JPH0224985B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a door opening/closing device, and particularly to a door opening/closing device suitable for use in a garage or the like.

The first state of engagement of the trolley with the conventional rail
This will be explained based on FIG. Figure 1 is a side view;
FIG. 2 is a view taken along arrow A in FIG. The trolley 4 is arranged so as to wrap around the rail 2, which has a cross-sectional shape as shown in FIG. On the other hand, the roller chain 3 is connected to the rail 2
The rail is guided by a groove provided on the lower surface of the rail and moves in the longitudinal direction of the rail. Further, the connecting fitting 4-a is engaged with the tip of the roller chain 3, so that the roller chain 3
The operation is transmitted to the trolley 4. Further, the movement of the trolley 4 is transmitted to the door arm 10 via the connecting pin 50, and further transmitted to the door 6. That is, the door 6 is opened and closed by the trolley 4 moving back and forth in the longitudinal direction along the rail 2. As can be seen from the above explanation, since the trolley 4 slides along the rail 2 when opening and closing the door 6 via the door arm 10, the angle of the door arm 10 approaches the right angle to the rail 2. Accordingly, the frictional resistance on the sliding surfaces of the trolley 4 and the rail 2 increases, and the frictional loss becomes extremely large. In addition, in the conventional examples shown in Figures 1 and 2, the rail 2 and trolley 1 are both made of steel for reasons of economy and strength, which not only increases friction loss but also causes wear and tear when opening and closing the door. The life of the device was not satisfied.

The purpose of the present invention is to reduce the wear and friction loss of the sliding surface between the rail and the trolley in a door opening/closing device that opens and closes the door by means of a trolley sliding on a rail, and to facilitate the recovery process in the event of wear. It's about doing.

And in order to achieve this objective, the present invention
A main body including a drive device, a rail connected to the main body, and a pair of opposing grooves, the rails are disposed within the groove, and the inner walls of the groove are used as a pair of opposing engagement surfaces to connect both sides of the rails. A door opening/closing device comprising a trolley that is provided to engage with the rail so as to wrap around the outside and slide along the rail by being driven by the drive device, and a door arm for connecting the trolley and the door. , a body portion having an outer circumferential surface corresponding to the engagement surface of the trolley and an inner circumferential surface corresponding to the outer surface of the rail, and convex portions provided at both ends of the body portion are made vertically symmetrical by a low-friction material. , a pair of slide guides formed in a left-right symmetrical shape are removably inserted into the pair of engaging surfaces of the trolley, and the trolley is moved with the convex portion positioned outside the end surface of the trolley. The present invention is characterized in that the pair of slide guides are sandwiched and interposed between both outer surfaces of the rail and the pair of engagement surfaces of the trolley by engaging with the outer surfaces of the rail.

A slide guide made of a low-friction material interposed between the rail and the trolley to reduce wear and friction loss is prevented from falling off (falling off) by convex portions at both ends thereof. Further, when the slide guide becomes worn, it can be easily replaced because the slide guide can be attached to and detached from the engagement surface by removing the trolley from the end of the rail. Furthermore, slide guides generally wear unevenly, but a pair of slide guides formed in a symmetrical shape from left to right and top to bottom can be used effectively (wear evenly) by replacing the top and bottom or the left and right. This will extend your lifespan. Furthermore, since each slide guide has the same shape, the number of maintenance parts can be reduced.

Generally, as shown in FIG. 3, a garage door opening/closing device consists of a main body 1 containing a drive device, a rail 2 connected to the main body 1, and guided by the rail 2, and driven by the driving force of the main body 1. A trolley 4 that is fixed to an operating roller chain 3 and moves horizontally.
Consists of the main parts of. The main body 1 is hung from the ceiling of the garage using a hanging fitting, while the end of the rail 2 is fixed to a part of the garage by a header bracket 5. On the other hand, the garage door 6 is generally divided into several parts and connected to each other.
It is opened and closed along door rails 7 provided on both sides. Further, the weight of the garage door 6 is balanced by a door balance spring 8, so that the garage door 6 can be opened and closed manually. A door bracket 9 is fixed to the garage door 6 in the above state, and the door bracket 9 and the trolley 4 are rotatably connected via a door arm 10. As a result, the garage door 6 is moved to the door rail 7 in conjunction with the roller chain 3 that is operated by the driving force of the main body 1 and the trolley 4 that moves horizontally along the rail 2 by the operation of the roller chain. It opens and closes along the line. Power is supplied to the main body 1 via a power cable 11.

Further, the operation command to the main body 1 is to press a push button switch 12 attached to the wall of the garage;
Alternatively, a signal such as a radio wave is received by the receiver 13 and an operation command is issued to the main body 1. In addition, in the event that the garage door opening/closing device becomes inoperable due to a power outage, etc., the roller chain 3 and the trolley 4 are disconnected by the detachment cord 14, and the garage door is opened manually. 6 can be opened and closed independently.

First, the structure of the main body of the garage door opening/closing device will be explained with reference to FIGS. 4 and 5. Figure 4 is a longitudinal side view;
FIG. 5 is a partially cross-sectional top view.

Motor 1 fixed to the lower side of main body frame 15
6 is rotated by the motor pulley 17 fixed to the motor shaft 16-a, the V-belt 18, and the large pulley 1.
9. Furthermore, the rotation of the large pulley 19 is transmitted to the sprocket 21 via the sprocket shaft 20. A roller chain 3 is engaged with the sprocket 21. The roller part of the roller chain 3 is connected to the chain guide (A) 22 and the chain guide (B) 2 from both sides within the main body frame 1.
3. Guided by chain guide (C) 24. The rail 2 is fixed to the frame 15 by a rail fixing fitting 25 without any steps or gaps in the groove formed by the chain guide (A) 22 and the chain guide (C) 24. The roller portion of the roller chain 3 is guided by the rails 2 on both sides.

On the other hand, the roller chain 3, which is also wound by the sprocket 21, is stored in a groove formed by the chain guide (A) 22 and the chain guide (B) 23, and is fixed without any steps or gaps. Chain storage groove 2 of chain storage case 27
7-a.

With the above configuration, the sprocket 21 is rotated by the rotational drive of the motor 16, and the roller chain 3 is reciprocated along the rail 2.

Next, the limit mechanism for limiting the upper and lower limits of the opening/closing operation of the garage door 6, that is, the amount of horizontal movement of the trolley 4 explained with reference to FIG. 3, will be described below. The amount of movement of the roller chain 3 is converted into the amount of movement of a pulley rack 28 provided on the outer periphery of a large pulley 19 that rotates at the same rotation speed as the sprocket 21. The amount of movement of the pulley rack 28 is transmitted to an upper limit switch 30 and a lower limit switch 31 via a pinion 29 that meshes with the pulley rack 28. An upper limit point adjustment knob 32 and a lower limit point adjustment knob 33 are provided on each of the upper limit switch 30 and lower limit switch 31, thereby allowing the upper limit point and the lower limit point to be freely adjusted from outside the main body.

If the garage door hits an obstacle while descending, it must be detected quickly for safety and reverse operation, that is, it must rise; must be detected and stopped. The obstacle detection mechanism described above will be explained below. A part of the chain guide groove formed by the chain guide (A) 22, the chain guide (B) 23, and the chain guide (C) 24 is formed into a curved path to reduce the compressive force applied to the roller chain 3 when the door is lowered. , an obstruction detection fitting 34 is provided which is moved by the force generated by each of the tensile forces applied when the door is raised. The compression force of the obstruction spring 35 that restricts the movement of the obstruction detection fitting 34 can be freely changed by turning the obstruction operating force adjusting screw 36 and moving the spring presser plate 37. Further, when the above-mentioned obstacle is detected by the obstruction detection switch 52, which is turned on and off according to the movement of the obstruction detection metal fitting 34, the door is raised when the door is lowered, and stopped when the door is raised. .

Further, a lamp 38 for illuminating the inside of the garage is provided, and the light is turned on and off in conjunction with the movement of the garage door. Furthermore, a controller 39 for controlling the motor 16 and the lamp is fixed within the frame 15, and the motor 16, large pulley 19, and lamp 38 are further covered by a main body cover 40 and a lamp cover 41. Incidentally, the lamp cover 41 is semi-transparent and allows the light from the lamp 38 to pass therethrough, thereby brightly illuminating the inside of the garage.

FIG. 6 is a circuit diagram in which the motor 16 is used in combination with a capacitor 181, and is controlled by a latching relay 184 via an upper limit switch 30 and an upper limit switch 31.
There are also a push button switch 12 for commanding door opening/closing and an obstacle detection limit switch 190 for operating the latching relay 184, and a transformer 191 generates power for controlling these. Furthermore, the lamp 38
is lit by the thermal relay 182.

Next, these operations will be explained. First, the door opening/closing command push button switch 12 is turned on, and the latching relay 184 is turned on to contacts A and A', and the motor 16 rotates in the direction of raising the door.At the same time, the voltage between the terminals of the motor 16 turns on the heater of the thermal relay 182. When the relay contacts are heated, the bimetallic relay contacts turn on, lighting the lamp. When the door reaches the upper limit, the upper limit switch 30 is turned off and the motor 16 is stopped. Furthermore, when the door open/close command push button switch 12 is turned on again, the latching relay 184 is now reversed to the contact B/B' side, and the motor 16 rotates in the door lowering direction.
At this time as well, the lamp 38 is lit according to the lamp lighting operation described above. The door lowering operation is completed when the lower limit switch 33 is turned off. However, when the obstacle detection switch 190 is turned on during this operation, the relay coil of the latching relay 184 is energized, and the relay contact is reversed to the A/A' side.
The door reverses from a lowering motion to a rising motion. The door reversing operation as described above is performed in the same way even if the door opening/closing command push button switch 12 is turned on during the raising or lowering operation. Further, the obstacle detection operation is disabled during the ascending operation. Note that the above-mentioned lamp 38 is automatically turned off after a certain period of time during which the bimetal contact of the thermal relay 182 is cooled down after the motor 16 has stopped.

An embodiment of the present invention will be described with reference to FIGS. 7, 8, 9, and 9. 7 is a side view, FIG. 8 is a view taken along arrow A in FIG. 7, FIG. 9 is a detailed front view of the slide guide shown in FIGS. 7 and 8, and FIG. 10 is a It is a side sectional view taken along the line X.

The two slide guides 52, which are made of plastic (nylon) as a low-friction member, each have an outer circumferential surface corresponding to the engagement surface, which is a groove of the trolley 4, and an inner circumferential surface corresponding to the outer surface of the rail 2. A body portion 52a having a body portion 52a and convex portions 52b and 52c provided at both ends of the body portion 52a are integrally formed of a low-friction material in a vertically symmetrical and horizontally symmetrical shape. As shown in FIGS. 7 and 8, the trolley 4 is fitted into the groove of the trolley 4, and the trolley 4 is inserted from the end of the rail 2 with the slide guide 52 fitted so as to wrap around both outside sides of the rail 2. Therefore, the slide guide 52 can be easily interposed between the rail 2 and the trolley 4. Therefore, the trolley 4 can slide extremely smoothly in the longitudinal direction of the rail 2. This slide guide 52 has convex portions 5 at both ends.
2b and 52c are locked at the end face of the trolley 4, the slide guide 52 will not fall off due to sliding of the trolley 4.

The above-mentioned trolley 4 has a connecting fitting 4-a engaged with the tip of the roller chain 3, and moves on the rail 2 in response to the movement of the roller chain 3, similar to the conventional device shown in FIGS. 1 and 2. Sliding. Furthermore, the movement of the trolley 4 is controlled by the door arm 10 via the connecting pin 50.
and further transmitted to the door 6. That is, the door 6 is opened and closed by the trolley 4 moving in the longitudinal direction along the rail 2.
In this case, a force is applied to the trolley 4 as a reaction force from the door arm 10 in an upward direction when the door 6 is lowered, and in a downward direction when the door 6 is raised, and as a result, the surface pressure between the slide guide 52 and the rail 2 is increased. The surface pressure increases as the angle of the arm 10 approaches the right angle to the rail 2, but the sliding friction resistance against the trolley movement is greater than that in the case of direct contact between the trolley made of steel and the rail. However, it becomes extremely small.

In addition, extremely good results were obtained in terms of wear compared to the case of steel as a common material.

Furthermore, even if the slide guide 52 becomes worn out, there is no need to replace the entire trolley 4.
Only the worn slide guides need to be replaced.
In addition, slide guides generally wear unevenly, but a pair of slide guides formed in a symmetrical shape (left and right, top and bottom) can be used effectively (wear evenly) by replacing the top and bottom or the left and right. Extends lifespan. Furthermore, since each slide guide has the same shape, the number of maintenance parts can be reduced.

As described above, according to the present invention, it is possible to reduce the friction loss and wear between the rail and the trolley, and also to reduce the friction loss and wear between the rail and the trolley. The slide guide can be prevented from falling off (falling off) by the convex portions at both ends thereof. Further, when the slide guide becomes worn, it can be easily replaced because the slide guide can be attached to and detached from the engagement surface by removing the trolley from the end of the rail. Furthermore, slide guides generally wear unevenly, but a pair of slide guides formed in a symmetrical shape from left to right and top to bottom can be used effectively by swapping the top and bottom or left and right (to wear them evenly).
This will extend your lifespan. Furthermore, since each slide guide has the same shape, the number of types of maintenance parts can be reduced.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams explaining the prior art, Figure 3
4 and 5 are diagrams explaining the main body structure of the door opening/closing device. FIG. 6 is a diagram showing a control circuit. FIG. 7 is an embodiment of the present invention. Figure 8 is a view from arrow A in Figure 7, Figure 9 is a diagram showing
The figure is a detailed view of the slide guide, and FIG. 10 is a cross-sectional side view of FIG. 9. 1...Body, 2...Rail, 4...Trolley, 1
0...Door arm, 6...Door, 52...Slide guide.

Claims (1)

[Scope of Claims] 1. A main body provided with a drive device, a rail connected to the main body, and a pair of opposing grooves, the rails being disposed within the groove, and a pair of opposing engagements arranged between the inner walls of the groove. a trolley that is provided to engage with the rail so as to wrap around both outside sides of the rail as a mating surface, and that is driven by the drive device and slides along the rail; and a door arm that connects the trolley and the door. A door opening/closing device comprising: a body portion having an outer circumferential surface corresponding to the engaging surface of the trolley and an inner circumferential surface corresponding to the outer surface of the rail; and convex portions provided at both ends of the body portion. A pair of slide guides formed of a friction material in a vertically symmetrical and horizontally symmetrical shape are removably fitted into the pair of engaging surfaces of the trolley, respectively, and the convex portion is positioned outside the end surface of the trolley. The door is characterized in that the pair of slide guides are interposed between both outer surfaces of the rail and the pair of engagement surfaces of the trolley by engaging the trolley with the outer surface of the rail in a state where the trolley is Switchgear.