JP7601702B2 - Roller blinds - Google Patents

Description

The present invention relates to a roller blind.

In a roll screen used as a shielding device, the screen is wound around a winding pipe whose ends are supported by a pair of brackets, and the screen is raised and lowered manually or electrically. During construction, one end of the winding pipe is attached to one bracket, and then the other end is attached to the other bracket. For example, in Patent Document 1, the winding pipe is inserted into a catch cover serving as a moving member, and the catch cover is then moved to the bearing portion of the bracket and attached, preventing the shaft of the winding pipe from coming off the bearing portion.

Patent No. 3593318

In the case of roller screens such as those described above, the winding pipe is attached to a pair of brackets during installation and maintenance. During the installation process, it is desirable for the installer to be able to recognize whether the winding pipe has been correctly attached to the brackets.

The roll screen for solving the above problem comprises a winding pipe for winding up the screen, and a bracket with a bearing recess for supporting the shaft of the winding pipe, the shaft has an engagement portion recessed in a direction intersecting the rotation axis of the winding pipe, the bearing recess has a wall portion constituting the bearing recess, the wall portion has an insertion hole into which a fixing pin for fixing the shaft to the bearing recess is inserted, the bearing recess has a restricting portion that changes from a first state that restricts the entry of the fixing pin from the insertion hole to a second state that allows the entry of the fixing pin, and the restricting portion allows the fixing pin to engage with the engaging portion in the second state.

In the above-mentioned roller screen, the engagement portion may be a through hole, and the wall portion may be configured to have a further insertion hole at a position opposite to the insertion hole, into which the tip of the fixing pin that has been inserted through the engagement portion is engaged.

In the above-mentioned roller screen, the regulating portion may be a leaf spring that is biased in a direction away from the bottom portion surrounded by the wall portion, and the leaf spring may be configured to block the entry path of the fixing pin from the insertion hole in the first state, and to be displaced to the second state by being pushed by the shaft portion, allowing the fixing pin inserted through the insertion hole to engage with the engagement.

In the above-mentioned roller screen, the regulating portion includes a regulating member arranged in the space surrounded by the wall portion so as to be movable in a direction approaching or moving away from the bottom portion surrounded by the wall portion, and a biasing means for biasing the regulating member in a direction toward a first state in which the regulating member is moved away from the bottom portion, and the regulating member may be configured to include a regulating hole that overlaps with the insertion hole and enables the fixing pin to engage with the engagement portion in the second state in which the regulating member is pressed against the shaft portion.

In the above-mentioned roller screen, the biasing means may be a coil spring.
In the above-mentioned roller screen, the biasing means may include a first magnet arranged at the bottom and a second magnet arranged at the portion of the regulating member opposite the bottom, and the first magnet and the second magnet may be arranged so that the same magnetic poles face each other.

In the above-mentioned roller screen, the regulating portion is a regulating member arranged along the wall portion so as to be movable in a direction approaching or moving away from the bottom portion surrounded by the wall portion, the regulating member being positioned in the first state away from the bottom portion by its own weight, and being pushed by the shaft portion to move to the second state approaching the bottom portion, and the regulating member may be configured to have a regulating hole that overlaps with the insertion hole in the second state to enable the fixing pin to engage with the engagement portion.

This invention makes it possible to prevent installation defects when attaching the winding pipe to the bracket.

FIG. FIG. 4 is a perspective view of a motor-side bracket in the first embodiment. 10 is a cross-sectional view showing a process of mounting the motor-side bracket in the first embodiment, illustrating a state before the shaft portion engages with the engagement portion. FIG. 10 is a cross-sectional view showing a process of mounting the motor-side bracket in the first embodiment, illustrating a state in which the shaft portion is properly engaged with the engagement portion. FIG. 10 is a cross-sectional view showing a process of mounting the motor-side bracket in the first embodiment, in which the shaft portion is properly engaged with the engaging portion and the fixing pin is inserted. FIG. 13 is a cross-sectional view showing a state in which the shaft portion is not properly engaged with the engaging portion in the first embodiment. FIG. FIG. 11 is a cross-sectional view showing a state before the shaft portion is engaged with the engagement portion in a second embodiment using a coil spring. 13 is a cross-sectional view showing a state in which the shaft portion is properly engaged with the engaging portion and the fixing pin is inserted in the second embodiment. FIG. FIG. 11 is a cross-sectional view showing a state before a shaft portion is engaged with an engagement portion in a third embodiment using a magnet. 13 is a cross-sectional view showing a state in which the shaft portion is properly engaged with the engaging portion and the fixing pin is inserted in the third embodiment. FIG. FIG. 13 is a cross-sectional view showing a state before the shaft portion is engaged with the engagement portion in the fourth embodiment in which the wall portion is inclined. 13 is a cross-sectional view showing a state in which the shaft portion is properly engaged with the engaging portion and the fixing pin is inserted in the fourth embodiment. FIG.

First Embodiment
[Overall structure]
As shown in Fig. 1, the roller blind 1 is, for example, attached to a window frame and used as a shading device for blocking sunlight and the like, and is also used as a shading device for separating a first space and a second space, such as a room and a staircase, and blocking air flow and the like. The roller blind 1 is attached to an installation part provided on a window frame or a ceiling. The roller blind 1 is driven and controlled by a control unit 2. The control unit 2 is, for example, installed on a wall surface near the roller blind 1, and is electrically connected to each part of the roller blind 1 by electrical wiring 3 and 4.

The roller blind 1 includes a head portion 11 that is attached to the installation portion, and a screen 12 that serves as a shielding material that hangs down from the head portion 11. The head portion 11 includes side brackets 13 and 14 at both ends in the width direction. The head portion 11 is attached to the installation portion by the side brackets 13 and 14. The side brackets 13 and 14 rotatably support a winding pipe 15 that serves as a winding shaft for winding the screen 12. The winding pipe 15 extends in the width direction of the head portion 11 and includes a first end 16 and a second end 17. The winding pipe 15 includes a motor 18 for rotating the winding pipe 15 inside the first end 16. The side bracket 13 is a motor-side bracket that serves as a first bracket that supports the first end 16 of the winding pipe 15. The side bracket 14 is a bearing-side bracket that serves as a second bracket that supports the second end 17 on the opposite side to the first end 16. Hereinafter, the side bracket 13 will also be referred to as the motor side bracket 13, and the side bracket 14 will also be referred to as the bearing side bracket 14.

The motor 18 has a cylindrical shape and has two opposing faces. From the face of the motor 18 located on the central side of the winding pipe 15, a motor shaft 18a extends as an output shaft toward the central part of the winding pipe 15. The motor shaft 18a is connected to a motor adapter 18b. The motor adapter 18b is screwed to the winding pipe 15. The driving force of the motor 18 is transmitted to the winding pipe 15 via the motor shaft 18a and the motor adapter 18b, causing the winding pipe 15 to rotate. The motor 18 also has a face 18c on the opposite side to the central part, which faces the end face of the first end 16. The face 18c of the motor 18 has a first shaft portion 19 protruding from the face 18c.

The first shaft portion 19 is a square shaft such as a rectangular prism, and has a hole portion 19a as an engagement portion recessed in a direction intersecting the rotation axis. Here, the hole portion 19a penetrates between the opposing surfaces. The first shaft portion 19 is attached to and supported by the motor side bracket 13. The winding pipe 15 also has a second shaft portion 20 at the second end portion 17, which is coaxial with the first shaft portion 19. The second shaft portion 20 has a base end portion 20a of a substantially cylindrical shape protruding from the end face of the second end portion 17, and a tip portion 20b protruding from the tip of the base end portion 20a. The tip portion 20b has a cylindrical shape with a smaller diameter on the base end portion 20a side than the base end portion 20a side. The tip portion 20b has a groove portion that engages with the bearing side bracket 14 in the circumferential direction. The tip portion 20b is supported by the bearing side bracket 14 in a rotatable state by engaging the groove portion with the bearing side bracket 14.

[Motor side bracket]
As shown in Fig. 2, the motor-side bracket 13 includes an attachment piece 21 for fixing to a ceiling surface, and a support piece 22 for supporting the first shaft portion 19. A support plate 23 is fixed to the support piece 22 by a fixing member 23a such as a rivet. The support plate 23 includes first wall portions 24a, 24b extending in a first direction (front-rear direction) and parallel to each other, and second wall portions 25a, 25b extending in a second direction (up-down direction) perpendicular to the first direction. The first wall portion 24a is located on the lower side, and the first wall portion 24b is located on the upper side. The second wall portion 25a is located in the front, and the second wall portion 25b is located in the rear.

The space surrounded by the first walls 24a, 24b and the second walls 25a, 25b is a rectangular recess that constitutes the bearing recess 26 with which the first shaft 19 engages. The bearing recess 26 has a surface that is flush with the surface of the support plate 23 that constitutes the bottom 26a.

The pair of first wall portions 24a, 24b constituting the bearing recess 26 are provided with insertion holes 27a, 27b. The insertion holes 27a, 27b are provided at positions facing each other, with the first wall portion 24a having the insertion hole 27a and the first wall portion 24b having the insertion hole 27b. The insertion holes 27a, 27b may be circular, but here they are configured as elongated holes with the height direction of the first wall portions 24a, 24b as their major axis. When the first shaft portion 19 is engaged with the bearing recess 26, the insertion holes 27a, 27b are aligned with the hole portion 19a, allowing the fixing pin 29 to be inserted. A protrusion 28 is provided below the first wall portion 24a located on the lower side and near the insertion hole 27a. The protrusion 28 engages the fixing pin 29 that has reached its normal position.

The fixing pin 29 is a component that is attached to the motor side bracket 13. The fixing pin 29 is configured by bending a single linear member into a generally hairpin shape. Specifically, the fixing pin 29 has an insertion shaft portion 29a and a locking portion 29b. The insertion shaft portion 29a is configured to be U-shaped. The locking portion 29b has a cut portion where the series of linear members is interrupted, and is configured to allow the protrusion 28 to enter inside the ring shape.

When the first shaft portion 19 is engaged with the bearing recess 26, the insertion shaft portion 29a is inserted from the insertion hole 27a in the lower first wall portion 24a, passes through the hole portion 19a, and extends from the insertion hole 27b in the upper first wall portion 24b. In this state, the locking portion 29b is inserted into the annular shape with the protrusion inserted through the cut portion and locked by the protrusion 28.

As shown in FIG. 3, the bearing recess 26 with which the first shaft portion 19 is engaged is provided with a restricting portion 31 that restricts the entry of the fixing pin 29 into the bearing recess 26. The restricting portion 31 is provided with a leaf spring 32. The leaf spring 32 is formed by bending a rectangular metal sheet, and includes a fixed piece 32a and a restricting piece 32b extending from the fixed piece 32a. The restricting piece 32b is bent with respect to the fixed piece 32a. The fixed piece 32a is disposed between the support piece 22 and the support plate 23, and is fixed by the fixing member 23a. The restricting piece 32b faces the bottom 26a of the bearing recess 26 and rises obliquely from the bottom 26a. That is, the restricting piece 32b starts from the base end of the upper first wall portion 24b, and the side of the lower first wall portion 24a is separated from the bottom 26a of the bearing recess 26. The restricting piece 32b that rises up inside the bearing recess 26 blocks the path from the insertion hole 27a of the first wall portion 24a to the insertion hole 27b of the first wall portion 24b. The restricting piece 32b is positioned so that the open portion between it and the bottom portion 26a faces the lower insertion hole 27a.

[Procedure for installing the take-up pipe]
Next, a procedure for attaching the take-up pipe 15 to the motor side bracket 13 and the bearing side bracket 14 will be described.

First, the motor side bracket 13 and the bearing side bracket 14 are screwed to an installation portion such as a ceiling surface with a gap corresponding to the width of the winding pipe 15. Next, as shown in FIG. 4, the first shaft portion 19 protruding from one surface 18c of the motor 18 is inserted into the bearing recess 26 of the motor side bracket 13.

As shown in FIG. 4, the first shaft portion 19 of the winding pipe 15 is inserted into the bearing recess 26. When the first shaft portion 19 is inserted into the bearing recess 26 in the correct position, the restricting piece 32b, which is in a state where it is raised diagonally relative to the bottom portion 26a in the bearing recess 26 (first state), is pushed by the tip of the first shaft portion 19 and moves to a state where it is close to the bottom portion 26a (second state). As a result, the hole portion 19a of the first shaft portion 19 and the insertion holes 27a, 27b provided above and below the bearing recess 26 completely overlap. Then, the entry path of the insertion shaft portion 29a in the fixing pin 29 is opened, allowing the insertion shaft portion 29a to enter the hole portion 19a.

Next, as shown in FIG. 5, the fixing pin 29 is inserted from below the motor side bracket 13 into the lower insertion hole 27a, the hole 19a, and the upper insertion hole 27b of the bearing recess 26, in that order. At this time, the locking portion 29b of the fixing pin 29 is engaged with the protrusion 28. This causes the winding pipe 15 to be fixed in the correct position relative to the motor side bracket 13.

On the other hand, as shown in FIG. 6, when the first shaft portion 19 is not properly inserted into the bearing recess 26, the hole portion 19a does not completely overlap with the through holes 27a and 27b provided above and below the bearing recess 26. Then, the entry path of the insertion shaft portion 29a of the fixing pin 29 is blocked by the restricting piece 32b in a state in which it is raised obliquely with respect to the bottom portion 26a (first state). Then, the fixing pin 29 inserted from the lower through hole 27a of the bearing recess 26 cannot be inserted all the way because the insertion shaft portion 29a hits the back surface of the restricting piece 32b. As a result, the locking portion 29b cannot engage with the protrusion 28. This allows the operator to know that the first shaft portion 19 is not properly inserted into the bearing recess 26 because the fixing pin 29 is not inserted into the bearing recess 26. The restricting piece 32b is arranged so that the open portion between the bottom portion 26a faces the lower through hole 27a. Therefore, the insertion shaft 29a will not overcome the restricting piece 32b and advance toward the insertion hole 27b.

Once the first shaft portion 19 is properly attached to the motor side bracket 13, the second end portion 17 is then attached to the bearing side bracket 14. Alternatively, the second end portion 17 can be attached to the bearing side bracket 14 before the fixing pin 29 is inserted into the insertion hole 27a. In other words, the fixing pin 29 can be inserted into the insertion hole 27a at the end of the installation process of the winding pipe 15.

The roller blind 1 configured as above can provide the following effects.
(1-1) If the first shaft portion 19 is not properly inserted into the bearing recess 26, the restricting portion 31 will remain in a state (first state) in which it is raised at an angle relative to the bottom portion 26a. This will result in the fixing pin 29's entry path being blocked within the bearing recess 26, making it impossible to insert it all the way. As a result, the worker can tell that the first shaft portion 19 is not properly inserted into the bearing recess 26 by the fact that the fixing pin 29 is not inserted into the bearing recess 26.

(1-2) The hole 19a of the first shaft 19 is a through hole, so that the insertion shaft 29a of the fixing pin 29 passes through the hole 19a and engages with the insertion hole 27b provided in the upper first wall 24b. This makes it possible to reliably fix the first shaft 19 to the bearing recess 26 so that it cannot rotate.

(1-3) The restricting piece 32b can block the entry path of the fixing pin 29 when it is in a state (first state) where it is raised obliquely relative to the bottom 26a. In addition, the restricting piece 32b can be easily displaced from the first state to a state (second state) where it is close to the bottom 26a and the entry path is open, by being pressed by the first shaft portion 19.

The first embodiment can be further modified as follows.
The hole 19a serving as the engagement portion of the first shaft portion 19 may be configured as a bottomed recess instead of a through hole. This is because even with such a configuration, the insertion shaft portion 29a of the fixing pin 29 inserted through the insertion hole 27a can engage with the bottomed recess. When such a configuration is adopted, the insertion hole 27b may be omitted in the upper first wall portion 24b.

The leaf spring 32 constituting the restricting portion 31 may be made of resin molding, rather than a rectangular metal plate. The leaf spring 32 may also be fixed to the support piece 22 by a fixing means such as adhesive or double-sided tape.

Second Embodiment
As shown in Fig. 7, the restricting portion of the second embodiment has a restricting member 41 disposed in the bearing recess 26. Specifically, the restricting member 41 is disposed in the bearing recess 26 so as to be movable in the axial direction of the winding pipe 15. That is, the restricting member 41 is disposed so as to approach and move away from the bottom 26a. The tip portions of the first wall portions 24a, 24b are bent inward to form anti-falling protrusions 47. The anti-falling protrusions 47 make it difficult for the restricting member 41, which moves in the axial direction of the winding pipe 15, to fall off the bearing recess 26. The inside of the anti-falling protrusions 47 forms an open end into which the first shaft portion 19 can be inserted.

The restricting member 41 comprises a bottom wall 42 and a peripheral wall 43 erected around the bottom wall 42, and defines a recess 44, which is a rectangular bottomed depression, on the inside of the peripheral wall 43. The first shaft portion 19 engages with the recess 44. The peripheral wall 43 is provided with a restricting hole 45 that overlaps with the insertion holes 27a, 27b and the hole portion 19a when the first shaft portion 19 engages with the recess 44. That is, the peripheral wall 43 is provided with a pair of restricting holes 45 facing each other.

A coil spring 46 is disposed between the bottom 26a of the bearing recess 26 and the bottom wall 42 of the restricting member 41 as a biasing means. The coil spring 46 biases the restricting member 41 in a direction away from the bottom 26a, i.e., in the opposite direction to the insertion direction of the first shaft portion 19. The restricting member 41 is engaged by the fall-off prevention protrusion 47, so that the biasing force of the coil spring 46 will not cause it to fall off from the bearing recess 26.

Next, the operation of the restricting portion of the second embodiment will be described.
Before the first shaft portion 19 is engaged, the restricting member 41 is biased by the biasing force of the coil spring 46 so that the bottom wall 42 of the restricting member 41 is separated from the bottom 26a of the bearing recess 26. At this time, the insertion holes 27a, 27b and the restricting hole 45 are not overlapped and are not communicated with each other. In this state (first state), even if the fixing pin 29 is inserted from the insertion hole 27a, it hits the peripheral wall 43 of the restricting member 41 that blocks the insertion hole 27a and cannot be inserted. Also, when the first shaft portion 19 is not properly inserted into the recess 44 of the restricting member 41 and the restricting member 41 is not firmly pressed toward the bottom 26a, the insertion hole 27a and the restricting hole 45 do not completely overlap, and the fixing pin 29 cannot be inserted. This allows the operator to know that the first shaft portion 19 is not properly inserted into the bearing recess 26 because the fixing pin 29 is not inserted into the bearing recess 26.

As shown in FIG. 8, when the first shaft portion 19 is inserted into the bearing recess 26 in the correct state, the restricting member 41 in the bearing recess 26 moves in a direction in which the bottom wall 42 approaches the bottom portion 26a against the biasing force of the coil spring 46. Then, the bottom wall 42 and the bottom portion 26a are in close proximity (second state), and the insertion holes 27a, 27b and the restricting hole 45 completely overlap. Then, the entry path of the insertion shaft portion 29a in the fixing pin 29 is opened, allowing it to enter the hole portion 19a. The operator needs to engage the first shaft portion 19 with the recess 44 with a force that exceeds the biasing force of the coil spring 46.

Then, the fixing pin 29 is inserted from below the motor side bracket 13 into the lower insertion hole 27a of the bearing recess 26, the lower restriction hole 45, the hole 19a, the upper restriction hole 45, and the upper insertion hole 27b, in that order. Then, the locking portion 29b of the fixing pin 29 is engaged with the protrusion 28. This causes the winding pipe 15 to be fixed in the correct position relative to the motor side bracket 13.

Once the first shaft portion 19 is properly attached to the motor side bracket 13, the second end portion 17 is then attached to the bearing side bracket 14. Alternatively, the second end portion 17 can be attached to the bearing side bracket 14 before the fixing pin 29 is inserted into the insertion hole 27a. In other words, the fixing pin 29 can be inserted into the insertion hole 27a at the end of the installation process of the winding pipe 15.

The restricting portion of the second embodiment configured as above can obtain the following effects.
(2-1) If the first shaft portion 19 is not properly inserted into the bearing recess 26, the regulating member 41 will remain spaced apart from the bottom portion 26a. Or, the first shaft portion 19 will be pushed back by the biasing force of the coil spring 46. Then, the entrance path of the fixing pin 29 will be blocked in the bearing recess 26, and the fixing pin 29 will not be able to be inserted all the way. As a result, the worker can know that the first shaft portion 19 is not properly inserted into the bearing recess 26 because the fixing pin 29 is not inserted into the bearing recess 26. Also, the fixing pin 29 cannot be inserted unless the first shaft portion 19 is firmly pressed against the bearing recess 26. This allows the worker to perform the installation work of the first shaft portion 19 with the utmost care.

(2-2) The restricting portion is simply configured by the restricting member 41 and the coil spring 46 .
Third Embodiment
As shown in FIG. 9, the restricting portion of the third embodiment is a modified example of the second embodiment, in which a first magnet 48 and a second magnet 49 are used as the biasing means instead of the coil spring 46 .

That is, a first magnet 48 is disposed on the bottom 26a of the bearing recess 26. A second magnet 49 is disposed on the bottom wall 42 of the regulating member 41, which is the opposing portion to the bottom 26a. When the surface of the first magnet 48 facing the second magnet 49 is an N pole, the surface of the second magnet 49 facing the first magnet 48 is also an N pole. When the surface of the first magnet 48 facing the second magnet 49 is an S pole, the surface of the second magnet 49 facing the first magnet 48 is also an S pole. That is, the first magnet 48 and the second magnet 49 are disposed so that the same poles face each other and repel each other. As a result, even if the regulating member 41 does not have a coil spring 46, the repulsive force of the first magnet 48 and the second magnet 49 urges the regulating member 41 in a direction away from the bottom 26a, that is, in the opposite direction to the insertion direction of the first shaft portion 19. The restricting member 41 is locked by the anti-fall protrusion 47, so that it will not fall off from the bearing recess 26 due to the repulsive force of the first magnet 48 and the second magnet 49.

The first magnet 48 is fixed to the bottom 26a with adhesive, double-sided tape, or other fixing means, and the second magnet 49 is fixed to the bottom wall 42 with adhesive, double-sided tape, or other fixing means.

Next, the operation of the restricting portion of the third embodiment will be described.
Before the first shaft portion 19 is engaged, the restricting member 41 is biased by the repulsive force of the first magnet 48 and the second magnet 49 so that the bottom wall 42 of the restricting member 41 is separated from the bottom 26a of the bearing recess 26. At this time, the insertion holes 27a, 27b and the restricting hole 45 are not overlapped and are not connected. In this state (first state), even if an attempt is made to insert the fixing pin 29 through the insertion hole 27a, it hits the peripheral wall 43 of the restricting member 41 that blocks the insertion hole 27a and cannot be inserted. Also, when the first shaft portion 19 is not properly inserted into the recess 44 of the restricting member 41 and the restricting member 41 is not firmly pressed toward the bottom 26a, the insertion hole 27a and the restricting hole 45 do not completely overlap, and the fixing pin 29 cannot be inserted. This allows the worker to know that the fixing pin 29 is not inserted into the bearing recess 26 and therefore the first shaft portion 19 is not properly inserted into the bearing recess 26 .

As shown in FIG. 10, when the first shaft portion 19 is inserted into the bearing recess 26 in the correct state, the restricting member 41 in the bearing recess 26 moves in a direction in which the bottom wall 42 approaches the bottom portion 26a against the repulsive force of the first magnet 48 and the second magnet 49. Then, the bottom wall 42 and the bottom portion 26a are in close proximity (second state), and the insertion holes 27a, 27b and the restricting hole 45 completely overlap. Then, the entry path of the insertion shaft portion 29a in the fixing pin 29 is opened, allowing the insertion shaft portion 29a to enter the hole portion 19a. The operator needs to engage the first shaft portion 19 with the recess 44 with a force that exceeds the repulsive force of the first magnet 48 and the second magnet 49.

Then, the fixing pin 29 is inserted from below the motor side bracket 13 into the lower insertion hole 27a of the bearing recess 26, the lower restriction hole 45, the hole 19a, the upper restriction hole 45, and the upper insertion hole 27b, in that order. At this time, the locking portion 29b of the fixing pin 29 is engaged with the protrusion 28. This causes the winding pipe 15 to be fixed in the correct position relative to the motor side bracket 13.

Once the first shaft portion 19 is properly attached to the motor side bracket 13, the second end portion 17 is then attached to the bearing side bracket 14. Alternatively, the second end portion 17 can be attached to the bearing side bracket 14 before the fixing pin 29 is inserted into the insertion hole 27a. In other words, the fixing pin 29 can be inserted into the insertion hole 27a at the end of the installation process of the winding pipe 15.

The restricting portion of the third embodiment configured as above can obtain the effects listed below.
(3-1) If the first shaft portion 19 is not properly inserted into the bearing recess 26, the regulating member 41 will remain spaced apart from the bottom portion 26a. Or, the first shaft portion 19 will be pushed back by the repulsive force of the magnets 48, 49. Then, the entrance path of the fixing pin 29 will be blocked in the bearing recess 26, and the fixing pin 29 will not be able to be inserted all the way. As a result, the worker can know that the first shaft portion 19 is not properly inserted into the bearing recess 26 because the fixing pin 29 is not inserted into the bearing recess 26. Also, the fixing pin 29 cannot be inserted unless the first shaft portion 19 is firmly pressed against the bearing recess 26. This allows the worker to perform the installation work of the first shaft portion 19 with the utmost care.

(3-2) The restricting portion is simple in structure, being composed only of the restricting member 41 and the magnets 48 and 49. In addition, since it does not have any moving parts such as the coil spring 46, it is less likely to break down.

Fourth Embodiment
As shown in FIG. 11, the restricting portion of the third embodiment differs from the second and third embodiments in the configuration of the restricting member 51 disposed in the bearing recess 26 and does not include a biasing means.

That is, as shown in FIG. 11, the regulating member 51 is disposed within the bearing recess 26 so as to be movable in the direction of the rotation axis of the winding pipe 15. The bearing recess 26 has first walls 24c, 24d that are parallel to each other and extend in a first direction (front-rear direction), and second walls 25a, 25b that are parallel to each other and extend in a second direction (up-down direction) perpendicular to the first direction. In the fourth embodiment, the configuration of the first walls 24c, 24d is different from that of the first embodiment.

The first wall portion 24c located on the lower side is an inclined wall that slopes downward from the base end to the tip, and the first wall portion 24d located on the upper side is an inclined wall that slopes upward from the base end to the tip. The tips of the first wall portions 24c and 24d are bent inward to form anti-fall-out protrusions 47a. The anti-fall-out protrusions 47a make it difficult for the regulating member 51, which moves in the direction of the rotation axis of the winding pipe 15, to fall out of the bearing recess 26.

The pair of first wall portions 24c, 24d have insertion holes 27a, 27b with the same central axis. The first wall portion 24c has an insertion hole 27a, and the first wall portion 24d has an insertion hole 27b. When the first shaft portion 19 is engaged with the bearing recess 26, the insertion holes 27a, 27b overlap with the hole portion 19a, allowing the fixing pin 29 to be inserted.

The regulating member 51 is disposed in the bearing recess 26. Specifically, the regulating member 51 is disposed in the bearing recess 26 so as to be movable in the direction of the rotation axis of the winding pipe 15. The regulating member 51 has a bottom wall 52 and a guide wall 53 erected against the bottom wall 52, and has an L-shaped cross section. The guide wall 53 moves along the inner surface of the lower first wall portion 24c. That is, the regulating member 51 descends by its own weight along the lower first wall portion 24c until it hits the fall prevention protrusion 47a. The inner surface of the first wall portion 24c and the outer surface of the guide wall 53 facing each other are preferably smooth surfaces with low friction so that the guide wall 53 can slide easily against the first wall portion 24c. The guide wall 53 has a restriction hole 54 that overlaps with the insertion holes 27a, 27b and the hole 19a when the first shaft portion 19 is inserted into the bearing recess 26 and the bottom wall 52 is pressed.

Next, the operation of the restricting portion of the fourth embodiment will be described.
Before the first shaft portion 19 is engaged, the regulating member 51 moves under its own weight so that the bottom wall 42 of the regulating member 41 is separated from the bottom 26a of the bearing recess 26. At this time, the lower insertion hole 27a and the regulating hole 45 are not completely overlapped and do not communicate with each other. In this state (first state), even if the fixing pin 29 is inserted through the insertion hole 27a, it hits the guide wall 53 of the regulating member 51 that blocks the insertion hole 27a and cannot be inserted. Also, when the first shaft portion 19 is not properly inserted into the bearing recess 26 and the regulating member 51 is not firmly pressed toward the bottom 26a, the insertion hole 27a and the regulating hole 45 do not completely overlap, and the fixing pin 29 cannot be inserted. This allows the operator to know that the first shaft portion 19 is not properly inserted into the bearing recess 26 because the fixing pin 29 is not inserted into the bearing recess 26.

As shown in FIG. 12, when the first shaft portion 19 is correctly inserted into the bearing recess 26, the restricting member 51 in the bearing recess 26 is pressed by the first shaft portion 19, causing the bottom wall 42 to move closer to the bottom portion 26a. Then, the bottom wall 52 and the bottom portion 26a are brought into close proximity (second state), and the insertion holes 27a, 27b and the restricting hole 45 completely overlap. Then, the entry path for the insertion shaft portion 29a in the fixing pin 29 is opened, allowing the insertion shaft portion 29a to enter the hole portion 19a.

Then, the fixing pin 29 is inserted from below the motor side bracket 13 into the lower insertion hole 27a of the bearing recess 26, the restriction hole 54, the hole 19a, and the upper insertion hole 27b, in that order. Then, the locking portion 29b of the fixing pin 29 is engaged with the protrusion 28. This causes the winding pipe 15 to be fixed in the correct position relative to the motor side bracket 13.

Once the first shaft portion 19 is properly attached to the motor side bracket 13, the second end portion 17 is then attached to the bearing side bracket 14. Alternatively, the second end portion 17 can be attached to the bearing side bracket 14 before the fixing pin 29 is inserted into the insertion hole 27a. In other words, the fixing pin 29 can be inserted into the insertion hole 27a at the end of the installation process of the winding pipe 15.

The restricting portion of the fourth embodiment configured as above can obtain the effects listed below.
(4-1) If the first shaft portion 19 is not properly inserted into the bearing recess 26, the restricting member 51 will remain spaced apart from the bottom portion 26a. This will result in the fixing pin 29's entry path being blocked within the bearing recess 26, making it impossible to insert the fixing pin 29 all the way through. As a result, the worker will be able to tell that the first shaft portion 19 is not properly inserted into the bearing recess 26 by the fact that the fixing pin 29 is not properly inserted into the bearing recess 26.

(4-2) The restricting portion does not require the coil spring 46 as in the second embodiment or the magnets 48, 49 as in the third embodiment, and the configuration can be simplified while reducing the number of parts.
The fourth embodiment can be further modified as follows.

The restricting member 51 may be provided with a peripheral wall 43 like the restricting member 41 and a pair of restricting holes 54 .
The restricting portion of the fourth embodiment may be configured to include the coil spring 46 of the second embodiment or the magnets 48, 49 of the third embodiment.

1...Roller screen 13...Side bracket (motor side bracket)
Reference Signs List 15: Winding pipe 18: Motor 18a: Motor shaft 18b: Motor adapter 19: First shaft portion 19a: Hole portion 24a: First wall portion 24b: First wall portion 25a: Second wall portion 25b: Second wall portion 26: Bearing recess 26a: Bottom portion 27a: Through hole 27b: Through hole 29: Fixing pin 31: Restricting portion 32: Leaf spring 32a: Fixing piece 32b: Restricting piece

Claims (7)

A winding pipe for winding up the screen;
a bracket having a bearing recess for supporting a shaft portion of the winding pipe,
The shaft portion includes an engagement portion that is recessed in a direction intersecting with a rotation axis of the winding pipe,
The bearing recess includes a wall portion that constitutes the bearing recess,
the wall portion includes an insertion hole into which a fixing pin is inserted for fixing the shaft portion to the bearing recess,
the bearing recess includes a restricting portion that is displaced from a first state that restricts the insertion of the fixing pin through the insertion hole to a second state that allows the insertion of the fixing pin,
The restricting portion enables the fixing pin to engage with the engaging portion in the second state. The engagement portion is a through hole,
The roller screen according to claim 1 , wherein the wall portion includes a further insertion hole at a position opposite to the insertion hole, into which a tip of the fixing pin that has been inserted through the engagement portion is engaged. The restricting portion is a leaf spring biased in a direction away from the bottom portion surrounded by the wall portion,
2. The roller blind according to claim 1, wherein in the first state, the leaf spring blocks the entry path of the fixing pin from the insertion hole, and is pushed by the shaft portion to be displaced to the second state, thereby enabling the fixing pin inserted through the insertion hole to engage with the engagement. The regulating portion includes a regulating member disposed in a space surrounded by the wall portion and movable in a direction toward and away from a bottom portion surrounded by the wall portion;
a biasing means for biasing the regulating member in a direction toward the first state in which the regulating member is spaced from the bottom portion,
The roller screen according to claim 1 , wherein the regulating member includes a regulating hole that overlaps with the insertion hole to enable engagement of the fixing pin with the engagement portion in the second state in which the regulating member is pressed against the shaft portion. The roller screen according to claim 4, wherein the biasing means is a coil spring. the biasing means includes a first magnet disposed on the bottom portion and a second magnet disposed on the regulating member at a portion facing the bottom portion,
The roller blind according to claim 4 , wherein the first magnet and the second magnet are arranged so that the same poles face each other. the restricting portion is a restricting member that is arranged along the wall portion so as to be movable in a direction approaching and moving away from a bottom portion surrounded by the wall portion, the restricting member being positioned in the first state in which it is moved away from the bottom by its own weight, and being pushed by the shaft portion to move to the second state in which it is approached to the bottom,
The roller screen according to claim 1, wherein the regulating member includes a regulating hole that overlaps with the insertion hole in the second state to enable engagement of the fixing pin with the engagement portion.