies are pivotally retracted from the roller hoistway, and when the door panels are raised, the guide rollers at the left and right lower end portions are raised and then the rollers are moved. Overhead door is characterized in that each stopper member of the right and left descending path comprises an actuating member for rotating protrusion, the.