JPH0253594B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Object of the Invention (Field of Industrial Application) The present invention relates to a closer for automatically closing a manually opened sliding door.

(Prior art and problems to be solved) This type of sliding door closer is known as
There are some proposals that have been made in the past, as seen in Japanese Patent Publications No.-9284 and Japanese Patent Publication No. 38-1330.

However, this kind of thing requires a large number of gears,
They have no choice but to have a complicated structure that combines ratchet mechanisms, etc., and the spring means used in these devices to give movement energy to the door during the return movement can sometimes be rolled up. However, the means to solve such problems are usually complicated and cause a lot of wear and tear, and there are concerns about long-term use, and they are extremely disadvantageous in terms of cost. The reality was that there was no such thing.

The present invention has been made in view of the current situation, and has a simple structure, can be easily miniaturized, can prevent a decrease in durability due to miniaturization as much as possible, and has the above-mentioned features. It is an object of the present invention to provide a sliding door closer that can be used stably over a long period of time by reliably preventing excessive winding of a spring, which is an energy source, with a simple structure.

(2) Structure of the invention (technical means for solving the problem, its operation) In order to achieve the above object, the present invention provides a closer for a sliding door, which is arranged at an appropriate position of the sliding door,
A case 1 that pivotally supports a door wheel 3 having a gear 3a arranged on the side thereof, and a gear 5 that meshes with the gear 3a.
a, and a gear 5b having a smaller diameter than the gear 5a and disposed concentrically with the gear 5a, and a drive gear 7 is provided around a dish-shaped member that houses a spring 10 that is biased when the door is opened; a small gear 6 that meshes with the gear 5a only when driven by the gear 5a to transmit rotation to the drive gear 7; and a small gear 6 that meshes with the drive gear 7 only when driven by the drive gear 7; , a medium-sized gear 8 that transmits rotation to the gear 5b, and a recess 12 is formed in the inner surface of the dish-shaped member in which the spring 10 is installed, and one end of the spring 10 installed inside is formed in the recess. 11 are detachably engaged with each other.

With this configuration, we have created a sliding door that has a small number of parts, does not use complicated mechanisms, has a simple configuration, reliably prevents damage to the internal springs, and can be used stably at all times. You can get a closer.

(Description of Embodiments) FIG. 1 is a perspective view of a closer according to the present invention, with a part of the case cut out. It is assumed that the door roller 3 is stored inside and runs on the rail 2.

The door wheel 3 has a gear 3 integrally attached to its side.
A is provided, and this gear 3a meshes with a gear 5a fixed to a shaft 13 attached to the case.

The gear 5a meshes with a small gear 6 provided on the shaft 6a, and the small gear 6 meshes with a drive gear 7.

Further, the gear 5b fixed to the shaft 13 is connected to the shaft 8a.
The medium-sized gear 8 is in mesh with the drive gear 7 .

The shaft 6a supporting the small gear 6 is loosely fitted into a long hole 1a formed in the case, and the shaft 8a supporting the medium gear 8 is loosely fitted into a long hole 1b formed in the case.
It is loosely fitted.

Furthermore, the long holes 1a and 1b are particularly
As can be seen from Fig. 4, in the case of the illustrated device,
The former elongated hole is arranged so that the upper part in the figure is tilted to the right, and
The latter elongated holes are each formed so that the upper side in the drawing is inclined to the left.

The driving gear 7 is formed on the outer periphery of a peripheral rising portion of a member formed as a dish-shaped housing rotatably attached to the shaft 9,
A spring 10 is housed inside the spring 10, one end of which is fixed to the shaft 9, and a bent portion 11 of the other end engaged with a recess 12 formed on the inner surface of the peripheral rising portion.

Next, the operation will be explained.

FIG. 2 shows the position of each part when the sliding door is closed. When the door is moved from this position to open and the door wheel 3 rotates in the direction of the arrow shown in the figure, the gear 5a, small gear 6, The drive gears 7 also rotate in the directions of the arrows in the figure, and along with this,
Spring 10 is wound up.

In this case, the small gear 6 is engaged with the elongated hole 1a, but as shown in FIG.
Since point a is located at the lower end of the elongated hole 1a, rotation is smoothly transmitted from the small gear 6 to the drive gear 7.

On the other hand, at this time, the medium-sized gear 8 is meshed with the gear 5b rotating together with the gear 5a, and the elongated hole 1b that pivotally supports the medium-sized gear 8 is, as described above,
Since it is inclined in the direction shown in Figure 4, the gear 5b
Due to the force received from the medium gear 8, the gear 5b
A force is applied to move the medium-sized gear 8 away from the gear 5b, and the medium-sized gear 8 moves along the elongated hole 1b, automatically separates from the gear 5b, and idles while meshing with the drive gear 7.

As mentioned above, the spring 10 is wound up as the door moves, but if it is wound too much for some reason or the spring is stopped without being rolled in smoothly, the spring 10 will be rolled up further as the door moves. When force is applied from the recess 12
Since the bent portion 11 at the end of the spring separates from the spring and idles, no excessive force is applied to the spring.
It is always energized below a certain level of force to prevent damage.

Under the above conditions, the opened door is
After that, if you leave it alone, due to the restoring force of the spring 10,
Rotation is transmitted in the order of the drive gear 7, the medium gear 8, the gear 5b, the shaft 13, the gear 5a, and the gear 3a, and the door wheel 3
rotates to move a door (not shown) to a closed position.

In this case, the small gear 6 that meshes with the drive gear 7 is separated from the drive gear 7 due to the directionality of the elongated hole 1a, and idles while meshing with the gear 5a.

With this configuration, the device of the present invention can:
Because it can be formed with only a gear train consisting of a spring and a few gears, it is easy to downsize and manufacture.The spring part does not have ratchets or other parts that inevitably cause a lot of wear during operation. This ensures stable and reliable operation at all times by reliably preventing situations that could damage the device.

(3) Effects of the invention As explained above, according to the present invention, a closer that automatically closes a sliding door has a simple structure and a small number of parts, and does not require a particularly complicated mechanism. This effectively prevents damage to the spring that stores the energy for the double motion, resulting in stable operation over a long period of time.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a closer showing an embodiment of the present invention, with the case cut away; Fig. 2 is a side view showing the same before operation; and Fig. 3 is a side view of the same when the door is open. FIG. 4 is a side view of the same when the upper door is closed. 1...Case, 1a, 1b...Elongated hole, 2...Rail, 3...Door wheel, 3a...Gear, 5a, 5b...
...Gear, 6...Small gear, 7...Drive gear, 8...
...Medium gear, 10...spring.

Claims (1)

[Scope of Claims] 1. A case 1 which is disposed at a suitable position of a sliding door and pivotally supports a door wheel 3 having a gear 3a disposed on its side inside thereof; a gear 5a meshing with the gear 3a; and the gear 5.
A drive gear 7 is provided around a dish-shaped member having a smaller diameter than a and a gear 5b disposed concentrically with the gear 5b, and housing a spring 10 which is biased when the door is opened. a small gear 6 that meshes with this only when driven by the drive gear 7 and transmits rotation to the drive gear 7; and a small gear 6 that meshes with this only when driven by the drive gear 7 and transmits rotation to the gear 5b. A recess 12 is formed in the inner surface of the dish-shaped member, which is provided with a medium-sized gear 8 for transmitting rotation, and in which the spring 10 is installed, and one end 11 of the internal spring 10 is detachably attached to the recess. A sliding door closer that is engaged.