Bridge members and hose bridges

Abstract

To provide a bridge member and hose bridge that can protect the surface of a hose from wear and tear. [Solution] A bridge member 21a in a hose bridge 10 that protects the hose 30 when a vehicle Pv passes over the hose 30, comprising a top plate portion 22 and two or more top plate support portions 24 that support the top plate portion 22, wherein a hose insertion passage 32 for passing the hose 30 along a direction Cd intersecting the direction Pd in ​​which the vehicle Pv passes is formed below the top plate portion 22 by the top plate portion 22 and the two or more top plate support portions 24, and a protective layer is formed on at least a part of the inner surface of the hose insertion passage 32 that faces the hose 30 passed through the hose insertion passage 32.

Description

Technical Field

[0001] The present invention relates to a bridge member and a hose bridge including the bridge member.

Background Art

[0002] In recent years, due to the increase in concentrated heavy rain, large-scale floods and water disasters occur every year and are intensifying. The frequency of drainage activities is increasing more and more. Generally, drainage activities are carried out by sending out a drainage pump truck equipped with several drainage hoses to the vicinity of the water discharge location. The operator parks the drainage pump truck on the road such as a river levee, takes out several drainage hoses from the drainage pump truck and extends them, and arranges several drainage hoses side by side on the road so that they cross the road from the water discharge location and drain into the river. During the drainage activity, several drainage hoses inflated by water pressure lie side by side on the road. If a hose bridge is not used during the drainage activity, the passage of emergency vehicles and the like will be blocked by the several drainage hoses arranged side by side.

[0003] On the other hand, the hose bridge includes a bridge member installed so as to cross over the drainage hose. By using the hose bridge, vehicles can pass over the bridge member (above the hose) without stopping the drainage activity, and the weight of the vehicle can be protected from reaching the drainage hose by the bridge member. The hose bridge is not limited to drainage activities, and is also used to protect fire hoses, for example, when firefighters send out a fire pump truck to a fire site and use a fire hose to discharge water.

[0004] Also, Patent Document 1 discloses a hose bridge that protects the hose from the vehicle when the vehicle passes over the hose. This hose bridge includes guide members installed along the traveling direction of the vehicle on both sides of the hose. At least a part of this guide member is formed of a foam, and the compressive stress at 10% deformation of the foam is 272 kN / m 2That concludes the explanation. This hose bridge may further comprise a bridge member having an insertion portion for passing the hose through, and a bridge surface located above the insertion portion on which the vehicle travels. Patent Document 1 describes how this hose bridge offers excellent workability. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2022-60703 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, hoses such as drainage hoses and fire hoses can suddenly and irregularly move or deform in response to changes in water pressure, sometimes causing them to come into strong contact with surrounding components, such as bridge members. This contact can cause wear on the hose surface, leading to a problem where water is more likely to leak from the worn areas.

[0007] Therefore, the object of the present invention is to provide a bridge member and a hose bridge that can protect the surface of the hose from wear. [Means for solving the problem]

[0008] To solve the above problems, a bridge member according to one embodiment is a bridge member in a hose bridge that protects the hose when a vehicle passes over the hose, It comprises a top plate and two or more top plate support parts that support the top plate, A hose insertion passage for passing the hose along a direction intersecting the direction in which the vehicle passes is formed below the top plate portion by the top plate portion and the two or more top plate support portions. A protective layer is formed on at least a portion of the inner surface of the hose insertion passage that faces the hose that passes through the hose insertion passage.

[0009] In such a bridge member, each hose passage is formed to allow a hose to pass through, and the hose passed through the hose passage is surrounded by the top plate portion and the two top plate support portions that constitute each hose passage. As a result, the hose is constrained so as to have its range of motion significantly limited by the hose passage, and when it moves due to changes in water pressure, it is mainly in a state where it can come into contact with the inner surface of the hose passage. Furthermore, since a protective layer is formed on at least a part of the inner surface of the hose passage, even if the hose deforms from a circular cross-sectional shape to a flattened cross-sectional shape in response to a decrease in water pressure and comes into contact with the inner surface of the hose passage, the friction between this inner surface and the hose surface is mitigated by the protective layer, making it easier to avoid wear on the hose surface.

[0010] Furthermore, a hose bridge according to one embodiment may include at least one of the above-described bridge members and at least one ramp member. [Effects of the Invention]

[0011] As described above, the present invention can provide a bridge member and a hose bridge that can protect the surface of a hose from wear. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a side view of a hose bridge according to one embodiment. [Figure 2] Figure 2 is a front view of a hose bridge in an example where two hose bridges according to one embodiment are used side by side. [Figure 3] Figure 3 is a side view showing an example of the use of a hose bridge according to one embodiment. [Figure 4] Figure 4 is a side view of a bridge member according to one embodiment. [Figure 5] Figure 5 is a side view showing an example of how two bridge members according to one embodiment are stored in a compact form when the hose bridge is not in use. [Figure 6] Figure 6 is a side view of a bridge member according to another embodiment. [Figure 7] Figure 7 is a side view of a bridge member according to yet another embodiment. [Modes for carrying out the invention]

[0013] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Components common to each figure are denoted by the same reference numerals. The size, dimensions, and positional relationships of the illustrated components are illustrative only and are not limited to those shown.

[0014] As shown in Figures 1 to 3, a hose bridge 10 according to one embodiment includes at least one bridge member 20 and at least one slope member 40. Figure 1 shows an example in which the hose bridge 10 includes one bridge member (first bridge member 21a) as at least one bridge member 20, and two slope members (first slope member 41a and second slope member 41b) as at least one slope member 40. Figure 3 shows an example in which the hose bridge 10 includes three bridge members (first bridge member 21a, second bridge member 21b and third bridge member 21c) as at least one bridge member 20, and two slope members (first slope member 41a and second slope member 41b) as at least one slope member 40.

[0015] Each bridge member (for example, the first bridge member 21a) is installed and used so as to straddle at least one hose 30 on the ground Gr (for example, a road) where at least one hose 30 lies. By installing and using it in this manner, as illustrated in Figure 3, the bridge member (for example, the first bridge member 21a) can protect at least one hose 30 when a vehicle Pv passes over it.

[0016] Each bridge member includes a top plate portion 22 and two or more top plate support portions 24 that support the top plate portion 22. For example, the first bridge member 21a illustrated in FIG. 4 includes a top plate portion 22 and three top plate support portions (a first top plate support portion 25a, a second top plate support portion 25b, and a third top plate support portion 25c). The upper surface 23 of the top plate portion 22 can function as a portion for allowing the vehicle Pv (FIG. 3) to pass therethrough. In FIG. 3, an example in which the vehicle Pv passes in a specific one direction (a direction from the ground Gr on the right side of the drawing sheet toward the ground Gr on the left side of the drawing sheet) is shown, but the vehicle Pv can also pass in the reverse direction (a direction from the ground Gr on the left side of the drawing sheet toward the ground Gr on the right side of the drawing sheet). That is, the passing direction Pd of the vehicle Pv includes a direction along a certain one direction and a direction along the reverse direction thereof. As illustrated in FIG. 4, in the first bridge member 21a, since one top plate portion 22 is supported by three top plate support portions, namely, the first top plate support portion 25a, the second top plate support portion 25b, and the third top plate support portion 25c, the interval (strut pitch) between adjacent top plate support portions (for example, the first top plate support portion 25a and the second top plate support portion 25b) can be designed to be narrow, and there is an advantage that even if the top plate portion 22 is thinned and lightened, it is easy to obtain strength enough to withstand the weight of the vehicle Pv.

[0017] In each bridge member, the top plate portion 22 and two or more top plate support portions 24 form at least one hose insertion passage 32 (Figure 4) along the intersecting direction Cd (Figure 2) which intersects the passage direction Pd through which the vehicle Pv (Figure 3) passes. As shown in Figure 4, each hose insertion passage included in the at least one hose insertion passage 32 is formed to accommodate at least one hose 30, with the top plate portion 22 as the ceiling and adjacent top plate support portions among the two or more top plate support portions 24 as side walls. For example, in the first bridge member 21a illustrated in Figure 4, the top plate portion 22 and three top plate support portions (first top plate support portion 25a, second top plate support portion 25b, and third top plate support portion 25c) form two hose insertion passages (first hose insertion passage 33a and second hose insertion passage 33b). The first hose insertion passage 33a is formed so as to accommodate one hose (the first hose 31a) by using the lower surface 34 of the top plate portion 22 as the ceiling surface of the insertion passage, and the side wall surfaces (35a, 35b1) of the adjacent first top plate support portion 25a and second top plate support portion 25b as the inner wall surfaces on both sides of the insertion passage. In other words, the first hose insertion passage 33a can also be described as a passage formed below the top plate portion 22 by the top plate portion 22, the first top plate support portion 25a, and the second top plate support portion 25b in order to allow the first hose 31a to pass along the direction Cd that intersects the direction Pd through which the vehicle Pv passes. The second hose insertion passage 33b is formed so as to accommodate one hose (second hose 31b) by using the lower surface 34 of the top plate portion 22 as the ceiling surface of the insertion passage, and the side walls (35b2, 35c1) of the adjacent second top plate support portion 25b and third top plate support portion 25c as the inner walls on both sides of the insertion passage. In other words, the second hose insertion passage 33b can also be described as a passage formed below the top plate portion 22 by the top plate portion 22, the second top plate support portion 25b, and the third top plate support portion 25c in order to allow the second hose 31b to pass along the direction Cd that intersects the direction Pd through which the vehicle Pv passes.

[0018] Figure 2 illustrates a case where the intersecting direction Cd, which intersects the direction of passage Pd through which the vehicle Pv (Figure 3) passes, is perpendicular to the direction of passage Pd (intersecting at a 90° angle). In other words, in the example shown in Figure 2, the first hose 31a and the second hose 31b are arranged side by side so as to extend along the intersecting direction Cd which is perpendicular to the direction of passage Pd (intersecting at a 90° angle), and the first hose insertion passage 33a and the second hose insertion passage 33b (Figure 4), which are hidden and not shown below the top plate portion 22 (at the back of the page in Figure 2), are also formed along this intersecting direction Cd. Each top plate support portion may be a plate-like body with its longer side in the direction along the intersecting direction Cd. Not limited to the example shown in Figure 2, at least one hose insertion passage 32 may be formed along a direction that intersects the direction of passage Pd of the vehicle Pv at any angle. The arbitrary angle here can be, for example, 45° to 135°, 60° to 120°, or 75° to 105°.

[0019] The inner surface of each hose insertion passage (for example, the first hose insertion passage 33a in the first bridge member 21a shown in FIG. 4) is composed of the ceiling surface of the insertion passage (the lower surface 34 of the top plate portion 22) and the inner wall surfaces on both sides of the insertion passage (the opposing side wall surfaces of adjacent top plate support portions (for example, the side wall surface 35a of the first top plate support portion 25a and the side wall surface 35b1 of the second top plate support portion 25b)). In each hose insertion passage (for example, the first hose insertion passage 33a), a protective layer is formed on at least a part of the inner surface of the hose insertion passage facing the hose (for example, the first hose 31a) passed through the hose insertion passage. The protective layer may be a layer containing a synthetic resin having microelasticity or elasticity, such as, for example, vinyl acetate resin, acrylic resin, silicone resin, acrylic silicone resin, fluororesin, urethane resin, styrene resin, or crosslinking reaction type resin (see, for example, JIS A 6909 (2003)). In the protective layer, the content of one kind of synthetic resin selected from the group consisting of vinyl acetate resin, acrylic resin, silicone resin, acrylic silicone resin, fluororesin, urethane resin, styrene resin, and crosslinking reaction type resin or the total content of two or more kinds of synthetic resins may be, for example, more than 50% by mass, may be 70% by mass or more, and preferably 90% by mass or more. The protective layer may be formed intermittently or continuously on at least a part of the inner surface of each hose insertion passage (for example, the first hose insertion passage 33a, etc.), but it is preferably formed over the entire area of the inner wall surfaces on both sides of the insertion passage (for example, the side wall surface 35a of the first top plate support portion 25a and the side wall surface 35b1 of the second top plate support portion 25b), and more preferably formed over the entire area of the inner wall surfaces on both sides and the ceiling surface (the lower surface 34 of the top plate portion 22) of the insertion passage.

[0020] The protective layer may be, for example, a sheet-like material containing at least one synthetic resin selected from the group consisting of vinyl acetate resin, acrylic resin, silicone resin, acrylic silicone resin, fluororesin, urethane resin, styrene resin, and crosslinking reaction type resin, which is attached to at least a portion of the inner surface of the hose insertion passage. As long as it does not contradict the object of the present invention, a smooth outermost layer, such as a wax layer, may be provided on the surface of the protective layer, and the protective layer may be configured to indirectly contact at least one hose 30 with this smooth outermost layer in between when at least one hose 30 moves. From the viewpoint of further suppressing wear on the hose surface, it is preferable that the protective layer is exposed over at least a portion (more preferably the entire area) of the inner surface of each hose insertion passage, and that the protective layer is configured to directly contact at least one hose 30 when at least one hose 30 moves.

[0021] Preferably, the protective layer is a coating formed by applying elastic paint to at least a portion (more preferably the entire surface) of the inner surface of each hose insertion passage. In other words, in each hose insertion passage, it is preferable that a coating derived from elastic paint is formed as the protective layer on at least a portion (more preferably the entire surface) of the inner surface. For example, in the first bridge member 21a shown in Figure 4, it is preferable that a coating derived from elastic paint is formed as the protective layer on at least a portion of the ceiling surface (lower surface 34 of the top plate portion 22) and both inner wall surfaces (side wall surfaces 35a and 35b1) of the first hose insertion passage 33a. Also, it is preferable that a coating derived from elastic paint is formed as the protective layer on at least a portion of the ceiling surface (lower surface 34 of the top plate portion 22) and both inner wall surfaces (side wall surfaces 35b2 and 35c1) of the second hose insertion passage 33b. The coating derived from elastic paint may be a single layer or a multi-layer coating including a topcoat layer.

[0022] A typical elastic paint is a paint that can form a coating film with relatively high elasticity (stretchability), which can be used in fields such as exterior wall painting. In this specification, elastic paints can be those that have a synthetic resin emulsion and can form a coating film that is elastic or slightly elastic. For example, as an elastic paint, a paint containing a synthetic resin emulsion with one or more selected from the group consisting of vinyl acetate resin, acrylic resin, silicone resin, acrylic silicone resin, fluororesin, urethane resin, styrene resin, and crosslinking reaction type resin may be used. Note that urethane resin is a polymer having urethane bonds, produced, for example, by polyaddition of a compound having an isocyanate group and a compound having a hydroxyl group, and is also called polyurethane or urethane rubber. Acrylic silicone resin is a resin prepared from (meth)acrylic resin and a silicone compound containing silanol groups or alkoxy groups; in other words, it is a silicone resin containing (meth)acrylic resin. "(meth)acrylic" means at least one of acrylic and methacrylic. (Meth)acrylic resin is a polymer of one or more compounds selected from the group consisting of acrylic acid, acrylic acid esters, methacrylic acid, and methacrylic acid esters. As an elastic coating, it is preferable to use a coating made of a synthetic resin emulsion containing at least one of urethane resin and acrylic silicone resin. An example of a coating made of a synthetic resin emulsion containing acrylic silicone resin is "Silicontex" manufactured by Kansai Paint Co., Ltd.

[0023] As the elastic coating, any of the waterproof exterior thin coating material E, waterproof multi-layer coating material E, waterproof multi-layer coating material CE, waterproof multi-layer coating material RE, and waterproof multi-layer coating material RS specified in JIS A 6909 (2003) may be used, or a coating that meets the same standards as these coating materials in terms of the results of the elongation test and deterioration test under elongation specified in JIS A 6909 (2003) may be used. In this specification, the elastic coating is preferably a coating that has an elongation test result of 20% or more at 20°C in accordance with JIS A 6909 (2003). For example, as the elastic coating, it is preferable to use a coating that has an elongation test result of 50% or more and less than 120% at 20°C in accordance with JIS A 6909 (2003), and it is even more preferable to use a coating that has an elongation test result of 120% or more.

[0024] In addition to the synthetic resins mentioned above, the elastic coating before application may also contain, as needed, pigments, water, organic solvents, drying agents, antioxidants, reaction catalysts, dispersants, defoamers, dehydrators, leveling agents, anti-settling agents, anti-sagging agents, silane coupling agents, antifungal agents, preservatives, UV absorbers, or radical scavengers. The coating film derived from the elastic coating may contain the same components as the elastic coating, except for water and organic solvents that vaporize during the coating film formation process.

[0025] When other members (e.g., ramp members or other bridge members) are arranged adjacent to individual bridge members, each bridge member may be provided with engaging portions at both ends in the direction Pd through which a vehicle Pv passes, which function to engage with other adjacent members. For example, in the example shown in Figure 1, the outer wall surface 29a of the first top plate support 25a and the outer wall surface 29c of the third top plate support 25c correspond to both ends in the direction Pd through which a vehicle Pv passes on the first bridge member 21a. Although not shown, these outer wall surfaces (29a, 29c) may be provided with, for example, a grooved or hook-and-loop fastener of a certain size or larger that can function as an engaging portion.

[0026] Alternatively, from the viewpoint of improving durability, space-saving, ease of transport when mounted on a pump truck, etc., and ease of carrying and installation for workers, it is preferable that the ends of the passage direction Pd through which the vehicle Pv passes do not have engaging parts for engaging the bridge member with the ramp member. From a similar viewpoint, it is even more preferable that the ends of the passage direction Pd of each bridge member do not have engaging parts for engaging with other members (e.g., other bridge members), not just ramp members. For example, in the example shown in Figure 1, the outer wall surfaces (29a and 29c) corresponding to the aforementioned ends are flat surfaces along the height direction Vd, and therefore do not function as engaging parts. The ends of the passage direction Pd of each bridge member may have shapes such as small recesses, protrusions, or through holes along the passage direction Pd that do not function as engaging parts, but it is preferable that they do not have through holes and are flat surfaces along the height direction Vd, as illustrated by the outer wall surfaces (29a and 29c) in Figure 4. The configuration without engaging parts at both ends allows for quick assembly when combining at least one bridge member 20 and at least one slope member 40 to construct the hose bridge 10, which is preferable. Also, as shown in Figure 3, when a vehicle Pv travels in the direction of passage Pd, at least one bridge member 20 has at least one hose 30 inserted into at least one hose insertion passage 32, so its position is somewhat fixed by at least one hose 30. For this reason, for example, in the hose bridge 10 shown in Figure 1, the first bridge member 21a does not have engaging parts at both ends in the direction of passage Pd (it has a flat surface along the height direction Vd), but even when the weight of the vehicle Pv is applied, displacement of the first bridge member 21a is unlikely to occur in the direction of passage Pd or the crossing direction Cd. Furthermore, even if pressure (for example, distributed weight from the vehicle Pv) is applied in the direction along the crossing direction Cd, the configuration without engaging parts at both ends prevents damage such as shearing of the engaging parts.

[0027] From a similar viewpoint to that of the engagement portion described above, it is preferable that the ends of each bridge member (for example, the first bridge member 21a shown in Figure 4) in the direction Pd of vehicle Pv (for example, the outer wall surface 29a and the outer wall surface 29c) are configured in such a way that it is not possible to attach connectors (for example, screws, etc.) for connecting and fixing them to other members (for example, other bridge members or slope members). For this reason, it is preferable that the first bridge member 21a does not have recesses (for example, screw holes) or protrusions into which connectors are fitted at both ends (outer wall surface 29a and the outer wall surface 29c) in the direction Pd of vehicle Pv.

[0028] On the upper surface 23 of the top plate portion 22 of each bridge member (for example, the first bridge member 21a), both ends in the direction Pd through which the vehicle Pv passes can be said to be edge portions (27a, 27c) that form the boundary between the upper surface 23 of the top plate portion 22 and the aforementioned outer wall surface (for example, outer wall surface 29a and outer wall surface 29c). It is preferable that these edge portions (27a, 27c) are rounded. When the edge portions (27a, 27c) are rounded, it is preferable from the viewpoint that the vehicle Pv can easily travel from the slope members to the upper surface 23 of the top plate portion 22 of the bridge member, even if the slope members (for example, the first slope member 41a and the second slope member 41b) described later are compressed somewhat in the height direction Vd by the weight of the vehicle Pv as the vehicle Pv passes through in the direction Pd.

[0029] In each bridge member (for example, the first bridge member 21a shown in Figure 4), the top plate portion 22 may be made of a metal plate. Examples of metal plates include steel plates or aluminum plates. Furthermore, two or more top plate support portions 24 may be metal plates that are detachably attached to the lower surface 34 of the top plate portion 22, but from the viewpoint of weight reduction, they may also be sandwich panels in which a fiber-reinforced plastic panel is attached to the surface of a foam core and is detachably attached to the lower surface 34 of the top plate portion 22. However, if the top plate portion 22 is made of a metal plate, it is heavy and difficult for workers to carry. Also, if the top plate portion 22 and two or more top plate support portions 24 are detachably attached, when installing the hose bridge 10, workers will have to go through the trouble of connecting the top plate portion 22 and two or more top plate support portions 24.

[0030] Therefore, from the viewpoint of being lightweight and having high strength, it is preferable that the top plate portion 22 and two or more top plate support portions 24 of each bridge member (for example, the first bridge member 21a shown in Figure 4) are made of fiber-reinforced plastic (hereinafter also referred to as "FRP"). Furthermore, from the viewpoint of being easy to carry and reducing the effort of assembly when installing the hose bridge 10, it is preferable that the top plate portion 22 and two or more top plate support portions 24 of each bridge member are integrated. From these viewpoints, it is even more preferable that the top plate portion 22 and two or more top plate support portions 24 of each bridge member are made of FRP and integrated. In addition, since the surface portion of FRP is made of plastic (matrix resin), it has high affinity with the elastic paint mentioned above, and is also preferable from the viewpoint that the coating film derived from the elastic paint is less likely to peel off from the inner surface of each hose insertion passage. For the same reason, it is even more preferable that both the matrix resin of the FRP constituting the top plate portion 22 and two or more top plate support portions 24 and the synthetic resin contained in the protective layer (for example, the coating film derived from the elastic paint) are of the same type. For example, it is even more preferable that both are made of urethane resin.

[0031] Examples of FRPs include aramid fiber reinforced plastic (AFRP), glass fiber reinforced plastic (GFRP), and carbon fiber reinforced plastic (CFRP). While all of these FRPs are excellent in terms of lightness, strength, and durability, GFRP is preferable as the FRP because it is also excellent in weather resistance and is less expensive than CFRP. Examples of plastics (matrix resins) in FRPs include phenolic resin, epoxy resin, or urethane resin. As the matrix resin for FRPs, urethane resin is preferred from the viewpoint of being soft like rubber and having excellent tensile strength, abrasion resistance, elasticity, and oil resistance, and urethane resin foam is more preferable. An example of a suitable GFRP is "Eslon Neo Lumber FFU," a product manufactured by Sekisui Chemical Co., Ltd., which contains approximately 40% by mass of glass fibers and approximately 60% by mass of urethane resin foam. Note that "Eslon" and "Neo Lumber" are registered trademarks.

[0032] When the top plate portion 22 and two or more top plate support portions 24 are constructed from FRP and integrated, the bridge member is more likely to meet the strength requirements for repeated passage by emergency vehicles. For example, when the inventors of the present invention prototyped a bridge member made of GFRP (Eslon Neo Lumber FFU) in which the top plate portion and three top plate support portions were integrated, as illustrated in Figure 4, the prototype bridge member was able to withstand a compressive strength equivalent to a T-14 load (total vehicle weight of 14 tons, single rear wheel load of 56 kN, tire contact area of ​​200 mm x 500 mm).

[0033] As described above, when the top plate portion 22 and two or more top plate support portions 24 are integrated, it is preferable from the viewpoint that when the hose bridge 10 is not in use, the two bridge members (21a, 21b) can be combined to create a compact external form for storage and transport, as illustrated in Figure 5. In Figure 5, the second bridge member 21b is a member configured in the same way as the first bridge member 21a. In the example shown in Figure 5, the second bridge member 21b is inverted, the third top plate support portion 25c of the second bridge member 21b is placed inside the first hose insertion passage 33a of the first bridge member 21a, and the second top plate support portion 25b of the second bridge member 21b is placed inside the second hose insertion passage 33b of the first bridge member 21a, thereby creating a compact external form for the two bridge members (21a, 21b). The hose bridge 10 can be transported and used together with multiple hoses in a pump truck, such as a drainage pump truck or a fire pump truck. Thus, if two or more bridge components can be stored and transported in a compact form, they will not take up much of the limited mounting space inside the pump truck. This is expected to have the advantage of allowing more bridge components to be mounted in the limited mounting space inside the pump truck, and also the advantage of not having to reduce the amount of other equipment mounted inside the truck in order to make space for the bridge components.

[0034] The upper surface 23 of the top plate portion 22 of each bridge member may be, for example, a flat surface, or it may be provided with an anti-slip surface (not shown). This anti-slip surface may be formed in a shape that makes the upper surface 23 uneven when the top plate portion 22 is molded, or it may be a coating made by applying and curing a thermosetting resin to the upper surface 23. Preferably, this thermosetting resin coating is a composition containing granular material, and is formed so that a part of the granular material is exposed on the surface of the coating. The top plate portion 22 may have at least one through hole along the height direction Vd so that rainwater, etc., can flow down from the upper surface 23 of the top plate portion 22 through the lower surface 34 and the hose insertion passage to the ground Gr. Alternatively, from the viewpoint of improving the strength of the top plate portion 22, it is preferable that the top plate portion 22 does not have a through hole. From the viewpoint of improving visibility at night, it is preferable that at least a part of the upper surface 23 of the top plate portion 22 has a coating made of fluorescent paint or that a reflective member is attached. Examples of reflective materials include reflective tape or reflective plates.

[0035] Preferably, an inclined portion 28 is formed on the upper surface 23 of the top plate portion 22 such that both ends (for example, the edge portions 27a and 27c shown in Figure 4) in the direction Pd through which the vehicle Pv passes are positioned lower than the central portion 26 of the upper surface 23. If an inclined portion 28 is formed, there is an advantage that when the tires of the vehicle Pv are placed on the inclined portion 28, the bridge member, which bears the weight of the vehicle Pv, is less likely to bounce or shift position. Furthermore, if the vehicle Pv is a large vehicle such as a truck and there is a step between the bridge member and the adjacent ramp member, the presence of an inclined portion 28 on the upper surface 23 of the top plate portion 22 makes it easier for the driver of the large vehicle to visually confirm the boundary between the ramp member and the bridge member from the driver's seat, and the impact on the driver from below when the vehicle Pv passes over this boundary is somewhat mitigated, thus providing a sense of security. Furthermore, since both ends of the bridge member are prone to cracking (hairline cracks, etc.) due to stress concentration, if the top plate 22 is made of metal, there is a problem that corrosion inside the metal plate tends to progress through cracks that occur at both ends, or if the top plate 22 is made of anisotropic FRP, there is a problem that cracks tend to progress from both ends. However, if an inclined portion 28 is formed on the upper surface 23 of the top plate 22, the stress of the weight applied to the bridge member from the vehicle Pv via the inclined portion 28 is easily distributed by the inclined portion 28, which has the advantage of making it easier to prevent cracking at both ends.

[0036] From the viewpoint of avoiding wear on the hose surface due to contact between hoses, it is preferable that each bridge member be installed so as to straddle at least one hose 30 (for example, two or more hoses) so that one hose is housed in each hose insertion passage. For example, it is preferable that the first bridge member 21a illustrated in Figure 4 is installed so that one first hose 31a is housed in the first hose insertion passage 33a and one second hose 31b is housed in the second hose insertion passage 33b. From a similar viewpoint, for example, it is also possible to avoid housing two or more hoses in each hose insertion passage. Each hose insertion passage may be used to house, for example, one hose along with a thin power cable.

[0037] At least one hose 30 may be, for example, a single hose. On the other hand, in general, at drainage sites, two or more hoses are used side by side to cross the road, and due to changes in water pressure associated with valve operation, each hose may suddenly move irregularly, and the moving hoses may collide with each other. Also, due to a decrease in water pressure, the cross-sectional shape of the hose deforms from a circular shape to a flattened ellipse, and this deformation may cause adjacent hoses among the two or more hoses to remain in strong contact. Due to these factors, conventionally, at drainage sites, the surface of each hose would wear down and break, making it prone to water leakage. There was also a risk of workers tripping and falling due to two or more hoses moving irregularly. From the viewpoint of resolving these problems and dangers, it is preferable that at least one hose 30 protected in each bridge member be two or more hoses. In other words, it can be said that each bridge member preferably takes the form of a bridge member in a hose bridge that protects two or more hoses when a vehicle Pv passes over them, as illustrated in Figures 1 to 4. For the same reason, in the case of such a bridge member, as illustrated in Figures 1 to 4, it can be said that the two or more top plate support parts 24 are preferably three or more top plate support parts, and the at least one hose insertion passage 32 is preferably two or more hose insertion passages.

[0038] The use of each hose in at least one hose 30 (for example, the first hose 31a and the second hose 31b shown in Figure 4) is not particularly limited as long as it does not contradict the objectives of the present invention. The use of each hose may be, for example, drainage, firefighting, industrial, agricultural, construction, or horticultural, and is preferably for drainage or firefighting, and more preferably for drainage. The size of each hose is not particularly limited as long as it does not contradict the objectives of the present invention, and a suitable size may be appropriately selected and used according to the use of each hose. For example, a hose with a diameter Hd of φ200 mm when filled with water and having a circular cross-section may be used.

[0039] The diameter of each hose in at least one hose 30 (for example, the first hose 31a and the second hose 31b shown in Figure 4) is not particularly limited as long as it does not contradict the purpose of the present invention, as long as it is a size that can accommodate at least one hose in each hose insertion passage when the hose is full of water and the hose has a circular cross-section. If each hose is thick, a larger bridge member can be used so that one thick hose can be accommodated in each hose insertion passage. Alternatively, if each hose is thin, a smaller bridge member can be used so that one thin hose can be accommodated in each hose insertion passage. As shown in Figure 4, the ratio of the diameter Hd of the hose (for example, the first hose 31a) to the passage width Rw of the hose insertion passage (for example, the first hose insertion passage 33a) (hose diameter Hd / passage width Rw of the hose insertion passage) may be, for example, 0.5 or more, 0.6 or more, or 0.7 or more. From the viewpoint of facilitating the installation of individual bridge members so as to straddle at least one hose 30, this ratio (hose diameter Hd / hose insertion passage width Rw) may be, for example, 0.95 or less, 0.9 or less, or 0.8 or less. The value of this ratio (hose diameter Hd / hose insertion passage width Rw) may differ for each hose insertion passage, but from the viewpoint of facilitating the installation of individual bridge members so as to straddle two or more hoses arranged side by side, it is preferable that the value of this ratio is the same. The hose diameter Hd is the diameter of the hose when the hose is full of water and the hose has a circular cross-section. The hose insertion passage width Rw is the width in the direction Pd of vehicle Pv passage in each hose insertion passage. If the length of the width of the hose insertion passage changes along the intersecting direction Cd, the minimum width along the direction Pd of passage at the height passing through the hose central axis Hc in a hose with a circular cross-section is taken as the hose insertion passage width Rw.

[0040] As shown in Figure 4, the ratio of the diameter Hd of the hose (e.g., the first hose 31a) to the passage height Rh of the hose insertion passage (e.g., the first hose insertion passage 33a) (hose diameter Hd / passage height Rh of the hose insertion passage) may be, for example, 0.5 or more, 0.6 or more, or 0.7 or more. From the viewpoint of making it easy to install individual bridge members so as to straddle at least one hose 30, this ratio (hose diameter Hd / passage height Rh of the hose insertion passage) may be, for example, 0.95 or less, 0.9 or less, or 0.8 or less. The value of this ratio (hose diameter Hd / passage height Rh of the hose insertion passage) may differ for each hose insertion passage, but from the viewpoint of making it easy to install individual bridge members so as to straddle at least one hose 30, it is preferable that the value of this ratio is the same. The height Rh of the hose insertion passage is the length of the height direction Vd perpendicular to the vehicle Pv passage direction Pd in ​​each hose insertion passage. If the length of the hose insertion passage in the height direction Vd changes along the intersecting direction Cd, the height Rh of the hose insertion passage is defined as the minimum height of the central part in the passage direction Pd on the ceiling surface (lower surface 34 of the top plate portion 22) of each hose insertion passage.

[0041] In the example shown in Figure 2, at least one hose 30 is positioned perpendicular to the direction of passage Pd of the vehicle Pv (Figure 3). Therefore, the width of the top plate portion 22 in the intersecting direction Cd corresponds to the passage length Rl of each hose insertion passage (for example, the first hose insertion passage 33a and the second hose insertion passage 33b). The ratio of the passage length Rl of the hose insertion passage to the diameter Hd of the hose with a circular cross-section when full of water (for example, the first hose 31a shown in Figure 4) (passage length Rl of the hose insertion passage / diameter Hd of the hose) is not particularly limited as long as it does not contradict the purpose of the present invention, and can be appropriately designed according to the site conditions where the bridge member is expected to be used. From the viewpoint of easily significantly limiting the range of motion of irregularly moving hoses, it is desirable that the value of this ratio (passage length Rl of the hose insertion passage / diameter Hd of the hose) is not too small, and from the viewpoint of being easy to store and transport in a compact external form, it is desirable that the value is not too large.

[0042] Alternatively, although not shown in the diagram, at least one hose insertion passage 32 may be configured so that multiple hoses can be passed through one hose insertion passage (for example, the first hose insertion passage 33a). In this configuration, it is preferable that the size of the hose insertion passage is designed such that the ratio of the diameter Hd of each hose when the passage is full of water and has a circular cross-section to the passage width Rw of the hose insertion passage (passage width Rw of the hose insertion passage / diameter Hd of each hose) is less than 0.5.

[0043] As described above, the bridge member (for example, the first bridge member 21a) is formed so that each hose insertion passage can accommodate at least one hose 30. For example, the first hose insertion passage 33a can accommodate one first hose 31a, and the second hose insertion passage 33b can accommodate one second hose 31b. Therefore, each hose (for example, the first hose 31a) is surrounded by the ceiling surface (the lower surface 34 of the top plate portion 22) and the inner wall surfaces on both sides (for example, the side wall surface 35a of the first top plate support portion 25a and the side wall surface 35b1 of the second top plate support portion 25b) that constitute each hose insertion passage (for example, the first hose insertion passage 33a), limiting its range of motion and making it difficult to move. For workers, the risk of tripping and falling due to the hose moving irregularly and significantly is reduced, making it safer. For the same reason, even if each hose deforms in response to changes in water pressure, contact between the hoses is prevented by the inner surface of each hose insertion passage, thus avoiding wear on the hose surfaces due to contact between hoses. Furthermore, since a protective layer is formed on at least a portion of the inner surface of each hose insertion passage, even if each hose deforms from a circular cross-section to a flattened cross-sectional shape in response to a decrease in water pressure and comes into contact with the inner surface, the friction between the inner surface and the hose surface is mitigated by the protective layer, thus avoiding wear on the hose surfaces.

[0044] When installing the hose bridge 10, if necessary, at least one bridge member 20 may be just one bridge member (first bridge member 21a) as illustrated in Figure 1, or two or more bridge members may be used. Figure 3 illustrates a case where three bridge members (first bridge member 21a, second bridge member 21b, and third bridge member 21c) are installed side by side. The second bridge member 21b and the third bridge member 21c may be configured in the same way as the first bridge member 21a, or they may be configured in a way that changes the number of top plate supports or the number of hose insertion passages compared to the first bridge member 21a, as shown in the fourth bridge member 21d or fifth bridge member 21e described below.

[0045] As shown in Figure 6, the fourth bridge member 21d comprises a top plate portion 22 and four top plate support portions (first top plate support portion 25a, second top plate support portion 25b, third top plate support portion 25c, and fourth top plate support portion 25d). In the fourth bridge member 21d, the top plate portion 22 and the four top plate support portions form three hose insertion passages (first hose insertion passage 33a, second hose insertion passage 33b, and third hose insertion passage 33c) along the intersecting direction Cd which intersects with the passage direction Pd through which the vehicle Pv passes. The third hose insertion passage 33c is formed to accommodate at least one hose 30 (for example, one third hose 31c) by using the lower surface 34 of the top plate portion 22 as the ceiling surface of the insertion passage, and the opposing side wall surfaces 35c2 and 35d of the adjacent third top plate support portion 25c and fourth top plate support portion 25d as the inner wall surfaces on both sides of the insertion passage. In the fourth bridge member 21d, both ends in the direction of passage Pd through which the vehicle Pv passes are the outer wall surface 29a of the first top plate support portion 25a and the outer wall surface 29d of the fourth top plate support portion 25d. These outer wall surfaces (29a and 29d) are flat surfaces along the height direction Vd. Other matters concerning the fourth bridge member 21d are the same as those concerning the first bridge member 21a described above, and the same explanation will not be repeated.

[0046] As shown in Figure 7, the fifth bridge member 21e comprises a top plate portion 22 and two top plate support portions (a first top plate support portion 25a and a second top plate support portion 25b). In the fifth bridge member 21e, the top plate portion 22 and the two top plate support portions form a hose insertion passage (first hose insertion passage 33a) along the intersecting direction Cd that intersects with the passage direction Pd through which the vehicle Pv passes. In the fifth bridge member 21e, both ends in the passage direction Pd through which the vehicle Pv passes are the outer wall surface 29a of the first top plate support portion 25a and the outer wall surface 29b of the second top plate support portion 25b. These outer wall surfaces (29a and 29b) are flat surfaces along the height direction Vd. Other aspects of the fifth bridge member 21e are the same as those of the first bridge member 21a described above, and the same explanation will not be repeated.

[0047] Each bridge member is not limited to being configured in the same manner as the first bridge member 21a illustrated in Figure 4, the fourth bridge member 21d illustrated in Figure 6, or the fifth bridge member 21e illustrated in Figure 7. In other embodiments not shown, each bridge member may be configured, for example, with one top plate and n or more top plate support parts that support this top plate, where n is a natural number of 2 or more. In this case, each bridge member may have (n-1) hose insertion passages formed by the top plate and the n or more top plate support parts along the intersecting direction that intersects the direction of passage through which the vehicle passes. In this case, each hose insertion passage included in the (n-1) hose insertion passages may be formed so as to accommodate at least one hose (for example, one hose) with the top plate as the ceiling and two adjacent top plate support parts among the n top plate support parts as side walls. Here, n is preferably a natural number of 3 or more, and more preferably a natural number of 4 or more, from the viewpoint of efficiently bundling and protecting multiple hoses used in parallel. Here, n may be a natural number of 5 or less, for example, from the viewpoint of workability when installing the bridge member so as to straddle the (n-1) hoses in parallel. Other matters concerning the individual bridge members in the further embodiments listed here are configured in the same way as the first bridge member 21a described above, and the same description will not be repeated.

[0048] The individual slope members (for example, the first slope member 41a and the second slope member 41b) of the at least one slope member 40 included in the hose bridge 10 illustrated in Figures 1 to 3 are members that eliminate the step difference between the ground Gr and the upper surface 23 of the top plate portion 22 of the individual bridge member (for example, the first bridge member 21a) when a vehicle Pv is about to pass in the direction of passage Pd, thereby facilitating the passage of the vehicle Pv. In Figures 1 to 3, a configuration is illustrated in which each slope member can be divided into three partial blocks (lower slope block 43, middle slope block 44, and upper slope block 45) from the viewpoint of being lightweight, easy to carry, and easy to adjust the height of the slope according to the condition of the ground Gr. The example is not limited to this, and each slope member may be integrally molded or may be formed to be divisible into two or more partial blocks.

[0049] Each slope member (for example, the first slope member 41a and the second slope member 41b) comprises an inclined surface portion 42 over which a vehicle Pv passes so as to ascend or descend the slope along the direction of passage Pd, and a slope body 46 that supports the inclined surface portion 42. The inclined surface portion 42 may be, for example, a plate-like body detachably configured on the upper surface of the slope body 46, but from the viewpoint of ease of transport, it is preferable that it be a coating integrated with the slope body 46 so as to form the upper surface of the slope body 46. If the inclined surface portion 42 is a plate-like body, it may be, for example, a metal plate such as a steel plate or an aluminum plate, a synthetic resin plate such as a rubber plate or a resin plate, or a fiber-reinforced plastic plate such as GFRP or CFRP as described above. If the inclined surface portion 42 is a coating, it may be a synthetic resin coating such as rubber or a thermosetting resin, or a sheet-like material made of fiber-reinforced plastic such as GFRP or CFRP. From the viewpoint of being lightweight and easy to carry, the material of the inclined surface portion 42 is preferably a synthetic resin coating or fiber-reinforced plastic, and from the viewpoint of being inexpensive, it is even more preferably a synthetic resin coating. The upper surface of the inclined surface portion 42 may be an inclined surface without irregularities, but it is preferable that it be an inclined surface with anti-slip irregularities. For this purpose, it is preferable that the inclined surface portion 42 is made of a composition containing granular material, and that a part of the granular material is exposed on the upper surface of the inclined surface portion 42. From the viewpoint of improving visibility at night, a coating derived from fluorescent paint may be formed on at least a part of the upper surface of the inclined surface portion 42, and reflective tape or reflectors may be attached.

[0050] The ramp body 46 is the main body portion that supports the inclined surface portion 42 in each ramp member (for example, the first ramp member 41a and the second ramp member 41b) and forms a ramp shape that is inclined along the direction Pd of passage of the vehicle Pv as a whole. The material of the ramp body 46 is not particularly limited as long as it does not contradict the purpose of the present invention, but from the viewpoint of being lightweight and easy to carry, it is preferable to use a foamed plastic that has strength capable of temporarily supporting the weight of the vehicle Pv when the vehicle Pv passes over it. As such a foamed plastic, for example, bead-type polystyrene (hereinafter also referred to as "EPS") foam, extruded polystyrene foam, rigid urethane foam, polyethylene foam or phenolic foam can be used, and it is preferable to use EPS foam. EPS foam is a foamed plastic obtained by pre-foaming raw material beads containing polystyrene resin and a hydrocarbon-based foaming agent, then filling them into a mold and heating them to foam them to a volume in the range of approximately 15 to approximately 70 times.

[0051] The ramp body 46 may be configured to be temporarily compressed in the height direction Vd by the weight of the vehicle Pv when it passes over it. Engaging parts may be provided between the ramp body 46 constituting the lower ramp block 43 and the ramp body 46 constituting the middle ramp block 44, and between the ramp body 46 constituting the middle ramp block 44 and the ramp body 46 constituting the upper ramp block 45, to function in engaging these divided blocks. The inclined surface 42 and the ramp body 46 may have at least one through-hole along the height direction Vd to allow rainwater to flow from the upper surface of the inclined surface 42 through the inside of the ramp body 46 to the ground Gr. Alternatively, from the viewpoint of improving strength, it is preferable that the inclined surface 42 and the ramp body 46 do not have through-holes.

[0052] In the intersecting direction Cd perpendicular to the vehicle Pv's direction of passage Pd, the width Sl of each slope member (for example, the first slope member 41a) may be the same length as the passage length Rl of the hose insertion passage, as illustrated in Figure 2, or it may be a different length from the passage length Rl.

[0053] The hose bridge 10 includes at least one slope member 40, and depending on the condition of the ground Gr (road surface) on which it is installed, for example, only one slope member may be used, or three or more slopes may be used. Figure 3 illustrates the case where the height of the ground Gr on the right side of the page is the same as the height of the ground Gr on the left side of the page. On the other hand, although not shown, if the ground Gr on the right side of the page in Figure 3 is approximately the same height as the upper surface 23 of the first bridge member 21a relative to the ground Gr on the left side of the page, the second slope member 41b may be unnecessary. Alternatively, for example, if the height of the ground Gr on the right side of the page in Figure 3 is lower than the height of the ground Gr on the left side of the page, or if there are cracks or steps in the ground Gr on the left side of the page, a third slope member (not shown) may be placed on the ground Gr on the left side of the page in Figure 3.

[0054] The hose bridge 10 includes at least one bridge member 20 and at least one ramp member 40, and may further include at least one riser member, although this is not shown. Each riser member may be, for example, a flat plate-shaped member made of foamed plastic as described in the description of the ramp body 46 above. It is preferable that each riser member has a width longer than the width Sl of at least one ramp member 40 along the intersecting direction Cd which is perpendicular to the direction of passage Pd through which the vehicle Pv passes. The at least one riser member may be a single riser member, or it may be two or more riser members configured to be stackable. It is preferable that each riser member has an anti-slip layer made of, for example, a rubber mat on its upper surface, which has the advantage of making it easy to stack the riser members in multiple layers. It is preferable that the worker installs at least one raising member on the ground Gr, and then installs at least one ramp member 40 on top of that, so that the vehicle Pv can pass over the hose bridge 10 smoothly, depending on the condition of the ground Gr, and makes it easier to fine-tune the height and inclination angle of at least one ramp member 40. Furthermore, when installing at least one ramp member 40 on top of at least one raising member, it is preferable that the worker stands at a position slightly moved in the intersecting direction Cd from the planned installation position of at least one ramp member 40 (for example, each of the four work positions Sw shown in Figure 2), so makes it easier to fine-tune the height and inclination angle of at least one ramp member 40.

[0055] The matters disclosed herein include the following: (1) A bridge member in a hose bridge that protects the hose when a vehicle passes over it, It comprises a top plate and two or more top plate support parts that support the top plate, A hose insertion passage for passing the hose along a direction intersecting the direction in which the vehicle passes is formed below the top plate portion by the top plate portion and the two or more top plate support portions. A bridge member having a protective layer formed on at least a portion of the inner surface of the hose insertion passage that faces the hose that passes through the hose insertion passage. (2) The bridge member described in (1) above, wherein the upper surface of the top plate portion has inclined portions formed such that both ends in the direction the vehicle passes are lower than the central part of the upper surface. (3) The bridge member described in (1) or (2) above, wherein the bridge member is not provided with engaging portions for engaging the bridge member with the ramp member at both ends in the direction through which the vehicle passes. (4) A bridge member according to any one of (1) to (3) above, wherein the top plate portion and the two or more top plate support portions are made of fiber-reinforced plastic and integrated together. (5) The two or more tabletop support parts are three or more tabletop support parts, A bridge member according to any one of (1) to (4) above, wherein two or more hose insertion passages are formed below the top plate portion by the top plate portion and the three or more top plate support portions. (6) A bridge member according to any one of (1) to (5) above, configured such that multiple hoses are passed through a single hose insertion passage. (7) A hose bridge comprising at least one bridge member as described in any of (1) to (6) above, and at least one ramp member.

[0056] The present invention is not limited to the embodiments described above, and can be implemented in various improved, modified, or altered forms based on the knowledge of those skilled in the art, without departing from the spirit of the invention. The present invention may be implemented in a form in which any specific feature is replaced with another technology, within the scope of producing the same function or effect. For example, another embodiment may include a set comprising a hose bridge 10 including at least one bridge member 20 and at least one slope member 40, and at least one hose 30. [Explanation of Symbols]

[0057] 10... Horse Bridge, 20...at least one bridge member, 21a, 21b, 21c, 21d, 21e...bridge members, 22...top plate section, 23...top surface, 24...two or more top plate support sections, 25a, 25b, 25c, 25d...top plate support sections, 26...center section, 27a, 27b, 27c, 27d...edge sections, 28...inclined section, 29a, 29c, 29d...outer wall surface, 30...at least one hose, 31a, 31b, 31c...hoses, 32...at least one hose insertion passage, 33a, 33b, 33c...hose insertion passages, 34...bottom surface, 35a, 35b1, 35b2, 35c1, 35c2, 35d...side wall surfaces, 40...at least one slope member, 41a, 41b...slope members, 42...inclined surface, 43...lower slope block, 44...middle slope block, 45...upper slope block, 46...slope body, Gr...Ground, Pv...Vehicle Cd...crossing direction, Pd...passing direction, Vd...height direction, Hc: Hose central axis, Hd: Hose diameter, Rl: Passage length, Rh: Passage height, Rw: Passage width, Sl: Slope member width, Sw: Working position

Claims

1. A bridge member in a hose bridge that protects the hose when a vehicle passes over it, It comprises a top plate and two or more top plate support parts that support the top plate, A hose insertion passage for passing the hose along a direction intersecting the direction in which the vehicle passes is formed below the top plate portion by the top plate portion and the two or more top plate support portions. A bridge member having a protective layer formed on at least a portion of the inner surface of the hose insertion passage that faces the hose that passes through the hose insertion passage.

2. The bridge member according to claim 1, wherein the upper surface of the top plate portion is formed with inclined portions such that both ends in the direction through which the vehicle passes are lower than the central part of the upper surface.

3. The bridge member according to claim 1, wherein the bridge member is not provided with engaging portions for engaging the bridge member with a ramp member at both ends in the direction through which the vehicle passes.

4. The bridge member according to claim 1 or claim 2, wherein the top plate portion and the two or more top plate support portions are made of fiber-reinforced plastic and integrated together.

5. The two or more tabletop support parts are three or more tabletop support parts, The bridge member according to claim 1 or claim 2, wherein two or more hose insertion passages are formed below the top plate portion by the top plate portion and the three or more top plate support portions.

6. A bridge member according to claim 1 or claim 2, configured such that multiple hoses are passed through a single hose insertion passage.

7. A hose bridge comprising at least one bridge member according to claim 1 or claim 2, and at least one ramp member.

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