JP5528066B2 - Blind device - Google Patents

Description

  The present invention relates to a blind device for shielding sunlight and blinding inside a room.

Conventionally, a blind has been used in a window of a house or office in order to block sunlight or blindfold the room. For example, Patent Literature 1 discloses an electric motor type blind that is wound up and opened by an electric motor. The blinds are formed by weaving a large number of elongated rods in parallel and woven with fibers 12 having excellent strength and weather resistance.

JP 11-56594 A

However, in the one shown in Patent Document 1, the fiber 12 woven and connecting the rods is a synthetic fiber having a small stretchability, and it is difficult to greatly stretch the fiber. For this reason, when it is desired to increase the amount of light collected into the room or to introduce wind into the room, it is not possible to respond by changing the clearance between the rods. There is annoyance.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a blind device that can easily change the amount of light collected and the amount of air flow with a simple configuration without winding up the blind.

In order to solve the above-mentioned problem, a feature of the invention according to claim 1 is provided with a blind in which a plurality of rod members formed in a long shape are coupled by a coupling member, and a winding portion for winding the blind. In the soldering device, the sandals are stretched around both ends of two adjacent rod members, and a pair of elastic members that elastically approach the two rod members are adjacent to each other of the plurality of rod members. It is constructed by sequentially stretching between two rod members, and includes a hook that engages with the rod member at the lower end of the blind and restricts the upward movement of the rod member at the lower end. .

In order to solve the above-described problem, the invention according to claim 2 is characterized in that, in claim 1, the mounting load on the two adjacent rod members of the elastic member is the plurality of rod members and the plurality of elastic members. The value obtained by subtracting the total weight of the one rod member and the total weight of the two elastic members from the total weight of the two is larger than a value obtained by dividing the same into two.

In order to solve the above-mentioned problem, the invention according to claim 3 is characterized in that, in claim 1, the attachment load of each elastic member to the two adjacent rod members is the adjoining each elastic member stretched. The total weight of the rod member and the elastic member positioned below the upper rod member of the two rod members is larger than a value obtained by dividing the total weight into two equal parts.

In order to solve the above-described problem, a feature of the invention according to claim 4 is any one of claims 1 to 3.
In the item, the rod member includes a rod and a collar fitted to both ends of the rod, and the collar includes three collar portions and two cylindrical portions defined by the three collar portions. One of the two cylindrical portions of the collar is connected to the cylindrical portion of the collar located above the collar by the elastic member, and the other cylindrical portion is located below the collar. It is connected with the cylindrical part of the collar which is located, and the elastic member.

In order to solve the above-mentioned problem, the invention according to claim 5 is characterized in that, in claim 4 , the elastic member is bent in a dogleg shape, and hook portions at both ends are wound in a roll shape to form a cylindrical portion of the collar. It is a leaf spring to be wound.

In order to solve the above-mentioned problem, a feature of the invention according to claim 6 is any one of claims 1 to 5.
In the item, the winding unit includes an electric motor, a winding drum that is rotationally driven by the electric motor, and a reverse rotation prevention device that prevents reverse rotation of the winding drum.

According to the first aspect of the present invention, the plurality of rod members are connected by the elastic member, and the rod member at the lower end is engaged by the hook and is restricted from moving upward. At this time, by winding up the upper part of the blind by the winding part, the elastic member between the rod members extends, and the gap between the rod members becomes large, so that the amount of light collected and the amount of ventilation can be freely adjusted to a desired size. it can.

According to the second aspect of the present invention, the mounting is greater than the value obtained by dividing the weight of the brace received by the pair of elastic members connected to the uppermost rod member that supports the largest weight among the plurality of rod members. All elastic members are attached by the load. As a result, all the adjacent rod members are urged until the rod members are brought into contact with each other to be equally spaced and have a good appearance. Moreover, since it can be comprised with one type of elastic member, it can respond at low cost.

According to the invention which concerns on Claim 3, each attachment load to two rod members which each elastic member adjoins is the total weight of one rod member and two elastic members from upper direction to the downward direction. They are arranged so as to become smaller at equal intervals by two equally divided values. In this way, each elastic member is attached with a load according to the position of two adjacent rod members to be connected. Therefore, when the blind is rolled up with the hook engaged with the hook, the space between the rod members is increased. The gaps are even and look good.

According to the invention which concerns on Claim 4, a collar is provided with the collar part, The space | interval between each rod member at the time of a blind is fully closed is regulated by making the collar part outer periphery of each rod member contact | abut. . By such a simple and low-cost method, the gap between the rod members when the blind is fully closed can be unified, and the appearance can be improved.

According to the invention which concerns on Claim 5, the low-cost leaf | plate spring bent by the dogleg shape is applied to the elastic member. The leaf spring can be easily fixed by winding the hook portions at both ends around the cylindrical portion of the collar, and can be easily mounted between the rod members having a small mounting space.

According to the invention which concerns on Claim 6, since it comprised so that winding may be wound up with an electric motor, winding amount can be adjusted finely and, thereby, the clearance gap between each rod member can be adjusted freely. In addition, since the reverse rotation prevention device is provided in the winding unit, even if the electric motor is stopped and the winding unit receives an urging force opposite to the winding direction by the elastic member, it can be fixed easily and reliably. .

It is the installation figure to the window of the building of the blind apparatus which concerns on this embodiment. 1 is an overall view of a blind device excluding a hook according to the present invention. It is a clearance gap state figure between rod members at the time of winding up of the blind device concerning the present invention. It is a side view of the blind apparatus which concerns on this invention.

A first embodiment in which a blind apparatus according to the present invention is embodied will be described below with reference to the drawings. The first embodiment described below is an example in which the present invention is applied to an electric blind apparatus that winds up a blind that blocks sunlight or blindfolds by an electric motor. In the following description, “upper and lower” means upper and lower in the direction of gravity, and “left and right” mean left and right in FIGS.

As shown in FIGS. 1 and 2, the blind apparatus 1 according to the present embodiment is disposed outside the window 3 of the building 2 and is driven by an electric motor 11 and a winding unit 10. It consists of the blind 20 connected and a control device (not shown) for controlling the rotation of the electric motor 11.

The winding unit 10 disposed in the upper part of the blind device 1 includes an electric motor 11 that is installed above the window 3 and a winding drum 12 that winds up the connected blind 20. Electric motor 1
1 (for example, a DC motor) is disposed on one side surface of the winding drum 12 (in this embodiment, the right side surface in FIG. 1) and has a function of preventing rainwater from entering as shown in FIG. 26.

As shown in FIG. 2, the electric motor 11 (for example, a DC motor) has a motor rotating shaft 11a,
A worm 27 is integrally provided coaxially with the motor rotation shaft 11a at the tip of the motor rotation shaft 11a. As shown in FIGS. 2 to 4, the worm 27 meshes with a worm wheel 28 that is provided coaxially and integrally with the drum rotation shaft 12a of the take-up drum 12 disposed orthogonal to the motor rotation shaft 11a. Yes. Thereby, the electric motor 11 is driven and the motor rotating shaft 11 is driven.
When a and the worm 27 rotate, the worm wheel 28 meshed with the worm 27 is rotated at a predetermined reduction ratio with respect to the rotation of the motor rotating shaft 11a. As the worm wheel 28 rotates, the take-up drum 12 rotates around the drum rotation shaft 12a, and the blind 20 fixed to the outer periphery of the take-up drum 12 via the two plates 24 is taken up or rewound. At this time, a well-known self-locking function acts between the worm 27 and the worm wheel 28, and the worm is not affected even if rotational torque acts on the drum rotation shaft 12 a of the winding drum 12 to which the worm wheel 28 is fixed. 27 does not rotate. That is, the electric motor 11
Is stopped, the worm 27 has a worm wheel 28 and a winding drum 12.
On the other hand, it acts as a reverse rotation prevention device.

Next, the blind 20 will be described. As shown in FIG. 2 and FIG. 3, the blind 20 is an elastic member that is a connecting member stretched between a plurality of cylindrical rod members 21 formed in a long shape and two adjacent rod members 21. It is comprised by the some leaf | plate spring 22 as a member. The pair of leaf springs 22 are respectively stretched at both end portions of two adjacent rod members 21 so as to make the two rod members 21 approach each other elastically. The blind 20 is configured by a pair of leaf springs 22 being sequentially stretched between two adjacent rod members 21. Each rod member 21 includes a rod member 21a and a collar 23 fixed to both ends of the rod member 21a.

The rod member 21 is formed of a metal extrusion material made of metal, for example, which has a length slightly exceeding the width of the installed window 3. The material is not limited to aluminum, and may be formed of a light metal such as titanium, magnesium, or nickel. Furthermore, polyamide (PA), polybutylene terephthalate (PBT), or polyacetal (P
You may form by resin materials, such as OM). The rod member 2 constituting the blind 20
The number of 1 used is arbitrary, and when the rod members 21 are arranged in parallel in the axial direction and in the vertical direction,
It is preferable that it is the number which covers the window 3 in which the blind 20 is installed. However, this is not the case.

The cylindrical collar 23 is formed of a resin such as polyamide (PA).
The collar 23 has three collar portions 23a having a height of about 1 mm for locking the leaf spring 22.
23b, 23c, and two cylindrical portions 23d, 23e defined by the three flange portions 23a, 23b, 23c. For example, the cylindrical portion 23d is one of the two cylindrical portions 23d and 23e of the collar 23, and the cylindrical portion 23d and the plate of the collar 23 of the upper rod member 21 among the two adjacent rod members 21. It is stretched and connected by a spring 22. At this time, the other cylindrical portion 23e is stretched and connected by the leaf spring 22 and the cylindrical portion 23e of the collar 23 of the lower rod member 21 of the two adjacent rod members 21. Further, the lower rod member 21 is stretched and connected between the cylindrical portions 23 d of the collar 23 by the lower rod member 21 and the leaf spring 22 further than the lower rod member 21. In this way, the rod member 21 is connected to the adjacent lower rod member 21 in the downward direction and alternately stretched between the two cylindrical portions 23d or 23e of the collar 23. And the blind 2
The rod member 21 at the upper end of 0 is the cylindrical portion 2 of the winding drum 12 and the collar 23 as described above.
It is connected to 3d or 23e via two plates 24.

The collar 23 is inserted into both ends of the rod 21a constituting the rod member 21 from the outside of the rod 21a, and is fitted coaxially with the rod 21a. At this time, the axially outer end surface 23f of the collar 23 is disposed closer to the axial center of the rod 21a than the end surface of the rod 21a.
The end surface of the rod 21 a slightly protrudes from the outer end surface 23 f of the collar 23. However, the arrangement is not limited to this, and the outer end surface 23a of the collar 23 and the end surface of the rod 21a may be arranged at the same position in the axial direction, and the outer end surface 23a of the collar 23 is more than the end surface of the rod 21a. The rod 21a may slightly protrude outward in the axial direction. The collar 23 has a projection (not shown) formed on the inner circumferential surface of the collar 23 and a recess (not shown) provided on the surface of the rod 21a. However, the method of fixing the collar 23 to the rod 21a is not limited to this form, and for example, an adhesive may be used.

In addition, the height of the collar parts 23a-23c which determines the light-shielding amount when the blind 20 is fully closed is arbitrarily set. That is, when it is desired to provide sufficient light shielding when the blind 20 is fully closed, the flange 23a
The height of ˜23c may be close to 0, and if a predetermined amount of lighting is desired through the blind 20 even when the blind 20 is fully closed, the height of the flanges 23a-23c corresponding to the desired amount of light is set. That's fine. However, it is preferable that the height of the flange 23a is set in a range of 0 to 3 mm based on the experimental results accumulated so far.

As shown in FIGS. 2 to 4, the plate spring 22 is formed by bending a plate material made of iron, stainless steel, or the like, which is a spring material, into an L shape. At both ends of the bent L-shape, hook portions 22a wound around the cylindrical portions 23d and 23e of the collar 23 and locked are formed.

Here, the arrangement of the leaf springs 22 will be described. The leaf spring 22 connects rod members 21 adjacent to each other in the vertical direction among the rod members 21 constituting the blind 20. The rod members 21 other than the rod members 21 at the upper end and the lower end of the blind 20 include a pair of leaf springs 22 connected to the rod members 21 above the rod members 21 and the rod members below. A pair of leaf springs 22 coupled to 21 are locked and coupled by hook portions 22 a of each leaf spring 22. The four leaf springs 22 are collars 23 at both ends of each rod member 21.
For example, the upper rod member 21 on the outer locking portion 23e of the collar 23.
The hook portions 22a of the leaf springs 22 are connected to each other. At this time, the hook portions 22 a of the leaf springs 22 for connection to the lower rod members 21 are respectively engaged with the cylindrical portions 23 d on the inner side in the axial direction of the collar 23. Thus, in order to connect each rod member 21 with each upper rod member 21 and each lower rod member 21, each leaf spring 2
In the vertical direction, the hook portions 22a are arranged alternately in the cylindrical portions 23d and 23e of the collars 23 in the vertical direction so that the leaf springs 22 do not interfere with each other.

Next, the mounting load of each leaf spring 22 will be described. Here, the mounting load is the adjacent 2
In a state where the rod members 21 are closest to each other, the rod springs 21 adjacent to each other when the leaf springs 22 are stretched between the cylindrical portions 23d or 23e of the collars 23 are arranged.
The magnitude of the load that urges them toward each other.

The mounting load of each leaf spring 22 is obtained by subtracting the total weight of one rod member 21 and two leaf springs 22 from the total weight of the plurality of rod members 21 constituting the blind 20 and the plurality of leaf springs 22. The load is set to be slightly larger than the value obtained by dividing the obtained value into two equal parts. That is, the attachment load of each leaf spring 22 is the leaf spring 22 stretched around the rod member 21 at the upper end of the blind 20.
It is set with a load slightly larger than the weight of the blind 20 and urges the two adjacent rod members 21 in a direction in which the gap between the rod members 21 is reduced.

Thus, the mounting load of the leaf spring 22 is set so that the rod member 21 at the upper end receiving the largest load among the rod members 21 and the second rod member 21 from the upper end can be brought into contact with each other. The Since all the adjacent rod members 21 are connected to each other by the leaf springs 22 of the mounting load, each adjacent rod member 21 is connected to each rod member 21.
The gaps between the collars 23 are urged in a direction to reduce the width, so that the outer peripheral surfaces of the collars 23a to 23c of the collar 23 are in contact with each other, and the fully closed state can be maintained with a predetermined gap d. In addition, the outer peripheral surface shape of each collar part 23a-23c does not need to be circular at this time, for example, a circular part is notched and a plane part is provided, and each collar part 23a-23c of each collar 23 is this plane part. They may be brought into contact with each other and stably held.

A metal (for example, aluminum) hook 2 is provided on the outer peripheral portion of the building 2 and below the window 3.
Two 5 are fixed to the left and right respectively. The hook 25 engages and fixes both ends of the rod 21a constituting the rod member 21 of any one of the rod members 21 at the lower end to the lower surface of the hook 25, and the rod member 21 at the lower end moves upward. Is restricted from moving to. The hook 25 may be formed of any shape and material as long as it has a predetermined strength. The hook 25 may be provided on the window frame of the window 3.

A control device (not shown) is disposed in the room of the building 2 and is connected to the electric motor 11 by wiring. The control device is turned on and off and the direction of rotation is switched by a switch provided in the room. When the forward or reverse switch is turned ON, the electric motor 1 is controlled by the control device.
1 is rotated forward or backward, and the blind 20 is wound or rewound by the winding drum 20. The control device also has a function of monitoring the current value of the operating electric motor 11 and stopping the operation when the current value exceeds a predetermined range. As a result, when the lower end of the blind 20 is engaged by the hook 25, the blind 20 is driven by the electric motor 11.
Even if the motor is wound upward and exceeds a predetermined tensile load, the operation of the electric motor 11 is surely stopped by the control device that monitors the drive current value of the electric motor 11 that rises according to the increased tensile load. Thus, there is no possibility that the blind 20 is damaged or the electric motor 11 is damaged.

Next, the operation of the blind 1 will be described. First, a description will be given of a case where the blind 20 is rewound from a state where it is wound around the winding drum 12 of the winding unit 10. When an unillustrated power supply is turned on to the blind 1 and the rewinding direction switch is turned on, the electric motor 11 rotates in a predetermined direction, and the winding drum 12 is unwound through the worm 27 and the worm wheel 28. Rotate in the direction that Thereby, the lower end of the blind 20 descends downward, eventually reaches the hook 25 and covers the window 3. At this time, if the switch is turned OFF, the electric motor 11
Will stop working. A brake force acts on the winding drum 12 due to the relationship between the worm 27 and the worm wheel 28 having a function as a reverse rotation prevention device, and
0 is stably stationary. And as mentioned above, each adjacent rod member 2 at this time
The outer peripheral surfaces of the collar portions 23a to 23c of the respective collars 23 provided between the rod members 21 are brought into contact with each other by a biasing force of the leaf springs 22 attached by the same attachment load. The gap d (2 mm in this embodiment) is maintained. That is, the adjacent rod members 21 are reliably maintained in a fully closed state so as to shield a predetermined amount of sunlight and blind the room.

Next, both ends of the rod member 21 at the lower end portion of the blind 20 are engaged with the two hooks 25 arranged on the lower outer peripheral portion of the window 3 below the blind 20 by driving of the electric motor 11. The case where the upper part is wound up will be described. In this case, since the lower end portion of the blind 20 is engaged and fixed to the hook 25, when the electric motor 11 is driven to wind up the upper portion of the blind 20, the hook 20, the winding drum 12, Tension begins to be applied between. When the electric motor 11 is further driven to wind up the upper part of the blind 20, the tension of the blind 20 increases and eventually exceeds the mounting load of the leaf spring 22 connecting the two adjacent rod members 21. The gap between the members 21 begins to widen (see FIG. 3). At this time, in the blind 20, the load of each leaf spring 22 stretched and connected between the adjacent rod members 21 is balanced with the tension generated by winding up the blind 20, and a predetermined amount of each leaf spring 22 is The attachment length, that is, the gap between the rod members 21 is extended. The amount of extension at this time differs from top to bottom for each leaf spring 22, and the top leaf spring 22 has a larger amount of extension and gradually decreases downward. That is, the gaps A to H between the rod members 21 shown in FIG. The reason why the extension amount of each leaf spring 22 is different for each leaf spring 22 in this way is because the weight of the blind 20 located below each leaf spring applied to each leaf spring 22 is different. . Each leaf spring 22 is a kind of leaf spring manufactured with the same specifications, and is attached between two adjacent rod members 21 with the same attachment load. Therefore, the load applied to each leaf spring 22 differs by the weight of the blind 20 disposed below each leaf spring 22, and the extension amount differs by the difference.

Then, the electric motor 11 may be finely operated to adjust the gap amount so that the desired light intensity and ventilation amount are obtained. At this time, if the electric motor 11 is stopped, the worm 27
A brake force is applied to the winding drum 12 by the self-locking function between the worm wheel 28 and the worm wheel 28 so that the blind 20 is stationary.

As apparent from the above, in the present embodiment, the plurality of rod members 21 are connected to each other by a leaf spring 22 that is an elastic member as a connecting member, and the rod member 21 at the lower end is connected to the hook 25.
It is restricted by this to move upward. At this time, the winding unit 10
Thus, by winding up the upper portion of the blind 20, the leaf spring 22 between the rod members 21 extends, and the gap between the rod members 21 increases, so that the amount of light collected and the amount of ventilation can be freely adjusted to a desired size.

Further, in the present embodiment, the weight of the blind 20 received by the pair of leaf springs 22 connected to the uppermost rod member 21 that supports the largest weight among the plurality of rod members 21 is more than a value obtained by dividing the weight into two equal parts. All the leaf springs 22 are attached by a large attachment load. As a result, all the adjacent rod members 21 are urged until the rod members 21 come into contact with each other to be equally spaced and have a good appearance. Moreover, since it can be comprised by one type of leaf | plate spring 22, it can respond at low cost.

Further, in the present embodiment, the collar 23 is provided with flanges 23a to 23c, and the outer periphery of the flanges 23a to 23c of the rod members 21 is brought into contact with each other, so that the rod members 21 are fully closed. Regulate the interval. By such a simple and low-cost method, the gap between the rod members 21 when the blind is fully closed can be unified, and the appearance can be improved.

Further, in the present embodiment, the elastic member includes a low-cost leaf spring 22 bent in a dogleg shape.
Has been applied. The leaf spring 22 can be easily fixed by winding the hook portions 22a at both ends around the cylindrical portion 23d or 23e of the collar 23, and each rod member 21 having a small mounting space.
Can be easily installed in between.

Furthermore, in the present embodiment, since the shank 20 is wound up by the electric motor 11, the winding amount can be finely adjusted, whereby the gap between the rod members 21 can be freely adjusted. Further, since the reverse rotation preventing device 14 is provided in the winding portion, even if the electric motor 11 is stopped and the winding portion 10 receives a biasing force opposite to the winding direction by the leaf spring 22 of the blind 20, And it can fix reliably.

Next, a second embodiment will be described with reference to FIGS. In the first embodiment, two adjacent rod members 21 of the blind 20 are connected by one type of leaf spring 22.
However, in the second embodiment, two adjacent rod members 21 are connected by different types of leaf springs 52a to 52i. Leaf spring 52a (upper end) to 52i (lower end)
Are attached between each two adjacent rod members 21 in pairs, i.e., two.
Other than the above, the second embodiment is the same as the first embodiment, so the description of the same parts is omitted and only the different parts are described.

In the second embodiment, similar to the first embodiment, the leaf springs 52a to 52i have the tension generated when the blind 20 is pulled upward by the drive of the electric motor 11, and the leaf springs 52a to 52i.
The weight of the blind 20 located below 2i is applied. Therefore, each leaf spring 52a-5.
The attachment load 2i is set so that the attachment load is smaller for each leaf spring disposed below, taking into account the weight below the leaf springs 52a to 52i. That is, the attachment loads of the leaf springs 52a to 52i are the rod members 21 positioned below the upper rod members 21 of the two adjacent rod members 21 on which the leaf springs 52a to 52i are stretched, and The total weight of the leaf springs 52a to 52i is set to a value larger than a value obtained by dividing the weight into two equal parts. Therefore, each leaf spring 5
The mounting loads on the rod members 21 of 2a to 52i are gradually reduced from the upper side to the lower side at substantially equal intervals, and the difference in the mounting load between the rod members 21 adjacent in the vertical direction is one rod member. 21 and a value obtained by dividing the total weight of the two leaf springs (any one of the leaf springs 52 a to 52 i) engaged with the rod member 21 into two equal parts.

Accordingly, when the upper portion of the blind 20 is rolled up with the rod member 21 at the lower end of the blind 20 engaged with the hook 25, each leaf spring 52a that connects the adjacent rod members 21 together.
˜52i is balanced with the generated tension, and the attachment length is extended by a predetermined amount. And since the specification of each leaf | plate spring 52a-52i is each set based on the magnitude | size of the load which each leaf | plate spring 52a-52i receives, even if the stress applied above and below the shank 20 differs, FIG. The gaps A to H between the adjacent rod members 21 shown in FIG.

In the above embodiment, the leaf spring 22 is used as an elastic member for connecting the rods 21 to each other.
However, the present invention is not limited to this. For example, a tension coil spring may be applied. It is only necessary to extend the axial portion of each rod member 21 outward from both ends, and to hook the hook portion of the tension coil spring to the extended portion. As a result, the gap between adjacent rods can be biased in the direction of decreasing, and the same effect as in the above embodiment can be obtained.

Moreover, in the said embodiment, the self-locking mechanism of a worm | worm and a worm wheel was utilized as a reverse rotation prevention apparatus of the winding drum 12 which winds up the shank 20. However, the present invention is not limited to this, and a spring coupler type reverse rotation prevention device using expansion and contraction of the outer periphery of the coil spring disclosed in JP-A-2006-125186 may be provided.

Moreover, in the said embodiment, the hook 25 for engaging with the lower end part of the blind 20 is 2
Although only one hook is provided, only one hook that engages with the central portion in the axial direction of the rod member 21 may be provided. Three or more hooks 25 may be provided.

Furthermore, in the said embodiment, although the electric motor 11 was applied to the winding part 10 which winds up the tin 20 and it was set as the electric tinting device, you may use a manual hoisting device. In this case, a handwheel handle may be rotationally connected to the drum rotation shaft 12 a of the drum 12 via the worm 27 and the worm wheel 28. This also provides the same effect as the above embodiment.

DESCRIPTION OF SYMBOLS 1 ... Sanding device, 2 ... Building, 3 ... Window, 10 ... Winding part, 11 ... Electric motor, 12 ... Winding drum, 14 ... Reverse rotation prevention device , 20 ... blind, 21
... Rod members, 22 ... Leaf springs, 23 ... Collar, 27 ... Worm, 28
..Worm wheels, 52a to 52i ... leaf springs.

Claims (6)

A blind in which a plurality of rod members formed in a long shape are connected by a connecting member;
A winding device including a winding unit for winding the blind;
A pair of elastic members stretched around both ends of two adjacent rod members and elastically approach the two rod members are adjacent to each other 2 of the plurality of rod members.
It is constructed by sequentially stretching between the rod members,
A blind device comprising a hook that engages with a rod member at a lower end portion of the blind to restrict upward movement of the rod member at the lower end portion. In Claim 1, the attachment load to the two adjacent rod members of the said elastic member is the weight of one said rod member, and two pieces of weight from the total weight of these several rod members and these several elastic members. A blind device characterized in that it is larger than a value obtained by dividing a value obtained by subtracting the total weight of the elastic member into two equal parts. 2. The rod according to claim 1, wherein each of the elastic members is attached to the two adjacent rod members at a load lower than the upper rod member of the two adjacent rod members on which the respective elastic members are stretched. A blind apparatus characterized in that the total weight of the member and the elastic member is larger than a value obtained by dividing the total weight into two equal parts. In any 1 paragraph of Claims 1 thru / or 3, The above-mentioned rod member is constituted by a rod and the collar fitted on both ends of the rod,
The collar has three collar parts and two cylindrical parts defined by the three collar parts,
One of the two cylindrical portions of the collar is connected to the cylindrical portion of the collar positioned above the collar by the elastic member, and the other cylindrical portion is connected to the collar positioned below the collar. A blind device characterized in that it is connected to a cylindrical portion by the elastic member. 5. The blind device according to claim 4 , wherein the elastic member is a leaf spring that is bent in a dogleg shape and hook portions at both ends are wound in a roll shape and wound around the cylindrical portion of the collar. 6. The winding unit according to claim 1, wherein the winding unit includes an electric motor, a winding drum that is rotationally driven by the electric motor, and a reverse rotation prevention device that prevents reverse rotation of the winding drum. A blind device characterized by comprising:

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