JP2022064459A - Fixation structure of child seat and bicycle with child set - Google Patents

Fixation structure of child seat and bicycle with child set Download PDF

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JP2022064459A
JP2022064459A JP2020173099A JP2020173099A JP2022064459A JP 2022064459 A JP2022064459 A JP 2022064459A JP 2020173099 A JP2020173099 A JP 2020173099A JP 2020173099 A JP2020173099 A JP 2020173099A JP 2022064459 A JP2022064459 A JP 2022064459A
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seat
backrest
vertical direction
seat plate
child seat
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JP7282729B2 (en
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聡 小熊
Satoshi Koguma
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Bridgestone Cycle Co Ltd
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Bridgestone Cycle Co Ltd
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Abstract

To enable a seating part and a backrest part to be firmly fixed without increasing man-hours.SOLUTION: A fixation structure 1 of a child seat fixes a child seat 10, which is equipped with a seating part 11 and a backrest part 12 extending upward from a rear end part of the seating part, to a luggage carrier 20 of a bicycle. The seating part comprises a seat plate part 13 whose front and back sides point in a vertical direction. The backrest part is bent so that front and back sides of a lower end part 14 point in the vertical direction, where the lower end part of the backrest part is inserted between a lower surface of the seat plate part and the luggage carrier. The structure further comprises a fixed shaft 15 that penetrates in the vertical direction through at least either of the seat plate part and the luggage carrier as well as the lower end part of the backrest part to fix the seat plate part, the lower end part of the backrest part and the luggage carrier.SELECTED DRAWING: Figure 2

Description

本発明は、チャイルドシートの固定構造、およびチャイルドシート付き自転車に関するものである。 The present invention relates to a fixed structure for a child seat and a bicycle with a child seat.

従来から、例えば下記特許文献１に示されるように、座部と、座部の後端部から上方に向けて延びる背もたれ部と、を備え、座部および背もたれ部がボルトを介して連結されたチャイルドシートが知られている。 Conventionally, for example, as shown in Patent Document 1 below, a seat portion and a backrest portion extending upward from the rear end portion of the seat portion are provided, and the seat portion and the backrest portion are connected via bolts. Child seats are known.

中国特許出願公開第１０６９８５９３７号明細書Chinese Patent Application Publication No. 106985937

この種のチャイルドシートにおいては、座部および背もたれ部を強く固定することが求められている。 In this type of child seat, it is required to firmly fix the seat portion and the backrest portion.

この発明は、このような事情を考慮してなされたもので、工数を増大させずに、座部および背もたれ部を強く固定することができるチャイルドシートの固定構造、およびチャイルドシート付き自転車を提供することを目的とする。 The present invention has been made in consideration of such circumstances, and provides a child seat fixing structure capable of strongly fixing a seat and a backrest without increasing man-hours, and a bicycle with a child seat. The purpose.

上記課題を解決して、このような目的を達成するために、本発明のチャイルドシートの固定構造は、座部と、前記座部の後端部から上方に向けて延びる背もたれ部と、を備え、自転車の荷台に固定されるチャイルドシートの固定構造であって、前記座部は、表裏面が上下方向を向く座板部を備え、前記背もたれ部は、下端部の表裏面が上下方向を向くように屈曲し、前記背もたれ部の下端部は、前記座板部の下面と前記荷台との間に差し込まれ、前記座板部、および前記荷台のうちの少なくとも一方、並びに前記背もたれ部の下端部を上下方向に貫いて、前記座板部、前記背もたれ部の下端部、および前記荷台を固定する固定軸を備えている。
本発明のチャイルドシート付き自転車は、チャイルドシートが、本発明のチャイルドシートの固定構造によって自転車の荷台に固定されている。 In order to solve the above problems and achieve such an object, the fixing structure of the child seat of the present invention includes a seat portion and a backrest portion extending upward from the rear end portion of the seat portion. It is a fixed structure of a child seat fixed to a bicycle carrier, and the seat portion is provided with a seat plate portion whose front and back surfaces face in the vertical direction, and the backrest portion has a lower end portion whose front and back surfaces face in the vertical direction. The lower end portion of the backrest portion is bent and inserted between the lower surface of the seat plate portion and the loading platform, and the seat plate portion, at least one of the loading platform, and the lower end portion of the backrest portion are moved up and down. It is provided with a seat plate portion, a lower end portion of the backrest portion, and a fixed shaft for fixing the loading platform so as to penetrate in the direction.
In the bicycle with a child seat of the present invention, the child seat is fixed to the loading platform of the bicycle by the fixing structure of the child seat of the present invention.

この発明によれば、背もたれ部の下端部が、座板部の下面と荷台との間に差し込まれているので、仮に固定軸が緩んでも、チャイルドシートに座った子供の体重によって、背もたれ部の下端部が、座板部の下面および荷台により上下方向に挟まれて固定されることとなり、座板部および背もたれ部の下端部の、上下方向に直交する水平方向の相対的な位置ずれを抑えることができる。
背もたれ部の下端部が、座板部の下面と荷台との間に差し込まれていることから、背もたれ部に後方に向けた大きな負荷が加えられたときに、背もたれ部の下端部の上面が、座板部の下面に圧接することとなり、背もたれ部に加えられた負荷を座板部に分散させて受け止めさせることができる。
しかも、固定軸が、座板部、および荷台のうちの少なくとも一方、並びに背もたれ部の下端部を上下方向に貫いて、座板部、背もたれ部の下端部、および荷台を固定しているので、座部と背もたれ部との固定と、チャイルドシートの荷台への固定と、を同一の固定軸で行うことが可能になり、部品点数および組付け工数の増大を防ぐことができる。
以上より、工数を増大させずに、座部および背もたれ部を強く固定することができる。 According to the present invention, the lower end of the backrest is inserted between the lower surface of the seat plate and the loading platform, so that even if the fixed shaft is loosened, the lower end of the backrest depends on the weight of the child sitting on the child seat. The portion is sandwiched and fixed in the vertical direction by the lower surface of the seat plate portion and the loading platform, and the relative positional deviation of the seat plate portion and the lower end portion of the backrest portion in the horizontal direction orthogonal to the vertical direction is suppressed. Can be done.
Since the lower end of the backrest is inserted between the lower surface of the seat plate and the loading platform, the upper surface of the lower end of the backrest is exposed to a large load toward the rear when a large load is applied to the backrest. It comes into pressure contact with the lower surface of the seat plate portion, and the load applied to the backrest portion can be dispersed and received by the seat plate portion.
Moreover, since the fixed shaft penetrates at least one of the seat plate portion and the loading platform and the lower end portion of the backrest portion in the vertical direction to fix the seat plate portion, the lower end portion of the backrest portion, and the loading platform. It is possible to fix the seat and the backrest to the loading platform of the child seat with the same fixed shaft, and it is possible to prevent an increase in the number of parts and the assembly man-hours.
From the above, the seat portion and the backrest portion can be strongly fixed without increasing the man-hours.

前記座板部の下面、および前記背もたれ部の下端部の上面のうちのいずれか一方に、いずれか他方に形成された窪み部に嵌合された突部が形成されてもよい。 A protrusion fitted to a recess formed in the other may be formed on either the lower surface of the seat plate portion or the upper surface of the lower end portion of the backrest portion.

この場合、座板部の下面、および背もたれ部の下端部の上面のうちのいずれか一方に、いずれか他方に形成された窪み部に嵌合された突部が形成されているので、座板部および背もたれ部の下端部の水平方向の相対的な位置ずれを確実に抑えることができる。 In this case, since a protrusion fitted to the recess formed in the other is formed on either the lower surface of the seat plate portion or the upper surface of the lower end portion of the backrest portion, the seat plate portion is formed. It is possible to reliably suppress the horizontal relative misalignment of the lower end portion of the portion and the backrest portion.

前記固定軸は、上下方向から見て、前記窪み部および前記突部と同じ位置に設けられてもよい。 The fixed shaft may be provided at the same position as the recess and the protrusion when viewed from the vertical direction.

この場合、固定軸が、上下方向から見て、窪み部および突部と同じ位置に設けられているので、座部および背もたれ部を確実に強く固定することができる。 In this case, since the fixing shaft is provided at the same position as the recessed portion and the protruding portion when viewed from the vertical direction, the seat portion and the backrest portion can be reliably and strongly fixed.

前記窪み部および前記突部には、上下方向で互いに係合する係合部が各別に形成されてもよい。 Engaging portions that engage with each other in the vertical direction may be separately formed in the recessed portion and the protruding portion.

この場合、窪み部および突部に、上下方向で互いに係合する係合部が各別に形成されているので、突部が窪み部から外れるのを抑制することが可能になり、座部および背もたれ部をより一層確実に強く固定することができる。 In this case, since the recess and the protrusion are separately formed with engaging portions that engage with each other in the vertical direction, it is possible to prevent the protrusion from coming off the recess, and the seat and the backrest can be prevented from coming off. The part can be fixed more reliably and strongly.

前記座部は、前記座板部の後端部から上方に向けて延びるとともに、後方に向けて突の曲面状に形成された腰受部を備え、前記腰受部には、前記背もたれ部に形成された被係止部が当接することで、前記腰受部に対する前記背もたれ部の上方への移動を規制する規制部が形成されてもよい。 The seat portion extends upward from the rear end portion of the seat plate portion and is provided with a waist receiving portion formed in a curved shape of a protrusion toward the rear, and the waist receiving portion has a backrest portion. By contacting the formed locked portions, a restricting portion that restricts the upward movement of the backrest portion with respect to the waist receiving portion may be formed.

この場合、腰受部に、背もたれ部に形成された被係止部が当接することで、腰受部に対する背もたれ部の上方への移動を規制する規制部が形成されているので、座部および背もたれ部をより一層確実に強く固定することができる。 In this case, since the locked portion formed on the backrest portion abuts on the waist receiving portion, a restricting portion for restricting the upward movement of the backrest portion with respect to the waist receiving portion is formed, so that the seat portion and the seat portion and the seat portion are formed. The backrest can be more reliably and firmly fixed.

この発明によれば、工数を増大させずに、座部および背もたれ部を強く固定することができる。 According to the present invention, the seat portion and the backrest portion can be strongly fixed without increasing the man-hours.

本発明に係る第１実施形態として示したチャイルドシートの固定構造、およびチャイルドシート付き自転車の概略図である。It is a schematic diagram of the fixed structure of a child seat shown as the 1st Embodiment which concerns on this invention, and the bicycle with a child seat. 図１のチャイルドシートの固定構造の要部を示す前後方向に沿う縦断面図である。It is a vertical sectional view along the front-rear direction which shows the main part of the fixed structure of the child seat of FIG. 図２のＩＩＩ－ＩＩＩ線矢視断面図である。FIG. 2 is a cross-sectional view taken along the line III-III in FIG. 本発明に係る第２実施形態として示したチャイルドシートの固定構造の要部を示す前後方向に沿う縦断面図である。It is a vertical sectional view along the front-rear direction which shows the main part of the fixed structure of the child seat shown as the 2nd Embodiment which concerns on this invention.

以下、本発明の第１実施形態に係るチャイルドシート１０の固定構造１、およびチャイルドシート付き自転車３０ａを、図１から図３を参照しながら説明する。
チャイルドシート１０は、座部１１と、座部１１の後端部から上方に向けて延びる背もたれ部１２と、を備え、自転車の荷台２０に固定されて、チャイルドシート付き自転車３０ａを構成している。 Hereinafter, the fixed structure 1 of the child seat 10 and the bicycle 30a with the child seat according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
The child seat 10 includes a seat portion 11 and a backrest portion 12 extending upward from the rear end portion of the seat portion 11 and is fixed to a bicycle carrier 20 to form a bicycle 30a with a child seat.

座部１１の前部には、左右方向に延び、チャイルドシート１０に座った幼児によって把持されるハンドルバー２３が設けられている。ハンドルバー２３は、座部１１の前部における左右方向の全長にわたって設けられている。
座部１１は、座板部１３、腰受部２１、足載せ部２２、および股割部２８を備えている。座板部１３、腰受部２１、足載せ部２２、および股割部２８は一体に形成されている。
なお、腰受部２１、足載せ部２２、股割部２８、およびハンドルバー２３を設けなくてもよい。 A handlebar 23 extending in the left-right direction and being gripped by an infant sitting on the child seat 10 is provided on the front portion of the seat portion 11. The handlebar 23 is provided over the entire length in the left-right direction in the front portion of the seat portion 11.
The seat portion 11 includes a seat plate portion 13, a waist receiving portion 21, a foot rest portion 22, and a crotch split portion 28. The seat plate portion 13, the waist receiving portion 21, the foot rest portion 22, and the crotch split portion 28 are integrally formed.
It is not necessary to provide the waist receiving portion 21, the foot rest portion 22, the crotch split portion 28, and the handlebar 23.

座板部１３は、表裏面が上下方向を向く平板状に形成されている。
腰受部２１は、座板部１３の後端部から上方に向けて延びるとともに、後方に向けて突の曲面状に形成されている。図示の例では、腰受部２１は、上下方向に延び、かつ前方が開放された筒状に形成され、座板部１３の外周縁から上方に向けて延びている。腰受部２１は、座板部１３の外周縁のうちの前端部を除く全周にわたって設けられている。図２に示されるように、腰受部２１の上端部に、腰受部２１の外周面側に向けて突出するように屈曲した規制部２１ａが形成されている。規制部２１ａは、腰受部２１の上端部における全周にわたって連続して形成されている。 The seat plate portion 13 is formed in a flat plate shape with the front and back surfaces facing in the vertical direction.
The waist receiving portion 21 extends upward from the rear end portion of the seat plate portion 13 and is formed in a curved surface shape with a protrusion toward the rear. In the illustrated example, the waist receiving portion 21 extends in the vertical direction and is formed in a tubular shape with an open front portion, and extends upward from the outer peripheral edge of the seat plate portion 13. The waist receiving portion 21 is provided over the entire circumference of the outer peripheral edge of the seat plate portion 13 except for the front end portion. As shown in FIG. 2, a restricting portion 21a bent so as to project toward the outer peripheral surface side of the waist receiving portion 21 is formed at the upper end portion of the waist receiving portion 21. The restricting portion 21a is continuously formed over the entire circumference of the upper end portion of the waist receiving portion 21.

図１に示されるように、足載せ部２２は、左右一対設けられ、座板部１３および腰受部２１それぞれの前端部から下方に向けて延びている。
股割部２８は、座板部１３の前端部における左右方向の中央部から前方に向けて突出し、左右一対の足載せ部２２における上端部同士を連結している。股割部２８は、後述する荷台２０の枠体２０ａ上に載置されている。股割部２８は、締結部材２９により荷台２０に固定されている。締結部材２９は、股割部２８を上下方向に貫き、後述する荷台２０の架橋板２０ｃに螺着されている。 As shown in FIG. 1, a pair of left and right footrest portions 22 are provided, and extend downward from the front end portions of the seat plate portion 13 and the waist receiving portion 21.
The crotch split portion 28 projects forward from the central portion in the left-right direction at the front end portion of the seat plate portion 13, and connects the upper end portions of the pair of left and right footrest portions 22. The crotch split portion 28 is placed on the frame body 20a of the loading platform 20, which will be described later. The crotch split portion 28 is fixed to the loading platform 20 by the fastening member 29. The fastening member 29 penetrates the crotch split portion 28 in the vertical direction and is screwed to the cross-linking plate 20c of the loading platform 20 described later.

座板部１３の下面における前端縁に、後方を向く突き当て面１３ａが設けられている。突き当て面１３ａは、座板部１３の下面における左右方向の全長にわたって連続して延びている。図示の例では、突き当て面１３ａは、腰受部２１のうち、座板部１３の下面における前端縁に隣接し、かつ上下方向に延びる周端部にも連続して設けられており、突き当て面１３ａは、前後方向から見て、上方に向けて開口したＵ字状を呈する。
なお、突き当て面１３ａは、腰受部２１に設けず、座板部１３にのみ設けてもよく、座板部１３に設けなくてもよい。 An abutting surface 13a facing rearward is provided on the front end edge of the lower surface of the seat plate portion 13. The abutting surface 13a continuously extends over the entire length in the left-right direction on the lower surface of the seat plate portion 13. In the illustrated example, the abutting surface 13a is provided on the peripheral end portion of the waist receiving portion 21 adjacent to the front end edge on the lower surface of the seat plate portion 13 and extending in the vertical direction, and is continuously provided at the peripheral end portion. The contact surface 13a has a U-shape that opens upward when viewed from the front-rear direction.
The abutting surface 13a may not be provided on the waist receiving portion 21, but may be provided only on the seat plate portion 13, or may not be provided on the seat plate portion 13.

背もたれ部１２は、下端部１４の表裏面が上下方向を向くように屈曲している。背もたれ部１２の下端部１４は、平板状に形成されている。
背もたれ部１２の下端部１４は、座板部１３の下面と荷台２０との間に差し込まれている。下端部１４は、後述する荷台２０の枠体２０ａ上に載置されている。背もたれ部１２のうち、少なくとも下端部１４の前端縁は、座板部１３の突き当て面１３ａに前後方向で当接、若しくは近接している。 The backrest portion 12 is bent so that the front and back surfaces of the lower end portion 14 face in the vertical direction. The lower end portion 14 of the backrest portion 12 is formed in a flat plate shape.
The lower end portion 14 of the backrest portion 12 is inserted between the lower surface of the seat plate portion 13 and the loading platform 20. The lower end portion 14 is placed on the frame body 20a of the loading platform 20, which will be described later. Of the backrest portion 12, at least the front end edge of the lower end portion 14 is in contact with or close to the abutting surface 13a of the seat plate portion 13 in the front-rear direction.

背もたれ部１２は、下端部１４を底部に有し、かつ前方が開放された上下方向に延びる筒状に形成されている。背もたれ部１２は、下端部１４の他、下部２４、上部２５、および接続部２６を備えている。 The backrest portion 12 has a lower end portion 14 at the bottom portion and is formed in a cylindrical shape extending in the vertical direction with the front open. The backrest portion 12 includes a lower end portion 14, a lower portion 24, an upper portion 25, and a connecting portion 26 in addition to the lower end portion 14.

下部２４は、下端部１４の後端部から上方に向けて延びるとともに、後方に向けて突の曲面状に形成されている。図示の例では、下部２４は、上下方向に延び、かつ前方が開放された筒状に形成され、下端部１４の外周縁から上方に向けて延びている。下部２４は、下端部１４の外周縁のうちの前端部を除く全周にわたって設けられている。下部２４は、腰受部２１の外周面を、規制部２１ａを除く全域にわたって覆っている。下部２４の外周面は、カバー２７に覆われている。
上部２５は、上下方向に延び、かつ前方が開放された筒状に形成され、腰受部２１から上方に突出している。
接続部２６は、下部２４の上端部と上部２５の下端部とを全周にわたって接続している。接続部２６は、上方を向く段部（被係止部）１２ａを有している。段部１２ａは、腰受部２１の規制部２１ａの下面に、当接、若しくは近接している。段部１２ａが、腰受部２１の規制部２１ａの下面に当接することで、腰受部２１に対する背もたれ部１２の上方への移動が規制される。 The lower portion 24 extends upward from the rear end portion of the lower end portion 14 and is formed in a curved surface shape with a protrusion toward the rear. In the illustrated example, the lower portion 24 extends in the vertical direction and is formed in a tubular shape with an open front portion, and extends upward from the outer peripheral edge of the lower end portion 14. The lower portion 24 is provided over the entire circumference of the outer peripheral edge of the lower end portion 14 except for the front end portion. The lower portion 24 covers the outer peripheral surface of the waist receiving portion 21 over the entire area except the restricting portion 21a. The outer peripheral surface of the lower portion 24 is covered with a cover 27.
The upper portion 25 is formed in a tubular shape extending in the vertical direction and having an open front portion, and protrudes upward from the waist receiving portion 21.
The connecting portion 26 connects the upper end portion of the lower portion 24 and the lower end portion of the upper portion 25 over the entire circumference. The connecting portion 26 has a stepped portion (locked portion) 12a facing upward. The step portion 12a is in contact with or close to the lower surface of the restricting portion 21a of the waist receiving portion 21. When the step portion 12a abuts on the lower surface of the restricting portion 21a of the waist receiving portion 21, the upward movement of the backrest portion 12 with respect to the waist receiving portion 21 is restricted.

荷台２０は、枠体２０ａ、棒体２０ｂ、および架橋板２０ｃを備えている。 The loading platform 20 includes a frame body 20a, a rod body 20b, and a cross-linking plate 20c.

枠体２０ａは、上下方向から見て、前後方向に長い長方形状を呈する。
棒体２０ｂは、図３に示されるように、枠体２０ａの内側に位置して前後方向に延びる支持部２０ｄと、支持部２０ｄにおける前後方向の両端部から下方に向けて延び、自転車フレームに連結される連結部２０ｅと、を備えている。棒体２０ｂの支持部２０ｄは、枠体２０ａと同じ上下方向の位置に設けられている。棒体２０ｂは、左右方向に間隔をあけて複数設けられている。
架橋板２０ｃは、枠体２０ａにおける左右方向の全長にわたって設けられている。架橋板２０ｃの上面に、枠体２０ａおよび棒体２０ｂの支持部２０ｄが接合されている。架橋板２０ｃは、前後方向に間隔をあけて複数設けられている。 The frame body 20a exhibits a long rectangular shape in the front-rear direction when viewed from the vertical direction.
As shown in FIG. 3, the rod body 20b extends downward from both ends of the support portion 20d in the front-rear direction, which is located inside the frame body 20a and extends in the front-rear direction, to form a bicycle frame. It is provided with a connecting portion 20e to be connected. The support portion 20d of the rod body 20b is provided at the same vertical position as the frame body 20a. A plurality of rods 20b are provided at intervals in the left-right direction.
The cross-linking plate 20c is provided over the entire length of the frame body 20a in the left-right direction. The frame body 20a and the support portion 20d of the rod body 20b are joined to the upper surface of the cross-linking plate 20c. A plurality of cross-linking plates 20c are provided at intervals in the front-rear direction.

座板部１３、および荷台２０のうちの少なくとも一方、並びに背もたれ部１２の下端部１４を上下方向に貫いて、座板部１３、背もたれ部１２の下端部１４、および荷台２０を固定する固定軸１５を備えている。 A fixed shaft that vertically penetrates at least one of the seat plate portion 13 and the loading platform 20 and the lower end portion 14 of the backrest portion 12 to fix the seat plate portion 13, the lower end portion 14 of the backrest portion 12, and the loading platform 20. It is equipped with 15.

図示の例では、固定軸１５は、左右方向に間隔をあけて複数設けられている。固定軸１５は、左右方向の中央部から同じ間隔をあけて１つずつ、合計２つ設けられている。固定軸１５はボルトとされ、座板部１３を上下方向に貫き、荷台２０の架橋板２０ｃに形成された雌ねじ部に螺着されている。固定軸１５は、座板部１３、背もたれ部１２の下端部１４、および荷台２０を、上下方向に締め付けて固定している。固定軸１５は、架橋板２０ｃも上下方向に貫いている。 In the illustrated example, a plurality of fixed shafts 15 are provided at intervals in the left-right direction. Two fixed shafts 15 are provided, one at the same distance from the central portion in the left-right direction. The fixed shaft 15 is a bolt, penetrates the seat plate portion 13 in the vertical direction, and is screwed to the female screw portion formed on the crosslinked plate 20c of the loading platform 20. The fixed shaft 15 fixes the seat plate portion 13, the lower end portion 14 of the backrest portion 12, and the loading platform 20 by tightening them in the vertical direction. The fixed shaft 15 also penetrates the crosslinked plate 20c in the vertical direction.

なお、固定軸１５は、架橋板２０ｃを上下方向に貫かなくてもよく、枠体２０ａ、または棒体２０ｂの支持部２０ｄ等に螺着されてもよい。また、固定軸１５は、枠体２０ａ、棒体２０ｂの支持部２０ｄ、または架橋板２０ｃを上下方向に貫き、座板部１３を上下方向に貫かず、座板部１３の下面に形成された雌ねじ部に螺着されてもよい。また、固定軸１５は、ナットに締結されてもよい。また、固定軸１５として、ボルトに代えて例えば、リベット等を採用してもよい。 The fixed shaft 15 does not have to penetrate the crosslinked plate 20c in the vertical direction, and may be screwed to the frame body 20a, the support portion 20d of the rod body 20b, or the like. Further, the fixed shaft 15 is formed on the lower surface of the seat plate portion 13 so as to penetrate the frame body 20a, the support portion 20d of the rod body 20b, or the cross-linking plate 20c in the vertical direction and not the seat plate portion 13 in the vertical direction. It may be screwed to the female thread portion. Further, the fixed shaft 15 may be fastened to the nut. Further, as the fixed shaft 15, for example, a rivet or the like may be adopted instead of the bolt.

座板部１３の下面、および背もたれ部１２の下端部１４の上面のうちのいずれか一方に、いずれか他方に形成された窪み部１６に嵌合された突部１７が形成されている。
なお、座板部１３、および背もたれ部１２の下端部１４に、窪み部１６および突部１７を形成しなくてもよい。 A protrusion 17 fitted to a recess 16 formed in the other is formed on either the lower surface of the seat plate portion 13 or the upper surface of the lower end portion 14 of the backrest portion 12.
It is not necessary to form the recessed portion 16 and the protruding portion 17 at the lower end portion 14 of the seat plate portion 13 and the backrest portion 12.

図示の例では、窪み部１６および突部１７は、左右方向に間隔をあけて複数形成されている。窪み部１６および突部１７はそれぞれ、左右方向の中央部から同じ間隔をあけて１つずつ、合計２つ設けられている。窪み部１６は、背もたれ部１２の下端部１４の上面に形成され、突部１７は、座板部１３の下面に形成されている。
窪み部１６は、背もたれ部１２の下端部１４のうちの上面が下方に窪み、かつ下面が下方に突出するように有底筒状に形成されている。突部１７は、座板部１３のうちの上面が下方に窪み、かつ下面が下方に突出するように有底筒状に形成されている。窪み部１６および突部１７それぞれの周壁のうち、前端部は上方に向かうに従い前方に向けて延び、他の部分は上下方向に真直ぐ延びている。窪み部１６および突部１７それぞれの底壁が、上下方向で互いに当接している。 In the illustrated example, a plurality of recesses 16 and protrusions 17 are formed at intervals in the left-right direction. A total of two recesses 16 and 17 are provided, one at the same distance from the central portion in the left-right direction. The recess 16 is formed on the upper surface of the lower end 14 of the backrest 12, and the protrusion 17 is formed on the lower surface of the seat plate 13.
The recessed portion 16 is formed in a bottomed cylindrical shape so that the upper surface of the lower end portion 14 of the backrest portion 12 is recessed downward and the lower surface protrudes downward. The protrusion 17 is formed in a bottomed cylindrical shape so that the upper surface of the seat plate portion 13 is recessed downward and the lower surface protrudes downward. Of the peripheral walls of each of the recess 16 and the protrusion 17, the front end portion extends forward as it goes upward, and the other portion extends straight in the vertical direction. The bottom walls of the recess 16 and the protrusion 17 are in contact with each other in the vertical direction.

固定軸１５は、上下方向から見て、窪み部１６および突部１７と同じ位置に設けられている。なお、固定軸１５を、上下方向から見て、窪み部１６および突部１７から離れた位置に設けてもよい。
固定軸１５は、窪み部１６および突部１７それぞれの底壁を上下方向に貫いている。固定軸１５のボルト頭部は、有底筒状の突部１７の内側に収容されている。背もたれ部１２の下端部１４の下面における固定軸１５の挿通孔の開口周縁部に、下方に向けて突出した挿通筒１４ａが形成されている。挿通筒１４ａの下端開口縁は、架橋板２０ｃの上面に当接、若しくは近接している。 The fixed shaft 15 is provided at the same position as the recess 16 and the protrusion 17 when viewed from the vertical direction. The fixed shaft 15 may be provided at a position away from the recess 16 and the protrusion 17 when viewed from the vertical direction.
The fixed shaft 15 penetrates the bottom walls of the recess 16 and the protrusion 17 in the vertical direction. The bolt head of the fixed shaft 15 is housed inside a bottomed cylindrical protrusion 17. An insertion tube 14a projecting downward is formed at the peripheral edge of the opening of the insertion hole of the fixed shaft 15 on the lower surface of the lower end portion 14 of the backrest portion 12. The lower end opening edge of the insertion tube 14a is in contact with or close to the upper surface of the cross-linking plate 20c.

以上説明したように、本実施形態によるチャイルドシート１０の固定構造１、およびチャイルドシート付き自転車３０ａによれば、背もたれ部１２の下端部１４が、座板部１３の下面と荷台２０との間に差し込まれているので、仮に固定軸１５が緩んでも、チャイルドシート１０に座った子供の体重によって、背もたれ部１２の下端部１４が、座板部１３の下面および荷台２０により上下方向に挟まれて固定されることとなり、座板部１３および背もたれ部１２の下端部１４の、上下方向に直交する水平方向の相対的な位置ずれを抑えることができる。 As described above, according to the fixed structure 1 of the child seat 10 and the bicycle 30a with the child seat according to the present embodiment, the lower end portion 14 of the backrest portion 12 is inserted between the lower surface of the seat plate portion 13 and the loading platform 20. Therefore, even if the fixed shaft 15 is loosened, the lower end portion 14 of the backrest portion 12 is sandwiched and fixed in the vertical direction by the lower surface of the seat plate portion 13 and the loading platform 20 due to the weight of the child sitting on the child seat 10. Therefore, it is possible to suppress the relative positional deviation of the seat plate portion 13 and the lower end portion 14 of the backrest portion 12 in the horizontal direction orthogonal to the vertical direction.

背もたれ部１２の下端部１４が、座板部１３の下面と荷台２０との間に差し込まれていることから、背もたれ部１２に後方に向けた大きな負荷が加えられたときに、背もたれ部１２の下端部１４の上面が、座板部１３の下面に圧接することとなり、背もたれ部１２に加えられた負荷を座板部１３に分散させて受け止めさせることができる。 Since the lower end portion 14 of the backrest portion 12 is inserted between the lower surface of the seat plate portion 13 and the loading platform 20, when a large load toward the rear is applied to the backrest portion 12, the backrest portion 12 The upper surface of the lower end portion 14 comes into pressure contact with the lower surface of the seat plate portion 13, and the load applied to the backrest portion 12 can be dispersed and received by the seat plate portion 13.

しかも、固定軸１５が、座板部１３、および荷台２０のうちの少なくとも一方、並びに背もたれ部１２の下端部１４を上下方向に貫いて、座板部１３、背もたれ部１２の下端部１４、および荷台２０を固定しているので、座部１１と背もたれ部１２との固定と、チャイルドシート１０の荷台２０への固定と、を同一の固定軸１５で行うことが可能になり、部品点数および組付け工数の増大を防ぐことができる。
以上より、工数を増大させずに、座部１１および背もたれ部１２を強く固定することができる。 Moreover, the fixed shaft 15 penetrates at least one of the seat plate portion 13 and the loading platform 20 in the vertical direction, and the lower end portion 14 of the seat plate portion 13, the backrest portion 12, and the lower end portion 14 of the backrest portion 12. Since the loading platform 20 is fixed, it is possible to fix the seat portion 11 and the backrest portion 12 and the child seat 10 to the loading platform 20 with the same fixed shaft 15, and the number of parts and assembly can be performed. It is possible to prevent an increase in man-hours.
From the above, the seat portion 11 and the backrest portion 12 can be strongly fixed without increasing the man-hours.

座板部１３の下面、および背もたれ部１２の下端部１４の上面のうちのいずれか一方に、いずれか他方に形成された窪み部１６に嵌合された突部１７が形成されているので、座板部１３および背もたれ部１２の下端部１４の水平方向の相対的な位置ずれを確実に抑えることができる。 Since the protrusion 17 fitted to the recess 16 formed in the other is formed on either the lower surface of the seat plate portion 13 or the upper surface of the lower end portion 14 of the backrest portion 12. It is possible to reliably suppress the relative positional displacement of the seat plate portion 13 and the lower end portion 14 of the backrest portion 12 in the horizontal direction.

固定軸１５が、上下方向から見て、窪み部１６および突部１７と同じ位置に設けられているので、座部１１および背もたれ部１２を確実に強く固定することができる。 Since the fixed shaft 15 is provided at the same position as the recess 16 and the protrusion 17 when viewed from the vertical direction, the seat 11 and the backrest 12 can be reliably and strongly fixed.

腰受部２１に、背もたれ部１２に形成された段部１２ａが当接することで、腰受部２１に対する背もたれ部１２の上方への移動を規制する規制部２１ａが形成されているので、座部１１および背もたれ部１２をより一層確実に強く固定することができる。 Since the step portion 12a formed on the backrest portion 12 abuts on the waist receiving portion 21, the restricting portion 21a for restricting the upward movement of the backrest portion 12 with respect to the waist receiving portion 21 is formed. 11 and the backrest portion 12 can be more reliably and firmly fixed.

次に、本発明の第２実施形態に係るチャイルドシート１０の固定構造２、およびチャイルドシート付き自転車３０ｂを、図４を参照しながら説明する。
なお、この第２実施形態においては、第１実施形態における構成要素と同一の部分については同一の符号を付し、その説明を省略し、異なる点についてのみ説明する。 Next, the fixed structure 2 of the child seat 10 and the bicycle 30b with the child seat according to the second embodiment of the present invention will be described with reference to FIG.
In the second embodiment, the same parts as the components in the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and only the different points will be described.

本実施形態では、窪み部１６および突部１７に、上下方向で互いに係合する係合部３１、３２が各別に形成されている。係合部３１、３２は、窪み部１６および突部１７それぞれの周壁の前端部における下端部が、前方に向けて突となるように屈曲して形成されている。 In the present embodiment, the recessed portion 16 and the protruding portion 17 are separately formed with engaging portions 31 and 32 that engage with each other in the vertical direction. The engaging portions 31 and 32 are formed by bending the lower ends of the peripheral walls of the recessed portion 16 and the protruding portion 17 so as to be a protrusion toward the front.

以上説明したように、本実施形態によるチャイルドシート１０の固定構造２、およびチャイルドシート付き自転車３０ｂによれば、前記第１実施形態と同様の作用効果を奏するのに加え、窪み部１６および突部１７に、上下方向で互いに係合する係合部３１、３２が各別に形成されているので、突部１７が窪み部１６から外れるのを抑制することが可能になり、座部１１および背もたれ部１２をより一層確実に強く固定することができる。 As described above, according to the fixed structure 2 of the child seat 10 and the bicycle 30b with the child seat according to the present embodiment, in addition to exhibiting the same effects as those of the first embodiment, the recessed portion 16 and the protrusion 17 are formed. Since the engaging portions 31 and 32 that engage with each other in the vertical direction are separately formed, it is possible to prevent the protruding portion 17 from coming off from the recessed portion 16, and the seat portion 11 and the backrest portion 12 can be prevented from coming off. It can be fixed more reliably and strongly.

なお、本発明の技術範囲は、前述した実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、本発明の趣旨を逸脱しない範囲で、上記した実施の形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、上記した実施の形態および変形例を適宜組み合わせてもよい。 The technical scope of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the present invention.
For example, it is appropriately possible to replace the components in the above-described embodiment with well-known components without departing from the spirit of the present invention, and the above-described embodiments and modifications may be appropriately combined. ..

１、２ 固定構造
１０ チャイルドシート
１１ 座部
１２ 背もたれ部
１２ａ 段部（被係止部）
１３ 座板部
１４ 下端部
１５ 固定軸
１６ 窪み部
１７ 突部
２０ 荷台
２１ 腰受部
２１ａ 規制部
３０ａ、３０ｂ チャイルドシート付き自転車
３１、３２ 係合部 1, 2 Fixed structure 10 Child seat 11 Seat 12 Backrest 12a Stepped part (locked part)
13 Seat plate part 14 Lower end part 15 Fixed shaft 16 Depression part 17 Protrusion part 20 Loading platform 21 Waist receiving part 21a Restriction part 30a, 30b Bicycle with child seat 31, 32 Engaging part

Claims (6)

座部と、前記座部の後端部から上方に向けて延びる背もたれ部と、を備え、自転車の荷台に固定されるチャイルドシートの固定構造であって、
前記座部は、表裏面が上下方向を向く座板部を備え、
前記背もたれ部は、下端部の表裏面が上下方向を向くように屈曲し、
前記背もたれ部の下端部は、前記座板部の下面と前記荷台との間に差し込まれ、
前記座板部、および前記荷台のうちの少なくとも一方、並びに前記背もたれ部の下端部を上下方向に貫いて、前記座板部、前記背もたれ部の下端部、および前記荷台を固定する固定軸を備えている、チャイルドシートの固定構造。 It is a fixed structure of a child seat provided with a seat portion and a backrest portion extending upward from the rear end portion of the seat portion, and is fixed to a bicycle carrier.
The seat portion includes a seat plate portion whose front and back surfaces face in the vertical direction.
The backrest portion is bent so that the front and back surfaces of the lower end portion face in the vertical direction.
The lower end of the backrest is inserted between the lower surface of the seat plate and the loading platform.
A fixed shaft for fixing the seat plate portion, the lower end portion of the backrest portion, and the loading platform by penetrating the seat plate portion, at least one of the loading platforms, and the lower end portion of the backrest portion in the vertical direction is provided. The fixed structure of the child seat. 前記座板部の下面、および前記背もたれ部の下端部の上面のうちのいずれか一方に、いずれか他方に形成された窪み部に嵌合された突部が形成されている、請求項１に記載のチャイルドシートの固定構造。 According to claim 1, a protrusion fitted to a recess formed in the other is formed on either the lower surface of the seat plate portion or the upper surface of the lower end portion of the backrest portion. The fixed structure of the child seat described. 前記固定軸は、上下方向から見て、前記窪み部および前記突部と同じ位置に設けられている、請求項２に記載のチャイルドシートの固定構造。 The child seat fixing structure according to claim 2, wherein the fixed shaft is provided at the same position as the recess and the protrusion when viewed from the vertical direction. 前記窪み部および前記突部には、上下方向で互いに係合する係合部が各別に形成されている、請求項２または３に記載のチャイルドシートの固定構造。 The child seat fixing structure according to claim 2 or 3, wherein an engaging portion that engages with each other in the vertical direction is separately formed in the recessed portion and the protruding portion. 前記座部は、前記座板部の後端部から上方に向けて延びるとともに、後方に向けて突の曲面状に形成された腰受部を備え、
前記腰受部には、前記背もたれ部に形成された被係止部が当接することで、前記腰受部に対する前記背もたれ部の上方への移動を規制する規制部が形成されている、請求項１から４のいずれか１項に記載のチャイルドシートの固定構造。 The seat portion extends upward from the rear end portion of the seat plate portion and is provided with a waist receiving portion formed in a curved shape of a protrusion toward the rear.
The waist receiving portion is formed with a restricting portion for restricting the upward movement of the backrest portion with respect to the waist receiving portion by abutting the locked portion formed on the backrest portion. The fixed structure of the child seat according to any one of 1 to 4. チャイルドシートが、請求項１から５のいずれか１項に記載のチャイルドシートの固定構造によって自転車の荷台に固定されている、チャイルドシート付き自転車。 A bicycle with a child seat, wherein the child seat is fixed to the bed of the bicycle by the fixing structure of the child seat according to any one of claims 1 to 5.
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