JP2015113699A - Footboard joining structure of portable slope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a joining structure of a footboard capable of securing high reliability when using a slope.SOLUTION: A forward extending projection piece part 12 is provided on one end surface of a footboard 11, and a fitting hole 13 capable of fitting the projection piece part 12 is provided on the other end surface, respectively, and a pair of the footboards 11 are joined to each other in a substantially plate shape in an extended state by fitting the projection piece part 12 of one adjacent footboard 11 to the fitting hole 13 of the other footboard 11. According to such a joining structure, force acting vertically to a joining part is supported by shearing rigidity of the projection piece part 12 and the fitting hole 13, and rotational force for acting in the direction for bending the joining parr downward, is also supported by pressure contact force generated between a base end part upper surface of the projection piece part 12 and a tip part upper surface of the fitting hole 13 and pressure contact force generated between a tip part under surface of the projection piece part 12 and a base end part under surface of the fitting hole 13, and the joining part holds high strength performance.

Description

  The present invention relates to a joining structure of treads in a portable slope constructed by joining treads.

  In general, a portable slope is composed of a footboard of a predetermined length (see, for example, Patent Document 1), but as a practical matter, the required length (appropriate length) for use of the slope is not constant, and the slope installation location However, it is difficult to optimally use a portable slope having a certain length in every scene. For this reason, conventionally, a plurality of slopes having different lengths are prepared, and these are selected and used according to the conditions of the installation location.

  JP 2002-97768 A

  However, it is uneconomical to prepare and use multiple slopes with different lengths in this way, and as an alternative to this, the applicant of the present application prepares a plurality of treads of a predetermined length. We are developing a portable slope that can be used by adding the required number of treads depending on the slope length.

  In such an add-on type slope, it is essential that the joint between the treads has a strength performance that can sufficiently withstand a load during use (that is, the weight of a wheelchair, the weight of a person, etc.).

  Accordingly, the present invention has been made for the purpose of proposing a joining structure of treads that can ensure high reliability when using a slope.

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

  In the first invention of the present application, in a tread board joining structure in a portable slope constructed by sequentially joining a plurality of tread boards 11 in one direction, a projecting piece portion 12 extending forward is provided on one end surface of the tread board 11. In addition, the other end surface is provided with a fitting hole 13 into which the protruding piece portion 12 can be fitted, and the protruding piece portion 12 of the adjacent one of the tread plates 11 is fitted into the fitting hole 13 of the other tread plate 11. It is characterized by having comprised so that a pair of step board 11 may be joined in the extended state in substantially flat form.

  In the second invention of the present application, in the tread board joining structure in the portable slope constructed by sequentially joining a plurality of treads 16 in one direction, a protrusion 17 extending in the plate width direction is provided on one end face of the tread board 16. A recess groove 18 into which the protrusion 17 can be fitted is provided on the other end surface, and the pair of protrusions 17 of the adjacent one of the treads 16 is fitted into the recess groove 18 of the other tread 16 to be hooked. The treads 16 are joined to each other in a substantially flat plate extending state.

  In the third invention of the present application, in the tread plate joining structure in the portable slope constructed by sequentially joining a plurality of treads 25 in one direction, the first latching portion 26 is provided at one end side of the tread plate 25 and the other end. The first latching portion 26 is provided with a first receiving surface 34A facing the back side of the tread plate 25, a second receiving surface 34B facing the surface side, and a surface. The second latching portion 27 has a first receiving surface 38A facing the back side of the tread plate 25, a second receiving surface 38B facing the surface side, and a hook facing the surface side. The second latching of the other tread 25 is provided on the first receiving surface 34A and the second receiving surface 34B of the first latching portion 26 of the adjacent one of the treads 25 with the stopper 28B. The second receiving surface 38B and the first receiving surface 38A of the portion 27 are brought into contact with and engaged with each other. At the same time, the hooking material 28 </ b> A of the first hooking portion 26 on the one footboard 25 is placed on the second hooking portion 27 side of the other footboard 25, and the second hooking portion on the other footboard 25. 27. The latching material 28B of 27 is latched to the first latching portion 26 side of one of the treads 25, so that the pair of treads 25 are joined in a substantially flat extension state. It is characterized by the construction.

  In the fourth invention of the present application, in a tread board joining structure in a portable slope constructed by sequentially joining a plurality of tread boards 40 in one direction, the first hinge portion 41 and the tread board 40 are provided at one end side of the tread board 40. A first receiving portion 42 facing the front surface side, a second hinge portion 43 and a second receiving portion 44 facing the back surface side of the tread plate 40 are provided on the other end side, respectively. The first hinge portion 41 and the second hinge portion 43 of the other tread plate 40 are coaxially supported by a pivot shaft 45, and the first receiving portion 42 of the one tread plate 40 is supported by the other tread plate 40. It is characterized in that the pair of treads 40 are joined to each other in an extended state in a substantially flat shape by abutting on the second receiving portion 44.

  In the fifth invention of the present application, in the tread board joining structure in the portable slope constructed by sequentially joining a plurality of tread boards 51 in one direction, the first hinge portion 52 is provided on one end face 55 side of the tread board 51, A second hinge portion 53 is provided on the other end surface 56 side, and the first hinge portion 52 of one adjacent tread plate 51 and the second hinge portion 53 of the other tread plate 51 are coaxially connected by a pivot shaft 54. The pair of footboards 51 are extended substantially in a flat plate shape by pivoting upward and bringing the end surface 55 of the one footboard 51 into contact with the end surface 56 of the other footboard 51. It is characterized by being configured to be joined.

  In the inventions of the present application, the following effects can be obtained.

  (A) According to the portable slope tread board joining structure according to the first invention of the present application, the protruding piece portions 12 of one adjacent tread board 11 are inserted into the fitting holes 13 of the other tread board 11, and these By joining the pair of treads 11 in a substantially flat plate-like state, of the load in use applied to these joints, the force acting substantially perpendicular to the joint is the projecting piece 12 and the above The rotational force that is supported by the shearing rigidity of the fitting hole 13 and that acts in the direction in which the joint is bent downward is caused by the load at the time of use and the upper surface of the base end portion of the protruding piece 12 and the fitting hole 13. It is supported by a pressure contact force generated between the top surface of the distal end portion and a pressure contact force generated between the bottom surface of the tip end portion of the projecting piece portion 12 and the bottom surface of the base end portion of the fitting hole 13, The joint will retain high strength performance and Strength on the reliability in use of the slope is ensured.

  (B) According to the portable slope tread plate joining structure according to the second invention of the present application, the protrusion 17 of one adjacent tread plate 16 is fitted into the concave groove 18 of the other tread plate 16 and latched. Since the pair of treads 16 are joined in a substantially flat plate-like state, the force acting substantially perpendicularly to the joint among the operating loads applied to the joint is The rotational force that is supported by the shear rigidity of the concave groove 18 and that acts in the direction in which the joint is bent downward is the surface on the ridge 17 side that faces in the direction substantially orthogonal to the direction of the load in use. Is supported by the pressure contact force generated between the groove 18 and the surface on the concave groove 18 side, and by the cooperation of both of them, the joint portion maintains high strength performance, and is reliable in strength when using a portable slope. Sex is secured.

  (C) According to the portable slope tread plate joining structure of the third invention of the present application, the first receiving surface 34A and the second second receiving surface 26A of the first latching portion 26 of the adjacent one of the tread plates 25. The second receiving surface 38B and the first receiving surface 38A of the second latching portion 27 of the other tread plate 25 are brought into contact with and engaged with the receiving surface 34B, respectively, and the first tread plate 25 is The latching material 28A of one latching portion 26 is placed on the second latching portion 27 side of the other tread 25, and the latching material 28B of the second latching portion 27 on the other tread 25 is placed on one side. In the state where the pair of treads 25 are joined in a substantially flat extending state, the treads 25 of one tread 25 are The first receiving surface 38A is the second receiving plate 25 of the other tread plate 25. The second receiving surface 38B of one tread 25 is abutted and engaged with the first receiving surface 34A of the other tread 25 from the rear side of the tread. The engaged state, that is, the state intersecting in the vertical direction.

  Accordingly, of the load in use applied to these joints, the force acting substantially perpendicularly to the joint is the first receiving surface 38A of one of the treads 25 and the second receiving of the other tread 25. It is supported by the shear rigidity of the surface 34B and the second receiving surface 38B of the one tread 25 and the first receiving surface 34A of the other tread 25. Further, the rotational force acting in the direction of bending the joint portion downward is a pressure contact acting between the first receiving surface 38A of one of the treads 25 and the second receiving surface 34B of the other tread 25. It is supported by the force and the pressure contact force acting between the second receiving surface 38B of one of the treads 25 and the first receiving surface 34A of the other tread 25.

  As a result, the joint portion maintains high strength performance due to the cooperation of both of them, and the reliability in strength at the time of using the portable slope is ensured.

  (D) According to the portable slope tread board joining structure according to the fourth invention of the present application, the first hinge part 41 of the adjacent one of the tread boards 40 and the second hinge part 43 of the other tread board 40 are arranged. The pair of treads is pivotally supported on the same axis by the pivot shaft 45 and the first receiving part 42 of the one tread 40 is brought into contact with the second receiving part 44 of the other tread 40. Since the members 40 are joined to each other in a substantially flat plate shape, the force acting substantially perpendicularly to the joint portion of the load at the time of use applied to the joint portion is mainly one of the treads 40. Rotation about the pivot shaft 45 that is supported by the shear rigidity of the first hinge portion 41 and the second hinge portion 43 of the other tread plate 40 and acts in a direction to bend the joint portion downward. The force is mainly due to the one of the treads 40. It is supported by the pressure contact force acting between the first receiving portion 42 and the second receiving portion 44 of the other tread plate 40, and the joint portion maintains high strength performance by the cooperation of both. In addition, reliability in strength during use of the portable slope is ensured.

  (E) According to the portable slope tread plate joining structure according to the fifth aspect of the present invention, the first hinge portion 52 of the one adjacent tread plate 51 and the second hinge portion 53 of the other tread plate 51 are connected. The pair of footboards 51 are substantially flatly supported by being pivotally supported by a pivotal shaft 54 and abuttingly engaging the end surface 55 of the one footboard 51 and the end surface 56 of the other footboard 51. In the use load applied to these joint portions, the force acting substantially perpendicular to the joint portion is the first hinge portion of one of the treads 51. 52 and the second hinge portion 53 of the other tread 51 are supported by the shear rigidity, and the rotational force around the pivot shaft 54 acting in the direction to bend the joint downward is the one tread. 51 of the end face 55 and the other tread 51 It is supported by the pressure contact force acting between the end faces 56, and by the cooperation of both of them, the joint portion maintains high strength performance, and the reliability in strength at the time of using the portable slope is ensured. .

  1 is an overall view of a portable slope to which a tread board joining structure according to a first embodiment of the present invention is applied.   It is structure explanatory drawing of the adjustment slope shown in FIG.   It is III-III sectional drawing of FIG.   It is a general view of the portable slope to which the tread board joining structure which concerns on 2nd Embodiment of this invention was applied.   It is structure explanatory drawing of the adjustment slope shown in FIG.   It is VI-VI sectional drawing of FIG.   It is a general view of the portable slope to which the tread board joining structure which concerns on 3rd Embodiment of this invention was applied.   It is structure explanatory drawing of the adjustment slope shown in FIG.   It is correspondence explanatory drawing before joining of a pair of adjustment slope.   It is explanatory drawing of the joining operation state of a pair of adjustment slope.   It is a perspective view which shows the joining completion state of a pair of adjustment slope.   It is XII-XII sectional drawing of FIG.   It is a whole figure of the portable slope to which the tread board junction structure concerning a 4th embodiment of the invention of this application was applied.   It is structure explanatory drawing of the adjustment slope shown in FIG.   It is a perspective view which shows the joining completion state of a pair of adjustment slope.   It is XVI-XVI sectional drawing of FIG.   It is a general view of the portable slope to which the tread board joining structure concerning the 5th Embodiment of this invention was applied.   It is structure explanatory drawing of the adjustment slope shown in FIG.   It is joining work explanatory drawing of a pair of adjustment slope.   It is sectional drawing of the junction part of a pair of adjustment slope.

  Hereinafter, a tread board joining structure for a portable slope according to the present invention will be specifically described based on preferred embodiments.

“First Embodiment”
FIG. 1 shows a portable slope Z1 to which a footboard joining structure according to the invention of claim 1 of the present application is applied. The portable slope Z1 has a plurality of (two in this embodiment) adjustment slopes 2 joined to one end of a long basic slope 1, and a lower side end member 3 at the other end of the basic slope 1. Further, the upper end member 4 is joined to the distal end side of the adjustment slope 2, and the length of the portable slope Z1 as a whole can be arbitrarily set by selecting the number of the adjustment slopes 2 to be joined. It is like that.

  Further, the portable slope Z1 can be stored in a folded state at a substantially central position in the width direction. In order to realize such a storage function, the basic slope 1 moves the pair of left and right treads 5 in the direction of the width force. And both of them are foldably connected by a flexible hinge member 6. Similarly, the adjustment slope 2 has a pair of left and right treads 11 juxtaposed in the width direction, and both are connected by a flexible hinge member 6 so as to be bent.

  The lower side end member 3 includes a pair of left and right treads 61, and each tread 61 is fixedly connected to an end of each tread 11 of the basic slope 1. Further, the upper end member 4 is composed of a pair of left and right treads 62, and these treads 62 are fixedly connected to the end portions of the treads 11 of the adjustment slope 2.

  In FIG. 1, reference numeral 7 denotes wheel stops provided on both side edges of the basic slope 1, and reference numeral 8 denotes wheel stops provided on both side edges of the adjustment slope 2.

  By the way, the tread board joining structure of the present invention includes the treads 11 of the adjustment slopes 2 moving back and forth in the slope traveling direction, the treads 11 of the basic slope 1 and the treads 11 of the adjustment slope 2, and the adjustment slope 2 This is applied to the joining between the tread 11 and the tread 62 of the upper side end member 4, but in the following, the joining between the treads 11 of the adjusting slope 2 will be specifically described as an example.

  As shown in FIG. 2, the tread 11 is formed of a rectangular flat plate, and on one end surface thereof is provided a rectangular protruding piece portion 12 extending forward from the end surface, while on the other end surface. A rectangular deep hole-like fitting hole 13 that is recessed from the end face in the plane direction is provided. As shown in FIG. 3, the shape and size of the fitting hole 13 is appropriately set so that the protruding piece 12 can be closely fitted therein.

  When a plurality of the treads 11 are joined to form a running surface that is continuous with the treads 5 of the basic slope 1, as shown in FIG. 3, the protruding piece 12 of one tread 11 is connected to the other tread. 11 are fitted into the fitting holes 13, and both are fastened by the fixing material 14. In consideration of the fitting property and adhesion between the protruding piece 12 and the fitting hole 13, the upper and lower surfaces and the left and right surfaces of the protruding piece 12, and the upper and lower inner surfaces and the left and right inner surfaces of the fitting hole 13 are Both are tapered surfaces.

  Therefore, according to the tread plate joining structure, the force acting substantially perpendicular to the joint portion of the use load applied to the joint portion of the tread plate 11 is sheared between the projecting piece portion 12 and the fitting hole 13. Supported by rigidity. Further, the rotational force acting in the direction in which the joint portion is bent downward is applied to the contact portion a between the upper surface of the proximal end portion of the projecting piece portion 12 and the upper surface of the distal end portion of the fitting hole 13 by the use load. It is supported by the generated pressure contact force and the pressure contact force generated at the contact portion b between the lower surface of the distal end portion of the protruding piece 12 and the lower surface of the base end portion of the fitting hole 13. By the cooperation of these two, the joint portion maintains high strength performance, and the strength reliability during use of the portable slope Z1 is ensured.

“Second Embodiment”
FIG. 4 shows a portable slope Z2 to which the footboard joining structure according to the invention of claim 2 of the present application is applied. Like the portable slope Z1 in the first embodiment, the portable slope Z2 includes a basic slope 1, a plurality of adjustment slopes 2, a lower side end member 3, and an upper side end member 4. A difference from the portable slope Z1 is a joining structure of the treads 16 constituting the adjustment slope 2. The joining structure of the tread board 16 will be specifically described with reference to FIGS. 5 and 6.

  As shown in FIG. 5, the tread 16 is formed of a rectangular flat plate. On one end surface 19 thereof, a protrusion 17 having a substantially T-shaped cross section extending in the width direction of the tread 16 is provided. The end face 20 is provided with a groove 18 having a substantially T-shaped cross section into which the protrusion 17 can be fitted.

  When a plurality of the treads 16 are joined to form a running surface that is continuous with the treads 5 of the basic slope 1, as shown in FIG. 5 and FIG. The protrusion 17 of the other tread 16 is fitted from the axial direction (that is, the plate width direction). It should be noted that both of these are prevented from coming off in the fitting direction by wheel stoppers 8 (see FIG. 4) attached to both ends of the tread plate 25.

  Therefore, according to this tread plate joining structure, of the load in use applied to the joint portion of the tread plate 16, the force acting substantially perpendicular to the joint portion is due to the shear rigidity of the protrusion 17 and the groove 18. Supported. Further, the rotational force acting in the direction in which the joint is bent downward is generated between the surface on the ridge 17 side and the surface on the concave groove 18 side facing each other in a direction substantially perpendicular to the direction of the load in use. In this embodiment, as shown in FIG. 6, the upper portion of the end surface 20 of the one tread plate 16 on the side where the concave groove 18 is formed and the side where the protrusion 17 is formed on the other tread plate 16 Pressure contact force generated in the contact portion “c” with the upper portion of the end surface 19 of the first step plate 19, the lower step surface 21 of the concave groove 18 of one step plate 16, and the lower step surface of the protrusion 17 of the second step plate 16. It is supported by the pressure contact force generated at the contact portion “d” with 22. Together, these two joints maintain high strength performance, and strength reliability is ensured when the portable slope is used.

“Third Embodiment”
FIG. 7 shows a portable slope Z3 to which the footboard joining structure according to the invention of claim 3 of the present application is applied. Like the portable slope Z1 in the first embodiment, the portable slope Z3 includes a basic slope 1, a plurality of adjustment slopes 2, a lower side end member 3, and an upper side end member 4. The difference from the portable slope Z1 is the joining structure of the tread plate 25 that constitutes the adjusting slope 2. The joining structure of the tread board 25 will be specifically described with reference to FIGS.

  As shown in FIG. 8, the tread plate 25 is formed of a rectangular flat plate, and one end portion thereof has five first hook portions 26 extending outward from the end portion, and the other end. On the side, five second latching portions 27 extending outward from the end portions are provided.

  The first hooking portion 26 is configured by extending the surface side of the tread plate 25 outward with a predetermined width as it is, and has two projecting pieces 31A and 31B and two concave portions 32A on one side edge thereof. , 32B are alternately formed.

  The back surface of the first protrusion 31 </ b> A is a first receiving surface 34 </ b> A that faces the back surface side of the tread plate 25. Further, the back surface of the second projecting piece 31 </ b> B is separated and opposed to the abutting surface 33 formed from the back surface side of the tread plate 25. The first recess 32A is a continuous space from the front surface to the back surface of the tread plate 25. When the pair of tread plates 25 are joined as will be described later, the second latching portion 27 of the other tread plate 25 is provided. It functions as an insertion space. An inner portion of the second recess 32B is a second receiving surface 34B that faces the surface side of the tread plate 25 at the same height as the first receiving surface 34A. Further, a latching material 28A is provided on the abutting surface 33.

  The surface of the tread plate 25 is left as it is so that the second hook 27 corresponds to the space between the first hooks 26 (that is, the abutting surface 33). The two protruding pieces 35A are formed on one side edge (that is, the side edge facing the protruding pieces 31A, 31B, etc. on the first latching portion 26 side). , 35B and two recesses 36A, 36B are alternately formed.

  The back surface of the first protruding piece 35 </ b> A is a first receiving surface 38 </ b> A that faces the back surface side of the tread plate 25. Further, the back surface of the second projecting piece 35 </ b> B is spaced apart and opposed to the abutting surface 37 formed from the back surface side of the tread plate 25. The first recess 36A is a continuous space from the front surface to the back surface of the tread plate 25. When the pair of tread plates 25 are joined as described later, the first latching portion 26 of the other tread plate 25 is used. It functions as an insertion space. An inner portion of the second recess 36B is a second receiving surface 38B that faces the surface side of the tread plate 25 at the same height as the first receiving surface 38A. Further, a hooking material 28B is provided on the abutting surface 37.

  In a state where the pair of treads 25 configured as described above are joined in a substantially flat plate extending state, each second latching portion 27 of one tread 25 is connected to the other tread 25 as shown in FIG. Each of the projections 31A and 31B on the first latching portion 26 side is fitted between the recesses 36A and 36B on the second latching portion 27 side. The projecting pieces 35A and 35B on the second latching portion 27 side are fitted into the recesses 32A and 32B on the first latching portion 26 side, and the first latching portion 26 is connected to the joint portion. And the second latching portions 27 are alternately arranged in the width direction of the tread plate 25.

Here, the joining method of a pair of footboard 25 is demonstrated. As described above, in the joined state of the pair of treads 25, the projecting pieces 31A and 31B on the first latching portion 26 side are fitted in the recesses 36A and 36B on the second latching portion 27 side, The protrusions 35A and 35B on the second hooking portion 27 side are fitted in the recesses 32A and 32B on the first hooking portion 26 side. The receiving surface 34A faces the back surface side of the tread plate 25, the second receiving surface 34B faces the front surface side of the tread plate 25, and the first receiving surface 38A on the second latching portion 27 side is the back surface of the tread plate 25. Since the second receiving surface 38B faces the surface side of the tread plate 25, the first latching portion 26 of the one tread plate 25 and the second latching portion 27 of the other tread plate 25 are left as they are. They cannot be stacked vertically.

  Therefore, when joining the pair of treads 25, first, as shown in FIG. 9, the end portion of the one tread plate 25 on the side where the second latching portion 27 is formed and the first tread plate 25 of the first step plate 25. The end portion on the side where the latching portion 26 is formed is opposed. Next, as shown in FIG. 10, one of the treads 25 has a high level on the second latching portion 27 side, and the other tread plate 25 has a high level on the first latching portion 26 side. While being inclined, the second latching portion 27 of one of the treads 25 is inserted into the first recess 32A portion of the first latching portion 26 of the other tread 25 and the first tread of the other tread 25 is Is inserted into the first recess 36A portion of the second latching portion 27 of one of the treads 25, and the two are crossed.

  Then, from this intersecting state, the inclination is gradually reduced so that the pair of treads 25 approaches a flat plate shape, and the first projecting piece 35A on the second latching portion 27 side is replaced with the first latching portion. 26 is fitted into the second concave portion 32B on the 26th side and brought into contact with the second receiving surface 34B, and the first projecting piece 31A on the first latching portion 26 side is brought into contact with the second latching portion. As shown in FIG. 11, the pair of tread plates 25 are joined in a substantially flat plate-like state by being fitted in the second recess 36B on the 27th side and brought into contact with the second receiving surface 38B. . At the same time, the latching material 28B on the second latching portion 27 side of one of the treads 25 is inserted into the latching hole 29A of the other tread plate 25 and the first latching portion 26 side of the other tread plate 25. The latching material 28A is latched in the latching holes 29B of one of the treads 25, thereby restricting the separation of the pair of treads 25 in the planar direction.

  Thus, in a state where the pair of step plates 25 are joined in a substantially flat plate-like state, the first receiving surface 38A of one of the step plates 25 is the second of the other step plate 25, as shown in FIG. The second receiving surface 38B of one tread 25 is abutted and engaged with the first receiving surface 34A of the other tread 25 from the rear side of the tread. The contacted state is established.

  Accordingly, of the load in use applied to these joints, the force acting substantially perpendicularly to the joint is the first receiving surface 38A of one of the treads 25 and the second receiving of the other tread 25. It is supported by the shear rigidity of the surface 34B and the second receiving surface 38B of the one tread 25 and the first receiving surface 34A of the other tread 25. Further, the rotational force acting in the direction of bending the joint portion downward is a pressure contact acting between the first receiving surface 38A of one of the treads 25 and the second receiving surface 34B of the other tread 25. It is supported by the force and the pressure contact force acting between the second receiving surface 38B of one of the treads 25 and the first receiving surface 34A of the other tread 25. As a result, the joint portion maintains high strength performance due to the cooperation of both of them, and the reliability in strength at the time of using the portable slope is ensured.

“Fourth Embodiment”
FIG. 13 shows a portable slope Z4 to which the tread board joining structure according to the invention of claim 4 of the present application is applied. Like the portable slope Z1 in the first embodiment, the portable slope Z4 includes a basic slope 1, a plurality of adjustment slopes 2, a lower side end member 3, and an upper side end member 4. A difference from the portable slope Z1 is a joining structure of the treads 40 constituting the adjustment slope 2. The joining structure of the tread board 40 will be specifically described with reference to FIGS.

  As shown in FIG. 14, the tread plate 40 is configured by a rectangular flat plate, and a first hinge portion 41 is provided at a substantially central position in the width direction of one end portion of the tread plate 40. A first receiving portion 42 is provided on both sides of the tread plate 25. The first receiving portion 42 is positioned at a position lower than the surface of the tread plate 25 by about half of its thickness. Further, at the other end portion of the tread plate 25, the pair of left and right second hinge portions 43 in a state of being located closer to both sides in the width direction, and about half of the plate thickness from the back surface of the tread plate 25, A pair of left and right second receiving portions 44 are provided.

  When a plurality of the treads 40 are joined to form a running surface continuous with the treads 5 of the basic slope 1, the first hinge portion of one of the treads 40 is shown in FIGS. 41 and the second hinge portion 43 of the other tread plate 40 are coaxially supported by a pivot shaft 45, and the second receiving portion 44 of one tread plate 40 and the second hinge portion 43 of the other tread plate 40 are supported. Are brought into contact with each other, and the pair of treads 40 are joined to each other in a substantially flat plate shape.

  In this jointed state, of the load at the time of use applied to the joint part, the force acting substantially perpendicularly to the joint part is mainly caused by the first hinge part 41 of one step board 40 and the other step board 40. The second hinge portion 43 is supported by the shear rigidity. Further, the rotational force around the pivot shaft 45 acting in the direction in which the joint portion is bent downward is applied to the first receiving portion 42 of the one tread plate 40 and the second receiving portion of the other tread plate 40. It is supported by the pressing force acting between the portions 44. Together, these two joints maintain high strength performance, and strength reliability is ensured when the portable slope is used.

“Fourth Embodiment”
FIG. 17 shows a portable slope Z5 to which the tread board joining structure according to the invention of claim 5 of the present application is applied. Like the portable slope Z1 in the first embodiment, the portable slope Z5 includes a basic slope 1, a plurality of adjustment slopes 2, a lower side end member 3, and an upper side end member 4, The difference from the portable slope Z1 is the joining structure of the tread 51 that constitutes the adjusting slope 2. The joining structure of the tread board 51 will be specifically described with reference to FIGS.

  As shown in FIG. 18, the tread 51 is formed of a rectangular flat plate. The first hinge portion 52 is positioned near the lower end of one end surface 55, and the second hinge 52 is positioned near the lower end of the other end surface 56. Hinge portions 53 are provided.

  When a plurality of the treads 51 are joined to form a running surface continuous with the treads 5 of the basic slope 1, the first hinge of one tread 51 is shown in FIGS. The part 52 and the second hinge part 53 of the other tread 51 are coaxially supported by a pivot shaft 54.

  In this joined state, of the operating load applied to the joined portion, the force acting substantially perpendicular to the joined portion is supported by the shear rigidity of the hinge portions 52 and 53. Further, the rotational force around the pivot shaft 54 acting in the direction in which the joint is bent downward is a pressure contact acting between the end surface 55 of the one tread plate 51 and the end surface 56 of the other tread plate 51. Supported by force. Together, these two joints maintain high strength performance, and strength reliability is ensured when the portable slope is used.

  The footboard joining structure of the present invention can be used in the step of joining the footboards when manufacturing a portable slope.

1 ..Basic slope 2 ..Adjustment slope 5 ..Tread board 11 ..Tread board 12 ..Projection piece 13.・ First latching part 27 ・ ・ Second latching part 40 ・ ・ Treading board 41 ・ ・ First hinge part 43 ・ ・ Second hinge part 51 ・ ・ Treading board Z1 to Z5 ・ ・ Slope for portable use

Claims (5)

In a portable slope constructed by sequentially joining a plurality of treads (11) in one direction,
A protrusion piece (12) extending forward is provided on one end face of the tread (11), and a fitting hole (13) into which the protrusion piece (12) can be fitted is provided on the other end face. By inserting the protruding piece (12) of the tread (11) into the fitting hole (13) of the other tread (11), the pair of treads (11) are extended in a substantially flat shape. A tread board joining structure in a portable slope, characterized by being configured to join. In a portable slope constructed by sequentially joining a plurality of treads (16) in one direction,
A protrusion (17) extending in the width direction of the plate is provided on one end face of the tread (16), and a concave groove (18) into which the protrusion (17) can be fitted is provided on the other end, and one adjacent tread ( The pair of treads (16) are joined to each other in a substantially flat shape by fitting the protrusions (17) of 16) into the concave grooves (18) of the other tread (16) and hooking them. A tread board joining structure in a portable slope, characterized by being configured to do so. In a portable slope constructed by sequentially joining a plurality of treads (25) in one direction,
A first latching portion (26) is provided on one end side of the tread plate (25), and a second latching portion (27) is provided on the other end side, respectively.
The first latching portion (26) includes a first receiving surface (34A) facing the back surface side of the tread (25), a second receiving surface (34B) facing the surface side, and a latching material facing the surface side. (28A), and the second hooking portion (27) includes a first receiving surface (38A) facing the back side of the tread (25), a second receiving surface (38B) facing the surface side, and the surface It has a hooking material (28B) facing the side,
The first receiving surface (34A) and the second receiving surface (34B) of the first latching portion (26) of the adjacent one of the treads (25) are connected to the first of the other tread (25). The second receiving surface (38B) and the first receiving surface (38A) of the second latching portion (27) are brought into contact with each other, and the first latching on one of the treads (25) is provided. The hooking material (28A) of the part (26) is placed on the second hooking part (27) side of the other tread (25), and the second hooking part (27) of the other tread (25). The above-mentioned latching material (28B) is latched on the first latching portion (26) side of one of the treads (25), thereby extending the pair of treads (25) in a substantially flat shape. A tread board joining structure in a portable slope, characterized in that it is constructed so as to be joined in the installed state. In a portable slope constructed by sequentially joining a plurality of treads (40) in one direction,
A first hinge portion (41) and a first receiving portion (42) facing the surface side of the tread plate (40) are provided on one end side of the tread plate (40), and a second hinge portion (43) is provided on the other end side. And a second receiving portion (44) facing the back side of the tread (40),
The first hinge part (41) of the adjacent one of the treads (40) and the second hinge part (43) of the other tread (40) are coaxially supported by the pivot shaft (45). By making the first receiving part (42) of the one tread (40) abut the second receiving part (44) of the other tread (40), the pair of treads (40) A tread board joining structure in a portable slope, wherein the treads are joined in a state of extending in a substantially flat plate shape. In a portable slope constructed by sequentially joining a plurality of treads (51) in one direction,
A first hinge portion (52) is provided on one end surface (55) side of the tread plate (51), and a second hinge portion (53) is provided on the other end surface (56) side,
The first hinge part (52) of the adjacent one of the treads (51) and the second hinge part (53) of the other tread (51) are coaxially supported by the pivot shaft (54). Then, the end surface (55) of the one of the treads (51) and the end surface (56) of the other of the treads (51) are brought into contact with each other, so that the pair of treads (51) are substantially flat. A tread board joining structure in a portable slope, characterized in that it is constructed to join in an extended state.

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