JP2020084636A - Winding type blind - Google Patents

Abstract

To provide a blind in which a screen is smoothly and slowly wound up even if a winding shaft is inclined or bent.SOLUTION: The present invention includes: a screen 1; a tubular winding shaft 2 which winds the screen 1; a pair of support brackets 31, 32 which rotatably support the winding shaft 2; a fixed shaft 4 which is housed in the winding shaft 2 and whose one end is fixed to the support bracket 31; an elastic member 5 which is provided so as to span between the fixed shaft 4 and the winding shaft 2; and a rotary damper 6 which is provided at the other end of the winding shaft 2. The other end of the winding shaft 2 is journaled to the support bracket 32 through the rotary damper 6, the rotary damper 6 has a damper body fixed to the support bracket 32 and a rotor connected to the other end of the winding shaft 2 and rotating together with the winding shaft 2, and the other end of the winding shaft 2 and the rotor constitute a spherical joint.SELECTED DRAWING: Figure 1

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding blind, and more particularly to a blind having a mechanism for reducing a winding speed.

For example, in supermarkets, convenience stores and the like, in order to prevent cold air from being scattered from the cold storage shelves displaying fresh foods at night, a blind having a retractable screen is provided in front of the cold storage shelves.

FIG. 6 shows a conventional wind-up blind 900. The wind-up blind 900 pulls out the screen 1 against the elastic force of the coil spring 5 provided on the winding shaft 2 and pulls the handle 13 at the lower end of the screen 1. It is configured to fix the spread screen by engaging with the hook of the cold storage shelf, and when the handle is removed from the hook, the elastic force of the coil spring 5 automatically winds the screen 1.

However, since the roll-up blind 900 rolls up vigorously, there is a risk of injuring a human being who operates it, and the bearing 906 and the shaft end member 923 are damaged due to repeated impacts when rolling up. I was afraid.

Therefore, the inventor of the present invention contemplates that a rotary damper is provided at one end of the winding shaft to reduce the momentum at the time of winding. Such a technique is also described in Patent Document 1, for example.

Japanese Unexamined Patent Publication No. 10-153069

However, in the winding blind, the coil spring for winding up the winding shaft is provided only on one end side of the winding shaft, and the rotary damper for reducing the winding speed is provided only on the other end side. There is a possibility that the product may be tilted or bent to hinder winding, or the rotary damper or bearing may be damaged.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a blind in which the winding shaft rotates smoothly even if the winding shaft tilts or bends, and the rotary damper and the bearing are less likely to be damaged. And

The invention made to solve the above problems is a wind-up blind configured to reduce the winding speed, and includes a screen, a tubular winding shaft that winds the screen, and a rotation of the winding shaft. A pair of support brackets that rotatably support, a fixed shaft that is housed in the winding shaft and has one end fixed to the supporting bracket, and provided so as to bridge between the fixed shaft and the winding shaft. And an elastic member that generates an elastic force in a direction of rotating the winding shaft in the opposite direction when the winding shaft rotates with respect to the fixed shaft, and is provided at the other end of the winding shaft. A rotary damper, the other end of the winding shaft is pivotally supported by the support bracket via the rotary damper, the rotary damper includes a damper main body fixed to the support bracket, and the winding body. It has a rotor connected to the other end of the shaft and rotating together with the winding shaft, and the other end of the winding shaft and the rotor constitute a spherical joint.

In the blind according to the present invention, the winding shaft is tilted because the other end of the winding shaft is swingable with respect to the rotary damper by connecting the winding shaft and the rotary damper with the spherical joint as described above. Even if the screen is bent or bent, the screen can be smoothly wound, and damage to the rotary damper and the bearing can be suppressed.

Further, the support bracket has a through hole penetrating in the longitudinal direction of the winding shaft, and the rotary damper inserts the rotor into the through hole from the outside in the longitudinal direction of the supporting bracket to wind the winding. It is preferable that the other end of the take-up shaft can be connected.
By doing so, the rotary damper can be removed from the outside of the support bracket, so that maintenance can be easily performed.

As described above, according to the winding blind of the present invention, even if the winding shaft is tilted or bent, the winding shaft rotates smoothly and the rotary damper and the bearing are less likely to be damaged.

It is a partial cross-sectional top view of the winding blind which concerns on one Embodiment of this invention. FIG. 2 is an enlarged view of the vicinity of the rotary damper of FIG. It is an (a) axis vertical sectional view which shows the rotor of the rotary damper of FIG. 1, and (b) right side view. FIG. 2 is an axially perpendicular sectional view showing, in plan view, an enlarged vicinity of the other end of the fixed shaft in FIG. 1. FIG. 2 is an axially-perpendicular sectional view showing, in plan view, an enlargement of one end of the fixed shaft in FIG. It is a partial cross section top view which shows the winding blind which is not provided with the conventional rotary damper.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a roll-up blind 100 according to an embodiment of the present invention. The winding blind 100 is housed in the winding shaft 2, a screen 1, a tubular winding shaft 2 that winds the screen 1, a pair of support brackets 31 and 32 that rotatably supports the winding shaft 2. The fixed shaft 4 having one end fixed to the support bracket 31, a coil spring (elastic member) 5 provided so as to bridge between the winding shaft 2 and the fixed shaft 4, and the other end of the winding shaft 2. In addition to mainly including the rotary damper 6 provided in the above, a casing 7 for accommodating the wound screen 1 is provided.

The screen 1 includes a screen body 11 made of a rectangular sheet, an end bar 12 provided at a lower end edge of the screen body 11, and a handle 13 fixed to the end bar 12. The upper end of the screen 1 is fixed to the winding shaft 2, and the screen 1 is pulled out by pulling the handle 13. When the handle 13 is released, the screen 1 is wound around the winding shaft 2 by the elastic force of the coil spring 5 and accommodated in the casing 7. To be done.

The winding shaft 2 is provided with a spring fixing member 22 for fixing the coil spring 5 on one end side (right side in FIG. 1) of a winding shaft body 21 made of an aluminum tube, and on the other end side (left side in FIG. 1). A brake receiving member 23 that engages with the rotary damper 6 is provided. As shown in FIG. 5, the spring fixing member 22 is made of a resin-made thick cylindrical member, and has an annular protrusion 22 a for locking the end of the winding shaft main body 21 to the outer peripheral surface and one end of the coil spring 5. And a spring end groove 22b that locks.
As shown in FIG. 2A, the braking receiving member 23 has a cylindrical shape having a step, and has a connecting portion 23a inserted inside the winding shaft main body 21 and an outer diameter larger than that of the connecting portion 23a. The brake receiver 23b has a large inner diameter. The inner peripheral surface of the braking receiving portion 23b is formed in a cylindrical shape, and is configured to contact a rotor 63 of the rotary damper 6 described later.

As shown in FIG. 2B, the pair of support brackets 31 and 32 has a mountain-shaped support portion 3a and a rectangular base portion 3b formed in an L shape in a side view.
As shown in FIG. 5, the support bracket 31 on the one end side has a fixed bearing 3d that fixes and supports the fixed shaft 4 inside the support portion 3a. As shown in FIG. 2A, the support bracket 32 on the other end side has a circular through hole 3c in the support portion 3a for inserting the main body portion of the rotary damper.

In the casing 7, the side wall 7a on the front side (left side in FIG. 2B) when the blind is installed is formed in a gutter shape higher than the side wall 7b on the back side (right side in FIG. 2B). The pair of support brackets 31 and 32 are attached to both ends of the casing 7 in the longitudinal direction so as to face each other with the base portion 3b inside.

As shown in FIG. 1, the fixed shaft 4 includes a fixed shaft body 41 made of an aluminum tube, a resin-made fixed support member 42 provided on one end side (right side in FIG. 1) of the fixed shaft body 41, and a fixed shaft body. And a resin spring fixing member 43 provided on the other end side of 41. As shown in FIG. 5, the fixed support member 42 includes a caulking fixing portion 42a (shown by a broken line in FIG. 5) which is inserted into one end of the fixed shaft main body 41 and caulked and fixed, and a ring-shaped convex strip. A locking strip 42b that locks the fixing member 22, a bearing 42c that rotatably supports the winding shaft 2 (spring fixing member 22), and a key that fixes the fixed support member 42 to the support bracket 31 non-rotatably. And a portion 42d.

The coil spring (elastic member) 5 is wound to have substantially the same length as the fixed shaft 4, and one end side (right side in FIG. 1) has a spring end groove 22b of the spring fixing member 22 as shown in FIG. It is fixed to. The other end side (left side in FIG. 5) of the coil spring 5 is inserted into a notch 41a provided at an end edge on the other end side (left side in FIG. 1) of the fixed shaft body 41 and caulked, and a cap-shaped spring is fixed. The member 43 is fixed to the fixed shaft body 41 by being attached onto the coil spring 5 (see FIG. 4). In this manner, the coil spring 5 has one end fixed to the winding shaft 2 and the other end fixed to the fixed shaft 4, and the portion between the fixed shaft 4 and the winding shaft 2 in the claims is defined. It is in a state where it is installed so as to be bridged. When the winding shaft 2 rotates with respect to the fixed shaft 4, the coil spring 5 generates an elastic force in a direction of rotating the winding shaft in the opposite direction.

As shown in FIG. 1, the fixed shaft 4 is housed inside the winding shaft 2 in a state in which a coil spring 5 is mounted. As shown in FIG. 5, the fixing support member 42 of the fixed shaft 4 is inserted into the spring fixing member 22, and the spring fixing member 43 has an outer peripheral surface whose inner peripheral surface is the inner peripheral surface of the winding shaft body 21, as shown in FIG. Is in sliding contact with.

As shown in FIG. 2, the rotary damper 6 includes a damper body 61, a rotating shaft 62 extending from the damper body 61, a rotor 63 fitted to the tip of the rotating shaft 62, and a downward direction from the damper body 61. A plate-shaped mounting bracket 64 that extends to fix the damper body 61 to the support bracket 32 is provided. A damping mechanism (not shown) is provided inside the damper body 61, and is configured to suppress the rotation of the rotor 63. The rotary damper 6 is not particularly limited, but an oil type is used, for example.

The rotor 63 and the brake receiving member 23 form a spherical joint. That is, as shown in FIG. 2( a ), the braking surface 63 a, which is the side peripheral surface of the rotor 63, can be transmitted to the braking receiving surface 23 c, which is the inner peripheral surface of the braking receiving portion 23 b of the braking receiving member 23. Touching. The braking surface 23c is formed into a cylindrical shape, while the braking surface 63a is formed into a spherical surface, and the winding shaft 2 is tilted or bent, so that the axis of the braking surface 23c becomes the braking surface 63a ( Even when the braking surface 63a is inclined with respect to the axis of the rotating shaft 62), the braking surface 63a can transmit the braking torque to the braking receiving surface 23c while moving the contact portion with respect to the braking receiving surface 23c.

As shown in FIG. 2( a ), the rotary damper 6 has the damper main body 61, with respect to the through hole 3 c of the support bracket 32, outside the support bracket 32 in the longitudinal direction of the winding shaft 2 (the left side of FIG. 2( a )). ), and is fixed to the support bracket 32 by a screw by a mounting bracket 64. In this way, the rotary damper 6 can be attached to and detached from the support bracket 32 from the outside, so that maintenance is easy.

Next, a method of using the roll-up blind 100 according to the present embodiment and the operation/effect of each part will be described.
When the roll-up blind 100 is used, the handle 13 is pulled down and the screen 1 is pulled out. When the screen 1 is pulled out, the winding shaft 2 around which the screen 1 is wound rotates around the fixed support member 42 and the rotary shaft 62 of the rotary damper 6. Then, the one end of the coil spring 5 fixed to the spring fixing member 22 of the winding shaft 2 rotates together with the winding shaft 2. On the other hand, since the other end of the coil spring 5 is non-rotatably fixed to the other end of the fixed shaft 4, the coil spring 5 is deformed to be twisted. In this way, the coil spring 5 generates an elastic force, and the screen 1 is pulled out against this. By locking the handle 13 to a hook or the like, the screen 1 is maintained in an expanded state.

When housing the screen 1, the handle 13 is detached from a hook or the like. Then, the coil spring 5 tries to return to its original shape by the elastic force due to the torsional deformation, and the winding shaft 2 is rotated in the direction opposite to the direction in which the screen 1 is unfolded, and the screen 1 is wound up on the winding shaft 2. ..

At this time, the rotation torque of the winding shaft 2 is transmitted to the damper main body 61 via the braking surface 23c of the braking member 23, the braking surface 63a of the rotary damper 6, and the rotating shaft 62. The damper body 61 generates a braking torque as a reaction to this turning torque, and transmits the braking torque to the winding shaft 2 through the rotary shaft 62 of the rotary damper 6, the braking surface 63a, and the braking receiving surface 23c. In this way, the winding speed of the winding shaft 2 is moderated.

Here, the winding shaft 2 may be tilted or bent due to imbalance in its internal structure, weight of the screen 1, inertial force, or the like. However, in the wind-up blind 100 of the present embodiment, even when the winding shaft 2 is inclined at the position where it engages with the rotary damper 6, the rotor 63 of the rotary damper 6 has a spherical braking surface 63a. Therefore, the braking receiving surface 23c of the braking receiving member 23 of the winding shaft 2 rolls with respect to the braking surface 63a, and the contact between the braking surface 63a and the braking receiving surface 23c is maintained. In this way, the winding shaft 2 can wind up the screen 1 smoothly and while reducing the speed even when the winding shaft 2 is inclined or bent.

The hoisting type blind of the present invention is not limited to the above-mentioned embodiment, for example, the braking receiving surface 23c may have a spherical shape in accordance with the braking surface 63a, or the braking surface 63a may have a cylindrical shape. The braking receiving surface 23c may have a convex spherical shape protruding inward. The rotary damper 6 may be attached from the inside of the support bracket 32. Further, the casing 7 can be omitted. The elastic member is not limited to the coil spring, and a known member such as a spring and rubber can be appropriately used.

Roll-up blind 100,900
Screen 1
Winding shaft 2
Support brackets 31, 32
Fixed shaft 4
Coil spring (elastic member) 5
Rotary damper 6
Damper body 61
Rotor 63
Through hole 3c

Claims (2)

A wind-up blind configured to reduce the winding speed,
Screen and
A tubular winding shaft for winding the screen,
A pair of support brackets that rotatably support the winding shaft,
A fixed shaft that is housed in the winding shaft and has one end fixed to the support bracket,
The elastic force is provided so as to bridge between the fixed shaft and the winding shaft, and the winding shaft rotates with respect to the fixed shaft to rotate the winding shaft in the opposite direction. An elastic member that causes
A rotary damper provided at the other end of the winding shaft,
The other end of the winding shaft is pivotally supported by the support bracket via the rotary damper,
The rotary damper includes a damper body fixed to the support bracket, and a rotor that is connected to the other end of the winding shaft and rotates together with the winding shaft.
The winding blind, wherein the other end of the winding shaft and the rotor form a spherical joint. The support bracket has a through hole that penetrates in the longitudinal direction of the winding shaft,
The roll-up blind according to claim 1, wherein the rotary damper is configured so that the rotor can be inserted into the through hole from the outside in the longitudinal direction of the support bracket and connected to the other end of the winding shaft.

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