JPH0735716B2 - Electric gate drive - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a drive device for an electric gate.

Conventional technology In general, the gate is usually a manual type that opens and closes manually,
When it is large, the electric type that opens and closes by the driving force of the motor is adopted. The electric gate is used because it has a structure in which the output of the motor is transmitted to the sprocket via a reduction gear, and the rack side door is moved by the meshing of the sprocket and the rack, so that the door can be moved straight forward without fail. To be

In such an electric gate, a motor with a brake is usually used as a motor, but in this case, when the current to the motor is cut off in the event of a power failure or an electrical failure, Since the motor is braked and the speed reducer is interposed between the motor and the motor, the door seems to be locked and cannot be moved at all by human power. In other words, when an electrical trouble such as a power failure occurs,
It had the drawback that the door could not be opened and closed.

OBJECT OF THE INVENTION The object of the present invention is to provide an extremely simple operation even when an electrical trouble such as a power outage occurs by interposing a clutch mechanism between the speed reducer and the sprocket in view of the circumstances of the prior art. Accordingly, it is an object of the present invention to provide a drive device for an electric gate, in which a door driving sprocket is completely released from a brake such as a motor and the door can be freely opened and closed by human power.

The configuration of the present invention for achieving the above object is to form a rack along the moving direction of a door that moves laterally and opens and closes.
In a drive device for an electric gate door, in which a speed reducer is interposed between a sprocket and a motor that mesh with the rack, and the door is opened and closed by the rotation of the reduced sprocket, the output shaft of the speed reducer is integrated. By operating a clutch mechanism by interposing a clutch mechanism between the attached sleeve and the sprocket, the mechanical connection between the sprocket and the speed reducer can be easily cut off, so that the electric power during a power failure can be cut off. The main point is that the door can be easily opened and closed manually even when a physical trouble occurs.

Example Hereinafter, an example will be described with reference to the drawings.

The electric gate drive device includes a torque limiter 9 and a speed reducer R between a motor M and a drive sprocket S for the door D.
And a clutch mechanism C (see FIGS. 1 and 2).
Figure).

The electric gate supports the horizontally long door D on the pillar P via the wheels 6 and the side rollers 6a so as to be movable in the longitudinal direction thereof, and at one side surface of the lower frame 7 of the door D, A rack 8 that meshes with the drive sprocket S from one end to the other end
The rack 8 has a large number of pins 8b, 8b ... Arranged in rows between the upper and lower brackets 8a, 8a.

The reduction gear R is one in which a horizontal shaft input shaft 2 and a vertical shaft output shaft 1 are connected by a reduction gear train (FIG. 2),
The reduction ratio is selected so that the drive speed of the door D becomes a predetermined value.

A sleeve 10 is integrally attached to the output shaft 1 of the vertical shaft. That is, the sleeve 10 is a substantially cylindrical member fitted with the flange 10a that fits into the output shaft 1 as a whole, and the output shaft 1 is provided by the key 1a and the set bolt 1b.
Is integrally fixed to. Further, a hole 10c for inserting the clutch shaft 12 is formed in the center of the upper surface of the sleeve 10, while the spline 10 is formed on the outer periphery of the upper portion of the sleeve 10.
b, 10b ... are engraved (Fig. 5).

A clutch shaft 12 penetrates through a hole 10c of the sleeve 10, and the clutch shaft 12 and a power transmission member 16 that is screwed onto the clutch shaft 12 and can move up and down are connected to the clutch mechanism C between the sleeve 10 and the sprocket S. Are formed (FIG. 2).

The clutch shaft 12 has a flange 12a at the lower end, and the sleeve 1
It is rotatably held by the 0 hole 10c. A male screw 12b is threaded from the vicinity of the central portion of the clutch shaft 12 to the upper side, and a handle 18 is fixed to the upper end of the clutch shaft 12 by a taper pin or a set bolt 18a.

The power transmission member 16 is a cylindrical shape having an upper bottom 16a, and the upper bottom 16a
In the center of the, female screw 1 that engages with the male screw 12b of the clutch shaft 12
With 6b. The lower surface of the power transmission member 16 is provided with upper teeth 16c, 16c, which mesh with the lower teeth 14a, 14a, formed on the upper surface of the boss 14 of the sprocket S (FIG. 6), and its cylindrical inner wall. Are engraved with splines 16d, 16d, which mesh with the splines 10b, 10b, ... of the sleeve 10 (Fig. 5),
The power transmission member 16 is engaged with the sleeve 10 so as to be vertically movable only without rotating (FIG. 2).

The sprocket S is loosely fitted to the outer circumference of the sleeve 10,
The sprocket S is rotatably mounted on the flange-shaped flange 10a, and the sprocket S is formed on the upper surface of the boss 14 so as to mesh with the upper teeth 16c formed on the power transmission member 16 as described above. The teeth 14a, 14a ... Are formed.

In the drive device for the electric gate having such a configuration, the motor M
When the output shaft 1 of the speed reducer R rotates due to the operation of, the sleeve 10 integrated with the output shaft 1 rotates, and the power transmission member 16
, But the splines 10b, 10b, ... Of the sleeve 10 and the splines 16d, 16d ,. The above operation is established regardless of whether the power transmission member 16 moves up and down and the upper teeth 16c, 16c ... Of the power transmission member 16 and the lower teeth 14a, 14a ... Of the sprocket S mesh with each other.

Therefore, the clutch shaft 12 is rotated through the handle 18 to set the upper teeth 16c, 16c ... Of the power transmission member 16 and the sprocket S.
When the power transmission member 16 is moved downward until the lower teeth 14a, 14a ... Are engaged, the rotation of the output shaft 1 of the reduction gear R is transmitted to the sprocket S via the sleeve 10 and the power transmission member 16. Therefore, the clutch mechanism C can be brought into the engaged state (FIG. 2). At this time, since the sprocket S can also be rotated by rotating the motor M, the sprocket S is used in this state during normal times without any electrical trouble.

When the motor M is stopped due to a power failure or other electrical trouble, the braking force of the motor M is increased by the speed reducer R. Therefore, when the clutch mechanism C is engaged, the sprocket S cannot rotate, The door D cannot be opened or closed manually. However, by rotating the handle 18 and raising the power transmission member 16, the upper teeth 16c, 16c ...
.. and the lower teeth 14a, 14a ... Are disengaged and the clutch mechanism C is disengaged (FIG. 3). As a result, the connection between the power transmission member 16 and the sprocket S is broken, so that the sprocket S rotates. Since it becomes free, the door D can be easily opened and closed manually.

Although the rotation of the power transmission member 16 with respect to the sleeve 10 is restricted by the engagement of the splines 10b, 10b ..., 16d, 16d ... Here, instead of this, a simple slide key and a key groove are used. Of course, it is okay.

Other Embodiments The clutch mechanism C can be constructed by using a disc-shaped power transmission member 26 having upper teeth 26c, 26c ... Formed on its lower surface (FIGS. 7 and 10).

At this time, lower teeth 10d, 10d ... meshing with the upper teeth 26c, 26c ... Of the power transmission member 26 are also formed on the upper surface of the sleeve 10, and the upper surfaces of the lower teeth 10d, 10d. It is made higher than the upper surfaces of the lower teeth 14a, 14a ... Formed on the boss 14 of S.

A clutch shaft 22 penetrates through the center of the upper surface of the sleeve 10 and is prevented from rotating by a key 22c, and the clutch shaft 22 is fixed to the sleeve 10 by a flange 22a so that it cannot move up and down.

The power transmission member 26 is loosely fitted to the clutch shaft 22 through a hole 26b provided at the center, and a compression coil spring 30 is provided between the washer 28 fixed to the upper end of the clutch shaft 22 and the power transmission member 26. The power transmission member 26 is always elastically urged downward. However, the method of urging the elastic force is an example, and any other method may be used. I shall. Further, when the hexagon nut 29 is not used, it is not necessary to make the clutch shaft 22 non-rotatable with respect to the sleeve 10, so that the key 22c is not necessarily provided.

In the clutch mechanism C having such a configuration, the power transmission member
The upper teeth 26c, 26c of 26 are the lower teeth 10d, 10d of the sleeve 10,
Further, when the clutch mechanism C is engaged when the lower teeth 14a, 14a, ... Of the sprocket S are meshed with each other, the output shaft 1 of the reduction gear R and the sprocket S are connected to the sleeve 10. Since it rotates integrally with the power transmission member 26, it is used in this state during normal times without electrical trouble (Fig. 7).

When the motor M is stopped due to a power failure or other electrical trouble, the power transmission member 26 is manually pulled up against the compression coil spring 30 and then slightly rotated to rotate the upper teeth 26c, 26c. Is placed on the lower teeth 10d, 10d of the sleeve 10, the upper surfaces of the lower teeth 14a, 14a of the sprocket S are
Since it is lower than the upper surface of the lower teeth 10d, 10d, the upper teeth 26c, 26c ... And the lower teeth 14a, 14a .. do not mesh with each other, and in this state, only the sprocket S can freely rotate. Therefore, the clutch mechanism C is disengaged (FIG. 8), and the door D can be easily opened and closed manually.

The state where the clutch mechanism C is disengaged (Fig. 8)
When the gears are brought into engagement with each other (FIG. 7), first, the power transmission member 26 is manually rotated to engage the upper teeth 26c, 26c ... With the lower teeth 10d, 10d. ). At this time, in most cases, the lower teeth 14a, 14a of the sprocket S are
, Are not in phase with the lower teeth 10d, 10d of the sleeve 10, the upper teeth 26c, 26c of the power transmission member 26 are the lower teeth 14d.
It will ride on the upper surface without meshing with a, 14a .... When the motor M is started in this state, the sleeve 10 integrated with the output shaft 1 of the reduction gear R rotates, meshes with the lower teeth 10d, 10d ... Of the sleeve 10 and passes through the upper teeth 26c, 26c. As a result, the power transmission member 26 also rotates. The power transmission member 26 rotates and its upper teeth 26c, 26c ...
When it reaches the position where it meshes with a, 14a ...
Since it is elastically biased downward by the compression coil spring 30, it descends to the lowest position where it meshes with the lower teeth 14a, 14a of the sprocket S, and the clutch mechanism C is in a completely engaged state. (Fig. 7).

In this embodiment, since the clutch mechanism C can be engaged and disengaged by the vertical movement of the power transmission member 26 and a slight rotation operation, it is possible to provide a clutch mechanism having a simpler operability.

As described above, according to the present invention, since the clutch mechanism is interposed between the speed reducer connected to the motor shaft and the door driving sprocket, when the door is opened and closed electrically. If the power transmission to the sprocket is cut off by the clutch mechanism, only the sprocket can be idle, so that the door can be easily opened and closed manually.

In addition, since the clutch mechanism can be integrally incorporated on the speed reducer, there is an effect that it can be made extremely compact as a whole.

[Brief description of drawings]

1 to 6 show an embodiment, FIG. 1 is a front view of an electric gate, FIG. 2 is a sectional view of an essential part in a state where a clutch mechanism is engaged, and FIG. 3 is a clutch mechanism. FIG. 4 is a sectional view of a main part in a disengaged state, and FIG.
5 is an enlarged cross-sectional view of a portion, FIG. 5 is a cross-sectional view taken along the line XX of FIG.
FIG. 6 is a side view of the main part of FIG. FIGS. 7 to 10 show another embodiment, FIG. 7 is a sectional view of an essential part in a state where the clutch mechanism is engaged, FIG. 8 is a view corresponding to FIG. 3, and FIG. 9 is power transmission. FIG. 10 is a sectional view of an essential part in a state where only the upper teeth of the member and the lower teeth of the sleeve are engaged with each other.
The figure is an exploded perspective view of main parts. C ... Clutch mechanism D ... Gate R ... Reduction gear S ... Sprocket 1 ... Output shaft 8 ... Rack 10 ... Sleeve 10d ... Lower teeth 12, 22 ... Clutch shaft 12b ... Male screw 14 ... Boss 14a ... Lower teeth 16, 26 ... Power transmission Member 16b ... Female thread 16c, 26c ... Upper teeth

Claims (3)

[Claims] 1. A drive unit for an electric gate, wherein a rack is formed along a moving direction of a gate that moves laterally and opens and closes, and a sprocket rotating through a speed reducer is meshed with the rack. The boss of the sprocket is rotatably fitted to the sleeve integrally attached to the output shaft of the machine,
A drive device for an electric gate, wherein a clutch mechanism is interposed between the sleeve and the sprocket. 2. The clutch mechanism is a cylindrical shape having an upper bottom, and a power transmission member that engages with the sleeve in a vertically movable manner, and a clutch that protrudes on the shaft of the sleeve and rotates with respect to the sleeve. And a clutch shaft that is freely rotatable.The power transmission member and the clutch shaft are screwed together by a female screw provided on the upper bottom and a male screw provided on the clutch shaft to rotate the clutch shaft. By operating the power transmission member up and down, the upper teeth formed on the lower surface of the power transmission member and the lower teeth formed on the upper surface of the boss of the sprocket can be disengaged. A drive device for an electric gate according to claim 1. 3. The clutch mechanism loosely fits a disc-shaped power transmission member having upper teeth formed on a lower surface thereof onto a clutch shaft projecting on the shaft of the sleeve, and the upper surface of the sleeve and the sprocket are Lower teeth that mesh with the upper teeth are formed on the upper surface of the boss, and the upper surfaces of the lower teeth of the sleeve are higher than the upper surfaces of the lower teeth of the boss of the sprocket and are elastically attached downward. The drive of the electric gate according to claim 1, wherein engagement of the upper teeth and the lower teeth can be disengaged by vertically moving the urged power transmission member. apparatus.