JPH0694754B2 - Electric drive for sliding doors - Google Patents

Description

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

Conventional technology In general, the gate is usually a manual type that opens and closes manually,
When it is large, an electric type that opens and closes with a motor is adopted. As an electrically operated gate, there is known one in which the output of a motor is transmitted to a sprocket through a speed reducer and the sprocket is meshed with a rack on the door side to move the door in a straight line (for example, the actual open door). 49-28848).

In such an electric gate, when the door is stopped, the impact force due to inertia or the like extends to the power transmission mechanism including the speed reducer,
This impact force repeatedly causes fatigue of the material and often causes breakage of the reduction gear.

Furthermore, the motor usually uses a motor with a brake, but in this case, when the power to the motor is cut off due to a power failure, the motor is automatically braked, the door is locked, and depending on human power, It stops working at all. That is, there is also a drawback that the door cannot be opened and closed when an electrical trouble such as a power failure occurs.

Further, if a clutch mechanism or a sliding mechanism is incorporated in the drive system in order to solve these drawbacks, an extra bearing or the like is required, and there is a problem that the whole becomes significantly large and complicated. .

OBJECTS OF THE INVENTION Therefore, in view of the circumstances of the prior art, an object of the present invention is to integrally assemble the whole including a clutch mechanism and a sliding mechanism on a speed reducer, thereby eliminating the need for an extra bearing at all, and extremely An object of the present invention is to provide an electric drive device for a sliding door that can be made compact.

The structure of the present invention to achieve the above object is to rotatably fit the inner sleeve fixed to the upward output shaft of the speed reducer and the outer side of the inner sleeve, and through the friction plate by the inner sleeve. An outer sleeve that is driven to rotate, a sprocket that is rotatably fitted to the outside of the outer sleeve and that meshes with the rack on the door side, a clutch shaft that is inserted into the inner sleeve so that it cannot move up and down, and a , A clutch cylinder that rotates integrally with the outer sleeve, and the clutch cylinder is disengageable with respect to the sprocket by moving up and down via the clutch shaft, and the inner sleeve faces the friction plate. The gist is to attach a spring that adjustably presses the outer sleeve.

Action According to the configuration of the invention, the rotation of the inner sleeve is
The rotation of the outer sleeve can be transmitted to the outer sleeve via the friction plate, and the rotation of the outer sleeve can be transmitted to the sprocket via the clutch tube. Therefore, by engaging the sprocket with the rack on the door side, the door can be opened and closed left and right. Also,
The friction plate forms a sliding mechanism interposed between the inner sleeve and the outer sleeve, and the clutch cylinder forms a clutch mechanism interposed between the outer sleeve and the sprocket.

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

The electric drive device of the sliding door type gate includes a speed reducer R and a sliding mechanism B between a motor M and a sprocket S that drives the door D.
And a clutch mechanism C (see FIGS. 1 and 2).
Figure).

The door D is supported by a pillar P so as to be movable in the longitudinal direction via wheels 6 and side rollers 6a. Lower frame 7 of door D
On one side, from one end to the other, the sprocket S
A rack 8 that meshes with the rack 8 is additionally provided. The rack 8 is formed by arranging a large number of pins 8b, 8b ... Between the upper and lower brackets 8a, 8a.

The speed reducer R has an input shaft 2 connected to the motor M, which is projected to one side surface, and an output shaft 1 which is projected upward at a central portion of an upper surface. The input shaft 2 is connected to the motor M via a torque limiter 9, while the slip mechanism B and the clutch mechanism C are integrally assembled on the reduction gear R via the output shaft 1 to form a tower shape. The mechanical part T is formed. The sprocket S is horizontally attached to the lower part of the mechanical section T.

The mechanical part T is an inner sleeve 10 that is fixed to the upward output shaft 1.
On the other hand, in addition to the friction plate 11, the outer sleeve 12, the clutch cylinder 13, the sprocket S, the clutch shaft with the spring 20 and the handle 22
21 assembled together.

The inner sleeve 10 has a step portion 10a facing downward at the lower portion of the inner peripheral surface, and a step portion 10b facing upward is formed at an intermediate portion of the outer peripheral surface. A male screw 10c is formed on the outer periphery of the upper end portion, and a collar-shaped hub 10d is formed on the lower end portion. Inner sleeve 1
In the case of 0, the output shaft 1 is inserted from the lower side, fixed by the key 1a and the lock bolt 1b, and rotated together with the output shaft 1.

The friction plate 11 is formed in a ring shape and is a hub of the inner sleeve 10.
It is attached to the top surface of 10d.

The outer sleeve 12 is rotatably fitted to the outer side of the inner sleeve 10 via a slide bearing 22. Outer sleeve 12
Has an upward step 12a formed on the outer peripheral surface near the upper end (Fig. 7), and further has external teeth 12b, 12b ... Engraved on the outer peripheral surface of the upper end (Figs. 5, 7). . Further, a hub 12c having the same diameter as the hub 10d of the inner sleeve 10 is formed at the lower end of the outer sleeve 12 (FIG. 2), and the hub 12c overlaps the upper surface of the hub 10d via the friction plate 11. The upper end of the outer sleeve 12 projects upward beyond the step 10b on the outer periphery of the inner sleeve 10, and the upper end surface thereof is pressed downward by the spring 20 via the ring-shaped plate 20c.

The spring 20 is attached to the upper part of the inner sleeve 10. That is, the adjusting nut 20a is screwed into the male screw 10c of the inner sleeve 10, and the spring 20 is composed of upper and lower ring-shaped plates.
It is interposed between the adjusting nut 20a and the upper end surface of the outer sleeve 12 via 20b and 20c.

The boss 25 of the sprocket S is rotatably fitted to the outside of the outer sleeve 12, and the lower surface of the boss 25 is in contact with the upper surface of the hub 12c. Lower teeth 26 are formed on the upper surface of the boss 25 (FIGS. 3 and 4).

The clutch cylinder 13 is formed in a cylindrical reverse case shape so as to cover the upper portion of the inner sleeve 10, the spring 20 and the like, and an internal thread 13a is formed at the center of the upper end surface (first). (Fig. 2). Further, on the inner peripheral surface of the lower end portion, the inner teeth 13b, 1 which are constantly engaged with the outer teeth 12b, 12b ... Of the outer sleeve 12 so as to be vertically movable.
3b are formed (FIGS. 5 and 8), and upper teeth 13c which mesh with the lower teeth 26 of the sprocket S are formed on the lower end surface (FIG. 3). The lower teeth 26 and the upper teeth 13c are the same as the clutch tube 1
It is disengaged by moving 3 upward (FIG. 6), and the clutch cylinder 13 can be moved up and down by rotating the clutch shaft 21 left and right via the handle 22.

The clutch shaft 21 is inserted into the inner sleeve 10 so as not to move vertically (Fig. 2). The clutch shaft 21 has an annular protrusion 21.
The annular projection 21c has c at the lower end, and is engaged with the step 10a on the inner peripheral surface of the inner sleeve 10 from below. Clutch shaft 2
1 has an upward step 21a formed near the upper end, and an external thread 21b is formed on the upper part of the step 21a. The external thread 21b is screwed into the internal thread 13a of the clutch cylinder 13. A handle 22 is fixed to the upper end of the clutch shaft 21.

The clutch cylinder 13 includes a step portion 21a of the clutch shaft 21 and a handle 22.
The vertical movement stroke is regulated by and, and a gap 28 is formed between the stroke and the upper surface of the boss 25 of the sprocket S at the lowermost limit thereof (FIG. 4). Therefore, the force with which the outer sleeve 12 presses the friction plate 11 via the spring 20 is determined only by the repulsive force of the spring 20, regardless of the position of the clutch cylinder 13, and this pressing force is
Adjustable by 20a.

In such an electric drive device for a sliding door, when the output shaft 1 of the speed reducer R rotates due to the operation of the motor M, the inner sleeve 10 integrated with the output shaft 1 rotates, and the outer sleeve 12 via the friction plate 11.
Is driven to rotate by the inner sleeve 10 (Fig. 2). On the other hand, the outer sleeve 12 has outer teeth 12b, 12b ... And inner teeth 13b, 13b.
, The clutch cylinder 13 is always engaged, and the spring 20 and the clutch shaft 21 are attached to the inner sleeve 10. Therefore, at this time, the clutch cylinder 13, the spring 20, and the clutch shaft 21 are connected.
Etc. rotate together.

The sliding mechanism B by the friction plate 11 works for power transmission between the inner sleeve 10 and the outer sleeve 12, and the maximum transmission torque can be adjusted by the adjusting nut 20a. That is, if the adjusting nut 20a is screwed downward and the spring 20 is compressed, the spring 20 presses the hub 12c of the outer sleeve 12 strongly against the hub 10d of the inner sleeve 10 via the friction plate 11, and as a result, the transmission is transmitted. The torque increases, and conversely, when the adjusting nut 20a is screwed upward, the transmission torque decreases.

Therefore, when the door D is opened and closed by the motor M, the mechanism portion T rotates as a whole, and the sprocket S rotates integrally with it. In this case, power is transmitted from the outer sleeve 12 to the sprocket S by the upper teeth 13c of the clutch cylinder 13.
And a clutch mechanism C formed by the lower teeth 26 of the sprocket S
by. That is, by operating the handle 22, the clutch cylinder
When the clutch shaft 21 screwed with the female screw 13a of 13 is rotated left and right, the clutch cylinder 13 can be moved up and down.
By lowering the clutch cylinder 13 and engaging the upper teeth 13c of the lower end of the clutch cylinder 13 with the lower teeth 26 of the sprocket S, the clutch mechanism C is connected, and power is transmitted from the outer sleeve 12 to the sprocket S via the clutch cylinder 13. Is transmitted (second
(Fig. 4, Fig. 4). On the contrary, when the clutch cylinder 13 is raised by operating the handle 22 (FIG. 6), the upper teeth 13c and the lower teeth 26 are disengaged and the power transmission path from the outer sleeve 12 to the sprocket S is cut off. .

During normal times when there is no electrical trouble, the clutch cylinder 13 is lowered, that is, the clutch mechanism C is engaged (FIG. 2). At this time, when the output shaft 1 of the speed reducer R is rotated by the operation of the motor M, the entire mechanical section T is integrally rotated, and the door D can be arbitrarily opened and closed by driving the sprocket S.

When the opening / closing operation of the door D is completed, the door D collides with a stopper (not shown) and stops. At the same time, the power supply to the motor M is cut off by a control circuit (not shown). At this time, even if there is a time mismatch between the stop of the door D and that of the motor M, the sliding mechanism B does not move the inner sleeve. Since relative rotation can be permitted between the outer sleeve 10 and the outer sleeve 12, the power transmission mechanism including the speed reducer R has an adjusting nut 20a.
There is no danger of applying an excessive force that exceeds the maximum transmission torque determined by the adjustment of. The same applies when the door D is stopped at an intermediate opening, and even if the motor M is a motor with a brake and the time required for the stop is extremely short, the impact force due to the inertia of the door D causes the sliding mechanism to move. B can effectively absorb and relax the absorption. The torque limiter 9 between the motor M and the speed reducer R is provided as a backup of the sliding mechanism B, and the maximum transmission torque thereof is that of the sliding mechanism B in consideration of the speed reduction ratio of the speed reducer R. It is better to set a little larger.

When the motor M is stopped due to an electrical trouble such as a power failure, the braking force of the motor M is increased by the speed reducer R. Therefore, when the clutch mechanism C is included, the sprocket S is inserted.
Becomes unrotatable and the door D cannot be opened and closed manually (state of FIG. 2). However, if the clutch cylinder 13 is raised by rotating the handle 22 and the clutch mechanism C is disconnected (state of FIG. 6), the clutch cylinder 13 and the sprocket S
Since the engagement with and is disengaged and the sprocket S is free to rotate, the door D can be easily opened and closed manually.

It should be noted that the clutch cylinder 13 has inner teeth 13b with respect to the outer sleeve 12.
By engaging with the outer teeth 12b, they are vertically movably connected, but the inner teeth 13b and the outer teeth 12b may be replaced with a general spline structure or a combination of a simple key and a key groove. Of course good things.

As described above, according to the present invention, the inner sleeve fixed to the upward output shaft of the reduction gear is different from the outer sleeve,
By integrally assembling a series of members including a sprocket, a clutch shaft, and a clutch cylinder, it is possible to construct an extremely compact whole structure including a clutch mechanism and a sliding mechanism on a reducer without requiring any extra bearings. It has an excellent effect that it can be done.

In addition, since the sprocket can be placed at substantially the same position as when it is directly attached to the output shaft of the reducer facing upward, the total thickness of the door including the rack can be minimized. In addition, since there is no lubrication part such as a bearing, there is an excellent practical effect that it can be operated for a long time without maintenance and there is no possibility of oil leakage.

[Brief description of drawings]

1 to 8 show an embodiment, FIG. 1 is a front view of a sliding door type gate, FIG. 2 is an explanatory view of the entire structure, FIG. 3 is a side view of the main part of FIG. 2, and FIG. 5 is an enlarged sectional view of part A of FIG.
FIG. 6 is a sectional view taken along the line XX of FIG. 4, FIG. 6 is an operation explanatory view, FIG. 7 is a partial sectional view of the outer sleeve, and FIG. 8 is a partial sectional view of the clutch cylinder. R ... Reduction gear S ... Sprocket 1 ... Output shaft, 8 ... Rack 10 ... Inner sleeve, 11 ... Friction plate 12 ... Outer sleeve, 13 ... Clutch cylinder 20 ... Spring, 21 ... Clutch shaft

Claims (1)

[Claims] 1. An inner sleeve fixed to an upward output shaft of a speed reducer, an outer sleeve rotatably fitted to the outer side of the inner sleeve, and rotationally driven by a friction plate by the inner sleeve, and the outer sleeve. A sprocket that is rotatably fitted to the outside of the sleeve and meshes with a rack on the door side, a clutch shaft that is inserted into the inner sleeve so that it cannot move up and down, and is arranged above the inner sleeve and is integrated with the outer sleeve. And a clutch cylinder that rotates in a vertical direction. The clutch cylinder is disengageable with respect to the sprocket by moving up and down via the clutch shaft, and the inner sleeve faces the friction plate. An electric drive device for a sliding door type gate, characterized by further comprising a spring for pressing the outer sleeve in an adjustable manner.