JPH0412906Y2 - - 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 part for adjusting the extension angle of an arm of a seat support device that constantly urges the seat in the direction of extension.

(Prior art) As a conventionally known adjustment part for the extension angle of a support device such as a cloth blind, for example, the invention disclosed in Japanese Patent Application Laid-Open No. 55-95763 has a structure that can be bent and extended by means of a pivotally supported joint fitting. The base of the arm on the inner winding shaft side of the two connected arms is attached to the arm support plate, which is rotatably attached to the inner surface of the bracket that is attached to the wall of the building, etc., with the center axis of the flexible pin. The projecting angle adjustment section is provided with a fixing bolt passed through a predetermined hole of a plurality of angle adjustment holes drilled at equal intervals on the circumference of the projector.

(Problem to be solved by the invention) However, in the above case, there was a problem in that the angle could not be finely adjusted because it was not possible to make too many angle adjustment holes. An object of the present invention is to provide an adjustment section for the arm extension angle of a blind sheet support device, which allows the above-mentioned extension angle to be finely adjusted.

(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 sunshading and rain protection for the blind, and 1 is sheet S. A winding drum having one end 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. Reference numeral 2 denotes a front frame having a sliding part for a locking body of an arm A to be described later, which is made of an extruded hollow profile of aluminum alloy or the like, which is fixed to the opposite end of the winding drum 1 side of the sheet S, and 2a is made of cloth which is fixed to the front frame 2. The apron, 3, is a left and right bracket having bearings 3a for supporting the support shafts 1a at both ends of the winding drum 1, and is firmly fixed to the storefront of a store, a window, or a wall above the eaves of a window in a house. 4
Insert the end of the tube end support fitting 6 at the base into the receiving hole 5a of the dish-shaped metal connector 5, and then insert the pivot pin 5b.
A cylindrical arm member 4a, which is an extruded hollow member made of aluminum alloy with a square, rectangular, or circular cross section, is fixed to one end of the tube end support fitting 6, and the other end of the first arm of the bendable and extensible arm A pivotably supported by fixes the joint fitting K1. 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. A second arm of arm A that is equipped with a locking body such as a locking roller, and a joint fitting K1.
and K2 are provided with a shoulder portion 8a that limits the angle of rotation to the outside, and the joint fitting K2 is provided with a guide groove 8b for guiding a wire (described later). 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 mutual engagement when the tension spring B is stretched or contracted by compression force from the stretched state. To prevent.
Reference numeral 11 denotes a ring-shaped wire 12 at the opposite end of which a 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 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 ring-shaped portion from both sides. The wire 12 is made by twisting together a large number of thin steel wires, and each end is folded back with a stopper 12a to form ring-shaped parts 12b and 12c of different sizes. is the synthetic resin pipe 1 shown in Figure 1a.
3 or coated with a synthetic resin material 13. Reference numeral 14 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. Two-way connecting fitting 15 via pin 14b via pipe s
Clamp from both sides. A connecting rod 16 has one end fixed to the bifurcated connecting fitting 15 and the other end 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 the annular locking portion of the above-mentioned connecting body 5, and a first ring is attached to both this and the annular locking portion 3c of the arm connecting portion 3b of the bracket 3 to be locked.
Annular serrated engagement surface 1 with the same shape and small pitch as shown in Figure b
Place 8. 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 feeding out the rolled up sheet S, the rotating shaft M1 of the drive device M provided on one bracket 3 is manually or electrically rotated in the counterclockwise direction. The winding drum 1 is rotated clockwise by M and the sheet S is fed out. Then, 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 body such as a locking roller at the tip (not shown) of the second arm of the arm A, and the first arm 4 has a cylindrical shape. 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 extension direction and rotates the second arm 7 in the expansion direction about the pivot 8 connecting it to the first arm 4 as a fulcrum, so that the seat S is stretched flat without loosening. It is released while maintaining the state of being held. In the above case, the wire of the large ring-shaped portion 12b of the wire 12 is fitted with a synthetic resin pipe 13 shown in FIG. The wire 12 is connected to the guide groove 8 of the joint fitting K2.
Since there is no contact with b, the wire will not be damaged and no noise will be generated due to contact between the wire and the joint fitting. In addition, since the covers 10 are attached to the parallel panels 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 stretched or contracted due to compressive force from the stretched 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.

(Effect of the invention) According to the extension angle adjustment section of the seat support arm of the present invention, the annular sawtooth-shaped engagement surface of the same shape and small pitch is provided on both the connecting body and the annular locking section of the arm connecting section of the bracket. Now that the fixing bolt has been formed, loosen the fixing bolt to separate the engagement of the annular serrated engagement surfaces of the respective annular locking parts of the arm connecting part and the connecting body, and then grasp the arm A and rotate it around the axis of the fixing bolt. When you turn it,
By shifting the relative positions of the small-pitch serrations, it is possible to change and adjust the angle of the arm A and the extension angle of the sheet S by a minute angle.

[Brief explanation of drawings]

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. In the support device for the seat S, the arm A is pivotably supported on the arm A and is formed of a cylindrical arm member 4a or the like.
The annular locking portion 3c of b and the annular locking portion 17 of the connecting body 5
An adjusting portion for adjusting the protrusion angle of the seat support arm, in which an annular serrated engagement surface 18 of the same shape and small pitch is formed on both sides of the seat support arm.