JP6886179B2 - Guarded wheels - Google Patents

Description

The present invention relates to a guarded wheel in which a guard frame is attached to a wheel such as a caster wheel used for a trolley or the like.

Caster wheels (universal metal fitting wheels) and fixed wheels are used for trolleys, moving bodies, etc. to make them movable, and these wheels have guards to prevent the wheels from riding on human feet or curbs. A ride-prevention frame is attached.
The technique of Patent Document 1 includes a base body and a plurality of free wheels provided on the lower surface of the base body, and a riding prevention frame is attached so as to surround the free wheels to prevent riding. The frame body is formed so as to connect to the lower end of the outer peripheral frame and to orbit the wheel in the horizontal direction with the outer peripheral frame formed so as to cover at least 50% above the outer periphery of the wheel of the universal wheel in the vertical direction. The lower end frame of the riding prevention frame body is attached to each wheel of the plurality of free wheels by rotating in the horizontal direction at a distance of 3 to 10 mm (claims 1 to 3). ).

Japanese Unexamined Patent Publication No. 2003-267228

In the conventional technique, since the lower end frame that orbits in the horizontal direction is attached to the outer peripheral frame that covers at least 50% in the vertical direction, it is possible to prevent the vehicle from riding on a human foot or a rim stone, but the upper part of the outer peripheral frame supports the wheel. Since it is attached to the upper part of the support, it is difficult to increase the support strength of the lower end frame, and since the lower end frame is located below the center of the wheel axis over the entire length, the arm of the support and the wheel It is difficult to prevent ropes and other cords from getting caught between them.

Further, in the above-mentioned prior art, it is difficult to mount the lower end frame on the support unless the outer peripheral frame is provided, and the left and right side portions of the lower end frame are displaced in the axial direction of the bearing portion of the support and the wheel shaft. It is difficult to prevent stable entanglement on the left and right sides of the wheel.
An object of the present invention is to provide a guarded wheel capable of solving such a problem of the prior art.

In the present invention, a guard frame surrounding the outer circumference of the wheel body is attached to the arm with the fitting recesses on the left and right side walls fitted to the bearing portion at the lower part of the arm, thereby preventing riding and getting caught. , An object of the present invention is to provide a wheel with a guard capable of facilitating the mounting of a guard frame.

Specific means for solving the problem in the present invention are as follows.
First, a support 4 having a bearing portion 3a under the bifurcated arm 3, an axle 5 supported by the bearing portion 3a of the support body 4, and a wheel body rotatably supported by the axle 5. A guarded wheel having 6 and a guard frame 7 mounted on the support 4 and surrounding the outside of the wheel 6.
The guard frame 7 has front and rear walls 7a and left and right side walls 7b and is formed in a substantially rectangular shape in a plan view. Has been formed and
The guard frame 7 is attached to the arm 3 with the fitting recess D fitted to the bearing portion 3a.
The left and right side walls 7b are characterized in that front and rear covering portions E are formed in front of and behind the fitting recess D to cover the bearing portions 3a of the arm 3 in the front and rear to a position higher than the center of the axle 5.

Secondly, a mounting plate 8 projecting from the fitting recess D and fitting to the axle 5 is attached to the outer surface of each of the left and right side walls 7b at substantially the center in the front-rear direction, and the mounting plate 8 is fitted. The portion protruding from the recess D is in contact with the outer surface of the bearing portion 3a of the left and right arms 3 and is prevented from rotating with respect to the axle 5.
Thirdly, the front and rear walls 7a of the guard frame 7 are formed from a height lower than the axle 5 to a height higher than the center P of the axle 5.

Fourth, the upper edges F of the left and right side walls 7b of the guard frame 7 are gradually inclined upward from the top of the front and rear walls 7a to the front and rear covering portions E.

According to the present invention, it is possible to facilitate the attachment of the guard frame while preventing the person from riding on the foot or the curb and preventing the cord body from getting caught.
That is, in the invention according to claim 1, the guard frame 7 surrounding the outer periphery of the wheel body 6 is fitted and mounted on the bearing portion 3a at the lower part of the arm 3 of the support body 4, and the bearing portion 3a is mounted below the bearing portion 3a. Since it surrounds the ring body 6 from the center P to the upper side, it is possible to prevent a person from riding on a foot or a curb, sufficiently prevent the cord body from getting caught, and it is possible to easily attach the guard frame 7. ..

According to the second aspect of the present invention, a mounting plate 8 projecting from the fitting recess D and fitting to the axle 5 is attached to the outer surface of each of the left and right side walls 7b at substantially the center in the front-rear direction. Since the portion protruding from the fitting recess D is in contact with the outer surface of the bearing portion 3a of the left and right arms 3 and is stopped from rotating with respect to the axle 5, the guard frame 7 can be easily formed and assembled.
In the invention according to claim 3, since the front and rear walls 7a of the guard frame 7 are formed from a height lower than the axle 5 to a height higher than the center P of the axle 5, the effect of preventing riding and getting caught is improved. it can.

In the invention according to claim 4, since the upper edge F of each of the left and right side walls 7b of the guard frame 7 is gradually inclined upward from the top of the front and rear wall 7a to the front and rear covering portion E, the effect of preventing entrainment can be improved.

It is a side view which shows the embodiment of this invention. It is the same front view. It is the same plan view. It is a top view of the guard frame. FIG. 5 is a cross-sectional view taken along line XX of FIG. It is a side view which shows the 2nd Embodiment of a guard frame. It is a side view which shows the 3rd Embodiment of a guard frame.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIGS. 1 to 5, a caster wheel (universal metal fitting wheel) is illustrated as a guarded wheel 1 mounted on the lower surface of a moving body 11 such as a trolley or a cart.
The guarded wheel 1 is supported by a base 12 mounted on the lower surface of the moving body 11, a support 4 rotatably supported by the base 12 around the vertical axis, and a lower portion of the support 4. It has an axle 5, a wheel 6 rotatably supported by the axle 5, and a guard frame 7 mounted on the support 4 and surrounding the outside of the wheel 6.

The upper part of the support 4 is a circular portion 4a, and a bifurcated arm 3 projects downward from the circular portion 4a with a caster angle, and each lower portion of the bifurcated arm 3 is a bearing portion that penetrates and supports the axle 5. It is 3a.
A bolt with a head is used for the axle 5, and a nut 13 is screwed to the tip of the axle 5 so as to penetrate the pair of bearing portions 3a and the wheel body 6. A detent projection 14 is formed in the vicinity of the bolt head portion 5a of the axle 5.

The wheel body 6 is a metal wheel fitted with a rubber tire, but may be an iron wheel body.
The guard frame 7 has front and rear walls 7a and left and right side walls 7b and is formed in a substantially rectangular shape in a plan view. A thin mounting plate 8 fitted to the axle 5 is attached to the outer surface of each of the left and right side walls 7b at substantially the center in the front-rear direction. Has been done.
The guard frame 7 may be formed by welding four plate materials into a rectangular shape, but the plate material having the side wall 7b and the wall 7a is cut out by press working and bent at a right angle between the side wall 7b and the wall 7a. , Two pieces of the L-shaped material are prepared, and the free end of the side wall 7b of each L-shaped material is welded to the free end of the wall 7a of the other L-shaped material.

A fitting recess D opened upward and a front and rear covering portions E of the fitting recess D are formed at substantially the center of each of the left and right side walls 7b in the front-rear direction.
In the fitting recess D, an arcuate bottom Da is formed substantially in the center of the side wall 7b in the front-rear direction, and a front inclined edge Db inclined upward and forward from the front end of the bottom Da to the vicinity of the apex of the front covering portion E is formed, and the bottom portion. A rear-inclined edge Dc is formed that is inclined upward and backward from the rear end of Da to the vicinity of the apex of the back-covering portion E, and the front-rear inclined edges Db and Dc are substantially symmetrical with respect to the front-rear center of the side wall 7b, and are upward from the bottom Da. It forms an opening that spreads toward the end.

The curvature of the arc of the bottom Da of the fitting recess D is substantially equal to the outer peripheral curvature of the bearing portion 3a of the arm 3, and the bearing portion 3a has a shape substantially conforming to the bottom Da. The inclination angles of the inclined edges Db and Dc are substantially equal to the caster angle of the arm 3, and the front and rear edges of the arm 3 are substantially in close contact with the front and rear inclined edges Db and Dc.
Since the front-rear inclined edges Db and Dc have substantially the same inclination angle, one of the front-rear inclined edges Db and Dc can be substantially brought into close contact with the arm 3 even if the L-shaped material used as the above-mentioned material is formed in the same manner. ..

The lower edge of the guard frame 7 is lower than the axle 5, and the height from the ground is lower than that of the human foot or curb, which prevents the wheel body 6 from riding on the human foot or curb.
The front and rear walls 7a of the guard frame 7 are formed from a height lower than the axle 5 to a height higher than the center P of the axle 5, and the upper edges F of the left and right side walls 7b of the guard frame 7 are the axle 5 It is formed substantially horizontally up to the front and rear covering portion E at a higher position.

The mounting plate 8 attached to the outer surface of each of the left and right side walls 7b of the guard frame 7 is formed with a through hole 8a penetrating the axle 5, and penetrates the mounting plate 8 on the side where the bolt head 5a of the axle 5 abuts. A square groove 8b continuous with the hole 8a is formed. The square groove 8b can be engaged with the detent protrusion 14 in the vicinity of the bolt head portion 5a, and by engaging with the detent projection 14, the guard frame 7 is detented.
When the fitting recesses D are fitted into the bearing portion 3a of the arm 3, the left and right side walls 7b of the guard frame 7 are substantially flush with each other, and the mounting plate 8 comes into contact with the bearing portion 3a. When the axle 5 is penetrated through these, the bolt head portion 5a comes into contact with the outer surface of the mounting plate 8, the anti-rotation protrusion 14 engages with the square groove 8b, and the nut 13 is screwed and fastened to the axle 5.

Therefore, in the axial direction of the axle 5, the left and right side walls 7b do not overlap with the bearing portion 3a of the arm 3 and the wheel body 6, so that the length of the axle 5 can be shortened and the wheel of the prior art having no guard frame 7 is provided. It is also possible to retrofit the guard frame 7 to the wheel, which makes it extremely easy to mount the guard frame 7.
A brake lever 16a of the braking means 16 is pivotally supported on the upper portion of the support body 4, and the brake lever 16a is provided with a brake pad 16b that is pressed against the wheel body 6 by rotating.

FIG. 6 shows a second embodiment of the guard frame, in which the front and rear walls 7a of the guard frame 7 are erected from a height lower than the axle 5 to a height slightly higher than the center P of the axle 5 and guard. The left and right side walls 7b of the frame 7 are formed with mountain-shaped front and rear covering portions E that rise from the front and rear ends to the fitting recess D side. The front and rear covering portion E is higher than the upper end of the mounting plate 8.
The upper edges F of the left and right side walls 7b of the guard frame 7 are gradually inclined upward from the top of the front / rear wall 7a slightly higher than the center P of the axle 5 to the front / rear covering portion E higher, and the rope, string, etc. It prevents the cord body from entering between the arm 3 and the ring body 6, that is, prevents the cord body from being caught.

FIG. 7 shows a third embodiment of the guard frame, in which the front and rear walls 7a of the guard frame 7 are erected from a height lower than the axle 5 to a height slightly lower than the center P of the axle 5 and guard. The left and right side walls 7b of the frame 7 are formed with mountain-shaped front and rear covering portions E that rise from the front and rear ends to the fitting recess D side.
The upper edges F of the left and right side walls 7b of the guard frame 7 are gradually inclined upward from the top of the front / rear wall 7a slightly lower than the center P of the axle 5 to the front / rear covering portion E to prevent the cord body from being caught. However, it is possible to form it at a lower cost.

The present invention is not limited to the above embodiment, and the shape, configuration, combination, and the like of the members can be changed.
For example, the bifurcated arm 3 of the support 4 is formed in a vertical posture without caster angles, and the front and rear edges of the fitting recesses D of the left and right side walls 7b are also formed in a parallel vertical posture without caster angles. The support 4 may be directly attached to the lower surface of the moving body 11 to form the guarded wheel 1 as a fixed wheel.

Further, the mounting plate 8 may be omitted, and the left and right side walls 7b may be welded to the arm 3 in a state where the fitting recess D is fitted to the bearing portion 3a of the arm 3 for mounting.
Further, when the mounting plate 8 is provided, the mounting plate 8 may be arranged so as to horizontally straddle the fitting recess D and may be fixed to the front / rear covering portion E.
Furthermore, instead of providing the anti-rotation protrusion 14 on the axle 5, the anti-rotation pin may be penetrated through the mounting plate 8 and the bearing portion 3a.

1 Wheel with guard 3 Arm 3a Bearing part 4 Support 4a Circular part 5 Axle 5a Bolt head 6 Wheel body 7 Guard frame 7a Front and rear walls 7b Side wall 8 Mounting plate 8a Through hole 8b Square groove 11 Moving body 12 Base 13 Nut 14 Protrusion D Fitting recess Da Bottom Db Front inclined edge Dc Rear inclined edge E Covering part F Upper edge

Claims (4)

A support (4) having a bearing portion (3a) under the bifurcated arm (3), an axle (5) supported by the bearing portion (3a) of the support (4), and this axle (5). ), And a guarded wheel having a ring body (6) rotatably supported by the support body (4) and a guard frame (7) attached to the support body (4) and surrounding the outside of the wheel body (6). And
The guard frame (7) has front and rear walls (7a) and left and right side walls (7b) and is formed in a substantially rectangular shape in a plan view. A fitting recess (D) into which the bearing portion (3a) enters is formed.
The guard frame (7) is attached to the arm (3) with the fitting recess (D) fitted to the bearing portion (3a).
The left and right side walls (7b) are front and rear covers that cover the bearing portion (3a) of the arm (3) in the front and rear of the fitting recess (D) to a position higher than the center (P) of the axle (5). A guarded wheel characterized in that a portion (E) is formed. A mounting plate (8) protruding from the fitting recess (D) and fitting to the axle (5) is attached to the outer surface of each of the left and right side walls (7b) substantially in the center in the front-rear direction. (8) is characterized in that the portion protruding from the fitting recess (D) is in contact with the outer surface of the bearing portion (3a) of the left and right arms (3) and is prevented from rotating with respect to the axle (5). The guarded wheel according to claim 1. Claim 1 is characterized in that the front and rear walls (7a) of the guard frame (7) are formed from a height lower than the axle (5) to a height higher than the center (P) of the axle (5). Or the guarded wheel according to 2. 3. The upper edge (F) of each of the left and right side walls (7b) of the guard frame (7) is gradually inclined upward from the top of the front / rear wall (7a) to the front / rear covering portion (E). Wheels with guards as described in.

Images