Step ladder auxiliary step

Abstract

Provides auxiliary steps for step ladders. [Solution] An auxiliary step 1 for a stepladder, which is attached to a stepladder 2 having two pairs of support columns 3 arranged opposite each other in an inverted V shape and a step 4 of a predetermined width stretched between the support columns 3 in each pair, comprises a flat step portion 7 whose ends are stretched across the upper surfaces of a pair of horizontally opposing step 4, and a pair of outward slip prevention portions provided on the lower surface of the step portion 7, which engage with the inner surfaces of the pair of step columns 4 to prevent the step portion 7 from slipping outward.

Description

【Technical Field】 【0001】 The present invention relates to an auxiliary step for a step ladder used by attaching it to a step ladder. 【Background Art】 【0002】 Conventionally, various types of such auxiliary steps for step ladders have been proposed. 【0003】 For example, in Patent Document 1, a latching portion provided at the front end of a tread is hooked on the upper one of two footholds on one span of a step ladder, and the tip of a support member provided near the rear end of the tread is attached to the lower foothold in a state where the tread projects. An auxiliary stand for a step ladder is disclosed. 【0004】 Also, in Patent Document 2, a step ladder is disclosed in which a step bar cover, which is rotatably attached to the step bars at both ends and connected in a foldable manner at the center, is installed between pairs of opposing step bars between two pairs of leg columns. 【Prior Art Documents】 【Patent Documents】 【0005】 【Patent Document 1】 Japanese Utility Model Publication No. 1-83899 【Patent Document 2】 Japanese Utility Model Registration No. 3181185 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0006】 However, in the former case, the step ladder cannot be raised or lowered with the auxiliary stand for the step ladder attached. 【0007】 Also, in the latter case, since the step bar cover is attached to the step bars with hinges, it cannot be detached. 【0008】 The present invention has been made based on the above circumstances, and its purpose is to provide an auxiliary step for a stepladder that allows the user to climb up and down the stepladder while it is attached, and that can be easily attached and detached. [Means for solving the problem] 【0009】 To solve the above problems, the auxiliary step for a stepladder according to the present invention is an auxiliary step for a stepladder that is attached to a stepladder having two pairs of support columns arranged opposite each other in an inverted V shape and a step rail of a predetermined width stretched between each pair of support columns, and is characterized by comprising a flat plate-shaped step portion whose ends are stretched across the upper surfaces of a pair of horizontally opposing step rails, and a pair of outward slip prevention portions provided on the lower surface of the step portion and engaging with the inner surfaces of the pair of step rails to prevent the step portion from slipping outward. [Effects of the Invention] 【0010】 According to the auxiliary step for stepladders of the present invention, it is possible to climb up and down the stepladder while it is attached, and it can also be easily attached and detached. [Brief explanation of the drawing] 【0011】 The drawings illustrate specific embodiments of the present invention, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] A perspective view showing an auxiliary step for a stepladder according to the first embodiment of the present invention. [Figure 2] A plan view showing auxiliary steps for the same step ladder. [Figure 3] A perspective view showing the auxiliary steps for the stepladder. [Figure 4] Side view showing the auxiliary step for the stepladder. [Figure 5] Front view showing the auxiliary step for the stepladder. [Figure 6] A perspective view showing the auxiliary step for the ladder from below. [Figure 7] A bottom view showing the auxiliary step for the stepladder. [Figure 8]Exploded perspective view showing the auxiliary step for single-leg standing. [Figure 9] Front view in partial cross-section for explaining the attachment of the auxiliary step for single-leg standing. [Figure 10] Perspective view showing the storage state of the auxiliary step for single-leg standing. [Figure 11] Perspective view showing the storage state of the auxiliary step for single-leg standing from another direction. [Figure 12] Front view showing the auxiliary step for a footstool according to the second embodiment of the present invention. [Figure 13] Perspective view showing the auxiliary step for single-leg standing from below. [Figure 14] Bottom view showing the auxiliary step for single-leg standing. [Figure 15] Exploded perspective view showing the auxiliary step for single-leg standing. [Figure 16] Perspective view showing the attachment part of the auxiliary step for single-leg standing. [Figure 17] Perspective view showing the attachment part of the auxiliary step for single-leg standing from below. [Figure 18] Exploded perspective view showing the attachment part of the auxiliary step for single-leg standing. [Figure 19] Front view in partial cross-section for explaining the attachment of the auxiliary step for single-leg standing. [Figure 20] Perspective view showing the auxiliary step for a footstool according to the third embodiment of the present invention. [Figure 21] Plan view showing the auxiliary step for single-leg standing. [Figure 22] Side view showing the auxiliary step for single-leg standing. [Figure 23] Front view showing the auxiliary step for single-leg standing. [Figure 24] Perspective view showing the auxiliary step for single-leg standing from below. [Figure 25] Bottom view showing the auxiliary step for single-leg standing. [Figure 26] Exploded perspective view showing the auxiliary step for single-leg standing. [Figure 27] Front view in partial cross-section for explaining the attachment of the auxiliary step for single-leg standing. [Figure 28]A front view showing an auxiliary step for a stepladder according to a fourth embodiment of the present invention. [Figure 29] A perspective view showing the auxiliary step for the ladder from below. [Figure 30] A bottom view showing the auxiliary step for the stepladder. [Figure 31] An exploded perspective view showing the auxiliary steps for the stepladder. [Figure 32] A front view showing a partial cross-section to illustrate the attachment of auxiliary steps for the ladder. [Modes for carrying out the invention] 【0012】 <First Embodiment> Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. 【0013】 In Figure 1, reference numeral 1 indicates an auxiliary step for a stepladder according to the first embodiment of the present invention, and this auxiliary step for a stepladder 1 is configured to be detachably attached to a stepladder 2. 【0014】 The stepladder 2 includes, for example, two pairs of support columns 3 arranged opposite each other in an inverted V shape, a step rail 4 of a predetermined width placed between the support columns 3 in each pair, two pairs of hinges 5 provided at the tops of the two pairs of support columns 3 to connect the two pairs of support columns 3 so that they can be opened and closed, and anti-slip devices 6 for protecting the lower ends of the support columns 3 and preventing slippage, as well as an opening stopper 22 for the stepladder 2. 【0015】 The step ladder auxiliary step 1 is equipped with a step plate section 7 whose ends are stretched across the upper surfaces of a pair of horizontally opposing rungs 4, and as shown in Figure 2, this step plate section 7 is formed in a rectangular and flat shape. 【0016】 As shown in Figure 3, a pair of inward displacement prevention parts 8 are connected to both ends of the tread portion 7, which engage with the outer surfaces of a pair of tread rails 4 to prevent the tread portion 7 from shifting inward. 【0017】 This inward displacement prevention portion 8 is formed by bending the tread plate portion 7 so that it hangs down from each of its two ends. 【0018】 Furthermore, as shown in Figures 4 to 8, a pair of first reinforcing parts 9 are connected to the front and rear sides of the tread portion 7 to reinforce the tread portion 7. 【0019】 This pair of first reinforcing parts 9 are formed by bending them so that they hang down from the front and rear sides of the tread plate 7, respectively. 【0020】 Furthermore, each of these pair of first reinforcing parts 9 is formed to be shorter than the length between the pair of treads 4, thereby securing a tread space 10 between the inward displacement prevention part 8 and the first reinforcing part 9 so that the lower surface of the tread plate part 7 can rest on the upper surface of the tread 4. 【0021】 Furthermore, the pair of first reinforcing parts 9 are connected in an H-shape by a plate-shaped second reinforcing part 11 provided on the lower surface side of the tread part 7. 【0022】 Furthermore, the lower surface of the tread portion 7 is provided with a pair of outward displacement prevention portions 12 that engage with the inner surfaces of the pair of tread rails 4 to prevent the tread portion 7 from shifting outward. 【0023】 This outward displacement prevention portion 12 includes an engaging member 13 that engages with the inner surface of the tread 4. 【0024】 The engaging member 13 is composed of a linear member 14, which comprises a horizontal portion 15 arranged parallel and horizontally to the tread 4, a pair of inclined portions 16 with one end connected to each end of the horizontal portion 15, a pair of mounting portions 17 with one end connected to the other end of the pair of inclined portions 16 and attached to the lower surface of the tread portion 7, an inner surface engaging portion 18 with one end connected to the other end of the pair of mounting portions 17 and engaging to the inner surface of the tread 4, and a lower surface engaging portion 19 with one end connected to one end of the pair of inner surface engaging portions 18 and engaging to the lower surface of the tread 4. 【0025】 The linear member 14 is detachably attached to the lower surface of the tread plate 7 by a mounting portion 17, a mounting portion 20, and a screw 21, and the position of the linear member 14 can be shifted by loosening the screw 21. 【0026】 When attaching the ladder auxiliary step 1 configured in this way to the ladder 2, as shown in Figure 9, place the step plate portion 7 on the rung 4, loosen the screw 21, adjust the position so that the inner surface engaging portion 18 of the linear member 14 contacts the inner surface of the rung 4, and then tighten the screw 21. 【0027】 This allows the auxiliary step 1 for the stepladder to be attached to the rung 4 of the stepladder 2. 【0028】 Furthermore, when storing the unit, it can be attached to the upper and lower foot rails 4, as shown in Figures 10 and 11, thereby saving space. 【0029】 With the above configuration, the auxiliary step 1 for the stepladder is designed so that both ends of the stepping board 7 are placed across the upper surfaces of a pair of horizontally opposing stepping bars 4, allowing the stepladder 2 to be climbed up and down while the stepladder 2 is attached. 【0030】 Moreover, it can be easily attached and detached simply by loosening the screw 21 and shifting the position of the linear member 14. 【0031】 <Second Embodiment> Next, a second embodiment of the present invention will be described with reference to the drawings. 【0032】 In this second embodiment, the outward displacement prevention portion 12 includes a compression coil spring (pressing member) 31 that elastically presses the linear member 14 of the engaging member 13 against the inner surface of the step 4, as shown in Figures 12 to 15. 【0033】 In other words, as shown in Figures 16 to 18, the mounting member 20 includes an L-shaped first mounting piece 32 that is attached to the tread portion 7 with screws 21, and an L-shaped second mounting piece 34 that is slidably inserted between the recess 33 formed in the first mounting piece 32 and the tread portion 7. 【0034】 The first mounting piece 32 has a pair of notches 35 into which the mounting portion 17 of the linear member 14 fits, and the second mounting piece 34 has a hole 36 through which the mounting portion 17 of the linear member 14 is inserted. 【0035】 Furthermore, a compression coil spring 31 is fitted onto the mounting portion 17 between the first mounting piece 32 and the second mounting piece 34, biasing the linear member 14 in a direction away from the first mounting piece 32 together with the second mounting piece 34, and pressing the inner surface engaging portion 18 against the foot rail 4. 【0036】 Furthermore, the tip of the second mounting piece 34 is provided with a retaining projection 37 that prevents it from coming out from between the recess 33 of the first mounting piece 32 and the lower surface of the tread plate 7. 【0037】 With this configuration, when attaching or detaching the step ladder auxiliary step 1 to the step ladder 2, the linear member 14 is slid to move closer to the second mounting piece 34 against the biasing force of the compression coil spring 31, as shown in Figure 19. 【0038】 Therefore, the auxiliary step 1 for the stepladder can be easily attached and detached. 【0039】 <Third Embodiment> Next, a third embodiment of the present invention will be described with reference to the drawings. 【0040】 In this third embodiment, the tread section 7 includes a first tread 41 and a second tread 42, as shown in Figures 20 and 21. 【0041】 As shown in Figures 22 to 26, a U-shaped rail section 43 is connected to the front and rear sides of the first step plate 41. This rail section 43 is formed by being continuous with the first step plate 41 and bent. 【0042】 Furthermore, slider sections 44, which slidably fit into the rail section 43, are connected to the front and rear sides of the second step plate 42. These slider sections 44 are formed by being continuous with the second step plate 42 and bent. 【0043】 As a result, the second tread plate 42 is configured to slide freely relative to the first tread plate 41. 【0044】 Furthermore, the first tread plate 41 has two screw holes 45 formed along the sliding direction. 【0045】 On the other hand, the second foot plate 42 has an elongated hole 46 formed along the sliding direction, corresponding to the screw hole 45. 【0046】 Then, by inserting screws 47 through the screw holes 45 and elongated holes 46 and tightening them with nuts 48, the first tread 41 and the second tread 42 can be fixed in the desired sliding position. 【0047】 With the above configuration, as shown in Figure 27, the width of the stepping board 7 can be set to the width of a pair of stepping bars 4 that correspond to the horizontal position of the stepladder 2. 【0048】 <Fourth Embodiment> Next, a fourth embodiment of the present invention will be described with reference to the drawings. 【0049】 In this fourth embodiment, the outward displacement prevention section 12 includes a plurality of stoppers 51, as shown in Figures 29 to 31. 【0050】 The stopper 51 comprises a stopper body 53 attached to the lower surface of the tread plate 7 with screws 52, a rod (contact member) 54 supported by the stopper body 53 so as to be able to extend and retract, and a biasing means (not shown) such as a spring that biases the rod 54 to extend and contact the inner surface of the tread 4. 【0051】 With this configuration, when attaching or detaching the step ladder auxiliary step 1 to the step ladder 2, as shown in Figure 32, the rod 54 can be easily attached by temporarily retracting it against the biasing force of the biasing means. 【0052】 The disclosure relating to the present invention described above can be summarized to at least the following: 【0053】 In other words, the auxiliary step for a stepladder according to the present invention is an auxiliary step for a stepladder that is attached to a stepladder having two pairs of support columns arranged opposite each other in an inverted V shape and a step rail of a predetermined width stretched between the support columns in each pair, and is characterized by comprising a flat plate-shaped step portion whose ends are stretched across the upper surfaces of a pair of horizontally opposing step rails, and a pair of outward slip prevention portions provided on the lower surface of the step portion and engaging with the inner surfaces of the pair of step rails to prevent the step portion from slipping outward. 【0054】 The present invention described above may include at least the following embodiments. These embodiments may be adopted separately or in combination with each other. 【0055】 (1) The tread portion is further provided with a pair of inward displacement prevention parts that hang down from each of the ends on both sides of the tread portion and engage with the outer surfaces of the pair of tread rails to prevent the tread portion from shifting inward. 【0056】 (2) The outward displacement prevention part is equipped with an engaging member that engages with the inner surface of the tread. 【0057】 (3) The engaging member is made of a linear member, and this linear member has an inner surface engaging portion that engages with the inner surface of the step. 【0058】 (4) The linear member is provided with a lower engagement portion that engages with the lower surface of the step. 【0059】 (5) The linear member comprises a horizontally positioned horizontal section, a pair of inclined sections with one end connected to each end of the horizontal section, a pair of mounting sections with one end connected to the other end of each of the pair of inclined sections and attached to the lower surface of the tread section, a pair of inner surface engaging sections, and a pair of the aforementioned lower surface engaging sections, wherein one end of each of the pair of inner surface engaging sections is connected to the other end of each of the pair of mounting sections, and one end of each of the pair of lower surface engaging sections is connected to one end of each of the pair of inner surface engaging sections. 【0060】 (6) The outward displacement prevention portion includes a pressing member that elastically presses the engaging member against the inner surface of the step. 【0061】 (7) The tread section comprises a first tread member and a second tread member that is slidably connected to the first tread member. 【0062】 (8) The outward displacement prevention portion includes a contact member that elastically contacts the inner surface of the tread. [Explanation of symbols] 【0063】 1. Auxiliary step for step ladder 2 step ladders 3 pillars 4 Stepping board 7. Tread section 8. Inward displacement prevention section 12 Outward displacement prevention section 13 Engaging member 14 Linear members 15 Horizontal part 16 Slope 17 Mounting part 18 Inner surface engagement portion 19 Lower engagement portion 31. Compression member (compression coil spring) 41 1st tread plate member 42 Second tread member 54 Contact member (rod)

Claims

[Claim 1] An auxiliary step for a stepladder, which is attached to a stepladder having two pairs of support posts arranged opposite each other in an inverted V shape, and a step rail of a predetermined width placed between the support posts in each pair, A flat tread portion whose ends are stretched across the upper surfaces of a pair of horizontally opposing treads, A pair of outward displacement prevention parts are provided on the lower surface side of the tread portion and engage with the inner surfaces of the pair of tread rails to prevent the tread portion from shifting outward, An auxiliary step for a stepladder, characterized by being equipped with the following features. [Claim 2] Furthermore, the auxiliary step for a stepladder according to claim 1 is characterized by comprising a pair of inward slip prevention parts that hang down from each of the ends of the step plate and engage with the outer surfaces of the pair of step rails to prevent the step plate from slipping inward. [Claim 3] The auxiliary step for a stepladder according to claim 1, characterized in that the outward displacement prevention portion is provided with an engaging member that engages with the inner surface of the step rail. [Claim 4] The auxiliary step for a stepladder according to claim 3, characterized in that the engaging member is made of a linear member, and the linear member has an inner surface engaging portion that engages with the inner surface of the step rail. [Claim 5] The auxiliary step for a stepladder according to claim 4, characterized in that the linear member has a lower engagement portion that engages with the lower surface of the step rail. [Claim 6] The linear member is, A horizontal section arranged horizontally, A pair of inclined sections, one end of which is connected to each end of the horizontal section, A pair of mounting parts, each having one end connected to the other end of the pair of inclined sections, are attached to the lower surface of the tread section. A pair of the aforementioned inner surface engaging portions, A pair of the aforementioned lower engagement portions, Equipped with, The pair of inner surface engaging portions are connected at one end to the other end of the pair of mounting portions, The pair of lower engagement portions are connected at one end to the other end of the pair of inner engagement portions. The auxiliary step for a stepladder according to feature 5. [Claim 7] The auxiliary step for a stepladder according to claim 3, characterized in that the outward displacement prevention portion includes a pressing member that elastically presses the engaging member against the inner surface of the step. [Claim 8] The stepping plate portion comprises a first stepping plate member and a second stepping plate member slidably connected to the first stepping plate member, as described in claim 1. [Claim 9] The auxiliary step for a stepladder according to claim 1, characterized in that the outward displacement prevention portion is provided with a contact member that elastically contacts the inner surface of the step rail.

Images