JP4066426B2 - fence - Google Patents

Description

[0001]
[Technical field belonging to the invention]
The present invention relates to a fence suitable for application to a snow fence or the like in which a snow screen can be folded in two.
[0002]
[Prior art]
Conventionally, snow fences that can store snow screens (snow panels and snow nets) between the struts have been used so that the view from vehicles traveling on the road is not obstructed when snow protection is not required except during winter. It has been.
[0003]
As shown in FIG. 4, the above-described storage-type snow fence includes a snow screen 2 provided between the support columns 1, an upper screen 5 suspended at the upper end by a pulling rope 4 passing through a pulley 3 at the upper end of the support column, and a lower end. There is a configuration in which a part can be folded by connecting a lower screen 6 rotatably supported by a support column via a hinge 7 so as to be relatively rotatable. FIG. 4A shows a storage state in which the snow screen 2 is folded, FIG. 4B shows a state in the middle of starting the snow screen 2, and FIG. 4C shows a use state in which the snow screen 2 is vertically raised by the tow rope 4. FIG. In addition, although illustration is abbreviate | omitted, after making the upper screen 5 and the lower screen 6 into the straight perpendicular | vertical state with the tow rope 4, the fixing mechanism which fixes the upper and lower screens 5 and 6 to the support | pillar 1 in that state is provided. Yes.
[0004]
As shown in the figure, this type of conventional snow fence is configured such that when the upper screen 5 is lifted by the tow rope 4, the upper screen 5 and the lower screen 6 are vertical. And after making the upper screen 5 and the lower screen 6 into a perpendicular state, the upper screen 5 and the lower screen 6 are fixed to the support | pillar 1 with the said fixing mechanism, and it is set as the use state in which the snow screen 2 has a snow protection function. Reference numeral 8 denotes a support shaft that rotatably supports the lower screen 6 on the support column 1, and 9 denotes a stopper that contacts when the snow screen 2 is in a vertical state.
[0005]
[Problems to be solved by the invention]
In the conventional snow fence 1 described above, even if the snow screen 2 is hung by the pulling rope 4 and the snow screen 2 is vertical, the vertical posture is not stable. For this reason, there is a possibility that the snow screen 2 will return to the square shape again as indicated by a two-dot chain line, and it is difficult to fix the snow screen 2 to the support column 1 with the fixing mechanism, resulting in poor workability. There was a problem. In addition, if the other end of the tow rope 4 is connected and fixed somewhere, the vertical posture can be maintained, but there are not many appropriate places to connect the tow rope 4, and a separate place to connect is provided as a structure. It is complicated as a work.
[0006]
The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and in a fence such as a snow fence having a snow screen that can be folded in two, when the screen is raised, a generally vertical posture is stabilized. It is an object of the present invention to provide a fence that can be easily maintained, and can make it easy to start up a screen and make it ready for use.
[0007]
[Means for Solving the Problems]
The fence of the present invention that solves the above problems includes a screen provided between struts, an upper screen with an upper end suspended by a tow rope passing through a pulley at the upper end of the strut, and a lower portion whose lower end is rotatably supported by the strut When the upper screen is lifted by a tow rope, the hinge is positioned so that the upper screen and the lower screen are in a straight line. The upper screen and the lower screen are in an overbending state beyond the vertical axis when the state is reached.
[0008]
Claim 2 is the fence of claim 1, wherein the tow rope connecting position at the upper end of the upper screen is offset to the screen folding side with respect to the vertical axis when the upper screen and the lower screen are in a straight line. It was made to be characterized.
[0009]
A third aspect of the present invention is the fence of the second aspect, wherein the position of the support shaft at the lower end of the lower screen is opposite to the screen folding side with respect to the vertical axis when the upper screen and the lower screen are in a straight vertical state. It is characterized by being offset to.
[0010]
Claim 4 is the fence according to claim 1, 2 or 3, wherein the hinge portion of the screen is set so that the angle formed by the upper screen and the lower screen does not exceed a certain angle of 180 ° + α when the screen is started up. The support is provided with a stopper for stopping the forward movement in the vicinity.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Below, although this invention is demonstrated as what was implemented as a snow fence, FIG. 1 is a rear view (figure seen from the road and other side) of the snow fence 10 (20) of 1st, 2nd embodiment. FIG. 2 shows a schematic side view of the snow fence 10 of the first embodiment. (A) is a state in which the snow screen is stored, (B) is a stage in the middle of starting the snow screen, and (C) is snow protection. Indicates the state where the screen is launched. As shown in these drawings, the snow fence 10 according to the present invention includes a snow screen 12 provided between columns 11, an upper screen 15 having an upper end suspended by a pulling rope 14 passing a pulley 13 at the upper end of the column, and a lower end. When the upper screen 15 is lifted by the traction rope 14, the lower screen 16, which is rotatably supported by the support column 11, is connected to the lower screen 16 via a hinge 17 so that it can be folded. The position of the hinge portion 17 exceeds the vertical axis L when the upper screen 15 and the lower screen 16 are in a straight vertical state, and the upper screen 15 and the lower screen 16 are overbended as indicated by a two-dot chain line. This is a configuration that is in a state. Reference numeral 18 schematically shows a support shaft that rotatably supports the lower screen 16 on the column 11. Further, the fixing mechanism 22 schematically shown in FIG. 1 is configured such that the upper screen 15 and the lower screen 16 are brought into a straight vertical state with the tow rope 14, and then the upper and lower screens 15, 16 are placed in the column 11 in that state. It is the fixing mechanism which fixes to. 2 are actually the left and right frames of the upper screen 15 and the lower screen 16.
A stopper 19 is attached to the support 11. The stopper 19 is positioned in front of the snow screen 12 in the vicinity of the hinge portion 17 so that the angle formed by the upper screen 15 and the lower screen 16 does not exceed a certain angle of 180 ° + α when the snow screen 12 is raised (see FIG. The movement to the left in 2 (c) is stopped. Reference numeral 21 denotes a fixed lower snowboard.
[0012]
A tow rope connecting position for connecting the tow rope 14 to the upper end portion of the upper screen 15 is indicated by P. As shown in the drawing, the tow rope connecting position P is the snow screen folding side with respect to the vertical axis L when the upper screen 15 and the lower screen 16 are in a straight vertical state (left side in FIG. 2 (C)). Are offset (the amount of offset is indicated by a).
[0013]
In the snow fence 10 described above, when the snow screen 12 is raised by pulling the tow rope 14 from the housed state of FIG. 2 (a), the upper screen 15 and the lower screen 16 are shaped like FIG. 2 (b). Further, the traction force of the traction rope 14 that lifts the offset connection position P in the vicinity where the upper screen 15 and the lower screen 16 are in a straight vertical state as shown by the solid line in FIG. 2 causes the upper screen 15 to further rotate in the clockwise direction in FIG. 2C from the vertical axis L, and therefore the lower screen 16 connected by the hinge portion 17 further counterclockwise from the vertical axis L. So that the hinge portion 17 exceeds the vertical axis L and the upper screen 15 and the lower screen 16 are indicated by a two-dot chain line. -Barbend state (the angle formed by the upper and lower screens 15 and 16 is 180 ° + α (an angle slightly larger than 180 °)) and hits the stopper 19, whereby the standing posture is stably maintained ( The upper and lower screens 15 and 16 do not return to a square shape). Therefore, subsequently, it becomes easy to fix the upper and lower screens 15 and 16 to the column 11 by the fixing mechanism 22 schematically shown in FIG. 1, and the workability is improved.
In the state where the snow screen 12 is overbended and applied to the stopper 19, the overbend state is stably maintained, so there is no need to connect the tow rope 14 anywhere and it can be made free. However, it does not exclude connecting somewhere.
[0014]
FIG. 3 shows a snow fence 20 according to another embodiment. In this embodiment, as in the embodiment of FIG. 2, the tow rope connecting position P at the upper end of the upper screen 15 is set to the snow screen 12 ′ when the upper screen 15 and the lower screen 16 ′ are in a straight vertical state. The vertical axis L is offset to the snow screen folding side (the offset amount is indicated by a), and the position of the support shaft 18 ′ at the lower end of the lower screen 16 ′ is set to the snow screen folding side with respect to the vertical axis L. Is offset on the opposite side (the offset amount is indicated by b).
[0015]
Also in the snow fence 20 described above, when the snow screen 12 'is raised by pulling the tow rope 14 from the stored state of FIG. 3 (a), the upper screen 15 and the lower screen 16' are not as shown in FIG. 3 (b). It becomes a letter shape and gradually rises vertically. Then, in the vicinity where the upper screen 15 and the lower screen 16 ′ are in a straight vertical state as shown by the solid line in FIG. 3C, the rotational moment due to the traction force of the traction rope 14 that lifts the offset connection position P is The upper screen 15 is further rotated in the clockwise direction from the vertical axis L. Therefore, the lower screen 16 ′ connected by the hinge part 17 is further rotated in the counterclockwise direction from the vertical axis L, and the hinge part 17 is rotated in the vertical axis. Beyond L, the upper screen 15 and the lower screen 16 ′ are in an overbend state as shown by a two-dot chain line and hit the stopper 19, whereby the rising posture is stably held.
In this embodiment, the position of the support shaft 18 ′ of the lower screen 16 ′ is offset from the vertical axis L to the side opposite to the folding side. Therefore, the center of gravity of the lower screen 16 ′ is supported by the support shaft 18 in the overbend state. Since it is on the left side in FIG. 3 (c), there is no more possibility that the lower screen 16 'will rotate back in the clockwise direction, and the startup posture will be maintained more stably.
[0016]
Note that the snow screen in the snow fence may be a snow panel using a molded perforated plate or a snow net using a net.
Further, in the above description, the support column 11 is shown as simply standing upright on the ground. However, as a retractable snow fence, the support column 11 is actually configured to be stored in a horizontal state. In this case, the support column 11 in FIG. 1 is composed of a fixed lower support column 11a and an upper support column 11b that can tilt in the road extending direction (left-right direction in FIG. 1), for example, and a support shaft at the lower end of the lower screen 16 (16 ′). 18 (18 ') is provided on the lower support 11a side. Moreover, although demonstrated as a snow fence above, this invention is applicable not only to a snow fence but to a wind fence, a fog barrier, and other fences that can be used to fold the screen. In that case, the screen functions as a windscreen, a fog screen, or the like.
[0017]
【The invention's effect】
According to the fence of the present invention, when the upper screen of the screen composed of the upper screen and the lower screen connected to each other by the hinge portion so as to be folded in two is lifted by the pulling rope, the position of the hinge portion is set to the upper screen and the lower screen. Since the upper screen and the lower screen are in an overbend state beyond the vertical axis when the screen is in a straight vertical state, when the screen is raised from the stowed state, the screen is It is possible to stably maintain the standing posture, and the work of fixing the screen to the support becomes easy.
[Brief description of the drawings]
FIG. 1 is a rear view of a snow fence according to an embodiment of the present invention (viewed from a side opposite to a road).
FIGS. 2A and 2B are schematic side views of a snow fence according to an embodiment of the present invention. FIG. 2A shows a state in which the snow screen is stored, FIG. 2B shows a stage in the middle of starting the snow screen, and FIG. Indicates a state in which a snow screen is started up.
FIGS. 3A and 3B are schematic side views of a snow fence according to another embodiment of the present invention. FIG. 3A is a state in which the snow screen is stored, and FIG. 3B is a stage in the middle of starting the snow screen. ) Shows the state where the snow screen is started up.
FIG. 4 shows a schematic side view of a conventional snow fence, where (a) shows a state in which the snow screen is stored, (b) shows a stage in the middle of starting the snow screen, and (c) shows a snow screen standing. Indicates the raised state.
[Explanation of symbols]
10, 20 fence (snow fence)
11 Prop 12, 12 'screen (snowproof screen)
13 Pulley 14 Upper tow rope 15 Upper screen 16, 16 'Lower screen 17 Hinge 18, 18' Support shaft 19 Stopper L Vertical axis P Tow rope connecting position

Claims (4)

The screen provided between the columns can be relatively rotated via a hinge between the upper screen suspended at the upper end by a pulling rope passing through the pulley at the upper end of the column and the lower screen supported at the lower end rotatably on the column. When the upper screen is lifted by a tow rope, the hinge portion is positioned beyond the vertical axis when the upper screen and the lower screen are in a straight vertical state. The fence is characterized in that the upper screen and the lower screen are overbended. The traction rope connecting position at the upper end of the upper screen is offset to the screen folding side with respect to the vertical axis when the upper screen and the lower screen are in a straight vertical state. fence. 3. The position of the support shaft at the lower end of the lower screen is offset to the opposite side of the screen folding side with respect to the vertical axis when the upper screen and the lower screen are in a straight vertical state. The fence described. In order to prevent the angle between the upper screen and the lower screen from exceeding a certain angle of 180 ° + α when starting up the screen, a stopper is provided on the support column to prevent the screen from moving forward in the vicinity of the hinge portion. The fence according to claim 1, 2 or 3.

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