JPS6128894Y2 - - Google Patents

Description

[Detailed Description of the Invention] In the present invention, a shaft 1 is rotatably and slidably mounted on a pair of bearings 2 which are arranged to face each other with a gap between them, and the shaft 1 is surrounded on the outer periphery of the shaft 1. The barrel 3 arranged as shown in FIG. 4 is fixed to the shaft 1, a locking projection 6 is provided on the shaft end of the shaft 1 protruding in a direction perpendicular to the shaft 1, and the locking projection 6 is secured to the outer surface of the bearing 2 on the side where the locking projection 6 is located. A plurality of locking grooves 5 in which the projections 6 can lock are provided, and a pressure spring 7 is installed between the shaft 1 and the bearing 2 to urge the locking projections 6 to lock in the locking grooves 5. This device relates to a torque adjustment device for a mainspring spring device, and its purpose is simply to press the shaft against the pressure spring and rotate the shaft to appropriately lock the locking protrusion in the locking groove. To provide a torque adjustment device for a mainspring spring device which can easily adjust the torque of a mainspring spring.

In the case of the conventional mainspring spring device, Fig. 5,
As shown in FIG. 6, the shaft 1 is rotatably inserted into the bearing 2 attached to the mounting frame 8, the barrel 3 is rotatably attached to the bearing 2, and a cable 9 such as a steel tape is attached to the outer periphery of the barrel 3. One end of a mainspring spring 4 which is wound and housed inside the barrel 3 is fixed to the barrel 1, and the other end is fixed to the shaft 1, a driver groove 10 is provided at one end of the shaft 1, and a set screw 11 stops the rotation of the shaft 1. was screwed between the shaft 1 and the bearing 2. However, in such a conventional example, when adjusting the torque of the mainspring spring 4, the set screw 11 was removed and the screw was screwed in the direction B or B' with a screwdriver, etc. Rotate the shaft 1 and tighten the set screw 11 after adjustment.
Since it was held in place, it was difficult to make adjustments, and when the set screw 11 was removed, the mainspring spring 4 would return to its original position, which was inconvenient.

The present invention has been made in view of the above points, and the present invention will be explained in detail below with reference to examples. Almost an inverted U
Bearings 2 are disposed on both sides of the letter-shaped mounting frame 8 so as to face each other, and a shaft 1 is inserted into the bearings 2 so as to be rotatable and slidable. A barrel 3 located on the outer periphery of the shaft 1 is rotatably attached to the bearing 2. One end of a mainspring spring 4 housed inside the barrel 3 is fixed to the barrel 3, and the other end of the mainspring spring 4 is fixed to the shaft 1. It has been done. A cable 9 such as steel tape is wound around the outer periphery of this barrel 3. A flange 12 is provided around one end of the shaft 1, and a driver groove 10 is bored in the top surface of the flange 12. A pair of locking protrusions 6 are provided on the other end of the shaft 1 by inserting a pin therethrough, and two pairs of locking grooves 5 are provided on the outer surface of the bearing 2 in which the locking protrusions 6 can be engaged. is perforated in the shape of a cross. Furthermore, a pressure spring 7 is interposed between the flange 12 and the bearing 1 to urge the shaft 1 so that the locking protrusion 6 is locked in the locking groove 5.

The mainspring spring device configured as described above is used, for example, in an automatic door closing device, and
The cable 9 is connected to a wire or the like that moves with the door to the door itself. However, when the door is opened, the cable 9 is pulled and the barrel 3 rotates, causing the mainspring spring 4 to rotate.
is wound tightly inside the barrel 3, and when the door is released, the barrel 3 rotates in the opposite direction by the force of the mainspring spring 4, and the cable 9 returns, closing the door. In addition, to adjust the torque of the mainspring spring device, as shown in FIG. Rotate the shaft 1 in the direction A or A' to fit the appropriate locking groove 5.
The locking protrusion 6 is locked.

As described above, the present invention includes a locking protrusion protruding from the shaft end of a shaft that is rotatable and slidable relative to the bearing in a direction perpendicular to the shaft, and a locking groove in which the locking protrusion can be locked on the outer surface of the bearing. A pressure spring is installed between the shaft and the bearing to force the locking protrusion to lock in the locking groove, so the shaft is pushed against the pressure spring to rotate the shaft. The torque of the mainspring spring can be adjusted by appropriately locking the locking protrusion in the locking groove, and the torque can be adjusted more easily than the conventional method, which involves attaching and detaching the set screw. There is no risk of the mainspring spring returning as it would when the screw was removed.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is a perspective view of the same as seen from the front side, Fig. 3 is a perspective view of the same as seen from the back side, and Fig. 4 is a view of adjusting the torque of the same as above. Fig. 5 is a sectional view of the conventional example, Fig. 6 is a perspective view of the case.
The figure is a perspective view of a conventional example, in which 1 is a shaft, 2 is a bearing, 3 is a barrel, 4 is a mainspring spring, 5 is a locking groove, 6 is a locking protrusion, and 7 is a pressure spring.

Claims (1)

[Scope of utility model registration request] A shaft is rotatably and slidably mounted on a pair of bearings arranged to face each other at a distance, and a barrel arranged around the shaft so as to surround the shaft is rotatably mounted on the pair of bearings. One end of a mainspring, which is housed inside the barrel so as to be wound around the outer periphery of the shaft, is fixed to the barrel, and the other end of the mainspring spring is fixed to the shaft, and the mainspring is attached to the shaft end of the shaft in a direction perpendicular to the shaft. A locking protrusion is provided protrudingly, and a plurality of locking grooves in which the locking protrusion can be locked are provided on the outer surface of the bearing on the side where the locking protrusion is located,
A torque adjustment device for a mainspring spring device, which includes a pressure spring installed between a shaft and a bearing to urge a locking protrusion to lock in a locking groove.