JPS5934717Y2 - Geared motor for raising and lowering the shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a geared motor for winding up and rewinding shutters, particularly heavy shutters.

Generally, such a geared motor is equipped with a brake device and can be rotated by manual operation.

If you want to manually rotate this motor to wind up the shutter during a power outage, etc., use an operating handle 4 with a rotating shaft 2 and a handle 3 attached to both ends of an arm 1 as shown in Figure 1. , this operating handle 40 has a rotating shaft 2 that allows you to press a button and release your hand from the handle 3 during winding of the shutter.
A reversal prevention mechanism was provided to prevent an accident in which the shutter would suddenly fall due to its own weight when the shutter was turned.

As this reversal prevention mechanism, as shown in Fig. 1.2, a tightening spring 5 wound in the shape of a right-handed or left-handed coil spring is wound around the base end of the rotating shaft 2 of the operating handle 4.
One end 5a is made free enough to contact the outer periphery of the rotating shaft 2, and the other end is curved into a U-shape to form a hook 5b, and a protrusion 6 that engages with this hook 5b is used as a brake mechanism for the motor. The outer plate of case 7 had an 8VC protrusion.

Such conventional operation... When the handle 4 is rotated in the winding direction of the shutter (in the direction of the arrow P), that is, in the opposite direction to the winding direction of the tightening spring 5, the hook 5b of the tightening spring 5 is rotated. Case I
When it comes into contact with the upper protrusion 6, the rotating shaft 2 of the handle 4 is freely rotated while sliding in the tightening spring 5, and when it is rotated in the opposite direction of the arrow P, that is, in the direction of the tightening spring 50 winding. , the hook 5b of the tightening spring 5 is caught on the protrusion 6VC on the case 7, as shown by the solid line in FIG. As a result, rotation of the rotation shaft 20 was completely prevented.

However, since such a conventional reversal prevention mechanism uses a tightening spring 5 in the form of a coil spring, the manufacturing cost of the operating handle 4 itself is high, and the tightening spring 5 is also expensive.
It was necessary to prepare two types, right-handed and left-handed, to match the rotation direction of the motor.

In addition, since the tightening spring 5 functions by friction between its inner circumference and the outer circumference of the rotary shaft 2, there are problems such as a short life due to wear and a loss of anti-reverse function due to adhesion of oil and fat.

Furthermore, in this reversal prevention mechanism, when the rotating shaft 2 is reversed in the direction of the arrow P, the rotating shaft 2 is rotated approximately once at 1 when the reverse rotation is stopped, and the shutter is shuttered by the amount of rotation. It was very dangerous because the operating handle 25 was rotated by almost one full rotation without turning the rotating shaft 200 times.

The purpose of the present invention is to eliminate the defects existing in the above-mentioned conventional technology,
The manufacturing cost of the operating handle can be reduced without using a tightening spring, and even if the operating handle is reversed by, for example, releasing your hand from the handle during winding of the shutter, the amount of reversal is practically ignored. It is possible to minimize the amount of shutter descent by making it as small as possible.

An object of the present invention is to provide a geared motor for raising and lowering a shutter.

An embodiment embodying the present invention will be described below with reference to FIGS. 3 to 5. Reference numeral 11 is a case similar to the conventional case incorporating a brake device for a geared motor, and the center of the outer plate 12 is provided with the operations described below. An insertion hole 13 that is thicker than the outer diameter of the rotating shaft 27 of the handle 25 is formed through the shaft.

The center of this insertion hole 13 substantially coincides with the axis of the main shaft 14 of the motor.

Reference numeral 15 denotes a holding metal fitting which extends above the insertion hole 13 and is attached to the inner surface of the outer plate 12, and is bent into a front crank shape.

The holding fitting 15 is fixed to the outer plate 12 by screwing a screw 17 from the outside of the outer plate 12 into a nut 16 fixed to the inside of the upper end.

Further, the lower half of the holding fitting 15 serves as a support portion 15a that is spaced inward from the outer plate 12.

A latching piece 18 is formed by cutting out a part of the support portion 15a toward the outer plate 12, and specifically latches and holds the ratchet pawl 19 as shown in FIG.

This ratchet pawl 19 is formed into a substantially mountain shape by a wire-like bar material and has a button, and the above-mentioned latching piece 18 is clamped in an annular portion 20 formed at the upper end of the ratchet pawl 19, and the lower end of the ratchet pawl 19 is tilted downward. It stands out.

Reference numeral 2L22 denotes a row of fixing support parts that are buttoned slightly below the insertion hole 13 of the outer plate 12 and provided in a symmetrical manner, and both of them are located on the same circumference with the insertion hole 13 as the center along with the holding metal fitting 15. They are located approximately 120 degrees apart.

Both fixed support parts 21, 22 are formed by punching and molding a part of the outer plate 12 inwardly into a hook shape.

Reference numeral 23 denotes a ratchet wheel supported inside the outer plate 12 by the above-mentioned fixed support part 2L22 and the support part 15a of the holding fitting 15, and the ratchet wheel 23 on the upper part
3a [Both lower ends of the ratchet pawl 190 can be engaged.

The ratchet wheel 23 is supported so as to be able to move slightly in the radial direction, and is only allowed to rotate in the direction of the arrow Q by the action of the ratchet pawl 19.

Reference numeral 24 denotes a locking hole formed at the center of the ratchet wheel 23, which has a partially closed circular shape.

This locking hole 24 has the same shape as the outer end of the main shaft 14 of the motor, and is formed to be thicker than the outer end.

Further, the center of the locking hole 24 does not necessarily coincide with the center of the insertion hole 13 when it is attached to the case outer plate 12.

Reference numeral 25 denotes an operating handle for manually rotating the main shaft 14 of the motor, and its arm 26 is formed by drawing from a single thin iron plate.

27 is a pipe-shaped rotating shaft welded and fixed to one end of the arm 26, and its outer diameter is set to the ratchet wheel 23.
Like the locking hole 24, it has a circular shape with a portion closed to form a flat surface, and has a thickness such that it can be fitted into the locking hole 24 so as to be integrally rotatable.

Further, the shape of the hole 28 in the rotating shaft 27 is also a partially closed circular shape, so that the main shaft 14 of the moke can be inserted into the hole 28 .

29 is a handle attached to the other end of the arm 26.

When manually rotating the main shaft 14 of the motor for winding the shutter using the operation handle 25 configured as described above, first insert the handle 250 and the rotation shaft 27 through the insertion hole 13 of the case outer plate 12 and ratchet the shaft. It is inserted into the locking hole 24 of the wheel 23, and the main shaft 14 of the motor is inserted into the hole 28 of the rotating shaft 27.

Since the ratchet wheel 23 is supported inside the case outer plate 12 so as to be movable in the radial direction, the handle 25
When inserting the zero rotation shaft 27 into the locking hole 24 of the ratchet wheel 23, move the rotation shaft 27 appropriately within the insertion hole 13 of the case outer plate 12 and find the position of the locking hole 24. good.

...The rotation shaft 27 of the handle 25 is connected to the ratchet wheel 23.
After fitting the handle 25 into the main shaft 14 of the motor or manually releasing the brake, rotate the handle 25 in the direction of the arrow Q.

As a result, the main shaft 14 of the motor is rotated, and at the same time, the ratchet wheel 23 is also rotated in the direction of the arrow Q.

Since the ratchet pawl 19 allows the ratchet wheel 23 to rotate in the direction of the arrow Q, the ratchet wheel 23 is rotated smoothly.

Now, if a person releases the operating handle 25 during winding of the shutter, the main shaft 14 of the motor is reversed due to the weight of the shutter, so that the operating handle 250 is rotated via the rotating shaft 27. The ratchet wheel 23 is about to be rotated in the direction of the anti-Q arrow.

However, since the ratchet pawl 19 is engaged with the ratchet wheel 23, rotation of the ratchet wheel 23 in the direction of the arrow Q is prevented.

Therefore, the shutter is reliably prevented from falling due to its own weight.

Note that at this time, the amount of rotation of the ratchet wheel 23 in the direction of the anti-Q arrow is only the length of one ratchet tooth 23a at most.

If the rotation of the operating handle 25 during winding of the shutter is to be changed in the opposite direction to that described above, the screw 17 can be loosened, the holding fitting 15 can be removed from the case outer plate 12, and the ratchet wheel 23 can be turned over.

This is because if this is done, the direction of the ratchet teeth 23a of the ratchet wheel 23 will be reversed.

Furthermore, since the arm 26 of the operating handle 25 is formed by drawing from a single iron plate, there is an advantage that the manufacturing cost is reduced.

As detailed above, the present invention is an operation system in which a rotation shaft is attached to one end of the arm.The rotation shaft is inserted in correspondence with the outer end of the main shaft of the motor, which can be manually rotated from the outside using a handle. A part of the outer plate of the motor's brake equipment case is provided with an insertion hole through the outer plate, and the same insertion hole is almost cut out so that the rotation shaft of the operation handle is inserted so as to be able to rotate integrally with the insertion hole. A ratchet wheel having a locking hole as shown in FIG. The manufacturing cost of the operating handle can be lowered,
Furthermore, even if the operating handle is reversed during winding of the shutter, the amount of reverse rotation can be reduced to minimize the amount of descent of the shutter due to its own weight, making it an excellent practical device for use as a geared motor for raising and lowering the shutter. .

[Brief explanation of the drawing]

Figure 1 shows the operation and operation of a conventional geared motor for raising and lowering the shutter.
・Perspective view shown with the handle, Figure 2 shows the same operation.
Fig. 3 is an exploded perspective view showing the main shaft of the geared motor embodying the present invention and the outer plate of the brake device case together with the operating handle; 4 is a partially enlarged front view showing the state in which the ratchet wheel is supported by the outer plate of the brake device case, and FIG. 5 is a partially enlarged side view showing the state in which the ratchet pawl is secured to the slip wheel. Case 11, outer plate 12, insertion hole 13, main shaft 14, ratchet pawl 19, ratchet wheel 23, locking hole 24,
Operation handle 25, arm 26, rotation axis 27°

Claims (1)

[Claims for Utility Model Registration] ■ Operation with a rotating shaft attached to one end of the arm...The rotating shaft is inserted in correspondence with the outer end of the main shaft of a motor that can be manually rotated from the outside using a handle. An insertion hole for the motor is provided in a part of the outer plate of the motor brake device case, and the rotation shaft of the operating handle can be inserted into the operation handle so as to be able to rotate integrally with the insertion hole. A shutter characterized in that a ratchet wheel having a locking hole is rotatably held inside the case outer plate, and a ratchet pawl that engages with ratchet teeth of the ratchet wheel is attached to the inner side of the case outer plate. Gear motor for lifting. 2. Utility Model Registration Claims Paragraph 1 states that the rotating shaft has a round pipe shape with a part closed and formed into a flat shape, and the outer end of the main shaft of the motor can be rotated integrally with the rotating shaft inside the pipe. A geared moke for raising and lowering the shutter with a size of 4'4 that can be inserted into the 3 Claims for Utility Model Registration Paragraph 1 states that the ratchet wheel is held in place by a pair of fixing supports and a retainer for holding the ratchet pawl, which are provided at 120 degree intervals on the inside of the outer panel of the case. Features a gear motor for lifting and lowering the shutter. 4. According to paragraph 3 of claims for utility model registration, the holding fitting is removably fixed to the upper inner side of the case outer plate, and the pair of fixing supports are located below the holding fitting and are part of the case outer plate. A gear motor for lifting and lowering a shutter, characterized in that it is formed by inwardly punching and molding. 5. A shutter characterized in that a part of the holding metal fitting is punched out toward the outer side of the case to form a latching piece for attaching a ratchet pawl, in accordance with claim 4 of the utility model registration claim. Gear motor for lifting. 6. A geared motor for raising and lowering a shutter according to claim 5 of the utility model registration, characterized in that the ratchet pawl is formed of a wire-like bar material into a substantially mountain shape. 7 Utility Model Registration Claim Paragraph 1: A geared motor for lifting and lowering a shutter, characterized in that the arm of the handle is formed by drawing a single sheet of steel.