JP2017128918A - Lifting/lowering door structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lifting/lowering door structure that can prevent a lifting/lowering door and a balance weight from falling suddenly.SOLUTION: A lifting/lowering door structure is characterized as follows: a weight of a lifting/lowering door 3 is set substantially the same as a total weight of all balance weights 4; also, the lifting/lowering door 3 and the balance weight 4 are hung so as to be lifted and lowered while matching in the upper and lower backward direction mutually through a fixed pulley 5 and a flexible suspension member 6; further, a first screw shaft 1 and a second screw shaft 2 are provided vertically and in parallel; a first nut member 11 is mounted to the lifting/lowering door 3 and the first nut member 11 is screwed to the screw shaft 1; a second nut member 12 responding from a lower position is screwed to the second screw shaft 2 to the balance weight 4 through a margin g in the up-and-down direction; and drive means 10 for rotating the first screw shaft 1 and the second screw shaft 2 is provided so that the first nut member 11 and the second nut member 12 may move in the upper and lower backward direction at the same speed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lifting door structure.

  Conventionally, a lift door structure for a garage in which a lift door for opening and closing a garage door and a balance weight are suspended so as to balance each other is known (see Patent Document 1).

JP 07-293140 A

  However, in the elevator door structure described in Patent Document 1, if the wire that suspends the elevator door and the balance weight is cut, the elevator door and the balance weight may be unexpectedly dropped. The elevator doors and balance weights provided in the garage are heavy and there is a risk that a serious accident may occur due to a rapid drop.

  Then, an object of this invention is to provide the raising / lowering door structure which can prevent the fall of a raising / lowering door and a balance weight unexpectedly.

In the lifting door structure according to the present invention, the weight of the lifting door and the total weight of all balance weights are set to be substantially the same, and the lifting door and the balance weight are fixed to the fixed pulley and the flexible suspension. The first screw shaft and the second screw shaft are provided vertically and in parallel so as to be lifted and lowered while being balanced in opposite directions up and down via the members, The first nut member is attached and the first nut member is screwed onto the screw shaft, and the second nut member corresponding to the balance weight from the lower position through a margin in the vertical direction is attached to the first weight member. 2 screw shafts, and the first screw shaft and the second screw shaft are moved so that the first nut member and the second nut member move at the same speed in the reverse direction. Those having a driving means for rotating.
The driving means includes an interlocking mechanism that interlocks and connects the first screw shaft and the second screw shaft, and an electric motor.

  According to the lifting / lowering door structure of the present invention, when the flexible suspension member that holds the lifting / lowering door and the balance weight is cut, the balance weight is slightly lowered by the margin, but immediately becomes the second nut member. Since it is held in contact, it is prevented from falling and safety is high. The elevating door does not fall because the first nut member attached thereto is always screwed to the first screw shaft. Since the elevator door and the balance weight are balanced with substantially the same weight, it is sufficient that the required power of the drive means is approximately equal to the weight difference, and the drive means can be reduced in size and weight, and is light. The elevator door can be raised and lowered (opened and closed). Also, the force required for manual operation in the event of a power failure is small.

It is the cross-sectional side view which showed the closed state of one Embodiment of this invention. It is the cross-sectional side view which showed the open state of one Embodiment of this invention. It is the partial cross section top view which showed one Embodiment of this invention. It is a top view which shows a drive means. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic for demonstrating the action | operation principle of the raising / lowering door structure based on this invention, (A) is a schematic diagram which shows operation | movement of a raising / lowering door and a balance weight, (B) is a 1st screw shaft and a 2nd screw. It is a simplified diagram showing the operation of the shaft. It is a perspective view which shows a screw gear. It is a perspective view which shows the usage example of the raising / lowering door structure which concerns on this invention. It is a principal part expansion explanatory drawing. It is a principal part expansion explanatory drawing.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
As shown in FIG. 7, the elevator door structure of the present invention is installed on the first floor (ground floor) of a building such as a house, and for example, the elevator door 3 for opening and closing the doorway 16 of the garage is lifted up and down freely. The elevator door 3 is held and held at a desired position.
The elevating door 3 is formed in a rectangular shape in front view with a height dimension set to 2500 mm to 3500 mm and a constant width dimension.
In addition, the raising / lowering door structure of this invention may be installed in carry-in entrances, such as a warehouse and a large commercial facility.

As shown in FIGS. 1 and 2, on the indoor side of the entrance / exit 16, the elevating door 3 and the balance weight 4 are balanced in the upside down direction via the fixed pulley 5 and the flexible suspension member 6. It is suspended so as to move up and down.
As shown in FIG. 3, a pair of left and right columns 9, 9 are erected with a distance slightly in the left-right direction slightly wider than the width dimension W of the doorway 16. It is pivotally attached. A flexible suspension member 6 is hung on each fixed pulley 5 to support the loads of the elevating door 3 and the balance weight 4. As shown in FIGS. 1 and 2, auxiliary struts 15 and 15 having small diameters may be provided on the column 9.
The suspension member 6 is preferably made of a wire and has a tensile strength capable of withstanding the load of the lifting door 3 (balance weight 4). Each of the suspension members 6 has one end connected to the upper end of the balance weight 4 and the other end connected to the vicinity of either the left or right side end of the upper end of the lifting door 3. The weight of the lifting / lowering door 3 is about 300 kg, and the total weight of the two balance weights 4 and 4 is set to be substantially the same as the weight of the lifting / lowering door 3.

As shown in FIGS. 1 to 3, two first screw shafts 1 and two second screw shafts 2 are arranged vertically and in parallel on the left and right sides of the doorway 16.
As illustrated in FIGS. 5, 1, and 2, each screw shaft 1, 2 is configured to receive a load in the vertical direction by a thrust bearing 28 or the like and rotate smoothly.
The pair of left and right first screw shafts 1, 1 are inserted into the left and right ends of the lift door 3. First nut members 11 and 11 are attached (fixed) to the elevating door 3, and the first nut member 11 is screwed to each screw shaft 1. In FIG. 1, the first nut member 11 is embedded and fixed to the lower end portion of the elevator door 3, and in FIG. 8, the first nut member 11 is welded to the lower end portion of the elevator door 3 with a weld 26 and an attachment piece 27. It is fixed with etc. In addition, you may attach the 1st nut members 11 and 11 so that the side of the raising / lowering door 3 may protrude outside. In this case, the pair of left and right first screw shafts 1, 1 are disposed on the outer side of the lift door 3.

As shown in FIG. 9, the balance weight 4 is formed with a through hole 14 having an inner diameter larger than the diameter of the second screw shaft 2 in the vertical direction, and the second screw shaft 2 is free to play in the through hole 14 of the balance weight 4. It is inserted in a fitting shape.
A corresponding second nut member 12 is screwed to each of the second screw shafts 2 from the lower position with respect to the balance weight 4 through a margin g in the vertical direction.
The rotation of the second nut member 12 is restricted by a pin P provided in a suspended manner from the lower end of the balance weight 4, and is configured to move up and down without rotating together when the second screw shaft 2 rotates. ing. The rotation restricting means for the second nut member 12 may be other than the pin P.

Further, as shown in FIGS. 1 and 2, the first screw shaft 1 and the second screw shaft 2 are rotated so that the first nut member 11 and the second nut member 12 move in the reverse direction at the same speed. Drive means 10 is provided.
As shown in FIG. 4, the driving means 10 includes an interlocking mechanism 7 that interlocks and connects the first screw shaft 1 and the second screw shaft 2, and an electric motor 8.
The interlocking mechanism 7 is disposed orthogonally to the output shaft 18 of the electric motor 8, has a first rotating shaft 21 that is rotationally driven (by the electric motor 8) via a gear box 20, and The second rotary shaft 22 and the third rotary shaft 23 are disposed orthogonally to the first rotary shaft 21 and are driven to rotate synchronously (by the first rotary shaft 21) via the gearboxes 20 and 20. doing. The 2nd rotating shaft 22 and the 3rd rotating shaft 23 are comprised so that a rotational force may be transmitted via the bevel gears 24 and 24 to the 1st screw shaft 1 and the 2nd screw shaft 2 from the longitudinal direction both ends. Yes. The driving means 10 includes a chainwheel and a chain for manually rotating the output shaft 18 or the first rotating shaft 21 of the electric motor 8 or a manual rotating means such as a manual handle (not shown).
As shown in FIG. 6, the gear box 20 has screw gears 25 and 25 that mesh with each other inside the housing, and is configured to transmit a rotational force to mutually orthogonal axes.

The use method (action | operation) of the raising / lowering door structure of this invention mentioned above is demonstrated.
As shown in FIG. 5A, the weight of the lifting door 3 and the total weight of the two balance weights 4 and 4 are set to be substantially the same, and the left and right ends of the lifting door 3 are respectively fixed pulleys 5. And the lifting / lowering door 3 and the balance weights 4 and 4 are lifted and lowered while being balanced in the opposite directions. On the other hand, as shown in FIG. 5 (B), the first screw shaft 1 and the second screw shaft 2 are rotationally driven by the driving means 10 and have the same rotational speed in the opposite rotational directions R ₁ and R _2. Rotate synchronously at (rotational speed).
As the first screw shaft 1 rotates, the elevator door 3 to which the first nut member 11 is attached rises (or descends), and at the same time, the balance weights 4 and 4 that balance with the elevator door 3 are turned upside down. Descent (or rise). At this time, a lifting speed V ₄ of the lifting velocity V ₃ and the balance weight 4 of the lifting door 3 are the same. Moreover, the 1st screw shaft 1 and the 2nd screw shaft 2 rotate synchronously, and the 2nd nut member 12 raises / lowers with the same speed to the 1st nut member 11 in the up-down reverse direction. That is, the balance weight 4 and the second nut member 12 up and down in the same direction at the same speed, this time, the lift speed V ₄ of the balance weight 4 and the lift speed V ₁₂ of the second nut member 12 are the same. Accordingly, the second nut member 12 is upside down with respect to the lifting / lowering door 3 (first nut member 11) while maintaining the corresponding positional relationship from the lower position with respect to the balance weight 4 through the allowance g in the vertical direction. Move in the direction.

Since the elevating door 3 and the balance weights 4 and 4 are suspended so as to balance each other, the first screw shaft 1 can be rotated with a small torque, and the drive means 10 for elevating the elevating door 3 is provided. The work of the electric motor 8 can be kept low. That is, the electric motor 8 may be a small one with a small horsepower, and there is an advantage that the structure of the driving means 10 can be simplified.
The second nut member 12 is screwed into the second screw shaft 2 at a position below the balance weight 4 and moves up and down at the same speed in the same direction as the balance weight 4. Is maintained. In an emergency when the suspension member (wire) 6 is cut, the balance weight 4 is lowered by the margin g, which is a small dimension, abuts against the second nut member 12, and supports the balance weight 4 from below. Prevent falling. Since the first nut member 11 is screwed to the first screw shaft 1, the elevator door 3 is supported without falling even if the suspension member (wire) 6 is cut.
Further, the second nut member 12 corresponds to the balance weight 4 from a lower position through a margin g in the vertical direction. Even if the suspension member (wire) 6 extends, the second nut member 12 extends from the balance weight 4. No load is applied to 12. That is, the second screw shaft 2 can be rotated with a small torque, and an excessive load is prevented from being applied to the driving means 10 (electric motor 8). When the suspension member 6 is cut off, an excessive load is applied to the driving means 10 (electric motor 8). This is detected electrically or mechanically and the driving means 10 (electric motor 8) is urgently stopped. It is desirable to let them.

  Although the present invention can be modified in design and is not shown in the drawings, for example, the first screw shaft 1 and the second screw shaft 2 are formed by using the first nut member 11 and the second nut member 12 as opposite left and right screws. The rotation direction may be the same.

As described above, the elevator door structure according to the present invention sets the weight of the elevator door 3 and the total weight of all the balance weights 4 and 4 to be substantially the same, and the elevator door 3 and the balance weight. 4 and 4 are suspended through the fixed pulley 5 and the flexible suspension member 6 so as to be lifted and lowered while being balanced in the opposite directions, and further, the first screw shaft 1 and the second screw shaft. 2 is provided in a vertical and parallel manner, and the first nut member 11 is attached to the lift door 3 and the first nut member 11 is screwed to the screw shaft 1 to the balance weight 4. Then, the corresponding second nut member 12 is screwed onto the second screw shaft 2 from below through the vertical allowance g, and the first nut member 11 and the second nut member 12 are reversed in the vertical direction. Move at the same speed As described above, since the driving means 10 for rotating the first screw shaft 1 and the second screw shaft 2 is provided, the flexible suspension member 6 that holds the lifting door 3 and the balance weight 4 is cut. The balance weight 4 is slightly lowered by the allowance g, but is immediately held in contact with the second nut member 12, so that it is prevented from falling and the safety is high. The elevating door 3 does not fall because the first nut member 11 attached thereto is always screwed to the first screw shaft 1. Since the elevating door 3 and the balance weights 4 and 4 are balanced with substantially the same weight, it is sufficient that the necessary power of the driving means 10 is substantially equal to the weight difference, and the driving means 10 should be reduced in size and weight. In addition, the elevating door 3 can be lifted (opened / closed) easily. Moreover, the force required for manual operation at the time of a power failure is small, and the lifting door 3 can be opened and closed lightly by manual operation.
.

  Moreover, since the drive means 10 includes the interlocking mechanism 7 that interlocks and connects the first screw shaft 1 and the second screw shaft 2 and the electric motor 8, the load applied to the electric motor 8 is reduced. The first nut member 11 and the second nut member 12 can be reliably moved in the up and down direction at the same speed with a simple structure and a reduced structure.

DESCRIPTION OF SYMBOLS 1 1st screw shaft 2 2nd screw shaft 3 Lift door 4 Balance weight 5 Fixed pulley 6 Flexible suspension member 7 Interlocking mechanism 8 Electric motor 10 Driving means 11 1st nut member 12 2nd nut member g Margin

Claims (2)

The weight of the elevating door (3) and the total weight of all the balance weights (4) (4) are set substantially the same, and the elevating door (3) and the balance weights (4) (4) Is suspended through the fixed pulley (5) and the flexible suspension member (6) so as to move up and down while balancing each other in the opposite direction.
Furthermore, the first screw shaft (1) and the second screw shaft (2) are provided vertically and in parallel,
The first nut member (11) is attached to the elevating door (3), and the first nut member (11) is screwed to the screw shaft (1). The corresponding second nut member (12) is screwed onto the second screw shaft (2) from a lower position via a margin of direction (g),
The first screw shaft (1) and the second screw shaft (2) are rotated so that the first nut member (11) and the second nut member (12) move in the reverse direction at the same speed. A lifting door structure characterized by comprising driving means (10).   The drive means (10) comprises an interlocking mechanism (7) for interlockingly connecting the first screw shaft (1) and the second screw shaft (2), and an electric motor (8). The lifting door structure according to 1.

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