JPH085644Y2 - Wheel stop device for wheelchairs - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a wheel stop device for a child-care chair with wheels.

[Prior Art] In some child-care chairs for sitting infants, rotatable wheels are attached. As described above, in the child-care chair provided with the wheels, it is easy to move the chair to any place even with the infant sitting, and it is easy to move the chair back and forth. By this, infants can be naturally invited to sleep.

[Problems to be Solved by the Invention] However, while the wheelchair-supported child-care chair provides the above-described convenience in use, the chair may be self-propelled and cause unexpected danger.

Therefore, an object of the present invention is to provide a wheel stop device that can realize a stopped state of the wheels of a wheelchair-supported child-care chair as needed.

[Means for Solving the Problems] A child-care chair with wheels, which is the object of the present invention, includes a seat portion and a plurality of leg members for supporting the seat portion,
A rotatable wheel is attached to each lower end of the leg member. A wheel stop device having a configuration as described below is applied to such a wheeled child-care chair.

In the above-described wheeled child-care chair, at least one of the leg members is made of a hollow bar.

An operation knob is rotatably attached to the outer side surface of the hollow leg member via a rotation shaft. The operation knob has an eccentric disk-shaped cam having a rotating shaft as a cam shaft. The first slider, which is a follower of the cam, is attached to the upper surface of the cam so as to slide along the length of the hollow leg member in response to the rotation of the cam.

 A wire is arranged inside the hollow leg member.

One end of this wire is connected to the first slider, and the other end of the wire is connected to a second slider.

The second slider is attached to the lower end of the hollow leg member so as to be slidable along the length direction of the leg member.

The second slider is formed with an engaging portion that engages with a part of the wheel and maintains the stopped state of the wheel according to the downward sliding.

Such a second slider is biased by a spring in a direction of sliding downward.

At the position where the short diameter portion of the cam abuts the first slider, the engagement portion engages a part of the wheel. On the other hand, at the position where the long diameter part of the cam abuts the first slider, the second slider is brought to the upper position and the engaging portion separates from a part of the wheel. The long diameter portion of the cam and the first slider are provided with concave and convex portions that engage with each other in order to stably maintain the contact state between them.

Preferably, a pair of left and right hollow leg members, each of which includes the operation knob, the first slider, the wire, the second slider, and the spring as described above, are arranged, and the pair of operation knobs includes a pair of hollow members. The interlocking rods passed between the leg members are interlocked with each other.

[Operation] In this invention, the wheel can be stopped or can be rotated by rotating the operation knob. The stopped state of the wheel is achieved by the engagement portion engaging a part of the wheel when the second slider slides downward due to the bias of the spring. When the operation knob is rotated from this state, the cam formed on the operation knob acts on the first slider, and the first slider is slid upward along the leg member.
The slide of the first slider is transmitted to the second slider via the wire, and the second slider slides upward against the elasticity of the spring. By sliding the second slider upward, the engaging portion is brought into a state of not engaging with the wheel, and the wheel is made rotatable. This state is stably held by the concave and convex portions that engage with each other.

[Effects of the Invention] As described above, according to the present invention, the wheels provided in the wheelchair with a wheel can be stopped or can be rotated by a simple operation of rotating the operation knob.

Therefore, if the wheels are rotatable, the advantages inherent in the wheeled child-care chair can be utilized as they are. That is, it is easy to move the chair to any place even when the infant is seated, and by moving the chair back and forth, it is possible to naturally invite the infant to sleep.

On the other hand, if the wheels are stopped, the wheeled child-care chair is prevented from unexpectedly running on its own. Therefore, even when the infant is seated, the caregiver can safely leave the childcare chair.

The spring provided in association with the second slider is
Since the engaging portion is constantly biased so as to engage with a part of the wheel, the stopped state of the wheel can be reliably maintained. Further, even when a failure such as a wire damage occurs, the spring acts to maintain the stopped state of the wheel, and therefore, it is unlikely that the failure causes the wheel to be rotatable. For these reasons, according to the present invention,
The child-care chair with wheels can be made more safe.

When the pair of left and right hollow leg members including the operation knob, the first slider, the wire, the second slider, and the spring as described above are arranged,
Since the stopped state can be obtained, the stopped state of the wheeled child-care chair can be more reliably maintained. in this case,
When the pair of operating knobs are made to interlock with each other by the interlocking rods passed between the pair of hollow leg members, only one operating knob is operated to rotate both operating knobs at the same time. Therefore, the operation for bringing the wheels to a stopped state or the rotatable state is simplified.

[Embodiment] The drawings show a child-care chair 1 according to an embodiment of the present invention.
It is for explaining.

As shown in FIG. 1, the child-care chair 1 includes a seat portion 2 and a plurality of leg members 3 and 4 for supporting the seat portion 2. Rotatable wheels 5 and 6 are attached to the lower ends of the leg members 3 and 4, respectively.

In FIG. 1, since the child-care chair 1 is shown in a side view, the leg members 3 and 4 are shown only on the front side thereof. In reality, the leg members 3 and 4 are arranged in pairs of right and left.

In this embodiment, a wheel stop device is provided in association with the pair of leg members 3. The structure related to the leg member 3 is shown in an enlarged manner in FIGS. 2 to 5. 2 and 3 show the stopped state of the wheel 5,
4 and 5 show a rotatable state of the wheel 5.

The leg member 3 is made of a hollow rod material such as a pipe having a rectangular cross section.

An operation knob 7 is rotatably attached to the outer surface of the leg member 3. The rotary shaft of the operation knob 7 is provided by the interlocking rod 8. The interlocking rod 8 extends through the leg member 3 and is rotatable about its own central axis. The operation knob 7 is fixed to the end portion of the interlocking rod 8 as described above.

Although only one end of the interlocking rod 8 is shown in FIGS. 3 and 5, the operating knob 7 is fixed to the other end of the interlocking rod 8 in a similar manner. Therefore, these 1
The pair of operation knobs 7 are made to interlock with each other by an interlocking rod 8 passed between the pair of leg members 3.

A cam 9 is formed on the operation knob 7. In addition, the operation knob 7 has a protrusion 10 for facilitating its rotating operation.
Is formed.

A first slider 11 is attached between the leg member 3 and the operation knob 7 so as to be slidable along the length direction of the leg member 3. The first slider 11 serves as a follower of the cam 9 described above, and includes a follower portion 12 that contacts the cam 9.

Further, the first slider 11 is provided with an elongated hole 13 that allows the sliding operation while accepting a part of the interlocking rod 8 and the operation knob 7 described above.

In addition, the first slider 11 is provided with a wire attachment portion 14 that extends inside the hollow leg member 3. The leg member 3 includes
An elongated hole 15 for receiving the wire mounting portion 14 is provided while allowing the sliding operation of the first slider 11.

On the upper end of the first slider 11, a sticker 16 which is appropriately colored is attached. This sheet 16 has a first slider 11 which can be seen by comparing FIGS. 2 and 4.
Depending on the slide of, the operation knob 7 can be exposed or can be hidden by the operation knob 7.

A wire 17 is arranged inside the hollow leg member 3.
One end of the wire 17 is a wire attachment portion of the first slider 11.
Connected to 14. A second slider 18 is connected to the other end of the wire 17.

The second slider 18 is attached to the lower end portion of the leg member 3 so as to be slidable along the length direction of the leg member 3.

As shown in FIG. 2, the second slider 18 is provided with an engaging portion 19 which engages with a part of the wheel 5 and maintains the stopped state of the wheel 5 in response to the downward sliding. It Engagement part
19 is adapted to engage with any of a plurality of ribs 20 formed in this embodiment to extend radially from the center of the wheel 5.

Further, the second slider 18 is provided with an elongated hole 21 for allowing itself to slide in the vertical direction while receiving a part of the wheel 5.

The lower end of the leg member 3 is closed by the spring bearing member 22. A compression spring 23 is arranged between the spring receiving member 22 and the bottom portion of the second slider 18. This compression spring 23
Urges the second slider 18 to slide downward.

The method of using the wheel stop device described above will be described below.

In the state shown in FIGS. 2 and 3, the engagement portion 19 of the second slider 18 is engaged with the rib 20 and the stopped state of the wheel 5 is maintained. This state is provided as a result of the second slider 18 sliding downward due to the action of the compression spring 23. In order to enable this state, the first slider 11 is also slid downward.

When the operation knob 7 is operated to rotate 180 degrees from the above-described state, the states shown in FIGS. 4 and 5 are obtained. That is, by the action of the cam 9, the first slider 11 is slid upward via the follower portion 12 that comes into contact with the cam 9. In order to keep this state more stable, the follower portion 12 is provided with a small recess 24, and the cam 9 has a protrusion that fits into the recess 24.
25 may be provided.

As described above, when the first slider 11 slides upward, the movement thereof is transmitted to the second slider 18 via the wire 17. Therefore, the second slider 18
Also, against the elasticity of the compression spring 23, it slides upward, and the state in which the engaging portion 19 engages with the rib 20 is released. Therefore, the wheels 5 are in a rotatable state.

Such a rotatable state of the wheel 5 can be confirmed by the seal 16 exposed from the operation knob 7. Therefore, the seal 16 can call attention to the rotatable state of the wheel 5. It should be noted that, in addition to or in addition to the above-described coloring, appropriate characters or the like may be displayed on the sticker 16.

[Brief description of drawings]

FIG. 1 is a side view showing a wheeled child-care chair 1 to which an embodiment of the present invention is adopted. FIG. 2 is a partially cutaway side view showing the leg member 3 and the wheel 5 of the child-care chair 1 in an enlarged manner, and shows the stopped state of the wheel 5. Figure 3 shows the second
It is sectional drawing which follows the line III-III of a figure. FIG. 4 is a view corresponding to FIG. 2 and shows the rotatable state of the wheels 5. FIG. 5 is a sectional view taken along the line VV in FIG. In the figure, 1 is a child-care chair with wheels, 2 is a seat portion, and 3, 4
Is a leg member, 5 and 6 are wheels, 7 is an operation knob, 8 is an interlocking rod,
Reference numeral 9 is a cam, 11 is a first slider, 12 is a follower portion, 14 is a wire attaching portion, 17 is a wire, 18 is a second slider, 19 is an engaging portion, 20 is a rib, and 23 is a compression spring. .

Claims (2)

[Scope of utility model registration request] 1. A seat portion and a plurality of leg members for supporting the seat portion, wherein each lower end portion of the leg member includes:
A wheel stopper equipped with a rotatable wheel, provided in a wheeled child-care chair, wherein at least one of the leg members is made of a hollow rod, and an outer surface of the hollow leg member has: An operation knob is rotatably attached via a rotation shaft, and the operation knob has an eccentric disk-shaped cam having the rotation shaft as a cam shaft, and is a follower of the cam. A slider is attached to the upper surface of the cam so as to be slidable along the length direction of the hollow leg member according to the rotation of the cam, and a wire is provided inside the hollow leg member. One end of the wire is connected to the first slider, the other end of the wire is connected to a second slider, and the second slider is at the lower end of the hollow leg member. Can be slid along the length of the leg member The second slider is attached with an engaging portion that engages with a part of the wheel and maintains the stopped state of the wheel in accordance with the downward sliding of the second slider. , At the position where the short diameter portion of the cam contacts the first slider, the engagement portion engages a part of the wheel, and the long diameter of the cam At a position where the portion abuts the first slider, the second slider is brought to an upper position and the engaging portion is separated from a part of the wheel, and the long diameter portion of the cam and the first The slider of (1) is provided with a concavo-convex portion that engages with each other in order to stably maintain the contact state between them, and a wheel stop device for a wheelchair with a wheel. 2. The hollow leg members provided with the operating knob, the first slider, the wire, the second slider and the spring are arranged in a pair of left and right, and a pair of the operating knobs are provided. The interlocking rods passed between the pair of hollow leg members are interlocked with each other.
A wheel stop device for a child-care chair with wheels according to.