JPH07217346A - Opening-closing drive mechanism of door of gate - Google Patents

Abstract

PURPOSE:To prevent the falling of the lifted door of a gate even when a chain is cut, and to open and close the door of the gate manually at the time of service interruption. CONSTITUTION:A driving gear 5 is journalled to a driving shaft 4, and a first belt wheel 6 is penetrated rotatably. A chain 7 is stretched around the driving gear 5, and the door of a gate 1 is hung at one end of the chain and a weight 8 at the other end. A belt 9 is stretched around the first belt wheel 6, and the door of the gate 1 is hung at one end of the belt and the weight 8 at the other end. A first sensor S1 stopping a driving motor M when the first sensor S1 is brought into contact with a pushing body 71 installed to the chain 7 is mounted near the chain 7. A second sensor S2 stopping the driving motor M when the second sensor S2 is brought into contact with the belt 9 and moved with the looseness of the belt 9 is set up near the belt 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate opening / closing drive mechanism for a house or a garage.

[0002]

2. Description of the Related Art Conventionally, as a gate opening / closing drive mechanism, a gate is suspended at one end of a chain and a weight having the same weight as this gate is suspended at the other end, and a drive gear is driven by a drive motor to be applied to the drive gear. There is one that moves the gate up and down by driving the turned chain.

[0003]

However, in the conventional example, since the gate and the weight are suspended only by the chain, in the unlikely event that the chain is broken, the lifted gate suddenly drops, which is very dangerous. . Further, if the drive motor stops during a power failure, the transmission between the drive motor and the motor shaft cannot be canceled, and there is a problem that the gate cannot be moved up and down.

Therefore, an object of the present invention is to provide a gate opening / closing drive mechanism in which the lifted gate does not drop even when the chain is broken, and the gate can be manually moved up and down in the event of a power failure. It is in.

[0005]

The feature of the present invention is that the drive gear is rotatably driven by the drive motor, the drive gear is rotatably mounted on the drive shaft, and the first belt wheel is rotatably free. A chain is hung around the gears, a gate is hung at one end of the chain, and a weight is hung at the other end. A belt is hung around the first belt wheel. There is a gate on the other side, and a weight is hung on the other end.The gate is movable up and down. The weight is the same as that of the gate. A first sensor that stops the drive motor when it comes into contact with the pressing body is provided, and the first sensor that is in contact with the belt near the belt and stops the drive motor when the belt moves as the belt loosens. There are two sensors.

A second feature of the present invention is that the drive motor is mounted on a movable support plate, and a second belt wheel is pivotally attached to the tip of the motor shaft of the drive motor. A third belt wheel is attached to the rotating drive shaft, a belt is wound around the second belt wheel and the third belt wheel, and a cam hole is provided in the support plate. The cam is fitted, and the support plate can be moved in a predetermined direction by the rotation operation to relieve the tension of the belt.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a gate 1 has frames 21 and 21 of two columns 2 and 2 which are oppositely provided at both ends thereof.
The first guide rail 22 formed on the facing surface (FIG. 3)
It is fitted with the guide rail and is moved up and down by being guided by the guide rails to open and close. A storage portion 3 is installed between the upper portions of the two columns. An opening / closing drive mechanism for the gate 1 driven by a drive motor M, which will be described later with reference to FIG. 7, is installed in the storage section 3.

In FIG. 2, the motor shaft M of the drive motor M
The drive shaft 4 that is rotationally driven by a (FIG. 7) is axially supported along the longitudinal direction inside the storage unit 3. At both ends of the drive shaft 4, a drive gear 5 located at the upper part of the pillars 2 and 2 is rotatably mounted, and a first belt wheel 6 is coaxially rotatably passed through. A chain 7 is wound around the drive gear 5, and a belt 9 is wound around the first belt wheel 6. The gate 1 is suspended from one end of the chain 7, and the weight 8 having the same weight as the gate is suspended from the other end. The gate 1 is suspended from one end of the belt 9 and the weight 6 is suspended from the other end thereof. This suspension structure will be described later. Although FIG. 2 shows only the structure of one end of the drive shaft 4, the structure of the other end is substantially the same.

A structure for suspending the gate 1 and the weight 8 by the chain 5 and the belt 9 will be described. As shown in FIG. 2, a connecting shaft 11 is provided below both end surfaces of the gate 1, and a first guide roller 12 is rotatably supported by the tip of this connecting shaft. A connecting ring 13 is engaged with an intermediate portion of the connecting shaft 11, and a connecting piece 14 is attached to a tip end portion of the connecting shaft. As shown in FIGS. 2 and 3, brackets 15 are provided so as to project rearward above the inner sides of both ends of the gate 1. The bracket 15 is provided with a support shaft 16 along the surface direction of the gate 1, and a second guide roller 17 is rotatably supported at the tip of the support shaft. The weight 8 stores a plurality of weight plates 81 ...
It is stored inside and the weight plate is integrated with bolts and nuts. Guide rollers 8 are provided on both side surfaces of the case 82.
3, 83 are rotatably provided, and a connecting projection 84 is projected on the upper surface of the uppermost weight plate 81. A connecting ring 8 is provided on the upper rear surface of the case 82 via a support shaft 85.
6 is provided. One end of the chain 7 is connected to the connecting ring 13 attached to the connecting shaft 11 of the gate 1, and the other end is connected to the connecting ring 86 of the weight 8. Further, one end of the belt 9 is connected to the connecting piece 14 of the connecting shaft 11 of the gate 1, and the other end is connected to the connecting protrusion 84 of the weight 8.

Next, the structure of the guide means for guiding the gate 1 in the vertical direction by the first and second guide rollers 12 and 17 will be described. As shown in FIGS. 3 and 4, the frame 21 in the column 2 includes a first guide rail 22 for guiding the first guide roller 12 and a second guide rail 23 for guiding the second guide roller 17. And are formed. As shown in FIG. 4, the first guide rail 22 is connected to the frame 2
It is formed in the vertical direction from the lower end portion to the top portion in the insides 1, 21. The second guide rail 23 that guides the second guide roller 17 extends vertically from the middle to the upper portion of the frames 21 and 21, and is bent at a right angle from the frame into the storage portion 3 and extends in an inverted L shape extending horizontally. I am in a shape.

When the gate 1 is opened, this gate is the frame 2
Although it is guided by the guide rails 22 of 1, 21 and rises,
A configuration for stopping the rising of the gate when the gate reaches the upper end will be described with reference to FIG. Storage 3
The inside of is the outer frame 31 and the inner frame 3 fitted in this outer frame.
2 is installed, and a pressing body 71 is projectingly provided at a predetermined one position on the outer periphery of the chain 7 around which the drive gear 5 located in the frame is wound. On the right side of the gear 5, the first sensor S1 is provided on the holding plate 33 at a predetermined interval. The first sensor S1 is provided with an expanding and contracting operating shaft 72, which constantly projects in the chain direction by a spring force, and a roller 73 is rotatably attached to the tip of this operating shaft.
The position of the tip of the roller 73 is located within the movement trajectory of the pressing body 71 of the chain 7. Therefore, the first sensor S1
When the pressing body 71 of the chain 7 comes into contact with the roller 73 of
The operating shaft 72 retracts, and the first sensor operates to stop the drive motor M, so that the upward movement of the gate 1 stops.

Next, with reference to FIG. 6, for a structure for automatically stopping the downward movement of the gate 1 if an obstacle or the like is located on the descending line while the gate 1 is descending. And explain. A second sensor S2 is provided near the right side of the belt 9, and an operating shaft 202 projects from the cylindrical case 201 of the second sensor toward the belt. The base end portion of the actuating shaft 202 is formed in a hollow shape, and the coil spring 203 is inserted in the hollow portion between the bottom and the bottom of the case 201.
An operating pin 204 is planted on the upper surface of the base end portion of the operating shaft 202, and this pin projects upward through a slit 201a formed on the upper surface of the case. Working shaft 202
A roller 205 is rotatably supported at the tip of the
This roller elastically contacts the belt 9 on the side where the weight 8 is suspended by the spring force of the spring 203. The operation pin 204 can be engaged with the operation contact piece 206 of the limit switch Sw during its movement. Therefore,
If the lower end of the gate 1 comes into contact with an obstacle while descending,
Since the belt 9 loosens and bends as shown by the chain line, the operating shaft 2
02 is extended by the spring force, so that the actuating pin 204 abuts the contact piece 206 of the limit switch Sw, and the drive motor M stops operating.

Next, the structure of the drive mechanism for opening and closing the gate will be described.

In FIG. 7, a fixing plate 300 is U-shaped with its front and rear surfaces and upper surface opened, and the locking plate 301 is fixed to the inner surface of one wall surface of this fixing plate with screws. There is a small-diameter through hole 302 in the bottom plate. A holding plate 400 is fixed in the fixed plate 300, a horizontally long hole 401 is opened at a central portion of the holding plate, and horizontally long holes 402 are opened at respective corners. On the plate
A groove portion 403 having an upper end opening is bored. In the fixed plate 300, an L-shaped support plate 500 is installed in a state of being joined to the holding plate 400, and at the center of the rising portion of this support plate, at a position facing the long hole 401 of the holding plate 400. Circular through-holes 501 are opened, and through-holes 502 ... Are also opened at positions facing the long holes 402 ... At each corner. Further, a large-diameter cam hole 503 and a long hole 504 are formed on the bottom surface of the support plate 500, and a locking plate 505 is bent on the bottom plate.
A locking hole 505a is opened in this locking plate. A casing 60 in which the drive motor M and its reduction mechanism are inserted.
The motor shaft Ma protruding from the central portion of the bottom surface of 0 penetrates the long hole 401 of the holding plate 400 and the long hole 501 of the support plate 500, and the second belt wheel 700 is pivotally attached to the tip thereof. The four fixing bolts 601 protruding from the side surface of the casing 600 penetrate the long holes 402 of the holding plate 400 and the through holes 502 of the support plate 500.
It is screwed and fixed to the nut 602. Second belt wheel 7
00 and a third belt wheel 800 are wound around a belt 900, and the tip end of a drive shaft 4 installed parallel to the motor shaft Ma is rotatably attached to the third belt wheel. The shaft is pivotally supported by the groove portion 403 of the holding plate 400.

As described above, two compression springs 303, 303 are stretched between the locking plate 505 of the support plate 500 installed in the fixed plate 300 and the locking plate 301 of this fixed plate. A spring force is applied to this support plate in an obliquely upper right direction in FIG.

As shown in FIGS. 7 and 10, a support plate 500 is provided.
The compression spring 3 inside the fixed plate 300 and the surface of the holding plate 400.
It is slidable against the spring force of 03 and 303.
The structure is such that a large-diameter cam hole 503 on the bottom surface of the support plate 500 is used.
The small diameter through hole 302 on the bottom surface of the fixing plate 300 and the cam 1
00 is rotatably fitted. The shape of the cam 100 is
The cam portion 101 is on the top, and the cylindrical portion 1 is on the lower portion of this cam portion.
02, a prismatic operating portion 103 is integrally formed on the lower part thereof, and the operating portion and the cylindrical portion are formed concentrically, but the cam portion 101 is eccentric to the cylindrical portion. It is formed at the position. The cam portion 101 is fitted into the large-diameter cam hole 503, the column portion 102 is rotatably fitted into the small-diameter through hole 302 of the fixed plate 300, and the operation portion 103 hangs downward from the lower end. . Therefore, when the cam 100 is rotated via the operation portion 103, the cam portion 101 resists the support plate 500 against the spring force of the compression springs 303, 303 to move the inside of the fixed plate 300 to the lower right and the lower right in FIG. It can reciprocate upward, and at this time, the casing 600 of the drive motor M moves together with the support plate. of course,
At this time, the motor shaft Ma moves in the elongated hole 401, and the bolts 601 move in the penetrating elongated holes 402 ... As a result, a state as shown in FIG. The belt 900 wound around the wheel 700 and the third belt wheel 800 is loosened, and the third belt wheel 800 is released from the fastening force of this belt so that the drive shaft 4 can be rotated by a human force. become.

Next, the operation of the present invention will be described.

When the gate of the gate 1 is opened, the switch of the drive motor M is turned on, and when the gate is lifted by the chain 7 due to the rotation of the drive motor, as shown in FIG. The rollers 12 and 17 are guided vertically by the respective guide rails 22 and 23 and vertically rise to the upper side, and the gate 1 is gradually lifted upward while facing the horizontal direction, and finally stored in the storage unit 3 in a horizontal state. To be done. When the pressing body 71 of the chain 7 presses the roller 73 of the sensor S1, the drive motor M stops operating. When the gate 2 descends, follow the reverse process.

If there is an obstacle under the gate in the middle of closing the gate 1, the drive gear 4 continues to rotate unless the drive motor M stops, so that the descent of the gate stops but the weight 8 Chain 7 will continue to rise. However, the chain 7 on the side where the gate 1 is suspended is loosened because the obstacle is prevented from descending. At this time, since the first belt pulley 6 freely penetrates the drive shaft 4, the drive shaft 4 rotates when the belt 9 on the side that suspends the gate 1 is prevented from descending due to an obstacle. The rotation of this belt car stops even if it continues. However, since the weight 8 is lifted by the chain 7, the belt 9 on which the weight is suspended is loosened as shown by the chain line in FIG. In this way, when the belt 9 on the side that suspends the weight 8 loosens inward, the roller 205 advances by the force of the spring of the spring 203, and the operating pin 204 causes the contact piece 206 of the switch Sw1 to move. To stop the drive motor M.

Next, a description will be given of measures to be taken when the drive motor M is stopped due to a power failure while the gate 1 is being opened or closed. As shown in FIG. 8, the support plate 500 is usually located closer to the right side surface of the fixed plate 300. By the way, at the time of a power failure, the gate is manually moved up and down. For that purpose, first, the second belt wheel 700 and the third belt wheel 80
It is necessary to relieve the tension state of the belt 900 wound around 0. Therefore, when a handle is attached to the operation unit 103 and the cam 100 is rotated 180 degrees, the operation shown in FIG.
As shown in FIG.
Moves to the left with the drive motor M. Along with this movement, the second belt wheel 7 axially attached to the tip of the motor shaft Ma
00 also moves to the left, so the second belt wheel 700 and the third belt wheel 700
The tension state of the belt 900 wound around the belt wheel 800 is relieved and the transmission between the drive motor M and the drive shaft 4 is released, so that the drive shaft can be manually rotated and the gate 4 is moved up and down. It will be possible. In order to recover the power transmission between the drive motor M and the drive shaft 4 after the power failure is corrected, the cam shaft is rotated again by 180 degrees by the handle.
At this time, the support plate 500 returns to its original position by the restoring force of the pulled springs 303, 303, the gap between the second and third belt pulleys 700, 800 is opened, and the belt 900 becomes in a tension state again.

[0022]

According to the present invention, since the weight and the gate are suspended by the chain and the belt, even if the chain is broken, the weight and the gate are suspended by the belt, so that the lifted gate suddenly drops. There is no such thing. Further, at the time of power failure, the transmission of the drive motor and the drive shaft can be released by rotating the cam, so that the gate can be opened and closed manually.

[Brief description of drawings]

FIG. 1 is an overall view.

FIG. 2 is a diagram showing a state in which a weight and a gate are suspended and supported.

FIG. 3 is a partially cutaway transverse sectional view.

FIG. 4 is a vertical sectional view showing a moving state of a gate.

FIG. 5 is a diagram showing a state in which a chain is wound around a drive gear.

FIG. 6 is a diagram showing a state in which a belt is wound around a first belt pulley.

FIG. 7 is an exploded view showing a drive mechanism for opening and closing a gate.

FIG. 8 is a side view showing a connected state of a second belt pulley and a third belt pulley.

FIG. 9 is a side view showing a state in which the connection between the second belt wheel and the third belt wheel is released.

FIG. 10 is a top view of a drive mechanism that opens and closes a gate.

[Explanation of symbols]

 1 gate 100 cam 4 drive shaft 5 drive gear 500 support plate 503 cam hole 6 first belt wheel 7 chain 71 pressing body 700 second belt wheel 8 weight 800 third belt wheel 9 belt 900 belt M drive motor Ma motor shaft S1 first 1 sensor S2 2nd sensor

Claims (2)

[Claims] 1. A drive gear 4 is rotatably driven by a drive motor M, a drive gear 5 is attached to the drive shaft 4, and a first belt wheel 6 is provided.
Is rotatably loosely engaged, a chain 7 is wound around the drive gear 5, a gate 1 is suspended at one end of the chain 7, and a weight 8 is suspended at the other end thereof. A belt 9 is wound around the first belt wheel 6,
A gate 1 is suspended from one end of the belt 9 and a weight 8 is suspended from the other end thereof. The gate 1 is movable up and down. The weight 8 has the same weight as the gate 1. In the vicinity of the chain 7, there is provided a first sensor S1 that stops the drive motor M when it comes into contact with the pressing body 71 provided in the chain 7, and in the vicinity of the belt 9. Is provided with a second sensor S2 that is in contact with the belt 9 and that stops the drive motor M when the belt 9 moves as the belt 9 loosens. 2. The drive motor M according to claim 1.
Is attached to a movable support plate 500, and the second belt wheel 7 is attached to the tip of the motor shaft Ma of the drive motor M.
00 is pivotally mounted, and a third belt wheel 800 is pivotally mounted on the drive shaft 4 that is rotated by the motor shaft Ma. The second belt wheel 700 and the third belt wheel 800 are A belt 900 is wound around, a cam hole 503 is provided in the support plate 500, a cam 100 is fitted in the cam hole 503, and the support plate 500 is rotated in a predetermined direction by a rotating operation. To
A gate opening / closing drive mechanism capable of relieving the tension of the belt 900.