JP6486873B2 - Roll screen - Google Patents

Description

  The present invention relates to a roll screen.

  Some conventional roll screens allow the screen to be moved and stopped at an arbitrary position by a wire provided along the side rail.

  For example, in Patent Document 1 below, a box-shaped bar guide body in which a base portion of an adjustment shaft is attached to an end portion of a weight bar so as to freely enter and exit in the longitudinal direction, and a leading end portion of the adjustment shaft is open on the outer surface side inside the side rail. Screw in from the inner side, and make the piece enter and exit from the outer side to contact the tip of the adjustment shaft, stretch the brake wire inside the side rail, and connect the wire to the upper and lower sides of the bar guide body. The brake wire is braked by bending the brake wire into a square shape and frictionally engaging the wire with the wire hole.

  According to this technology, the friction braking force is adjusted by adjusting the screwing amount of the adjustment shaft, and when the setting is made slightly larger than the elastic repulsion force of the winding spring at the lowest position of the screen, the screen is stopped at an arbitrary position. Can do.

  Further, even if the roll screen for a vehicle is used in a state where there is vibration, the friction braking force is not weakened. Therefore, the screen can be stopped at an arbitrary position regardless of the presence or absence of vibration.

Japanese Patent Laid-Open No. 5-311961

  However, when installing a roll screen on a non-rectangular window such as a vehicle, it is necessary to make the screen irregular according to the shape of the window. In this case, if the brake wire is installed in accordance with the shape of the screen, the brake wire is stretched obliquely, so that the screen cannot be lifted and lowered by being caught by the brake wire.

  On the other hand, if the length of the weight bar is extended beyond the end of the screen, the brake wire can be stretched vertically. In this case, the guide wire is placed at a position shifted outside the deformed window. Therefore, the position where the lower end of the brake wire is fixed is restricted.

  In view of the circumstances as described above, an object of the present invention is to provide a roll screen capable of moving a screen up and down along a guide member even when the screen has a shape other than a rectangle.

  In order to achieve the above object, a roll screen according to an embodiment of the present invention includes a support member, a winding pipe, a screen, a weight bar, and a guide member. The support member is attached to a fixed surface. Both ends of the winding pipe are rotatably supported by the support member. One end of the screen is connected to the winding pipe so as to be wound and unwound. The weight bar is connected to the other end of the screen. The guide member is provided near or at the center of the screen in the direction of the rotation axis of the winding pipe, and guides the weight bar when the screen is wound or unwound. Further, the guide member is connected to the other end side through a first guide member that guides the weight bar while being in contact with one end side of the weight bar, and an offset member provided at the other end side or the center of the weight bar. Or it has the 2nd guide member which guides the said weight bar in the position spaced apart from the center in the front-back direction of the said screen. Further, at least a part of the width of the screen in the direction of the rotation axis is formed smaller than the other part.

  According to this configuration, the first guide member is in contact with one end of the weight bar, while the second guide member guides at a position away from the other end of the weight bar, so that the second guide member does not interfere with the screen. Because of the position, even when the shape of the screen is at least partially small, the guide member can be raised and lowered without hindering the raising and lowering of the screen.

  The width of the screen in the rotation axis direction may be formed smaller as the winding direction or the unwinding direction.

  According to this configuration, even when the shape of the screen is a shape (trapezoid) other than a rectangle whose width is smaller (or larger) toward the weight bar, the guide member lifts and lowers the screen without hindering the lifting and lowering of the screen. Can be made.

  The first guide member and the second guide member may be provided at different positions with respect to the front-rear direction of the screen.

  As a result, the positions of the first guide member and the second guide member are different in the front-rear direction of the screen, so that even when the edge of the screen on the second guide member side is formed obliquely, the second guide member It is possible to prevent the screen from interfering. Further, compared to the case where both guide members are arranged on the side surface of the weight bar, the portion of the screen on the second guide member side that is offset is not provided with a guide member on its side portion, so that the roll screen It can shield to the edge part of the installed window, and can prevent light leakage from that part more.

  The edge of the screen on the second guide member side in the rotation axis direction may be non-parallel to the guide direction of the second guide member when viewed from the front-rear direction of the screen.

  Thereby, the shape of the screen can be determined independently from the guide direction of the second guide member.

  The first guide member may be a first guide wire that is stretched in the winding and unwinding directions and inserted into the one end of the weight bar. Further, the second guide member may be a second guide wire that is stretched in the winding and unwinding directions and is inserted into the spaced apart position of the offset member.

  Thereby, it can prevent that a 2nd guide wire interferes with a screen because the 2nd guide wire is penetrated in the position which the offset member separated.

  The first guide member may be a first guide rail that is provided in the winding and unwinding directions and that slides the one end of the weight bar. Further, the second guide member may be a second guide rail that is provided in the winding and unwinding directions and slides a portion of the offset member at the separated position.

  Thereby, it can prevent that a 2nd guide rail interferes with a screen because the 2nd guide rail slides the position which the offset member separated.

  A stopper provided at the one end of the weight bar, the stopper capable of switching the locking and unlocking of the weight bar to the first guide member and stopping the weight bar at any lift position; May be.

  As a result, the stopper is provided on the first guide member side of the weight bar, so that the design as a roll screen is improved, and the user can switch between locking and releasing the weight bar with the stopper while holding the weight bar. The elevating position can be adjusted, and the operability is improved.

  As described above, according to the present invention, the screen can be moved up and down along the guide member even when the screen has a shape other than a rectangle. However, this effect does not limit the present invention.

It is the figure which showed the shovel car in which the roll screen which concerns on one Embodiment of this invention was installed. It is a perspective view of the roll screen which concerns on one Embodiment of this invention. It is a front view of the roll screen shown in FIG. FIG. 4 is a front view showing a state in which the roll screen shown in FIG. 3 is raised halfway. It is a left view of the said roll screen. It is a right view of the said roll screen. It is a perspective view of the weight bar vicinity of the said roll screen. It is a fragmentary sectional view of the weight bar vicinity of the said roll screen. It is the front view and partial sectional view which showed the structure of the guide wire which the said roll screen has. It is the front view and partial sectional view which showed the state in which the tension | tensile_strength of the guide wire shown in FIG. 9 was adjusted. It is a figure which shows the attachment procedure of the said guide wire. It is a figure which shows the attachment procedure of the said guide wire. It is a figure which shows the attachment procedure of the said guide wire. It is a figure which shows the attachment procedure of the said guide wire. It is a fragmentary sectional view of the planar view around the stopper of the said roll screen. It is sectional drawing of the planar view around the stopper of the said roll screen. It is AA sectional drawing of FIG. It is sectional drawing of the planar view around the stopper of other embodiment of this invention. It is a perspective view of the roll screen which concerns on other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Roll screen configuration]
FIG. 1 is a view showing an excavator on which a roll screen as a blind according to an embodiment of the present invention is installed. FIG. 2 is a perspective view of the roll screen. FIG. 3 is a front view of the roll screen shown in FIG. FIG. 4 is a front view showing a state in which the roll screen shown in FIG. 3 is raised halfway. FIG. 5 is a left side view of the roll screen, and FIG. 6 is a right side view of the roll screen.

  As shown in FIG. 1, the roll screen 100 according to the present embodiment can be installed at a portion of a side window W in a cab D of a heavy machine such as an excavator S.

  The window W of the cab D such as the excavator S is not rectangular but has a trapezoidal shape (for example, a trapezoid whose upper side is longer than the bottom side, one of the left and right sides is vertical, and the other is non-vertical). The roll screen 100 has a shape that follows the shape of the window W that is not rectangular. Although not shown, a window is also present on the side surface on the opposite side of the cab D, and a roll screen 100 having a similar shape is installed in the window. In addition, although the window exists also in the front surface of the cab D and a roll screen is installed also in the said window, the shape is a rectangle.

  As shown in FIGS. 2 to 6, the roll screen 100 includes a support member 1, a winding pipe 2, a screen 3, and a weight bar 4.

  In the front view of the screen 3, the back side is the outdoor side, and the near side is the indoor side (operating room side).

  The support member 1 is attached to a fixed surface such as a wall surface or a frame body of the window W in the driver seat D of the excavator S by screws or the like, and supports the winding pipe 2. The support member 1 is composed of, for example, a set frame, and a pair of side plates 1a are attached to both side surfaces thereof as shown in FIG.

  As shown in FIG. 5, the winding pipe 2 is rotatably supported at both ends by a pair of side plates 1 a inside the support member 1.

  The screen 3 functions as a shielding material, one end of the screen 3 is connected to the winding pipe 2, and the screen 3 is suspended from the winding pipe 2 so as to be wound and unwound (lifted / lowered). The winding pipe 2 is always urged to rotate in the direction of winding the screen 3 by a winding spring (not shown).

  As shown in FIG. 3, the width of the screen 3 in the rotation axis direction (X direction in each figure) of the take-up pipe 2 is formed to be smaller in the unwinding direction of the screen 3 (downward in each figure Y direction). Yes. More specifically, the screen 3 is a front view of both sides facing in the X direction along the window W of the shovel car S, the upper side being longer than the bottom side among the upper side and the bottom surface facing each other in the Y direction. Has a trapezoidal shape in which the right side is vertical and the left side is non-vertical. Of course, the shape is appropriately changed according to the shape of the window W. For example, a mode in which a vertical side and a non-vertical side are interchanged is also assumed.

  A weight bar 4 is attached to the lower end of the screen 3. The lower end of the screen 3 is wound and fixed, for example, on a plate installed inside the weight bar 4 (see the screen stopper plate 31 in FIG. 14), but the lower end wraps around the weight bar 4 and sews. May be.

  In addition, in the vicinity of both ends of the screen 3 in the direction of the rotation axis of the winding pipe 2 (direction of each figure X), both ends of the weight bar 4 are placed when the screen 3 is raised and lowered (when winding or unwinding). A first guide wire 5 (right side in front view) and a second guide wire 6 (left side in front view) are provided as guide devices (guide members) for guiding.

  The first guide wire 5 is stretched between a first bracket 7a (lower part) and a second bracket 7b (upper part) as fixing members facing each other in the ascending / descending direction of the screen 3 (Y direction in each figure). Similarly, the wire 6 is stretched between a first bracket 8a (lower part) and a second bracket 8b (upper part) as fixing members facing each other in the ascending / descending direction of the screen 3. The bracket 7 and the first guide wire 5, and the bracket 8 and the second guide wire 6 constitute a guide device.

  The first guide wire 5 penetrates the weight bar 4, and the first guide wire 5 is in contact with one end of both ends in the X direction of the weight bar 4 when the screen 3 is raised and lowered. Guide the bar.

  On the other hand, the second guide wire 6 passes through the offset member 9 provided at the other end in the X direction of each weight bar 4. The offset member 9 is a member for forming a predetermined offset distance (for example, about 5 cm) from the other end in the front-rear direction of the screen 3 (the Z direction in each figure). Therefore, the second guide wire 6 guides the weight bar 4 at a position separated from the other end by the offset distance in the front-rear direction of the screen 3 through the offset member 9 when the screen 3 is moved up and down.

  Details of the guide device including the first guide wire 5 and the second guide wire 6, the first and second brackets 7 and 8, and the offset member 9 will be described later.

  As shown in FIGS. 2 to 4, a stopper 10 is provided at the end of the weight bar 4 on the first guide wire 5 side (bracket 7a side). The stopper 10 is capable of stopping the weight bar 4 at an arbitrary lift position by switching between locking (narrow attachment) and unlocking of the weight bar 4 to the first guide wire 5. . Details of the stopper 10 will also be described later.

[Details of guide device]
Next, details of the guide device will be described. FIG. 7 is a perspective view of the vicinity of the weight bar 4 of the roll screen 100, and FIG. 8 is a partial cross-sectional view of the vicinity of the weight bar 4.

  As shown in FIGS. 5 to 8, the offset member 9 of the guide device is a flat plate-like offset extending from one end portion (left end portion in front view) of the weight bar 4 in the front-rear direction of the screen 3 (Z direction in each drawing). A metal fitting 9a, a guide shaft 9b formed at the tip of the offset metal fitting 9a, and an offset hole 9c penetrating the center of the guide shaft 9b are provided. The second guide wire 6 is inserted through the offset hole 9c.

  By providing the offset hole 9c at the tip of the offset fitting 9a, the second guide wire 6 is positioned at a position separated from the weight bar 4 by an offset distance from the end of the weight bar 4 to the offset hole 9c. Guide 4

  Further, as shown in FIGS. 5 and 6, the first bracket 7a and the second bracket 7b, and the first bracket 8a and the second bracket 8b are arranged with the offset distance in the front-rear direction of the screen 3 (the respective Z directions). Are provided at positions separated by a distance corresponding to.

  Accordingly, the first guide wire 5 stretched between the first bracket 7a and the second bracket 7b and the second guide wire 6 stretched between the first bracket 8a and the second bracket 8b. It can be said that they are provided at positions separated by a distance corresponding to the offset distance in the front-rear direction of the screen 3.

  This prevents the screen 3 from interfering with the second guide wire 6 even when the shape of the edge 3a on the second guide wire 6 side of the screen 3 is formed non-vertically (obliquely) in front view. The screen 3 can be raised and lowered without hindrance.

  Compared with the case where both guide wires are arranged on the side surface of the weight bar 4, the portion of the screen 3 on the side of the offset second guide wire 6 is not provided with a guide wire on its side portion, so that the roll The end of the window W on which the screen 100 is installed can be shielded, and light leakage from that portion is further prevented.

  FIG. 9 is a front view (FIG. A) and a partial sectional view (B) showing the structure of the first guide wire 5. FIG. 10 is a front view (FIG. A) and a partial cross-sectional view (B) showing a state in which the tension of the first guide wire 5 shown in FIG. 9 is adjusted. Although not shown, the structure of the second guide wire 6 including the first bracket 8a and the second bracket 8b is the same.

  As shown in these drawings, the first bracket 7a on the lower end side and the second bracket 7b on the upper end side of the first guide wire 5 have through portions 71a and 71b through which the first guide wire 5 can pass, respectively. .

  The second bracket 7 b on the upper end side of the first guide wire 5 includes a tubular member 11 and a spring 12.

  The said cylindrical member 11 accommodates the upper end part of the said 1st guide wire 5 so that sliding is possible, and is inserted in the penetration part 71b of the said 2nd bracket 7b.

  The spring 12 is provided in the cylindrical member 11 as a compression coil spring, for example, and urges the upper end portion of the accommodated first guide wire 5 in a direction away from the lower end portion.

  In addition, the upper end portion of the first guide wire 5 has a diameter-enlarged portion configured by, for example, being wound and hardened with an adhesive, or pieced together so as not to pass through the spring 12. (Enormous part) 5a is formed.

  Further, a flange 11 a as a retaining portion is formed at the upper end of the cylindrical member 11. The flange 11a is locked to a part (upper end) of the penetrating portion 71b in a state where the cylindrical member 11 is inserted into the penetrating portion 71b of the second bracket 7b. The movement toward the lower end portion of the guide wire 5 is restricted.

  Further, a screw portion 5c is provided at the lower end of the first guide wire 5, and the first bracket 7a is screwed to the screw portion 5c at one end of the first guide wire 5 that has passed through the through portion 71a of the first bracket 7a. It has a nut 72 as an adjustment member that is connected together and regulates the movement of the first guide wire 5 in the direction of the upper end. That is, the nut 72 can draw the upper end portion of the first guide wire 5 toward the lower end portion by a tightening force by screwing in the arrow direction of FIG.

  The nut 72 also has a function of adjusting the tension of the first guide wire 5 by the tightening force. A marker 5 b is provided on the upper end portion of the first guide wire 5. When the nut 72 is tightened, the upper end portion of the first guide wire 5 is pulled toward the lower end side of the first guide wire 5 against the urging force of the spring 12. By exposing from the bottom, the guideline is provided for the user to indicate the above-mentioned tension, and to prevent the first guide wire 5 from being loosened or tightened too much.

  That is, when the first guide wire 5 is too loose, the first guide wire 5 does not hang straight in the Y direction of each figure, and therefore the lifting and lowering of the weight bar 4 is not smooth. On the other hand, if the first guide wire 5 is tightened too much, the elasticity of the spring 12 will not be effective, and vibration during the operation of the shovel car S cannot be absorbed. At the same time, the first guide wire 5 is easily cut.

  Therefore, the guide device for the roll screen 100 according to the present embodiment sets the exposure mode of the marker 5 b based on the tension of the first guide wire 5. For example, when the ideal tension (the tension that is neither too loose nor too tight) is “100 to 120 (N)” and the user tightens the nut 721 and becomes the tension, the marker 5b. Is designed to be exposed from the bottom of the cylindrical member 11.

  Of course, since the rigidity of the first guide wire 5 changes depending on the wire diameter or the like, the wire diameter or the like adopted in the present embodiment is set as described above. However, if the rigidity changes, the setting is also changed as appropriate. .

  More specifically, the place where the marker 5b appears about 5 mm from the cylindrical member 11 may be set as the ideal tension. The marker 5b may be 5 mm in length, or may be longer or shorter.

  When the length of the marker 5b is 5 mm, when the tension exceeding 5 mm is applied, the marker 5b is completely exposed and the first guide wire 5 itself above the upper end of the marker 5b is exposed. It may be set that too much is applied.

  In addition, the length of the marker 5b may be about 5 cm, and when the roll screen 100 is applied to the window W, the exposure length of the marker 5b at the ideal tension may be adjusted in advance with 5 mm as a guide. .

  Moreover, the place where the marker 5b can be seen from the bottom of the cylindrical member 11 may be an ideal tension, or can be appropriately changed to other settings and modes.

  Note that the marker 5b may be rubbed and disappear by simply coloring the surface of the first guide wire 5, and may be processed by, for example, baking coating or a heat shrinkable tube.

  With such a configuration, the user varies the connecting position between the lower end portion of the first guide wire 5 and the first bracket 7 a depending on whether the nut 72 is tightened or loosened, and the marker 5 b exposed from the bottom portion of the tubular member 11. As a guideline of the ideal tension of the first guide wire 5, the tension can be easily adjusted.

  As described above, the second guide wire 6 may have a structure similar to the structure shown in FIGS. 9 and 10 described above.

(Guide wire installation procedure)
FIG. 11A, FIG. 11B, FIG. 11C, and FIG. 11D are views showing a procedure for attaching the first guide wire 5. Although not shown, the procedure for attaching the second guide wire 6 is the same.

  As shown in FIGS. A and B, the user firstly has the upper end portion of the first guide wire 5 and the spring 12 in a state in which the enlarged diameter portion 5 a of the first guide wire 5 is locked to the upper end portion of the spring 12. Is inserted into the cylindrical member 11.

  Subsequently, as shown in FIGS. B and C, the user removes the nut 72 from the screw portion 5c at the lower end portion of the first guide wire 5, and then replaces the screw portion 5c with the through portion 71b of the second bracket 7b. Then, the screw portion 5c is inserted into the through portion 71a of the first bracket 7a.

  Subsequently, as shown in FIG. 4D, the screw portion 5c inserted through the through portion 71a of the first bracket 7a is screwed with the nut 72, and the cylindrical member 11 is inserted into the through portion 71b of the second bracket 7b. And the flange 11a of the cylindrical member 11 is latched by the upper end part of the penetration part 71b.

  Thereafter, as described above, the user can adjust the tension of the first guide wire 5 by tightening or loosening the nut 72. Moreover, what is necessary is just to perform the procedure contrary to the above, when removing the 1st guide wire 5 from the 1st bracket 7a and the 2nd bracket 7b.

  With such a configuration, the user inserts the cylindrical member 11 that accommodates the upper end of the first guide wire 5 into the penetration portion 71a of the first bracket 7a, and the screw portion 5c provided at the lower end of the first guide wire 5. Since the first guide wire 5 can be connected to each bracket simply by being inserted through the through portions 71a and 72b of the first bracket 7a and the second bracket 7b, workability and replacement when the first guide wire 5 is installed. Maintenance at the time is improved. At the same time, the other end portion (the enlarged diameter portion 5a) of the first guide wire 5 is stably supported by the spring 12 in the cylindrical member 11, and the strength is improved. Therefore, even when the roll screen 100 is installed in a place where vibration is likely to occur during operation, such as a heavy machine such as the excavator S, the fixing member such as the bracket of the first guide wire 5 may be damaged by vibration, 1 The guide wire 5 is prevented from falling off.

  Further, since the flange 11a is locked to the upper end portion of the penetrating portion 71b of the second bracket 7b, the user holds the flange 11a and pulls the cylindrical member 11 out of the penetrating portion 71b. The connection with the upper end of the first guide wire 5 can be easily released.

[Details of stopper]
Next, details of the stopper 10 will be described.

  FIG. 12 is a partial sectional view in plan view around the stopper 10 of the roll screen 100. FIG. 13 is a cross-sectional view in plan view around the stopper 10. 14 is a cross-sectional view taken along the line AA in FIG. FIGS. 12A, 13A, and 14A show a state in which the first guide wire 5 is tightly attached to the weight bar 4 by the stopper 10, and FIGS. 12B, 13B, and 14B show that the first guide wire 5 is the stopper. 10 shows a state in which the tight attachment to the weight bar 4 by 10 is released (the state in which the weight bar 4 can move relative to the first guide wire 5).

  As shown in these drawings, the stopper 10 has, for example, an elongated rectangular parallelepiped outer shape, and includes a rotation fulcrum portion 41, a narrow attachment portion 42, and an operation portion 43.

  The rotation fulcrum portion 41 is supported by a rotation shaft inside the weight bar 4 and serves as a fulcrum for rotation of the stopper 10 around the rotation shaft. The direction of the rotation axis of the rotation fulcrum 41 is a direction parallel to the direction in which the first guide wire 5 is stretched (Y direction in each figure).

  The narrow portion 42 is provided between the rotation fulcrum portion 41 and one end portion (cap 4 a) of the weight bar 4 inside the weight bar 4. Further, a stopper spring 45 is provided on the operation portion 43 side inside the stopper 10, and the narrow portion 42 is rotated counterclockwise in FIGS. 12 and 13 by the stopper spring 45. Is always energized.

  A convex portion 51 protruding in the Z direction is formed in the vicinity of the tip of the narrow portion 42 rotated by the rotational fulcrum portion 41, and at a position facing the convex portion 51 inside the stopper 10, A recess 52 is formed. As shown in FIG. 14, the convex portion 51 clamps the first guide wire 5 in a crank shape between the convex portion 51 and the concave portion 52 by the biasing force of the stopper spring 45 when the stopper 10 is not operated. To do.

  By the convex portion 51 and the concave portion 52, the first guide wire 5 is not narrowed in a plane, but is tightly attached in a crank shape, so that the weight bar 4 is reliably held in the narrowed position. Become.

  The operation unit 43 is located on the opposite side of the pivoting fulcrum part 41 from the narrowing part 42 (a position closer to the center of the weight bar 4 than the narrowing part 42). It is provided so as to be exposed in the direction. The operation unit 43 is pressed by the user's hand or the like in the direction of the arrow P in FIGS. 12 and 13 against the urging force of the stopper spring 45, so that the rotation fulcrum unit 41 performs FIGS. 13 is rotated in the clockwise direction (arrow R direction), and the pinching of the first guide wire 5 by the pinching portion 42 can be released.

  With this configuration, since the narrow portion 42 of the stopper 10 is built in the weight bar 4 and the operation portion 43 is exposed from the weight bar 4, the design is improved. Further, the user holds the weight bar 4 with one hand (right hand), and presses the exposed operation portion 43 with, for example, the thumb and rotates the stopper 10 to pinch the first guide wire 5 by the pinching portion 42. By releasing the wearing and releasing the pressing of the operation part 43 after raising and lowering the weight bar 4, the clamping part 42 clamps the first guide wire 5 again and stops the weight bar 4 at an arbitrary raising and lowering position. And operability is improved.

  Furthermore, the clamping part 42 is a structure which can cancel | release clamping of the 1st guide wire 5 by the rotation which uses the rotation fulcrum part 41 as a rotating shaft, and can simplify a structure and can achieve a compact member. Therefore, since the operation part 43 is not conspicuous, the design property is also improved in this respect.

  Furthermore, since the operating portion 43 is provided at a position closer to the center of the weight bar 4 than the narrow portion 42, the user's operating point is closer to the center of the weight bar 4. While pressing 43, the weight bar can be gripped and lifted stably with one hand.

[Roll screen operation]
Next, the operation of the roll screen 100 configured as described above will be described.

  When the user grips the weight bar 4 together with the stopper 10 and presses the operating portion 43 of the stopper 10 from the state where the roll screen 100 is pulled down to the lower end as shown in FIG. 1 Narrow attachment of the guide wire 5 is released.

  At this time, since the force in the winding (upward) direction acts on the screen 3 due to the urging of the winding spring built in the winding pipe 2, the user can apply the upward force while holding the weight bar 4 by hand. When added, the weight bar 4 and the screen 3 ascend along the first guide wire 5 and the second guide wire 6 as shown in FIG.

  At this time, the first guide wire 5 guides the weight bar 4 while being in contact with one end of the weight bar 4, while the second guide wire 6 is separated from the other end of the weight bar 4 by the offset distance by the intervention of the offset member 9. The weight bar 4 is guided at the position. Thereby, the 2nd guide wire 6 can raise / lower the screen 3 smoothly, without interfering with the edge 3a of the non-vertical screen 3.

  When the user raises the weight bar 4 and releases the pressure on the operation portion 43 at a desired position, the first guide wire 5 is again narrowed by the stopper 10, and the weight bar 4 is caused by the narrowing force. And the screen 3 stops at this position.

  The user can stop the weight bar 4 at a desired position by performing the same operation as described above even when the screen 3 is lowered from the state where the screen 3 is raised to the upper end.

[Summary]
As described above, according to the present embodiment, since the second guide wire 6 is in a position where it does not interfere with the screen 3, the shape of the screen 3 is a shape other than a rectangle having a smaller width toward the weight bar 4 (trapezoidal shape). ), The second guide wire 6 can lift and lower the screen 3 without hindering the lifting and lowering of the screen 3.

  Further, according to the present embodiment, the upper end portion of the first guide wire 5 (second guide wire 6) is biased in the direction away from the lower end portion of the first guide wire 5 by the spring 12 in the cylindrical member 11. Since the flange 11a of the cylindrical member 11 is locked to the second bracket 7b, the user simply inserts the cylindrical member 11 into the through portion 71b of the second bracket 7b, and the first guide wire 5 is inserted. Can be coupled to the second bracket 7b. Thereby, the workability at the time of installation of the guide wire and the maintenance at the time of replacement are improved, and the upper end portion of the guide wire is stably supported by the spring in the cylindrical member, and the strength is improved.

  Furthermore, according to the present embodiment, the narrow portion 42 of the stopper 10 is built in the weight bar 4 and the operation portion 43 is exposed from the weight bar 4. The weight bar 4 can be stopped at any lift position simply by rotating the stopper 10 with the exposed operation portion 43, and a roll screen excellent in operability can be provided.

[Other Embodiments of Stopper]
Next, details of the stopper 60 will be described as another embodiment.

  FIG. 15 is a cross-sectional view in plan view around the stopper 60 of the roll screen 100. FIG. 15A shows a state in which the first guide wire 5 is tightly attached to the weight bar 4 by the stopper 60, and FIG. 15B shows a state in which the first guide wire 5 is released from being attached to the weight bar 4 by the stopper 60. (The state in which the weight bar 4 is movable with respect to the first guide wire 5) is shown.

  As shown in these drawings, the stopper 60 includes a base 65, a narrow portion 42, and an operation portion 43 that protrudes to the front side of the weight bar 4.

  The base 65 is fixed inside the weight bar 4, has a wedge shape that gradually approaches in the direction of the sandwiching portion, and an insertion portion 66 into which the guide wire 5 can be inserted is formed. The guide wire 5 is provided with a pair of engaging elements 67 that can contact from both sides.

  The narrow portion 42 is disposed so as to accommodate the base 65 on one end side of the weight bar 4 inside the weight bar 4, and on the side opposite to the base 65 inside the stopper 10, a stopper spring 45 is provided. The narrow portion 42 is always urged by the stopper spring 45 so as to move in the X direction.

  A pressing surface 61 that is inclined in accordance with the wedge shape of the base 65 is formed in the vicinity of the distal end of the narrow portion 42, and the pressing surface 61 is in the non-operating state of the stopper 60 as shown in FIG. Due to the urging force of the stopper spring 45, the engaging element 67 is pressed in the direction in which the guide wire 5 is clamped to clamp the first guide wire 5.

  Since the base 65 has a wedge shape and the pressing surface 61 is inclined according to the wedge shape of the base 65, the pressing surface 61 pushes the engaging element 67 as the sandwiching portion 42 moves in the base direction, Since the force with which the engaging element 67 clamps the guide wire 5 increases, the weight bar 4 is reliably held in the narrowed position.

  The operation portion 43 is pressed in the direction of arrow P in FIG. 15 against the urging force of the stopper spring 45 by the user's hand or the like, so that the sandwiching portion 42 moves away from the base 65. The clamping of the first guide wire 5 by the clamping part 42 can be released.

  With this configuration, since the narrow portion 42 of the stopper 60 is built in the weight bar 4 and the operation portion 43 is exposed from the weight bar 4, the design is improved. Further, the user can pinch the first guide wire 5 by the pinching portion 42 by holding the weight bar 4 with one hand (right hand) and moving the stopper 60 by pressing the exposed operation portion 43 with, for example, the thumb. Is released and the pressing of the operating portion 43 is released after the weight bar 4 is lifted and lowered, so that the sandwiching portion 42 again sandwiches the first guide wire 5 and the weight bar 4 can be stopped at any lifting position. And operability is improved.

[Modification]
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present technology.

  In the above-described embodiment, the first guide wire 5 and the second guide wire 6 are shown as guide members provided at different positions in the front-rear direction (Z direction) of the screen 3. Instead, guide rails may be used.

  FIG. 16 is a perspective view of a roll screen in which a guide rail is used as a guide member.

  As shown in the figure, the guide member of the roll screen 200 according to the modification includes a first guide rail 15 and a second guide rail 16.

  The first guide rail 15 has a guide groove 15a on the inner surface for guiding one end portion of the weight bar 4 in the Y direction in the figure when the screen 3 is moved up and down.

  Further, an offset member 9 having a function similar to that of the above-described embodiment is provided at the other end of the weight bar 4. Specifically, the offset member 9 in the figure extends from the other end of the weight bar 4 in the front-rear direction (Z direction) of the screen 3 by the offset distance and extends in the X direction (guide groove 16a of the second guide rail 16). It is configured as an L-shaped member bent in the direction).

  The second guide rail 15 slides the bent portion of the offset member 9 that is separated from the weight bar 4 by the offset distance when the screen 3 is moved up and down.

  Further, at the end portion of the weight bar 4 on the first guide rail 15 side, the weight bar 4 is switched by locking and unlocking the weight bar 4 with respect to the first guide rail 15 in the same manner as in the above-described embodiment. Is provided with a stopper 10 that can be stopped at any lift position.

  The stopper 10 has a structure in which the inner surface of the first guide rail 15 (guide groove 15a) is pressed by a spring or the like in the non-operating state. For example, in a non-operating state, a structure is provided in which a member that engages and press-contacts with the guide groove 15a by a biasing force of a spring is provided, and the pressing by the member is released when the operation portion 43 is pressed. May be.

  As described above, even when the guide rail is employed as the guide member, the second guide rail 9 is prevented from interfering with the screen 3 by sliding the second guide rail 6 at the separated position of the offset member 9. be able to.

  In the above-described embodiment, the shape of the screen 3 is such that the upper side of the upper side and the bottom surface facing each other in the Y direction is longer than the bottom side, the right side in the front view of both sides facing in the X direction is vertical, and the left side is The trapezoidal shape is non-vertical. However, the shape of the screen 3 is not limited to the above shape as long as the width is at least partially formed smaller than the other portions. For example, the screen 3 may have a trapezoidal shape whose upper side is shorter than the bottom side, a trapezoidal shape in which both sides facing each other in the X direction are non-vertical, It is good also as a shape where the width | variety of the both sides which oppose in a X direction is narrow in the middle position of a direction. Even in such a case, a guide wire provided at a position separated in the front-rear direction of the screen 3 is appropriately used.

  In the above-mentioned embodiment, the flange 11a latched by the upper end of the 2nd bracket 7b was shown as a retaining part which controls the movement to the lower end part direction of the said 1st guide wire 5 of the said cylindrical member 11. As shown in FIG. . However, the retaining portion is not limited to the flange 11a. For example, the penetrating portion 71b and the cylindrical member 11 of the second bracket 7b are formed in an inverted conical shape whose diameter decreases as it goes from the upper part to the lower part, or an inverted pyramid shape whose sectional area decreases as it goes from the upper part to the lower part. A retaining portion may be configured.

  In the above-described embodiment, the example in which the fixing structure shown in FIGS. 9 to 11 is used for both the first guide wire 5 and the second guide wire 6 is shown. However, the fixing structure may be employed for only one of the guide wires.

  In the above-described embodiment, the threaded portion at the lower end of each guide wire and the nut 72 are used to adjust the tension of the first guide wire 5 and the second guide wire 6. However, the adjustment of the tension may be realized by a structure other than the screw portion and the nut 72. For example, a claw provided at the lower end portion of the first guide wire 5 and a plurality of engaging portions (engaged with the claw provided in the vertical direction (Y) direction at the lower end portion of the first bracket 7a). The tension may be adjusted by a hole, an engaging protrusion, or the like.

  In each of the above-described embodiments, examples in which the present invention is applied to a roll screen having the screen 3 as a shielding material have been shown. However, the guide wire fixing structure shown in FIG. 9 to FIG. 11 and the stopper 10 narrowing structure shown in FIG. 12 to FIG. Is equally applicable.

DESCRIPTION OF SYMBOLS 1 ... Support member 2 ... Winding pipe 3 ... Screen 4 ... Weight bar 5 ... 1st guide wire 5a ... Expanded diameter part 5b ... Marker 5c ... Screw part 6 ... 2nd guide wire 7a * 8a ... 1st bracket 7b * 8b 2nd bracket 9 ... offset member 9a ... offset metal fitting 9b ... guide shaft 9c ... offset hole 10 ... stopper 11 ... tubular member 11a ... flange 12 ... spring 15 ... first guide rail 15a ... guide groove 16 ... second guide rail 16a ... guide groove 41 ... rotating fulcrum part 42 ... narrow attachment part 43 ... operating part 45 ... stopper spring 51 ... convex part 52 ... concave part 71a / 71b ... through part 72/82 ... nut 100/200 ... roll screen S ... excavator Car D ... Driver's seat W ... Window

Claims (7)

A support member attached to the fixed surface;
A winding pipe rotatably supported at both ends by the support member;
A screen having one end connected to the winding pipe so as to be wound and unwound, and
A weight bar connected to the other end of the screen; a guide member provided near or at the center of the screen in the direction of the rotation axis of the winding pipe, and guiding the weight bar when the screen is wound or unwound. Comprising
The guide member includes a first guide member that guides the weight bar while being in contact with one end side of the weight bar, and the other end side or the other end side via an offset member provided at the other end side or the center of the weight bar. A second guide member for guiding the weight bar at a position spaced from the center in the front-rear direction of the screen;
A roll screen in which at least a part of the screen has a width in the direction of the rotation axis that is smaller than the other part. The roll screen according to claim 1,
The roll screen is formed such that a width of the screen in the direction of the rotation axis decreases as the winding direction or the unwinding direction. The roll screen according to claim 1 or 2,
The first guide member and the second guide member are roll screens provided at different positions with respect to the front-rear direction of the screen. The roll screen according to claim 1, wherein
A roll screen in which a side of an end portion of the screen on the second guide member side in the rotation axis direction is not parallel to a guide direction of the second guide member when viewed from the front-rear direction of the screen. The roll screen according to any one of claims 1 to 4,
The first guide member is a first guide wire that is stretched in the winding and unwinding directions and is inserted into the one end of the weight bar.
The roll screen, wherein the second guide member is a second guide wire that is stretched in the winding and unwinding directions and is inserted into the separated position of the offset member. A roll screen according to any one of claims 1 to 5,
The first guide member is a first guide rail that is provided in the winding and unwinding directions and slides the one end of the weight bar.
The second guide member is a roll screen that is a second guide rail that is provided in the winding and unwinding directions and slides a portion of the offset member at the separated position. The roll screen according to any one of claims 1 to 6,
A stopper provided at the one end of the weight bar and capable of stopping the weight bar at any lift position by switching between locking and unlocking of the weight bar with the first guide member. Roll screen.