JPS6311548B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roller chain drive device, and in particular,
The present invention relates to a roller chain drive device that is most suitable for enabling a driven member to reciprocate along a guide means.

A garage door opening/closing device will be described as an application example of a reciprocating device using a roller chain.

In general, a garage door opening/closing device, as shown in FIG. It consists of the main part of a horizontally moving trolley 4 which is fixed to an operating roller chain 3. 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 along 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 is opened and closed. Power is supplied to the main body 1 through a power cable 11
It is done via.

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 connection between the roller chain 3 and the trolley 4 is disconnected using the release string 14, and the garage door 6 is manually opened. can be opened and closed independently.

Particularly preferable conditions that the rail 2 should have in the garage door opening/closing device having the above configuration are as follows.

1. It is possible to guide the horizontal movement of the trolley 4 and to guide the reciprocating roller chain 3. Here, a tensile force is applied to the roller chain 3 when the door 6 is raised, and a compressive force is applied when the door 6 is lowered. In particular, when compressive force is applied to the roller chain 3, it tends to bend outward due to buckling, but this must be reliably regulated.

2. When the door is raised or lowered, force is applied downward and upward at the trolley position as a reaction force of the door arm.Furthermore, lateral force is applied during transportation, installation in a garage, etc., so
It must be strong enough to withstand forces applied in the lateral direction.

3. The required opening/closing movement of a garage door is 7 to 8 feet, so the rail needs to be longer than this. Therefore, the rail needs to be able to be divided into two or three parts for portability.

4. According to item 3 above, the rail 2 must be simple, and the guide portions of the trolley 4 and roller chain 3 must have a structure that allows reliable and strong connection so that steps and gaps are reduced.

5. For the reason in item 3 above, the rail 2 must be sufficiently lightweight, and must also be sufficiently resistant to wear caused by the sliding parts of the roller chain 3.

SUMMARY OF THE INVENTION An object of the present invention is to provide a roller chain drive device equipped with a guide means that can guide both a roller chain and a driven member.

The features of the present invention are as follows.

The cross-sectional structure of the rail is a cylindrical body with guide grooves in the guide direction in the roller chain guide section, so that the trolley is guided on its outer periphery (upper surface, side surface, and lower surface), and the roller chain is guided on the edge surface of the dividing groove. It's because I did it.

First, the structure of the main body of the garage door opening/closing device will be explained with reference to FIGS. 2 and 3. Figure 2 is a longitudinal side view;
FIG. 3 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 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. rail 2
The chain guide (A) 22 and the chain guide are attached to the frame 15 by the rail fixing fittings 25.
(C) It is fixed to the groove formed by 24 without any step or gap. 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 the chain guide.
(A) 22 and the chain guide (B) 23, and the chain storage groove 27-a of the chain storage case 27, which is fixed without any step or gap. 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. 1, 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. The upper limit switch 30 and the lower limit switch 31 are provided with an upper limit point adjustment knob 32 and an upper limit point adjustment knob 33, respectively, so that the upper limit point and the lower limit point can be freely adjusted from outside the main body.

If the garage door hits an obstacle while descending, it must be detected quickly for safety reasons and must be reversed, i.e., raised; Detect quickly,
Must stop. The obstacle detection mechanism described above will be explained below. Above, chain guide (A) 22, chain guide (B) 23, and chain guide (C)
A part of the chain guide groove formed by 24 is formed into a curved path, and the object is moved by the force generated by the compressive force applied to the roller chain 3 when the door is lowered, and the tensile force applied when the door is raised. A traction detection fitting 34 is provided. 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, the obstruction detection switch 52, which is turned on and off by the movement of the obstruction detection metal fitting 34, detects the above-mentioned obstacle and causes the door to rise when the door is lowered and to stop when the door is raised. do.

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 front roller 39 that controls the motor 16 and the lamp is mounted on the frame 1.
The motor 16 and the large pulley 1 are
9. Cover the lamp 38. Incidentally, the lamp cover 41 is semi-transparent and allows the light of the lamp 38 to pass therethrough, thereby brightly illuminating the inside of the garage. Having described the main body structure of the garage door opening/closing device above, the rail and trolley portion will now be described with reference to FIG. 4. As shown in FIG. 4, the cross-sectional structure of the rail 2 is a thin iron plate or plastic plate formed into a convex cross-section, and the trolley 4 is slidably guided on the outer periphery of the rail.
Further, the rails 2 sandwich the roller portions of the roller chain 3 from both sides, and guide the roller chain 3 to perform reciprocating motion linearly. Next, the trolley 4 and the roller chain 3 are connected by a connecting metal fitting fixed to the tip of the roller chain 3 and in a groove of a roller chain attachment 3-a guided by the rail 2 in the same way as the roller chain 3. 4-a. The connecting fitting 4-a is located inside the trolley 4 and can slide up and down, and is normally pushed upward by the force of a spring or the like. 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 manually,
This is done by pulling the connecting fitting 4-a downward and separating it from the roller chain attachment 3-a. Next, the door arm 10 for transmitting the operation of the trolley 4 to the door is composed of an L-shaped door arm 10-a and a straight door arm 10-b, each of which can be freely lengthened depending on the positional relationship between the door and the rail. They are connected by changing the size. 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 door arm 10
The trolley 4 is connected to the trolley 4 by providing a long groove 4-b in the trolley 4 and inserting a pin 4-c into the long groove 4-b and a hole in the door arm 10 in common. The pin 4-c is normally pressed to the state shown in FIG. 4 (left end in the figure) by a spring provided within the trolley 4. This is to absorb shock when the door collides with an obstacle while lowering. In addition, the garage door opening/closing device has measures to prevent it from reversing by detecting obstruction when the door is lowered, even if the floor is piled up with snow, ice, etc., or if there is a small item such as a water hose. is necessary. In other words, it is necessary to stop and not turn around even if an obstacle is detected at a height of 2 inches or less above the floor surface. In this case, the difference in the amount of movement between the trolley 4 and the door 6 is absorbed by the long groove 4-b.

Next, the rail of the present invention will be described in detail below.
As shown in Fig. 5, the cross-sectional shape of the rail is a cylindrical body with guide grooves 2-i formed by molding a thin plate into which the rollers of the roller chain are inserted from both sides, and Projection 2- almost in the center
By forming the protrusions 2-j, the cross section is made to have a substantially convex shape, but the reason for forming the protrusions 2-j is to ensure that the protrusions 2-j are strong enough to withstand forces applied in both the vertical and lateral directions. , and to be used as a fastening part when reliably connecting rails divided in the length direction to each other. Furthermore, since the sliding part (edge of the guide groove) with the roller chain 3 wears out due to repeated motion, the plate is folded back only at the sliding part of the roller chain, as shown in Fig. 5, to reduce the thickness of the other parts. It is almost twice as thick as the original.

As a result, the cross-section of the rail can be formed into a shape sufficient to obtain the necessary strength and wear resistance by forming a lightweight thin plate, and it is also possible to sufficiently reduce the weight. In terms of materials, considering marketability, strength, etc.
A thin copper plate is preferable, but aluminum, plastic, etc. can also be used to further reduce weight.

Next, the connection of the rails shown in FIG. 5 will be explained with reference to FIGS. 6 and 7. Rail (A) 2-a, and rail (B)
Two rail holes 2-c are provided at each end of the rails 2-b, each of which is machined with high precision by pressing or other precision processing means. On the other hand, the connecting pieces 2-d, which are inserted without any gaps along the inner surfaces of the rail (A) 2-a and the rail (B) 2-b, are provided at both ends with the same pitch as the rail holes 2-c. Two connecting piece holes 2-e are each formed with high accuracy by a press or other precision processing means.

With the above configuration, rail (A) 2-a and rail (B)
2-b, first attach the connecting piece 2 to either rail (A) 2-a or rail (B) 2-b.
-d, align the rail hole 2-c with the connecting piece hole 2-e, and firmly fasten it with a fastening means such as a bolt 2-f. In this case, as shown in FIG. 7, the fastening means is a stepped portion having a length approximately equal to the width of the protrusion 2-j of the rail (A) 2-a and rail (B) 2-b. By using the stepped bolt 2-f having a diameter, the amount of tightening of the nut 2-g is regulated, and deformation of the rail (A) 2-a and rail (B) 2-b due to over-tightening, especially the rollers. It is possible to prevent deformation of the chain guide portion and keep the width dimension of the roller chain guide portion constant.

Further, the spring washer 2-h is important for preventing the stepped bolt 2-f and nut 2-g from loosening.

With the above, one rail and connecting piece 2-d
are firmly fastened.Next, in the same manner, insert the connecting piece 2-d into the other rail, align the connecting piece hole 2-e with the rail hole 2-c, and then tighten the stepped bolt 2-d. Tighten firmly using fastening means such as f, nuts 2-g, and spring washers 2-h. Now, the rail (A) 2-a and the rail (B) 2-b are easily and reliably connected. In this way, the rail hole 2-
It is obvious that the gap between the end faces of the rail (A) 2-a and the rail (B) 2-b can be kept small by properly determining the dimensions of the connecting piece hole 2-e and the connecting piece hole 2-e. Furthermore, one of the connecting pieces 2-d
It is also clear that by properly determining the cross-sectional dimensions of rail (A) 2-a and rail (B) 2-b, it is possible to minimize the discrepancy between the roller chain sliding portion and the trolley sliding portion. The rail 2 is fixed to the garage using a header bracket 5 at the protrusion 2-j at the end opposite to the main body.

Next, referring to FIG. 8, the state in which the roller chain and trolley are mounted on the rail will be explained.

FIG. 8 shows a - cross section of FIG. 4.

The trolley 4 slidingly guided along the outer peripheral surface of the rail 2 has a trolley side plate (A) 4-d and a trolley side plate (B).
4-e are connected at a predetermined interval by a caulking pin 4-f, and the bulges of the two rails are connected from the bottom side of the rail 2 by both trolley side plates 4-d and 4-e. It hugs the outside. On the other hand, the roller chain 3 is slidably guided by being sandwiched between the guide grooves 2-i on the lower surface of the rail 2. Here, both the trolley side plates 4-d, 4
The trolley 4 and the roller chain 3 are connected by the attachment 3-a and the connecting fitting 4-a, which is sandwiched between the two parts 4-e and movable up and down. That is,
Pin (A) 4-g is connected to both trolley side plates 4-d and 4-e.
The pin (B) 4-h is fixed to the connecting fitting 4-a.
Fixed. Pin (A) 4-g is connecting fitting 4-
Penetrates through the elongated hole 4-i in the vertical direction provided in a,
The pin (B) 4-h engages with vertical long grooves 4-j and 4-K opened at the lower edges of both trolley side plates 4-d and 4-e, and is connected between both pins 4-g and 4-h. tension spring 4-
By hooking 1 and 4-m, the connecting fitting 4-
a is pushed up to engage the upper end of the connecting fitting 4-a with the attachment 3-a to connect the trolley 4 and roller chain 3. The roller chain 3 and the trolley 4 are separated by pulling the connecting fitting 4-a with tension springs 4-l, 4-
This is done by pulling down against the direction m to separate the upper end of the connecting fitting 4-a from the attachment 3-a.

We have explained the connecting rails above, but if there is no need to connect the rails and it can sufficiently withstand the forces applied in the vertical and lateral directions, a rail with a cross-sectional shape like a cross-section as shown in Figure 9 is sufficient. . That is, it is sufficient to form a divided cylindrical body in the roller chain guide section, slidingly guide the trolley on the top, side, and bottom surfaces, and guide the roller chain on both divided sides of the rail. It is also important to stack two plates only in the roller chain guide portion to reduce surface pressure and wear.

Next, an embodiment of the control device will be described with reference to FIG. 12 is a push button switch for commanding door opening/closing operations, 201 is a relay contact output for commanding door opening/closing operations also from the radio receiving device, 30 is a door upper limit switch, 31 is a door lower limit switch, 52 is an obstacle detection limit switch, 205
206 and 207 are monostable multivibrators; 208 is a J-K master slave flip-flop; 209 is a timer circuit using NE555 (manufactured by Signtech), etc.; 210 , 211 is D
type flip-flop, 212 is an integrating circuit, 2
13 is a differential circuit, 214 to 222 are NOT elements,
223 is a 2-input OR element, 224 to 228 are 2-input AND elements, 229 and 230 are 4-input NOR elements, 231 is a 2-input NOR element, and 232 is a 3-input NOR element.
AND element, 233 is a control power transistor,
234 is a diode stack, 235 is an IC regulator for control power supply, 236 to 238 are relay drive transistors, 239 to 241 are relay coils, 242 to 244 are the relay contacts, 245 is a door opening/closing drive motor, and 38 is a lamp. It is.

The circuit operation will be explained below with reference to time charts shown in FIGS. 11 and 12. When the power is turned on to this circuit, the circuit is connected from the transformer 233 to the diode stack 234 and further to the IC regulator 235.
A control power supply VDD is supplied via. Then,
The power supply reset circuit 205 integrates the rise of VDD and outputs a reset pulse through the NOT element 215. The reset pulse is the NOT element 21
6, the JK master slave flip-flop 208 is reset, and the D-type flip-flops 210, 211 are reset via the 4-input NOR elements 229, 230, respectively. The push button switch 12 which is the door opening/closing operation command or the relay contact output 201 from the wireless receiving device is turned on and NOT
If signal A is output by element 214, monostable multivibrator 206 outputs signal B with pulse width T1 at the rising edge of signal A. The signal B is outputted as a signal C via a 2-input OR element 223 and a 2-input AND element 224. Signal C is J-
The output of the two-input AND element 226 is input as the clock of the flip-flop 201 during the high (HiGH) period of the signal C before the output signal E is inverted. 210
is set and signal F is output. This is a door raising command, and the relay coil 240 for raising the door is energized by the transistor 237.
The relay contact 242 is turned on and the motor 16 rotates normally. The motor is started in this manner, and at the same time signal B is input as a trigger signal to the timer circuit 209 via the NOT element 221. The purpose of this is to turn on the lamp 38 that illuminates the garage for a certain period of time after the operation command is given at the same time as the motor is started.The output of the timer circuit 209 excites the relay coil 239 by the transistor 236, Turn on relay contact 244. In this way, lamp 246 can be lit for a certain period of time. Next, when the upper limit switch 30 is turned on while the ascending command is being output,
The reset of the flip-flop 210 is inputted through the NOT element 217 and the 4-input NOR element 229,
Transistor 37 turns off and relay coil 240
is demagnetized, relay contact 242 turns off, and motor 1
6 stops. Furthermore, when the operation command is turned on again, that is, the push button switch 12 or the relay contact output 201 from the wireless receiver is turned on while the ascending command is being output, the pulse of signal B is output from the monostable multivibrator 206 as described above, and the OR element 223 It is output from However, flip-flop 210
is set, the two-input AND element 22
The output of 8 is low (LOW), and the 2 inputs
The output of AND element 224 is prohibited. At this time, the 2-input AND element 227 is connected to the NOT element 218.
Since the output becomes high (HiGH), the pulse of signal B is output as signal D. This signal D is 4
It is input as a reset signal to the flip-flop 210 via the input NOR element 229. In this way, the motor 16 is stopped as before. Next, when further operation commands are input in the same manner as above,
Since the J-K master slave flip-flop 208 is set, the 2-input AND element 226
The output of is prohibited, and the signal B is output from the two-input AND element 225, which sets the flip-flop 211 and outputs the signal G. As a result, the transistor 238 is turned on, energizing the relay coil 241 for lowering the door, the relay contact 242 is turned on, the motor 16 is rotated in reverse, and the door is lowered.
When the lower limit switch 31 is turned on during the lowering operation, a signal H is output from the NOT element 219, and after a time delay T2 is provided by the integrating circuit 212, it is input as a reset signal to the flip-flop 211 via the 4-input NOR element 230. be done.
This causes the motor to stop in the same way as when the upper limit is turned on during upward movement. Next, the circuit operation when the obstacle detection limit switch 52 is activated will be explained. During the rising operation, that is, J-K master slave flip-flop 208 is set, flip-flop 210 is set, and flip-flop 2 is set.
11 is reset, when the obstacle detection limit switch 52 operates, the limit switch 52 turns off because it uses a B contact.
2-input NOR element 231 via NOT element 220
A high (HiGH) signal is output from , which triggers the monostable multiviprator 207 . The Q output pulse of the multivibrator 207 is 4 inputs.
Flip-flop 2 via NOR element 2229
Reset 10. Also, at this time, the output of the 4-input AND element 232 is prohibited because the JK master-slave flip-flop 208 is set. Next, when the obstacle detection limit 52 is operated in the same manner as described above during the descending operation, that is, when the J-K master slave flip-flop 208 is reset, the flip-flop 210 is reset, and the flip-flop 211 is set, the obstacle detection limit 52 is activated as described above. A signal J is outputted from the element 220, and a signal K having a pulse width T3 is outputted from the monostable multivibrator 207 via the two-input NOR element 231. 4 inputs depending on the signal K
Through the NOR element 230, the flip-flop 2
11. This stops the motor and also stops the lowering movement of the door. When the pulse signal K further falls, the output of the monostable multivibrator 207 rises, and the 3-input AND element 2
32 goes high (HiGH) and a signal L is output. The signal L is sent to the differentiating circuit 213 and the NOT element 22.
2, it is converted into a signal M, and is input to a two-input OR element 223. As a result, a series of control paths are followed as described above, and signal F, which is a raising command, is output, the door is raised, and the upper limit switch 3 is activated.
The output signal N of the NOT element 217 is a signal of 0.
The door will stop. In this way, when the door detects an obstacle, it immediately stops operating while rising, and when descending, it immediately stops descending, and resumes ascending after T3 hours, ensuring safe operation. However, in order to prevent the obstacle detection operation from inadvertently operating due to small obstacles (stones, sticks, etc.) near the lower limit of the door or rising ground due to snow in winter, the lower limit point switch 31 is turned on. The obstacle detection operation is immediately prohibited by the two-input NOR element 231, but the signal G, which is a descending operation command, is
It is reset by signal I after a time delay T2 of 2. This control operation allows the door to be opened and closed safely without any problems.

As explained in the above embodiments, the present invention can provide a rail that can both guide the horizontal movement of a trolley and guide a reciprocating roller chain, and can realize a good roller chain drive device. is very large.

[Brief explanation of the drawing]

Figure 1 is an overall installation diagram of the garage door opening/closing device.
FIG. 2 is a sectional side view of the main body of the garage door opening/closing device, and FIG. 3 is a top view. Fig. 4 is a rail and trolley installation diagram, Fig. 5 is a cross-sectional view of the rail, Fig. 6 is a diagram of the rail connection state, Fig. 7 is a cross-sectional view of the rail connection, Fig. 8 is a cross-sectional view of Fig. 4, and Fig. 9 is a cross-sectional view of the rail. The figure is a sectional view of a rail in another embodiment, FIG. 10 is a control circuit diagram, and FIGS. 11 and 12 are timing charts. 2...Rail (guiding means), 3...Roller chain, 4...Trolley (driven member), 16...
Motor (driving means), 21... sprocket.

Claims (1)

[Scope of Claims] 1. A driving motor, a sprocket rotated by the motor, a roller chain with an end engaged with and driven by the sprocket, and a roller chain connected to and moved by the roller chain. In a roller chain drive device equipped with a guide means for guiding a driven member, the guide means is a cylindrical body provided with a guide groove extending in the guide direction, and the roller portion of the roller chain is sandwiched in the guide groove, and the guide groove edge is A roller chain driving device characterized in that the driven member is guided by a surface and is guided by engaging the driven member with an outer circumferential surface of a cylindrical body. 2. The roller chain drive device according to claim 1, wherein the edge surface of the guide groove of the guide means is made thick. 3. A driving motor, a sprocket rotated by the motor, a roller chain with an end that engages with the sprocket and is driven, and guides the roller chain and a moving member connected to the roller chain. In the roller chain drive device, the roller portion of the roller chain is formed of a convex cross-sectional body having a guide groove extending in the guide direction on the lower surface thereof and a protrusion extending in the guide direction on the upper surface of the guide means. is inserted into the guide groove and guided by the edge surface of the guide groove,
A roller chain drive device characterized in that the driven member is engaged with the guide means by hugging the outer periphery of the bulging portion of the guide means from below. 4. The roller chain drive device according to claim 3, wherein a mounting screw hole is formed in the protrusion. 5. The roller chain drive according to claim 3, characterized in that the protrusion is hollow, and a connecting member is inserted into the hollow portion to connect the guide means divided in the length direction. Device.