JP2007285055A - Ascending/descending ladder for truck - Google Patents

Ascending/descending ladder for truck Download PDF

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JP2007285055A
JP2007285055A JP2006115588A JP2006115588A JP2007285055A JP 2007285055 A JP2007285055 A JP 2007285055A JP 2006115588 A JP2006115588 A JP 2006115588A JP 2006115588 A JP2006115588 A JP 2006115588A JP 2007285055 A JP2007285055 A JP 2007285055A
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hook
ladder
mounting bracket
mounting plate
lock
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JP4592635B2 (en
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Reiko Ichikawa
令子 市川
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Alinco Inc
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Alinco Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To enable a hook to be locked to a use position and a storage position by using a simple structure, and to facilitate the operation of switching from the use position to the storage position, and vice versa. <P>SOLUTION: This ascending/descending ladder for the truck comprises a ladder body 3 which is constituted by horizontally laying a plurality of rungs 2 between a pair of right and left side frames 1 and 1, and a latching implement 4 which is provided on the side of the upper end of each of both the side frames 1 and 1 of the ladder body 3 and latched to a ladder setting place of the truck bed section. The latching implement 4 comprises: a hook 8; a hook mounting plate 9 which is fixed to a base end of the hook 8; a mounting bracket 10 which is mounted on the side frame 1 of the ladder body 3; a locking pin 11 which makes the mounting plate 9 pivotally mounted on the mounting bracket 10, and which makes the hook 8 locked in a use position to be locked to the truck bed section, or a storage position to be housed along the side frame 1 of the ladder body 3; and a coiled spring 20. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、トラックの荷台部の所要個所に立て掛けて使用されるトラック用昇降梯子に関するものである。   The present invention relates to a lifting ladder for a truck that is used standing on a required portion of a truck bed.

従来のトラック用昇降梯子としては、例えば下記特許文献１に記載されたものがある。このトラック用昇降梯子は、両側一対の側枠に踏み杆を所要間隔おきに横架してなる梯子本体と、梯子本体の両側枠の夫々上部側に設けられ、トラック荷台部の立て掛け箇所に掛止される掛止具とからなるもので、掛止具は、梯子本体の側枠に一端部を枢着された回動自在な回動板と、この回動板の先端部に固着された略Ｌ字状のフックと、梯子本体が所定の傾斜角度の立て掛け姿勢にある時にフックを側枠から前方へ水平に突出した使用位置に保持する使用位置保持手段と、フックを側枠沿いに収納した収納位置に保持する収納位置保持手段とからなる。   As a conventional lifting ladder for trucks, for example, there is one described in Patent Document 1 below. This lifting ladder for trucks is provided on the upper side of the ladder main body, which is constructed by horizontally placing a foot rod on a pair of side frames at required intervals, and on both sides of the ladder main body. The latch is fixed to the end of the pivot plate and the pivot plate having one end pivotally attached to the side frame of the ladder body. A substantially L-shaped hook, a use position holding means for holding the hook in a use position protruding horizontally from the side frame forward when the ladder body is in a leaning posture with a predetermined inclination angle, and the hook is stored along the side frame Storage position holding means for holding the storage position.

回動板は、その一端部が枢軸で梯子本体の側枠に枢着されたもので、遊端部側の上辺部に突設された突片部に略Ｕ字状の切欠溝が形成され、この切欠溝は、フックが使用位置にある時、側枠に固着された基板に取り付けてある蝶ボルトに係合可能となる。しかして、この切欠溝を蝶ボルトに係合させた状態で蝶ボルトを締め付けることにより、フックは、使用位置に保持される。この切欠溝と蝶ボルトとが使用位置保持手段を構成する。また回動板には遊端部側の下辺部に略Ｕ字状の切欠溝が形成され、この切欠溝は、フックが収納位置にある時、同じ基板の他の箇所に取り付けてある蝶ボルトに係合可能となる。しかして、この切欠溝を蝶ボルトに係合させた状態で蝶ボルトを締め付けることによって、フックは収納位置に保持される。この切欠溝と蝶ボルトとが収納位置保持手段を構成する。
特開２００５−４８３８１号公報 One end of the rotating plate is pivotally attached to the side frame of the ladder main body by a pivot, and a substantially U-shaped notch groove is formed in the protruding piece protruding from the upper side of the free end. The notch groove can be engaged with a wing bolt attached to a substrate fixed to the side frame when the hook is in the use position. Thus, the hook is held in the use position by tightening the butterfly bolt with the notch groove engaged with the butterfly bolt. The notch groove and the butterfly bolt constitute use position holding means. In addition, the rotary plate has a substantially U-shaped notch groove on the lower side on the free end side, and this notch groove is a butterfly bolt attached to another part of the same substrate when the hook is in the storage position. Can be engaged. Thus, the hook is held in the storage position by tightening the butterfly bolt with the notch groove engaged with the butterfly bolt. The cutout groove and the butterfly bolt constitute a storage position holding means.
JP 2005-48381 A

上記特許文献１に記載のトラック用昇降梯子の掛止具は、フックを使用位置に保持する使用位置保持手段及びフックを収納位置に保持する収納位置保持手段の夫々の構造が複雑で部品点数が多く、使用位置から収納位置へ、また収納位置から使用位置への切り換え操作が面倒である、といった問題があった。   The latching device for the truck elevating ladder described in Patent Document 1 has a complicated structure and a number of parts of the use position holding means for holding the hook in the use position and the storage position holding means for holding the hook in the storage position. In many cases, the switching operation from the use position to the storage position and from the storage position to the use position is troublesome.

本発明は、簡単な構造でフックを使用位置及び収納位置にロックできるようにすると共に、使用位置から収納位置へ、また収納位置から使用位置への切り換え操作が簡単に行なえるトラック用昇降梯子を提供することを目的とする。   The present invention provides a truck elevating ladder that allows a hook to be locked to a use position and a storage position with a simple structure and that can be easily switched from a use position to a storage position and from a storage position to a use position. The purpose is to provide.

上記課題を解決するための手段を、後述する実施形態の参照符号を付して説明すると、請求項１に係る発明は、左右一対の側枠１，１に踏み杆２を複数段に横架してなる梯子本体３と、梯子本体３の両側枠の夫々上端部側に設けられ、トラック荷台部の立て掛け個所に係止される掛止具４とからなるトラック用昇降梯子において、
掛止具４は、略Ｌ字状のフック８と、このフック８の基端部に固着されたフック取付板９と、梯子本体３の側枠１に取り付けられる取付ブラケット１０と、フック取付板９を取付ブラケット１０に枢着すると共にフック８をトラック荷台部に係止される使用位置及び梯子本体３の側枠１沿いに収納される収納位置にロックするロックピン１１とからなり、ロックピン１１は、枢軸部１１ａとこれよりも短い係止軸部１１ｂと両軸部１１ａ，１１ｂをつなぐ連結軸部１１ｃとで略コ字状に形成されていて、枢軸部１１ａをフック取付板９の外側からフック取付板９と取付ブラケット１０の枢軸孔１２，１４に貫通し且つ係止軸部１１ｂをフック取付板９の係止軸挿通孔１３に係入すると共に、枢軸部１１ａと取付ブラケット１０との間に連結軸部１１ｃをフック取付板９の外面側に引き付けるように付勢するバネ２０を介装し、係止軸部１１ｂをフック取付板９の係止軸挿通孔１３から取付ブラケット１０のフック使用位置ロック孔１５に係入することによりフック８を使用位置にロックし、係止軸部１１ｂを係止軸挿通孔１３から取付ブラケット１０のフック収納位置ロック孔１６に係入することによりフック８を収納位置にロックするようにしたことを特徴とする。 Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is such that the treadle 2 is horizontally mounted in a plurality of stages on the pair of left and right side frames 1 and 1. In a truck lifting ladder comprising a ladder main body 3 and a latch 4 provided on the upper end side of each side frame of the ladder main body 3 and locked to a standing part of the truck bed,
The latch 4 includes a substantially L-shaped hook 8, a hook attachment plate 9 fixed to the base end of the hook 8, a attachment bracket 10 attached to the side frame 1 of the ladder body 3, and a hook attachment plate. 9 is pivotally attached to the mounting bracket 10, and the hook 8 is locked to the truck loading platform, and the lock pin 11 is locked to the storage position stored along the side frame 1 of the ladder body 3. 11 is formed in a substantially U-shape with a pivot shaft portion 11a, a locking shaft portion 11b shorter than the pivot shaft portion 11a, and a connecting shaft portion 11c connecting both shaft portions 11a and 11b. The hook mounting plate 9 and the pivot holes 12 and 14 of the mounting bracket 10 are penetrated from the outside, and the locking shaft portion 11b is engaged with the locking shaft insertion hole 13 of the hook mounting plate 9, and the pivot portion 11a and the mounting bracket 10 are inserted. Connecting shaft between A spring 20 that biases 11c to be pulled toward the outer surface side of the hook mounting plate 9 is interposed, and the locking shaft portion 11b is moved from the locking shaft insertion hole 13 of the hook mounting plate 9 to the hook use position lock hole of the mounting bracket 10. 15, the hook 8 is locked in the use position, and the hook 8 is stored in the hook storage position lock hole 16 of the mounting bracket 10 through the lock shaft insertion hole 13. It is characterized by being locked to.

請求項２は、請求項１に記載のトラック用昇降梯子において、取付ブラケット１０は、梯子本体３の両側枠１，１の夫々上端部側に側枠長手方向に沿って取付位置変更自在に取り付けられることを特徴とする。   Claim 2 is the lifting ladder for a truck according to claim 1, wherein the mounting bracket 10 is attached to the upper end sides of the both side frames 1 and 1 of the ladder body 3 so that the mounting position can be changed along the longitudinal direction of the side frame. It is characterized by being able to.

上記解決手段による発明の効果を、後述する実施形態の参照符号を付して説明すると、請求項１に係る発明のトラック用昇降梯子Ａによれば、掛止具４は、部品点数が少なく、構造が簡単でありながら、ロックピン１１の枢軸部１１ａを中心にフック８を主として回動するような簡単な操作で使用位置及び収納位置に確実にロックできると共に、使用位置から収納位置へ、また収納位置から使用位置への切り換え操作を簡単容易に行なうことができる。   The effect of the invention by the above solution will be described with reference numerals in the embodiments described later. According to the lifting ladder A for a truck according to the first aspect, the latch 4 has a small number of parts, Although it is simple in structure, it can be securely locked to the use position and the storage position by a simple operation such as mainly rotating the hook 8 around the pivot 11a of the lock pin 11, and from the use position to the storage position. Switching operation from the storage position to the use position can be performed easily and easily.

請求項２に係る発明によれば、取付ブラケット１０は、梯子本体３の両側枠１，１の夫々上端部側に側枠長手方向に沿って取付位置変更自在に取り付けられるから、トラック荷台部の高さに応じて掛止具４の設置高さを調整でき、梯子Ａを的確に使用できる。   According to the second aspect of the present invention, the mounting bracket 10 is attached to the upper end side of each of the side frames 1 and 1 of the ladder body 3 so that the mounting position can be changed along the longitudinal direction of the side frame. The installation height of the latch 4 can be adjusted according to the height, and the ladder A can be used accurately.

以下に本発明の実施形態について図面を参照しながら説明すると、先ず、図１の(a) は本発明に係るトラック用昇降梯子Ａの正面図、(b) は同トラック用昇降梯子Ａの側面図であり、図２は同トラック用昇降梯子Ａの使用状態における側面図である。このトラック用昇降梯子Ａは、左右一対の側枠１，１に踏み杆２を所要間隔おきに複数段に横架してなる梯子本体３と、この梯子本体３の両側枠１，１の夫々上端部側に設けられていて、トラックの荷台部の立て掛け個所に係止される掛止具４とから構成され、掛止具４は、梯子本体３の両側枠１，１の夫々上端部側に設置高さ変更自在に取り付けられている。   Embodiments of the present invention will be described below with reference to the drawings. First, (a) in FIG. 1 is a front view of a truck lifting ladder A according to the present invention, and (b) is a side view of the truck lifting ladder A according to the present invention. FIG. 2 is a side view of the truck elevating ladder A in use. In this truck lifting ladder A, a ladder main body 3 in which a foot rod 2 is horizontally mounted in a plurality of stages at a required interval on a pair of left and right side frames 1 and 1, and both side frames 1 and 1 of the ladder main body 3 are respectively provided. The latch 4 is provided on the upper end side, and is latched to the hanging portion of the truck bed, and the latch 4 is on the upper end side of each side frame 1, 1 of the ladder body 3. The installation height can be changed freely.

図１の(a) 及び(b) に示すように、梯子本体３には最上段側の踏み杆２に、作業者が作業時に履く靴の底部をその長さの半分以上にわたって支持し得るように踏み杆２の幅よりも幅の広い作業床兼用のステップ部材５が取り付けられている。   As shown in FIGS. 1 (a) and 1 (b), the ladder body 3 can be supported by the uppermost treadle 2 so that the bottom of the shoe worn by the worker during the work can be supported over half of the length. Further, a step member 5 serving as a work floor that is wider than the width of the treadle 2 is attached.

また、梯子本体３には片側の側枠１の上端部側に、手掛り棒６が、回転式取付金具７を介して、図１の(a) に仮想線あるいは図２の実線で示されるように鉛直姿勢に起立した使用位置と、この使用位置から下向きに反転して図１の実線で示すように側枠１に沿って収納される収納位置とに回転可能に設けられている。   Further, the ladder main body 3 is provided with a cue bar 6 on the upper end side of the side frame 1 on one side through a rotary mounting bracket 7 as shown by a virtual line or a solid line in FIG. And a use position that stands upright in a vertical position and a storage position that is reversed downward from the use position and stored along the side frame 1 as shown by the solid line in FIG.

梯子本体３の各側枠１は、図４〜図６及び図８の(b) に示すように外側板部１ａと前後板部１ｂ，１ｂとで断面コ字状に形成されるアルミ押出型材からなり、各踏み杆２は、図３に示すような中空角筒状のアルミ押出型材からなる。   Each side frame 1 of the ladder main body 3 is an aluminum extrusion mold formed in a U-shaped cross section with an outer plate portion 1a and front and rear plate portions 1b and 1b as shown in FIGS. 4 to 6 and FIG. 8 (b). Each treadle 2 is made of a hollow rectangular tube-shaped aluminum extruded mold as shown in FIG.

ステップ部材５も角筒状アルミ押出型材からなるもので、このステップ部材５は、図３に示すように、隔壁部５ａを隔てて、基端部側の角筒状中空部５ｂと、その先方側の角筒状中空部５ｃとによって形成させれ、その基端部側の角筒状中空部５ｂは、角筒状踏み杆２の断面形状に対応する断面形状を有して、その踏み杆２にぴったりと外嵌し得る形状に形成され、その基端部側の角筒状中空部５ｂが最上段側の踏み杆２に外嵌されて固定されている。   The step member 5 is also made of a rectangular tubular aluminum extrusion mold material. As shown in FIG. 3, the step member 5 is separated from the partition wall portion 5a by a square tubular hollow portion 5b on the base end side, and its distal end. The square tubular hollow portion 5b on the base end side has a cross-sectional shape corresponding to the cross-sectional shape of the square tubular saddle 2, and the pedal 2 is formed in a shape that can be fitted to the outer wall 2 exactly, and the square hollow portion 5b on the base end side is fitted and fixed to the treadle 2 on the uppermost side.

梯子本体３を組み立てるには、夫々断面コ字状のアルミ押出型材からなる左右一対の側枠１，１を夫々コ字状 開口部側を内向きにして所定間隔に対向させた状態で、両側枠１，１間に踏み杆２を複数段、例えば３段に配して、各踏み杆２の両端部を両側枠１，１に夫々内嵌合させ、詳細な図示は省略するが、各側枠１の前後板部１ｂ，１ｂから踏み杆２に対しボルト２２（図１の(a) 参照）をねじ込んで締め付け固定する。そして、最上段の踏み杆２を取り付ける際に、その最上段の踏み杆２に予めステップ部材５を上記のように取り付けておいて、このステップ部材５を取り付けた踏み杆２を両側枠１，１間の最上段位置にボルト２２で固定する。   In order to assemble the ladder body 3, a pair of left and right side frames 1, 1 each made of an aluminum extrusion mold material having a U-shaped cross section are respectively U-shaped. The pedal rod 2 is arranged in a plurality of stages, for example, three stages between the frames 1 and 1, and both ends of each pedal rod 2 are fitted into the both side frames 1 and 1, respectively, and detailed illustration is omitted. A bolt 22 (see FIG. 1 (a)) is screwed into the treadle 2 from the front and rear plate portions 1b, 1b of the side frame 1 and fastened and fixed. And when attaching the top step 2, the step member 5 is previously attached to the top step 2 as described above, and the step 2 attached with the step member 5 is attached to both side frames 1. The bolt 22 is fixed at the uppermost position between the two.

上記のようにステップ部材５は、梯子本体３の角筒状踏み杆２に外嵌可能な踏み杆嵌合用の角筒状中空部５ｂをステップ部材５の基端部側に形成したアルミ押出型材からなるもので、その角筒状中空部５ｂを最上段側の踏み杆２に外嵌して固定するようにしたから、ステップ部材５自体を安価に製作できると共に、このステップ部材５の取付けが簡単で、梯子Ａの製作が容易となる。   As described above, the step member 5 is an aluminum extrusion mold member in which the square tubular hollow portion 5b for fitting a foot rod that can be externally fitted to the square tubular foot rod 2 of the ladder body 3 is formed on the base end side of the step member 5. Since the rectangular hollow portion 5b is externally fitted and fixed to the uppermost treadle 2, the step member 5 itself can be manufactured at a low cost and the step member 5 can be attached. It is simple and the ladder A can be easily manufactured.

この実施形態では、梯子本体３に取り付けられる最上段の踏み杆２にその上からステップ部材５を取り付けるようにしているが、梯子本体３の最上段に踏み杆２を取り付けることなく、踏み杆２に代えて、梯子本体３の最上段の踏み杆取付位置に、作業床兼用ステップ部材５を直接取り付けるようにしてもよい。   In this embodiment, the step member 5 is attached to the uppermost step 2 attached to the ladder body 3 from above, but the step 2 is not attached to the uppermost step of the ladder body 3. Instead of this, the work floor combined step member 5 may be directly attached to the uppermost treadle attachment position of the ladder body 3.

図１の(a) に概略示すように、各踏み杆２の両端部下面側には三角形のコーナー補強金具２３が取り付けられていて、このコーナー補強金具２３も踏み杆２と共にボルト２２で側枠１に取付け固定される。尚、最上段の踏み杆２については、これにステップ部材５を外嵌した後、両端部にコーナー補強金具２３が固着されるから、ステップ部材５は両端部のコーナー補強金具２３，２３間に保持されて固定され、ガタつくようなことがない。   As schematically shown in FIG. 1 (a), triangular corner reinforcing brackets 23 are attached to the lower surfaces of both end portions of each foot rod 2. 1 and fixed. In addition, since the corner reinforcing bracket 23 is fixed to both ends of the uppermost tread bar 2 after the step member 5 is externally fitted thereto, the step member 5 is interposed between the corner reinforcing brackets 23, 23 on both ends. It is held and fixed, and there is no rattling.

掛止具４は、梯子本体３の両側枠１，１の夫々上端部側に設置高さ変更自在に取り付けらるが、その具体的な構造を図４の(a) ，(b) 〜図６の(a) ，(b) に示している。即ち、この掛止具４は、略Ｌ字状のフック８と、このフック８の基端部に固着されたフック取付板９と、梯子本体３の側枠１に取り付けられる取付ブラケット１０と、前記フック取付板９を取付ブラケット１０に枢着すると共にフック８をトラックの荷台部に係止される使用位置及び梯子本体の側枠沿いに収納される収納位置にロックするロックピン１１と、このロックピン１１と取付ブラケット１０との間に介装されるコイルバネ２０とから構成される。   The latch 4 is attached to the upper end of each of the side frames 1 and 1 of the ladder body 3 so that the installation height can be changed. The specific structure is shown in FIGS. 4 (a) and 4 (b) to FIG. 6 (a) and (b). That is, the latch 4 includes a substantially L-shaped hook 8, a hook mounting plate 9 fixed to the base end portion of the hook 8, a mounting bracket 10 that is mounted to the side frame 1 of the ladder body 3, and A lock pin 11 for pivotally attaching the hook mounting plate 9 to a mounting bracket 10 and locking the hook 8 to a use position where the hook 8 is locked to the truck bed and a storage position stored along the side frame of the ladder body, The coil spring 20 is interposed between the lock pin 11 and the mounting bracket 10.

掛止具４のフック８は、図４の(a) に示すように、水平部８ａと、これの先端部から直角に折曲延設された垂直部８ｂとによってＬ字状に形成されたもので、水平部８ａの基端部にフック取付板９が固着されている。フック取付板９には、図４の(a) 〜図６の(a) に示すように、水平部８ａの基端部から遠い部位に枢軸孔１２が設けられ、水平部８ａの基端部に近い部位に掛止軸挿通孔１３が貫設されている。ロックピン１１は、図７の(a) 〜(d) に示されるように、枢軸部１１ａと、この枢軸部１１ａよりも短い係止軸部１１ｂと、両軸部１１ａ，１１ｂをつなぐ連結軸部１１ｃとによって略コ字状に形成されており、また枢軸部１１ａには連結軸部１１ｃ側の端部に波形スプリングピン１１ｄが取り付けてある。   As shown in FIG. 4A, the hook 8 of the latching tool 4 is formed in an L shape by a horizontal portion 8a and a vertical portion 8b that is bent and extended perpendicularly from the front end portion thereof. The hook mounting plate 9 is fixed to the base end portion of the horizontal portion 8a. As shown in FIGS. 4A to 6A, the hook mounting plate 9 is provided with a pivot hole 12 at a position far from the base end of the horizontal portion 8a, and the base end of the horizontal portion 8a. A latching shaft insertion hole 13 is provided in a portion close to. As shown in FIGS. 7A to 7D, the lock pin 11 includes a pivot portion 11a, a locking shaft portion 11b shorter than the pivot portion 11a, and a connecting shaft that connects the shaft portions 11a and 11b. The portion 11c is formed in a substantially U shape, and a wave spring pin 11d is attached to the end of the connecting shaft portion 11c on the pivot portion 11a.

取付ブラケット１０は、図８の(a) 〜(c) に示すように、掛止具４のフック取付板９を支持する主板１０ａの左右両端部に内向きフランジ部１０ｂ，１０ｂを突設すると共に、主板１０ａの上端部に外向き鍔片１０ｃを突設してなるもので、主板１０ａには上下方向中央部の左右両側に枢軸孔１４，１４が設けられ、各枢軸孔１４の上方部位にフック使用位置ロック孔１５，１５が設けられ、主板１０ａの下端側中央部にフック収納位置ロック孔１６が設けられていて、図８の(b) に示すように、梯子本体３の側枠１に対し、左右のフランジ部１０ｂ，１０ｂが側枠１の両端板部１ｂ，１ｂに外側から係合する状態で側枠１の長手方向沿いにスライド可能に嵌合され、しかしてボルト１７をフランジ部１０ｂのボルト挿通孔１９から側枠１の板部１ｂのボルト挿通孔２５に通し、内側からナット１８で締め付けることにより、側枠１の所要位置に取り付け固定されるようになっている。   As shown in FIGS. 8A to 8C, the mounting bracket 10 has inward flange portions 10 b and 10 b protruding from both left and right ends of the main plate 10 a that supports the hook mounting plate 9 of the hook 4. In addition, the main plate 10a is formed by projecting outward flanges 10c at the upper end of the main plate 10a. The main plate 10a is provided with pivot holes 14, 14 on the left and right sides of the central portion in the vertical direction. Are provided with hook use position lock holes 15 and 15, and a hook storage position lock hole 16 is provided at the lower end side central portion of the main plate 10 a, and as shown in FIG. 1, the left and right flange portions 10b, 10b are slidably fitted along the longitudinal direction of the side frame 1 with the both end plate portions 1b, 1b of the side frame 1 engaged from the outside. The plate portion of the side frame 1 from the bolt insertion hole 19 of the flange portion 10b. Through b bolt insertion holes 25 of, by tightening the inner nut 18, and is fixedly attached to a predetermined position of the side frame 1.

尚、取付ブラケット１０の主板１０ａに枢軸孔１４及びフック使用位置ロック孔１５が両側２つずつ設けてあるのは、同じ取付ブラケット１０を左右の側枠１，１に夫々に取り付けるようにしていることから、この取付ブラケット１０を、例えば左側の側枠１に取り付ける場合は一方側の枢軸孔１４とフック使用位置ロック孔１５を使用し、右側の側枠１に取り付ける場合には他方側の枢軸孔１４とフック使用位置ロック孔１５とを使用するようにしたものである。フック８の基端部の一側面部に取り付けられるフック取付板９は、左右の側枠１，１に同じものを使用できないため、左右の側枠１，１に対し左右対称状に取り付けたものを使用する。   In addition, the pivot plate 14 and the hook use position lock holes 15 are provided on each side of the main plate 10a of the mounting bracket 10 so that the same mounting bracket 10 is attached to the left and right side frames 1 and 1, respectively. Therefore, for example, when the mounting bracket 10 is attached to the left side frame 1, the pivot hole 14 and the hook use position lock hole 15 on one side are used, and when the mounting bracket 10 is attached to the right side frame 1, the other pivot is provided. The hole 14 and the hook use position lock hole 15 are used. The hook attachment plate 9 attached to one side surface of the base end portion of the hook 8 cannot be used for the left and right side frames 1, 1, and is attached symmetrically to the left and right side frames 1, 1. Is used.

しかして、フック８の基端部に固着したフック取付板９をロックピン１１を介して取付ブラケット１０に取り付けるには、ロックピン１１の枢軸部１１ａを、フック取付板９の外側からフック取付板９の枢軸孔１２と取付ブラケット１０の枢軸孔１４とに貫通し且つ係止軸部１１ｂをフック取付板９の掛止軸挿通孔１３（図５の(b) 参照）に係入すると共に、枢軸部１１ａと取付ブラケット１０との間には、連結軸部１１ｃをフック取付板９の外面側に引き付けるように付勢するためのコイルバネ２０を介装する。このコイルバネ２０は、フック取付板９の枢軸孔１２と取付ブラケット１０の枢軸孔１４に挿通させた枢軸部１１ａの先端部側に嵌め込んで、その枢軸部１１ａの先端ねじ部にナット２１を螺着すればよい。   Thus, in order to attach the hook attachment plate 9 fixed to the base end portion of the hook 8 to the attachment bracket 10 via the lock pin 11, the pivot portion 11 a of the lock pin 11 is connected to the hook attachment plate from the outside of the hook attachment plate 9. 9 is inserted into the pivot hole 12 of the mounting bracket 10 and the locking shaft portion 11b is engaged with the hook shaft insertion hole 13 of the hook mounting plate 9 (see FIG. 5B). Between the pivot portion 11a and the mounting bracket 10, a coil spring 20 for biasing the connecting shaft portion 11c so as to be attracted to the outer surface side of the hook mounting plate 9 is interposed. The coil spring 20 is fitted to the distal end side of the pivot portion 11a inserted through the pivot hole 12 of the hook mounting plate 9 and the pivot hole 14 of the mounting bracket 10, and a nut 21 is screwed into the distal end screw portion of the pivot portion 11a. Just wear it.

こうしてフック８の基端部に固着したフック取付板９をロックピン１１を介して取付ブラケット１０に取り付けることによって、フック８はロックピン１１の枢軸部１１ａを中心に揺動自在であり、ロックピン１１はその連結軸部１１ｃがコイルバネ２０によってフック取付板９の外面側に引き付けられるように付勢されているから、ロックピン１１の連結軸部１１ｃをコイルバネ２０の付勢力に抗して手前側へ引っ張った状態で、フック８をロックピン１１の枢軸部１１ａを中心に回動して、その係止軸部１１ｂをフック取付板９の係止軸挿通孔１３から取付ブラケット１０のフック使用位置ロック孔１５に係入することにより、フック８は使用位置にロックされ、図４の(a) 及び(b) に示す状態となる。   By attaching the hook mounting plate 9 thus fixed to the base end portion of the hook 8 to the mounting bracket 10 via the lock pin 11, the hook 8 can swing around the pivot portion 11a of the lock pin 11, and the lock pin 11 is biased so that the connecting shaft portion 11c is attracted to the outer surface side of the hook mounting plate 9 by the coil spring 20, so that the connecting shaft portion 11c of the lock pin 11 is on the near side against the biasing force of the coil spring 20. The hook 8 is pivoted about the pivot 11a of the lock pin 11 in the state of being pulled to the position, and the hook shaft 11b is moved from the hook shaft insertion hole 13 of the hook mounting plate 9 to the hook use position of the mounting bracket 10. By engaging with the lock hole 15, the hook 8 is locked at the use position, and the state shown in FIGS. 4 (a) and 4 (b) is obtained.

しかして、フック８が使用位置にロックされた図４に示すようなロック状態を解除する時は、図５の(b) に示すように、フック８を掴んで手前側へ引っ張り、フック取付板９のフック取付端部側が取付ブラケット１０から離間してロックピン１１が傾くようにするようにすることにより、ロックピン１１の係止軸部１１ｂを、フック取付板９の係止軸挿通孔１３に係入したまま取付ブラケット１０のフック使用位置ロック孔１５から離脱させ、この状態でフック８を掴んでフック取付板９をロックピン１１の枢軸部１１ａを中心に回動させてロックピン１１の係止軸部１１ｂを取付ブラケット１０のフック収納位置ロック孔１６に係入することにより、フック８は収納位置にロックされ、図６の(a) 及び(b) に示すような状態となる。   When the locked state as shown in FIG. 4 in which the hook 8 is locked in the use position is released, as shown in FIG. 5 (b), the hook 8 is grasped and pulled to the near side, and the hook mounting plate 9, the hook mounting end portion side is separated from the mounting bracket 10 so that the lock pin 11 is inclined, so that the locking shaft portion 11 b of the lock pin 11 is connected to the locking shaft insertion hole 13 of the hook mounting plate 9. In this state, the hook 8 is grasped and the hook mounting plate 9 is rotated around the pivot portion 11 a of the lock pin 11 to engage the lock pin 11. By engaging the locking shaft portion 11b into the hook storage position lock hole 16 of the mounting bracket 10, the hook 8 is locked in the storage position, and the state shown in FIGS. 6 (a) and 6 (b) is obtained.

各側枠１の前後板部１ｂ，１ｂにはその上端部側に、図１の(a) に示すように、ボルト挿通孔２５が一定ピッチで複数箇所（例えば８個所）に設けられているから、ボルト１７を取外し、取付ブラケット１０を側枠１に沿ってスライドさせ、所望のボルト挿通孔２５にボルト１７を挿通してナット１８で締め付けることにより、取付ブラケット１０の取り付け位置を変更することができ、それによりトラック荷台部の高さに応じて掛止具４の設置高さを調整できて、的確な梯子Ａの使用ができる。   As shown in FIG. 1 (a), the front and rear plate portions 1b, 1b of each side frame 1 are provided with bolt insertion holes 25 at a plurality of locations (for example, 8 locations) at a constant pitch. The mounting position of the mounting bracket 10 is changed by removing the bolt 17, sliding the mounting bracket 10 along the side frame 1, inserting the bolt 17 into the desired bolt insertion hole 25, and tightening with the nut 18. As a result, the installation height of the latch 4 can be adjusted according to the height of the truck bed, so that the ladder A can be used accurately.

上記のように構成されるトラック用昇降梯子Ａの使用に際しては、図２に示すように、使用位置にロックした掛止具４のフック８をトラック荷台部の煽り外板Ｒに掛止させて、梯子本体３を所定角度θ°に傾斜した状態で立て掛ける。この図２には、トラック荷台部の煽り外板Ｒの高さに応じて、掛止具４の設置高さを例えばＨ1 〜Ｈ6 の６段階に変更可能であることを図示している。この掛止具４の設置高さを変更する時は、前述のように、ボルト１７を取り外して取付ブラケット１０を側枠１に沿って適宜にスライドさせ、所望のボルト挿通孔２５にボルト１７を挿通してナット１８で締め付けることにより、取付ブラケット１０を側枠１に固定すればよい。 As shown in FIG. 2, when the truck lifting ladder A configured as described above is used, the hook 8 of the hook 4 locked in the use position is hooked on the turning outer plate R of the truck bed. The ladder body 3 is leaned in a state inclined at a predetermined angle θ °. FIG. 2 illustrates that the installation height of the hook 4 can be changed to, for example, six levels H 1 to H 6 according to the height of the turn outer plate R of the truck bed. . When changing the installation height of the latch 4, as described above, the bolt 17 is removed and the mounting bracket 10 is appropriately slid along the side frame 1, and the bolt 17 is inserted into the desired bolt insertion hole 25. The mounting bracket 10 may be fixed to the side frame 1 by being inserted and tightened with the nut 18.

こうしてトラック荷台部の煽り外板Ｒに立て掛けた昇降梯子Ａの使用において、梯子本体３の最上段側の踏み杆２には、作業者が履く靴の底部をその長さの半分以上にわたって支持するように踏み杆２の幅より広い幅を有する作業床兼用のステップ部材５が取り付けてあるから、作業者が梯子本体３の最上段側の踏み杆２に足を掛けて積み下ろし作業を行なう時は、靴の底部をその最上段側の踏み杆２に十分に支持させることができて、足場が安定状態となり、従って作業がし易く、安全に作業を行なうことができるし、また作業者がトラック荷台部から下りるために最上段側踏み杆２に足を踏み入れる時は、その靴の底部を最上段側踏み杆２に十分に支持させることができるから、足を踏み外すことがなく、安全に下りることができる。また、昇降時には手掛り棒６を掴むことによって安全に昇り降りすることができる。   In this way, in the use of the lifting ladder A leaning on the outer skin R of the truck bed, the uppermost step 2 of the ladder body 3 supports the bottom of the shoe worn by the operator over half of its length. Since the step member 5 also serving as a work floor having a width wider than that of the foot rod 2 is attached as described above, when an operator puts his / her feet on the foot rod 2 on the uppermost side of the ladder body 3 and performs the loading / unloading work. The bottom of the shoe can be sufficiently supported by the uppermost treadle 2 so that the scaffolding becomes stable, so that the work can be performed easily and safely, and the operator can track the track. When stepping on the top step 2 to descend from the loading platform, the bottom of the shoe can be sufficiently supported by the top step 2 so that it can be safely lowered without stepping off the foot. be able to. Further, when ascending and descending, it is possible to safely ascend and descend by grasping the clue bar 6.

昇降梯子Ａの使用を終えたならば、掛止具４のフック８をトラック荷台部の煽り外板Ｒから外し、そしてこのフック８は使用位置にロックされているので、図５の(a) ，(b) に示すようにロックを解除し、図６の(a) ，(b) に示すような収納位置に収納してロックすればよい。   When the use of the lifting ladder A is finished, the hook 8 of the latch 4 is removed from the turn outer plate R of the truck bed, and this hook 8 is locked in the use position. , (B), the lock is released, and it is stored in the storage position as shown in (a), (b) of FIG.

以上の実施形態の説明から分かるように、このトラック用昇降梯子の掛止具４は、この掛止具４を構成する部材の部材点数が少なく、その構造が簡単でありながら、ロックピン１１の枢軸部１１ａを中心にフック８を傾転したり回動するような簡単な操作で使用位置及び収納位置に確実にロックできると共に、使用位置から収納位置へ、また収納位置から使用位置への切り換え操作を簡単且つ容易に行なうことができるものである。   As can be understood from the above description of the embodiment, the latching device 4 of the lifting ladder for trucks has a small number of members constituting the latching device 4 and has a simple structure. The hook 8 can be tilted or pivoted about the pivot 11a and can be securely locked to the use position and the storage position, and can be switched from the use position to the storage position and from the storage position to the use position. The operation can be performed easily and easily.

(a) は本発明に係るトラック用昇降梯子の収納状態における正面図、(b) は同トラック用昇降梯子の収納状態における側面図である。(a) is a front view in the stowed state of the truck lifting ladder according to the present invention, (b) is a side view in the stowed state of the truck lifting ladder. 同トラック用昇降梯子の使用状態における側面図である。It is a side view in the use condition of the raising / lowering ladder for trucks. 梯子本体の最上段の踏み杆に外嵌して取り付けられるステップ部材の拡大断面図である。It is an expanded sectional view of the step member externally fitted and attached to the top step of the ladder body. (a) は掛止具の拡大側面図で、フックが使用位置にロックされた状態を示し、(b) は(a) のＸ−Ｘ線断面図である。(a) is an enlarged side view of the hook, showing a state in which the hook is locked in the use position, and (b) is a sectional view taken along line XX of (a). (a) フックのロックが解除された状態の掛止具の拡大側面図、(b) は図４の(b) と同様な断面図である。(a) An enlarged side view of the hook in a state where the hook is unlocked, and (b) is a sectional view similar to (b) of FIG. (a) フックが収納位置にロックされた状態の掛止具の拡大側面図、(b) は図４の(b) と同様な断面図である。(a) An enlarged side view of the hook with the hook locked in the storage position, and (b) is a cross-sectional view similar to (b) of FIG. (a) はロックピンの正面図、(b) は平面図、(c) は左側面図、(d) は右側面図である。(a) is a front view of the lock pin, (b) is a plan view, (c) is a left side view, and (d) is a right side view. (a) は取付ブラケットの正面図、(b) は平面図、(c) は右側面である。(a) is a front view of the mounting bracket, (b) is a plan view, and (c) is a right side view.

符号の説明Explanation of symbols

Ａ トラック用昇降梯子
１ 側枠
２ 踏み杆
３ 梯子本体
４ 掛止具
８ フック
９ フック取付板
１０ 取付ブラケット
１１ ロックピン
１１ａ ロックピンの枢軸部
１１ｂ ロックピンの係止軸部
１１ｃ ロックピンの連結軸部
１２ フック取付板の枢軸孔
１３ フック取付板の係止軸挿通孔
１４ 取付ブラケットの枢軸孔
１５ 取付ブラケットのフック使用位置ロック孔
１６ 取付ブラケットのフック収納位置ロック孔
A Lifting ladder for truck 1 Side frame 2 Foot rod 3 Ladder body 4 Latch 8 Hook 9 Hook mounting plate 10 Mounting bracket 11 Lock pin 11a Lock pin pivot 11b Lock pin locking shaft 11c Lock pin connecting shaft Part 12 Pivot hole 13 of hook mounting plate Locking shaft insertion hole 14 of hook mounting plate Pivot hole 15 of mounting bracket Hook use position lock hole 16 of mounting bracket Hook storage position lock hole of mounting bracket

Claims (2)

左右一対の側枠に踏み杆を複数段に横架してなる梯子本体と、梯子本体の両側枠の夫々上端部側に設けられ、トラック荷台部の立て掛け個所に係止される掛止具とからなるトラック用昇降梯子において、
掛止具は、略Ｌ字状のフックと、このフックの基端部に固着されたフック取付板と、梯子本体の側枠に取り付けられる取付ブラケットと、フック取付板を取付ブラケットに枢着すると共にフックをトラック荷台部に係止される使用位置及び梯子本体の側枠沿いに収納される収納位置にロックするロックピンとからなり、ロックピンは、枢軸部とこれよりも短い係止軸部と両軸部をつなぐ連結軸部とで略コ字状に形成されていて、枢軸部をフック取付板の外側からフック取付板と取付ブラケットの枢軸孔に貫通し且つ係止軸部をフック取付板の係止軸挿通孔に係入すると共に、枢軸部と取付ブラケットとの間に連結軸部をフック取付板の外面側に引き付けるように付勢するバネを介装し、係止軸部をフック取付板の係止軸挿通孔から取付ブラケットのフック使用位置ロック孔に係入することによりフックを使用位置にロックし、係止軸部を係止軸挿通孔から取付ブラケットのフック収納位置ロック孔に係入することによりフックを収納位置にロックするようにしたトラック用昇降梯子。 A ladder body in which a foot rod is horizontally mounted in a pair of left and right side frames, and a latch that is provided on the upper end side of each side frame of the ladder body and is latched to a standing part of the truck bed. In the lifting ladder for trucks consisting of
The latch includes a substantially L-shaped hook, a hook mounting plate fixed to the base end of the hook, a mounting bracket attached to the side frame of the ladder body, and a hook mounting plate pivotally attached to the mounting bracket. And a lock pin that locks the hook in a use position where the hook is locked to the truck bed and a storage position where the hook is stored along the side frame of the ladder body. The lock pin includes a pivot portion and a shorter lock shaft portion. It is formed in a substantially U shape with the connecting shaft part that connects both shaft parts, and the pivot part penetrates the hook mounting plate and the pivot hole of the mounting bracket from the outside of the hook mounting plate, and the locking shaft part is the hook mounting plate. And a spring that urges the connecting shaft between the pivot and the mounting bracket so as to attract the outer surface of the hook mounting plate, and hooks the locking shaft. Mounting bracket from the locking shaft insertion hole of the mounting plate The hook is locked into the use position by engaging with the hook use position lock hole of the hook, and the hook is stored in the lock position by engaging the lock shaft portion from the lock shaft insertion hole into the hook storage position lock hole of the mounting bracket. Lifting ladder for trucks that is locked to 取付ブラケットは、梯子本体の両側枠の夫々上端部側に側枠長手方向に沿って取付位置変更自在に取り付けられることを特徴とする請求項１に記載のトラック用昇降梯子。
2. The lifting ladder for trucks according to claim 1, wherein the mounting brackets are attached to the upper end portions of both side frames of the ladder body so that the mounting position can be changed along the longitudinal direction of the side frames.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010133160A (en) * 2008-12-05 2010-06-17 Alinco Inc Baseboard for projected corner
JP2011001704A (en) * 2009-05-19 2011-01-06 Alinco Inc Baseboard for scaffolding
JP2015006040A (en) * 2013-06-19 2015-01-08 中国電力株式会社 Hook device for operation rod
WO2019171479A1 (en) * 2018-03-06 2019-09-12 住友重機械建機クレーン株式会社 Crane

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015035U (en) * 1983-07-11 1985-02-01 日本トレ−ルモ−ビル株式会社 Van-type vehicle equipped with a tarp device
JPS6411300U (en) * 1987-07-10 1989-01-20
JP2005048381A (en) * 2003-07-30 2005-02-24 Kajima Mechatro Engineering Co Ltd Ladder for truck

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015035U (en) * 1983-07-11 1985-02-01 日本トレ−ルモ−ビル株式会社 Van-type vehicle equipped with a tarp device
JPS6411300U (en) * 1987-07-10 1989-01-20
JP2005048381A (en) * 2003-07-30 2005-02-24 Kajima Mechatro Engineering Co Ltd Ladder for truck

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010133160A (en) * 2008-12-05 2010-06-17 Alinco Inc Baseboard for projected corner
JP2011001704A (en) * 2009-05-19 2011-01-06 Alinco Inc Baseboard for scaffolding
JP2015006040A (en) * 2013-06-19 2015-01-08 中国電力株式会社 Hook device for operation rod
WO2019171479A1 (en) * 2018-03-06 2019-09-12 住友重機械建機クレーン株式会社 Crane

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