JPH0432427Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention is based on the invention in which the sheet that is unwound by the rotation of the take-up shaft is extended beyond its maximum length, and furthermore, the sheet attachment part that is fixed to the take-up shaft is This invention relates to a sheet reverse winding prevention mechanism that prevents the sheet from being reversely wound due to rotational movement.

[Conventional technology]

For example, an awning that blocks sunlight by winding and unrolling a sheet is constructed as follows.

The awning is fixed to the upper frame of an opening such as a building entrance. Specifically, a base pipe with a length corresponding to approximately the entire width of the frontage opening is fixedly hung horizontally on multiple brackets attached to the building frame.
Shaft holders for rotatably supporting the winding shaft are provided at both ends of the base pipe. A winding shaft having a manual opening/closing device attached to one side end and having the proximal end of the sunshade sheet fixed to its peripheral surface is rotatably supported by the shaft holder. At both ends of the take-up shaft, clips having an arc-shaped cross section are fitted to restrict the unwinding of the sunshade sheet. A hollow rectangular prism-shaped front frame is attached to the leading end side of the sunshade sheet. Furthermore, two connecting arms each containing a built-in spring that is always biased in the direction of extension are attached at their proximal ends to two arm holders attached to the base pipe, and their distal ends are connected to the front frame.

In the awning constructed as described above, the opening/closing machine is rotated in one direction, and the winding shaft rotates in conjunction with the extension action of the connecting arm, and the awning sheet is fed out from the winding shaft and the awning sheet is stretched out. become. Further, when the opening/closing machine is rotated in the other direction, the winding shaft rotates in the opposite direction, and the sunshade sheet is wound onto the winding shaft against the urging force of the connecting arm.

[Problem that the invention attempts to solve]

However, as shown in FIGS. 5 to 7, in the above-mentioned conventional awning, when the operator manually operates the opening/closing machine to continue rotating the take-up shaft 2 in order to unwind the awning sheet 1, the maximum unwinding length of the awning sheet 1 is shortened. Since the winding shaft 2 is still rotatable even if the winding shaft 2 exceeds this point, the sheet fixing portion 1a of the sunshade sheet 1 rotates and the sunshade sheet 1 is reversely wound around the winding shaft 2 against the pinching pressure of the clip 3. Something happened.

As mentioned above, the following problems arose due to the reverse winding of the sunshade sheet.

(b) Since the sunshade sheet is wound backwards, there is a problem in that sand, dead leaves, snow, etc. on the sunshade sheet are caught in the winding, making the winding diameter thicker and hitting the bracket, causing damage to the sunshade sheet.

(b) Also, because the sheet attachment part was pressed against the clips in the opposite direction, the sunshade sheet was sometimes torn.

This invention was made in view of the above-mentioned problems, and the technical object is to provide a sheet reverse winding prevention mechanism that prevents a sunshade sheet from winding backwards and does not damage the sunshade sheet.

[Means for solving problems]

In order to solve the above problem, this invention has a ratchet wheel attached to the end of the winding shaft that winds up and unwinds the sheet, and a ratchet wheel that is swingably attached to the position corresponding to the ratchet wheel and is attached to the inner surface of the rolled sheet. A protrusion located between the take-up shafts and pressed by the sheet as the sheet fastening portion of the sheet rotates; and when this protrusion is pressed, it engages the claw portion of the ratchet wheel to stop the rotation of the take-up shaft. A mechanism for preventing reverse winding of a sheet is constituted by a locking body having a pawl body to prevent reverse winding of the sheet.

[Effect]

According to this invention, even if the take-up shaft is rotated to continue feeding out the sheet, and even if the sheet is extended beyond the maximum length and the sheet is reversely wound from the sheet attachment part, the winding inner side of the sheet and the winding Since the protruding part of the locking body is located between the shafts, the protruding part of the locking body is pressed by the movement of the sheet when the sheet fastening part rotates in the reverse winding direction. As a result, the pawl provided on the locking body engages with the pawl of the ratchet wheel attached to the take-up shaft, thereby stopping the rotation of the take-up shaft. Therefore, the rotation of the winding shaft is stopped by the lock between the ratchet wheel and the locking body, making it possible to prevent the sheet from winding backwards.

〔Example〕

An embodiment of this invention will be described based on the drawings. Figure 1 of the drawings is an overall perspective view of the awning with the reverse winding prevention mechanism attached, Figure 2 is an exploded perspective view of the reverse winding prevention mechanism, and Figures 3 and 4 are explanatory diagrams showing the operation of the reverse winding prevention mechanism. It is.

The awning A is constructed as follows, similar to the prior art. That is, brackets 5, 5 for supporting the base pipe 4 horizontally are fixed at the upper part of the opening B such as the entrance/exit B on the side of the body C. A winding shaft 2 is provided at both ends of the base pipe 4.
Shaft holders 6, 6 are fixedly installed to rotatably support the shaft. A worm reducer 7, which is a manual opening/closing device, is interposed on one side of the shaft holder 6. The base end of the sunshade sheet 1 is fixed to a part of the circumferential surface of the winding shaft 2 with double-sided tape or the like, and clips 3 are fitted onto both ends. On the other hand, a hollow rectangular prism-shaped front frame 8 is fixed to the leading end side of the sunshade sheet 1. In addition, two connecting arms 9, 9 each having a built-in spring that is always biased in the direction of extension are attached at their proximal ends to arm holders 10, 10, which are attached to the base pipe 4, and at their distal ends, respectively. It is connected to the front frame 8 mentioned above. Above the winding shaft 2, a case 11 is fixed to the frame C, and protrudes like an eave to a length that allows the front frame 8, which becomes the front end side when the sunshade sheet 1 is stored, to be stored.

In addition to the above configuration, in this embodiment, the front frame 8
A signboard 12 is attached to the front side of the vehicle via a support. This signboard 12 consists of a rectangular frame with approximately the same width as the front frame 8, and a front plate 12a depicting an advertisement/promotion is removably attached between the frames, and is attached to the upper and lower frames on the front side of the frame. is tape light 1
2b... are arranged. The above tape light 12b
Although not shown, the electric light cord is wired along one side of the connecting arm 9 and connected to a power source. Since the signboard 12 is configured as described above,
It is now possible to attach an illuminated sign to awning A.
Advertising is possible regardless of the operation of the awning, and by changing the front plate 12a, the signboard 1
2 can be easily rearranged.

In addition to the awning A configured as above,
The reverse winding prevention mechanism D of this invention is constructed as follows.

As shown in FIG. 2, the reverse winding prevention mechanism D includes a ratchet wheel 13 fixedly fitted onto the support shaft 2a of the winding shaft 2.
This constitutes a locking body 15 that is fitted onto the support shaft 2a and attached to a mounting plate 14 interposed between the ratchet wheel 13 and the worm reducer 7.

The ratchet wheel 13 has saw-shaped pawls 13a formed at regular intervals on its radial circumferential surface,
As described above, it is fixedly fitted onto one side of the support shaft 2a of the winding shaft 2.

On the other hand, the locking body 15 has a substantially L-shape and is located above the ratchet wheel 13, and its base end is swingable toward one side of the mounting plate 14, that is, the winding shaft 2 side, by means of a support shaft 16. It is installed on. A torsion coil spring 17 is fitted onto the support shaft 16, one side of which is hooked to the locking body 15, and the other side hooked to a pin 18 protruding from the mounting plate 14. , the locking body 15 is always urged upward in FIG. Reference numeral 19 is the mounting plate 14
The upward biasing of the locking body 15 is restricted by a locking pin protruding from the top. The locking body 15 has a projecting pin 20 protruding from its tip in a direction perpendicular to the extending direction of the locking body 15, and is located between the inner surface of the sunshade sheet 1 and the winding shaft 2. The ratchet wheel 13 is located in front of the mounting position of the protruding pin 20.
A claw body 21 that fits and locks into the claw portion 13a is formed facing downward. The protruding pin 20 is a sheet fixing portion 1a where the sunshade sheet 1 moves in the reverse winding direction.
When the sunshade sheet 1 rotates downward, the inside surface of the sunshade sheet 1 is pressed against the biasing force of the torsion coil spring 17. As a result, the locking body 15 pivots downward about the support shaft 16, and the pawl body 21 moves to the ratchet wheel 1.
It fits and locks into the claw portion 13a of No. 3.

The operation of the reverse winding prevention mechanism D configured as above will be explained together with the operation of the awning A. 1st
3 and 4, when the worm reducer 7 is rotated in the opening direction by a crankshaft (not shown) in order to unwind the sunshade sheet 1 of the awning A, the winding shaft 2 is already The attached awning sheet 1 is extended over the drawer opening B in cooperation with the urging force of the connecting arms 9, 9. At this time, if the worm reducer 7 continues to rotate, the sunshade sheet 1 will be pulled out to its maximum length, but when the sheet attachment part 1a is exposed and rotates, the inner side of the sunshade sheet 1 will be pulled out by the protruding pin 20 of the locking body 15. Since it presses and rotates downward, the claw body 2
1 is a ratchet wheel 1 rotating together with a winding shaft 2
3 and locks the winding shaft 2.
(See Figures 3 and 4). By the operation of the reverse winding prevention mechanism D, the sunshade sheet 1 is prevented from being reversely wound around the winding shaft 2.

Next, in order to wind up the sunshade sheet 1, if the worm reducer 7 is reversely rotated, the winding shaft 2 is rotated in the opposite direction to the above, and the sunshade sheet 1 is rotated against the urging force of the connecting arms 9, 9. It will be rolled up. In the reverse winding prevention mechanism D, the winding shaft 2 is connected to the sunshade sheet 1.
is wound up normally, so as the sheet fastening part 1a of the sunshade sheet 1 moves to reverse rotation, the protruding pin 20 of the locking body 15, which was pressed on the inner side of the sunshade sheet 1, is moved to the torsion coil spring 17. Since the locking body 15 is pivoted upward by the biasing force, the pawl body 21 of the locking body 15 is released from the locked state with the pawl portion 13a of the ratchet wheel 13.

Although the above-mentioned reverse winding prevention mechanism is attached to one side end of the take-up shaft, the present invention is not limited to this, and one piece may be attached to each side of the take-up shaft.

[Effect of idea]

Since this invention is constructed as described above, it has the following effects.

B Since the sunshade sheet will not be rolled backwards due to the reverse winding prevention mechanism, the sand on the sunshade sheet will
This prevents dead leaves, snow, etc. from being drawn in and increasing the winding diameter, and the sunshade sheet will not be damaged by contact with the bracket.

(b) Also, since there is no need to wind the sunshade sheet backwards,
The sheet fastening part is not pressed against the clip in the opposite direction, and the sunshade sheet is not torn.

[Brief explanation of the drawing]

Figure 1 of the drawings is an overall perspective view of an awning equipped with a reverse winding prevention mechanism according to this invention, Figure 2 is an exploded perspective view of the reverse winding prevention mechanism, and Figures 3 and 4 show the operation of the reverse winding prevention mechanism. FIGS. 5 to 7 are explanatory diagrams showing the state in which a conventional sunshade sheet is fed out. A...Awning, B...Opening, C...Structure, D...Reverse winding prevention mechanism, 1...Sunshade sheet,
1a... Sheet attachment part, 2... Winding shaft, 3
... Clip, 5, 5 ... Bracket, 7 ... Worm reducer (manual opening/closing device), 13 ... Ratchet wheel, 1
3a...Claw part, 14...Mounting plate, 15...
Locking body, 20... Projection pin (protrusion), 21...
Nail body.

Claims (1)

[Scope of utility model claims] a ratchet wheel attached to the end of a take-up shaft that winds up and unwinds the sheet, and a ratchet wheel that is swingably attached at a position corresponding to the ratchet wheel and located between the inner surface of the sheet and the winding shaft of the sheet. A locking body comprising a protrusion that is pressed by the sheet as the locking portion rotates, and a pawl that locks onto a pawl of the ratchet wheel to stop rotation of the winding shaft when the protrusion is pressed; A sheet reverse winding prevention mechanism consisting of: