JPH085041Y2 - caster - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention of this application relates to an improvement of a caster to be used as a rotating wheel in a shopping cart or other transport vehicles.

[0002]

2. Description of the Related Art In a conventional caster of this type, as shown in FIG. 8, for example, a fixing member 11 and a support frame 12 are integrally attached via a bearing 13. In order to rotatably support the wheels 14 on the support frame 12, an axle 15 is inserted in the center of the wheel 14 so that the axle 1
5 Both ends are fixed to the support frame 12, respectively. And
A sleeve 16 is attached to the outer circumference of the axle 15 between the support frames 12 and is integrated with the axle 16. The sleeve 16 is fitted in a bearing 17, and wheels 14 are provided on the outer periphery of the bearing 17. The support frame 12 and the wheels 14
Collars 18 and 19 are provided between both end faces of the center of the sleeve 1
It is attached to each of the six outer circumferences. The color 1
8 and 19 are cylindrical bodies having collars 18a and 19a at one end. These collars 18 and 19 are collars 18a and 19a.
Is fitted to one end of the wheel 14 so as to rotate integrally with the wheel 14 and prevent the bearing 17 from swinging left and right.

[0003]

However, in the conventional caster having the above-described structure, the collars 18, 19 and the wheels 14 are fixed by fitting, so that the collars 18, 1 are fixed.
The coupling force between the wheel 9 and the wheel 14 is weak, and there is a problem that the collars 18 and 19 come off from the wheel 14 due to vibration or shock during use.

Further, in the conventional caster having the above structure, when the wheel 14 is molded with synthetic resin, the collar 1
There is a problem in that the molten synthetic resin enters the inside of the bearing 17 from between the inner surfaces of the collars 18a and 19a of Nos. 8 and 19 and both side portions of the bearing 17 to hinder the smooth operation of the bearing 17. Then, the caster of the invention of this application is made for the purpose of solving the problem which the said conventional caster has.

[0005]

In the caster according to claim 1 of the invention of this application, a fixed member 1 and a support frame 2 are integrally attached via a bearing 3, and a wheel 4 is freely rotatable on the support frame 2. A caster supported on the wheel 4, the axle 5 is inserted into the center of the wheel 4, both ends of the axle 5 are fixed to the support frames 2, and the sleeve 6 is attached to the outer circumference of the axle 5 between the support frames 2. The sleeve 6 and the bearing 7
The wheel 4 provided on the outer circumference of the bearing 7,
Further, collars 8 and 9 having step portions 8a and 9a are sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4.

According to a second aspect of the caster of the invention of this application, in the structure of the first aspect of the invention, the collars 8 and 9 which are sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the central portion of the wheel 4 are provided with stepped portions. 8a and 9a and the races 7a of the bearing 7 are covered with covers 8b and 9b. In the caster according to claim 3 of the invention of this application, in the structure of the invention of claim 1, the collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4 are stepped portions 8a and 9a. Also, the race 7a of the bearing 7 has fitting grooves 8c and 9c at the peripheral end thereof.

According to a fourth aspect of the caster of the invention of this application, in the structure of the first aspect of the invention, the collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4 are provided with stepped portions. 8a, 9a and the fitting portions 8d, 9 into the inner circumferential grooves 7b, 7b provided at the circumferential end of the race 7a of the bearing 7
d.

[0008]

In the caster according to claim 1 of the invention of this application, the collar 8 is formed by the step portions 8a and 9a of the collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4.
This has the effect of restricting the removal of 9 and strengthening the coupling force between the collars 8 and 9 and the wheel 4.

In addition to the function of the caster described in claim 1, the caster of the invention described in claim 2 of this application covers the collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4. The bearing 7 is formed by the portions 8b and 9b.
The outer peripheral surface of the peripheral edge of the race 7a is covered. In addition to the function of the caster according to claim 1, the caster according to claim 3 of the present application has a fitting groove 8 for the collars 8 and 9 held between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4.
The inner peripheral surface of the race 7a of the bearing 7 is covered with c and 9c.

In addition to the function of the caster according to claim 1, the caster of the invention according to claim 4 of the present application is such that the collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4 are fitted. The inner peripheral grooves 7b and 7b provided at the peripheral end of the race 7a of the bearing 7 are covered by the joint portions 8d and 9d.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a caster of the invention of this application will be described below with reference to the drawings shown as embodiments. FIG.
Shows a first embodiment of the caster of the invention of this application, in which the fixing member 1 and the support frame 2 are integrally attached via a bearing 3. In order to rotatably support the wheels 4 on the support frame 2, an axle 5 is inserted into the center of the wheel 4, and both ends of the axle 5 are fixed to the support frame 2. A sleeve 6 is attached to the outer circumference of the axle 5 between the support frames 2 to be integrated with the axle 5. The sleeve 6 is fitted in a bearing 7, and the wheel 4 is provided on the outer circumference of the bearing 7.
Further, collars 8 and 9 are sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the central portion of the wheel 4. The collars 8 and 9 are provided with step portions 8a and 9a.

As the bearing 7, a ball bearing, a needle bearing, and various other bearings can be used. Like the embodiment shown in FIGS. 1 to 3 and FIGS. 5 to 6, the bearing 7 used does not have to have sidewalls, but the inner surfaces of the collars 8 and 9 also serve as sidewalls of the bearing 7. Also, the rotation failure of the bearing 7 due to the excessive bending of the housing will not occur.

The collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4 are collars 8 and 9, respectively.
It suffices that the stepped portions 8a and 9a provided in the above are clamped, and not all the collars 8 and 9 are clamped. The sleeve 6 may have step portions 8a and 9a and cover portions 8b and 9b on the upper surface of the race 7a of the bearing 7, as in the second embodiment shown in FIG.
Further, the sleeve 6 has the step portions 8a and 9a and the race 7a of the bearing 7 as in the third embodiment shown in FIG.
It is possible to have the fitting grooves 8c and 9c at the peripheral edge. Further, the sleeve 6 has the steps 8a and 9a and the bearing 7 as in the fourth embodiment shown in FIG.
It is possible to have fitting portions 8d and 9d into the inner circumferential grooves 7b and 7b provided at the circumferential end of the race 7a. In the second embodiment, the sleeve 6 has a stepped portion 8
a, 9a and the cover 8 on the upper surface of the race 7a of the bearing 7
As long as it has b and 9b, it can have an appropriate shape like the embodiment shown in FIGS. The sleeve 6 may be made of synthetic resin, metal, or any other suitable material, but is preferably one having excellent wear resistance.

[0014]

The caster according to the first aspect of the invention of the present application is characterized in that the collars 8 and 9 are held by the step portions 8a and 9a of the collars 8 and 9 which are sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4. Withdrawal was restricted and the coupling force between the collars 8 and 9 and the wheel 4 became stronger, so due to vibration and shock during use,
Collars 8 and 9 no longer fall off wheel 4.

In addition to the effect of the caster according to claim 1, the caster according to claim 2 of the present application covers the collars 8 and 9 held between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4. The bearing 7 is formed by the portions 8b and 9b.
Since the outer peripheral surface of the peripheral edge of the race 7a is covered, the collar 8,
The molten synthetic resin did not enter the inside of the bearing 7 from between the inner surface of the bearing 9 and both sides of the bearing 7, and smooth operation of the bearing 7 was not hindered.

The caster according to claim 3 of the invention of the present application has, in addition to the effect of the caster according to claim 1, the fitting of the collars 8 and 9 sandwiched between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4. Since the inner peripheral surface of the peripheral end of the race 7a of the bearing 7 is covered with the mating grooves 8c and 9c, the molten synthetic resin does not enter the inside of the bearing 7 from between the inner surfaces of the collars 8 and 9 and both sides of the bearing 7, The smooth operation of 7 is no longer hindered.

In addition to the effect of the caster according to claim 1, the caster according to claim 4 of the invention of the present application has collars 8 and 9 held between the outer peripheral portion of the sleeve 6 and both ends of the center portion of the wheel 4. Since the inner peripheral grooves 7b and 7b provided at the peripheral end of the race 7a of the bearing 7 are covered by the fitting portions 8d and 9d of the bearing 7, the inner surface of the collars 8 and 9 is melted into the inside of the bearing 7 from between the both side portions of the bearing 7. The synthetic resin does not enter, and the smooth operation of the bearing 7 is not obstructed.

[Brief description of drawings]

FIG. 1 is a partial longitudinal sectional view showing a first embodiment of a caster of the invention of this application.

FIG. 2 is a partial vertical sectional view showing a second embodiment of the caster of the invention of this application.

FIG. 3 is a partial vertical cross-sectional view showing another aspect of the second embodiment of the caster of the invention of this application.

FIG. 4 is a partial vertical cross-sectional view showing another aspect of the second embodiment of the caster of the invention of this application.

FIG. 5 is a partial longitudinal sectional view showing a third embodiment of the caster of the invention of this application.

FIG. 6 is a partial longitudinal sectional view showing a fourth embodiment of the caster of the invention of this application.

FIG. 7 is an exploded perspective view of a caster devised in this application.

FIG. 8 is a partial vertical cross-sectional view of a conventional caster.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing member 2 Support frame 3 Bearing 4 Wheel 5 Axle 6 Sleeve 7 Bearing 7a Race 7b Inner peripheral groove 8 Collar 8a Step 8b Cover 8c Fitting groove 8d Fitting 9 Collar 9a Step 9b Cover 9c Fitting groove 9d fitting part

Claims (4)

[Scope of utility model registration request] 1. A fixing member 1 and a support frame 2 are provided with a bearing 3.
It is a caster that is integrally mounted via a support frame 2 and rotatably supports wheels 4 on the support frame 2. An axle 5 is inserted into the center of the wheel 4, and both ends of the axle 5 are fixed to the support frame 2. Then, the sleeve 6 is attached to the outer periphery of the axle 5 between the support frames 2, the sleeve 6 is fitted into the bearing 7, the wheel 4 is provided on the outer periphery of the bearing 7, and the outer peripheral portion of the sleeve 6 and the central portion of the wheel 4 are provided. A caster in which collars 8 and 9 having step portions 8a and 9a are sandwiched between both ends. 2. The fixing member 1 and the supporting frame 2 are provided with a bearing 3
It is a caster that is integrally mounted via a support frame 2 and rotatably supports wheels 4 on the support frame 2. An axle 5 is inserted into the center of the wheel 4, and both ends of the axle 5 are fixed to the support frame 2. Then, the sleeve 6 is attached to the outer periphery of the axle 5 between the support frames 2, the sleeve 6 is fitted into the bearing 7, the wheel 4 is provided on the outer periphery of the bearing 7, and the outer peripheral portion of the sleeve 6 and the central portion of the wheel 4 are provided. A caster characterized in that collars 8 and 9 having step portions 8a and 9a and covering portions 8b and 9b on the upper surface of the race 7a of the bearing 7 are sandwiched between both ends. 3. The fixing member 1 and the support frame 2 are provided with a bearing 3
It is a caster that is integrally mounted via a support frame 2 and rotatably supports wheels 4 on the support frame 2. An axle 5 is inserted into the center of the wheel 4, and both ends of the axle 5 are fixed to the support frame 2. Then, the sleeve 6 is attached to the outer periphery of the axle 5 between the support frames 2, the sleeve 6 is fitted into the bearing 7, the wheel 4 is provided on the outer periphery of the bearing 7, and the outer peripheral portion of the sleeve 6 and the central portion of the wheel 4 are provided. A caster, characterized in that collars (8, 9) having stepped portions (8a, 9a) and fitting grooves (8c, 9c) at the peripheral end of race (7a) of bearing (7) are held between both ends. 4. The fixing member 1 and the supporting frame 2 are provided with a bearing 3
It is a caster that is integrally mounted via a support frame 2 and rotatably supports wheels 4 on the support frame 2. An axle 5 is inserted into the center of the wheel 4, and both ends of the axle 5 are fixed to the support frame 2. Then, the sleeve 6 is attached to the outer periphery of the axle 5 between the support frames 2, the sleeve 6 is fitted into the bearing 7, the wheel 4 is provided on the outer periphery of the bearing 7, and the outer peripheral portion of the sleeve 6 and the central portion of the wheel 4 are provided. A caster characterized in that, between both ends, collars 8 and 9 having step portions 8a and 9a and fitting portions 8d and 9d into inner circumferential grooves 7b and 7b provided at the circumferential end of the race 7a of the bearing 7 are sandwiched.