JPH083336Y2 - Silencer structure of chain drive type curtain opening and closing device - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field to which the Invention belongs This invention is, for example, a curtain such as a shade or a blind, which prompts the rotation of the drive shaft by pulling down the chain hanging from the rail end, The present invention relates to a chain drive type catenary opening / closing device that opens and closes by means of, and more specifically, to a sound deadening structure for a chain drive type curtain opening / closing device that allows quiet opening / closing operations.

(B) Prior Art Conventionally, the structure of the drive unit in the above-mentioned chain drive type curtain opening / closing device is configured by mounting a large number of beads on a single cord at a predetermined equal interval. A loop-shaped chain is wound around a chain wheel whose outer surface has irregularities so that the beads can mesh with each other.The drive shaft inserted in the shaft hole of the chain wheel rotates forward and backward by pulling down the chain. It is configured to do.

Also, the chain wheel is stored in the box,
This box is fixed to the lower surface of the rail end. Therefore, the size of the box described above is formed to be approximately equal to the thickness of the rail and to be compact, and the size of the chain wheel housed in the box is large enough to reach the limit of the inner wall of the box in terms of torque transmission. Has been done.

(C) Problems to be solved by the invention Since the above-mentioned restrictions exist between the conventional chain drive type curtain opening / closing device and the box storing the chain wheel and the chain, the chain is pulled down. Sometimes, the beads on the slack side of the chain jump up and collide with the inner wall of the box, and the sound generated by this collision becomes noise. That is, when pulling down the chain, a load is applied to the pulled down side of the chain wheel, and at this time, on the opposite side of the chain wheel, that is, on the slack side, the beads of the chain to be meshed are directed outward by the teeth of the chain wheel. It is bounced up and hits the inner wall of the box, producing noise.

Therefore, the present invention takes the above-mentioned problems into consideration,
An object of the present invention is to provide a muffler structure for a chain drive type curtain opening / closing device that can reduce noise generated when the curtain is opened / closed and that allows the curtain opening / closing operation to be performed quietly.

(D) Means for Solving the Problem The present invention is a chain in which the entire peripheral surface of the chain wheel meshing with the chain is surrounded by a cushioning member except for the lower peripheral surface of the chain wheel corresponding to the pull-down side of the chain. It is characterized in that it is a sound deadening structure of the drive type curtain opening / closing device.

(E) Action In the sound deadening structure of the chain drive type curtain opening / closing device according to the present invention, one end side of the chain which is wrapped around the chain wheel comes into contact with the cushioning member when the curtain is opened and closed, so that the shock generated at the time of collision is absorbed.

(F) Effect of the device As described above, according to this device, the entire outer peripheral surface of the chain wheel that engages with the chain is surrounded by the cushioning member except for the pull-down side of the chain. The chain is elastically restricted by the cushioning member, and the chain can be surely prevented from falling off and idling. In addition, since the shock generated at the time of collision is absorbed by the cushioning member, it is possible to prevent a loud noise from being generated, and the curtain opening / closing operation can be performed quietly, which is excellent in sound deadening effect.

(G) Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

The drawings show a manual curtain opening / closing device for pulling up and opening a shade used as a substitute for a curtain by pulling down a chain, and a driver used for the device. As shown in FIG. 1, the curtain opening / closing device 1 described above.
Has a structure in which the drive shaft 5 is inserted through the driver 3 fixed to the lower surface of the rail 2 on one end side and the three winding drums 4 fixed to the lower surface side of the rail 2. By pulling down the plastic chain 6 made of synthetic resin hanging in the forward and reverse directions to wind and rewind the elevating cords 7 ... On the winding surface of the winding drums 4 ... The shade 8 suspended on the lower surface side is pulled up and opened and closed.

In the plastic chain 6 described above, for example, a large number of eyebrow beads 9 ... Made of synthetic resin such as plastic are attached to the surface of one cord at regular intervals, and both ends of the cord are connected. By doing so, a loop is formed.

As shown in FIG. 2, the above-mentioned driver 3 has a driver body 11 in which a chain wheel 10 having a plurality of teeth with which the beads 9 of the plastic chain 6 are meshed is rotatably supported.
And a chain wheel that is fitted and fixed to the chain wheel 10 side of the driver body 11 and meshes with the plastic chain 6 described above.
A cushioning member 12 surrounding the entire peripheral surface of 10, and a size and shape that covers the entire outer surface of the cushioning member 12, and is fitted on the chain wheel 10 side of the driver body 11 described above via the cushioning member 12. It is composed of a lid body 13 fixed and fixed.

The above-mentioned driver main body 11 has a mounting portion 14 which is attached to the lower surface side of the rail 2 on the upper end surface of the driver main body 11 formed in a vertically long shape, and the above-mentioned one side surface of the driver main body 11 is described above. The chain wheel 10 is rotatably supported.

The one end of the rotary shaft 15 is inserted through the center of the chain wheel 10, and the guide ring is attached to the tip of the protruding end of the rotary shaft 15.
16 is rotatably fitted.

Further, on the upper side of the chain wheel 10 pivotally supported on one side surface of the driver body 11, arc-shaped guide pieces 17 corresponding to the upper outer peripheral surface of the chain wheel 10 are formed at predetermined intervals, and one side surface thereof is also formed. The two points forming the diagonal line of
13 Screw holes 18, 18 for mounting are formed.

The buffer member 12 is integrally formed of, for example, a synthetic resin such as polyethylene, has a size corresponding to the chain wheel 10 side of the driver body 11 described above, and is slightly larger than the lateral width of the chain wheel 10. In addition to being formed in a wide plate shape, a rotating portion 19 that is slightly larger than the outer peripheral surface of the chain wheel 10 is formed on the outer peripheral portion of the chain wheel 10 that meshes with the beads 9 of the plastic chain 6. The guide piece storage groove 20 in which the guide piece 17 is housed is formed at a position corresponding to the guide piece 17, and the position corresponding to the screw holes 18 and 18 described above is larger than the screw holes 18 and 18. The through holes 21, 21 having a large inner diameter are formed, and the through holes 21, 21 are formed.
The reinforcing pipes 22 and 22 are provided in the.

Further, on the lower side of the above-described rotating portion 19, the inner walls on both sides are inclined inward so that the space has a tapered shape.
3, 23 are formed, the passage width of the plastic chain 6 is formed vertically from the narrow portion to an inner wall portion, and a rectangular opening 24 is formed at the center of the lower end surface. The opening 24 is formed by slightly projecting its edges in all directions, and the driver main body 11 described above is formed.
Also, the edge of the lid 13 is held vertically.

The lid 13 is formed in a size and shape that surrounds the entire outer surface of the cushioning member 12 fitted and fixed to the chain wheel 10 side of the driver body 11, and is formed in the central portion of the outer surface of the lid 13. The guide ring 16 described above is loosely fitted in the shaft hole 25, and the screw insertion holes 26, 26 are formed at the positions corresponding to the screw holes 18, 18 described above, and the screws inserted from the screw insertion holes 26, 26 are inserted. 27, 27 are screwed into the above-mentioned screw holes 18, 18.

In the drive unit 3 configured in this way, as shown in FIG. 3, the plastic chain 6 is inserted into the drive unit main body 11 from below through the opening 24 of the cushioning member 12 toward the rotating unit 19 side. On the chain wheel 10 that is pivotally supported, each beads 9 of the plastic chain 6 ...
Are orbiting to mesh with each other.

FIG. 3 is a diagram showing a state in which the lid 13 is removed, and the operation will be described with reference to this diagram.

In order to rotate the chain wheel 10 described above, when one end side of the plastic chain 6 hanging down below the opening 24 of the cushioning member 12 is pulled down, the beads 9 of the plastic chain 6 on the pulling side mesh with the chain wheel 10. , The chain wheel 10 rotates on the pull-down side of the plastic chain 6. At this time, the cushioning member 12
If there are beads 9 drawn out from the opening 24 of the
There are also 9 beads ... Of these, the beads 9 that are drawn into the opening 24 are drawn along the inclined surfaces 23 and 23 that are formed continuously from the opening 24, and the beads 9 will just mesh with the teeth of the chain wheel 10. At that moment, the bead 9 tries to bounce upward with great force.

However, except for the pull-down side of the plastic chain 6, the beads 9 attached to the other end of the plastic chain 6 come into contact with the cushioning member 12 that surrounds the entire circumferential surface of the chain wheel 10, and the vibrations at the time of the collision occur. Resiliently absorbs and absorbs shock. Therefore, the rattling sound of resin collisions is reduced,
It is possible to gently open and close the shade 8 used as a substitute for the curtain, and it is possible to absorb shaking and vibration generated at both ends of the plastic chain 6.

Further, the slanted surfaces 23, 23 formed continuously with the opening 24 of the cushioning member 12 guide the pull-out and pull-in of the plastic chain 6, so that the opposing portion of the plastic chain 6 circling the chain wheel 10 can be squeezed, It is not necessary to assemble a roller or the like to facilitate the pulling-down operation of 6, and the assembling work of the drive unit 3 is easy.

Furthermore, the chain wheel 10 that meshes with the plastic chain 6
Since the entire peripheral surface of the plastic chain 6 is surrounded by the cushioning member 12, the beads 9 of the plastic chain 6 that are about to fall off the chain wheel 10 are regulated by the cushioning member 12,
It is possible to surely prevent the falling and the idling. Further, compared with the case where the hard guide piece 17 covers, the cushioning member 12 absorbs the shock generated when the plastic chain 6 is pulled down well, and reduces the generation of noise, so that it is excellent in the sound deadening effect.

 The invention is not limited to the above-mentioned configuration.

For example, a chain wheel 10 that goes around the plastic chain 6
The outer peripheral surfaces of both side portions may be surrounded by the cushioning member 12.

[Brief description of drawings]

1 is a perspective view showing a curtain opening / closing device, FIG. 2 is an exploded perspective view showing a driver, and FIG. 3 is a side view showing a pull-down operation of a plastic chain. . 1 ... Curtain opening / closing device, 3 ... Driver 6 ... Plastic chain, 8 ... Shade 10 ... Chain wheel, 12 ... Buffer member

Claims (1)

[Scope of utility model registration request] 1. A chain drive type curtain opening and closing device for opening and closing a curtain by manually pulling down a loop-shaped chain to rotate the chain wheel and rotating the drive shaft inserted through the center of the chain wheel in the forward and reverse directions. A silencer structure for a chain drive type curtain opening / closing device, in which the entire peripheral surface of the chain wheel meshing with the chain is surrounded by a cushioning member except for the lower peripheral surface of the chain wheel corresponding to the pulling side of the chain.