JPH0753577Y2 - Curtain opening / closing belt tension adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Use The present invention relates to a tension control device for a curtain opening / closing belt that adjusts the tension of a curtain opening / closing belt stretched around a curtain rail, for example.

(B) Conventional Technique As a conventional tension adjusting device for the curtain opening / closing belt, there is, for example, a tension adjusting device already developed by the present applicant (see Japanese Utility Model Publication No. 56-37673).

In this tension adjusting device, pulleys are axially supported at both ends of the curtain rail, and the curtain opening / closing belt is stretched around each of these pulleys in a loop shape. There is a tension adjusting device for rotating one of the pulleys in a direction of tensioning the curtain opening / closing belt by rotating the pulley.

(C) Problems to be solved by the invention However, when the above-mentioned curtain rail is erected inside the window frame such as a bay window, the curtain rail having a long dimension corresponding to the lateral dimension inside the window frame is erected. The both ends of the window frame and both side surfaces of the window frame are close to each other and the gap between them becomes narrow, and the adjustment bolt cannot be rotated by a driver. In this case, the adjustment bolt is rotated by a wrench. Since the wrench is rotated in the circumferential direction around the core, the window frame and curtain rail become an obstacle when rotating the wrench, and must be rotated many times within a narrow rotation allowable range. In addition, since the turning operation is performed while maintaining an unreasonable posture, there is a problem that workability is extremely poor.

In addition, the tension of the curtain opening / closing belt is used to rotate and fix the adjustment bolt, but the tension of the curtain opening / closing belt fluctuates due to the swinging that occurs when the curtain is opened and closed, and at this time, the adjustment bolt gradually loosens. There is also a problem in that the tension of the curtain opening / closing belt becomes lower than that at the time of adjustment by rotating in the direction.

In view of the above problems, the present invention makes it possible to easily adjust the tension of the curtain opening / closing belt by rotating the operating portion provided on the lower surface side of the curtain rail, and to maintain the tension within an allowable range for a long time. It is an object of the present invention to provide a tension adjusting device for a curtain opening / closing belt that can be used.

(D) Means for Solving the Problem This invention is to pivotally support an adjusting bolt for adjusting the tension of the curtain opening / closing belt to the end of the curtain rail so as to be pivotally operable, and to lower the bottom surface of the end of the curtain rail. To
Adjusting the tension of the curtain opening / closing belt in which the operation unit, which is rotated by another jig such as a bolt or a wrench, is rotatably supported and the operation unit and the end of the adjustment bolt are connected by a power transmission mechanism. It is a device.

(E) Action In this invention, the turning force of the operating portion is transmitted to the adjusting bolt via the power transmission mechanism by rotating the operating portion provided on the lower surface of the curtain rail with a screwdriver or a wrench. The rotation of the bolt moves the pulley in a direction to tension the curtain opening / closing belt, and the curtain opening / closing belt stretched around the curtain rail is adjusted to a predetermined tension.

In addition, since the adjustment bolt is connected to the operation unit via the power transmission mechanism, even if the tension of the curtain opening / closing belt changes when the curtain is opened and closed, the adjustment bolt rotates due to the change of the tension. Requires enormous power.

(F) Effect of the Invention According to this invention, since the operating portion for adjusting the tension of the curtain opening / closing belt is provided on the lower surface of the curtain rail, the rotation allowance range of the operating portion is widened, and the curtain opening / closing belt is increased. It is possible to continuously rotate the operating part until the tension becomes a predetermined tension, eliminating the need to replace the rotation operation tool many times as in the conventional device, and adjusting the tension of the curtain opening / closing belt. The work time can be shortened and the workability can be improved. Further, since the pivotal support of the operation portion is provided on the lower surface, the design feeling is not deteriorated as compared with the case where it is provided on the front surface.

Moreover, when the turning force is transmitted from the adjusting bolt side to the operating portion, the rotation of the adjusting bolt is transmitted to the operating portion via the power transmission mechanism, so that the adjusting bolt itself is extremely large to rotate. A force is required, so to speak, the operation part and the power transmission mechanism act as a lock, and the loosening of the adjustment bolt can be positively prevented. Therefore, the tension of the curtain opening / closing belt can be kept within the allowable range for a long time, the driving force by the drive motor or the manual operation is efficiently transmitted to the curtain opening / closing belt, and the curtain opening / closing operation can be smoothly performed. .

Further, since another jig is used to rotate the operation portion, necessary adjustment can be performed only when necessary, unlike the case where the operation is performed by lowering an annular rope, for example. That is, it is possible to prevent an erroneous operation mistaken for the operation rope of the opening / closing mechanism and a mischief of a child, which contributes to maintaining an appropriate adjustment state for a long time. In addition, there is no obstacle in appearance or use.

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

The drawing shows a tension adjusting device for a curtain opening / closing belt attached to an electric curtain opening / closing device that opens and closes two curtains to the left and right. In FIG. 3, the electric curtain opening / closing device 1 is shown in FIG. A drive pulley 3 and a pulling pulley 4 are axially supported at both left and right ends of a curtain rail 2 installed on the curtain rail 2), and a curtain opening / closing belt 5 is stretched in a loop between the pulleys 3 and 4, and One drive pulley 3 rotates forward and backward by a drive motor 6 with a built-in speed reducer fixed to the right end of the curtain rail 2, and the other pulling pulley 4 tensions fixed to the left end of the curtain rail 2. The curtain opening / closing belt 5 is slidably adjusted in the tensioning direction by the adjusting device 7.

A pair of leading runners 8 and a plurality of hanging runners 9 are slidably inserted into the curtain rail 2 described above,
A pair of leading runners 8 and 8 are inserted at an intermediate position where the hanging runners 9 are divided into two, and two curtains are inserted through the pair of leading runners 8 and 8 and the hanging runners 9. 10 and 10 are hung on the left and right respectively.

As shown in FIGS. 1 and 2, the tension adjusting device 7 described above opens the central portion on the lower surface side of the pulley case 11 formed in a rectangular shape in the longitudinal direction, and bends both side edges of the pulley case 11 inward. The rails 11a, 11a are formed respectively, and the pulley supports 12 inserted into the pulley case 11 are slidably held by these rails 11a, 11a.

The above-mentioned pulley support 12 axially supports the pulling pulley 4 in a space 13 formed on the upper stage side so as to be horizontally rotatable, and the bolt support parts 14, 14 vertically laid on the front and rear parts on the lower stage side have respective bolts. Insertion hole 1
4a and 14a are formed respectively.

Each bolt insertion hole 1 formed in each of these bolt support parts 14, 14
An adjusting bolt 15 formed to have a length necessary for tensioning the curtain opening / closing belt 5 is rotatably inserted into the 4a and 14a, and the adjusting bolt 15 is screwed between the bolt supporting portions 14 and 14. A nut 16 is screwed on the threaded portion 15a of the coil spring, and a coil spring is provided between the nut support 16 and the bolt support portion 14 on the left side of the drawing which is vertically provided on the side where the curtain opening / closing belt 5 is tensioned.
17 intervening.

The curtain rail 2 is inserted and fixed in the opening on the front end side of the pulley case 11, and the gear case 18 is fixed in the opening on the base end side.

The adjustment bolt 15 is rotatably supported on the right side surface of the gear case 18, and the operation portion 19 is rotatably supported on the lower surface side, and a gear fixed to the base end of the adjustment bolt 15 is supported. 20
A bevel gear mechanism 21 that bends the transmission direction is formed by meshing a gear 20 fixed to the upper end of the operation unit 19 with each other.

The above-mentioned operation portion 19 engages with a rotation operation tool such as a driver or a wrench to perform a rotation operation.

Hereinafter, a method of adjusting the tension of the curtain opening / closing belt 5 stretched around the curtain rail 2 will be described.

First, by engaging a rotating operation tool such as a screwdriver or a wrench from the lower surface side of the curtain rail 2 with the operation portion 19 of the tension adjusting device 7 fixed to the left end portion of the curtain rail 2, and rotating it. As shown in FIG. 1, the turning force of the operating portion 19 is transmitted to the adjusting bolt 15 via the gears 20, 20 of the bevel gear mechanism 21, and the nut 16 screwed to the adjusting bolt 15 causes the coil spring 17 to move. The pulley support 12 is moved in the direction of the arrow.

That is, when the pulling pulley 4 is moved in a direction in which the curtain opening / closing belt 5 is tensioned, the coil spring 17 is not compressed until the curtain opening / closing belt 5 is tensioned, and when the tension reaches a certain degree, Adjustment bolt
By rotating the nut 15, the nut 16 moves to compress the coil spring 17, and the biasing force of the coil spring 17 holds the curtain opening / closing belt 5 in a tensioned state to a predetermined tension.

As a result, the driving force of the drive motor 6 is efficiently transmitted to the curtain opening / closing belt 5 via the drive pulley 3, and the opening / closing operation of the curtains 10 can be smoothly performed.

Since the operation unit 19 of the tension adjusting device 7 is rotated from the lower surface side of the curtain rail 2 in this manner, the operation allowance range of the operation unit 19 is wide, and the operation unit 19 is operated until the curtain opening / closing belt 5 has a predetermined tension. It is possible to rotate 19 continuously.
Eliminates the need to replace the rotating operation tool many times as in the conventional device, and the tension of the curtain opening / closing belt 5 can be easily adjusted using a commercially available screwdriver or wrench, improving workability. To do. Further, since the pivotal support of the operation portion 19 is provided on the lower surface of the curtain rail 2, the design feeling is not deteriorated as compared with the case where it is provided on the front surface.

Moreover, since the rotation of the adjustment bolt 15 is transmitted to the operation portion 19 via the bevel gear mechanism 21, the load resistance is larger than the rotation of the adjustment bolt 15 itself and the loosening of the adjustment bolt 15 is positively prevented. The tension of the curtain opening / closing belt 5 can be maintained within the allowable range for a long time.

Further, since another jig such as a screwdriver or a wrench is used to rotate the operation section 19, unlike the case where the annular rope is lowered to rotate, for example, adjustment necessary only when necessary Can be done. That is, it is possible to prevent an erroneous operation by mistake with an operation rope (not shown) of the opening / closing mechanism and a mischief of a child, which contributes to maintaining an appropriate adjustment state for a long time. In addition, there is no obstacle in appearance or use.

In the correspondence between the configuration of the present invention and the above-described embodiment, the power transmission mechanism of the present invention corresponds to the bevel gear mechanism 21 and the gears 20 and 20 of the embodiment. It is not limited to the configuration.

For example, the adjusting bolt 15 and the operating portion 19 described above may be connected via a worm mechanism including a worm and a worm wheel. In the case of this worm mechanism, the operating portion
By providing the worm on the 19 side and the worm wheel on the adjusting bolt 15 side, it is possible to reliably prevent the adjusting bolt 15 from rotating other than during adjustment.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is an enlarged vertical side view of the tension adjusting device, Fig. 2 is a vertical sectional view taken along the line AA of Fig. 1, and Fig. 3 is a curtain. It is a front view of an electric curtain opening / closing device that opens and closes to the left and right. 2 …… Curtain rail, 4 …… Drawing pulley 5 …… Curtain opening / closing belt, 7 …… Tension adjusting device 12 …… Pulley support, 15 …… Adjusting bolt 19 …… Operating part, 21 …… Bevel gear mechanism

Claims (1)

[Scope of utility model registration request] 1. A tension adjusting device for a curtain opening / closing belt, which adjusts the tension of a curtain opening / closing belt stretched on the pulley by moving a pulley axially supported on the end of the curtain rail by screw feeding of an adjusting bolt. The pivoting adjustment lever is pivotally supported on the end of the curtain rail, and the operation part can be pivoted on the lower surface of the end of the curtain rail with other jigs such as bolts and wrenches. A curtain opening / closing belt tension adjusting device which is rotatably supported by the above and which connects the operating portion and the end portion of the adjusting bolt by a power transmission mechanism.