WO2009129680A1 - 一种人字梯 - Google Patents

一种人字梯 Download PDF

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Publication number
WO2009129680A1
WO2009129680A1 PCT/CN2008/072846 CN2008072846W WO2009129680A1 WO 2009129680 A1 WO2009129680 A1 WO 2009129680A1 CN 2008072846 W CN2008072846 W CN 2008072846W WO 2009129680 A1 WO2009129680 A1 WO 2009129680A1
Authority
WO
WIPO (PCT)
Prior art keywords
leg
pedal
front leg
longitudinal
herringbone ladder
Prior art date
Application number
PCT/CN2008/072846
Other languages
English (en)
French (fr)
Inventor
冷鹭浩
Original Assignee
Leng Luhao
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CNU2008201021147U external-priority patent/CN201228519Y/zh
Priority claimed from CNU2008201021132U external-priority patent/CN201232520Y/zh
Application filed by Leng Luhao filed Critical Leng Luhao
Priority to US12/671,077 priority Critical patent/US8381875B2/en
Priority to EP08874035A priority patent/EP2267267A1/en
Priority to CA2695024A priority patent/CA2695024C/en
Publication of WO2009129680A1 publication Critical patent/WO2009129680A1/zh

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/02—Ladders in general with rigid longitudinal member or members
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E06C1/18—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/086—Connections between rungs or treads and longitudinal members with a connecting piece inserted in a hollow rung
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/08—Special construction of longitudinal members, or rungs or other treads
    • E06C7/082—Connections between rungs or treads and longitudinal members
    • E06C7/087—Connections between rungs or treads and longitudinal members with a connecting piece installed around the rung
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/14—Holders for pails or other equipment on or for ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/50—Joints or other connecting parts

Definitions

  • the present invention relates to a herringbone ladder, and more particularly to a ladder that can be folded.
  • [2] Existing collapsible ladders including front legs, rear legs, pedals, folding devices, and trays.
  • the tray is a plastic member that directly pivots the tops of the front and rear legs together and forms a rotational connection between the front and rear legs.
  • the pallet plays the following two roles in the ladder: 1. Connecting the front and rear legs, 2, used as a platform in the ladder work. Since the plastic member directly pivots the front leg and the rear leg, there are the following disadvantages: First, the connection strength is insufficient, and the strength of the platform is insufficient; and second, the plastic member is pivotally connected to the front leg. And the rear legs, the connection is inconvenient to assemble.
  • the existing connection structure of the leg ladder and the pedal is generally the following two types:
  • the first connection structure ⁇ directly locks the leg tube and the pedal with the lock member; Use a through hole in the leg tube, and then insert the end of the pedal into the through hole and then lock it.
  • the first type of connecting structure has the following disadvantages: First, since the shearing force generated between the pedal and the leg tube is received by the locking member, the locking member is easily broken, the service life is short, and the safety performance is low; Most of the existing pedals are hollow structures, the locking components must be locked in the hollow pedals, the locking is inconvenient, and the assembly is inconvenient; thirdly, the pedals may rotate during application, and the safety performance is not high.
  • the second connecting structure has the following disadvantages: First, since the leg tube has a through hole, the leg tube strength is lowered, and in order to strengthen the leg tube strength, the leg tube cross section or the solid structure must be increased, which will greatly increase The amount of material used increases the manufacturing cost; secondly, the existing pedals are mostly hollow structures, and the locking members are locked in the hollow pedals, which are inconvenient to lock and inconvenient to assemble.
  • the present invention provides a herringbone ladder that overcomes the insufficient strength of the tray connection existing in the background ladder
  • the strength is not enough.
  • a further object of the present invention is to provide a herringbone ladder which overcomes the disadvantages of insufficient pedal connection strength in the prior art.
  • a further object of the present invention is to provide a herringbone ladder that overcomes the strength of the folding device that is present in the background art. Not enough.
  • a type of ladder comprising a front leg, a rear leg, a pedal, a folding device, a connecting device, and a tray; the tray connecting the front leg and the rear leg, the front leg and the rear leg Forming a rotating connection structure; the tray includes a body and a cross bar, the cross bar passing through the front leg, and a positioning groove matching the cross bar is disposed under the body, wherein the body is connected to the front leg, The positioning groove of the body is supported on the cross bar; the folding device is an H-shaped hinge installed in the middle of the front leg and the rear leg; the pedal is mounted on the leg by a connecting device.
  • the plurality of spaced apart lateral reinforcing ribs are formed under the body, and the concave ribs are formed with concave grooves matching the crossbars, and the grooves are arranged in a row and formed to be suitable
  • the positioning groove of the crossbar is provided.
  • the outer peripheral edge of the body extends downward to the periphery, wherein the body is connected to the front leg, and the outer sleeve is attached to the top of the leg.
  • the crossbar passes through the front leg and connects to the periphery.
  • the aforementioned H-shaped hinge includes a cross bar, a pair of front longitudinal bars and a pair of rear longitudinal bars;
  • the rear longitudinal bar is a U-shaped bar, the rear end of the front longitudinal bar is inserted into the rear longitudinal bar;
  • the front longitudinal bar The front end is fixed on the outer side of the two front legs; the rear ends of the two rear longitudinal rods are fixed on the outer sides of the two rear legs;
  • the cross bar is fixed between the two front longitudinal rods.
  • the foregoing connecting device comprises: a connecting member, the outer side of the connecting member is sleeved with the end of the pedal, the inner side is connected with the ladder leg, and is locked to the connecting member through a leg tube through a locking member.
  • the connecting member comprises an intermediate piece, a plug portion and a protruding portion, the plug portion and the protruding portion are respectively fixed before the intermediate piece, wherein the plug portion is adapted and inserted into the The inner circumference of the hollow pedal port; a longitudinal groove is formed in the leg tube, and the longitudinal groove is non-rotatably connected to the protruding portion of the connecting member.
  • the connecting piece is integrally formed, and the front surface of the intermediate piece is fixed on the back side of the plug portion, and the intermediate piece has a front protruding surface extending beyond the plug portion; wherein the plug portion is inserted into the hollow pedal port Weekly, the positively extending surface abuts the hollow pedal port.
  • the protrusion is fixed on the back surface of the intermediate piece, the intermediate piece has a back protrusion surface extending beyond the protrusion; wherein the protrusion is inserted into the longitudinal groove of the leg tube, the back extension
  • the leg tube is abutted against the leg tube, and the protruding portion is a strip-shaped bump that fits the longitudinal groove.
  • a further technical solution of the connecting device of the connecting device is: a positioning groove is formed on the front side of the connecting member, the inner circumference of the positioning groove section is matched with the outer circumference of the step portion of the stepped pedal end portion, and the pedal end portion is positioned and supported in the positioning groove , the connecting piece is fixedly connected with the leg tube.
  • the connecting member has a base and two protrusions respectively fixing the left and right sides of the base, the positioning groove is defined in the base, and the two protrusions protrude from the base, wherein the rear side of the base is fixed Abutting the first side of the leg tube, the two protrusions respectively abut the two second sides of the leg tube adjacent to the first side.
  • the first side surface of the leg tube is concavely formed with an intermediate groove
  • the base is convexly provided with an intermediate member which is located inside the intermediate groove and is tightly fitted therebetween.
  • the tray includes a body and a cross bar, the body is supported above the cross bar, so the tray itself has high strength. Since the cross bar connects the front leg, the tray connects the front leg through the cross bar, so the connection strength between the tray and the front leg is high. Since the positioning groove is provided under the body, the positioning groove is supported on the cross bar, so the positioning is accurate, and the support stability and the firmness are high. Since the reinforcing rib is formed under the body, it is easy to process and enhance the strength. Since the groove is formed under the reinforcing rib, the support between the cross bar and the body is accurately positioned.
  • the positioning strip is arranged under the reinforcing rib, the positioning strip is provided with a groove, so that the strength of the body itself can be increased, and the supporting strength between the cross bar and the body can be increased. Since the outer sleeve is sleeved to the top of the front leg, it is also aesthetically pleasing.
  • the crossbar passes through the front leg and is connected to the periphery, and the connection is firm and reliable, and the support strength is high. Since the rear leg is located inside the periphery, the appearance is beautiful. Since the positioning strip is fixed to the periphery, it can be integrally formed and has high connection strength.
  • the pedal is connected to the leg tube of the leg through the connecting member, the outer side of the connecting member is fixed to the leg tube, and the inner side is sleeved with the end portion of the pedal, so that it is not necessary to open the through hole in the leg tube, and the hollow pedal After the end portion is sleeved with the connecting member, the contact area with the leg tube is increased, and the strength is effectively enhanced. On the other hand, it is more convenient to fold the folding device with the H-shaped hinge, and the use stability is strong.
  • Figure 1 is a perspective view of a first embodiment of the present invention.
  • Embodiment 1 of the present invention is a perspective exploded view of Embodiment 1 of the present invention.
  • 3 is a bottom perspective view of Embodiment 1 of the present invention.
  • FIG. 4 is a perspective view of a tray according to Embodiment 1 of the present invention.
  • Figure 5 is a schematic view showing the structure of a hinge of the embodiment 1 of the present invention.
  • Figure 6 is a perspective view of a hinge of the embodiment 1 of the present invention.
  • FIG. 7 is a schematic structural view of a pedal connecting portion according to an embodiment of the present invention.
  • Fig. 8 is a partial enlarged view of Fig. 7.
  • FIG. 9 is a schematic cross-sectional view of a pedal according to Embodiment 1 of the present invention.
  • Figure 10 is a schematic cross-sectional view showing the pedal of the embodiment 2 of the present invention.
  • Figure 11 is a schematic cross-sectional view showing the pedal of Embodiment 3 of the present invention.
  • Figure 12 is a perspective view of a fourth embodiment of the present invention.
  • Figure 13 is a partially enlarged perspective exploded view of Embodiment 4 of the present invention.
  • Figure 14 is a perspective view of a connecting member according to a fourth embodiment of the present invention.
  • Embodiment 1 please refer to Figure 1, 2, 3, 4, 5, 6, 7, 8, 9, a herringbone ladder, which includes a front leg 100, a rear leg 200, a tray 300, The hinge 400, the pedal 500, and the connecting device 600.
  • the front legs 100 are mounted with a pedal 500 through the connecting device 600; the rear legs 200 are spaced apart from the rear rail or the pedal 500; the tray 300 is mounted on the top of the front leg 100 and the rear leg 200;
  • the hinge 400 is H-shaped and is mounted in the middle of the front leg 100 and the rear leg 200.
  • the tray 300 includes a body 310 and a crossbar 320.
  • the peripheral edge of the body 310 extends downwardly to form a periphery 311.
  • the body 310 is formed with a plurality of laterally extending reinforcing ribs 312 and a plurality of longitudinally extending reinforcing ribs 313, and the reinforcing ribs 312 and the reinforcing ribs 313 are fixed to the periphery 311.
  • Each of the lateral reinforcing ribs 312 is provided with a concave groove 314 which is arranged in a row and is formed to fit the positioning groove of the cross bar 320.
  • the positioning groove position is for the certain A longitudinal reinforcing rib 313.
  • the crossbar 320 has a circular cross section, and may be a non-circular shape such as a square or a hexagon.
  • the body 310 of the tray 300 is coupled to the front leg 100, and the periphery 311 is sleeved to the top end of the front leg 100; the cross bar 320 horizontally passes through the two front struts of the front leg 100.
  • the crossbar 320 is supported on the positioning slot of the body 310, and the through-out end of the crossbar 320 passing through the front leg 100 is inserted into the peripheral 311.
  • the fixed connection structure is formed between the tray 300 and the front leg 100.
  • the rear leg 200 is pivotally disposed under the body 310 and located within the periphery 311 for forming a rotational connection between the tray 300 and the rear leg 200, thereby causing the front leg 100 to be
  • a rotational connection structure is formed between the rear leg 200 and the rear leg 200.
  • Hinge 400 Please refer to FIG. 5 and FIG. 6.
  • the hinge 400 used as the folding device is H-shaped, including a cross bar 410, a pair of front longitudinal bars 420 and a pair of rear longitudinal bars 430; rear longitudinal bars 430
  • the rear end of the front longitudinal rod 420 is inserted into the rear longitudinal rod 430; the front end of the front longitudinal rod 420 is fixed to the outer side of the two front legs 100; the rear ends of the two rear longitudinal rods 430 are fixed to the rear.
  • the outer side of the leg 200 is disposed between the two front longitudinal rods 410.
  • the front longitudinal rod 420 is formed with a positioning boss 421 on the outer side, and a hand grip 411 is further disposed in the middle of the cross rod 410.
  • the hinge 400 is used to stabilize the ladder in the unfolded state.
  • the grip portion 411 is pulled downward, so that the rear end of the front longitudinal rod 420 is disengaged from the rear longitudinal rod 430, and the two are relatively rotated, and the boss 421 on the outer side of the front longitudinal rod 420 abuts.
  • Rear longitudinal rod 430 At the same time, the rear leg 200 is rotated relative to the tray 300, leaning against the forward leg 100.
  • the hollow pedal 500 includes a main body 510 having a triangular cross section, which includes a top plate and two lower plates.
  • An axial reinforcing bayonet 520 is disposed in the middle of the bottom surface of the top surface of the main body 510.
  • An axial reinforcing bayonet 530 is also disposed at an angle between the two lower mating plates.
  • a reinforcing sheet is connected between the two reinforcing bayonet ports 520 and 53 0. 540, the reinforcing piece 540 divides the inner hole of the hollow pedal 500 into two parts. Please refer to the applicant's prior patent ZL500520126388.6 for the specific structure of the pedal 500.
  • Connecting device 600 Please refer to Fig. 7, Fig. 8, the connecting device 600 includes a connecting member 610, a longitudinal recess 620, a spacer 630 and a locking member 640.
  • the longitudinal groove 620 is axially recessed within the front leg 100
  • the connector 610 includes an intermediate piece 611 integrally formed, a plug portion 612, and a projection 613.
  • the back of the plug portion 612 is fixed on the front surface of the intermediate piece 611.
  • the structure of the plug portion 612 is matched with the inner hole structure of the hollow pedal 500, and includes two separate portions separated from each other.
  • the protrusion 613 is fixed on the front surface of the intermediate piece 611, and the protrusion 613 is a strip-shaped protrusion that fits the longitudinal groove 612.
  • the intermediate piece 611 has a front protruding surface extending beyond the insertion portion 612 and has a rear extending surface extending beyond the protruding portion 613.
  • the insertion portion 612 of the connecting member 610 is inserted into the inner hole of the hollow pedal 500 (the two independent portions are respectively inserted into the corresponding portions of the inner hole), and the protruding portion 613 of the connecting member 610 is non-rotatably inserted into the longitudinal concave portion.
  • the front protruding surface of the intermediate piece 611 abuts the port of the hollow pedal 500, and the back protruding surface abuts the front leg 1 00. Since the inside of the hollow pedal 500 is divided into two parts, the insertion portion and the hollow pedal never rotate with each other.
  • the projection 613 has an interference fit with the longitudinal groove 620 as needed.
  • Gasket 630 abuts the outside of front leg 100.
  • the locking member includes two self-powered screws, and the two self-powered screws are arranged up and down, and the locking ends thereof are sequentially locked through the spacer 630, the front leg 100, the longitudinal groove 620, and the connecting member 610.
  • the projection 613 extends into the reinforcing bayonet. Among them, the friction between the gasket and the front leg can withstand partial shearing force and protect the leg tube.
  • Embodiment 2 please refer to 10, which differs from the previous preferred embodiment in that: the hollow pedal 500 includes a main body 510 and a reinforcing plate 520.
  • the main body 510 is a rectangular-like frame, which includes the upper portion.
  • a lower plate, the reinforcing plate 540 is connected between the upper and lower plates of the main body 510.
  • Embodiment 3 please refer to 11, which differs from the previous preferred embodiment in that: the hollow pedal 500 includes a main body 510, which is a rectangular-like frame, which includes upper and lower plates, An axial reinforcing bayonet 520 is disposed in the middle of the bottom surface of the upper plate, and an axial reinforcing bayonet 530 is disposed in the middle of the top surface of the lower plate.
  • a main body 510 which is a rectangular-like frame, which includes upper and lower plates
  • An axial reinforcing bayonet 520 is disposed in the middle of the bottom surface of the upper plate
  • an axial reinforcing bayonet 530 is disposed in the middle of the top surface of the lower plate.
  • Embodiment 4 Referring to Figures 12, 13, and 14, the difference between this embodiment and Embodiment 1 is mainly that the connection between the pedal 500 and the front leg 100 is different.
  • Connecting device 700 Includes connector 760, stiffener 770 and locking screw 780.
  • the connecting member 760 has a base 761 of a type of 'ten', two protrusions 762 respectively fixed to the left and right sides of the base 761 and protruding rearward, and two front and rear sides of the base 761 are respectively fixed and protruded rearward.
  • the middle piece 763, the two protrusions 762 and the two middle pieces 763 protrude from the base 761.
  • the base 761 is provided with a positioning groove 764 at the front, and the outer circumference of the positioning groove 764 is matched with the outer circumference of the end portion of the pedal 500.
  • the end of the pedal 500 is positioned and supported in the positioning groove 764 of the connecting member 760.
  • the rear side of the base 761 is fixed to the first side of the front leg 100 by the reinforcing piece 770, and the two protrusions 762 abut against the second side of the front leg 100 adjacent to the first side (two The two sides are respectively left and right sides, and the intermediate piece 763 is located inside the intermediate groove 64 and is tightly fitted therebetween.
  • the reinforcing sheet 770 is located in the intermediate groove 64 and is fixed between the connecting member 760 and the front leg 100.
  • a screw 780 is also provided, the threaded end of which is secured through the front leg 100 and the connector 760 and into the bayonet 520 of the pedal 500.
  • the present invention may be a single-sided herringbone ladder, that is, a pedal is installed between the two front legs, and a support crossbar is installed between the two rear legs; or a double-sided herringbone ladder, that is, between the two front legs, A pedal is placed between the two rear legs.
  • a herringbone ladder includes a front leg, a rear leg, a pedal, a folding device, a connecting device, and a tray; the tray includes a body and a cross bar, the cross bar passing through the front leg A positioning groove matching the crossbar is disposed under the body, and the folding device is an H-shaped hinge installed in the middle of the front leg and the rear leg; the pedal is mounted on the leg by a connecting device.
  • the utility model has the advantages of simple structure, good use effect, high component strength and good industrial applicability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Description

说明书 一种人字梯
技术领域
[1] 本发明涉及一种人字梯， 尤其涉及一种可以折叠的人字梯。
背景技术
[2] 现有可折叠人字梯， 包括前支腿、 后支腿、 踏板、 折叠装置以及托盘。 该托盘 为塑料件， 它同吋直接枢接该前支腿和后支腿的顶部， 并使该前支腿和该后支 腿之间构成转动连接结构。 该托盘在该人字梯中起到了以下两个作用： 1， 连接 前支腿和后支腿， 2， 在梯子工作中作为平台使用。 由于该塑料件直接枢接该前 支腿和后支腿， 因此存在有如下的不足： 其一， 连接强度不够， 作为平台吋强 度不够； 其二， 该塑料件同吋枢接该前支腿和后支腿， 连接装配不便。
[3] 同吋， 现有的人字梯其腿管与踏板的连接结构一般有以下两种： 第一种连接结 构釆用锁接件直接锁接腿管与踏板； 第二种连接结构釆用在腿管开设通孔， 然 后踏板端部插入通孔后再锁接。 该第一种连接结构存在有如下不足： 其一， 由 于踏板和腿管之间产生的剪切力都由锁接件承受， 因此锁接件易断裂， 使用寿 命短， 安全性能低； 其二， 现有的踏板大多釆用空心结构， 锁接件必须锁接在 空心踏板内， 锁接不便， 装配不便； 其三， 踏板在应用过程中可能会出现转动 ， 安全性能不高。 该第二种连接结构存在有如下不足： 其一， 由于腿管开设通 孔， 因此腿管强度降低， 为了增强腿管强度就必须增加腿管横截面或釆用实心 结构， 而这将大大增加材料用量， 增加制造成本； 其二， 现有的踏板大多釆用 空心结构， 锁接件锁接在空心踏板内， 锁接不便， 装配不便。
发明内容
[4] 本发明提供一种人字梯， 其克服了背景技术人字梯所存在的托盘连接强度不够
、 作为平台吋强度不够的不足。
[5] 本发明的又一目的提供一种人字梯， 其克服背景技术所存在踏板连接强度不够 的不足。
[6] 本发明的再一目的是提供一种人字梯， 其克服背景技术所存在折叠装置强度不 够的不足。
[7] 本发明解决其技术问题所釆用的技术方案之一是：
[8] —种人字梯， 包括前支腿、 后支腿、 踏板、 折叠装置、 连接装置以及托盘； 该 托盘连接该前支腿和后支腿， 该前支腿和该后支腿之间构成转动连接结构； 该 托盘包括一本体以及一横杆， 该横杆穿过该前支腿， 该本体之下设有匹配横杆 的定位槽， 其中， 该本体连接该前支腿， 该本体的定位槽支撑在该横杆之上； 折叠装置为 H型铰链， 安装在在前支腿和后支腿的中部； 踏板通过连接装置安装 在支腿上。
[9] 前述本体之下成型有多根间隔并排的横向的加强筋条， 该加强筋条之下形成有 上凹的匹配横杆的凹槽， 该些凹槽排成纵列并形成为适配该横杆的定位槽。
[10] 或前本体之下成型有多根间隔并排的横向的加强筋条以及一纵向的定位条， 该 定位条交叉连接该些加强筋条， 定位条之下设有匹配横杆的定位槽。
[11] 本体外周边缘向下延伸成外围， 其中， 本体连接在前支腿， 外围套接支腿顶端
， 横杆穿过前支腿并连接该外围。
[12] 前述 H型铰链包括一横杆， 一对前纵杆和一对后纵杆； 后纵杆为 U型杆件， 前 纵杆的后端插入后纵杆内束接； 前纵杆的前端固定在两前支腿的外侧； 两后纵 杆的后端固定在两后支腿的外侧； 横杆固定在两前纵杆之间。
[13] 前述连接装置包括： 一连接件， 连接件外侧面与踏板端部套接， 内侧面与梯腿 连接， 并通过一锁接件穿过腿管再锁接在该连接件。
[14] 连接件包括一中间片、 一插接部以及一凸出部， 该插接部和凸出部分别固设在 该中间片之前后， 其中， 该插接部适配并插接进该空心踏板端口内周； 在腿管 上开设一纵向凹槽， 纵向凹槽不可转动地连接该连接件的凸出部。
[15] 连接件一体成型， 中间片正面固设在该插接部背面， 该中间片具有伸出该插接 部之外的正伸出面； 其中， 该插接部插接进该空心踏板端口内周， 该正伸出面 靠接该空心踏板端口。
[16] 中间片背面固设该凸出部， 该中间片具有伸出该凸出部之外的背伸出面； 其中 ， 该凸出部插接进该腿管的纵向凹槽， 该背伸出面靠接该腿管， 该凸出部为适 配该纵向凹槽的条状凸块。 [17] 前述连接装置的连接件又一技术方案为： 连接件前侧面开设有定位槽， 定位槽 截面内周与梯蹬踏板端部截面外周相匹配， 踏板端部定位支撑于该定位槽内， 连接件与腿管之间固接连接。
[18] 前述连接件具有一基座以及两分别固设基座左右侧的凸块， 该定位槽开设于基 座， 该两凸块伸出于基座之后， 其中， 该基座后侧面固定靠接腿管的第一侧面 ， 该两凸块分别靠接腿管的两相邻于第一侧面的第二侧面。
[19] 前述凸块与腿管的第二侧面之间的靠接为紧靠接。
[20] 前述腿管的第一侧面内凹形成中间槽， 该基座向后凸设有中间件， 该中间件位 于中间槽之内， 且其之间紧配合。
[21] 本技术方案与背景技术相比： 由于该托盘包括有本体和横杆， 该本体支撑在该 横杆之上， 因此该托盘自身强度高。 由于该横杆连接该前支腿， 该托盘通过该 横杆连接该前支腿， 因此该托盘和前支腿之间的连接强度高。 由于该本体之下 设有定位槽， 该定位槽支撑在该横杆之上， 因此定位准确， 支撑稳定性、 牢固 性高。 由于该本体之下成型有加强筋条， 因此便于加工， 增强强度。 由于该加 强筋条之下形成有凹槽， 因此横杆和本体之间的支撑定位准确。 由于该加强筋 条之下设有定位条， 该定位条上设有凹槽， 因此不但可增加该本体自身强度， 而且还可增加横杆和本体之间的支撑强度。 由于该外围套接该前支腿顶端， 因 此外观美观。 该横杆穿过该前支腿并连接该外围， 连接牢固、 可靠， 支撑强度 高。 由于该后支腿位于该外围之内， 因此外观美观。 由于该定位条固接该外围 ， 因此可一体成型， 连接强度高。 同吋， 由于踏板是通过连接件与支腿的腿管 连接， 其连接件的外侧面与腿管固定， 内侧与踏板端部套接， 因此， 不需要在 腿管上开通孔， 且空心踏板端部与连接件套接后， 增大了与腿管的接触面积， 强度有效增强。 另一方面， 由于折叠装置釆用 H型铰链收折更方便， 且使用吋稳 定性强。
附图说明
[22] 下面结合附图和实施例对本发明进一步说明。
[23] 图 1为本发明实施例 1立体示意图。
[24] 图 2为本发明实施例 1立体分解示意图。 [25] 图 3为本发明实施例 1仰视立体示意图。
[26] 图 4为本发明实施例 1托盘的立体示意图。
[27] 图 5为本发明实施例 1铰链的结构示意图。
[28] 图 6为本发明实施例 1铰链的立体示意图。
[29] 图 7为本发明实施 1踏板连接部位结构示意图。
[30] 图 8为图 7的局部放大图。
[31] 图 9为本发明实施例 1踏板的截面形状示意图。
[32] 图 10为本发明实施例 2踏板的截面形状示意图。
[33] 图 11为本发明实施例 3踏板的截面形状示意图。
[34] 图 12为本发明实施例 4立体示意图。
[35] 图 13为本发明实施例 4局部放大立体分解图。
[36] 图 14为本发明实施例 4连接件的立体示意图。
具体实施方式
[37] 实施例 1、 请査阅图 1、 2、 3、 4、 5、 6、 7、 8、 9， 一种人字梯， 它包括前支腿 100、 后支腿 200、 托盘 300、 铰链 400、 踏板 500、 连接装置 600。
[38] 两前支腿 100间通过连接装置 600安装有踏板 500; 两后支腿 200间隔固设有后横 杆或踏板 500; 托盘 300安装在前支腿 100和后支腿 200的顶部； 铰链 400为 H型， 安装在在前支腿 100和后支腿 200的中部。
[39] 托盘 300: 请査阅图 1、 图 2、 图 3以及图 4， 该托盘 300包括一本体 310以及一横 杆 320。 该本体 310周边缘向下延伸成外围 311。 该本体 310之下成型有多根间隔 并排的横向的加强筋条 312以及多根间隔并排的纵向的加强筋条 313， 该加强筋 条 312和加强筋条 313都固连该外围 311。 该每一横向加强筋条 312上都设有上凹 的凹槽 314， 该凹槽 314排成纵列并形成为适配该横杆 320的定位槽， 而且， 该定 位槽位置正对于该某一纵向加强筋条 313。 该横杆 320截面为圆形， 也可以是非 圆形如方形、 六边形等形状。
[40] 托盘 300的本体 310连接该前支腿 100， 该外围 311套接该前支腿 100顶端； 该横 杆 320水平穿过该前支腿 100的两前支杆。 上述的该横杆 320支撑在该本体 310的 定位槽， 而且， 该横杆 320的穿过该前支腿 100之外的穿出端插接该外围 311， 用 以使该托盘 300和前支腿 100之间构成固定连接结构。
[41] 该后支腿 200枢接在该本体 310之下， 并位于该外围 311之内， 用以使该托盘 300 和后支腿 200之间构成转动连接结构， 从而使该前支腿 100和后支腿 200之间构成 转动连接结构。
[42] 铰链 400: 请査阅图 5、 图 6， 用作折叠装置的铰链 400为 H型， 包括一横杆 410， 一对前纵杆 420和一对后纵杆 430; 后纵杆 430为 U型杆件， 前纵杆 420的后端插入 后纵杆 430内束接； 前纵杆 420的前端固定在两前支腿 100的外侧； 两后纵杆 430 的后端固定在两后支腿 200的外侧； 横杆 410固定在两前纵杆 410之间， 其前纵杆 420外侧成型有定位凸台 421， 在横杆 410中部还装有一手握部 411。 铰链 400用以 使人字梯稳定在展开状态。 人字梯收折吋， 握住手握部 411向下拉动， 使前纵杆 420的后端脱离后纵杆 430的约束， 二者相对转动， 至前纵杆 420外侧的凸台 421 抵靠后纵杆 430。 同吋， 带动后支腿 200相对托盘 300转动， 靠向前支腿 100。
[43] 踏板 500: 请査阅图 7、 图 9， 该空心踏板 500包括一主体 510， 该主体 510横截面 成三角框， 它包括一顶板以及两下板。 该主体 510的顶板底面中间设有轴向的加 强卡口 520， 该两下板夹角上也设有轴向的加强卡口 530， 该两加强卡口 520、 53 0之间连接一加强片 540， 该加强片 540将该空心踏板 500之内孔分成两部分。 该 踏板 500具体结构请参照本申请人在先专利 ZL500520126388.6。
[44] 连接装置 600: 请査阅图 7、 图 8， 该连接装置 600包括一连接件 610、 一纵向凹 槽 620、 一垫片 630以及一锁接件 640。 该纵向凹槽 620轴向凹设在前支腿 100之内
[45] 连接件 610它包括一体成型的一中间片 611、 一插接部 612以及一凸出部 613。 该 插接部 612背面固设在中间片 611正面， 该插接部 612结构与该空心踏板 500的内 孔结构匹配， 它包括两相互分离的独立部。 该凸出部 613正面固设在中间片 611 背面， 该凸出部 613为适配该纵向凹槽 612的条状凸块。 其中， 该中间片 611具有 伸出该插接部 612之外的正伸出面， 具有伸出该凸出部 613之外的背伸出面。 连接件 610的插接部 612插接空心踏板 500之内孔 （该两独立部分别插接进内孔 的两对应部分） ， 该连接件 610的凸出部 613不可转动地插接进纵向凹槽 620内， 而且， 该中间片 611的正伸出面靠接该空心踏板 500端口， 背伸出面靠接前支腿 1 00。 由于空心踏板 500内部分成两部分， 因此插接部和空心踏板之间绝不会相互 转动。 根据需要， 该凸出部 613与纵向凹槽 620过盈配合。
[47] 垫片 630靠接在前支腿 100之外侧。 该锁接件包括两自功螺钉， 该两自功螺钉上 下排列， 而且， 它的锁接端依次锁接穿过该垫片 630、 前支腿 100、 纵向凹槽 620 以及该连接件 610的凸出部 613， 并伸进该加强卡口。 其中， 该垫片和前支腿之 间的摩擦力能够承受部分剪切力， 能保护腿管。
[48] 实施例 2， 请査阅 10， 它与上一较佳实施例不同之处在于： 该空心踏板 500包括 一主体 510以及一加强板 520， 该主体 510为类矩形框， 它包括上、 下板， 该加强 板 540连接在该主体 510的上下板之间。
[49] 实施例 3， 请査阅 11， 它与上一较佳实施例不同之处在于： 该空心踏板 500包括 一主体 510， 该主体 510为类矩形框， 它包括上、 下板， 该上板底面中间设有轴 向的加强卡口 520， 该下板顶面中间设有轴向的加强卡口 530。
[50] 实施例 4， 请参阅图 12、 13、 14, 本实施例与实施例 1不同之处主要是踏板 500 与前支腿 100之间的连接装置不同。
[51] 连接装置 700: 包括连接件 760、 加强片 770和锁紧件螺钉 780。 连接件 760具有 一呈类 '十'字的基座 761、 两分别固设基座 761左右侧并向后凸设的凸块 762以及两 分别固设基座 761前后侧并向后凸设的中间件 763， 该两凸块 762、 两中间件 763 均伸出于基座 761之后。 该基座 761前开设有定位槽 764， 该定位槽 764截面外周 与踏板 500端部截面外周相匹配。
[52] 请参阅图 9以及图 12， 该踏板 500端部定位支撑于该连接件 760的定位槽 764内。
该基座 761后侧面通过加强片 770固定靠接前支腿 100的第一侧面， 该两凸块 762 分别紧靠接前支腿 100的两相邻于第一侧面的第二侧面 （两第二侧面分别为左右 侧面） ， 该中间件 763位于中间槽 64之内且其之间紧配合。 加强片 770位于中间 槽 64内并固定介于连接件 760和前支腿 100之间。 另配设有螺钉 780， 其螺接端固 接穿过前支腿 100和连接件 760并穿进踏板 500的卡口 520。
[53] 本发明可以是单面人字梯， 即两前支腿间安装有踏板， 两后支腿间安装支撑横 杆； 也可以是双面人字梯， 即两前支腿之间、 两后支腿之间均装有踏板。
工业实用性 [54] 本发明一种人字梯， 包括前支腿、 后支腿、 踏板、 折叠装置、 连接装置以及托 盘； 该托盘包括一本体以及一横杆， 该横杆穿过该前支腿， 该本体之下设有匹 配横杆的定位槽， 折叠装置为 H型铰链， 安装在在前支腿和后支腿的中部； 踏板 通过连接装置安装在支腿上。 其结构简单， 使用效果好， 构件强度高， 具有良 好的工业实用性。

Claims

权利要求书
[1] 一种人字梯， 包括前支腿、 后支腿、 踏板、 折叠装置、 连接装置以及托盘
； 该托盘连接该前支腿和后支腿， 该前支腿和该后支腿之间构成转动连接 结构； 该托盘包括一本体以及一横杆， 该横杆穿过该前支腿， 该本体之下 设有匹配横杆的定位槽， 其中， 该本体连接该前支腿， 该本体的定位槽支 撑在该横杆之上； 折叠装置为 H型铰链， 安装在在前支腿和后支腿的中部
； 踏板通过连接装置安装在支腿上。
[2] 根据权利要求 1所述的一种人字梯， 其特征是： 该本体之下成型有多根间隔 并排的横向的加强筋条， 该加强筋条之下形成有上凹的匹配横杆的凹槽， 该些凹槽排成纵列并形成为适配该横杆的定位槽。
[3] 根据权利要求 1所述的一种人字梯， 其特征是： 该本体之下成型有多根间隔 并排的横向的加强筋条以及一纵向的定位条， 该定位条交叉连接该些加强 筋条， 定位条之下设有匹配横杆的定位槽。
[4] 根据权利要求 2或 3所述的一种人字梯， 其特征是： 该本体外周边缘向下延 伸成外围， 其中， 本体连接在前支腿， 外围套接支腿顶端， 横杆穿过前支 腿并连接该外围。
[5] 根据权利要求 1所述的一种人字梯， 其特征是： 该 H型铰链包括一横杆， 一 对前纵杆和一对后纵杆； 后纵杆为 U型杆件， 前纵杆的后端插入后纵杆内 束接； 前纵杆的前端固定在两前支腿的外侧； 两后纵杆的后端固定在两后 支腿的外侧； 横杆固定在两前纵杆之间。
[6] 根据权利要求 1所述的一种人字梯， 其特征是： 该连接装置包括： 一连接件
， 连接件外侧面与踏板端部套接， 内侧面与前支腿连接， 并通过一锁接件 穿过前支腿再锁接在该连接件。
[7] 根据权利要求 6所述的一种人字梯， 其特征是： 连接件， 包括一中间片、 一 插接部以及一凸出部， 该插接部和凸出部分别固设在该中间片之前后， 其 中， 该插接部适配并插接进该空心踏板端口内周； 在前支腿内侧上开设一 纵向凹槽， 纵向凹槽不可转动地连接该连接件的凸出部。
[8] 根据权利要求 7所述的一种人字梯， 其特征是： 该连接件一体成型， 中间片 正面固设在该插接部背面， 该中间片具有伸出该插接部之外的正伸出面； 其中， 该插接部插接进该空心踏板端口内周， 该正伸出面靠接该空心踏板 端口。
[9] 根据权利要求 7所述的一种人字梯， 其特征是： 该中间片背面固设该凸出部
， 该中间片具有伸出该凸出部之外的背伸出面； 其中， 该凸出部插接进该 前支腿的纵向凹槽， 该背伸出面靠接前支腿， 该凸出部为适配该纵向凹槽 的条状凸块。
[10] 根据权利要求 6所述的一种人字梯， 其特征是： 连接件前侧面开设有定位槽
， 定位槽截面内周与梯蹬踏板端部截面外周相匹配， 踏板端部定位支撑于 该定位槽内， 连接件与腿管之间固接连接。
[11] 根据权利要求 10所述的一种人字梯， 其特征是： 该连接件具有一基座以及 两分别固设基座左右侧的凸块， 该定位槽开设于基座， 该两凸块伸出于基 座之后， 其中， 该基座后侧面固定靠接腿管的第一侧面， 该两凸块分别靠 接前支腿的两相邻于第一侧面的第二侧面。
[12] 根据权利要求 10所述的一种人字梯， 其特征是： 该凸块与前支腿的第二侧 面之间的靠接为紧靠接。
[13] 根据权利要求 10所述的一种人字梯， 其特征是： 该腿管的第一侧面内凹形 成中间槽， 该基座向后凸设有中间件， 该中间件位于中间槽之内， 且其之 间紧配合。
[14] 根据权利要求 7或 10所述的一种人字梯， 其特征是： 可以只是在前支腿件安 装踏板； 也可以在前支腿间、 后支腿件均安装有踏板。
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US20110024232A1 (en) 2011-02-03
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EP2267267A1 (en) 2010-12-29
US8381875B2 (en) 2013-02-26

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