JPS6320989B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a door opening/closing device, and particularly to a door opening/closing device equipped with a shock absorbing mechanism suitable for use in garages and the like.

[Conventional technology]

The 10th impact absorption mechanism of the conventional door opening/closing device
This will be explained based on FIG.

FIG. 10 shows a structure in which a shock absorbing mechanism is provided at the connecting portion between the drive means and the trolley. Driving means 55-a, 5 such as a wire or chain connected to a driving source
5-b are connected to both ends of the slide connector 56. The slide connector 56 is slidably attached to the trolley 4 and drives the trolley 4 via springs 52-a, 52-b between the collars 57-a, 57-b and the trolley 4. Trolley 4 is door arm 1
0-a, 10-b and the door 6 via the door bracket 9. Shocks generated by the door 6 or the drive source are absorbed by the springs 52-a and 52-b.

The one shown in FIG. 11 is used when the method shown in FIG. 10 cannot be used. For example, if the drive system is a screw shaft system or an end roller chain system as disclosed in the specification and drawings of Japanese Patent Application No. 53-72507 (see Japanese Patent Application Laid-open No. 54-163271), If the door is inside the rail and there is only one drive part, a shock absorption mechanism is provided in the door arm part. A slide arm 59 is provided between the L-shaped door arm 10-a and the straight door arm 10-b, and the slide arm 59 and the straight door arm 10-b are slidably connected by a pin 58 and the spring force of the spring 52 is used. It absorbs shock.

[Problem that the invention seeks to solve]

In all of the shock absorbing mechanisms in the conventional door opening/closing devices described above, the shock absorbing springs are exposed to the outside of the trolley, making them unsightly and dangerous if the springs break. Furthermore, the latter has the disadvantage that the door arm is long, making it difficult to install depending on the structure of the garage.

The purpose of the present invention is to provide good appearance, high safety,
Moreover, the object is to provide a compact shock absorbing mechanism.

[Means for solving problems]

In order to achieve this object, the present invention provides a trolley with a cylindrical hollow part extending in the direction of trolley movement, which is formed between both side plates by bulging the opposing side plates outward, and a cylindrical hollow part is formed in the bulging part of the side plate. an elongated hole in the trolley movement direction; a pin that engages with the elongated hole to connect the door arm to the trolley; and a spring that is housed in the hollow and elastically restricts movement of the pin within the elongated hole. It is characterized by having the following.

[Effect]

Shocks generated on the door or drive source are absorbed by the pin moving along the elongated hole while compressing the spring. By contracting this spring into the cylindrical hollow space formed between the side plates by the bulges of the opposing side plates that make up the trolley and enclosing it, the trolley has a good appearance and is highly safe. , and it becomes smaller.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 9.

Generally, a garage door opening/closing device, as shown in FIG. The main part of the trolley 4 is connected to a roller chain that moves horizontally. The main body 1 is hung on the ceiling of the garage with a hanging bracket, while the end of the rail 2 is fixed to a part of the garage with a header bracket 5. On the other hand, the garage door 6 is generally
It is divided into several pieces, connected to each other, and 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 it is in a balanced state such that it can be opened and closed by human power. 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 along the door rail 7 in conjunction with the roller chain operated by the driving force of the main body 1 and the trolley 4 which moves horizontally along the rail 2 by the operation of the roller chain. It opens and closes.

Power is supplied to the main body 1 via a power cable 11. Further, an operation command to the main body 1 is given by pressing a push button switch 12 of a controller 13 attached to the wall of the garage, or by wireless remote control using radio waves or the like.

In addition, in the unlikely event that the garage door opening/closing device becomes inoperable due to a power outage, etc., the detachment cord 14
By pulling, the roller chain and the trolley 4 are disconnected, and the garage door 6 is manually opened.
can be opened and closed independently.

Next, the structure of the main body of the garage door opening/closing device will be explained with reference to FIGS. 5 and 6. Figure 5 is a longitudinal side view;
FIG. 6 is a partially cross-sectional top view.

Motor 1 fixed to the lower side of main body frame 15
The rotation of 6 is transmitted from a motor pulley 17 fixed to a motor shaft 16-a to a large pulley 19 via a V-belt 18. Furthermore, the large pulley 19
rotation is transmitted to the sprocket 21 via the sprocket shaft 20. The sprocket 21
A roller chain 3 is engaged with the roller chain 3. The roller portion of the roller chain 3 is guided from both sides within the main body frame 1 by a chain guide (A) 22, a chain guide (B) 23, and a chain guide (C) 24. The rail 2 is attached to the chain guide (A) 2 by the rail fixing fittings 25 on the frame 15.
2 and the groove formed by the chain guide (C) 24 so that there is no difference in level or gap between them. 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 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 step or gap. Chain storage groove 27 of barrel chain storage case 27
- done by 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, a limit mechanism that limits 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, 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 pulley rack 2
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 meshing with the pulley rack 8. The upper limit switch 30 and the lower limit switch 3
1 is provided with an upper limit point adjustment knob 32 and a lower limit point adjustment knob 33, thereby making it possible to freely adjust the upper limit point and the lower limit point 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, raise; and if the garage door hits an obstacle while ascending, It is desirable to quickly detect this and stop it.

Such an obstacle detection mechanism 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 that is moved by the force generated by each of the tensile forces applied to the door lift.
will be established. Obstruction spring 3 regulating movement of the obstruction detection fitting 34
The compression force of No. 5 can be freely changed by turning the obstruction operation force adjustment screw 36 and moving the spring presser plate 37. Furthermore, the obstruction detection switch, which is turned on and off by the movement of the obstruction detection metal fitting 34, detects that the door 6 has hit an obstacle.
When the door is lowered, it is controlled so that it reverses and rises.

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 opening/closing control of the garage door. Furthermore, a controller 39 for controlling the motor 16 and the lamp 38 is fixed within the frame 15, and the motor 16, large pulley 19, lamp, and controller 39 are further covered by a main body cover 40 and a lamp cover 41. Incidentally, the lamp cover 41 is made semi-transparent to allow the light from the lamp 38 to pass therethrough, thereby brightly illuminating the inside of the garage.

FIG. 7 is a circuit diagram, in which the motor 16 is connected to a capacitor 181 and used as a reversible motor, and is controlled by a latching relay 184 via an upper limit switch 30 and a lower limit switch 31. Further, there are a push button switch 12 for commanding door opening/closing to operate the latch relay 184, and an obstruction detection switch 190, whose control power is generated by a transformer 191.
Furthermore, lighting of the lamp 38 is controlled by a 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', the motor 16 rotates in the direction of raising the door, and at the same time, the voltage between the terminals of the motor 16 causes the thermal relay 182 to
The heater section is heated, and the relay contact, which has a bimetallic structure, is turned on and lights up the lamp.
When the door reaches the upper limit, the upper limit switch 30 is turned off and the motor 16 is stopped. When the door opening/closing command push button switch 12 is turned on again, the latching relay 184 is reversed to the contact point B, B' side, and the motor 16 rotates in the door lowering direction. At this time as well, the lamp 38 is lit in the same manner as the lamp lighting operation described above. The door lowering operation is completed when the lower limit switch 33 is turned off. However, when the obstruction detection switch 190 is turned on during the door lowering operation, the relay coil of the latching relay 184 is energized, the relay contacts are reversed to the A and A' sides, and the door changes from the lowering operation to the raising operation. Invert. 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. In this control circuit, the obstruction detection operation is disabled while the door is in the rising operation. Note that the lighting of the lamp 38 described above is performed by the thermal relay 182.
After the motor 16 stops, the bimetallic contacts are automatically turned off after a certain period of time for cooling to a predetermined temperature.

Next, an embodiment of the connecting portion between the trolley 4 and the door arm 10 according to the present invention will be described with reference to FIGS. 1, 2, and 3. Figure 1 is a partially sectional perspective view;
FIG. 2 is a partially sectional side view, and FIG. 3 is a view taken along arrow A in FIG. As shown in FIGS. 1 and 3, the cross-sectional structure of the rail 2 is formed from a thin iron or plastic plate, and the trolley 4 is slidably guided on the outer periphery of the rail 2. Further, the rails 2 sandwich the roller portion of the roller chain 3 from both sides, and guide the roller chain 3 so that it can reciprocate linearly. The connection between the trolley 4 and the roller chain 3 is as follows:
This is done by inserting a connecting fitting 4-a into a groove of a roller chain attachment 3-a that is fixed to the tip of the roller chain 3 and guided together with the roller chain 3 by the rail 2. . The connecting fitting 4-a is located inside the trolley 4 and is slidable in the vertical direction, and is normally pushed upward by the force of a spring or the like, so that the connecting fitting 4-a is connected to the trolley 4. The roller chain 3 is in a connected state. In the event of a power outage, etc., if you want to separate the garage door opening/closing device from the door and open/close the door using human power, pull the connecting fitting 4-a downward and attach the connecting fitting 4-a to the roller chain. ment 3
- Do this by leaving a.

Next, the door arm 10 for transmitting the operation of the trolley 4 to the door is an L-shaped door arm 10-a.
and a straight door arm 10-b, both of which are connected with varying lengths depending on the positional relationship between the door and the rail. One end of the door arm 10 is connected to the trolley 4, and the other end is connected to the door 6 via a door bracket 9 shown in FIG. The opposite side plates of the trolley 4 bulge outward to form a partial cylindrical hollow part between them in the moving direction of the trolley 4 as shown in the figure, and the bulged part of the side plate has a hollow part in the same direction as the cylindrical hollow part. It has a long hole 4-b in the direction. A shock absorbing spring 52 is inserted into the hollow portion, a guide washer 53 is inserted, and a straight door arm 10-b is connected to the elongated hole 4-b of the trolley 4 with a pin 50.
It is prevented from coming off with a split pin 51. The pin 50 is normally pressed against the side of the elongated hole 4-b of the trolley 4 opposite to the spring, as shown in FIG. 2, by the force of the spring 52. When the door 6 is raised, it is connected in this state, and as the trolley 4 moves, the door arm 1
The door 6 connected to 0-a and 10-b moves. When the door is lowered, under normal door load, it moves at the position of the pin 50 shown in FIG. By moving guided by the elongated hole 4-b against the spring force of Reduce the force, etc. Furthermore, if the floor surface rises due to ice formation or the like when the garage door 6 is closed, the spring 52 absorbs the rise and protects the bottom of the door and the door opening/closing device. Furthermore, even if the floor surface is swollen due to snow accumulation, ice formation, etc., or if there is a small item such as a water hose, it is necessary to take measures to prevent the door from turning over by detecting obstruction when the door is lowered. That is, it is necessary to stop and not turn around even if an obstacle is detected below 2 inches above the floor surface, and in this case as well, the amount of movement is absorbed by the spring 52.

As mentioned above, a shock absorption mechanism is usually required only on the lowering side of the door, but depending on the drive method etc.
In some cases, a shock absorption mechanism is required on both sides to absorb shock during driving. FIG. 8 shows another embodiment of the present invention in such a case, and FIG. 9 is a sectional view of FIG. 8. Shock-absorbing springs 52-a and 52-b are provided on both sides of a pin 50 in the cylindrical hollow portion of the trolley 4, and door arm connectors 54 are engaged with both ends of the pin 50. Normally, both springs 52-a, 52-
Pin 50 at the position where the spring force of b is almost 0 (no compression)
has stopped and is in the state shown in FIG. When the door is lowered, the spring 52-b absorbs the impact force, and when the door is raised, the spring 52-a absorbs the impact force. The spring forces of the springs 52-a and 52-b on both sides may be the same or may be different.

〔Effect of the invention〕

As described above, according to the present invention, the spring constituting the shock absorption mechanism at the connecting portion between the trolley and the door arm has a cylindrical shape formed between the side plates by bulging the opposing side plates outward to constitute the trolley. Since it is stored in the hollow part of the case, it looks good and is safe even if it gets damaged. Furthermore, since the door arm can be shortened, the overall size can be reduced and the applicability and handling properties can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional perspective view showing an embodiment of a connecting part in a door opening/closing device according to the present invention, FIG. 2 is a partially sectional side view of the same, and FIG. 3 is a view taken in the direction of arrow A in FIG.
Fig. 4 is an overall perspective view of the garage door opening/closing device, Fig. 5 is a vertical cross-sectional side view of the main body, Fig. 6 is a cross-sectional top view of the same part, Fig. 7 is a control circuit diagram, and Fig. 8 is a connection according to the present invention. FIG. 9 is a partially sectional side view showing other embodiments of the section, FIG. 9 is a partially sectional front view of the same, FIGS.
The figure is a side view of a connecting portion in a conventional device. 2...Rail, 3...Roller chain, 4...Trolley, 4-b...Elongated hole, 6...Door, 10...Door arm, 50...Pin, 52...Spring.

Claims (1)

[Claims] 1. A main body with a built-in drive device, a rail connected to the main body, a trolley that is driven by the drive device and moves on the rail, a door arm for connecting the trolley to a door, and the trolley and the door arm. It is attached to the ceiling of the garage with a spring that elastically connects it, and drives the door to be opened and closed by moving up and down along the door rails installed on both sides of the garage. In the door opening/closing device which absorbs the impact force of the collision by the spring force of the spring when it collides with an object, the trolley is formed between the two side plates by bulging the opposing side plates outward. a cylindrical hollow part extending in the trolley moving direction, an elongated hole formed in the bulging part of the side plate in the trolley moving direction, and a pin that engages with the elongated hole to connect the door arm to the trolley. . The door opening/closing device, wherein the spring is housed in the hollow portion and absorbs the impact force by elastically restricting movement of the pin within the elongated hole.