JP5166141B2 - Children's vehicle - Google Patents

Description

  The present invention relates to children's vehicles such as children's motorcycles and children's tricycles.

As conventional techniques related to the vehicle for children according to the present invention, for example, there are the following Patent Documents 1 and 2.
JP 2002-120784 A Japanese Patent No. 3676455

  Patent Document 1 discloses a children's two-wheeled vehicle (hereinafter referred to as “bicycle”) provided with a pusher bar. This bicycle can be used like a stroller, for example, by putting a child on the bicycle and a guardian operating the push bar. In this bicycle, when the guardian pushes the bicycle, the child's foot sitting on the saddle may come into contact with the pedal or the pedal crank, and in particular, the rotation of the drive wheel is applied to the crankshaft that supports the pedal crank. In a transmitted bicycle, there is a high possibility that the foot will come into contact with the pedal or pedal crank.

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a handcart-used tricycle (hereinafter referred to as “tricycle”) having a footrest on which both feet of a child sitting on a saddle are placed. This footrest can prevent the foot from touching the pedal or the pedal crank by placing the foot of the child sitting on the saddle when the tricycle is used like a stroller. That is, by providing the bicycle with a footrest as provided in the tricycle, it is possible to prevent the foot from contacting the pedal or the pedal crank.

  Bicycles and tricycles equipped with footrests as described above may be used while switching between the state where the child himself moves and the state where the guardian pushes, so each time the state is switched to each state. In addition, it is necessary to remove and attach the footrest. Further, since a normal footrest is attached to a bicycle or tricycle by screwing or the like, a tool such as a screwdriver is required for removing and attaching the footrest.

  However, it is troublesome to remove and attach the footrest using a tool each time the state is switched to the above state. For example, when you go out with your child, use a bicycle or tricycle like a stroller on the way back and forth, and if your child plays with a bicycle or tricycle in a park, etc. Removal and installation must be performed and tools must be carried.

  An object of the present invention is to deal with such a problem. That is, when using a child vehicle such as a two-wheeled vehicle or a three-wheeled vehicle like a stroller without using a footrest, preventing a foot or pedal crank from touching the foot, or a child vehicle such as a two-wheeled vehicle or a three-wheeled vehicle as a stroller The pedal can be used as a footrest when a child vehicle such as a two-wheeled vehicle or a three-wheeled vehicle is used like a stroller. Making it possible is the object of the present invention.

  In order to achieve the above object, a child vehicle according to the present invention has at least the following configuration.

  That is, in the child vehicle for transmitting the rotation of the pedal crank supported via the support means to the crankshaft rotatably supported with respect to the vehicle body frame to the driving wheel via the crankshaft, the support means Is formed on the pedal crank so as to rotate integrally with the crankshaft coaxially with the rotation shaft of the crankshaft, and the pedal crank is arranged in the direction of the rotation axis with respect to the support portion. A fitting hole that is slidably connected so as to be free to rotate about the rotation shaft, and is provided across the support portion and the fitting hole, and by sliding the pedal crank, the axial direction of the support portion is provided. Engaging means for engaging and disengaging along the engaging portion, and the engaging means rotates the pedal crank with respect to the support portion in the engaged state. Connected so as to be immovable in the direction, in the disengaged state, characterized in that for coupling to a free rotation state the fitting portion to the support portion.

  The engagement means includes an engagement body having a cross-sectional shape in a direction orthogonal to the rotation axis excluding a perfect circle, and an engagement hole having a shape that fits and engages with the engagement body. One of the engagement body and the engagement hole is provided in the support portion, and the other is provided in the fitting hole.

  A guide engaging portion that guides the slide and idle rotation of the pedal crank is provided across the support portion and the fitting hole, and the guide engaging portion is fitted to the guide shaft portion and the guide shaft portion. And a guide fitting portion.

  The support portion includes blocking means for blocking and releasing blocking of the pedal crank, and the blocking means is provided on the support body, and slides in a disengagement direction of the pedal crank and slides in the engagement direction. Two stopper portions for restricting, a fixed support plate that is provided so as to slide integrally with the pedal crank, and that supports one side of the pedal crank facing in the sliding direction, and that slides integrally with the fixed support plate Is provided to support the other surface of the pedal crank, and engages / disengages with respect to any one of the stopper portions to prevent the pedal crank from sliding in the engaged state, and to disengage the pedal crank slide in the disengaged state. And a movable support for releasing the blocking state.

  A support member that supports the pedal crank at an arbitrary angle along the direction of rotation when the pedal crank is in an idle state is detachably attached to the vehicle body frame.

  The best mode for carrying out a vehicle for children according to the present invention will be described below with reference to the drawings. In this embodiment, the child vehicle is exemplified as a children's motorcycle (hereinafter referred to as “bicycle”).

  As shown in FIGS. 1 and 2, the bicycle A of this embodiment is well known as a bicycle for children having a body frame B and a push bar C. In the figure, D is a front wheel, E is a rear wheel that is a driving wheel, F is a steering wheel, G is a pedal portion, H is a saddle, and I is an auxiliary wheel. Hereinafter, the front wheel side is the front, the rear wheel side is the rear, and the direction orthogonal to the front-rear direction in the plane direction is the left-right direction.

  The pedal portion G has a pedal crank 3 provided with a pedal 2 on one end side on the left and right sides at the end of the crankshaft 1 supported at the center lower end of the frame B with the rotation axis as the left-right direction. The rotation of the pedal crank 3 is transmitted. In the figure, reference numeral K denotes a sprocket, and a chain that transmits the rotation of the sprocket K to the rear wheel E over a sprocket (not shown) that is pivotally supported coaxially with the rear wheel E (not shown). (Not shown) is wound. The chain is stored in a chain cover J.

  The pedal crank 3 is supported with respect to the crankshaft 1 through a support means 4 so as to be slidable in the left-right direction (the direction of the rotation axis CL of the crankshaft 1) and switchable between integral rotation and free rotation. (See FIGS. 4 to 5). The support portion of the pedal crank 3 is an end portion on the opposite side to the pedal side, and the support portion and the support means 4 are covered with a cover portion 30 that slides and rotates in the same body as the pedal crank 3. (See FIGS. 4 to 5). One support means 4 is provided corresponding to each of the left and right pedal cranks 3, and the sprocket K is fixed to one support means 4.

  In the figure, reference numeral L denotes a support member that supports the pedal crank 3 at an arbitrary angle along the rotation direction when the pedal crank 3 is in the idle state. In this embodiment, the pedal crank 3 is supported at an angle with the longitudinal direction thereof being the horizontal direction so that the pedal 2 can be used as a footrest. The support member L of the present embodiment includes a suspension plate L1 that is hooked from above on the front and rear pipes B1 of the vehicle body frame B, and a hook that is connected to the left and right ends of the suspension plate L1 and hooks on the pedal shaft 21 of the pedal 2. A concave portion L4 that is fixed to the lower side of the center portion of the suspension plate L1 and that forms an annular portion L3 that is attached to the front and rear pipes B1 of the vehicle body frame B by the suspension plate L1. It is composed of

  The suspension plate L1 of the present embodiment is a position where the hook portion L2 holds the horizontal state of the pedal crank 3 when the suspension plate L1 is hooked on the front-rear pipe B1 using an elastic synthetic resin material or metal material. The pedal shaft 21 is formed in a shape that can support the pedal shaft 21 (in the figure, an inverted V shape). In addition, the hook portion L2 of the present embodiment is a plate-shaped member molded using a synthetic resin material or a metal material, and a recess L21 that is hooked on the pedal shaft 21 is formed. The concave body L4 of the present embodiment is separated from the left and right with a notch L41 formed in the center portion so as to expand. That is, the concave body L4 is separated from the notch L41 to the left and right to expand with the deformation extending the left and right suspension plates L1 to the left and right, and is attached to and detached from the front and rear pipes B1 in the vertical direction. Can do. In addition, the notch L41 of the concave body L4 is always closed by the elasticity of the suspension body L1, so that the attachment state to the front and rear pipes B1 can be maintained.

  The support member of the present invention is not limited to the configuration shown in this embodiment, and may be any configuration that can support the pedal shaft 21 and can be attached to and detached from the vehicle body frame B. In addition, the length of the suspension plate L1 may be adjusted so that the pedal shaft 21 can be supported at an angle other than the horizontal state (not shown).

  Next, the configuration of the support means 4 will be specifically described with reference to FIGS. In addition, since the structure of the right and left support means 4 in a present Example is the same structure, below, the support means 4 to which the sprocket K was fixed is demonstrated and illustrated, and description of the other support means 4 is abbreviate | omitted.

  In the drawing, reference numeral 30A denotes a cover part body of the cover part 30, and reference numeral 30B denotes a cover part that closes the cover part body 30A. The cover part body 30A and the cover part 30B are integrated by a screw 30C. .

  The support means 4 includes a support portion 5 provided so as to rotate integrally with the crankshaft 1 coaxially with the rotation axis CL of the crankshaft 1, and an end of the pedal crank 3 opposite to the pedal 2 side. The pedal crank 3 is slidable in the direction of the rotation axis CL with respect to the support portion 5 and is connected to the support portion 5 so as to be free to rotate with respect to the rotation axis CL. An engagement means 7 provided over the joint hole 6, the support portion 5 and the fitting hole 6, and engaged and disengaged along the axial direction of the support portion 5 by sliding of the pedal crank 3; A guide engaging portion 8 that guides the sliding and free rotation of the crank 3 and a blocking means 9 that blocks and releases the sliding of the pedal crank 3 are provided.

  The support portion 5 is threadedly engaged with a square hole 50 that fits and fits into a corner portion 10 formed on the peripheral surface of the end portion of the crankshaft 1 and a male screw 11 formed at the end portion of the crankshaft 1. The screw hole 51 to be formed is a cylindrical one continuously provided in the axial direction of the crankshaft 1. Moreover, the support part 5 is comprised from the 1st support member 5A and the 2nd support member 5B which are integrated by fitting so that it may adjoin by the rotating shaft CL direction of the crankshaft 1. As shown in FIG.

  The sprocket K is fixed to the first support member 5A, the square hole 50 is formed, and the screw hole 51 is formed in the second support member 5B. Further, the first support member 5 </ b> A constitutes one of the engagement means 7, an engagement body 71 to which the sprocket K is fixed, and a guide shaft portion 81 constituting one of the guide engagement portions 8. A half portion 81A is formed.

  A half portion 81B of the guide shaft portion 81 is formed on the second support member 5B. In the figure, reference numeral 52 denotes an internal thread portion formed on the first support member 5A, and the internal thread portion 52 is for screwing a dedicated tool (not shown) for removing the sprocket from the crankshaft 1. . Reference numeral 53 denotes a washer that holds the threaded state of the male screw 11 and the screw hole 51.

  The fitting hole 6 constitutes the other of the engaging means 7 on the inner periphery thereof, and is engaged with the engaging body 71 by sliding toward the sprocket K side of the pedal crank 3, and by sliding on the opposite side. An engagement hole 72 that is engaged and disengaged is formed. Further, a guide fitting hole 82 is formed which constitutes the other of the guide engaging portion 8 and communicates with the engaging hole 72 so as to be slidably and freely slidable with respect to the guide shaft portion 81. Has been.

  The engaging means 7 has a square shape in which the engaging body 71 and the engaging hole 72 are engaged with each other by fitting the shapes facing the rotation axis CL to each other. As a result, it becomes immobile in the rotational direction (see FIG. 5). In other words, in the engaged state of the engaging body 71 and the engaging hole 72, the fitting hole 6 can be made immovable in the rotational direction of the pedal crank 3 with respect to the support portion 5, whereby the pedal crank 3 Can be transmitted to the crankshaft 1 (the state in which the bicycle can be scooped and moved). Further, in the disengagement state between the engagement body 71 and the engagement hole 72, the fitting portion 6 can be in a loose state with respect to the support portion 5 (see FIG. 4), whereby the crankshaft It is possible to prevent the rotation of 1 from being transmitted to the pedal crank 3.

  In addition, the engaging means of this invention should just be the structure by which the said engagement hole 72 becomes a fixed state in a rotation direction with respect to the said engagement body 1 in an engagement state. In this embodiment, the engagement body 71 and the engagement hole 72 are shown as square shapes that fit and engage with each other. However, when the shapes are other than perfect circles, The engagement hole 72 can be fixed in the rotational direction with respect to the engagement body 1 (not shown).

  The guide engaging portion 8 has an inner diameter of the guide fitting hole 82 slightly larger than an outer diameter of the guide shaft portion 81. The pedal crank 3 can be smoothly slid and swung with respect to the guide shaft portion 81 without rattling.

  The blocking means 9 is provided on the support 5, and includes a stopper portion 91 that restricts sliding of the pedal crank 3 in the disengagement direction, a stopper portion 92 that restricts sliding of the pedal crank 3 in the engagement direction, A fixed support plate 93 that supports the surface of the pedal crank 3 on the sprocket K side from the axial direction of the support portion 5, a surface opposite to the surface of the pedal crank 3 on the sprocket K side, and the stopper 91 support the surface. The movable support 94 is configured to engage and disengage, prevent the pedal crank from sliding in the engaged state, and release the sliding state of the pedal crank 3 in the disengaged state. In the following, the surface of the pedal crank 3 opposite to the surface on the sprocket K side is referred to as a movable engagement surface and is denoted by reference numeral 91B.

  The stopper portion 91 is a disc-shaped member having a diameter larger than that of the guide shaft portion 81 and is integrally formed at the end portion of the guide shaft portion 81 so as to protrude in the radial direction. The stopper portion 92 has a square width of the engagement body 71 protruding from the end of the guide shaft portion 81 in the radial direction by making the square width of the engagement body 71 equal to the outer diameter of the guide shaft portion 81. Part. The opposing surfaces of these stopper portions 91 and 92 are referred to as stopper surfaces 91A and 92A. Then, the contact surface 82A secured around both ends of the guide engagement hole 82 is in contact with the stopper surface 91A, and the stopper surface 92A is secured on the surface opposite to the contact surface 82A. When the contact surface 82B comes into contact, the sliding of the pedal crank 3 is regulated.

  The contact surface 82A of the present embodiment has a bottom formed around the guide fitting hole 82 by a fitting recess 31 formed so that the disc-shaped stopper 91 fits into the pedal crank 3 and can be fitted. Part. In this embodiment, in a state where the stopper portion 91 is fitted in the fitting recess 31, the surface opposite to the stopper surface 91A is flush with the movable engagement surface 91B. is there. In the following description, the surface opposite to the stopper surface 91A is referred to as a fixed engagement surface and is denoted by reference numeral 91C.

  The contact surface 82B of the present embodiment has an engagement hole 72 formed so as to fit the engagement body 71 as described above, and communicates with the engagement hole 72 and is slightly smaller than the outer diameter of the guide shaft portion 81. Due to the relationship with the guide fitting hole 82 having a large diameter, it is a surface formed at the corner portion of the engagement hole 72, and the corner of the engagement body 71 projecting radially from the end of the guide shaft portion 81. This is a surface directly facing the stopper surface 92A as a part.

  The fixed support plate 93 uses a part of the cover portion 30 that covers the surface around the engagement hole 72 of the pedal crank 3. The surface around the engagement hole 72 is a supported surface 32 supported by the fixed support plate 93, and the fixed support plate 93 always supports and supports the supported surface 32.

  The movable support 94 is an example of a movable member 95 that is supported so as to be in contact with or separated from the support 5 along the radial direction, and an urging unit that urges the movable member 95 toward the support 5. A compression spring 96, and an operation member 97 that moves the movable member 95 away from the support body 5 in the radial direction against the urging force of the compression spring 96. The movable member 95 and the compression spring 96 are built in the cover portion 30. The operation portion 97 penetrates from the side surface of the cover portion 30 so as to be slidable in the radial direction, and is connected to the movable member 95, and is connected to the slide member 97A and outside the cover portion 30. And an operation knob 97B for sliding the slide member 97A.

  When the pedal crank 3 is in the disengaged state of the engagement means 7, the movable support 94 is integrated with the movable member 95, the compression spring 96, and the slide member 97A. By engaging the surface 91B with the fixed engagement surface 91C so as to support the movable engagement surface 91B and supporting the pedal crank 3 with the fixed support plate 93 in a sandwiched manner, the pedal crank 3 is prevented, and the loose state of the pedal crank 3 is maintained, and the disengagement state of the engaging means 7 is maintained (see FIG. 4).

  Further, when the pedal crank 3 is in the engaged state of the engaging means 7, the movable support 94 is integrated with the movable member 95, the compression spring 96, and the slide member 97A. By engaging between the mating surface 91B and the stopper surface 91A to support the movable engagement surface 91B, the pedal crank 3 is supported by the fixed support plate 93 so as to hold the pedal crank 3 in a sandwiched manner. This prevents the pedal crank 3 and the crankshaft 1 from rotating together and keeps the engagement means 7 engaged (see FIG. 5).

  The movable support 94 holds the operation knob 97B by hand and pulls the movable member 95 in the radial direction when releasing the sliding prevention state of the pedal crank 3, and moves the movable member 95 to the stopper surface 91A or the fixed engagement member. By moving from the mating surface 91C to the movable engagement surface 91B, the engagement by the movable support 94 is released, so that the pedal crank 3 can be slidable (sliding prevention release state) (see FIG. 6). ). Then, when the slide of the pedal crank 3 is completed, the movable member 95 comes into contact with the stopper surface 91A or the fixed engagement surface 91C by the urging force of the compression spring 96 by releasing the hand from the operation knob 97B. Therefore, the pedal crank 3 can be returned to the slide blocking state (see FIGS. 4 and 5).

  According to the bicycle A of the present embodiment, the rotation of the pedal crank 3 is transmitted to the crankshaft 1 due to the engagement of the engagement means 7, so that the bicycle A can be scooped and moved. In the disengaged state, the pedal crank 3 is in an idle state with respect to the support portion 5, so that when the bicycle A is pushed and moved by the pusher bar C, the rotation of the rear wheel E is the crankshaft 1. The pedal crank 3 can be prevented from rotating even if it is transmitted. Further, the operation of the blocking means 9 can be switched between a state in which the bicycle is used like a stroller and a state in which the child is bald.

  In the idle state of the pedal crank 3, by holding the pedal crank 3 in a horizontal state by the support member L, the child sitting on the saddle H when the bicycle A is used like a stroller is used. It can be used as a footrest (see FIG. 1). Further, when the support member L is not used, the pedal crank 3 hangs down so that the pedal 2 side is positioned below due to its own weight, and maintains that state (not shown). Therefore, when the bicycle A is used like a stroller, it is possible to prevent a child sitting on the saddle H from touching the pedal 2.

  Therefore, the bicycle A of this embodiment can prevent the foot from contacting the pedal 2 or the pedal crank 3 without using a footrest when the bicycle is used like a stroller. In addition, switching between the state in which the bicycle A is used like a baby stroller and the state in which the child himself is bald can be easily performed without using a tool or the like.

  In addition, the support means shown in the present embodiment can be applied to a tricycle in addition to the illustrated bicycle (two-wheeled vehicle). Further, the present invention is not limited to the illustrated embodiments, and can be implemented with configurations within a range that does not deviate from the contents described in the respective claims.

The perspective view which shows the state which uses the bicycle (two-wheeled vehicle) which shows an example of the vehicle for children concerning this invention as a stroller. FIG. 2 is an enlarged perspective view showing a main part of the bicycle shown in FIG. The exploded perspective view of a support means. The main part enlarged sectional view of the support means shows the disengagement state of the engagement means. The main part enlarged sectional view of the supporting means shows the engaged state of the engaging means. The main part enlarged sectional view of the support means shows a slidable state of the pedal crank.

Explanation of symbols

A: Bicycle (children's vehicle)
B: Body frame C: Pusher bar L: Support member CL: Rotating shaft 1: Crankshaft 2: Pedal 3: Pedal crank 4: Support means 5: Support portion 6: Fitting hole 7: Engagement means 8: Guide engagement Part 9: Blocking means 71: Engagement body 81: Guide shaft part 72: Engagement hole 82: Guide fitting hole 91: Stopper part 92: Stopper part 93: Fixed support plate 94: Movable support body

Claims (5)

In a child vehicle for transmitting the rotation of a pedal crank supported via a support means to a crankshaft rotatably supported with respect to a vehicle body frame to a driving wheel via the crankshaft,
The support means is
A support portion provided so as to rotate integrally with the crankshaft coaxially with the rotation shaft of the crankshaft;
A fitting hole formed on the pedal crank, the pedal crank being slidable in the direction of the rotation axis with respect to the support portion, and connected to be freely rotatable about the rotation axis;
Engagement means provided across the support portion and the fitting hole, and engaged and disengaged along the axial direction of the support portion by sliding the pedal crank;
With
In the engaged state, the engaging means connects the fitting hole to the support portion so as to be immobile in the rotation direction of the pedal crank, and in the disengaged state, the engaging portion is supported by the support portion. A child vehicle characterized by being connected so as to be in an idle state with respect to a part.   The engagement means includes an engagement body having a cross-sectional shape in a direction perpendicular to the rotation axis excluding a perfect circle, and an engagement hole having a shape that fits and engages with the engagement body. The child vehicle according to claim 1, wherein one of the engagement holes is provided in the support portion and the other is provided in the fitting hole.   A guide engaging portion that guides the slide and idle rotation of the pedal crank is provided across the support portion and the fitting hole, and the guide engaging portion is fitted to the guide shaft portion and the guide shaft portion. The child vehicle according to claim 1, further comprising a guide fitting portion.   The support portion includes blocking means for blocking and releasing blocking of the pedal crank, and the blocking means is provided on the support body, and slides in a disengagement direction of the pedal crank and slides in the engagement direction. Two stopper portions for restricting, a fixed support plate that is provided so as to slide integrally with the pedal crank, and that supports one side of the pedal crank facing in the sliding direction, and that slides integrally with the fixed support plate Is provided to support the other surface of the pedal crank, and engages / disengages with respect to any one of the stopper portions to prevent the pedal crank from sliding in the engaged state, and to disengage the pedal crank slide in the disengaged state. A child according to any one of claims 1 to 3, further comprising a movable support body that releases the blocking state. Vehicle.   5. The vehicle body frame is provided with a support member that supports the pedal crank at an arbitrary angle along the direction of rotation when the pedal crank is idle. Vehicle for children as described in the paragraph.

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