Step fastener for truck load-carrying platform and step for load-carrying platform with fastener

Abstract

To easily attach and assemble a loading step using a scaffold member to a load-carrying platform of a truck and to easily remove the assembled loading step from the load-carrying platform of the truck.SOLUTION: A step fastener 10 for a truck load-carrying platform comprises: angle materials 21 and 31 long in one direction; channel materials 22 and 32 attached to the upper parts of the angle materials 21 and 31 to protrude to the backsides of the angle materials 21 and 31, and engaged with the truck load-carrying platform 40; upper L-shaped metal fittings attached to the first positions of the angle materials 21 and 31 to protrude to the front sides of the angle materials 21 and 31, and fitted into upper pocket metal fittings of support pillars 11 and 12 to which step boards 17 and 18 serving as steps are attached to support the support pillars 11 and 12; and lower L-shaped metal fittings attached to second positions lower than the first positions to protrude to the front sides of the angle materials 21 and 31, and fitted into lower pocket metal fittings of the support pillars 11 and 12 to support the support pillars 11 and 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a step fixing device for a truck bed, which is used to fix a step to a truck bed when loading and unloading luggage and various materials (hereinafter referred to as "luggage, etc.") onto the truck bed, and a truck bed step with fixing device to which this fixing device is attached. [Background technology]

[0002] Scaffolding used in construction work is assembled from various components such as steel pipe posts, treads (antrails, scaffolding boards) that serve as the work floor, brackets for attaching scaffolding materials (horizontal members, vertical members, diagonal members, etc.) to the posts, handrails, ladders (stairs), braces, jacks, etc. (hereinafter referred to as "scaffolding components"). Then, the number of scaffolding members required to erect the scaffolding to be used in the construction work is loaded onto the bed of a truck and transported from the scaffolding member storage area to the construction site. In this case, steps, ladders, etc. are used to load and unload the scaffolding members onto the truck bed, and various proposals have been made from the standpoints of ease of fixing steps, ladders, etc. to the truck bed, ease of working using steps, ladders, etc., safety, etc.

[0003] For example, Patent Document 1 (JP Patent Publication No. 6-173561) discloses a device for lifting up and down to a truck bed, in which main reinforcement 9 is stretched between two support ribs 5 to form an H-shaped framework, with hooks 6 attached to the upper ends and brackets 10 protruding from the lower ends of both support ribs 5, with a step 3 attached to a pivot 11 installed between both brackets 10, 10 so as to be freely rotatable in the vertical direction, and a stopper 7 is provided so as to be able to abut against the support ribs 5, so as to hold the step 3 in a horizontally protruding position. The step 4 is removably hooked between a fallen side wall panel 2 and the bed 1 and attached along the side wall panel 2. However, the main reinforcement 9, bracket 10, and step 3 used in the platform 4 of Patent Document 1 are not scaffolding components. Therefore, when using the lifting device of Patent Document 1 to load and unload scaffolding members onto the bed of a truck, there is a problem that a lifting device assembled from dedicated members other than the scaffolding members is required.

[0004] In addition, Patent Document 2 (JP Patent Publication 7-202186A) discloses a step device for the bed of a truck, which comprises a first support member 2 made of a plate material with an L-shaped cross section, having a bent portion 3 formed at one end 2A and a first step plate 4 rotatably attached to the other side 2B via a first hinge 4A, and a second support member 5 having a second step plate 7 rotatably attached via a second hinge 5B and slidably attached to the first support member 2, in which the bent portion 3 of the first support member 2 is inserted into a plurality of engagement holes 1 provided at the lower end 106A of a side gate 106 of the bed 103. However, the first step plate 4, second support member 5, and second step plate 7 used to assemble the step device for the truck bed of Patent Document 2 are not scaffolding members, and there is a problem that when using the step device of Patent Document 2 to load and unload the scaffolding members onto the truck bed, a step device assembled from dedicated members other than the scaffolding members is required.

[0005] Furthermore, Patent Document 3 (JP 2019-1222 A) discloses a truck boarding and alighting step in which multiple upper and lower step boards are foldably connected to a square frame via a pair of left and right parallel link mechanisms, and a pair of left and right hooks are attached to the upper horizontal part of the frame to fit into the gap between the floor board of the truck and the open tailgate, in which each of the vertical movable links that constitute the parallel link mechanisms and are arranged parallel to the vertical part of the frame each extend above the topmost step board, and a handrail bar can be removably attached to the upper extension part of each of the vertical movable links. However, in the truck boarding and alighting step in Patent Document 3, although vertical members of scaffolding components can be used for the handrail bars, scaffolding components cannot be used for the square frame or parallel link mechanism, and the steps connected to the square frame are attached integrally with each other by multiple screws and fixing rivets to the upper surface of each curved corner part of each step mounting body, which is a pipe with a circular cross section bent into a U-shape, so that the steps (antis, scaffolding boards) of scaffolding components cannot be used. Therefore, even when using the truck boarding and alighting step of Patent Document 3 to load and unload scaffolding members onto the bed of a truck, there is a problem that boarding and alighting steps are required in which most of the components are assembled from dedicated components other than the scaffolding components. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 6-173561 [Patent Document 2] Japanese Patent Application Publication No. 9-202186 [Patent Document 3] JP 2019-1222 A Summary of the Invention [Problem to be solved by the invention]

[0007] The problem that the present invention aims to solve is to provide a step fixing device for a truck bed, which can be easily attached to and assembled as a bed step using scaffolding members when loading and unloading scaffolding members onto the bed of a truck, and which can easily remove the assembled bed step from the truck bed, and a truck bed step with fixing device to which this fixing device is attached. [Means for solving the problem]

[0008] The invention of claim 1 solves the above-mentioned problem by providing a step fixing device for a truck bed comprising a support rib that is long in one direction, a bed engagement portion that is attached to the top of the support rib and protrudes from the back side of the support rib to engage with the truck bed, a first mating support portion that is attached to a first position of the support rib and protrudes from the front side of the support rib and is fitted into one pocket fitting of a pocket fitting-equipped support pillar to which a tread plate that serves as a step is attached to support the pocket fitting-equipped support pillar, and a second mating support portion that is attached to a second position of the support rib below the first position, protrudes from the front side of the support rib, and is fitted into another pocket fitting of the pocket fitting-equipped support pillar to support the pocket fitting-equipped support pillar.

[0009] The invention of claim 2 solves the above problem by providing a step fixing device for a truck bed, in which the first mating support portion and the second mating support portion have upright pieces extending along the longitudinal axis of the support bone and fitted into the pocket fittings.

[0010] The invention of claim 3 solves the above-mentioned problems by providing a step fixing device for a truck bed, in which the support ribs are made of metal angle bars.

[0011] The invention of claim 4 provides a truck bed step with fixings comprising a pair of step fixings attached to a truck bed, a pair of pocket fitting equipped posts supported by each of the pair of step fixings, a pair of brackets attached to each of the pair of pocket fitting equipped posts, and a tread attached across the pair of brackets, wherein the step fixing device comprises a support rib that is long in one direction, a bed engagement portion attached to the upper part of the support rib and protruding from the back side of the support rib to engage with the truck bed, a first mating support portion attached to a first position of the support rib and protruding from the front side of the support rib and fitted into one pocket fitting of the pocket fitting equipped post to support the pocket fitting equipped post, and a second mating support portion attached to a second position of the support rib below the first position, protruding from the front side of the support rib and fitted into the other pocket fitting of the pocket fitting equipped post to support the pocket fitting equipped post, thereby solving the above-mentioned problem. Effect of the Invention

[0012] In the step fixing device for a truck bed of the invention described in claim 1, the bed engagement portion attached to the upper part of the support bone is engaged with the truck bed, the first joint support portion attached to a first position of the support bone and protruding to the front side of the support bone is fitted into one pocket fitting of the pocket fitting-equipped support pillar to which the tread that serves as the step is attached, and the second joint support portion attached to a second position lower than the first position of the support bone and protruding to the front side of the support bone is fitted into the other pocket fitting of the pocket fitting-equipped support pillar, thereby achieving the effect that a truck bed step using a scaffolding member can be easily attached and assembled to the truck bed, and the assembled truck bed step can be easily removed from the truck bed.

[0013] The step fixing device for a truck bed of the invention described in claim 2 further has the effect that, simply by inserting the upright pieces of the first and second mating support parts into the pocket fittings, the first and second mating support parts can be easily fitted into one pocket fitting and the other pocket fitting of the pocket fitting-equipped support pillar.

[0014] In the step fixing device for a truck bed of the invention described in claim 3, the support bone is made of a metal angle bar, which further has the effect of increasing the strength of the support bone and making it easy to attach the first joint support portion and the second joint support portion to the support bone.

[0015] In the truck bed step with fixing devices of the invention described in claim 4, the bed engagement portion attached to the upper part of the support bones of a pair of step fixing devices is engaged with the truck bed, and a first joint support portion attached to a first position of the support bones and protruding to the front side of the support bones is fitted into one pocket fitting of a pocket fitting-equipped support pillar to which a tread plate to serve as a step is attached, and a second joint support portion attached to a second position lower than the first position of the support bones and protruding to the front side of the support bones is fitted into another pocket fitting of the pocket fitting-equipped support pillar, thereby achieving the effect that a truck bed step using a pair of pocket fitting-equipped supports, a pair of brackets and tread plates, which are scaffolding members, can be easily attached and assembled to the truck bed, and the assembled truck bed step can be easily removed from the truck bed. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a perspective view of the truck bed step with fastener of the present invention; [Diagram 2] FIG. 2 is a plan view of the truck bed step with fasteners shown in FIG. 1. [Diagram 3] FIG. 2 is a front view of the truck bed step with fixing device shown in FIG. [Figure 4] FIG. 2 is a left side view of the truck bed step with fixing device shown in FIG. [Diagram 5] FIG. 1 shows a perspective view, a plan view, and a bottom view of the support. [Figure 6] FIG. 2 is a perspective view of a short bracket, a long bracket, a step board, and a handrail shown in FIG. [Figure 7] 2A is a perspective view, a plan view, a front view, and a left side view of the step fixing device shown in FIG. 1. [Figure 8] 1 is a perspective view of step fixing devices 20, 30 attached to a truck bed 40, and a perspective view of step fixing devices 20, 30 attached to posts 11, 12. FIG. [Figure 9] FIG. 2 is a perspective view of the state in which short brackets 13, 14 and long brackets 15, 16 are attached to supports 11, 12. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] [Overall configuration of truck bed step with fixings] FIG. 1 is an oblique view of the step for a truck bed with a fixing device of the present invention, FIG. 2 is a plan view of the step for a truck bed with a fixing device shown in FIG. 1, FIG. 3 is a front view of the step for a truck bed with a fixing device shown in FIG. 1, FIG. 4 is a left side view of the step for a truck bed with a fixing device shown in FIG. 1, FIGS. 5(a) to (c) are respectively an oblique view, a plan view and a bottom view of the support pillar in FIG. 1, FIGS. 6(a) to (d) are respectively oblique views of the short bracket, long bracket, tread and handrail shown in FIG. 1, and FIGS. 7(a) to (d) are respectively an oblique view, a plan view, a front view and a left side view of the step fixing device shown in FIG. 1. In the drawing, 1 is a step for a truck bed with a fixing device, 10 is a step for a truck bed, 11 and 12 are pillars, 11a and 12a are vertical pipes, 11b and 12b are upper pocket metal fittings, 11c and 12c are lower pocket metal fittings, 11b1 to 11b4, 11c1 to 11c4, 12b1 to 12b4, and 12c1 to 12c4 are pocket metal fittings, 13, 14 is a short bracket, 13a, 14a are horizontal pipes, 13b, 13c, 14b, 14c are wedge portions, 13d, 14d are supports, 15, 16 are long brackets, 15a, 16a are horizontal pipes, 15b, 15c, 16b, 16c are wedge portions, 15d, 16d are supports, 17, 18 are stepping boards, 17a, 18a are outer frames, 17b, 17 b is a net, 17c, 17d, 17e, 17f, 18c, 18d, 18e, 18f are hooks, 19a, 19b are handrails, 19a1, 19b1 are horizontal pipes, 19a2, 19a3, 19b2, 19b3 are wedges, 20, 30 are step fixing devices, 21, 31 are angle members, 21a, 31a are base pieces, 21b, 31b are protruding pieces, 22 , 32 is a channel material, 23, 33 are upper L-shaped brackets, 24, 34 are lower L-shaped brackets, 23a, 33a are fixed pieces, 23b, 33b are standing pieces, 40 is the truck bed, 41 is the floor, 42 is a tailgate, and GL is the installation surface. In each figure, X is the left-right direction, Y is the front-back direction, and Z is the up-down direction, and the floor 41, the tailgate 42, and the installation surface GL are indicated by dashed double-dashed lines. As shown in the figure, the truck bed step with fixing device 1 is composed of a truck bed step 10 and step fixing devices 20, 30, and is attached to a truck bed 40.

[0018] [Truck bed steps] The truck bed step 10 includes posts 11, 12, short brackets 13, 14, long brackets 15, 16, treads 17, 18, and handrails 19a, 19b. The support 11 is a short support used in wedge-type scaffolding (wedge-fastening type scaffolding), and is composed of a vertical pipe 11a, an upper pocket metal fitting portion 11b, and a lower pocket metal fitting portion 11c as shown in FIG. The upper pocket fitting portion 11b consists of four pocket fittings 11b1-11b4 arranged at 90 degree intervals with steps in the circumferential direction of the vertical pipe 11a, and the pocket fittings 11b1-11b4 have a U-shaped horizontal cross section and form a space between the circumferential surface of the vertical pipe 11a into which a wedge portion such as a handrail can be fitted. The lower pocket fitting part 11c has the same structure as the upper pocket fitting part 11b and is made up of four pocket fittings 11c1 to 11c4. The interval (distance) between the upper pocket fitting part 11b and the lower pocket fitting part 11c is 450 mm to 500 mm. Pillar 12 is the same as pillar 11 and comprises a vertical pipe 12a, an upper pocket fitting portion 12b consisting of four pocket fittings 12b1-12b4, and a lower pocket fitting portion 12c consisting of four pocket fittings 12c1-12c4.

[0019] The short bracket 13 is a short bracket used for wedge-type scaffolding, and as shown in FIG. 6(a), is composed of a horizontal pipe 13a, wedge portions 13b and 13c, a support member 13d, and the like. In the short bracket 13, wedge portions 13b, 13c are attached to both ends of a horizontal pipe 13a having a length of 300 to 600 mm, and a support member 13d consisting of a diagonal member and a vertical member is attached to the lower peripheral surface of the horizontal pipe 13a. The short bracket 14 is the same as the short bracket 13, and is composed of a horizontal pipe 14a, wedge portions 14b and 14c, and a support member 14d. The long bracket 15 is a long bracket used for wedge-type scaffolding, and as shown in FIG. 6(b), is composed of a horizontal pipe 15a, wedge portions 15b and 15c, a support member 15d, and the like. In the long bracket 15, wedges 15b, 15c are attached to both ends of a horizontal pipe 15a having a length of 600 to 1000 mm, and a support member 15d consisting of a diagonal member and a vertical member is attached to the lower peripheral surface of the horizontal pipe 15a. The long bracket 16 is the same as the long bracket 15, and is composed of a horizontal pipe 16a, wedge portions 16b and 16c, and a support member 16d. The tread 17 is used as a floor material for scaffolding assembled using single-tube pipes, such as for wedge-type scaffolding, and as shown in Figure 6(c), it consists of a rectangular outer frame 17a, a net 17b attached to the inside of the outer frame 17a, and four hooks 17c, 17d, 17e, and 17f attached to the four corners of the outer frame 17a and for hanging on the pipes. The length of the long side of the step board 17 (the distance in the X direction from the center of the hook 17c to the center of the hook 17d) is 400 to 900 mm, and the length of the short side (the length in the Y direction) is 240 to 500 mm. The step 18 is the same as the step 17, and comprises an outer frame 18a, a net 18b, and four hooks 18c, 18d, 18e, and 18f. The handrail 19a is a horizontal member that connects the supports of the wedge-type scaffolding, and is composed of a horizontal pipe 19a1 having a length of 400 to 900 mm, and wedge portions 19a2 and 19a3 attached to both ends of the horizontal pipe 19a1, as shown in FIG. 6(d). Handrail 19b is the same as handrail 19a and is composed of a horizontal pipe 19b1 and wedges 19b2 and 19b3 attached to both ends of horizontal pipe 19a1. In addition, the steps in this invention are not limited to those with mesh 17b, 18b attached like the steps 17, 18, but may be any plate-shaped scaffolding material used as a walkway or work floor for workers, such as an anti or scaffolding plank, which uses a steel plate with holes instead of the mesh of the steps, and which can be attached to a horizontal pipe, etc.

[0020] [Step Fixture] The step fixture 20 is made of metal (for example, steel, stainless steel, or aluminum), and is composed of an angle member 21, a channel member 22, an upper L-shaped metal fitting 23, and a lower L-shaped metal fitting 24 as shown in FIG. The angle iron 21 serves as a support bone of the present invention, is long in the Z direction (up-down direction), and is made up of a base piece 21a extending in the X direction (left-right direction) and a protruding piece 21b extending in the Y direction (front-back direction). The channel member 22 serves as the carrier engaging portion of the present invention, and is attached to the upper end rear side of the base piece 21a of the angle member 21 by welding or the like. The depth (length in the Y direction) of the U-shaped inner part of the channel material 22 is slightly (a few mm or less) larger than the thickness of the side panel 42 of the truck bed 40. The upper L-shaped metal fitting 23 is the first mating support part of the present invention, and is an L-shaped plate that protrudes toward the front side, consisting of a fixed piece 23a extending in the Y direction and an upright piece 23b that is continuous with the fixed piece 23a and extends in the Z direction. The lower L-shaped metal fitting 24 is the second mating support part of the present invention and has the same structure as the upper L-shaped metal fitting 23. It consists of a fixed piece 24a extending in the Y direction and an upright piece 24b that is continuous with the fixed piece 24a and extends in the Z direction, and is an L-shaped plate that protrudes toward the front side. Then, the upper L-shaped bracket 23 is attached by welding or the like to the front upper part of the angle iron 21 at a first position P1 (position in the Z direction) such that the upper end of the upright piece 23b is at the same height as the upper end of the angle iron 21 (at this time, the back surface of the fixed piece 23a is abutted against the front upper part of the base piece 21a, the right side surface of the fixed piece 23a is abutted against the upper left side surface of the protruding piece 21b, and the center in the Z direction of the back surface of the fixed piece 23a becomes the first position P1), and the lower L-shaped bracket 24 is attached by welding or the like to the front lower part of the angle iron 21 at a second position P2 (position in the Z direction) such that the lower end of the fixed piece 24a is at the same height as the lower end of the angle iron 21 (at this time, the back surface of the fixed piece 24a is abutted against the front lower part of the base piece 21a, the right side surface of the fixed piece 24a is abutted against the lower left side surface of the protruding piece 21b, and the center in the Z direction of the back surface of the fixed piece 24a becomes the second position P2). In this case, the distance between the first position P1 and the second position P2 (the distance between the upper L-shaped metal fitting 23 and the lower L-shaped metal fitting 24) is the same as the distance between the upper pocket metal fitting portion 11b and the lower pocket metal fitting portion 11c of the support 11 to which the step fixing device 20 is attached.

[0021] Step fixing device 30 is the same as step fixing device 20, and consists of an angle material 31 that is the same as angle material 21, a channel material 32 that is the same as channel material 22, and an upper L-shaped bracket 33 and a lower L-shaped bracket 34 that are the same as upper L-shaped bracket 23 and lower L-shaped bracket 24 (see Figure 7). In this case, the attachment position of the channel material 32 to the angle material 31 is the same as the attachment position of the channel material 22 to the angle material 21. In addition, the first position Q1 (position in the Z direction) at which the upper L-shaped bracket 33 is attached to the angle iron 31 is the same as the first position P1 at which the upper L-shaped bracket 23 is attached to the angle iron 21, and the second position Q2 (position in the Z direction) at which the lower L-shaped bracket 34 is attached to the angle iron 31 is the same as the second position P2 at which the lower L-shaped bracket 24 is attached to the angle iron 31. In addition, the mounting positions of the channel materials 22, 32 in the step fixing devices 20, 30, the first positions P1, Q1 for mounting the upper L-shaped brackets 23, 33, and the second positions P2, Q2 for mounting the lower L-shaped brackets 24, 34 are not limited to the above positions, but are appropriately selected depending on the height of the loading platform 40 (floor 41, tailgate 42 in the folded down state) to which the step fixing devices 20, 30 are attached, etc. Specifically, the position of the channel members 22, 32 may be a position below the upper end of the angle members 21, 31 if they are at the upper part of the angle members 21, 31 (for example, the position of the channel members 22, 32 may be the same as the position of the fixing pieces 23a, 24a of the upper L-shaped brackets 23, 33), the first positions P1, Q1 may be a position where the upper ends of the upright pieces 23b, 33b are below or above the upper ends of the angle members 21, 31 if they are at the upper part of the angle members 21, 31, and the second positions P2, Q2 may be a position where the lower end of the fixing piece 24a is above the lower end of the angle member 21 if they are at the lower part of the angle members 21, 31.

[0022] [How to assemble truck bed steps with fixings] Figure 8(a) is a perspective view of step fixing devices 20, 30 attached to a truck bed 40, Figure 8(b) is a perspective view of step fixing devices 20, 30 attached to posts 11, 12, and Figure 9 is a perspective view of short brackets 13, 14 and long brackets 15, 16 attached to posts 11, 12. A method for assembling the truck bed step 1 with the fasteners will be described below with reference to Figs. In this case, the truck bed 40 is provided with a floor 41 and tailgates 42 (side tailgates, rear tailgates) surrounding the floor 41, and the tailgates 42 are kept in a tilted down position. First, as shown in FIG. 8( a ), the step fixture 20 is placed on the left side and the step fixture 30 is placed on the right side, and the channel material 22 of the step fixture 20 and the channel material 32 of the step fixture 30 are fitted into the frame of the gate 42 . The depth (length in the Y direction) of the U-shaped inner portion of the channel materials 22, 32 is slightly (a few mm or less) larger than the thickness (length in the Y direction) of the gate 42, and a small gap (a few mm or less) is formed in the Y direction between the channel materials 22, 32 and the frame of the gate 42, allowing the step fixing devices 20, 30 to move in the X direction. Next, as shown in FIG. 8(b), the support pillar 11 is attached to the step fixture 20, and the support pillar 12 is attached to the step fixture 30. Specifically, the upper L-shaped metal fitting 23 (upright piece 23b) of the step fixing device 20 is fitted into the pocket fitting 11b3 of the upper pocket fitting portion 11b of the support 11, and the lower L-shaped metal fitting 24 (upright piece 24b) of the step fixing device 20 is fitted into the pocket fitting 11c3 of the lower pocket fitting portion 11c of the support 11, and the support 11 is attached to the step fixing device 20. In addition, the upper L-shaped metal fitting 33 (upright piece 33b) of the step fixing device 30 is fitted into the pocket fitting 12b3 of the upper pocket fitting portion 12b of the support 12, and the lower L-shaped metal fitting 34 (upright piece 34b) of the step fixing device 30 is fitted into the pocket fitting 12c3 of the lower pocket fitting portion 12c of the support 12, and the support 12 is attached to the step fixing device 30. After this, wedge portions 19a2, 19a3 of handrail 19a are respectively fitted into pocket fitting 11b2 of upper pocket fitting portion 11b of support 11 and pocket fitting 12b3 of upper pocket fitting portion 12b of support 12, and wedge portions 19b2, 19b3 of handrail 19b are respectively fitted into pocket fitting 11b2 of upper pocket fitting portion 11b of support 11 and pocket fitting 12b3 of upper pocket fitting portion 12b of support 12, and the support pillars 11 and 12 are connected by handrails 19a, 19b. At this time, the mounting positions of the upper L-shaped bracket 23 and the lower L-shaped bracket 24 relative to the step fixing device 20 are set so that the lower surfaces of the posts 11, 12 attached to the step fixing devices 20, 30 contact the installation surface GL, and the mounting positions of the upper L-shaped bracket 33 and the lower L-shaped bracket 34 relative to the step fixing device 30 are set.

[0023] Next, short brackets 13, 14 are attached to the upper parts of the posts 11, 12, and long brackets 15, 16 are attached to the lower parts of the posts 11, 12, as shown in FIG. Specifically, at the upper part of the support pillar 11, the wedge portion 13b of the short bracket 13 is fitted into the pocket fitting 11b1 of the upper pocket fitting portion 11b of the support pillar 11, and the end of the diagonal member of the support member 13d of the short bracket 13 is placed against the circumferential surface of the support pillar 11, thereby attaching the short bracket 13 to the support pillar 11. Similarly, the wedge portion 14b of the short bracket 14 is fitted into the pocket fitting 12b1 of the upper pocket fitting portion 12b of the support 12, and the end of the diagonal member of the support member 14d of the short bracket 14 is placed against the circumferential surface of the support 12, thereby attaching the short bracket 14 to the support 12. In addition, at the lower part of the support pillar 11, the wedge portion 15b of the long bracket 15 is fitted into the pocket metal fitting 11c1 of the lower pocket metal fitting portion 11c of the support pillar 11, and the end of the diagonal member of the support member 15d of the long bracket 15 is placed against the circumferential surface of the support pillar 11, thereby attaching the long bracket 15 to the support pillar 11. Similarly, the wedge portion 16b of the long bracket 16 is fitted into the pocket fitting 12c1 of the lower pocket fitting portion 12c of the support 12, and the end of the diagonal member of the support member 16d of the long bracket 16 is placed against the circumferential surface of the support 11, thereby attaching the long bracket 16 to the support 12. Finally, hooks 17c and 17e of step 17 onto horizontal pipe 13a of short bracket 13, and hook hooks 17d and 17f of step 17 onto horizontal pipe 14a of short bracket 14, so that step 17 is attached across short brackets 13 and 14 (see FIG. 1). Similarly, hooks 18c and 18e of the step 18 are hooked to the horizontal pipe 15a of the long bracket 15, and hooks 18d and 18f of the step 18 are hooked to the horizontal pipe 16a of the long bracket 16, so that the step 18 is attached across the long brackets 15 and 16 (see FIG. 1). In this manner, the steps for ascending and descending to the truck bed 40 (floor 41) are attached, and the truck bed step 1 with fixing devices is assembled.

[0024] As described above, the truck bed step 1 with fixing devices comprises a truck bed step 10 and a pair of step fixing devices 20, 30 that fix the truck bed step 10 to the truck bed 40. The truck bed step 10 comprises a pair of posts 11, 12, a pair of short brackets 13, 14, a pair of long brackets 15, 16, treads 17, 18 and handrails 19a, 19b. The pair of posts 11, 12 each have upper pocket metal fittings portions 11b, 12b and lower pocket metal fittings portions 11c, 12c. The short brackets 13, 14 are attached to the upper pocket metal fittings portions 11b, 12b of the posts 11, 12. The long brackets 15, 16 are attached to the upper pocket metal fittings portions 11c, 12c of the posts 11, 12. The tread 17 is attached across the short brackets 13, 14, and the tread 18 is attached across the long brackets 15, 16. The step fixing devices 20, 30 also include angle irons 21, 31 that are long in one direction, channel materials 22, 32 that are attached to the upper parts of the angle irons 21, 31 and protrude from the back side of the angle irons 2, 31, upper L-shaped brackets 23, 33 that are attached to first positions P1, Q1 of the angle irons 21, 31 and protrude from the front side of the angle irons 22, 31, and lower L-shaped brackets 24, 34 that are attached to second positions P2, Q2 below the first positions P1, Q1 of the angle irons 21, 31 and protrude from the front side of the angle irons 2, 31. In the step 1 for a truck bed with a fixing device, the channel members 22, 32 of the step fixing devices 20, 30 are fitted into the frame of the side panel 42 of the truck bed 40, the upper pocket metal fittings 11b, 12b (pocket metal fittings 11b3, 12b3) of the posts 11, 12 are fitted into the upper L-shaped metal fittings 23, 33 (standing pieces 23b, 33b) of the step fixing devices 20, 30, and the lower pocket metal fittings 11b, 12b (pocket metal fittings 11b3, 12b3) of the posts 11, 12 are fitted into the lower L-shaped metal fittings 24, 34 (standing pieces 24b, 34b) of the step fixing devices 20, 30. By simply fitting in 2c, 12c (pocket fittings 11c3, 12c3), the scaffolding members, the posts 11, 12, can be easily attached to the truck bed 40, and by simply attaching the scaffolding members, the short brackets 13, 14, the long brackets 15, 16, the treads 17, 18, and the handrails 19a, 19b, to the posts 11, 12, the truck bed step 10 can be easily assembled, and the assembled truck bed step 10 can be easily removed from the truck bed 40. [Industrial Applicability]

[0025] The step fixing device for truck beds of the present invention allows bed steps using scaffolding members to be easily attached to the bed of a truck and assembled, and the assembled bed steps can be easily removed from the bed of the truck, making it possible to use it as a lifting device for truck beds using various scaffolding members. [Explanation of symbols]

[0026] 1 Truck bed step with fixings 10 Truck bed steps 11, 12 posts 11a, 12a Vertical pipe 11b, 12b Upper pocket metal fittings 11c, 12c Lower pocket metal fittings 11b1~11b4, 11c1~11c4, 12b1~12b4, 12c1~12c4 Pocket fittings 13, 14 Short bracket 13a, 14a Horizontal pipe 13b, 13c, 14b, 14c Wedge section 13d, 14d Support material 15, 16 Long bracket 15a, 16a Horizontal pipe 15b, 15c, 16b, 16c Wedge section 15d, 16d Support material 17, 18 Treadboard 17a, 18a outer frame 17b, 17b net 17c, 17d, 17e, 17f, 18c, 18d, 18e, 18f hooks 19a, 19b Handrails 19a1, 19b1 Horizontal pipe 19a2, 19a3, 19b2, 19b3 Wedge section 20, 30 step fixture 21, 31 Angle iron 21a, 31a base piece 21b, 31b protruding piece 22, 32 Channel material 23, 33 Upper L-shaped bracket 24, 34 Lower L-shaped bracket 23a, 33a Fixed piece 23b, 33b standing piece 40 Truck Bed 41 Beds 42 Aori GL installation surface

Claims

1. A supporting bone that is long in one direction, a bed engaging portion attached to an upper portion of the support bone, protruding from a rear side of the support bone and engaging with a truck bed; a first fitting support part attached to a first position of the support rib, protruding from a front side of the support rib, and fitted into one of the pocket fittings of a pocket fitting-equipped support post to which a tread plate serving as a step is attached, thereby supporting the pocket fitting-equipped support post; a second fitting support portion attached to the support bone at a second position lower than the first position, protruding toward the front side of the support bone, and fitted into another pocket fitting of the pocket fitting support column to support the pocket fitting support column; Step fixings for truck beds with.

2. The step fixing device for a truck bed according to claim 1, characterized in that the first mating support portion and the second mating support portion have an upright piece extending along the longitudinal axis of the support bone and fitted into the pocket fitting.

3. 3. The step fixing device for a truck bed according to claim 1, wherein the support frame is made of a metal angle bar.

4. A pair of step fixtures attached to a truck bed; a pair of pocket metal fitting posts supported by the pair of step fixing devices, a pair of brackets attached to each of the pair of pocket bracket posts; A step plate attached across the pair of brackets A truck bed step with a fixing device, comprising: The step fixture is A supporting bone that is long in one direction, a bed engaging portion attached to an upper portion of the support bone, protruding from a rear side of the support bone, and engaging with the bed of the truck; a first engagement support portion attached to a first position of the support rib, protruding toward a front side of the support rib, and fitted into one of the pocket fittings of the pocket fitting column to support the pocket fitting column; a second fitting support portion attached to the support bone at a second position lower than the first position, protruding toward the front side of the support bone, and fitted into another pocket fitting of the pocket fitting support column to support the pocket fitting support column; A step for a truck bed with a fixing device, comprising:

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