JP2722966B2 - Casters with constantly restricted wheel rotation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a wheel, which is mounted on a lower end of a chair or the like without inadvertently rotating due to a recoil that occurs when a person sitting on the floor stands up. The present invention relates to a caster in which rotation of a wheel is constantly controlled so that a chair or the like moves from an original position and a problem involving danger can be solved.

[0002]

2. Description of the Related Art Conventionally, a single wheel caster or a twin wheel caster is usually attached to the lower end of a chair.

[0003] In these casters, the wheels are generally simply rotatably supported by wheel mounting members.

[0004]

When such a caster is attached to the lower end of a chair, the chair can be easily moved to a desired place. Due to the recoil that occurs when you go up, the wheels rotate carelessly, the chair moves from its original position, and when you try to sit down again, it may fall over, which is a danger problem. ing.

[0005] Based on such an indication, it is conceivable to attach the wheel to the support portion of the wheel attaching member in a stronger fitting relationship. However, in this case, automation of the assembling may not be adjusted or the assembling may be troublesome. In addition to this, the occurrence of defective products or the damage of each part, particularly the support part of the wheel mounting member and the mounting part of the wheel, is a new problem.

[0006] In view of such a conventional problem, a caster according to the present invention in which the rotation of the wheels is constantly controlled is provided. It is an object of the present invention to prevent the wheels from rotating carelessly due to a recoil that occurs when the user stands up, move the chair or the like from the original position, and avoid danger.

[0007]

According to the first aspect of the present invention, a wheel is rotatably supported.
The outer circumference of the support shaft of the wheel in the wheel mounting member
With a pair of squeezing pieces that press against
To control the rotation of the wheels at all times.
A wheel whose rotation is always regulated.
Star made up. Further, in claim 2, from both ends of the connecting pins erected on both sides from the wheel mounting member, the support shaft of the wheel is
A caster that is inserted in the axial direction and rotatably supported by a support tool. As a regulating means, a leaf spring is bent so that two pairs of clamping pieces are set up on both sides of the connecting piece. Using the pinching tool provided, place the pinching tool, which is a regulating means, below the support shaft of the wheel, and forcibly press the outer circumference of the tip end of the pair of wheel support shafts from the side. Thus, it has been exemplified that the rotation of the wheel is always restricted by the restricting means. Further, in the third aspect, the pressing piece as the restricting means has been exemplified to be curved in an arc shape to the opposite side.

[0008]

As described above, the rotation of the wheel according to the first aspect is constantly performed.
According to the time-regulated castors, the wheel is located around its support shaft
In addition, two pairs of pressing pieces as pressing means
Forced pressure contact causes wheel rotation between them
It is always regulated by the regulating force caused by the frictional force.

According to the second aspect of the present invention, the pair of squeezing pieces of the pair of squeezing tools serving as regulating means are forcibly provided on the outer circumference of the support shaft of the pair of wheels. The pair of wheels are constantly pressed against each other, and the rotation of the pair of wheels is constantly regulated by the regulating force caused by the frictional force generated between them. The pair of wheels do not rotate carelessly due to the recoil that occurs when the vehicle is raised, and the chair or the like does not move from the original position. Further, when the chair or the like is to be moved, the chair or the like is pushed to generate a gap between the outer circumference of the support shaft of the pair of wheels and the two pairs of pressing pieces of the pressing tool serving as the regulating means. A force larger than the regulating force caused by the frictional force is applied, and the pair of wheels is rotated against the regulating force by the pressing device serving as the regulating means.

According to the third aspect of the present invention, the arc-shaped curved sides of the two pairs of the pressing pieces are forcibly pressed against each other.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the caster according to the present invention in which the rotation of the wheels is constantly restricted will be described with reference to the accompanying drawings.

In the illustrated embodiment, such a caster is illustrated as a two-wheel caster in which a pair of wheels are independently rotatably arranged on both sides of a wheel mounting member. However, although the casters are not shown, it is also possible to adopt a single wheel caster in which only one wheel is rotatably arranged on the wheel mounting member.

First, FIGS. 1 to 5 show a first embodiment of a caster according to the present invention. In the figure, 1 is a wheel mounting member formed of a synthetic resin body, and 2 and 2 are a pair of wheels formed of the same synthetic resin body which are independently rotatably disposed on both sides thereof. Also, wheel mounting member 1
A pair of wheels 2, 2 above a partition wall 3 constituting the main body.
A cover 4 that covers the upper half of the cover 4 is integrally formed.
In the figure, reference numeral 5 indicates that this is attached to the wheel attachment member 1,
A supporter for rotatably supporting the pair of wheels 2, 2, and similarly, a reference numeral 6 in the figure is a pressing device serving as a regulating means 7 for constantly restricting the rotation of the pair of wheels 2, 2. A pair of outer casings 8, 8 for projecting a tip end side of a pair of wheels 2, which will be described later, are provided on both sides of the partition wall 3 of the wheel mounting member 1.
As shown in FIG. 3, the pair of outer cylinders 8, 8 are respectively inserted into the pair of outer cylinders 8, 8, and a pair of support pieces of the support 5, which will be described later, and a clamping tool 6, which serves as the regulating means 7, are described below. A pair of insertion openings 9, 9 through which two pairs of pressure pieces are inserted, and a pair of insertion openings 9 below the partition wall 3 and the pair of outer casings 8, 8. 9, a connecting piece of the support tool 5, which communicates with the support 9, and a pressing tool 6 serving as the regulating means 7.
An interior step 1 for superimposing a connecting piece, which will be described later,
0 is recessed. In the drawing, reference numeral 11 denotes a bottomed storage cylinder which is opened upward from one side of the partition wall 3 so as to protrude upward through the cover 4. Reference numeral 12 denotes the storage cylinder 11
2 shows a mounting shaft in which a lower half is inserted and an upper half is projected upward from the lower half so as to be rotatable. On the other hand, the wheels 2, 2 are provided with a support shaft 15 having an annular concave groove 14 provided on the outer periphery of the distal end side at the axis of the disc-shaped main body 13. An annular ridge 16 on the outer circumference
Is protruding. In the drawing, reference numeral 17 denotes a support shaft 1 for wheels 2 and 2.
5 is an insertion opening for inserting an end of a connection pin having a bottom and opened at the front end side thereof, which will be described later. As shown in FIG. 4, the support member 5 is formed by bending a metal plate so that a pair of support pieces 19, 19 are erected on both sides of a connecting piece 18, and a pair of support pieces 19, 19 are provided. The annular groove 14 in the outer periphery of the support shaft 15 of the wheels 2, 2
Engaging recesses 21 and 21 are provided in which the annular groove 14 that forms the engaging edge 20 that engages with a portion located on the upper half side engages. In the figure, reference numerals 22... Denote locking projections protruding toward the connecting pieces 18 on both sides of the supporting pieces 19, 19, which are provided on both inner side surfaces of the outer casings 8, 8 of the wheel mounting member 1. The support 5 is locked to the notches 23.
Attached to Further, the pressing tool 6 serving as the regulating means 7 is
As shown in FIGS. 1 and 2, the support shafts 15 of the pair of wheels 2 and 2
The pair of pressing pieces 24... Are forcibly pressed against opposing portions on the distal end side of the 15 annular concave grooves 14, causing rotation of the pair of wheels 2, 2 due to frictional force generated therebetween. They are always trying to regulate with regulatory power. As shown in FIG. 5, the presser 6 serving as the restricting means 7 is formed by bending a leaf spring and forming two pairs of pressers 24 on both sides of a connecting piece 25.
Are formed in a shape in which they are bent in the shape of an arc on the opposite side and stand upright. When the holding member 6 is mounted on the wheel mounting member 1 by using the supporting member 5, the holding members 24 are formed to have a length relationship in which the distal end side becomes a free end as shown in FIG. ing. In the drawing, reference numeral 26 denotes a connecting pin for connecting the pair of wheels 2, 2, which is inserted into a bottomed insertion opening 17 provided on the support shaft 15 of the wheel 2 and opened at the tip end, and a pair of wheels 26. It is attached between 2 and 2 in the form of a bridge.

[0014] Such a caster is assembled as follows. First, a pair of wheels 2, 2 connected by connecting pins 26 are positioned on both sides of the partition wall 3 of the wheel mounting member 1 provided with the cover 4. Thereafter, the pair of clamping pieces 24... From the lower side of the wheel mounting member 1 are inserted into the outer casing 8 from the pair of insertion openings 9, 9. Then, the connecting pieces 25 are positioned on the interior step 10. Next, a pair of support pieces 19, 19 are inserted into the outer casing 8 from the pair of insertion openings 9, 9, respectively, from the lower side of the support tool 5, and the engagement recesses 2 are formed.
1 has an annular groove 14 on the outer periphery of the support shaft 15 of the wheel 2
In a state in which the portion located on the upper half side of the annular concave groove 14 is engaged and the connecting piece 18 is superimposed on the outside of the connecting piece 25 of the pressing tool 6 serving as the regulating means 7. It is positioned inside the interior stepped portion 10, and furthermore, the engagement projections 22 are engaged with the engagement recesses 23 provided on both inner side surfaces of the exterior cylinders 8, 8 and attached. At this time, the clamping device 6 serving as the regulating means 7
Is a support shaft 1 for a pair of wheels 2, 2 as shown in FIGS.
The arc-shaped curved sides of the pair of pressing pieces 24, 24 are forcibly pressed against opposing portions on the tip side of the annular concave grooves 14, 14.

In the caster shown in FIGS. 1 to 5, a pair of wheels 2, 2 is provided with two pairs of pressing tools 6 serving as regulating means 7 on the support shafts 15, 15 respectively. Of the pair of wheels 2, 2 are forcibly pressed into contact with each other, and the rotation of the pair of wheels 2, 2 is constantly regulated by the regulating force caused by the frictional force generated between them. From
When mounted on the lower end of a chair or the like, the reaction that occurs when a seated person stands up does not cause the pair of wheels 2 and 2 to rotate carelessly, and from the position where the chair was originally located They do not move. When the chair or the like is to be moved, the chair or the like is pushed so that the pair of wheels 2, 2
A larger force than the frictional force generated between the two pairs of the pressing pieces 24... Of the pressing tools 6 serving as the restricting means 7 and the outer circumference of the support shafts 15, 15 is applied to restrict the force. The pair of wheels 2 and 2 are rotated against the restricting force of the clamping device 6 serving as the means 7. At this time, the support shaft 1 of the pair of wheels 2 and 2
In contrast to 5 and 15, two pairs of the pressing pieces 24... Serving as the restricting means 7 serving as the regulating means 7 have a shape in which the tip side is a free end and a side in which the side curved in an arc is directed. The synergistic effect of
It becomes possible to rotate the pair of wheels 2 and 2 with a small load of the force for restricting the rotation of the pair of wheels 2 and 2.

In the first embodiment shown in FIGS.
The support tool 5 and the pressure tool 6 serving as the regulating means 7 can also be formed from a synthetic resin body. Also, the connecting piece 1 of the support member 5 can be used without separating the support member 5 and the pressing member 6 serving as the regulating means 7 into separate bodies.
It is also possible to erect the pressing pieces 24... From the edge where the supporting pieces 19, 19 of FIG. 8 are not erect.

Further, when the distal ends of the pressing pieces 24 of the pressing tool 6 serving as the restricting means 7 are formed in such a length relationship that they contact the inner surfaces of the outer casings 8, 8 of the wheel mounting member 1, the pair of wheels 2. , 2
The regulating force resulting from the frictional force with respect to is increased, which is particularly suitable for mounting on a heavy chair or the like.

Regardless of the illustrated embodiment, the wheel mounting member 1 may be of various forms, such as a metal plate formed by bending a metal plate.

[0019]

According to the casters of the first and second aspects of the present invention in which the rotation of the wheels is constantly regulated, for example, a pair of wheels are provided on the outer periphery of the support shaft as clamping means. The two pairs of pinching pieces are forcibly pressed into contact with each other, and the rotation of the pair of wheels is always regulated by the regulating force caused by the frictional force generated between them. When mounted on a vehicle, the recoil that occurs when a seated person stands up does not cause the pair of wheels to rotate carelessly, causing the chair or the like to move from its original position, resulting in danger. The problem can be solved. In addition, since it is only necessary to provide, for example, two pairs of clamping members for regulating the clamping members between the wheel and the wheel mounting member, it is necessary to largely change the assembling process. There is no.

According to the third aspect of the present invention, in the caster in which the rotation of the wheels is constantly regulated, the tip side of the two sets of clamping pieces serving as regulating means with respect to the support shafts of the pair of wheels is free. With the synergistic effect of the end-shaped shape and the aspect with the arc-shaped curved side facing, it is possible to rotate these with a small load of force, despite the restriction force that regulates the rotation of the pair of wheels Become.

[Brief description of the drawings]

FIG. 1 is a partially sectional side view showing a first embodiment of a caster according to the present invention.

FIG. 2 is a front view of a state in which a front wheel is also removed.

FIG. 3 is a bottom view of the wheel mounting member.

FIG. 4 is a perspective view showing a support.

FIG. 5 is a perspective view showing a pressing device serving as a regulating unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wheel mounting member 2 Wheel 3 Partition wall 4 Cover 5 Supporting device 6 Nipping tool 7 Restriction means 8 Exterior cylinder 9 Insertion opening 10 Interior step 11 Housing cylinder 12 Mounting shaft 13 Disk-shaped main body 14 Annular groove 15 Support shaft 16 Annular ridge 17 Insertion opening 18 Connecting piece 19 Supporting piece 20 Locking edge 21 Engaging recess 22 Locking projection 23 Locking recess 24 Pressing piece 25 Connecting piece 26 Connecting pin

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Kubo 1-4-1-12, Imafukuhigashi, Joto-ku, Osaka-shi Inside Ito-Kurebio Co., Ltd. (72) Takashito Jinno 1-4-1, Imafukuhigashi, Joto-ku, Osaka-shi No. 12 Inside Itoki Crebio Co., Ltd. (72) Inventor Takayuki Urano 2-5-35, Minamihonmachi, Yao-shi, Osaka (72) Inventor Shuzo Katayama 1-10-34, Chuo, Joto-ku, Osaka-shi (72) Inventor Mimura Tatsuhiko 2-8-4-504 Sekime, Joto-ku, Osaka-shi (56) References Japanese Utility Model 1986-90601 (JP, U)

Claims (3)

(57) [Claims] A wheel mounting member for rotatably supporting a wheel.
Inside, two sets that sandwich the outer periphery of the support shaft of the wheel and forcibly press-contact
Regulating means using a squeezing tool having a pair of squeezing pieces
The feature is that the rotation of the wheel is always regulated
A caster whose rotation is always restricted. 2. A caster in which a support shaft of a wheel is inserted in the axial direction from both ends of a connecting pin erected on both sides from a wheel mounting member, and is rotatably supported by a support. As a leaf spring, a leaf spring is bent, and a clamp is used in which two pairs of clamps are provided on both sides of a connecting piece, and a clamp which is a restricting means is provided below the support shaft of the wheel. The rotation of the wheel is characterized in that the rotation of the wheel is always restricted by the restricting means by pinching the outer periphery of the end of the support shaft of the pair of wheels from the side and forcibly pressing the pair. Are always regulated casters. 3. The caster as claimed in claim 1, wherein the pressing pieces, which are the restricting means, are curved in an arc shape on opposite sides.