JPH0126869Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a bracket for supporting a corner shaft at the end of a roll blind.

A round shaft projects from one end of the roll blind, and a square shaft projects from the other end, one round shaft being rotatably supported by a bracket and the square shaft being fixedly supported by the other bracket. As shown in Figure 1, conventional brackets that support square shafts have an entrance located at a considerable distance both vertically and horizontally from the fixed position of the square shaft, in order to prevent the square shaft from falling off. Ta.
As a result, a problem arises in that the operation space required when installing the roll blind becomes large, and the roll blind cannot be installed close to a ceiling or wall, or placed in a narrow box. Also, with conventional brackets, the roll blind can be removed regardless of the state of the roll blind clutch, so if you remove the roll blind from the bracket without knowing that the clutch is broken, the roll blind will start idling the moment you remove it. There was also the problem that it was dangerous.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by providing a bracket which requires a small space for installing a roller blind and which prevents the roller blind from coming off unless the clutch is engaged.

In order to solve the above problems, the bracket of the present invention consists of a mounting bracket, a synthetic resin cup fixed to the mounting bracket, and a synthetic resin cover rotatably assembled to the cup. It is equipped with a square groove that supports the shaft, and the width and depth of the entrance of the square groove are approximately equal to the width and length of the cross section of the square shaft, but the width of the bottom is slightly wider than the width of the entrance, and when the cover is closed, the cover is closed. The claw elastically engages the protrusion of the cup. If you try to remove the square shaft from the square groove with the roll blind clutch disengaged, the nail will hit the square shaft, making it impossible to remove the roll blind from the bracket.

The bracket of the present invention will be explained based on an embodiment shown in the drawings. As shown in Figures 2 and 3,
A square hole 11 is made in a mounting bracket 1, a protruding corner part 21 of a cup 2 made of synthetic resin is fitted into the square hole to determine the position, and the cup 2 is fixed to the bracket 1 with a rivet 12. A square groove 22 is provided in the center of the cup 2, and the circumferential wall of the groove is made slightly higher than the outer circumferential wall. Square groove 22
The width of the entrance is the corner axis of the roll blind (Figure 5)
is approximately equal to the width of the cross section of the angular axis, and the depth is approximately equal to the length of the cross section of the angular axis, but the width at the bottom is slightly wider than the entrance. The bottom side of the square groove 22 and the lower side 27 are perpendicular to each other, and the upper side 25 is obliquely intersected with the bottom side. Upper side 25 of square groove 22
A shaft 23 extending toward the metal fitting 1 is formed at the end of the cup 2 as an extension of the shaft 23, and the shaft hole 33 of the cover 3 is fitted into the shaft 23, as shown in FIG. cover 3
is partially rotated about the shaft 23 as shown by the chain line in FIG. 1 to open and close the entrance of the square groove 22 of the cup 2. A convex portion 34 is provided at the tip of the cover 3, and the cover 3
When the cup 2 is closed, its convex portion is elastically latched to a concave portion 24 provided on the outer periphery of the lower end of the cup 2. The outer peripheries of the cup 2 and the cover 3 are arcuate and have the same height, and when the cover is closed, they appear to be a single cylinder, the outer diameter of which matches the outer diameter of the roll pipe of the roll blind.

As shown in FIG. 1, a notch is provided between the shaft portion 23 of the cup 2 and the upper side 25 of the square groove 22,
form 6. There is a claw 3 near the center of rotation of the cover 3.
6, and when the cover 3 is closed, its claws are elastically latched onto the protrusions 26 of the cup 2.

Next, the relationship between the bracket and the roll blind of the present invention will be explained. Although not shown, the round shaft at the end opposite to the square shaft of the roll blind is inserted into the round hole bracket 5 shown in FIG.
As shown in the figure, the square shaft is inserted into the square groove 22 of the cup 2. At this time, the square shaft 4 moves from the position indicated by the chain line to the position indicated by the solid line, but the distance it moves in the vertical and horizontal directions is very short, so the space required to install the roll blind is significantly greater than that of conventional roller blinds. small. Therefore, it is possible to install the roll blind closer to the ceiling or wall surface than before, and it can also be placed in a narrow box where it could not be installed in the past.

As shown in FIGS. 9 to 12, the centrifugal clutch has a rotating groove 42 provided on a rotating body 41 that is integrated with the roll pipe 40 of the roll blind, and a fixed body 43 that is integrated with the square shaft 4. Fixed groove 44
and a ball 45 placed in those grooves. A spring 46 is interposed between the extension ends of the roll pipe 40 and the square shaft 4, and the spring rotates the roll pipe 40 in the screen winding direction.

When the screen 47 is lowered, the roll pipe 4
0 and the rotating body 41 rotate in the direction of the arrow in FIG. The wall on the inside of the fixing groove 44 in the direction in which the screen is lowered has a gentle slope, and as shown in FIG.
5 falls into the fixed groove 44, it returns to the rotating groove 42 again, so the clutch does not engage when lowering the screen. However, as shown in FIG. 12, if the ball 45 falls into the fixing groove 44 when winding up the screen,
The wall of the fixing groove 44 on the screen winding direction side has a steep slope, and the ball 45 does not return to the rotating groove 42, so the clutch is engaged and rotation of the rotating body 41, that is, the roll pipe 40 is prevented. In order to prevent the balls 45 from falling into the fixing grooves 44 when winding up the screen, the screen 47 is released at a position where the balls 45 are out of the fixing grooves 44, and a centrifugal force is applied to the balls 45 to prevent them from falling into the fixing grooves 44. You must do so. Conversely, in order to engage the clutch, the screen must be released at the position where the ball 45 enters the fixing groove 44.
When the screen is released and the clutch is engaged, the resilient force of the spring 46 acts impulsively on the clutch. At this time, as shown in FIG. 7, the square shaft 4 comes into contact with the lower side of the square groove 22 due to gravity, and the elastic force of the spring acts in the direction of arrow A, but the square groove 22 is located at the bottom of the groove 22 rather than the entrance. Since the width is wide, the square shaft 4 can rotate slightly in the A direction and escape. Therefore, compared to the case where the square shaft has no relief at all, the impact applied to the clutch ball and fixed body is considerably reduced.

When the screen is caught on a cover or the like, the roll pipe stops with the ball remaining in the rotation groove, that is, without the clutch being engaged. If the roll blind is removed from the bracket in this condition, the square shaft or roll pipe will suddenly rotate due to the force of the spring, which is extremely dangerous. However, in the case of the bracket of the present invention, when the roll pipe of the roll blind without the clutch is grasped and an attempt is made to remove it from the cup 2 of the bracket, the spring 46 shown in FIG. In order to rotate the shaft 4 in the direction of arrow B, the corner shaft 4 is
I try to get out while making line contact with 7, but the square shaft 4
hits the claw 36 of the cover 3 and cannot come out of the square groove 22. Therefore, when the roll pipe is turned slightly in the direction of the arrow and the clutch is engaged, the spring built into the roll blind turns the square shaft 4 around the tip of the lower side 27 in the direction opposite to arrow B. The square shaft 4 fits into the square groove 22 without hitting the pawl 36.
It's about time to get out. Therefore, it is not possible to remove the roll blind from the bracket unless the clutch is engaged, so it is not possible to remove the roll blind from the bracket without the clutch engaged and run into danger, as in the past. It doesn't happen.

As mentioned above, when the cup and cover are closed, the bracket of the present invention has a cylindrical shape with the same outer diameter as the roll pipe, so it has a good appearance. Since it has a direct opening, the depth of which is approximately equal to the length of the cross section of the corner shaft, the operating space required for mounting the roller blind on the bracket is very small.
Therefore, the bracket of the present invention allows the roller blind to be installed close to the ceiling or wall, or to be placed in a narrow box. In addition, the bracket of this invention, if the clutch is disengaged,
Since the roll blind cannot be removed, the danger of removing the unclutched roll blind from the bracket is obviated. Furthermore, the bracket of the present invention can absorb the impact when the screen is stopped by the play of the square shaft, thereby extending the life of the clutch mechanism.

[Brief explanation of the drawing]

Fig. 1 is an inner side view of a conventional bracket, Fig. 2 is a view corresponding to Fig. 1 of a bracket according to an embodiment of the present invention, and Figs. 3 and 4 are - and - lines in Fig. 2. Figure 5 is a view corresponding to Figure 2 of the opposite bracket, Figure 6 is a view showing the square shaft of the roll blind fitted into the bracket, Figure 7 is the roll blind when the screen is stopped. Figure 8 is a diagram showing the relationship between the angle axis and the bracket, and Figure 8 is a diagram showing the state when a roll blind whose clutch has been disengaged is being removed from the bracket. FIG. 9 is a sectional view of the main part of the roll blind, FIGS. 10 to 12 are front views of the clutch mechanism shown in FIG. 9, and FIGS. Each figure shows the clutch in the engaged state. 1... Mounting bracket, 2... Cup, 3... Cover, 22... Square groove, 23... Shaft, 24... Recess, 25... Upper side, 26... Protrusion, 27... Lower side , 33... shaft hole, 34... convex part, 36...
nail.

Claims (1)

[Claims for Utility Model Registration] 1. When a synthetic resin cup 2 is combined with a synthetic resin cover 3 so as to be able to open and close freely, said cup is fixed to a mounting bracket 1, and said cover is closed on said cup. The outer circumferences of the cover and the cup are formed in an arc shape so that the outer shapes of the cover and the cup are cylindrical, and a square groove 22 is provided on the inner circumference side of the cup,
The width and depth of the entrance of the square groove are approximately equal to the width and length of the cross section of the square shaft 4 of the roll blind, and the width of the bottom is slightly wider than the width of the entrance, and the upper side 25 of the square groove is extended. The center of rotation of the cover is provided at the upper end, and a claw 36 is provided near the center of rotation of the cover.
and forming a protrusion 26 on the cup so that when the cover is closed, the pawl and the protrusion are elastically engaged, and the square shaft is guided from the square groove along its lower side 27. A bracket for a roll blind, characterized in that when an attempt is made to take it out, the claw hits the square shaft and prevents the bracket from escaping from the square groove. 2. Claims for registration of a utility model characterized in that the cup is formed with a shaft portion 23 extending toward the mounting bracket, and the shaft hole 33 of the cover is fitted into the shaft portion so that the two are rotatably combined. A bracket for a roll blind according to item 1. 3. A utility model registration claim, characterized in that a convex portion 34 is formed at the tip of the cover, and when the cover is closed, the convex portion is elastically engaged with a concave portion 24 formed on the outer periphery of the cup. Bracket for the roll blind described in item 1.