JP6850134B2 - Wheelbarrow - Google Patents

Description

The present invention relates to a wheelbarrow.

For example, as an example of a baby carriage provided with simultaneous left and right brakes for wheels, there is one disclosed in Japanese Patent Application Laid-Open No. 2005-14894 (Patent Document 1).

In Patent Document 1, left and right simultaneous braking mechanisms for simultaneously stopping the first and second wheels, which are provided on the first and second wheels supported by the axle and the first and second wheels, respectively. A baby carriage including a first and second wheel engaging device and a connecting means for interlocking the first and second wheel engaging devices is disclosed.

Japanese Unexamined Patent Publication No. 2005-14894

On the other hand, a suspension function has been proposed in which vibration caused by unevenness of the road surface is absorbed by a spring or the like when the traveling road surface is uneven, and the vibration is not transmitted to the main body frame. When such a function is adopted for the left and right simultaneous brakes, it is necessary to allow the vehicle body frame to move up and down, and it is necessary to allow a margin in the connecting means for connecting the first and second wheel engaging devices in an interlockable manner. There is a problem that the responsiveness of the brake operation to the wheels provided on the left and right is deteriorated.

Further, in general, the means for connecting the left and right simultaneous brakes includes an outer tube and an inner wire exposed from the outer tube and connected to the brake mechanism of the wheel. In order to improve the responsiveness of the left and right simultaneous brakes, it is necessary to stretch the inner wire without slack. However, when the above-mentioned suspension function is adopted for the left and right simultaneous brakes, the vehicle body frame cannot move up and down unless the inner wire has slack, and the suspension function cannot be exhibited.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a wheelbarrow having good responsiveness to the brake operation of the left and right simultaneous brakes.

The push wheel according to one aspect of the present invention includes a main body frame including a pair of legs arranged apart from each other in the width direction, and first and second wheels rotatably attached to the lower ends of the pair of legs. , Provided to stop the rotation of the first wheel, between the engaged position that engages with the first wheel and stops the rotation of the first wheel and the non-engaged position that does not engage with the first wheel. A first brake member that is displaced, an engagement position that is provided to stop the rotation of the second wheel and engages with the second wheel to stop the rotation of the second wheel, and a non-engagement position that does not engage with the second wheel. A second brake member that is displaced between the engaging positions, a connecting wire that connects the first brake member and the second brake member so that both brake members work together to perform a braking operation, and a first wheel. It is provided with a wire guide member which is attached to the axle of the wheel and guides a connecting wire drawn from one leg along an arcuate guide surface to a first brake member.

Preferably, the connecting wire includes an outer tube and an inner wire that is slidable in the outer tube, the inner wire having both ends exposed from the outer tube and connected to the first and second brake members. The wire runs along the arcuate guide surface of the wire guide member.

Preferably, the pair of legs comprises fixing members fixed to their lower ends, and the axles of the first and second wheels are held movably with respect to the fixing members via springs. , The wire guide member can move in the vertical direction together with the axle of the first wheel. As for the axles of the first and second wheels, in the case of fixed wheels without casters, the axles are directly held by the fixing members fixed to the lower ends of the legs, but in the case of casters with swivel members. The axle is held by the swivel member and indirectly held by the fixing member. It is intended to include both.

Preferably, the first and second wheels include a swivel member that is rotatably held relative to the fixing member, and the wire guide member is movably held relative to the swivel member in the vertical direction.

Preferably, the first and second wheels include a swivel member that is rotatably held relative to the fixing member, and the wire guide member is held movably and vertically relative to the swivel member and is an outer tube. Is rotatably connected to the swivel member at both ends.

Preferably, the body frame comprises a widthwise connecting member that connects the pair of legs, the connecting wire extends along the widthwise connecting member, and the connecting wire is the first connected to the first brake member. It includes a wire region, a second wire region connected to the second brake member, and a relay member located along the widthwise connecting member and connecting the first wire region and the second wire region.

Preferably, the connecting wire comprises an outer tube and an inner wire slidable within the outer tube, the upper end of the outer tube in the first wire region being rotatably connected to the relay member and the second wire region. The upper end of the outer tube is rotatably connected to the relay member.

Preferably, the first brake member includes an operating unit for foot operation.

According to the present invention having the above configuration, it is possible to provide a wheelbarrow having good responsiveness to the brake operation of the left and right simultaneous brakes.

The effects of the preferred embodiments will be described in detail in the following items with reference to the drawings.

It is a perspective view which shows the baby carriage which concerns on this embodiment. It is a perspective view which looked at the baby carriage which concerns on this embodiment from the back side. It is an exploded perspective view of the 1st brake member in this embodiment. It is a figure which shows the wire guide member in this embodiment, (a) is a front view, and (b) is a sectional view. In the present embodiment, it is a cross-sectional view showing the first wheel in a runnable state, (a) is a view showing a normal state, and (b) is a body frame sunk downward with respect to the first wheel. It is a figure which shows the state. In the present embodiment, it is a cross-sectional view showing a first wheel in a braking state, (a) is a view showing a normal state, and (b) is a state in which the vehicle body frame is sunk downward with respect to the first wheel. It is a figure which shows. In the present embodiment, it is a cross-sectional view showing a second wheel in a runnable state, (a) is a view showing a normal state, and (b) is a body frame sunk downward with respect to the second wheel. It is a figure which shows the state. In the present embodiment, it is a cross-sectional view showing a second wheel in a braking state, (a) is a view showing a normal state, and (b) is a state in which the vehicle body frame is sunk downward with respect to the second wheel. It is a figure which shows. It is a figure which shows the relay member in the runnable state in this embodiment. It is a figure which shows the relay member in the brake state in this embodiment.

Embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are designated by the same reference numerals, and the description thereof will not be repeated.

<About the outline structure of the baby carriage>
First, the schematic structure of the baby carriage 1 as a wheelbarrow according to the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 2 schematically shows the baby carriage 1 as viewed from the back side (direction of arrow II in FIG. 1). FIG. 3 shows an exploded perspective view of the first brake member. The baby carriage 1 is a so-called double-sided type, and can be switched between a back push state and a face-to-face push state. FIG. 1 shows the baby carriage 1 in the back-pushed state.

With particular reference to FIG. 1, the baby carriage 1 includes a main body frame portion 10, first and second wheels 20, 30 and a pair of push rods 16. The main body frame portion 10 connects a pair of front legs 11, a pair of rear legs 12, a pair of seat support members 13, a widthwise connecting member 14 that connects the pair of front legs 11, and a pair of rear legs 12. Includes a widthwise connecting member 15.

The pair of front legs 11 are a pair of legs arranged apart from each other in the width direction. The pair of hind legs 12 is also a pair of legs arranged apart from each other in the width direction. The pair of legs includes a fixing member 19 fixed to their lower ends. The legs and the fixing member 19 have a hollow shape. The width direction connecting member 15 is also hollow. The "width direction" is synonymous with the left-right direction and represents a direction orthogonal to the traveling direction. The left-right direction corresponds to the left-right direction seen from the rear of the baby carriage (Fig. 2).

With particular reference to FIG. 2, the first wheel 20 is a caster rotatably attached to the lower ends of the front leg 11 and the rear leg 12 located on the right side in the width direction. The second wheel 30 is also a caster rotatably attached to the lower ends of the front leg 11 and the rear leg 12 located on the left side in the width direction. That is, the two first wheels 20 and the two second wheels 30 are arranged side by side in the width direction at the front position in the traveling direction and the rear position in the traveling direction in the rearward pushed state.

With particular reference to FIG. 3, in the present embodiment, the first wheel 20 and the second wheel 30 include a swivel member 24 that is swivelly held relative to the fixing member 19. The swivel member 24 is attached to the rear leg 12 of the baby carriage 1 via the fixing member 19 of the rear leg 12. The swivel member 24 has an insertion hole 25 that penetrates in the vertical direction. As shown in FIG. 3, the swivel member 24 and the fixing member 19 can rotate relative to each other by inserting the caster shaft 19a of the fixing member 19 extending along the swivel axis La into the insertion hole 25 of the swivel member 24. It is connected. The swivel member 24 rotatably supports the pair of first wheels 20 via the axle 59.

The first wheel 20 has a tire portion 21, a wheel portion 22 that holds the inner circumference of the tire portion 21, and a plurality of ribs 23 that are fixed to the wheel portion 22. In the present embodiment, the rib 23 is fixed to the side of the wheel portion 22 facing the turning member 24. The ribs 23 extend radially around the axle 59, and for example, five ribs 23 are provided. The rib 23 is inclined so that the tip is tapered. When the pair of protrusions 46 of the first brake member 40, which will be described later, are located between the adjacent ribs 23, the rotation of the first wheel 20 is prohibited. The second wheel 30 is the same as the first wheel 20.

With particular reference to FIG. 1, the pair of push rods 16 extend in the vertical direction and are attached to the main body frame portion 10 via the pivot shaft 17. The upper ends of the pair of push rods 16 are connected to each other by a handle portion 18. The push rod 16 can rotate in the front-rear direction about the pivot 17, and can be switched between a back push position shown in FIG. 1 and a face-to-face push position (not shown).

The baby carriage 1 according to the present embodiment has left and right simultaneous brakes capable of stopping both wheels 20 and 30 arranged side by side by operating the first brake member 40 provided on the first wheel 20. Has. The brake mechanism of such a baby carriage 1 will be described in detail below.

<About the brake mechanism>
The brake mechanism of the baby carriage 1 will be described with reference to FIGS. 4 to 9. FIGS. 5, 7 and 9 are diagrams showing a runnable state, and FIGS. 6, 8 and 10 are diagrams showing a braking state. The baby carriage 1 includes a first brake member 40, a second brake member 80, a first wire guide member 60, a second wire guide member 100, and a connecting wire 70 as a brake mechanism.

With particular reference to FIGS. 3, 5 and 6, the first brake member 40 is provided to stop the rotation of the first wheel 20 and engages with the first wheel 20 to stop the rotation of the wheel. It is displaced between the position (FIG. 6) and the non-engaged position (FIG. 5) that does not engage the first wheel 20. The first brake member 40 includes an operating member 41 and a mounting member 51 to which the operating member 41 is rotatably attached.

The operation member 41 is directed from the operation main body 42, the operation unit 43 for operating by hand or foot, the pin hole 44 provided in the operation main body 42, and the pair of first wheels 20 from the operation main body 42. It has a pair of protruding portions 46, each of which protrudes. The operation main body 42 is provided with a convex portion 45. The operation main body 42 is provided with an engaging portion 47 for engaging the connecting wire 70, which will be described later.

As shown in FIG. 5, the first brake member 40 is in a runnable state in a non-engaged position in which the pair of protrusions 46 are not located between the ribs 23 of the pair of first wheels 20. As shown in FIG. 6, the first brake member 40 is in the braking state in the state of the engaging position where the pair of protrusions 46 are located between the ribs 23 of the pair of first wheels 20.

The mounting member 51 has a mounting body 52, a storage section 53 for accommodating a spring 57 described later, a pin hole 54 provided in the mounting body 52, and an axle hole 58 through which the axle 59 penetrates.

The mounting body 52 is provided with a first recess 55a and a second recess 55b. The first concave portion 55a and the second concave portion 55b selectively engage with the convex portion 45 provided on the operating member 41. When the first concave portion 55a and the convex portion 45 are engaged with each other, the pair of first wheels 20 is allowed to rotate and is in a runnable state. When the second concave portion 55b and the convex portion 45 are engaged, the pair of protrusions 46 are located between the ribs 23 of the pair of first wheels 20, so that the rotation of the pair of first wheels 20 is prohibited. , It becomes a braking state.

The storage portion 53 is provided above the axle hole 58 through which the axle 59 of the first wheel 20 penetrates. The axle 59 of the first wheel 20 is indirectly held by the spring 57 so as to be movable in the vertical direction with respect to the fixing member 19. As a result, the spring 57 housed in the storage portion 53 stably supports the load and absorbs vibrations and shocks during traveling. The spring 57 is typically a spring spring, but various members can be used.

The pin 56 penetrates through the pin hole 54 of the mounting body 52 and the pin hole 44 of the operating member 41. As a result, the operation main body 42 is rotatably attached to the mounting main body 52 via the pin 56, and is provided so as to rotate around the pin 56 by operating the operation main body 43.

Next, with reference to FIG. 4, the first wire guide member 60 attached to the axle 59 of the first wheel 20 will be described.

The first wire guide member 60 is a member that guides the connecting wire 70 pulled out from the rear leg 12 to the first brake member 40 along the arcuate guide surface 62. The arc-shaped guide surface 62 is, for example, a rail formed below the guide member main body 61, and is a portion along which the first inner wire 73, which will be described later, follows. At the end of the arcuate guide surface 62, a storage space 63 for accommodating the end of the first outer tube 72 of the connecting wire 70, which will be described later, is provided.

The first wire guide member 60 has an axle hole 65 through which the axle 59 of the first wheel 20 penetrates. As described above, the first wire guide member 60 is attached to the axle 59 of the first wheel 20. The axle 59 penetrates the axle hole 65 of the first wire guide member 60, the axle hole 58 of the mounting member 51, and the elongated hole 24a of the swivel member 24. As a result, the first wire guide member 60 is held so as to be movable in the vertical direction with respect to the swivel member 24. Further, the first wire guide member 60 can move in the vertical direction together with the axle 59 of the first wheel 20.

A protrusion 64 that projects upward is formed above the axle hole 65 of the first wire guide member 60. The spring 57 described above is arranged so that the upper and lower ends are sandwiched between the protruding portion 64 of the first wire guide member 60 and the swivel member 24.

By guiding the first inner wire 73, which will be described later, with the arcuate guide surface 62 of the first wire guide member 60, the first inner wire 73 can be held in an appropriately pulled state. Further, as shown in FIGS. 5 (b) and 6 (b), when the traveling road surface is uneven or a heavy infant is riding on the baby carriage, even if the suspension function is exhibited, the first Since the inner wire 73 is guided by the arc-shaped guide surface 62 in an appropriate tension state, there is no possibility that the first inner wire 73 will sag, and the responsiveness of the left and right simultaneous braking is good.

The second brake member 80 will be described with reference to FIGS. 2, 7, and 8. Since the second brake member 80 is connected to the first brake member 40 by the connecting wire 70, the displacement of the second brake member 80 is interlocked with the first brake member 40.

The second brake member 80 is provided to stop the rotation of the second wheel 30, and does not engage with the wheel at the engaging position (FIG. 8) that engages with the second wheel 30 and stops the rotation of the wheel. Displace between the non-engaged position (FIG. 7). The second brake member 80 includes a rotating member 81 and a connecting member 91 to which the rotating member 81 is rotatably attached.

As shown in FIG. 2, the rotating member 81 includes a rotating main body 82 that rotates around a pin 87 and a pair of engaging members 85 provided on the side of a pair of second wheels 30 with the rotating main body 82 interposed therebetween. have. As shown in FIGS. 7 and 8, the rotating member 81 includes a pin hole 84 through which the pin 87 penetrates and an engaging hole 83 into which one end of the second inner wire 76 of the connecting wire 70 is inserted, which will be described later. The rotating main body 82 and the engaging member 85 rotate around the pin 87 in conjunction with the movement of the operating member 41 of the first brake member 40.

A return spring 86 is arranged between the rotating member 81 and the connecting member 91. The rotating member 81 is urged by the return spring 86 in a direction away from the connecting member 91. That is, the return spring 86 is urged to bring the engaging member 85, which moves in conjunction with the rotating member 81, to the non-engaging position.

As shown in FIG. 2, the engaging member 85 has a through hole 88 through which the pin 87 penetrates and a protrusion 89 protruding toward the second wheel 30. The engaging member 85 moves in conjunction with the operation of the rotating main body 82. As shown in FIG. 7, the second brake member 80 is in a runnable state in a non-engaged position in which the pair of protrusions 89 are not located between the ribs 33 of the pair of second wheels 30. As shown in FIG. 8, the second brake member 80 is in the braking state when the pair of protrusions 89 are located between the ribs 33 of the pair of second wheels 30.

The connecting member 91 has a mounting body portion 92, a storage portion 93 for accommodating the spring 94, and an axle hole (not shown) through which the axle 95 penetrates. As shown in FIG. 2, the mounting body portion 92 is located at the boundary between the rotating member 81 and the pair of engaging members 85. As shown in FIGS. 7 and 8, the storage portion 93 is provided above the axle hole (not shown) through which the axle 95 of the second wheel 30 penetrates. The axle 95 of the second wheel 30 is held so as to be movable in the vertical direction with respect to the fixing member 19 via the spring 94. As a result, the spring 94 housed in the storage unit 93 absorbs vibration due to unevenness of the road surface or the like.

Similar to the first wire guide member 60 provided on the axle 59 of the first wheel 20, the second wire guide member 100 has the connecting wire 70 drawn from the rear leg 12 along the arcuate guide surface 102. It is a member that leads to the brake member 80. The arc-shaped guide surface 102 is, for example, a rail located below the guide member main body 101, and is a portion along which the second inner wire 76, which will be described later, follows. At the end of the arcuate guide surface 102, a storage space 103 for accommodating the end of the second outer tube 75 of the connecting wire 70, which will be described later, is provided.

The second wire guide member 100 has an axle hole 105 through which the axle 95 of the second wheel 30 penetrates. The second wire guide member 100 is attached to the axle 95 of the second wheel 30. The axle 95 penetrates the through hole 105 of the second wire guide member 100, the through hole (not shown) of the connecting member 91, and the elongated hole 24a of the swivel member 24. As a result, the second wire guide member 100 is held so as to be movable in the vertical direction with respect to the swivel member 24. Further, the second wire guide member 100 can move in the vertical direction together with the axle 95 of the second wheel 30.

A protruding portion 104 projecting upward is formed above the axle hole 105 of the second wire guide member 100. The spring 94 described above is arranged so as to be sandwiched between the protrusion 104 and the swivel member 24.

By guiding the second inner wire 76 with the arcuate guide surface 102 of the second wire guide member 100, the second inner wire 76 can be held in an appropriately pulled state. Further, as shown in FIGS. 7 (b) and 8 (b), even if the suspension function is exhibited when the traveling road surface is uneven or when a heavy infant is riding in the baby carriage, the second inner Since the wire 76 is guided by the arc-shaped guide surface 102 in an appropriate tension state, there is no possibility that the second inner wire 76 will sag, and the responsiveness of the left and right simultaneous braking is good.

Next, the connecting wire 70 that connects the first brake member 40 and the second brake member 80 will be described.

The connecting wire 70 is a member that connects the first brake member 40 and the second brake member 80 so that both brake members 40 and 80 interlock to perform a braking operation. As shown in FIG. 2, the connecting wire 70 is housed inside the fixing member 19, the lower end position of the rear leg 12, and the width direction connecting member 15.

The connecting wire 70 is located along the first wire region 71 connected to the first brake member 40, the second wire region 74 connected to the second brake member 80, and the widthwise connecting member 15, and is the first. It includes a relay member 110 that connects the wire region 71 and the second wire region 74.

With reference to FIGS. 3, 5 and 9, the first wire region 71 is provided on the side of the first outer tube 72 and the first brake member 40, and is a first inner wire that is slidable in the first outer tube 72. 73 and is provided. The first outer tube 72 is typically a tubular member that extends in a long shape, and secures a path through which the first inner wire 73 passes. By guiding the first inner wire 73 by the first outer tube 72, a path through which the first inner wire 73 passes is secured.

The first outer tube 72 extends from the first brake member 40 to the relay member 110, and fixing portions 72a and 72b are provided at the tips thereof, respectively. As shown in FIG. 5, the fixing portion 72a located on the first brake member 40 side is rotatably connected to the storage space 63 of the first wire guide member 60 located on the turning axis La. The first wire guide member 60 is a member that swivels with respect to the fixing member 19, but by providing the fixing portion 72a rotatably on the swivel axis La, the first outer tube 72 can be prevented from twisting. it can. Further, as shown in FIG. 9, the fixing portion 72b located on the width direction connecting member 15 side is rotatably connected to the relay member 110 described later.

Both ends of the first inner wire 73 are exposed from the fixing portions 72a and 72b of the first outer tube 72, respectively, and are connected to the first brake member 40 and the relay member 110. Specifically, the first inner wire 73 is provided with spheres 73a and 73b at the tips thereof, respectively. The sphere 73a located on the first brake member 40 side is rotatably fixed to the engaging portion 47 of the operating member 41. As shown in FIG. 9, the sphere 73b located on the width direction connecting member 15 side is rotatably engaged with the moving member 115 of the relay member 110 described later. By fixing the spheres 73a and 73b rotatably, even if the first inner wire 73 is twisted, the twist can be released. The first inner wire 73 is along the arcuate guide surface 62 of the first wire guide member 60.

With reference to FIGS. 7, 8 and 10, the second wire region 74 is provided on the second outer tube 75 and the second brake member 80 side, and the second inner wire slidable in the second outer tube 75. It is equipped with 76. The second outer tube 75 is typically a tubular member that extends in a long shape, and secures a path through which the second inner wire 76 passes. By guiding the second inner wire 76 by the second outer tube 75, a path through which the second inner wire 76 passes is secured.

The second outer tube 75 extends from the second brake member 80 to the relay member 110, and fixing portions 75a and 75b are provided at the tips thereof, respectively. As shown in FIG. 7, the fixing portion 75a located on the second brake member 80 side is rotatably connected to the storage space 103 of the second wire guide member 100 located on the turning axis La. The second wire guide member 100 is a member that swivels with respect to the fixing member 19, but by providing the fixing portion 75a rotatably on the swivel axis La, the second outer tube 75 can be prevented from twisting. it can. Further, as shown in FIG. 9, the fixing portion 75b located on the width direction connecting member 15 side is rotatably connected to the relay member 110 described later.

Both ends of the second inner wire 76 are exposed from the fixing portions 75a and 75b of the second outer tube 75 and are connected to the second brake member 80 and the relay member 110. Specifically, the second inner wire 76 is provided with spheres 76a and 76b at the tips thereof, respectively. The sphere 76a located on the second brake member 80 side is fixed to the engaging hole 83 of the rotating member 81. As shown in FIG. 10, the sphere 76b located on the width direction connecting member 15 side is engaged with the moving member 115 of the relay member 110 described later. By fixing the spheres 76a and 76b rotatably, even if the second inner wire 76 is twisted, the twist can be released. The second inner wire 76 is along the arcuate guide surface 102 of the second wire guide member 100.

With reference to FIGS. 9 and 10, the relay member 110 includes a guide member 111 and a moving member 115 that slidably moves in the guide member 111. In the guide member 111, a first positioning portion 112 that determines the position of the fixing portion 72b of the first outer tube 72 and a second positioning portion 113 that determines the position of the fixing portion 75b of the second outer tube 75 are formed. ..

Further, the guide member 111 has a convex portion 114 inside the guide member 111 that limits the movement of the moving member 115. The moving member 115 is provided so that its left-right direction is sandwiched between the first and second positioning portions 112 and 113. At both ends of the moving member 115, storage portions 115a for accommodating the sphere 73b of the first inner wire 73 are provided, and storage portions 115b for accommodating the fixing portion 76b of the second inner wire 76 are provided.

<About the operation of the brake mechanism>
When the operation member 41 is operated, the first brake member 40 is displaced from the state shown in FIG. 5 to the state shown in FIG. 6, and the protrusion 46 of the operation member 41 moves between the ribs 23 of the first wheel 20. It will be in a braking state. At the same time, the first inner wire 73 is pulled out from the fixing portion 72a of the first outer tube 72, and the relay member 110 is displaced from the state shown in FIG. 9 to the state shown in FIG. That is, when the moving member 115 of the relay member 110 moves to the right side (the fixed portion 72b side of the first outer tube 72), the second inner wire 76 fixed to the moving member 115 also slides to the right side and moves to the right side. The 1 inner wire 73 is pulled into the fixing portion 72b of the first outer tube 72, and the second inner wire 76 is pulled out from the fixing portion 75b of the second outer tube 75.

As a result, the second inner wire 76 is pulled in from the fixed portion 75a of the second outer tube 75, and the rotating member 81 rotates around the pin 87. With the displacement of the second inner wire 76, the second brake member 80 is displaced from the state shown in FIG. 7 to the state shown in FIG. 8 by the rotating member 81, and the protrusion 89 of the engaging member 85 is the second wheel. It moves between the ribs 33 of 30 and becomes a braking state.

When the operating member 41 is operated to return from the state shown in FIG. 6 to the state shown in FIG. 5, the protrusion 46 of the first brake member 40 is separated from the ribs 23 of the first wheel 20 and is in a runnable state. At the same time, the first inner wire 73 is pulled back into the fixing portion 72a of the first outer tube 72, and the relay member 110 is displaced from the state shown in FIG. 10 to the state shown in FIG. The moving member 115 of the relay member 110 moves to the left side (the fixing portion 75b side of the second outer tube 75), the fixing portion 76b fixed to the moving member 115 also slides to the left side, and the first inner wire 73 moves. It is pulled out from the fixing portion 72b of the first outer tube 72, and the second inner wire 76 is pulled in from the fixing portion 75b of the second outer tube 75.

As a result, the second inner wire 76 is pulled out from the fixed portion 75a of the second outer tube 75, and the rotating member 81 rotates around the pin 87. As a result, with the displacement of the second inner wire 76, the second brake member 80 is displaced from the state shown in FIG. 8 to the state shown in FIG. 7, and the protruding portion 89 of the engaging member 85 is displaced. It is separated from the ribs 33 of the second wheel 30 and is in a runnable state. By operating the operating member 41 in this way, both the pair of left and right wheels 20 and 30 can be put into a braking state.

In the present embodiment, the operation unit 43 of the operation member 41 is provided between the first wheels 20, but the position of the operation unit 43 is not limited. The operation unit 43 may be provided on the handle unit 18, and in this case, the operation unit 43 and the brake members 40, 80 may be connected by a connecting member such as a wire.

Further, in the present embodiment, the brake mechanism is provided on the rear leg 12, but may be provided on the front leg 11 side instead of the rear leg 12, or may be provided on either the rear leg 12 or the front leg 11. It may be provided.

Further, in the present embodiment, the first and second brake members 40 and 80 are provided with the first and second wire guide members 60 and 100, respectively. However, the wire guide member may be provided on at least one brake member.

Further, the wheelbarrow according to the present embodiment has been described as the baby carriage 1, but the present invention is not limited to this, and a childcare device such as a high-low bed, a silver cart, a shopping cart, or the like may be used.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and it is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 baby wheel, 10 body frame, 11 front legs, 12 rear legs, 13 seat support members, 14, 15 width direction connecting members, 16 push rods, 17 pivots, 18 handles, 19 fixing members, 19a caster shafts, 20 first Wheels, 21 tires, 22 wheels, 23 ribs, 24 swivel members, 24a long holes, 25 insertion holes, 30 second wheels, 40 first brake members, 41 operation members, 42 operation body units, 43 operation units, 44 Pin hole, 45 convex part, 46 protrusion part, 47 engaging part, 51 mounting member, 52 mounting body part, 53 storage part, 54 pin hole, 55a 1st concave part, 55b 2nd concave part, 57 spring, 58 axle hole, 59 Axle, 60 1st wire guide member, 61 Guide member body, 62 Arc-shaped guide surface, 63 Storage space, 64 Projection, 65 Axle hole, 70 Connecting wire, 71 1st wire area, 72 1st outer tube, 72a , 72b fixed part, 73 1st inner wire, 73a, 73b fixed part, 74 2nd wire area, 75 2nd outer tube, 75a, 75b fixed part, 76 2nd inner wire, 76a, 76b sphere, 80 2nd brake Member, 81 Rotating member, 82 Rotating body, 83 Engagement hole, 84 Pin hole, 85 Engagement member, 86 Return spring, 88, 105 Through hole, 89 Protrusion, 91 Connecting member, 92 Mounting body, 93 Storage Part, 94 spring, 95 axle hole, 100 second wire guide member, 101 guide member body, 102 arcuate guide surface, 103 storage space, 104 protrusion, 105 axle hole, 110 relay member, 111 guide member, 112, 113 2nd positioning part, 112 1st positioning part, 114 convex part, 115 moving member, 115a, 115b storage part.

Claims (8)

A body frame that includes a pair of legs that are spaced apart from each other in the width direction,
The first and second wheels rotatably attached to the lower ends of the pair of legs,
An engaging position provided to stop the rotation of the first wheel and engaging with the first wheel to stop the rotation of the first wheel, and a non-engaging position not engaging with the first wheel. The first brake member that shifts between and
An engaging position provided to stop the rotation of the second wheel and engaging with the second wheel to stop the rotation of the second wheel, and a non-engaging position not engaging with the second wheel. The second brake member that displaces between
A connecting wire that connects the first brake member and the second brake member so that both brake members interlock to perform a braking operation.
A wheelbarrow including a wire guide member attached to the axle of the first wheel and guiding the connecting wire drawn from one of the legs to the first brake member along an arcuate guide surface. The connecting wire includes an outer tube and an inner wire slidable in the outer tube.
Both ends of the inner wire are exposed from the outer tube and connected to the first and second brake members.
The wheelbarrow according to claim 1, wherein the inner wire is along an arcuate guide surface of the wire guide member. The pair of legs includes fixing members fixed to their lower ends.
The axles of the first and second wheels are held so as to be movable in the vertical direction with respect to the fixing member via a spring.
The wheelbarrow according to claim 2 , wherein the wire guide member can move in the vertical direction together with the axle of the first wheel. The first and second wheels include a swivel member that is swivelly held relative to the fixing member.
The wheelbarrow according to claim 3, wherein the wire guide member is held so as to be movable in the vertical direction with respect to the swivel member. The first and second wheels include a swivel member that is swivelly held relative to the fixing member.
The wire guide member is held so as to be movable in the vertical direction with respect to the swivel member.
The wheelbarrow according to claim 3 , wherein both ends of the outer tube are rotatably connected to the swivel member. The main body frame includes a widthwise connecting member that connects the pair of legs.
The connecting wire extends along the widthwise connecting member and
The connecting wire is located along the widthwise connecting member, the first wire region connected to the first brake member, the second wire region connected to the second brake member, and the first wire. The wheelbarrow according to claim 1 , further comprising a relay member connecting the region and the second wire region. The connecting wire includes an outer tube and an inner wire slidable in the outer tube.
The upper end of the outer tube of the first wire region is rotatably connected to the relay member.
The wheelbarrow according to claim 6, wherein the upper end of the outer tube in the second wire region is rotatably connected to the relay member. The wheelbarrow according to any one of claims 1 to 7, wherein the first brake member includes an operation unit for being operated by a foot.

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