Fence

Abstract

To provide a fence which, in the case where a person or a vehicle collides with a support pillar of the fence, has low risk of the support pillar hitting the person or the vehicle due to a reaction force, even when being separated from the support pillar.SOLUTION: In a fence P, support pillars 1 are raised on a base plate 3, and a panel body 2 is mounted between the support pillars 1. The base plate 3 is constituted by a pair of rising parts 32 raised opposing to each other in the left and right of the support pillar 1; a support part 34 raised in front of the support pillar 1; and a receiving part 33 raised behind the support pillar 1. The fence P is constituted in such a manner that a lower part 11 of the support pillar 1 is supported between the rising parts 32 so as to be inclined backward, an elastic member 5 for energizing the lower part 11 of the support pillar 1 backward is arranged between the lower part 11 of the support pillar 1 and the support part 34, and frontward inclination of the support pillar 1 is prevented by the receiving part 33.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fence that is installed along the boundary between a house, factory, park, etc. or along the boundary between neighboring properties, and more particularly to a fence in which the fence posts are erected via base plates. [Background technology]

[0002] Generally, when installing fences along the boundary between houses, parking lots, etc., or along the boundary between neighboring properties, the fence posts are installed by creating a concrete foundation at the bottom of the posts and burying this foundation in the ground.

[0003] In fences installed by these methods, if a vehicle such as an automobile collides with the fence body or the posts, not only will the posts be deformed, but the colliding vehicle may also be deformed or otherwise be damaged.

[0004] For example, Patent Document 1 proposes a movable protective fence consisting of multiple posts that are tiltably erected at their lower ends via elastic bodies, a fence body arranged between the posts, and a connector connecting the fence body to the posts, with a tension body embedded in a relaxed state within the rubber-like elastic body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Practical application registration number 2560885 [Patent Document 2] JP 2011-094340 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the above-mentioned movable protective fence, when a person leans against the post or a vehicle collides with it, the post tilts and the energy is absorbed as elastic energy by the rubber-like elastic material. Therefore, when the person or vehicle moves away from the post, the elastic energy is released and the reaction causes the post to tilt beyond its original position to the opposite side, which could result in it hitting the person or vehicle, which was a problem.

[0007] In Patent Document 2, to solve this problem, a receiving part and a leaf spring are used to prevent the support pole from tilting forward, but in order to obtain a certain reaction force, the size of the leaf spring must be large, and multiple leaf springs must be placed in the forward tilt direction of the support pole, and the base plate to house the leaf springs is also large in size. This requires a large space for installation, and if the distance between the fence and the base plate is narrowed, there are problems with installation and safety, such as people tripping over the base plate or it coming into contact with the vehicle body.

[0008] To provide a fence which solves the above-mentioned problems and reduces the risk of the post hitting a person or vehicle due to the reaction force even if the person or vehicle collides with the fence post and separates from the post. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention has the following configuration.

[0010] In other words, the fence of this invention is a fence in which posts are mounted on base plates installed at intervals, and a panel body is attached between the posts, and the base plate has a pair of rising portions erected opposite each other on the left and right of the post, a support portion erected in front of the post, and a receiving portion erected at the rear of the post, and the lower part of the post is supported between the rising portions so as to be able to tilt backward, and the receiving portion is adapted to prevent the post from tilting forward, and an elastic member is arranged between the lower part of the post and the support portion for urging the lower part of the post backward, and the elastic member has a plurality of coil springs arranged above and below. Effect of the Invention

[0011] According to the present invention, by using coil springs instead of leaf springs, the size of the base plate can be reduced, and the risk of people tripping or coming into contact with the vehicle body can be reduced. In addition, when a person or vehicle collides with the front of the support pillar, the support pillar tilts backward while dispersing and absorbing the impact energy by the coil springs above and below the elastic member, so the degree of backward tilt of the support pillar can be reduced.

[0012] In the fence according to the present invention, a spacer may be disposed between the upper and lower coil springs.

[0013] In the fence according to the present invention, the elastic member may include a coil spring having a different spring constant disposed inside at least the downward coil spring. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a rear view showing one embodiment of a fence according to the present invention. [Diagram 2] FIG. 2 is a side view of FIG. [Diagram 3] FIG. 2 is an explanatory diagram of the main part of FIG. [Figure 4] 4 is a cross-sectional view of a main part taken along the line AA in FIG. 3. [Diagram 5] FIG. 5 is a rear view of FIG. [Figure 6] 5 is a cross-sectional view of a main part taken along the line BB in FIG. 4. [Figure 7] FIG. 7 is an explanatory diagram showing a tilted state of the support column in FIG. 6. [Figure 8] 7 is a cross-sectional view of a main part taken along the line CC in FIG. 6. [Figure 9] FIG. 4 is a diagram showing an example of a coil spring shape according to the present invention. [Figure 10] FIG. 2 is a diagram showing the shape of a cover material according to the present invention. [Figure 11] FIG. 9 is an explanatory diagram showing the spacer of FIG. 8. [Figure 12]FIG. 13 is an explanatory diagram of a main part showing a modification of the fence according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Next, the best mode for carrying out the present invention will be specifically described with reference to the drawings.

[0016] 1 and 2, 1 denotes posts, 2 denotes a panel body attached between the posts 1, and 3 denotes a base plate on which the posts 1 are erected. The fence P according to the present invention is mainly composed of the posts 1, the panel body 2, and the base plate 3. In this embodiment, the posts 1 are made of square steel pipes which are stable in strength and inexpensive, but they may be round steel pipes or posts made of steel material with an H-shaped cross section. They may also be made of other metals such as stainless steel alloys and aluminum alloys. The posts 1 are attached to the base plate 3, and the panel body 2 is attached between the posts 1.

[0017] The panel body 2 is generally made of a metal plate or a lattice-like panel having a rectangular surface when viewed from the front, which is attached between the posts 1, and clearly indicates the site boundary etc. at the front and rear of the panel body 2, making it difficult for intruders to cross the boundary and invade.

[0018] The panel body 2 in this embodiment is formed by arranging a large number of vertical wires 21 and horizontal wires 22 in a lattice pattern and joining the vertical wires 21 and horizontal wires 22 by welding at their intersections. The vertical wires 21 and horizontal wires 22 are preferably made of steel wires which are stable in strength and inexpensive, but wires made of other metals such as stainless steel alloys and aluminum alloys may also be used. Furthermore, the vertical wires 21 and horizontal wires 22 may be metal-plated or painted to improve their corrosion resistance and weather resistance.

[0019] Fig. 3 shows the structure of the base plate 3 for the support 1 in Fig. 1, where (a) is an enlarged view of the main part and (b) is a side view of (a). In this embodiment, the mounting bracket 4 for mounting the panel body 2 to the support 1 has a J-shaped bolt B1 with a folded portion 41 formed at the tip that penetrates the support 1 from front to back, and the horizontal wire 22 of the support 1 is engaged with the folded portion 41, and a nut N1 is tightened on a rod-shaped screw portion 42 that penetrates the support 1 to fix the horizontal wire 22 between the folded portion 41 and the support 1. The mounting bracket 4 is not limited to this embodiment, and can be, for example, a form in which a locking member such as a hook having a U-shaped vertical section that opens upward is attached to the front surface of the support 1.

[0020] 4 to 8 show the mounting structure of the support 1 to the base plate 3 in FIG. 1, with FIG. 4 being an enlarged view of the main part in the AA cross section of FIG. 3, FIG. 5 being the main part of FIG. 3(a), FIG. 6 being a BB cross section of FIG. 4, FIG. 7 being an explanatory diagram showing the tilted state of the support 1 in FIG. 6, and FIG. 8 being a CC cross section of FIG. 6.

[0021] First, the base plate 3 is generally installed on the ground surface such as the ground or a concrete foundation, and supports the support column 1 elastically so that it can tilt backward, and prevents the support column 1 from tilting forward. The base plate 3 includes a base portion 31 for fixing to the ground surface, a pair of rising portions 32 provided on the left and right sides of the support column 1 facing each other, a receiving portion 33 provided at the rear of the support column 1, and a supporting portion 34 provided at the front of the support column 1, and a storage portion 35 is formed inside by the base portion 31, the rising portions 32, the receiving portions 33, and the supporting portions 34.

[0022] The foundation 31 is for fixing the base plate 3 to the ground surface, and in this embodiment, includes a bottom plate 31a placed on the ground surface and a fixing portion 31b fixed to a foundation K buried in the ground from the back surface of the bottom plate 31a, and a bolt protruding from 31b is passed through a through hole in the bottom plate 31a and a nut is screwed and fastened. The foundation 31 may be any one that can be firmly fixed to the ground surface, and may be, for example, the foundation 31 integrated with the foundation K.

[0023] The rising parts 32 are provided in a pair on the left and right sides of the lower part 11 of the support 1, and support the lower part 11 of the support 1 between the rising parts 32 so that the support 1 can tilt backward. In this embodiment, the bolt B2 penetrates the support 1 from the bolt hole 32a of one rising part 32 to the left and right, passes through the bolt hole 32a of the other rising part 32, and a nut N2 is screwed to the threaded end of the bolt B2. In this way, the support 1 is supported by the bolt B2. The height position of the bolt B2 is not particularly limited, but considering that the support 1 tilts backward when the vehicle collides, it is preferable that the bolt B2 is located lower than the contact part such as the bumper of the vehicle. In addition, the rising parts 32 support the support 1 with a gap between the lower end 12 of the support 1 and the base part 31, so that the lower end 12 of the support 1 does not interfere with the upper surface of the base part 31 when the support 1 tilts backward.

[0024] The receiving portion 33 is provided at the rear of the support pillar 1, and is intended to prevent the upper portion of the support pillar 1 from moving in a direction that tilts forward. That is, in this embodiment, the front surface of the receiving portion 33 is formed with a receiving surface 33a that fits along the back side of the support pillar 1 when the support pillar 1 is erected almost vertically, and it is possible to prevent the support pillar 1 from tilting forward from the vertical state.

[0025] 4, in this embodiment, the pair of rising portions 32 and receiving portion 33 are integrally formed into a U-shaped cross section that opens backward, and a storage portion 35 capable of storing the lower portion 11 of the support pillar 1 is located inside the U-shaped portion. The thickness of the wall portion that forms the storage portion 35 is made thicker than the thickness of the member that forms the support pillar 1. As a result, when a vehicle or the like collides with the support pillar 1 and a large impact force is applied to the support pillar 1, the support pillar 1 is more likely to deform than the storage portion 35, so that during replacement work, only the support pillar 1 needs to be replaced while leaving the base plate 3 intact, which makes the replacement work easier and reduces costs compared to replacing the entire base plate 3.

[0026] The support part 34 is provided in front of the support pillar 1 at a distance, and an elastic member 5 for biasing the lower part 11 of the support pillar 1 backward is disposed between the support part 34 and the support pillar 1. As a result, the support pillar 1 does not easily tilt backward due to the biasing force of the elastic member 5 even with a relatively small impact force such as a person lightly touching the support pillar 1. Also, as shown in FIG. 7, when the support pillar 1 tilts backward in the L direction due to the impact of a person's contact or a vehicle collision from the front of the support pillar 1, the lower part 11 of the support pillar 1 rotates forward about the bolt B2 as an axis and presses the elastic member 5 forward, so that the elastic member 5 contracts and absorbs the impact force as elastic energy. Then, when the person or vehicle leaves the support pillar 1 and the elastic energy absorbed by the elastic member 5 is released and the support pillar 1 rotates in the M direction about the bolt B2 as an axis, the back surface of the lower part 11 of the support pillar 1 abuts against the receiving surface 33a of the receiving part 33, preventing the support pillar 1 from tilting forward. This makes it possible to prevent the support pole 1 from hitting a person or vehicle that is away from the support pole 1 in reaction.

[0027] In this embodiment, the elastic member 5 has coil springs 51, 51 arranged above and below, which are compression coil springs that can be compressed laterally. By using a coil spring instead of a leaf spring, the size of the base plate 3 on which the coil spring 51 is arranged can be reduced, making it possible to reduce the risk of a person tripping or coming into contact with the vehicle body. In addition, when a person or vehicle collides from the front of the support pillar 1, the upper and lower coil springs 51, 51 of the elastic member 5 disperse and absorb the impact energy while the support pillar 1 tilts backward, thereby reducing the degree of backward tilt of the support pillar 1.

[0028] By using a compression spring as the coil spring 51 of the elastic member 5, even if the gap between the lower part 11 of the support 1 and the support part 34 is relatively narrow, a predetermined elasticity (reaction force) can be obtained by using a coil spring 51 with a spring constant corresponding to the gap. Furthermore, the coil spring 51 has advantages in terms of productivity, ease of installation, and replaceability compared to other springs such as leaf springs and spiral springs, and this leads to cost reduction.

[0029] In this embodiment, coil spring 52 is arranged only inside lower coil spring 51. As a result, when a car or the like comes into contact with the fence and the post tilts backward, the lower coil spring is displaced more, so it is in a state of holding a relatively large elastic energy. When the car moves, coil springs 51 and 52 are released and large elastic energy acts on the lower side where the displacement is greater, making it easier for post 1 to return to its original upright state.

[0030] The elastic force of the coil springs 51, 52 can be adjusted by the material diameter, coil diameter, number of coil turns, etc. The coil spring shape shown in Fig. 9 is one example, and the material diameter, coil diameter, number of coil turns, etc. may be changed according to the required elastic force.

[0031] In this embodiment, the coil spring 52 has a larger spring constant. Compared to using coil springs with the same spring constant for the lower coil springs 51 and 52, the coil spring 52 has a larger spring constant and retains a larger elastic energy, so that the coil spring 52 makes it easier for the support column 1 to quickly return to its original upright state.

[0032] In addition, when a load that exceeds the elastic deformation range of one of the coil springs 51, 52 is applied, as long as the load does not exceed the elastic deformation range of the other coil spring, the load can be distributed between the two coil springs to suppress the load on one of the coil springs, suppressing settling of the coil springs and enabling them to be used for a long period of time. Note that a coil spring 52 may also be disposed inside the upper coil spring 51 depending on the required elastic force.

[0033] 6, a spring fixing plate 6 is disposed between the coil springs 51, 52 and the support portion 34. The spring fixing plate 6 has a contact surface 61 against which the front surfaces of the coil springs 51, 52 contact, and a pressing surface 62 on the opposite side thereof that is pressed by the tip of the adjustment screw B3 screwed in from the front of the support portion 34. By screwing the adjustment screw B3 all the way in, the lower portion 11 of the support column 1 is biased backward by the elastic member 5 via the spring fixing plate 6. This allows the degree of biasing of the elastic member 5 against the lower portion 11 of the support column 1 to be adjusted by the screw-in dimension of the adjustment screw B3, and allows the ease of tilting the support column 1 backward when the support column 1 is set up approximately vertically to be adjusted.

[0034] For example, if the fence P is installed in a location facing a pedestrian walkway, the initial biasing force of the elastic member 5 can be increased so that the fence will not easily lean backward even if a person touches the support post 1. Similarly, if the fence P is installed on the boundary of a parking lot, the initial biasing force of the elastic member 5 can be decreased so that a vehicle is less likely to be damaged even if it comes into contact with the support post 1.

[0035] Also, as shown in FIG. 4, in this embodiment, by making the width dimensions of the coil spring 51 and the spring fixing plate 6 slightly shorter than the distance from each side end of the support portion 34 to the opening end of the pillar storage portion 35, it is possible to prevent problems such as the left and right ends of the coil spring 51 and the spring fixing plate 6 shifting in the front-to-rear direction when a biasing force is generated by the coil spring 51.

[0036] As shown in FIG. 8, a spacer 7 is disposed between the coil springs 51, 51 arranged in multiple stages. The coil springs 51 have a spring pitch, and the springs arranged in multiple stages may become entangled due to their own weight and become unable to deform. In addition, as shown in FIG. 7, when the support 1 tilts backward in the L direction due to an impact, the impact force applied to each spring is different, so that the deformation amount of the springs is different. Since the deformation amount also varies when rotating in the M direction, if the coil springs 51, 51 are simply stacked vertically in two stages, the springs may become entangled when a certain deviation occurs in the amount of change. Therefore, in this embodiment, a spacer 7 is disposed to prevent the coil springs from becoming entangled. For example, by adjusting the spring pitch and linearity, it is possible to prevent the upper and lower coil springs 51, 51 from becoming entangled. However, since there is a possibility that the pitch may coincide and entanglement may occur, this embodiment is preferable.

[0037] The base portion 31, the rising portion 32, the receiving portion 33, and the supporting portion 34 constituting the base plate 3 are generally made of steel material which is stable in strength and inexpensive, but may be made of other metals such as stainless steel alloys and aluminum alloys in part or in whole as long as they have the strength to support the support column 1. In this embodiment, the rising portion 32, the receiving portion 33, and the supporting portion 34 are each integrally provided on the base portion 31, but for example, the rising portion 32, the receiving portion 33, and the supporting portion 34 may be made as separate bodies and attached to the base portion 31 via the base portion 31 or another member.

[0038] 10 is an explanatory diagram of the cover member 8 attached to the base plate 3. The cover member 8 is attached to the upper ends of the support parts 34 and the rising parts 32 of the base plate 3, and covers the elastic member 5 arranged below them. The cover member 8 is formed in a lid shape having a top plate 82 and side wall parts 83 that are provided along the outer periphery of the top plate 82 and are arranged outside the upper ends of the left and right rising parts 32 and the support parts 34. The cover member 8 is placed over the support parts 34 and the rising parts 32, and fixing screws B4 are screwed from screw holes 84 provided in the side wall parts 83 toward the upper ends of the left and right rising parts 32 and the support parts 34, to fix the cover member 8 to the base plate 3.

[0039] The tabletop 82 has a notch 81 cut out from the side end face on the column 1 side toward the center so that the column 1 and the tabletop 82 do not interfere with each other when the column 1 is tilted backward.

[0040] The cover material 8 is not limited to the present embodiment as long as the elastic member 5 is not easily visible from the outside and the elastic member 5 is not easily exposed to rainwater.

[0041] 11 is an explanatory diagram of the spacer 7 used in the present invention. The spacer 7 is not limited to this embodiment as long as it can maintain a state in which the upper and lower coil springs 51, 51 are not in contact with each other.

[0042] A rainwater drainage outlet 9 is provided between the bottom plate portion 31a and the support portion 34. The shape of the rainwater drainage outlet 9 is one example, and is not limited to this embodiment as long as the shape allows drainage.

[0043] In this embodiment, the elastic member 5 has coil springs arranged in two rows, one above the other, but it may have three or more rows depending on the shape of the support pillar, the backward tilt angle, etc. For example, Fig. 12(a) shows a modification of the fence P according to the present invention, specifically, it is an explanatory diagram in which the coil springs 51 are arranged in three rows.

[0044] 12(b) is an explanatory diagram in which a coil spring 52 is also arranged inside the upper coil spring 51. The arrangement of the coil springs is just one example, and is not limited to this embodiment as long as the shape allows the support pillar 1 to return to its original upright state. [Explanation of symbols]

[0045] 1 post 11 Lower end 2 Panel body 21 Vertical wire 22 Horizontal wire 3 Base plate 31 Base 32 Rising section 33 Receiving part 34 Support part 35 Storage area 4 Mounting bracket 41 Turn-back section 42 Screw part 5 Elastic member 51 Coil spring 52 Coil spring 6 Spring fixing plate 7 Spacer 8 Covering material 9 Rainwater drain K Foundation P-Fence

Claims

1. A fence having posts mounted on base plates installed at intervals and a panel body attached between the posts, wherein the base plate has a pair of rising portions erected opposite each other on the left and right of the post, a support portion erected in front of the post, and a receiving portion erected at the rear of the post, the lower portion of the post being supported between the rising portions so as to be able to tilt backward, the receiving portion being adapted to prevent the post from tilting forward, and an elastic member being arranged between the lower portion of the post and the support portion for urging the lower portion of the post backward, the elastic member having a plurality of coil springs arranged above and below.

2. 2. The fence according to claim 1, wherein a spacer is disposed between the upper and lower coil springs.

3. 3. The fence according to claim 1, wherein the elastic member comprises a coil spring having a different spring constant arranged inside at least the downward coil spring.

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