JP6338823B2 - Twin wheel casters - Google Patents

Description

  The present invention relates to a twin wheel caster.

  In general, a twin-wheel caster is provided on left and right wheels, a caster body in which these wheels are rotatably supported via an axle, and a bottom of an attached body such as furniture provided at a position eccentric from the axle of the caster body. And a pivot shaft that is fixed. Normally, the caster body is used as a free wheel capable of freely turning around the turning axis and capable of traveling in any direction as the wheels rotate. By the way, in the conventional twin wheel caster, a side plate is attached to the outer surface of the wheel so as to move integrally with the wheel and prevent foreign matter from entering the rotating axle (see, for example, Patent Document 1). .

  By the way, in recent years, design has been demanded not only for casters but also for wheels, and the surface of the side plate is also designed, and the company name and logo are printed to create an advertising effect, which is used to appeal to customers. There are many cases.

JP 2008-213737 A

  However, in the caster shown in Patent Document 1, since the side plate rotates together with the wheel, even if a design is made on the surface of the side plate or a company name or logo is printed, the rotation of the wheel is lost due to the rotation. There is a problem that it ends up.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a twin-wheel caster that prevents the side plate from rotating even if the wheel rotates.

A twin-wheel caster according to a first aspect of the present invention includes a caster main body and wheels that are rotatably supported on both sides of the caster main body via an axle, and is fixed to the attached body so as to be rotatable via a pivot shaft. In the twin-wheel caster, the axle has a fixed shaft that protrudes from both sides of the caster body, and the fixed shaft is formed so as to match the non-circular through-hole in the cross section of the caster body, and is inserted into the through-hole and inserted at both ends. A shaft mounting member that protrudes from both sides of the caster body, and a cylindrical portion in which a hollow hole that fits into the protruding portion of the shaft mounting member is formed, and is connected to the cylindrical portion at the outer end of the cylindrical portion. formed integrally with, and flanged, the outer surface is arranged axially outward from the outer circumferential edge of the wheel, and has a side plate mounting portion side plate is mounted with Ikatsu hook covering the portion excluding the outer peripheral edge of the wheel With a shaft member Is configured, the side plate mounting portion, the hook portion of the side plate is engaged, is characterized in that the locking hole side plate is detachably mounted is formed.

The twin-wheel caster according to claim 1 of the present invention includes a caster body and wheels that are rotatably supported on both sides of the caster body via axles, and is fixed to the attached body so as to be pivotable via a pivot shaft. In the twin-wheel caster, the axle has a fixed shaft that protrudes from both sides of the caster body, and the fixed shaft is formed so as to match the non-circular through-hole in the cross section of the caster body, and is inserted into the through-hole and inserted at both ends. A shaft mounting member that protrudes from both sides of the caster body, and a cylindrical portion in which a hollow hole that fits into the protruding portion of the shaft mounting member is formed, and is connected to the cylindrical portion at the outer end of the cylindrical portion. formed integrally with, and flanged, the outer surface is arranged axially outward from the outer circumferential edge of the wheel, and has a side plate mounting portion side plate is mounted with Ikatsu hook covering the portion excluding the outer peripheral edge of the wheel With shaft member Configured Te, the side plate mounting portion, the hook portion of the side plate is engaged by locking hole side plate is detachably mounted is formed, though as the wheel does not rotate the side plates also be rotated And a stable design surface is ensured.

Twin wheel caster according to claim 2 of the present invention, the shaft member is configured with the shaft attachment member annular shaft member hole to fit is formed protrusions, the projecting end of the shaft attachment member A plate-like side plate mounting member is attached to the outside of the annular shaft member, and the side plate mounting member is formed with a locking hole in which a collar portion of the side plate is locked and the side plate is detachably mounted. It is what.

The twin-wheel caster according to claim 3 of the present invention is characterized in that the through-hole is formed in a notch circle having a cross-section cut out of a part of the circle, and the annular shaft member is constituted by a bearing member. It is.

The twin-wheel caster according to the present invention includes a caster body and wheels that are rotatably supported on both sides of the caster body via an axle. The axle has a fixed shaft that protrudes from both sides of the caster body, and the fixed shaft is formed so as to match a non-circular through-hole in the cross section of the caster body, and is inserted into the through-hole and has projections at both ends. A shaft mounting member projecting from both sides of the main body, a cylindrical portion formed with a hollow hole that fits into the projecting portion of the shaft mounting member, and continuously and integrally with the cylindrical portion at the outer end of the cylindrical portion; is formed in a flange shape, the outer surface is arranged axially outward from the outer circumferential edge of the wheel, and a shaft member having a side plate mounting portion side plate is mounted with Ikatsu hook covering the portion excluding the outer peripheral edge of the wheel Configured with The side plate mounting portion, the hook portion of the side plate is engaged, since engagement hole side plate is detachably mounted is formed, even if the wheel is rotating, without rotating the side plate always stable The designed surface can be secured.

FIG. 1 is a perspective view showing a twin-wheel caster according to a first embodiment of the present invention. Example 1 FIG. 2 is a longitudinal sectional view of the twin-wheel caster of FIG. FIG. 3 is a perspective view of a main part showing a state where one wheel of the twin-wheel caster of FIG. 1 is removed. FIG. 4 is a perspective view of the main part showing a state where one wheel of the twin-wheel caster of FIG. 1 is removed. FIG. 5 is a perspective view showing a twin-wheel caster according to a second embodiment of the present invention. (Example 2) 6 is a longitudinal sectional view of the twin-wheel caster of FIG. FIG. 7 is an explanatory diagram of a main part of the twin-wheel caster of FIG. FIG. 8 is a perspective view of the main part showing a state where one wheel of the twin-wheel caster of FIG. 5 is removed. FIG. 9 is a perspective view of an essential part showing a state in which one wheel of the twin-wheel caster of FIG. 5 is removed. FIG. 10 is an explanatory diagram of a twin-wheel caster according to a modification of the second embodiment. (Example 3)

  For the purpose of fixing the side plate without rotating and securing the design surface without being affected by the rotation of the wheel, the caster body and the wheels supported on both sides of the caster body via the axle are rotatably supported. In a twin-wheel caster fixed to a body to be mounted so as to be able to turn via a turning shaft, the axle is constituted by a fixed shaft provided so as to protrude from both sides of the caster body, and side plates are mounted on the outside of the fixed shaft protruding portions. This was realized by providing a side plate mounting part.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. As shown in FIGS. 1 and 2, the twin-wheel caster 2 according to the first embodiment of the present invention has a caster main body 3 in which a through hole 10 is formed to penetrate in the left-right direction, and the caster main body 3 is rotatable. The wheels 5A and 5B supported by the wheel 5 and the pivot shaft 6 rotatably fitted in a mounting hole (not shown) formed vertically on the caster body 3 so as to be decentered forward in the traveling direction. ing. The twin-wheel caster 2 is fixed to the mounted body so as to be capable of turning via a turning shaft 6.

  By the way, in the twin-wheel caster 2 according to the present embodiment, the fixed shaft (axle) 4 is provided so as to protrude from the both side surfaces 3 </ b> A and 3 </ b> B of the caster body 3. The fixed shaft 4 is inserted into the through hole 10 of the caster body 3 and both ends thereof are fitted to the shaft mounting member 11 projecting from the caster body both sides 3A and 3B and the projecting portions 11A and 11B of the shaft mounting member 11, respectively. The shaft members 12 and 12 to be attached are provided. The through hole 10 is formed in a hexagonal shape with a non-circular cross section. The rod-shaped shaft attachment member 11 is formed in conformity with the cross-sectional shape of the through-hole 10, that is, in a hexagonal cross-section. The shaft member 12 has a cylindrical portion 12A in which a hollow hole that fits into the protruding portions 11A and 11B of the shaft mounting member 11 is formed and the outer periphery is formed in a circular shape. At the outer end of the cylindrical portion 12A, a collar portion (side plate mounting portion) 12B is formed in a circular shape integrally with the cylindrical portion 12A. The wheels 5 </ b> A and 5 </ b> B are rotatably fitted to the cylindrical portion 12 </ b> A of the shaft member 12 through the shaft hole 7. On the other hand, the shaft mounting member 11 inserted through the through hole 10 and the shaft members 12 and 12 fitted into the protruding portions 11A and 11B of the shaft mounting member 11 are also prevented from rotating.

  Locking holes 14 are formed in the flange portion 12B of the shaft member 12 at equal intervals on the outer peripheral side. A hook 16 formed inside the side plate 15 is locked in the locking hole 14, and the side plate 15 is detachably attached to the hook 12B. An annular protrusion 17 is formed on the outer surface of the flange portion 12 </ b> B on the inner peripheral side from the locking hole 14, and comes into contact with the inner surface of the side plate 15. A screw 18 is screwed on the end surface of the shaft mounting member 11 via a washer so as to prevent the shaft member 12 from falling off the shaft mounting member 11. The outer surface 15A of the side plate 15 is a design surface formed flat.

  Next, the operation of the twin wheel caster 2 according to the above embodiment will be described. In the twin-wheel caster 2 according to the above-described embodiment, the shaft mounting member 11 is inserted into the through hole 10 of the caster body 3, and both end portions of the shaft mounting member 11 are protruded from the both sides 3A and 3B of the caster body. Next, after attaching the wheels 5A and 5B to the cylindrical portions 12A and 12A of the shaft members 12 and 12, the shaft members 12 and 12 are fitted into the projecting portions 11A and 11B of the shaft mounting member 11, and fixed with screws 18. And the side board 15 is attached to the collar part 12B, and the assembly | attachment of the twin-wheel caster 2 is completed. Since the fixed shafts 11 and 12 that are axles are fixed to the twin-wheel caster 2 assembled in this way, the side plate 15 attached to the flange portion 12B does not rotate and is always fixed. It is. For this reason, when the surface of the side plate 15 is used as a design surface, even if the twin-wheel caster is running, the design surface is not damaged, and the design surface is held stationary regardless of whether it is running or stopped. it can.

  FIGS. 5 to 8 show a twin-wheel caster 22 according to the second embodiment of the present invention. The twin-wheel caster 22 according to the second embodiment is the same as the twin-wheel caster 2 according to the first embodiment. However, the fixed shaft 4 is composed of the shaft mounting member 11 and the shaft member 12, and the shaft member 12 is composed of the cylindrical portion 12A and the flange portion 12B integrally formed on the outer end of the cylindrical portion 12A. In contrast, the fixed shaft 24 is constituted by a shaft mounting member 31 and an annular shaft member 32, and a different disk-shaped side plate mounting member 33 is mounted on the protruding end of the shaft mounting member 31.

  That is, the twin-wheel caster 22 according to the second embodiment includes a caster body 23 through which a through-hole 30 having a non-circular cross section penetrates to the left and right, and wheels 25A and 25B rotatably supported by the caster body 23. Yes. The through-holes 30 have longitudinal cross-sectional ends that are opposite to each other in the vertical direction, and the opposite ends of the arc-shaped portions 30A and 30B facing each other in the vertical direction are connected in parallel by straight lines 30C and 30D. It is formed in a circular shape with both ends cut out. The arc-shaped portions 30A and 30B form a part of a perfect circle with the same center. The rod-shaped shaft attachment member 31 that constitutes a part of the fixed shaft 24 has a cross-sectional shape that matches the through-hole 30 and is formed in a circular cutout shape in both longitudinal directions. The annular shaft member 32 is formed therein with holes that are fitted into the protruding portions 31A and 31B at both ends of the shaft mounting member 31 and has a circular outer periphery. When the shaft mounting member 31 is inserted into the through hole 30, both end portions protrude from the caster body both sides 23A and 23B. The annular shaft members 32 and 32 are fitted and attached to the protruding portions 31A and 31B of the shaft mounting member 31, respectively. Therefore, the shaft attachment member 31 and the annular shaft members 32 and 32 are prevented from rotating, while the wheels 25A and 25B are rotatably fitted to the annular shaft members 32 and 32 via the shaft holes 27. It is like that.

  A disk-shaped side plate mounting member (side plate mounting portion) 33 is mounted on the shaft mounting member 31 on the outside of the annular shaft members 32 and 32, respectively. The side plate mounting member 33 is formed with locking holes 34 at equal intervals on the outer periphery. A hook 36 formed inside the side plate 35 is locked in the locking hole 34, and the side plate 35 is detachably mounted on the side plate mounting member 33. On the outer surface of the side plate mounting member 33, an annular protrusion 37 is formed on the inner peripheral side from the locking hole 34, and comes into contact with the inner surface of the side plate 35. The outer surface 15A of the side plate 35 is a design surface formed in a gently curved surface.

  Since the twin-wheel caster 22 according to the second embodiment is configured as described above, the shaft mounting member 31 is inserted into the through-hole 30 of the caster body 23, and both ends of the shaft mounting member 31 are caster. Project from both sides 23A and 23B of the main body. Next, after the annular shaft members 32 and 32 are mounted in the shaft holes of the wheels 25A and 25B, the annular shaft members 32 and 32 are fitted into the projecting portions 31A and 31B of the shaft mounting member 31, respectively, and the side plate mounting member 33 is pivoted. The attachment member 31 is attached to the outside of the annular shaft members 32, 32, and is fixed with a fixture (not shown). The side plate 35 is attached to the side plate mounting member 33, and the assembly of the twin wheel caster 22 is completed. Since the fixed shaft 24 which is an axle is fixed to the twin-wheel caster 22 assembled in this way, the side plate 35 attached to the side plate mounting member 33 does not rotate as in the first embodiment. , Always kept fixed. In the second embodiment, the cross-sectional shape of the through hole 30 is formed in a notch shape on both sides and the shaft mounting member 31 is formed so as to match this cross-sectional shape. However, the present invention is not limited to this. Alternatively, a shape obtained by cutting out a part of a perfect circle may be used, or an oval shape (elliptical shape) may be used.

  Next, a modified example of the twin wheel caster 22 according to the second embodiment will be described. A twin-wheel caster 42 according to this modified example is shown in FIG. 10, whereas the twin-wheel caster 22 according to the second embodiment has a fixed shaft 24 constituted by a shaft mounting member 31 and an annular shaft member 32. As described above, the second embodiment is substantially the same as the second embodiment except that a bearing (bearing member) 52 is used instead of the annular shaft member 32. In the twin-wheel caster 42 according to this modification, the fixed shaft 44 is constituted by the shaft mounting member 31 and the bearing 52, so that the strength of the twin-wheel caster 42 can be improved.

  In the above modification, an example in which the bearing 52 is used instead of the annular shaft member 32 is shown, but the present invention is not limited to this, and the cylindrical portion 12A and the wheel 5A of the shaft member 12 of the first embodiment are not limited thereto. And a bearing may be provided between 5B and 5B.

2 Twin-wheel caster 3 Caster body 3A, 3B Both sides of caster body 4 Fixed shaft 5A, 5B Wheel 6 Rotating shaft 12B Hook (side plate mounting portion)
15 Side plate

Claims (3)

In a two-wheel caster that includes a caster body and wheels that are rotatably supported on both sides of the caster body via an axle, and is fixed to the mounted body so as to be pivotable via a pivot shaft.
The axle has a fixed shaft protruding from both sides of the caster body,
The fixed shaft is formed so as to match the non-circular through-hole in the cross section of the caster body, and the shaft mounting member is inserted through the through hole and protrudes from both ends of the caster body.
A cylindrical portion having a hollow hole formed in the protruding portion of the shaft mounting member is formed, and the outer end of the cylindrical portion is continuously and integrally formed with the cylindrical portion, and has an outer surface formed outside the wheel. disposed axially outwardly from the periphery, and a side plate having a Ikatsu hook covering the portion excluding the outer peripheral edge of the wheel is constituted by a shaft member having a side plate mounting portion to be mounted,
The twin wheel caster according to claim 1, wherein the side plate mounting portion is formed with a locking hole in which a collar portion of the side plate is locked and the side plate is detachably mounted . The shaft member is configured with the shaft attachment member annular shaft member hole to fit is formed protrusions,
At the protruding end of the shaft mounting member, a plate-like side plate mounting member is attached to the outside of the annular shaft member ,
The twin wheel caster according to claim 1, wherein the side plate mounting member is formed with a locking hole in which a collar portion of the side plate is locked and the side plate is detachably mounted . The through hole is formed in a cutout circle with a cross section cut out of a part of the circle,
The twin wheel caster according to claim 2 , wherein the annular shaft member is constituted by a bearing member.

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