JP2015024800A - Heavy object movable carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carriage which can safely move a heavy object such as furniture by easily turning the direction of the heavy object.SOLUTION: A heavy object movable carriage 1 includes a load receiving platform 3 provided at an upper part of a main body 1, a caster main body 7 which is rotatably supported by a caster shaft 4 on the lower part of the main body 1, and a plurality of rollers 6 which are rotatably supported by a roller shaft 5 on the lower part of the caster main body 7. The plurality of heavy object movable carriages 1 in which the plurality of caster shafts 4 are arranged on the central part of the load receiving platform 3 and outer sides than the outer peripheral edge of the load receiving platform 3 are inserted under a heavy object W such as furniture to support the heavy object W and to enable the heavy object W to be turnably moved.

Description

The present invention relates to a heavy-duty moving carriage used for safely and easily moving a heavy object such as a chiffon or an arrangement shelf used in a general home or office.

FIG. 8 is a perspective view showing a conventional cart 50. This conventional example is the same type as that described in, for example, registered utility model No. 3051835. A rotary table 52 supported by a rotary shaft 53 so as to be horizontally movable is provided on the main body 51. A front roller 55 is pivotally supported by a front roller shaft 54 at a lower end portion, and a rear roller 57 is pivoted by a rear roller shaft 56. As shown in FIG. 9, at least four of the carts 50 are inserted into the lower four corners of the heavy object W such as furniture to support the heavy object W, and the heavy object is loaded by the load received from the heavy object W. It was able to move integrally with W.

Registered Utility Model No. 3051835

In the above-described carriage, for example, when the force F is applied to the heavy object W placed on the turntable 52 to change the direction as shown in the bottom view shown in FIG. The front roller 55 generates a force 55f that rotates the rotation shaft 53 of the turntable 52 clockwise with a radius 54r around the point 54a of the front roller shaft 54, and the rear roller 57 is centered on the point 56a of the rear roller shaft 56. A force 57f that rotates the rotating shaft 53 of the turntable 52 in the counterclockwise direction with a radius 56r is generated, and since there is no difference between the distance 54r and the distance 56r, the directions are opposite with each other, canceling each other and changing directions. Without traveling, the vehicle traveled only in the direction of the roller, corresponding to the component F of the force F. Even when there is a difference between the distance 54r and the distance 56r, the main body 51 must rotate horizontally around the rotation shaft 53. Therefore, the front roller 55 and the rear roller 57 are not rolling with respect to the floor but sliding. Rotation movement is necessary, causing damage to the floor and causing the heavy object W to fall from the carriage 50. Therefore, each time the direction is changed, the heavy article W is lifted and the main body 51 of the carriage 50 is moved by hand. The direction of the front roller 55 and the rear roller 57 must be changed by horizontally rotating in a desired direction.

In addition, since four carts 50 are inserted into the four corners of the lower surface of the heavy object W, it is very difficult to set all four in the same direction without error, and the cart 50 facing the other side is When the friction between the rotary table 52 and the heavy object W is large during the movement of the heavy object W, the front roller 55 or the rear roller 57 and the floor slip, and the floor is damaged. The heavy object W may fall off and cause injury or an accident.

In order to solve the above problems, the heavy-duty moving carriage of the present invention includes a load receiving platform provided at the upper part of the main body, a caster main body rotatably supported by a caster shaft at the lower part of the main body, A plurality of rollers rotatably supported by roller shafts are provided at the lower part of the caster body, and a plurality of the caster shafts are arranged outside a center portion of the load receiving platform and an outer peripheral end of the load receiving platform. To do.

Second, the caster body is characterized in that the front edge in the rolling direction of the roller is higher than the right and left side edges in the roller axial direction with respect to the ground contact surface of the roller.

Third, three to five caster shafts are arranged at equal intervals outside the outer peripheral end of the load receiving platform.

According to the present invention, since the caster body is pivotally supported by the caster shaft at the lower part of the cart body, the furniture is lifted and the cart is moved in the direction in which it is desired to move each time the direction is changed. There is no need to rotate the roller horizontally and change the direction of the roller, and by manually pushing in the direction you want to direct the heavy object such as furniture, all the rollers at the bottom of the carriage are directed in the desired direction, the heavy object is changed direction properly, The burden on the operator is very small.

Further, according to the present invention, since the caster shaft is arranged at the center of the load receiving platform, the load applied to the load receiving platform even if the roller on the front side in the traveling direction travels while the cart is moving. Is supported by a caster shaft at the center, and the carriage moves smoothly and safely without fitting into the floor groove, and the flooring can be used on tatami mats, flooring, tiles, wood decks, etc.

Further, according to the present invention, since the caster shaft is arranged outside the outer peripheral end of the load receiving platform, even when a heavy object such as furniture deviates from the center of the load receiving platform, the range of the load receiving platform is left. Unless you do, the cart will not tip over.

Further, according to the present invention, the caster body is rotatably supported by the caster shaft at the lower portion of the cart body, so that it is necessary to insert all four carts in the same direction in the four corners of the lower surface of the furniture without error. In addition, even if the rollers are set in different directions, the direction of all the rollers is suitably changed, so that the carriage can be safely moved without moving the carriage from the furniture during traveling.

Furthermore, according to the present invention, since the front edge of all caster bodies at the lower part of the carriage is higher than the ground contact surface of the roller compared to the left and right side edges, even if the surface of the tatami is wavy The furniture can be moved smoothly without touching the tatami mat.

The perspective view which shows 1st embodiment of this invention. CC 'sectional view showing the first embodiment of the present invention The side view which shows the groove movement of 1st embodiment of this invention Table showing the number of caster shafts of the present invention arranged at equal intervals outside the outer peripheral edge of the load receiving platform, the experimental results of the running performance of each flooring, and the manufacturing cost The bottom view which shows 1st embodiment of this invention The perspective view for example of use showing the first embodiment of the present invention The side view which shows the tatami movement of 1st embodiment of this invention Perspective view showing a conventional example Perspective view for explaining a use example showing a conventional example Bottom view showing a conventional example

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line CC ′. The main body 2 of the carriage 1 has a curved disk shape with a size of about 120 mm, is formed of synthetic resin, is provided with a concave seat for holding the load receiving platform 3 at the center of the upper surface, and opens at the lower surface at one location in the center. The caster shafts 4 are provided at five locations at regular intervals outside the outer peripheral end of the load receiving platform 3, and the caster shafts 4 are molded and integrated with the main body 2 and the respective caster shafts 4 are horizontally rotated. The caster body 7 is pivotally supported, and the caster shaft 4 is disposed at a position where the caster body 7 does not interfere with each other by horizontal rotation.

As shown in FIG. 3, the cart 1 according to the present invention has a load applied to the load receiving platform 3 even when the roller 6 in the forefront row in the traveling direction is on the groove G of the floor U moving the heavy object W. Is supported by the caster shaft 4 in the central portion, receives the load of the heavy object W in a well-balanced manner, and the carriage 1 can move smoothly and safely without fitting into the groove G of the floor U.

As shown in FIG. 4, the quantity of the caster shaft 4 arranged outside the outer peripheral end of the load receiving platform 3 at equal intervals has an effect of traveling in the groove G of the floor U even if the number of arrangement is more than five. Since only the manufacturing cost is increased and it is difficult to smoothly travel the groove G of the floor U with three, the arrangement of five is most cost-effective.

The load receiving platform 3 is fixed with a pressure-sensitive adhesive to a concave seat provided in the center of the upper surface of the main body 2 and is shaped like a circular plate in plan view, and is made of a synthetic resin foam and is elastic and non-slip. It absorbs the difference in the height direction between the heavy object W and the floor U due to the distortion of the floor U, resists sliding between the heavy object W and the carriage 1, and the carriage 1 is moving It is prevented from coming out from under the heavy object W.

The caster shaft 4 is made of metal, has a function of high strength and toughness with a wire diameter of about 5 mm, the tip 4a is thin, and a part of the entire circumference is recessed with a recess 4b. The caster main body 7 is held in a horizontal rotation by fitting with the convex 7a provided on the inner wall of the boss hole opened upward on the center front side, so that it is thin when the load received from the heavy load W is transmitted to the caster main body 7. The tip 4a reduces the contact area with the caster main body 7, reduces frictional resistance and enables smooth rotation, and prevents the caster main body 7 from being detached from the caster shaft 4 by its own weight when the main body 2 is lifted. .

The caster body 7 is formed of a synthetic resin and has a curved shape covering the roller 6. As shown in FIG. 5, a receiving portion for holding the roller shaft 5 is provided at the lower portions of the left and right side surfaces, and two metal roller shafts 5 are provided. The synthetic resin rollers 6 are rotatably supported, and the centers of the rollers 6 are arranged so that the distance A is equal to the center of the caster shaft 4. The center of the roller shaft 5 is the center of the caster shaft 4. The distance B is arranged.

Therefore, as shown in FIG. 6, at least four carts 1 of the present invention are inserted into the lower four corners of the heavy object W such as furniture to support the heavy object W, and the weight received by the load from the heavy object W is increased. When the carriage 1 is moved integrally with the object W, even if the carriage 1 is set in different directions on the lower surface 4 corners of the heavy object W such as furniture, the direction in which the heavy object W such as furniture is directed as shown in FIG. When the force Fn is pushed by hand and applied to the caster shaft 4, the component force fn in the rotational direction of the force Fn acts at a radius 5r around the point 5a of the roller shaft 5, and the roller 6 rotates in each direction 6f. The caster shaft 4 rotates about the point 5a of 5 and relative rotation occurs between the main body 2 and the caster main body 7, and the rotational component force fn considering the point 5a of the roller shaft 5 gradually decreases. When all the rollers 6 are directed in the direction of the desired force Fn, The directional component force fn becomes zero, the relative rotation of the main body 2 and the caster main body 7 stops, and all the rollers 6 rotate in the direction of the force Fn, so that the cart 1 is not detached from the heavy object W such as furniture. W can be moved and changed direction suitably.

Further, as shown in FIG. 7, the front edge portion 7b of the caster body 7 is higher than the ground contact surface of the roller as compared with the left and right side edge portions 7c. Since the tatami mat Tf is sewn at the end of the tatami floor Td in the structure of the tatami mat, when the roller 6 runs on the tatami mat T, undulation Tn is generated on the traveling direction side of the tatami mat Tf, but the front edge 7b The cart 1 can travel without causing

As described above, since the carriage is compact, it can reduce the load of insertion work and extraction work on the lower surface of a heavy object W such as furniture, and floor materials such as tatami mats that are widely used in general households can run smoothly. It is possible to change the direction easily while moving the heavy object W such as furniture placed in a stable and safe manner.

1 Cart 2 Body 3 Load receiving platform 4 Caster shaft 5 Roller shaft 6 Roller 7 Caster body 7b Front edge of caster body

Claims (3)

A load receiving platform provided at an upper portion of the main body, a caster main body rotatably supported by a caster shaft at a lower portion of the main body, and a plurality of rollers rotatably supported by a roller shaft at the lower portion of the caster main body And a plurality of the caster shafts are arranged outside a center portion of the load receiving platform and an outer peripheral end of the load receiving platform. 2. The heavy-duty moving carriage according to claim 1, wherein the caster body has a front edge portion in the rolling direction of the roller that is higher than a left and right side edge portion in the roller axial direction with respect to the ground contact surface of the roller. 3. The heavy goods moving carriage according to claim 1, wherein three to five caster shafts are arranged at equal intervals outside the outer peripheral end of the load receiving platform.

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