JP5976848B2 - Panel and its mounting structure - Google Patents

Description

  The present invention relates to a panel installed on the shoulder or side wall of an expressway, such as a sound insulation panel for blocking noise of a traveling automobile and a concealment panel for concealing between the road and the outside, and a mounting structure of the panel. Is.

  Conventionally, a panel such as a sound insulation panel or a concealment panel is provided along a road on a shoulder or side wall of an expressway. As an example, there is a sound insulation wall provided along the road on both sides of the road in order to prevent the noise of a traveling automobile from being transmitted to the road periphery. Specifically, this sound insulation wall is installed with standing pillars of a certain height on both sides of the road at regular intervals, and the sound insulation panel is mounted so as to straddle between adjacent pillars, so that the sound insulation wall has a desired height. Are arranged side by side in the height direction.

  The sound insulation wall provided in this way may fall off the support column because the sound insulation panel is refracted and deformed when the automobile collides. In order to prevent the sound insulation panel from falling, in Patent Document 1 (Japanese Patent Laid-Open No. 9-151418) and Patent Document 2 (Japanese Patent Laid-Open No. 2003-313830), a wire rope is inserted into a plurality of adjacent sound insulation panels. A technique for preventing a single sound insulation panel from falling is disclosed.

  Specifically, the sound insulation panel of Patent Document 1 is provided with through portions provided at both ends of each panel so as to penetrate in the height direction, and through portions at both ends of the plurality of panels arranged stacked in the height direction. By inserting a pair of sound insulation plate fall-preventing ropes through the two panels, the panels are connected in the height direction to prevent the individual panels from falling.

  In addition, the sound insulation panel of Patent Document 2 is provided with a horizontal guide groove member that guides the drop-preventing rope body on the back side of the panel so as to extend in the horizontal direction, and the fall-prevention rope body in the horizontal guide groove member. Protruding a ring that allows the drop-through to pass through, and inserting a drop-preventing rope into each ring of adjacent panels in the horizontal direction to connect the panels in the horizontal direction to prevent individual panels from falling Is.

JP-A-9-151418 JP 2003-313830 A

  However, the sound insulation panels described in Patent Documents 1 and 2 have the following problems in the complexity of panel replacement.

  That is, in the sound insulation panels of Patent Documents 1 and 2, the plurality of sound insulation panels are provided with insertion holes through which wires are inserted, and the plurality of panels are fixed. For this reason, for example, in the sound insulation panel of Patent Document 1, when replacing the sound insulation panel located on the lower side, it is necessary to remove all the sound insulation panels above the sound insulation panel to be replaced, and the replacement work is performed. Was very cumbersome. Similarly, in the panel of Patent Document 2, it is necessary to replace the sound insulation panel after removing the inserted wires from the ring body of all panels including the sound insulation panel connected to the sound insulation panel to be replaced. there were.

  Furthermore, since the sound insulation panel of Patent Document 2 is provided with a wire on the outside and requires a complicated process such as attachment / detachment of the wire, it is necessary to perform from the outside of the sound insulation panel. It was done with permission to use the land outside the road and a foothold on the land. For this reason, construction work is complicated, and replacement work from the inside of the road that does not require land use permission has been desired.

  Accordingly, an object of the present invention is to solve the above-described problem and provide a sound insulation panel and its mounting structure that can be easily replaced.

In order to achieve the above object, the present invention is configured as follows.
The panel according to the present invention is provided between a pair of panel mounting posts arranged at intervals in the lateral direction, and a fall prevention member that penetrates a fall prevention wire fixed to the panel mounting posts is provided on the back side. A panel fitted in a fixed hole,
The fall prevention member is formed in a spiral shape around a plurality of turns, and is connected to a spiral part that defines an insertion space through which the fall prevention wire is inserted through a gap between the spirals and a lower end of the spiral part. A housing portion extending in a direction along the axis, and a fixing portion extending in a direction substantially orthogonal to the housing portion and fixing the fall prevention member to the back side of the panel, and by bending the rod-shaped member The spiral part, the casing part and the fixing part are integrally configured,
A cross section in which the fixing portion extends in a direction intersecting the axis of the spiral portion is configured as a non-circular rod, and the fixing hole is configured in a shape corresponding to the cross-sectional shape of the rod-shaped fixing portion.

  It is preferable that the fall preventing member is configured to be detachable from the back surface of the panel.

The fall prevention member is configured in a rod shape in which the fixed portion extends in a direction intersecting the axis of the spiral portion,
A rotation preventing portion provided in parallel with the fixed portion;
By preventing the rotation of the fall prevention member around the fixing portion by inserting the fixing portion and the leading end side of the rotation preventing portion into the fixing hole and the insertion hole provided on the back surface of the panel, respectively. Can do.

The fall prevention member is configured in a rod shape in which the fixed portion extends in a direction intersecting the axis of the spiral portion,
The fixing portion has a non-circular cross section, and is fitted into a fixing hole having a shape corresponding to the cross sectional shape of the bar-like member provided in the panel, thereby preventing rotation around the fixing portion. The fall prevention member can be fixed in a state.

  In the above configuration, the fixing portion is configured with a male screw at a distal end portion, and is fixed with a fixing nut in a state of being inserted through the fixing hole, so that the fall prevention member can be reliably fixed to the doctor. .

  The fall prevention member is configured so that the axis of the spiral portion is in the short direction of the panel, and a plurality of stacked layers in the short direction can be connected to each other by the fall prevention wire. Thus, by allowing the panel removed from the panel mounting column to slide in the short direction, the work of inserting the fall prevention wire into the fall prevention member can be simplified.

In order to solve the above-mentioned problem, the panel mounting structure according to the present invention includes a panel installed between a pair of panel mounting columns arranged at intervals in the lateral direction, and a fixing hole on the back side of the panel. A panel mounting structure for preventing the panel from falling by passing a fall preventing wire fixed to the panel mounting column to the fall preventing member inserted in the panel,
The fall prevention member is formed in a spiral shape when it circulates a plurality of times , a spiral portion that defines an insertion space through which the fall prevention wire is inserted through a gap in the spiral, and a spiral shaft connected to a lower end of the spiral portion And a fixing portion for fixing the fall prevention member portion on the back side of the panel extending in a direction substantially orthogonal to the casing portion, and bending the rod-like member to form the spiral. The shape part, the housing part and the fixed part are integrally formed,
A cross section in which the fixing portion extends in a direction intersecting the axis of the spiral portion is configured as a non-circular rod, and the fixing hole is configured in a shape corresponding to the cross-sectional shape of the fixing portion.

In order to solve the above-mentioned problem, the fall-preventing metal fitting according to the present invention is provided on the back surface of a panel installed between a pair of panel mounting columns arranged at intervals in the lateral direction, A drop-preventing bracket that prevents the panel from falling by penetrating a fall-preventing wire fixed to
It is configured in a spiral shape when it circulates a plurality of times, and extends in a direction along the spiral axis connected to the lower end of the spiral portion and a spiral portion that defines an insertion space through which the fall prevention wire is inserted through the gap of the spiral A housing portion; and a fixing portion that extends in a direction substantially orthogonal to the housing portion and fixes the fall prevention member to the back side of the panel. The helical portion and the housing are formed by bending a rod-shaped member. The part and the fixed part are integrally formed,
A cross section in which the fixing portion extends in a direction intersecting with the axis of the spiral portion is configured as a non-circular rod.

  Further, the drop preventing member has a non-circular rod-shaped cross section in which the fixed portion extends in a direction intersecting the axis of the spiral portion, so that a cross section of the rod-shaped member provided in the panel If it fits in the fixed hole of the shape corresponding to a shape, a fall prevention member can be easily fixed in the state which prevented the rotation centering on the said fixing | fixed part.

  According to the present invention, since the fall prevention wire can be detached from the middle part of the fall prevention wire through the gap between the spiral portions of the fall prevention member and inserted into the insertion space of the fall prevention member, the fall prevention wire The single panel can be removed without disassembling. Therefore, only the panel to be replaced can be removed alone from the inside of the road, and there is no need to assemble a scaffold or the like outside the road, so that the panel replacement operation can be simplified.

  In addition, the spiral portion of the fall prevention member is a rod-shaped member formed into a spiral shape. In addition to being easy to configure, the connecting portion between the members and a movable portion can be moved like a combination of a plurality of members. There is no age-related deterioration of parts. Therefore, it can be suitably used for preventing the fall of the highway panel that has been exposed to wind and rain for a long time.

It is a mimetic diagram showing the sound insulation panel attachment structure concerning one embodiment of the present invention. It is an assembly exploded view of the sound insulation panel mounting structure of FIG. It is a partial expanded sectional view which shows the structure of the support | pillar mounting part of the sound-insulating panel mounting structure of FIG. It is a side view which shows typically the sound insulation panel attachment structure of FIG. It is a perspective view which shows the structure of the fall prevention metal fitting used for the sound-insulation panel mounting structure of FIG. It is a figure which shows the process of inserting a fall prevention wire in the fall prevention metal fitting of FIG. It is a perspective view which shows the other structural example of a fall prevention metal fitting. It is a perspective view which shows the further another structural example of a fall prevention metal fitting. It is a partial expansion perspective view of the fall prevention metal fitting of FIG. It is a disassembled perspective view which shows the attachment structure to the sound insulation panel of the fall prevention metal fitting of FIG.

  Hereinafter, a sound insulation panel mounting structure according to an embodiment of the panel mounting structure of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a sound insulation panel mounting structure according to an embodiment of the present invention. FIG. 2 is an exploded view of the sound insulation panel mounting structure of FIG.

  The sound insulation panel mounting structure 1 according to the present embodiment is used for the sound insulation wall W standing on the side of the highway R, and has the configuration shown in FIG. 1 as viewed from the outside (back side) of the highway R. . This sound insulation wall W is an H-shaped steel panel mounting column (hereinafter, simply referred to as a column) that is erected so that the adjacent grooves M face each other at regular intervals along the longitudinal direction of the road R. A plurality of sound insulation panels 3 are fixed between 2. The sound insulation panel 3 prevents or suppresses sound generated in the road from leaking out of the road, and is provided on the support column 2 from the inside (front side) of the road. The sound insulation panel 3 is attached in a state where the sound insulation walls W are stacked vertically so that the sound insulation wall W has a predetermined height.

  An attachment portion 2a for fixing to the side wall S of the expressway R is provided at the lower end portion of the support column 2, and a support column dropping prevention wire 6 is inserted through the attachment portion 2a. The support | pillar fall prevention wire 6 prevents that the said support | pillar 2 etc. fall under the road even if the attaching part 2a of the support | pillar 2 comes off from the side wall S by the collision of a motor vehicle etc. by connecting a some support | pillar.

  As shown in FIG. 3, the sound insulation panel 3 is configured by combining a punching metal 7 and a casing 9 located on the front surface located on the inner side of the road. The casing 9 is a box-shaped member that is open on one side, and the sound absorbing material 8 is accommodated therein, and the punching metal 7 is configured to close the opening portion of the casing 9.

  The casing 9 is a flat metal member having an opening closed by a punching metal or the like 7 provided on the front surface, and attachment portions 10 for attachment to columns are provided at both ends. Further, as shown in FIGS. 2 and 4, the casing 9 is provided with a drain hole 9 a for discharging rain that has penetrated into the inside through seven through holes such as punching metal.

  As shown in FIG. 3, the sound insulation panel 3 is assembled so that the sound absorbing material 8 is housed in the casing, and the opening of the casing is closed with a punching metal or the like 7. Bolts and nuts 12 are passed through the holes 11 and fixed to the front wall 2 f of the column 2.

  The sound insulation panel 3 is attached so that the punching metal 7 is located inside the road, and the sound generated in the road is absorbed by the sound absorbing material 8 in the casing 9 through the through hole of the punching metal 7 so that the sound is generated on the road. Prevent or suppress leakage to the outside.

  As the sound absorbing material 8, a commonly used one can be used. In general, fiber bodies such as glass wool and polyester are used, but porous bodies such as polyurethane foam, powder sintered bodies such as ceramics, etc. may be used, and the kind thereof is not particularly limited. In addition, when using a fibrous body as the sound-absorbing material 8, it is preferable to provide a protective film for preventing scattering.

  The thickness dimension of the casing 9 is configured in a rib shape so that the central portion in the height direction is slightly shallow, and the strength against the external force in the thickness direction is ensured. The center portion is provided with a fall prevention fitting 13 as will be described later.

  A fall-preventing metal fitting 13 is provided on the back side of the sound-insulating panel 3, and a plurality of sound-insulating panels 3 are connected to the fall-preventing member 13 by inserting the panel fall-preventing wire 14 and deformed by an automobile collision or the like. The bent sound insulation panel 3 is prevented from falling from the support column 2 down the road.

  A panel wire 14 is inserted into the fall prevention metal fitting 13, and when a plurality of panels are connected to each other or a support by the panel wire 14, an arbitrary sound insulation panel is detached from the support 2. Even if it exists, the panel is prevented from falling. As shown in FIGS. 4 and 5, the fall-prevention fitting 13 is formed by bending a rod-shaped member having a circular cross section, and includes a spiral portion 15, a casing portion 16, and a fixing portion 17. It is fixed to the back surface of the casing 9.

  A panel fall prevention wire (hereinafter simply abbreviated as “panel wire”) 14 connects a plurality of sound insulation panels 3 connected to one column 2 as shown in FIG. In FIG. 1, the panel wire 14 is shown only in the center column, and the invisible portions are omitted from the columns at both ends. Both ends (front end 14 a and end 14 b) of the panel wire are fixed near the lower end in the groove M of the support 2. The starting end 14a of the panel wire is fixed to the groove M on the right side of the drawing, is routed upward on the support column 2, and is inserted into the fall-preventing metal fitting 13 of the sound insulation panel 3 on the left side of the drawing facing from above. Furthermore, a certain amount of extra length is provided at the lower end portion of the support column 2 and the fall-preventing metal fitting 13 of the opposite right sound insulation panel 3 is inserted from the lower side, descends in the groove portion M on the left side of the figure, and the terminal end 14b is the groove portion M. Fixed inside.

  The spiral portion 15 of the fall prevention fitting 13 is bent in a spiral shape, and defines an insertion space 18 through which the panel wire 14 is inserted at the center portion. Further, the number of turns of the spiral portion 15 is not limited so long as the sound insulation panel 3 is detached from the panel wire 14 when the sound insulation panel 3 is detached from the support column 2, and depending on the pitch D of the spiral, the number of turns is approximately two or more. This function can be ensured.

  The pitch D of the helix is not particularly limited as long as it can perform the insertion operation of the panel wire 14 described later with reference to FIG. 6, and needs to be equal to or larger than the diameter of the panel wire 14. As will be described later, the panel wire 14 is inserted into the insertion space 18 of the spiral portion through the gap 19 of the spiral portion 15. Further, the tip 15a of the spiral portion 15 needs to be an open end. For example, a barb is provided on the tip 15a of the open end so that the panel wire 14 does not easily fall off. You can also.

  The housing portion 16 extends from the lower end of the spiral portion 15 along the axis of the spiral portion 15, and the lower end is bent by approximately 90 ° to form a fixed portion 17. The casing portion 16 is for securing a space between the fixing portion 17 and the spiral portion 15 and facilitating the insertion work of the panel wire 14. The length is approximately several centimeters. It is configured.

  The fixing portion 17 extends in a direction intersecting with the axis of the spiral portion 15, and fixes the fall prevention metal fitting 13 to the back surface of the sound insulation panel 3 by a male screw 17 b provided at the tip. As shown in FIG. 3, the fixing portion 17 is inserted into a fixing hole 22 penetrating the back surface of the casing 9, and the loosening prevention nut 20 a and the fixing nut 20 b are screwed together with a male screw 17 b, thereby 9 is fixed. At this time, the spiral axis of the spiral portion 15 is preferably arranged in a direction along the short direction of the sound insulation panel 3.

  FIG. 6 is a diagram illustrating a process of inserting the panel wire through the fall prevention fitting. In order to insert the panel wire into the fall-preventing metal fitting, an intermediate portion of the panel wire 14 is inserted into the gap 19 of the spiral portion 15, and the panel wire 14 is moved along the spiral portion 15 as indicated by an arrow 90. Then, it is moved in the gap 19 and inserted into the insertion space 18 from the tip 15 a of the spiral portion 15. Thereby, the fall prevention metal fitting 13 can be penetrated from the intermediate part of the wire 14 for panels, and the removal | desorption between both can be made easy.

  The fall prevention metal fitting 13 forms a helical part by bending a single bar-shaped member, and passes the panel wire 14 through the insertion space defined by the helical part, whereby the fall prevention metal fitting 13 and the panel wire 14 are provided. The wire 14 for a panel once connected does not come off naturally. In addition, since a plurality of members are combined and combined, or a part of the annular portion is not movable, manufacturing is easy. Further, the fall prevention member 13 is exposed to wind and rain for a long time during use, but since there are no coupling parts and movable parts as described above, problems such as loosening and breakage do not occur, and the quality does not deteriorate over time.

  FIG. 7 is a perspective view showing another configuration example of the fall prevention metal fitting. Since the fall-preventing metal fitting 13 shown in FIG. 5 is screwed on the back side of the sound insulation panel 3 by the fixing portion 17 having a circular cross section, when the tightening strength of the nuts 20a and 20b is not sufficient, The fall prevention metal fitting 13 may rotate and fall off.

  In order to solve this problem, specifically, as shown in FIG. 7, an anti-rotation pin 21 as an example of the anti-rotation portion is provided on the housing portion 16 so as to be juxtaposed with the fixing portion 17. By inserting the tip portion of the rotation prevention pin 21 into the insertion hole 23 provided in the sound insulation panel 3, the fall prevention metal fitting 13 can be prevented from rotating.

  FIG. 8 is a perspective view showing still another configuration example of the fall prevention metal fitting. FIG. 9 is a partially enlarged perspective view of the fall prevention metal fitting of FIG. The anti-falling metal fitting 24 shown in FIG. 8 adds a detent mechanism to the fixing portion 25 so as not to rotate with respect to the sound insulation panel 3 in order to prevent the anti-falling metal fitting from rotating and falling off as described above. ing.

  As shown in FIG. 9, in the fall prevention metal fitting 24, the side surface of the external thread 26 of the fixing | fixed part 25 is cut | disconnected to make the flat part 27, and the cross-sectional shape of the fixing | fixed part 25 is comprised by substantially ellipse. The cross-sectional shape of the fixing portion 25 is a non-circular shape, and the fixing portion 25 is fitted into the fixing hole 28 by forming a fixing hole 28 having a long hole shape corresponding to the cross-sectional shape as shown in FIG. The fall prevention metal fitting 24 can be prevented from rotating around the fixed portion 25.

  Note that the sound insulation panel 3 and the fall prevention metal fitting 24 can be fixed using a locking nut 20a and a fixing nut 20b arranged on both surfaces of the casing 9 of the sound insulation panel 3, as shown in FIG.

  Next, a procedure for attaching the sound insulation panel 3 between the columns 2 and 2 adjacent along the expressway will be described.

  As described above, the sound insulation panel 3 is fixed to the front wall 2f front side of the columns 2 and 2. First, as shown in FIG. 1, both ends of the panel wire 14 are fixed to the lower part of the column 2, and the laying path shown in FIG. 1 is connected to each sound insulation panel 3 along the column 2. Arrange so that

  Thereafter, the panel wire 14 is inserted into the insertion space 18 of the fall prevention fitting 13 provided on the back side (outside) of the sound insulation panel 3 by the procedure described above with reference to FIG. As described above, since the panel wire 14 is laid with a certain extra length, the insertion work can be performed by pulling the panel wire 14 toward the front side of the column 2.

  In this way, the mounting portion 10 of the sound insulation panel 3 in which the fall prevention metal fitting 13 and the panel wire 14 are connected is brought into contact with the front wall 2f front side of the column 2 so as to penetrate the screw hole 11 and the front wall 2f. The sound insulation panel 3 is fixed to the columns 2 and 2 by bolts and nuts 12.

  The sound insulation panel 3 may be removed by a procedure reverse to the above, and the sound insulation panel 3 is removed from the support columns 2 and 2 so that the fall prevention fitting 13 and the panel wire 14 are disconnected.

  Hereinafter, the sound insulation panel 3 and the panel wire 14 are connected in the same manner, and the sound insulation panel 3 is arranged so as to overlap in the vertical direction. In this embodiment, since the panel wire 14 and the spiral axis of the spiral portion are provided along the short direction of the sound insulation panel 3, the fall prevention bracket 13 or the like can be obtained by retracting the sound insulation panel 3 in the vertical direction. Since the hand can easily reach the panel wire 14 and the both can be detached, work efficiency can be improved.

  For example, when a car collides with the sound insulation wall W configured in this manner, the sound insulation panel 3 is pushed out in a state of being refracted and deformed toward the outside of the road. Since the fall prevention metal fitting 13 protruding from the sound insulation panel 3 is connected to the panel wire 14, even if the sound insulation panel 3 is detached from the pillars 2 on both sides, the panel wire 14 is suspended by the panel wire 14. Will not fall into.

  According to the present embodiment, when only the damaged sound insulation panel 3 is replaced, the fall prevention metal fitting 13 and the panel wire 14 can be detached from the middle portion of the panel wire 14, so that the replacement work of the sound insulation panel 3 can be performed. In this case, it is not necessary to remove the panel wire 14 from the column 2, and since the sound insulation panel 3 can be pulled out to the front (front side) of the road using the extra length of the panel wire 14, There is an advantage that it is possible to work from the inside.

  As described above, according to the sound insulation panel mounting structure according to the present embodiment, the fall prevention metal fitting 13 provided on the sound insulation panel 3 and the panel wire 14 are attached / detached from an intermediate portion of the panel wire 14. Therefore, only the damaged panel can be removed and replaced without disassembling the panel wire 14.

  In addition, this invention is not limited to the said embodiment, It can implement in another various aspect. For example, the fall prevention metal fitting 13 has a male screw portion directly attached to, for example, an intermediate position of the spiral portion 15 other than the one formed by bending a single rod-like member as shown in FIG. You may be comprised so that the both ends of the helical part 15 may open | release.

  In addition, the shape of the fixing portion having a non-circular cross section for preventing the fall prevention metal member from preventing rotation is not limited to a substantially elliptical shape, and may be another shape.

  Furthermore, in the said embodiment, although the helical part is carrying out the coiled helical shape excellent in the suspension strength, you may be comprised by the spiral shape within one plane, for example. Even with this configuration, the fall-preventing bracket and the panel wire can be attached and detached from the middle portion of the panel wire, and even if each individual sound insulation panel falls off the column, the sound insulation panel can be dropped. Can be prevented.

  Moreover, although the said embodiment demonstrated as a sound-insulation panel attachment structure, it is also applicable similarly in the attachment structure of the concealment panel for concealing the inner side and the outer side of a road, for example.

  It is to be noted that, by appropriately combining arbitrary embodiments of the various embodiments described above, the effects possessed by them can be produced. Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.

DESCRIPTION OF SYMBOLS 1 Sound insulation panel mounting structure 2 Panel mounting support | pillar 2a Mounting part 2f Front wall 3 Sound insulation panel 6 Strut fall prevention wire 7 Punching metal 8 Sound absorption material 9 Casing 10 Mounting part 11 Screw hole 12 Bolt / nut 13, 24 Drop prevention member 14 For panels Fall prevention wire 15 Helical part 15a Open end tip 16 Housing parts 17, 25 Fixing parts 17b, 26 Male screw 18 Insertion space 19 Clearance 20a Loosening prevention nut 20b Fixing nut 21 Anti-rotation pin 22 Fixing hole 23 Insertion hole 27 Flat Part R Expressway W Sound insulation wall

Claims (7)

A panel that is installed between a pair of panel mounting columns arranged at intervals in the horizontal direction and that is fitted in a fixing hole provided on the back side of a fall prevention member that penetrates a fall prevention wire fixed to the panel mounting column. Because
The fall prevention member is formed in a spiral shape around a plurality of turns, and is connected to a spiral part that defines an insertion space through which the fall prevention wire is inserted through a gap between the spirals and a lower end of the spiral part. A housing portion extending in a direction along the axis, and a fixing portion extending in a direction substantially orthogonal to the housing portion and fixing the fall prevention member to the back side of the panel,
By bending the rod-shaped member, the spiral portion, the casing portion, and the fixing portion are integrally configured,
A cross section in which the fixing portion extends in a direction intersecting the axis of the spiral portion is configured as a non-circular rod, and the fixing hole is configured in a shape corresponding to a cross-sectional shape of the rod-shaped fixing portion; panel.   The said fall prevention member is a panel of Claim 1 comprised so that attachment or detachment to the said panel back surface is possible. The fall prevention member is configured in a rod shape in which the fixed portion extends in a direction intersecting the axis of the spiral portion,
A rotation preventing portion provided in parallel with the fixed portion;
The panel according to claim 1 , wherein a front end side of the fixing portion and the rotation prevention portion is inserted through a fixing hole and an insertion hole provided on a back surface of the panel. The panel according to claim 3 , wherein the fixing portion is fixed with a fixing nut in a state in which a distal end portion is constituted by a male screw and is inserted through the fixing hole.   The fall prevention member is fixed so that the axis of the spiral portion is in the short direction of the panel, and a plurality of stacked in the short direction can be connected to each other by the fall prevention wire. The panel according to claim 1. A panel is installed between a pair of panel mounting columns arranged at intervals in the lateral direction, and a fall prevention wire fixed to the panel mounting column is fitted to a fall preventing member fitted in a fixing hole on the back side of the panel. A panel mounting structure that prevents the panel from falling by penetrating
The fall prevention member is formed in a spiral shape when it circulates a plurality of times , a spiral portion that defines an insertion space through which the fall prevention wire is inserted through a gap in the spiral, and a spiral shaft connected to a lower end of the spiral portion And a fixing portion for fixing the fall prevention member portion to the back side of the panel extending in a direction substantially orthogonal to the casing portion,
By bending the rod-shaped member, the spiral portion, the casing portion, and the fixing portion are integrally configured,
A panel mounting in which the fixing portion has a non-circular rod-like cross section extending in a direction intersecting the axis of the helical portion, and the fixing hole has a shape corresponding to the cross-sectional shape of the fixing portion. Construction. Drop that is provided on the back of the panel installed between a pair of panel mounting posts arranged at intervals in the horizontal direction, and prevents the panel from falling by penetrating a fall prevention wire fixed to the panel mounting post Prevention brackets,
It is configured in a spiral shape when it makes multiple turns, and extends in a direction along the spiral axis that connects to the lower end of the spiral portion and defines the insertion space through which the fall prevention wire is inserted through the gap between the spirals. A housing portion, and a fixing portion that extends in a direction substantially orthogonal to the housing portion and fixes the fall prevention member to the back side of the panel,
By bending the rod-shaped member, the spiral portion, the casing portion, and the fixing portion are integrally configured,
A fall-preventing metal fitting in which the cross section extending in a direction intersecting with the axis of the spiral portion is configured as a non-circular rod.

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