JPS6299Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is used for shutters, cranes, conveyors,
This invention relates to a forward/return end opening/closing device for an elevator or the like.

Conventionally, for example, the upper and lower end opening/closing devices of a shutter, as shown in Fig. 1, have been supported in conjunction with a shutter opening/closing drive motor (not shown) or a shaft that rotates at a fixed ratio with the drive motor so as to be able to decelerate in the forward and reverse directions at a fixed position. A pair of actuators 2, 3 in the shape of a disk having a large number of locking recesses 2a, 3a formed on the outer periphery of a threaded rod 1.
At the same time, a locking rod 5 disposed parallel to the threaded rod 1 and biased toward the actuators 2 and 3 by a coil spring 4 is inserted into the locking recesses 2a and 3.
There was one in which the actuators 2 and 3 could be moved left and right when the threaded rod 1 rotated forward and backward when engaged with the lever a. A limit switch 6 is provided at a predetermined position below the actuators 2 and 3 to stop the drive motor when the shutter is opened.
A limit switch 7 is provided to stop the drive motor when the shutter is closed, and when the actuators 2 and 3 are moved left and right, the lower ends thereof are connected to the leaf levers 6a and 7a of the limit switches 6 and 7.
and presses the plungers 6b and 7b,
The limit switches 6 and 7 were turned off to stop the drive motor.

However, the limit switches 6 and 7 were turned OFF.
In operation, the actuators 2 and 3 move and gradually come into deeper contact with the leaf levers 6a and 7a, and the plunger 6
Since the actuators 2 and 3 are turned off by pressing them downward to the operating position, and since the actuators 2 and 3 advance only one thread pitch per rotation of the screw rod 1, the limit switches 6 and 7 are turned off, respectively. OFF
It was not accurate at what position on the threaded rod 1 the actuators 2 and 3 should be turned off. Therefore,
Fine adjustment of the operating points of the limit switches 6 and 7 could not be performed accurately and relied solely on intuition. What's more, during this assembly adjustment work, you have to go up and watch the shutter fully open position.
In addition, at least two workers are required: one to adjust the shutter's upper and lower end opening/closing devices, and the other to monitor the fully closed position of the shutter, and to drive and stop the drive motor.

Furthermore, when the actuators 2 and 3 are at a position displaced from the predetermined position of the screw rod 1 during the initial assembly adjustment, the screw rod 1 rotates too much, causing the actuators 2 and 3 to displace the screw rod 1. The screw had to be removed from the threaded portion and manually screwed back together and readjusted, and the assembly and adjustment work was extremely troublesome.

The purpose of this invention is to eliminate the above-mentioned defects and simplify the initial assembly and adjustment work of the shutter, etc., and to provide a forward and backward end opening/closing device that can accurately set the operating point of the limit switch. is to provide.

An embodiment in which this invention is applied to a shutter opening/closing device will be described below with reference to the drawings.

Reference numeral 11 denotes a mounting frame which is integrally formed into a rectangular shape from the front, and has bolt locking recesses 12 formed at its four corners. Reference numeral 13 denotes a cross-sectional mounting side wall fixed to the front surface of the mounting frame 11, and a case 15 housing a bearing 14 is fixed to both left and right outer surfaces of the mounting side wall 13.

Reference numeral 16 is a threaded rod rotatably supported at a fixed position with respect to the bearing 14, and a driven sprocket wheel 17 is fixed to the left end protrusion of the screw rod. And the driven sprocket wheel 17
A chain (not shown) is attached to the shaft, and the shaft is connected via a speed reducer (not shown) to a drive motor (not shown) that can be rotated forward and backward for opening and closing the shutter, or to a shaft that rotates at a constant ratio with the drive motor (not shown). .

Reference numeral 18 denotes a disc-shaped actuator made of synthetic resin that is screwed onto the threaded portion 16a of the threaded rod 16 in pairs on the left and right sides, and has a large number of locking recesses 18a formed on its outer periphery as shown in FIG. ing. Reference numeral 19 denotes a case-shaped housing/holding member made of synthetic resin that accommodates the pair of left and right actuators 18, and is disposed such that its upper opening surface slides on the upper inner surface of the mounting side wall 13. Reference numeral 20 denotes a circular hole transparently provided in the center of both the left and right outer surfaces 19a and 19b of the housing and holding member 19, and a projection provided in the center of both sides of the actuator 18 as shown in FIG. 1
8b penetrates. Reference numeral 21 denotes a pair of front and rear switch pressing pieces formed by cutting upward from both the front and rear lower end surfaces of the housing and holding member 19, and when force is applied outward, the housing and holding member 19 made of a flexible material is pressed. It opens outward centering on the upper proximal end against the elastic force, and returns to its original position when the force is released.

Reference numeral 22 denotes a locking convex portion protruding from the inner surface of the central portion of the switch pressing piece 21, and as shown in FIG.
8a to prevent rotation of the actuator 18,
The actuator 18 is allowed to move in the axial direction. 23 is the threaded portion 1 of the threaded rod 16
6a is a cylindrical stopper made of synthetic resin that is screwed into the outer periphery of both left and right ends and fixed with screws 23a, and this stopper 23 forms a stepped portion at both ends of the threaded rod 16, and the inner end surface thereof is He is trying to lock the protrusion 18b of the actuator 18. Therefore, the actuator 18 that moves in the axial direction and is locked by the stopper 23 is prevented from moving in the axial direction, and at the same time, a large rotational force is applied to the actuator 18, so that the actuator 18 moves in the locking recess 1.
In order to forcibly release the engagement between the locking protrusion 8a and the locking protrusion 22, the switch pressing piece 21 is opened outward. If the actuator 18 is not set correctly yet, move the mover 18 and lock it to the stopper 23, and move the switch pressing piece 21 together with the stopper 23 at the locked position. If the actuator 18 is rotated while being released, the actuator 18
is automatically set to the correct state. Therefore,
After the actuator 18 is automatically set, there is no need to manually rotate the actuator 18 to fine-tune the accurate set position.

24 is a screw 25 attached to the lower left inner surface of the mounting side wall 13 so as to correspond to the left actuator 18.
and the actuator 18 is on the left side stopper 2.
3, the limit switch is actuated by the outward expansion of the switch pressing piece 21 to stop the drive motor for opening and closing the shutter, and the limit switch 24 and the switch pressing piece 21 are The positional relationship is such that when the left actuator 18 is locked to the left stopper 23, the shutter is fully opened by the drive motor, and at the same time the switch pressing piece 21 pushes the plunger 24b via the leaf lever 24a of the limit switch 24. It is set in advance so that it can be pressed.

26 is a screw 27 attached to the lower right inner surface of the mounting side wall 13 so as to correspond to the right actuator 18, and when the actuator 18 is locked to the right stopper 23, the switch pressing piece 21
This is a limit switch that is activated by opening outward to stop the drive motor for opening and closing the shutter. When the shutter is stopped, it is preset so that the switch pressing piece 21 can press the plunger 26b via the leaf lever 26a of the limit switch 26 at the same time as the shutter is completely closed.

Next, the electric circuit of the shutter opening/closing device constructed as above will be explained according to Fig. 7.
One end of each limit switch 24, 26 is connected to a common power supply line 31, and the other terminal of the left limit switch 24 is connected to a control circuit (not shown) to stop the drive motor that is being driven to open the shutter. The other terminal of the limit switch 26 on the right side sends a stop signal to a control circuit (not shown) to stop the driving motor to close the shutter. It is connected to the sending lead wire 33.

Therefore, the left limit switch 24 is OFF.
(at the same time as the shutter is fully opened by the drive motor), an OFF signal (stop signal) is sent to the control circuit via the lead wire 32, and the drive motor is stopped. On the other hand, the limit switch 26 on the right side
When the shutter is turned OFF (at the same time as the shutter is completely closed by the drive motor), an OFF signal (stop signal) is sent to the control circuit via the lead wire 33, and the drive motor is stopped.

Reference numeral 34 is an auxiliary circuit, in which one end of a manual changeover switch 35 is removably connected to the power supply line 31, and the other two terminals are connected to each of the lead wires 3, respectively.
It is removably connected to 2 and 33. and,
Using the auxiliary circuit 34, it is possible to control the driving and stopping of the drive motor when adjusting the assembly of the shutter opening/closing device. The auxiliary circuit 34 is designed to be removed after the shutter opening/closing device is assembled and adjusted.

Next, the operation of the shutter opening/closing device constructed as described above will be explained.

Now, when assembling and adjusting this switchgear,
For example, when the shutter is fully open, the left actuator 18 is moved to the stopper 23 as shown by the solid line in FIG.
The leaf lever 24a of the limit switch 24 is arranged so as to be pressed via the switch pressing piece 21 as shown by the two-dot chain line in FIG. On the other hand, the right actuator 18 may be arranged at a predetermined distance from the right stopper 23, that is, so that the right actuator 18 is stopped by the right stopper 23 when the shutter is closed. If the actuator 18 on the right side is closer to the stopper 23 than the predetermined distance, the actuator 18 on the right side will close to the stopper 23 before the shutter is completely closed.
It gets stuck. At this time, in the embodiment of the present invention, a large rotational force is applied to the actuator 18, and the switch is pressed in order to forcefully release the engagement between the locking recess 18a and the locking protrusion 22 provided on the switch pressing piece 21. Since the pressing piece 21 is intermittently expanded outward and rotates together with the stopper 23 at the locked position, even if the threaded rod 16 continues to rotate, the actuator 18
It is possible to prevent damage to the threaded part of the threaded rod 16,
In addition, the actuator 18 can be stopped at a predetermined position (at the time of activation of the limit switch 26) without the actuator 18 coming off the threaded portion 16a of the threaded rod 16, and therefore the actuator 18 can be easily adjusted. be able to.

When performing this assembly adjustment, the driving of the drive motor is not stopped by operating the limit switches 24 and 26, but by using the auxiliary circuit 24 to turn the manual open/close switch 35.
By turning it off, the drive stop of the drive motor is controlled. Therefore, during assembly adjustment, the right actuator 18 expands the switch pressing piece 21 of the accommodation holding member 19 and turns off the limit switch 26 before the shutter is completely closed.
Even if the shutter is completely closed but the limit switch 26 is not turned OFF, the drive motor can be started or stopped, making assembly and adjustment work very easy. Become.

Now, when the shutter is fully opened after assembly and adjustment (as shown in Figure 2), press the push button switch (not shown) to close the shutter.
The drive motor is reversed and the shutter is moved downward, and the drive motor rotates the threaded rod 16 clockwise in FIG. It is engaged with the locking convex portion 22 and moved to the right while moving the housing and holding member 19 to the right. Furthermore, when the drive motor rotates and the shutter is completely closed, the right actuator 18 is locked to the stopper 23, as shown by the two-dot chain line in FIG.
The right housing and holding member 19 is also moved to a position facing the limit switch 26 by the right actuator 18. Similarly, the switch pressing piece 21 is expanded by the actuator 18 to actuate the limit switch 26 and the drive motor is automatically stopped.

Also, when changing the shutter from a completely closed state to a completely open state, when a push button switch (not shown) for opening the shutter is pressed, the drive motor rotates forward and the shutter is moved upward.
The screw rod 16 is rotated counterclockwise in FIG. 3, and the pair of left and right actuators 18 are moved to the left in the opposite direction. Then, in the same way as above, the left actuator 18 expands the switch pressing piece 21 to actuate the limit switch 24, and the drive motor is automatically stopped in the same way.

In this way, on the outside of the pair of left and right actuators 18,
When the protrusion 18b of the actuator 18 is locked with the stopper 23, a switch pressing piece 21 is provided which allows the actuating element 18 to rotate and can be expanded by the rotation. Limit switch 2 for stopping the drive motor by
4 and 26 are activated, even if the shutter is stopped by the stopper 23 before it is fully opened or closed during assembly adjustment, the rotation of the threaded rod 16 will prevent the actuator 18 and the threaded rod 16 from interfering with each other. Damage to the threaded portion and separation of the actuator 18 from the threaded portion 18a can be prevented, and assembly and adjustment of the opening/closing device can be easily performed. Furthermore, since the point at which the drive motor stops corresponds to the point at which the actuator 18 is engaged with the stopper 23, the exact locations for installing the limit switches 24, 26 can be easily set.

Next, a second embodiment of this invention will be described based on FIGS. 8 to 10.

In this embodiment, a guide protrusion 41 having a dovetail-shaped cross section is attached to the upper inner surface of the mounting side wall 13, and on the other hand,
As shown in FIG. 9, the housing and holding member 19 has a dovetail groove 42 formed at its upper end to slidably engage with the guide protrusion 41, and the lower surface thereof is open.

Therefore, when the housing and holding member 19 is moved left and right by the actuator 18, it moves without rotational deviation, and the distance between the switch pressing piece 19 and the limit switches 24, 26 is always maintained at a constant distance. Since it is possible to use the same limit switch 24,
26 can be prevented from malfunctioning. Furthermore, since the lower surface of the housing and holding member 19 is opened, the actuator 18 can be rotated and adjusted by hand directly.

In addition to the embodiments described above, this invention can also be implemented in the following manner.

(B) As shown in FIGS. 11A and 11B, more than half of both the left and right side surfaces 19a and 19b of the housing and holding member 19 are cut out to make it easier to rotate the actuator 18 by hand during assembly adjustment. to do.

(b) As shown in Figs. 12A and 12B, the switch pressing piece 21 of the accommodating and holding member 19 may be provided on only one side.

(C) As shown in FIGS. 11 and 12, a guide protrusion 43 is provided protrudingly at the center of the upper end surface of the housing/holding member 19, and a guide protrusion 43 is provided along the upper side of the mounting side wall 13 in the left-right direction. A guide hole (not shown) into which the projecting piece 43 is slidably fitted is provided,
To guide the accommodation holding member 19 along the guide hole.

(d) As shown in FIG. 13, the number of locking protrusions 22 on the switch pressing piece 21 is reduced to one.

As detailed above, in this invention, an actuator having a large number of gear-shaped locking recesses formed on the outer periphery is screwed onto the threaded portion of the screw rod, which rotates at a fixed position in proportion to the rotation of the drive motor. A pair of left and right step portions are formed on the outer periphery of both left and right ends of the threaded rod, and a housing and holding device is provided in the actuator so that it can move in the axial direction of the threaded rod without rotating together with the actuator. Attaching the member, and engaging the locking convex portion protruding from the outwardly deflectable switch pressing piece provided on the other side of the housing/holding member with the locking recess of the actuator,
By providing a limit switch that is opened and closed by the switch pressing piece near the stepped portion, it is possible to finely adjust the actuator when assembling a forward/return end opening/closing device such as a shutter, and also to prevent the actuator from moving. Even if the screw rod rotates abnormally while hitting the stopper, the threaded part of the actuator will not be damaged, and the forward and backward travel end of the shutter, etc. can be easily adjusted and set. This is an excellent idea as a forward/return end opening/closing device.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional shutter opening/closing device, Figs. 2 and 3 are a front view and a side sectional view of a main part of a shutter opening/closing device embodying this invention, and Figs. 4 and 5. The figures are a side view and a front sectional view of the holding member of the shutter opening/closing device, FIG. 6 is a front sectional view of the main part showing the locked state of the stopper and the actuator, and FIG. The electric circuit diagram, FIGS. 8 and 9 are a front view and a side sectional view of the main parts of a second embodiment of the shutter opening/closing device embodying this invention, and FIG. 10 is a perspective view of the housing and holding member. , FIGS. 11A and 11B are a side sectional view and a front view of an accommodation and holding member showing another example of this invention, and FIGS. 12A and B are a side sectional view and a front view of an accommodation and holding member that also shows another example of this invention. Figure, 1st
FIG. 3 is a side view of a housing and holding member showing another example of this invention. Threaded rod 16, threaded portion 16a, driven sprocket wheel 17, actuator 18, housing and holding member 19,
Hole 20, switch pressing piece 21, stopper 23, limit switches 24, 26.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. The threaded portion of the screw rod, which rotates in a fixed position in proportion to the rotation of the drive motor, is equipped with an actuator having a number of gear-shaped locking recesses formed on the outer periphery. together,
A pair of left and right stepped portions are formed on the outer periphery of both left and right ends of the threaded rod, and on the other hand, the actuator is provided with an accommodation and holding member that is movable in the axial direction of the threaded rod without rotating together with the actuator. At the same time, a locking protrusion protruding from a switch pressing piece that can be bent outward provided on the other side of the housing and holding member is engaged with a locking recess of the actuator, and the A reciprocating end opening/closing device characterized by being provided with a limit switch that is opened and closed by a switch pressing piece. 2. The forward and backward end opening/closing device according to claim 1 of the registered utility model, wherein there are two actuators. 3. The limit switch is provided at a position where, when the actuator is locked on the step, the actuator is rotated together with the step and the switch pressing piece is bent outward, thereby pressing the plunger of the limit switch. The forward and backward end opening/closing device according to claim 1 or 2 of the utility model registration claim. 4. The forward and backward movement according to claim 1 or 3 of the utility model registration claim, wherein the stepped portion is a cylindrical stopper that is screwed into both the left and right ends of the threaded rod and fixed to the threaded rod with a screw. End closure device.