JPH0538278U - Spring hoisting device for overhead doors - Google Patents

Abstract

(57) [Summary] [Purpose] In a panel that constitutes an overhead door, it is possible to easily and quickly apply a twisting force to the balance spring 6, and the number of members is small and the structure is simple and provided at a low price. To do. [Structure] A hoisting shaft 3, a balance spring 6 having one end fixed, and tightening in which end projections 8b, 8b are formed with an appropriate angular difference in the circumferential direction from both ends of a tightening coil portion 8a. The body 8 and an adjusting tool A ₁ having a through hole 10 capable of accommodating the tightening body 8 and an adjusting groove 11 are configured. The tightening body 8 and the adjusting tool A ₁ are provided on the hoisting shaft 3 so that they can rotate and can be locked to each other. The tightening body 8 locked to the other end of the balance spring 6 can be expanded and contracted by appropriately rotating the adjusting tool A ₁ .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spool hoisting device for an overhead door that can easily and quickly apply a twisting force to a balance spring in a panel constituting an overhead door.

[0002]

[Prior Art]

 An overhead door is a mechanism that allows multiple panels to be fed horizontally or vertically along the ceiling or wall through the guide rails provided on both sides of the panels for storage. Although it is done in the field, since a wiping plug is usually used, a spring is wound with a steel rod, and while holding down the rod, it is fixed with a turning screw.

[0003]

[Problems to be solved by the device]

 With the above structure, a special tool is required to apply the twisting force to the balance spring, and it is also necessary to prevent the winding screw from stopping while fixing the winding plug to the shaft. The plug had to be fixed, and the work was difficult and dangerous.

[0004]

[Means for Solving the Problems]

 Therefore, as a result of earnest and repeated research to solve the above problems, the inventor has found that the inventor can use the hoisting shaft, the balance spring with one end fixed, and the tightening coil part in the circumferential direction from both ends appropriately. It consists of a tightening body that has an end projection with an angular difference of 2 and an adjusting tool that has a through hole and an adjustment groove that can accommodate the tightening body. It is possible to rotate the attachment body and the adjusting tool and to lock adjacent ones so that the tightening body locked to the other end of the balance spring can be expanded and contracted by proper rotation of the adjustment tool. By using the spring hoisting device for overhead type doors, it is possible to easily adjust the balance spring of the panel for overhead type doors, and it is also possible for a single worker to solve the above problems. is there.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

In the overhead door, as shown in FIG. 1, a plurality of panels correspond to slats that constitute a shutter curtain of a general shutter, and each panel 1, 1, ... Is a guide rail. It is configured to be stored along the ceiling or wall via 2 and 2.

Each panel 1, 1, ... Is provided with a roller, and is raised and lowered along the guide rail 2 by the roller. As shown in FIG. 1, ... Is performed by wire drums 4 and 4 provided at both ends in the axial longitudinal direction of the hoisting shaft 3 and wire ropes 5 and 5 wound around the wire drums 4 and 4. The lower end of the wire rope 5 is fixed to the panel 1, and the wire drums 4, 4 rotate together with the hoisting shaft 3 to open and close the panels 1, 1, ....

Further, the hoisting shaft 3 is provided with a balance spring 6 and an elastic adjusting tool A for giving a twisting force to give the balance spring 6 an elastic reaction force. , The transmission body 7, the adjusting tool A ₁ and the tightening body 8. The transmission body 7 is formed in a disc shape as shown in FIG. 7a is formed, a fixing portion 7b for the balance spring 6 is formed on the other surface side, and a through hole 7c is formed in the central portion so that the hoisting shaft 3 can be inserted.

The tightening body 8 is formed in a coil spring type shape. As shown in FIGS. 3 and 4, the end protrusions 8b and 8b are provided on both sides of the coil-shaped tightening coil portion 8a. They are formed with an appropriate angle difference from each other. Specifically, the tightening body 8 is formed by winding a steel wire in a coil shape, and at the end of the coil-shaped tightening body 8. Is a steel wire forming the coil-shaped tightening body 8 which is extended substantially linearly outward to form end projections 8b and 8b. As shown in FIGS. The end projections 8b, 8b are formed in a state in which they are open in the circumferential direction of the coil-shaped tightening body 8.

The tightening force of the tightening coil portion 8a of the tightening body 8 is strengthened or loosened by the rotation of the end protrusions 8b, 8b. Specifically, as shown in FIG. As shown in (a) and (b), etc., when the two end projections 8b, 8b are brought close to each other in the circumferential direction, the inner diameter of the tightening body 8 is slightly expanded and the tightening force is weakened. When the protrusions 8b and 8b are operated so as to be separated from each other in the circumferential direction, the diameter of the tightening body 8 becomes small and the tightening force of the tightening body 8 becomes strong.

The hoisting shaft 3 penetrates into the tightening coil portion 8a, and as shown in FIGS. 3 and 4, the tightening coil portion 8a always applies an extremely strong tightening force to the hoisting shaft 3. By holding the end projections 8b, 8b close to each other by holding them so that they cannot rotate idly, the tightening force of the tightening coil part 8a is weakened, and the hoisting shaft 3 and the tightening body 8 can rotate idly. It is supposed to be.

As shown in FIG. 4, the adjusting tool A ₁ has a through hole 10 formed at the center of the grip portion 9, and a concave adjusting groove 11 is formed at an appropriate position on the inner peripheral surface of the through hole 10. One surface of the opposing wall surfaces of the adjusting groove 11 is formed as a winding pressing surface 11a, and the other surface is formed as a winding pressing surface 11b.

The grip portion 9 of the adjusting tool A ₁ is formed in a hexagonal cylinder shape as shown in FIG. 5, or is formed in a cylindrical shape having two flat surfaces facing each other as shown in FIG. It has a shape that is easy to grip with tools such as spanners and wrenches.

Further, as shown in FIGS. 3 to 5, the through hole 10 is formed to have a diameter such that the tightening coil portion 8 a of the tightening body 8 can be loosely inserted, and the through hole 10 is formed in the through hole 10. When the tightening coil portion 8a of the tightening body 8 is provided, an appropriate gap is formed between the tightening coil portion 8a and the inner surface of the through hole 10, as shown in FIG.

As shown in FIGS. 4 and 5, the adjustment groove 11 is a fan-shaped groove formed at an appropriate position on the inner peripheral surface of the through hole 10, and the hoisting shaft is formed in the through hole 10. When it penetrates 3 and is adjacent to the transmission body 7, the engagement portion 7a can be accommodated in the adjustment groove 11 in a state of being in contact with the side surface of the transmission body 7 on which the engagement portion 7a is formed. In addition, the end projections 8b and 8b of the tightening body 8 are accommodated, and the facing wall surfaces of the adjustment groove 11 serve as hoisting pressing surfaces 11a and 11a. The upper pressing surfaces 11a 1 and 11a can contact the tightening body 8.

At the end of the hoisting shaft 3 in the axial longitudinal direction, the hoisting shaft 3 is fixed by penetrating the hoisting shaft 3 into the tightening coil portion 8 a of the tightening body 8. The adjusting tool A ₁ is provided on the hoisting shaft 3 so as to be housed inside, and the transmitting body 7 is hoisted so that the side surface on which the engaging portion 7a is formed abuts the adjusting tool A ₁ . It rotatably penetrates the shaft 3, one end of the balance spring 6 is connected to the fixed portion 7b of the transmission body 7, and the other end side of the balance spring 6 is located at a position different from the hoisting shaft 3 such as a wall or a ceiling. It is fixed to a fixed plate 12 provided in the.

As shown in FIG. 5, the tightening body 8 has the end projections 8b, 8b housed in the adjusting groove 11 inside the through hole 10 of the adjusting tool A ₁ , and the transmitting body 7 The end protruding portion 8b located on the side is configured so as to be located between the locking portion 7a of the transmission body 7 and the hoisting pressing surface 11a of the adjusting groove 11, and is installed in the adjusting tool A ₁ while the other The end projecting portion 8b is configured to be in contact with the unwinding pressing surface 11b of the adjusting groove 11.

[0018]

[Action]

First, in order to apply a twisting force to the elastic force of the balance spring 6, the grip portion 9 of the adjusting tool A ₁ is wound in the winding direction (balance spring 6 It is rotated in the same direction as the winding direction to the left in FIGS. 5 and 6, but at this time, the tightening coil portion 8a of the tightening body 8 installed in the through hole 10 of the adjusting tool A ₁ is shown in FIG. As shown in a), the end projecting portion 8b in the adjusting groove 11 is pressed by the hoisting pressing surface 11a, the tightening force of the tightening coil portion 8a is weakened, and the clearance s 2 is generated, so that the tightening body 8 is tightened. Rotates with respect to the hoisting shaft 3.

Here, the adjusting tool A ₁ is a balance spring with respect to the hoisting shaft 3 in a stopped state of the transmission body 7 via the locking portion 7 a formed on the transmission body 7 at the same time as the rotation of the tightening body 8. 6 Rotate in the winding direction.

When the rotation of the adjusting tool A ₁ is stopped at the next moment, a torque is generated in the transmission body 7 in the direction opposite to the winding direction of the balance spring 6 with respect to the winding shaft 3 in the stopped state. The engaging portion 7a of the transmission body 7 presses the end projection 8b of the tightening body 8 along the winding direction of the tightening coil portion 8a, and as shown in FIG. 6 (b), the tightening coil portion 8a. It acts to reduce the inner diameter of the hoisting shaft 3 and is fixed by tightening the hoisting shaft 3.

Further, when the balance spring 6 is excessively twisted, the adjusting tool A ₁ is rotated in the direction opposite to the winding direction of the balance spring 6, as shown in FIG. At some times, as shown in FIG. 8 (a), the lowering pressing surface 11b of the adjusting tool A ₁ presses the end protrusion 8b, and the tightening coil portion 8a is tightened to the hoisting shaft 3 in the same manner as described above. By reducing the applied force, the balance spring 6 is twisted in the opposite direction to the winding direction.

Further, after stopping the adjusting tool A ₁ , as shown in FIG. 8 (b), the engaging portion 7 a of the transmission body 7 causes the end projection 8 b of the tightening body 8 to engage the tightening coil portion 8 a. Is pressed in the tightening direction, and the transmission body 7 is fixed to the hoisting shaft 3.

[0023]

[Effect of the device]

In the present invention, the hoisting shaft 3, the balance spring 6 having one end fixed, and the end protrusions 8b and 8b are formed with an appropriate angular difference in the circumferential direction from both ends of the tightening coil portion 8a. The tightening body 8 and an adjusting tool A ₁ having a through hole 10 capable of accommodating the tightening body 8 and an adjusting groove 11 are formed. The tightening body 8 and the adjusting tool A are attached to the hoisting shaft 3. _It is possible to expand and contract the tightening body 8 which is locked to the other end of the balance spring 6 by appropriately rotating the adjusting tool A ₁ so that ₁ can be rotated and can be locked to each other. By using the spring hoisting device for the overhead type door, firstly, the twisting force can be applied to the balance spring 6 easily and quickly, and secondly, the number of members constituting the present invention is small and the structure is simple. Can be offered at a low price, etc. Achieve the results.

To explain these effects in detail, in the present invention, the tightening coil portion 8a is loosened with respect to the hoisting shaft 3 in which the adjusting tool A ₁ is stopped (the one side of the adjusting groove 11 inside is tightened). By pressing the end protrusion 8b of the body 8, the tightening body 8 can be rotated with respect to the hoisting shaft 3, and at the same time the end protrusion 8b is stopped together with the other side. By rotating the balance spring 6 in such a manner that the winding of the balance spring 6 becomes dense with respect to the hoisting shaft 3, it is possible to give more torsional force (torque) to the balance spring 6, and this series of operations is This can be performed by an extremely simple operation of simply rotating the adjusting tool A ₁ in a predetermined direction with respect to the hoisting shaft 3 in the stopped state.

Further, when the rotating operation of the adjusting tool A ₁ is stopped, a torque is applied in a direction opposite to the rotating direction by the elastic reaction force of the balance spring 6, but the tightening coil portion 8a is caused by the torque. By pressing in the shrinking tightening direction, the tightening coil portion 8a is tightened extremely firmly to the hoisting shaft 3, and the other end of the balance spring 6 can be fixed to the hoisting shaft 3.

Further, even when the twisting force of the balance spring 6 is loosened (roughening of the winding), the tightening coil portion 8a is expanded and loosened by rotating the adjusting tool A ₁ in the predetermined direction. At the same time as it can rotate with respect to the hoisting shaft 3, after the adjusting tool A ₁ is stopped, the tightening coil portion 8a is contracted by the elastic reaction force of the balance spring 6 in the tightening direction. This allows the other end of the balance spring 6 to be fixed to the hoisting shaft 3.

That is, it is possible to apply an appropriate torsional force to the balance spring 6 only by rotating the adjusting tool A ₁ with respect to the hoisting shaft 3 in a stopped state and releasing it at a predetermined position. Even one person can make sufficient adjustments and secure a safe working condition.

Next, in the present invention, the tightening body 8 is formed in the shape of a coil spring, and the adjusting tool A ₁ is a through hole through which the tightening coil portion 8 a of the tightening body 8 can be loosely inserted. The hole 10 and the end projections 8b, 8b are formed with only the adjusting groove 11 capable of being internally housed, and the shape thereof is extremely simple. Also, it suffices to arrange the adjusting tools A _{1 so} as to be adjacent to each other, and it is possible to assemble them by a simple work, and it is possible to provide them at a low price.

[Brief description of drawings]

FIG. 1 is a perspective view of an overhead door.

FIG. 2 is a schematic front view of an overhead door.

FIG. 3 is a vertical sectional side view of the main part of the present invention.

FIG. 4 is a perspective view of the main part of the present invention.

FIG. 5 is a sectional view of the main part of the present invention.

6 (a) and 6 (b) are enlarged views of a main part showing the action.

FIG. 7 is a sectional view of the main part of the present invention.

8 (a) and 8 (b) are enlarged views of a main part showing the action.

FIG. 9 is a schematic view showing the operation of the present invention.

FIG. 10 is a perspective view of another embodiment of the present invention.

[Explanation of symbols]

3 ... Hoisting shaft A ₁ ... Adjusting tool 6 ... Balance spring 8 ... Tightening body 8a ... Tightening coil part 8b ... End protrusion 10 ... Through hole 11 ... Adjusting groove

Claims (1)

[Scope of utility model registration request] 1. A hoisting shaft, a balance spring having one end fixed, and a tightening body having end projections formed at appropriate angles in the circumferential direction from both ends of the tightening coil portion. An adjusting tool having a through hole capable of accommodating the tightening body and an adjusting groove is formed, and the tightening body and the adjusting tool are provided on the hoisting shaft so that the tightening body and the adjusting tool are rotatable and can be locked to each other. A spring hoisting device for an overhead door, wherein a tightening body locked to the other end of the balance spring can be expanded and contracted by appropriate rotation of a tool.