WO2011013749A1

WO2011013749A1 - Caster for baby carriage and baby carriage

Info

Publication number: WO2011013749A1
Application number: PCT/JP2010/062791
Authority: WO
Inventors: 健二舟倉
Original assignee: コンビ株式会社
Priority date: 2009-07-31
Filing date: 2010-07-29
Publication date: 2011-02-03
Also published as: TW201111210A; JP2011031724A; TWI513615B

Abstract

A caster (40) comprises a caster body (55), a support member (60) which is rotatably supported by the caster body, a shaft member (50) which extends through the support member and which is rotatably supported by the support member (60), and a pair of wheels (45) through which the shaft member extends and which are rotatably supported by the shaft member. The wheels (45) are arranged on opposite sides of the support member (60) located therebetween. An adjuster (70) is provided between at least one of the pair of wheels and the support member. The adjuster (70) is supported by the shaft member and is elastically deformed so as to be compressed in the axial direction of the shaft member.

Description

Stroller casters and strollers

The present invention relates to a caster used in a stroller, and more particularly, to a stroller caster capable of suppressing fine vibrations of wheels around a caster axis. The present invention also relates to a stroller having such a caster.

Conventionally, casters having wheels have been widely known and used in various fields, for example, strollers (for example, JP2008-254688A). The caster can not only hold the wheel rotatably about the rotation axis but also rotate the wheel together with its shaft member around the caster axis extending substantially perpendicular to the rotation axis of the wheel.

The caster is often used as a holding mechanism for holding a wheel located forward in the traveling direction in a baby stroller. In such a caster, the wheel and its shaft member rotate around the caster axis in accordance with the direction of the propulsive force applied from the operator to the stroller. Thereby, it becomes possible to realize the turning of the stroller intended by the operator.

However, when a stroller with a caster is driven straight, there may be a slight vibration of the wheel and its axle around the caster axis. In particular, in a caster having a relatively large play between the members constituting the caster, such as a caster generally used in a stroller, the wheel is likely to be slightly vibrated. When the wheel is slightly vibrated in the caster used for the baby stroller, the stability of the baby stroller is remarkably lowered, and the ride comfort of the baby stroller is significantly lowered.

The present invention has been made in consideration of such points, and an object of the present invention is to provide a stroller caster capable of suppressing fine vibrations of wheels around a caster axis, and a stroller having the caster. And

A caster for a stroller according to an aspect of the present invention includes a caster body, a support member rotatably supported by the caster body, and a shaft member that passes through the support member and is rotatably supported by the support member. A pair of wheels respectively disposed on both sides of the support member, the pair of wheels penetrating the shaft member and rotatably supported by the shaft member, and at least one of the pair of wheels An adjustment member supported by the shaft member between the wheel and the support member and compressible in the axial direction of the shaft member by elastic deformation is provided.

In the stroller caster according to an aspect of the present invention, the adjustment member is penetrated by the shaft member at a position between the wheel and the support member, is rotatable around the shaft member, and is capable of rotating around the shaft member. It may be supported on the shaft member so as to be slidable in the axial direction.

In the stroller caster according to the aspect of the present invention, the adjustment member may be compressed between the wheel and the support member in a normal state.

Furthermore, in the stroller caster according to an aspect of the present invention, the adjustment member may be provided between the other wheel of the pair of wheels and the support member. Alternatively, in the stroller caster according to one aspect of the present invention, a spacer may be provided between the other wheel of the pair of wheels and the support member.

Furthermore, in the stroller caster according to an aspect of the present invention, the adjustment member may be a spring washer, a wave washer, a disc spring, a compression spring, or rubber.

Further, the stroller caster according to an aspect of the present invention further includes a plain washer disposed between the adjustment member and one or both of the wheel and the support member and penetrating the shaft member. It may be.

Further, in the stroller caster according to one aspect of the present invention, the support member, the pair of wheels, and the adjustment member are slidable with respect to the shaft member in the axial direction of the shaft member. May be located in one section along the axial direction.

A stroller according to an aspect of the present invention includes a stroller body having a front leg and a rear leg, and any one of the casters according to the aspect of the present invention attached to at least one of the front leg and the rear leg. The caster body of the caster is fixed to at least one of the front leg and the rear leg.

According to the present invention, it is possible to effectively suppress the slight vibration around the caster axis with respect to the caster body of the support member that supports the wheel.

FIG. 1 is a perspective view showing a stroller for explaining an embodiment of the present invention. FIG. 2 is a side view showing the stroller of FIG. FIG. 3 is a partial cross-sectional view showing the caster from the side. FIG. 4 is an exploded perspective view showing a part of the caster. FIG. 5 is a longitudinal sectional view showing a part of the caster from the rear. FIG. 6 is a view corresponding to FIG. 5 and showing a modification of the caster. FIG. 7 is a view corresponding to FIG. 5 and showing another modified example of the caster. FIG. 8 is a view corresponding to FIG. 5 and showing still another modification of the caster.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 to 8 are views for explaining one embodiment of a stroller and a caster according to the present invention and a modification thereof. Among these, FIG. 1 and FIG. 2 show the overall configuration of the stroller. The stroller 10 shown in FIGS. 1 and 2 includes a stroller body 11 having a frame portion 20 having a pair of front legs 22 and a pair of rear legs 24 and a handle 36 that is swingably connected to the frame portion 20. It has. Casters 50 having wheels 45 are attached to the lower ends of the pair of front legs 22 and the pair of rear legs 24.

In the stroller 10 according to the present embodiment, the handle 36 is swung with respect to the frame portion 20, so that the operator (guardian) holds the handle 36 from the back side of the infant and operates the stroller 10. The stroller 10 is caused to run forward in the direction of travel (the state shown in FIG. 1 and the state indicated by the two-dot chain line in FIG. 2), and the handle is operated from the position on the front leg side where the operator faces the infant. It is possible to both handle the baby stroller 10 by gripping 36 and drive the baby stroller 10 so that the rear leg side of the baby stroller 10 is in the forward direction (shown by the solid line in FIG. 2). . That is, the handle 36 is configured to be releasably fixed at a facing pressing position indicated by a solid line in FIG. 2 and a back pressing position indicated by a two-dot chain line in FIG.

As shown in FIG. 1, the casters 40 attached to the front legs 22 and the rear legs 24 not only hold the wheels 45 rotatably about the rotation axis La, but also extend on the caster axis Lb intersecting the rotation axis La. As a center, the wheel 45 and the shaft member (axle) 50 that holds the wheel 45 can be rotated. However, the rotation of the wheel 45 and the shaft member 50 around the caster axis Lb can be restricted by the lock mechanism 42 (see FIG. 3). The restriction and release of the rotation by the lock mechanism 42 are performed in conjunction with the position of the handle 36. Specifically, with respect to the caster 40 attached to the leg located forward in the movement direction of the front leg 22 and the rear leg 24, the wheel 45 and the shaft member 50 can be rotated around the caster axis Lb. As for the casters 40 attached to the legs located rearward in the moving direction, the rotation of the wheel 45 and the shaft member 50 around the caster axis Lb is restricted. According to such an aspect, when the operator (guardian) grips the handle 36 from the back side of the infant and steers the stroller 10, the handle 36 is moved from the position on the front leg side where the operator faces the infant. In any of the cases where the stroller 10 is gripped and operated, the stroller 10 can be smoothly turned during traveling.

In addition, the structure which enables the handle | steering-wheel 36 to rock | fluctuate with respect to the frame member 20, and the lock mechanism 42 which controls rotation of the wheel 45 and the shaft member 50 centering on the caster axis line Lb are well-known structures, for example, the above-mentioned. The configuration disclosed in JP2008-254688A can be employed. Therefore, further detailed description is omitted in this specification.

In the present embodiment, the stroller 10 is configured to be foldable as disclosed in, for example, JP2008-254688A so as to be widely used. Specifically, the configuration is as follows.

The baby stroller 10 is generally symmetric with respect to a lateral center plane along the front-rear direction. As shown in FIGS. 1 and 2, the frame portion 20 in the present embodiment is disposed on the left and right, respectively, with a pair of front legs 22 disposed on the left and right, a pair of rear legs 24 disposed on the left and right, respectively. It has a pair of armrests 28 and a pair of connecting rods 26 arranged on the left and right respectively. The upper end portion of the front leg 22 is connected to a front portion of an armrest 28 disposed on the corresponding side (left side or right side) so as to be rotatable (swingable). Similarly, the upper end of the rear leg 24 is connected to the front portion of the armrest 28 disposed on the corresponding side (left side or right side) so as to be rotatable (swingable). Further, the upper part of the connecting rod 26 is connected to the rear part of the armrest 28 arranged on the corresponding side (left side or right side) so as to be rotatable (swingable).

The frame unit 20 further includes a left side connecting member 32 that connects the left front leg 22 and the left connecting rod 26, and a right side connecting member 32 that connects the right front leg 22 and the right connecting rod 26. Each side connecting member 32 has a front portion thereof rotatably connected to an intermediate portion of the front leg 22, and a rear portion thereof rotatably connected to a lower portion of the connecting rod 26. The frame portion 20 further includes a left bracket 34 that connects the left rear leg 24 and the left connecting rod 26, and a right bracket 34 that connects the right rear leg 24 and the right connecting rod 26. . Each bracket 34 is pivotally connected to a middle portion of the rear leg 24 in a part thereof, and is pivotally connected to a lower part of the connecting rod 26 in the other part.

The handle 36 is swingably connected to the frame portion 20 having such a configuration. The handle 36 is pivotally connected to the bracket 34 on the corresponding side at both ends of the U-shape. The rotation axis (swing center) of the handle 36 with respect to the bracket 34 coincides with the rotation axis of the bracket 34 and the connection rod 26 and the rotation axis of the connection rod 26 and the side connection member 32. Yes. Further, the handle 36 in the back pushing position is rotatably connected to the armrest 28.

The stroller 10 having the overall configuration as described above can be folded by rotating the constituent members with respect to each other. Specifically, the bracket 34 is rotated with respect to the rear leg 24 in the clockwise direction in FIG. With this operation, the armrest 28 and the side connecting member 32 are rotated clockwise in FIG. 2 with respect to the connecting rod 26. By such an operation, the handle 36 and the front leg 22 are arranged substantially parallel in a side view, and the arrangement position of the handle 36 is lowered. As described above, the stroller 10 can be folded, and the size of the stroller along the front-rear direction and the vertical direction can be reduced. On the other hand, in order to unfold the stroller 10 from the folded state, a procedure reverse to the above-described folding operation may be performed.

Next, the caster 40 will be described mainly with reference to FIGS. In addition, casters 40 for front legs are respectively provided at the lower ends of the pair of front legs 22. The two front leg casters 40 are identical to each other. Further, rear leg casters 40 are respectively provided at the lower ends of the pair of rear legs 24. The two rear leg casters 40 are identical to each other. Further, the caster 40 attached to the front leg 22 and the caster 40 attached to the rear leg 24 can be configured essentially the same except for the attachment structure to the

legs

22, 24. Therefore, here, the caster 40 attached to the front leg will be described as an example.

As described above, the caster 40 not only holds the wheel 45 rotatably about the rotation axis La, but also the wheel 45 and the wheel about the caster axis Lb extending in a direction intersecting the rotation axis La of the wheel 45. The shaft member (axle) 50 that holds 45 can be rotated. Specifically, the configuration is as follows.

As shown in FIG. 3, the caster 40 includes a caster body 55 fixed to a lower end of a leg (the front leg 22 in the illustrated example), a support member 60 rotatably supported by the caster body 55, and a support member 60. And a pair of wheels 45 rotatably supported by the shaft member. As shown in FIG. 5, the shaft member 50 penetrates the support member 60, and the pair of wheels 45 are attached to the shaft member 50 with the support member 60 interposed therebetween.

As shown in FIG. 3, the caster main body 55 has an attachment portion 56 attached to the leg and a caster shaft member 57 fixed to the attachment portion 56 with a pin 58. The attachment portion 56 is formed with an opening portion 56a that opens toward the road surface when attached to the leg of the stroller body 11. The caster shaft member 57 is disposed in the opening 56a of the attachment portion 56, and hangs down in the opening 56a toward the road surface.

As shown in FIG. 3, the support member 60 has a base portion 61 partially extending into the opening portion 56a of the attachment portion 56, and a bracket 62 attached to the base portion 61 via a pin 61a. ing. The base portion 61 is supported via the flange portion 57a of the caster shaft member 57 so as to be rotatable about the caster axis Lb. The bracket 62 is formed with a hole 63 inserted through the shaft member 50. A brake member 64 is swingably attached to the bracket 62. The brake member 64 can regulate the rotation of the wheel 45 relative to the bracket 62 by swinging with respect to the bracket 62 and engaging with the wheel 45.

Incidentally, as shown in FIG. 3, the caster shaft member 57 that defines the caster axis Lb extends substantially orthogonal to the traveling surface (road surface) of the stroller 10 in the unfolded state. Therefore, the caster axis Lb extends perpendicular to the traveling surface. According to such a caster 40, the support member 60 rotates with respect to the caster main body 55, so that the wheel 45 can smoothly turn with respect to the front-rear direction of the stroller 10.

Further, the rotation axis of the shaft member 50 with respect to the support member 60 and the rotation axis of the wheel 45 with respect to the shaft member 50 coincide with each other. As a result, the rotation axis La of the wheel 45 with respect to the support member 60 coincides with both the rotation axis of the shaft member 50 with respect to the support member 60 and the rotation axis of the wheel 45 with respect to the shaft member 50, and in this embodiment is parallel to the traveling surface. Extend to. Further, as shown in FIG. 3, the rotation axis La is not disposed on the extension of the caster axis Lb. That is, when the stroller 10 in the unfolded state is placed on the traveling surface, the rotation axis La and the caster axis Lb are positioned so as to be shifted in a direction parallel to the traveling surface. According to such a caster 40, the stroller 10 can be pushed in a desired direction by adjusting the direction of the propulsive force applied to the stroller 10 from the operator.

Incidentally, as shown in FIG. 4 and FIG. 5, the shaft member 50 in the present embodiment is configured by a pin 52. A through hole 52 b is formed at one end of the pin 52, and a head 52 a having an enlarged diameter is formed at the other end of the pin 52. The pin 52 extends through the one wheel 45a, the bracket 62 of the support member 60, and the other wheel 45b. A snap pin 53 is attached to the end portion of the pin 52 where the through hole 52b is formed, through the through hole 52b. The pair of wheels 45 and the bracket 62 of the support member 60 are disposed in a section between the head 52 of the pin 52 that forms the shaft member 50 and the snap pin 53, and the axial direction of the shaft member 50 is within this section. It is slidable with respect to the shaft member 50 along (that is, a direction parallel to the rotation axis La). As shown in FIGS. 4 and 5, a flat washer (flat washer) 54 may be provided between the other wheel 45 b and the snap pin 53 so as to penetrate the pin 52.

Further, in the present embodiment, as shown in FIGS. 4 and 5, the axial direction of the shaft member 50 (that is, parallel to the rotational axis La) is provided between the one wheel 45 a and the bracket 62 of the support member 60. The adjusting member 70 is provided so as to be elastically deformed so that the length along the axial direction of the shaft member 50 is shortened. The adjustment member 70 is supported on the shaft member 50. In the example shown in FIGS. 4 and 5, the adjustment member 70 is configured by a spring washer (spring washer). In this example, the adjustment member 70 is penetrated by the shaft member 50 at a position between the one wheel 45 a and the support member 60. Further, the adjustment member 70 is rotatable on the shaft member 50 so as to be rotatable around the axial direction of the shaft member 50 and to be slidable with respect to the shaft member 50 along the axial direction of the shaft member 50. It is supported.

In the present embodiment, as shown in FIGS. 4 and 5, the shaft member is provided between the adjusting member 70 and the one wheel 45 a and between the adjusting member 70 and the bracket 62 of the support member 60. A flat washer (flat washer) 68 penetrating through 50 is provided. Each plain washer 68 is rotatable with respect to the shaft member 50 around the axial direction of the shaft member 50 and is slidable with respect to the shaft member 50 along the axial direction of the shaft member 50. It is supported on the shaft member 50.

Furthermore, in this embodiment, as shown in FIGS. 4 and 5, a spacer 66 is provided between the other wheel 45 b and the bracket 62 of the support member 60. The spacer 66 is provided for the purpose of securing an appropriate distance between the other wheel 45 b and the support member 60. Specifically, as shown in FIG. 5, the length da along the rotation axis La from the caster axis Lb to the one wheel 45a and the length along the rotation axis La from the caster axis Lb to the other wheel 45b. The spacer 66 keeps a distance between the other wheel 45b and the support member 60 so that the length db is substantially the same. In the example shown in FIGS. 4 and 5, the spacer 66 is configured as a sleeve-like member, in other words, as a cylindrical member. The spacer 66 can rotate with respect to the shaft member 50 about the axial direction of the shaft member 50 and can slide with respect to the shaft member 50 along the axial direction of the shaft member 50. Supported on member 50.

When the stroller 10 using the caster 40 configured as described above is run, the micro vibration around the caster axis Lb with respect to the caster body 55 of the support member 60 that supports the wheel 45 and the shaft member 50 is effectively suppressed. can do. Although the mechanism that can suppress the minute vibration around the caster axis Lb of the support member 60 (wheel 45) is not clear, a mechanism that can be considered as one factor will be described below. However, the present invention is not limited to the following mechanism.

In a general caster, in order to make it easy to apply a force for rotating the support member 60 to the caster body 55 around the caster axis Lb, the shaft member 50 that rotatably holds the wheel 45 is provided with the caster axis Lb. It is not on the extension, but at a position shifted from the caster axis Lb along the traveling surface. And while the propulsive force which is going to drive the stroller 10 straightly is applied to the stroller 10 from the operator, the shaft member 50 (rotation axis La) holding the wheel 45 is moved from the caster axis Lb by this propulsive force. Even at the rear position, a force that maintains the direction perpendicular to the traveling direction acts on the caster 40.

On the other hand, as described above, in the caster 40 that is generally used in the stroller 10, play between the support member 60 and the shaft member 50 is used instead of using an expensive bearing member manufactured with high accuracy. And the play between the shaft member 50 and the wheel 45 is ensured largely. For this reason, it is expected that the wheels 45 and the shaft member 50 will move relative to the support member 60 while the stroller 10 is traveling. When each wheel 45 and the shaft member 50 move relative to the support member 60, a distance da along a direction orthogonal to the traveling direction of the stroller 10 from one of the pair of wheels 45 to the caster axis Lb, and the pair The distance db along the direction orthogonal to the traveling direction of the stroller 10 from the other 45b of the wheels 45 to the caster axis Lb is different. As a result, the balance of moment applied to the support member 60 from the wheels 45a and 45b to rotate the support member 60 with respect to the caster body 55 about the caster axis Lb is lost, and the support member 60 is moved to the caster body. It is expected that a force is generated to rotate 55 in one rotation direction.

It is presumed that such a situation is one cause of causing the fine vibration of the support member 60 around the caster axis Lb.

According to the present embodiment, the adjusting member 70 that can be compressed in the axial direction of the shaft member 50 by elastic deformation (corresponding to the direction of the rotation axis La) is provided between the wheel 45 and the support member 60. 50. The adjustment member 70 effectively suppresses relative movement of the shaft member 55 relative to the support member 60 due to play between the support member 60 and the shaft member 50 and play between the shaft member 50 and the wheel 45. be able to. Thereby, it is estimated that the fine vibration of the support member 60 around the caster axis Lb can be extremely effectively suppressed.

As a result, according to the present embodiment, it is possible to suppress the fine vibration of the support member 60 around the caster axis Lb and to ensure excellent running stability. Moreover, since the travel of the stroller 10 is stabilized, the ride comfort of the stroller 10 can be improved.

The adjusting member 70 can be compressed by elastic deformation. Therefore, the play of the support member 60 and the wheel 45 with respect to the shaft member 50 is not lost. For this reason, the rotation of the wheel 45 with respect to the shaft member 50 and the support member 60 is not significantly hindered by the adjustment member 70. Therefore, during straight traveling, the stroller 10 can be traveled by lightly pushing while suppressing the slight vibration of the support member 60 that supports the wheel 45 and the shaft member 45 as described above. Further, when the stroller 10 is turned, the pair of wheels 45 supported by the casters 40 can be independently rotated. Therefore, it is possible to prevent the stroller 10 from being difficult to turn slightly due to the difference in the movement path between the inner wheel and the outer wheel of the pair of wheels 45 during turning. From these things, it becomes possible to maintain the maneuverability of the stroller 10 without greatly deteriorating.

Further, in the present embodiment, flat washers 68 are provided on both sides of the adjustment member 70 made of a spring washer. Therefore, the force applied from the adjusting member 70 to the wheel 45 when the adjusting member 70 is compressed can be dispersed by the plain washer 68. Thereby, it can suppress effectively that the adjustment member 70 controls rotation of the wheel 45, and the more free rotation with respect to the shaft member 50 and the support member 60 of the wheel 45 can be ensured.

Furthermore, in the present embodiment, a spacer 66 is provided between the other wheel 45b and the bracket 62 of the support member 60 to adjust the distance between the other wheel 45b and the bracket 62. For this reason, the length da along the rotation axis La from the caster axis Lb to the one wheel 45a is substantially the same as the length db along the rotation axis La from the caster axis Lb to the other wheel 45b. Can be. As a result, it is possible to balance the moment applied to the support member 60 from each wheel 45a, 45b to rotate the support member 60 with respect to the caster body 55 around the caster axis Lb. The fine vibration around the caster axis Lb of the support member 60 can be further effectively suppressed.

According to the present embodiment as described above, the adjusting member 70 that is compressible in the axial direction of the shaft member 50 by elastic deformation is supported by the shaft member 50 between the wheel 45 and the support member 60. The relative adjustment of the shaft member 50 with respect to the support member 60 in the axial direction of the shaft member 50 caused by play of the support member 60 with respect to the shaft member 50 and the wheel 45 without greatly hindering the rotation of the wheel 45 by the adjusting member 70. The movement can be effectively suppressed. As a result, the fine vibration around the caster axis Lb with respect to the caster main body 55 of the support member 60 that supports the wheel 45 and the shaft member 50 can be effectively suppressed.

Further, according to the present embodiment, the adjustment member 70 is constituted by a spring washer. Therefore, the micro vibration around the caster axis Lb with respect to the caster main body 55 of the support member 60 that supports the wheel 45 and the shaft member 50 can be effectively suppressed by a configuration that can be realized extremely easily and inexpensively.

Note that various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described.

For example, in the above-described embodiment, an example in which the adjustment member 70 is configured by a spring washer (spring washer) has been described, but the present invention is not limited thereto. For example, another member that can be supported on the shaft member 50 and can be compressed in the axial direction of the shaft member 50 by elastic deformation, specifically, a wave washer, a disc spring, a compression spring, rubber (for example, The adjusting member 70 may be made of a sleeve-like rubber). In the example shown in FIG. 6, the adjustment member 71 is composed of a wave washer. A wave washer is a washer whose plate surface is wavy, and is also called a wave washer. Moreover, in the example shown in FIG. 7, the adjustment member 72 is comprised from the disk spring. Here, the disc spring is a dish-like member with the bottom removed, and is also called a dish washer. Furthermore, in the example shown in FIG. 8, the adjustment member 73 is comprised from the compression spring. 6 to 8, the configuration other than the

adjustment members

71, 72, 73 can be configured in the same manner as the above-described embodiment.

In the above-described embodiment, for example, as shown in FIG. 5, an example in which the adjustment member 70 is provided with a gap with respect to a member (a flat washer 68 in the illustrated example) disposed next to the adjustment member 70. Although shown, it is not limited to this. The adjustment member 70 is disposed in contact with the adjacent member, and in a normal state (in other words, in a state where no external force is applied), between the wheel 45 and the support member 60. You may arrange | position so that it may be compressed. According to such a modification, in a normal state, the shaft member 50 with respect to the support member 60 caused by play between the support member 60 and the shaft member 50 and play between the shaft member 50 and the wheel 45 is normal. Relative movement can be suppressed very effectively.

Furthermore, in the above-described embodiment, the example in which the flat washers 68 are provided on both sides of the adjustment member 70 between the wheel 45 and the support member 60 has been described, but the present invention is not limited thereto. A flat washer may not be provided between the wheel 45 and the support member 60, or a flat washer is provided only on one side of the adjustment member 70 between the wheel 45 and the support member 60. It may be.

Furthermore, in the above-described embodiment, the example in which the spacer 66 is disposed between the other wheel 45b and the support member 60 has been described, but the present invention is not limited thereto. For example,

adjustment members

70, 71, 72, 73 may be arranged between the other wheel 45 b and the support member 60. At this time, the adjustment member disposed between the one wheel 45a and the support member 60 and the adjustment member disposed between the other wheel 45b and the support member 60 are configured by the same member. The length da along the rotation axis La from the caster axis Lb to the one wheel 45a is substantially the same as the length db along the rotation axis La from the caster axis Lb to the other wheel 45b. be able to. Alternatively, instead of providing the spacer 66 between the other wheel 45b and the support member 60, the boss (bearing portion) 46b of the other wheel 45b may be longer than the boss 46a of the one wheel 45a. Good. Or you may make it the boss | hub (bearing part) 62a of the bracket 62 of the support member 60 be longer than the length which protrudes toward one wheel 45a, and protrudes toward the other wheel 45b.

Furthermore, in the above-described embodiment, the example in which the pin 52 (shaft member 50) is prevented from falling off from the support member 60 by engaging the snap pin 53 with the through hole 52b of the pin 52 has been described. It is not limited to this. For example, as shown in FIGS. 6 to 8, the two

nuts

53a and 54a are fixed to the end of the pin 52 on which the screw is formed, so that the pin 52 (the shaft member 50) is detached from the support member 60. It may not be possible. In the illustrated example, a push nut 53 a and a cap nut 54 a disposed outside the push nut 53 a are screwed into the pin 52.

Furthermore, the configuration of the stroller body 11 of the stroller 10 described in the above embodiment is merely an example. For example, the frame unit 20 may be configured such that it cannot be folded. In the stroller body 11 of the stroller 10 described in the above-described embodiment, the handle 36 is configured to be swingable between the back pressing position and the facing pressing position. However, the present invention is not limited thereto. The handle 36 may be configured to remain fixed at the back pushing position. Further, in the above-described embodiment, the caster 40 in which the wheel 45 can rotate about the rotation axis La and the wheel 45 can rotate about the caster axis Lb is provided on both the front leg 22 and the rear leg 24. Although the example which was attached was shown, it is not restricted to this. The caster 40 is attached to only one of the front leg 22 and the rear leg 24, and the holding mechanism in which the wheel 45 is not rotatable about the caster axis Lb is attached to the other of the front leg 22 and the rear leg 24. It may be.

In addition, although the some modification with respect to embodiment mentioned above was demonstrated above, naturally, it is also possible to apply combining several modifications suitably.

Claims

The caster body,
A support member rotatably supported by the caster body;
A shaft member that penetrates the support member and is rotatably supported by the support member;
A pair of wheels respectively disposed on both sides of the support member, the pair of wheels penetrating the shaft member and rotatably supported by the shaft member;
An adjustment member supported by the shaft member between at least one of the pair of wheels and the support member, and compressible in the axial direction of the shaft member by elastic deformation. Caster for strollers.
The adjusting member is penetrated by the shaft member at a position between the wheel and the support member, is rotatable on the shaft member, and is slidable in the axial direction of the shaft member. The stroller caster according to claim 1, wherein the caster is supported by the baby carriage.
The stroller caster according to claim 1, wherein the adjustment member is compressed between the wheel and the support member in a normal state.
The stroller caster according to claim 1, wherein the adjustment member is provided between the other wheel of the pair of wheels and the support member.
The stroller caster according to claim 1, wherein a spacer is provided between the other wheel of the pair of wheels and the support member.
The stroller caster according to claim 1, wherein the adjustment member is a spring washer, a wave washer, a disc spring, a compression spring, or rubber.
The stroller caster according to claim 1, further comprising a flat washer disposed between the adjustment member and one or both of the wheel and the support member and penetrating the shaft member. .
The support member, the pair of wheels, and the adjustment member are positioned in a section along the axial direction on the shaft member so as to be slidable with respect to the shaft member in the axial direction of the shaft member. The stroller caster according to claim 1, wherein:
A stroller body having a front leg and a rear leg;
The caster according to any one of claims 1 to 8, which is attached to at least one of the front leg and the rear leg.
A stroller characterized in that a caster body of the caster is fixed to at least one of the front leg and the rear leg.