JPH0412905Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a blind made of cloth or the like impregnated or coated with a synthetic resin material that can be rolled up and rolled out, to be installed in the storefronts and windows of shops, or the eaves of windows of houses. This invention relates to a seat support device that constantly urges the seat in the direction of extension.

(Prior art) In conventionally known support devices for fabric blinds, etc., for example, the device disclosed in Utility Model Publication No. 56-34934 uses two tensioners connected in a bendable and extensible manner by a pivotally supported joint fitting. One end of the built-in coil spring was hooked to the base of the arm on the inner winding shaft side of the rod or arm, and the wire connected to the other end was hung on the joint fitting of the arm on the rod or front frame side and fixed inside the front frame side. Equipped with an activation device.

(Problems to be solved by the invention) In the above case, the joint metal fittings are worn out and the wire is damaged during repeated bending and extension of the arm over a long period of time, and also due to friction between the wire and the joint metal fittings during operation. It may generate fricative noise and cause noise disturbances. The object of the present invention is to provide a support device for a blind sheet that can eliminate damage to the wires and joint fittings, generate noise, and allow smooth bending and stretching.

(Structure of the invention, means for solving problems) Hereinafter, the structure of the invention will be described with reference to embodiments of the invention shown in the drawings. First, in Figure 3 showing the entire blind, and Figures 2a and 2b showing details of the parts, S is a long and wide sheet made of cloth for shade and rain protection for the blind, and 1 is a sheet. A winding drum having one end of S fixed in a horizontally elongated manner and wound successively toward the other end is provided with a support shaft 1a at both ends thereof. The winding drum 1 is made of an extruded hollow cylindrical body made of a metal material such as an aluminum alloy or a synthetic resin material, and a steel support shaft 1a is attached to both ends of the drum. A winding spring may be installed inside the winding drum to facilitate operation during rotation. 2 is sheet S
2a is a front frame having a sliding part for a locking body of arm A, which will be described later, which is made of an extruded hollow aluminum alloy member or the like fixed to the end opposite to the winding drum 1 side; 2a is a cloth apron fixed to the front frame 2; Reference numeral 3 denotes left and right brackets having bearings 3a for supporting the support shafts 1a at both ends of the winding drum 1, and these brackets are firmly fixed to the storefront of a store, a window, or a wall above the eaves of a window in a house. Reference numeral 4 designates the first arm of the bendable and extensible arms A in which the end of the tube end support fitting 6 at the base is fitted into the receiving hole 5a of the metal dish-shaped connector 5 and is pivotally supported by the pivot pin 5b. A cylindrical arm member 4a made of an extruded aluminum alloy hollow member having a square, rectangular, or circular cross section is fixed to one end of the tube end support fitting 6, and a joint fitting K1 is fixed to the other end. An annular locking portion 17, which will be described later, is provided at the opposite end of the connecting body 5, and is pressed into contact with an annular locking portion 3c of the arm connecting portion 3b of the blind 3 facing the annular locking portion 17, and is fixed by a fixing bolt 3d. Reference numeral 7 denotes a joint fitting K2 that engages with the joint fitting K1 through a pivot 8, a cylindrical arm member 7a fixed thereto which is the same as the above-mentioned cylindrical arm member 4a, and a cylindrical arm member 7a (not shown) that is slidably engaged with the front frame 2 at its tip. The second arm of arm A is equipped with a locking body such as a locking roller, and both joint fittings K1 and K2 are provided with a shoulder portion 8a that limits the outward rotation angle. A guide groove 8b for guiding the wire is provided. Note that M is a drive device for the winding drum 1, which is constituted by a speed reduction mechanism consisting of a worm wheel and a worm gear, for example, and is fixedly installed on one of the brackets 3, and its rotating shaft M1 is rotated manually or electrically. Next, B is a tension spring consisting of a compression spring installed inside the first arm 4, and has the role of always urging the arm A in the direction of extension when the sheet S is fed out.In this embodiment, there are two parallel compression springs 9a. and 9b are installed. A cover 10 made of hard or somewhat soft synthetic resin or metal is fitted over each of the compression springs 9a and 9b to prevent them from engaging with each other when the tension spring B is stretched or contracted by compression force from the stretched state. do. 11
The pin 11a inserted into the ring-shaped portions of both ends of the springs 9a and 9b is sandwiched from both sides, and one end of the wire 12 is fixed to the joint fitting K2 of the second arm 7 with a bolt or the like. It is a plate-shaped connecting fitting that clamps the pin 11b that locks the part from both sides. The wire 12 is made by twisting a large number of thin mesh wires, and each end is folded back and fastened with a stopper 12a to form ring-shaped parts 12b and 12c of different sizes. A synthetic resin pipe 13 shown in FIG. 1a is attached or a synthetic resin coating 13 is applied. 1
Reference numeral 4 denotes a plate-shaped connecting fitting similar to the above-mentioned plate-shaped connecting fitting 11, and a pin 14a inserted through a spacer pipe s into the annular ring-shaped portion of the compression springs 9a and 9b on the connecting body 5 side is sandwiched from both sides. pipe s
The bifurcated connecting fitting 15 is clamped from both sides by the pin 14b via the pin 14b. 16 connects one end to the above bifurcated connecting fitting 1
5, and the other end is hooked to the pivot pin 5b that locks the end of the tube end support fitting 6 and the connecting body 5. Next, reference numeral 17 denotes an annular locking portion of the above-mentioned connecting body 5, and an annular locking portion of the same shape and small pitch as shown in FIG. A serrated engagement surface 18 is provided. In the case of FIG. 2a and FIG. 2b, the circular dish-shaped end surface 5c of the connecting body 5 and the cylinder bottom circular surface 3e of the arm connecting portion 3b facing it are respectively used as the annular locking portions 17 for the annular sawtooth-shaped engagement. In some cases, an annular serrated engagement surface 18 may be provided on the outer periphery of the dish-shaped connecting body 5, and the cylindrical inner peripheral surface 3f of the recessed arm connecting portion 3b in FIG. The locking portion 17 may be provided with an annular serrated engagement surface 18 opposite to the annular serrated engagement surface 18 of the coupling portion 5 .

(Function) The embodiment of the present invention has the above-mentioned partial structure. To explain its function, first, in order to adjust the projecting angle of the arm A, loosen the fixing bolt 3d of the arm connection part 3b of the bracket 3, and then loosen the fixing bolt 3d of the arm connection part 3b of the bracket 3. Separate the annular serrated surface 18 of the annular locking portion 3c of arm A from the annular serrated surface 18 of the annular locking portion 17 of the connecting body 5 of the first arm 4 of arm A, and rotate the arm A by grasping it as required. By tightening the fixing bolt again at the angular position, the extension angle of the blind sheet S is determined. Next, when unwinding the rolled up sheet S, the rotating shaft M1 of the drive device M provided on one of the brackets 3 is manually or electrically rotated counterclockwise. The winding drum 1 is rotated clockwise by M and the sheet S is fed out. As the sheet S is fed out, the arm A is slidably locked to the front frame 2 of the sheet S by a locking member such as a locking roller at the tip (not shown) of the second arm of the arm A, and the arm A slides into the cylindrical shape of the first arm 4. It is installed in the arm member 4a, one end is fixed to the bolt of the joint metal fitting K2 at the base of the second arm 7 via the plate-like connecting metal fitting 11, and the other end is connected to the wire 12 guided in the guide groove 8b of the joint metal fitting K2. The tube end support fitting 6 at the base of the first arm 4 was connected to the bifurcated connecting fitting 15 of the connecting rod 16 which was locked to the pivot pin 5b fixed to the receiving hole 5a of the connecting body 5 via the plate-like connecting fitting 14. The contraction caused by the compressive force of the tension spring B constantly urges the second arm 7 in the direction of extension, and rotates the second arm 7 in the direction of expansion using the drive shaft 8 that connects the first arm 4 as a fulcrum, so that the seat S remains flat without loosening. It is rolled out while maintaining the tension. In the above case, the wire 12
The wire of the large ring-shaped portion 12b is attached with a synthetic resin pipe 13 as shown in FIG. Since the groove 8b is not touched, the wire is not damaged and no noise is generated due to contact between the wire and the joint fitting. In addition, since the covers 10 are attached to the parallel springs 9a and 9b of the tension spring B, the compression springs will not engage with each other when the parallel compression springs 9a and 9b are in the extended state or contracted due to the compressive force from the extended state. It won't happen. Winding the sheet S on drum 1 in the opposite manner as above.
When winding the fabric of the sheet S, when the rotating shaft M1 of the drive device M is rotated in the clockwise direction opposite to the time of feeding, the winding drum 1 rotates counterclockwise and winds up the fabric of the sheet S. At this time, the tip of the second arm 7 is pushed by the front frame 2, and the arm A is gradually bent and folded about the pivot 8, and as a result, the tension spring B consisting of compression springs 9a and 9b is applied to the second arm 7.
It is pulled by the wire 12 that is fixed to the bolt, and gradually shifts from a compressed state to an expanded state.

(Effects of the invention) According to the arm of the invention, when the tension spring consisting of a compression spring built into the first arm is fed out, the base of the second arm 7 is pulled by the wire due to the compression force of the compression spring when the sheet S of the blind is fed out, and the base of the second arm 7 is pivoted. pin 5
The first arm pivots outward with b as the axis, and the second arm accordingly pivots inward with the pivot 8 as a fulcrum while pushing out the front frame in the direction of feeding out the sheet S and also compressing it during winding. Resisting the contraction force of the spring, a winding force stronger than that acts and stretches the spring, but at this time, the guide groove of the joint fitting of the second arm and the wire are connected to the compression force of the tension spring or the winding force of the winding drum. Even if a strong frictional force is applied due to the movement of the wire, the wires in contact are equipped with synthetic resin pipes or coated with synthetic resin, so the metals do not come into direct contact and damage to the wires is avoided. Noise generation due to metal contact can be prevented.

[Brief explanation of the drawing]

FIG. 1a is a plan view of the wire according to the embodiment of the present invention, FIG. 1b is a front view of the annular serrated engagement surface of the annular locking part, and FIG. Fig. 2b is essentially a plan view;
The figure is a perspective view of the entire blind. Explanation of the symbols representing the main parts of the figure, S... Sheet, A... Arm, B... Tension spring, M... Drive device, 1... Winding drum, 1a... Support shaft, 2...
Front frame, 3...Bracket, 3b...Arm connection portion, 3d...Fixing bolt, 4...First arm, 4
a, 7a...Cylindrical arm material, 5...Connection body, 7...
...Second arm, 8...Pivot, 8b...Guide groove,
9a, 9b...Compression spring, 10...Cover, 1
1, 14... Plate-shaped connecting fitting, 11a... Pin, s
...Spacer pipe, 12...Wire, 13...
...Pipe or covering, K1, K2...Joint fittings, 1
5...Two-pronged connecting fitting, 16...Connecting rod, 3c, 1
7...Annular locking part, 3e...Cylinder bottom circular surface, 3f...
...Cylindrical inner circumferential surface, 18...Annular serrated engagement surface.

Claims (1)

[Scope of utility model registration request] Winding drum 1 and spindle 1a of this winding drum 1
The left and right brackets 3 have bearings 3a that support the
A connecting body 5 is separably fixed via the annular locking part 3c of the arm connecting part 3b of the left and right brackets 3 and the annular locking part 17, and the connecting body 5 is rotatable by a pivot pin 5b. The first arm 4 is pivotably supported on the cylindrical arm member 4a, and the first arm 4 is pivotably supported on the
A second arm formed of a cylindrical arm member 7a fixed to a joint fitting K2 having a guide groove 8b that is engaged by a pivot 8 to a joint fitting K1 fixed to the side opposite to the side pivoted by the pivot pin 5b of the arm 4. 7, one end of a tension spring B consisting of a compression spring installed in the first arm 4 is connected to the connecting rod 1 by the pivot pin 5b.
6, the other end is fixed to the joint fitting K2 of the second arm 7, and a synthetic resin pipe 13 is attached to the contact part of the joint fitting K2 with the guide groove 8b, or a synthetic resin coating 13 is attached. The arm of the blind sheet support device is connected to the wire 12 that has been applied.