JP6244577B1 - Six wheel bogie - Google Patents

Abstract

To develop a six-wheel carriage capable of nesting by raising a fixed caster from a ground surface without changing the overall height of the six-wheel carriage. A base plate 31 is placed on a carriage frame 11 so that it can be raised and lowered, and a connecting member raising / lowering mechanism 90 of a connecting member 15 to which a fixed caster 22 is attached is provided on an upper portion of a rear end member 13 to stand the base plate 31 upright. When the base plate attaching member 32 is rotated, the vertical cylindrical portion 66 of the connecting member 15 is lifted, and the fixed caster 23 is raised by raising the connecting member. With this configuration, when the base plate is erected, nesting can be performed without changing the overall height, and when the base plate 31 is laid down, the fixed caster 23 is lowered to ensure straightness during conveyance. [Selection] Figure 1

Description

The present invention relates to a nestable six-wheel carriage used for transportation and storage of goods.

Conventionally, various mechanisms for raising a fixed caster from a ground contact surface during nesting have been proposed for a six-wheeled vehicle. For example, a free caster lifting mechanism described in Japanese Patent Application Laid-Open No. 11-334602 has been proposed, and when the base plate is raised, the support bar pivot part is pushed downward with the axial projection pivot part as a fulcrum. It is structured to be pushed down with respect to the frame.

Japanese Patent Laid-Open No. 11-334602

As in the above-mentioned Patent Document 1, in a cart that can be nested, the free caster is pushed downward in conjunction with the undulation of the base plate, and as a result, the fixed caster is lifted from the ground surface, and the cart moves as a ground of only the free caster. Although a mechanism that can be freely made and facilitates nesting has been proposed, pushing down the free caster pushes up the entire cart, raising the total height of the cart and occupying a large space. There was a need for a nesting six-wheeled vehicle that does not become large.

In order to solve the above-mentioned problems, the present invention provides a front end member, a rear end member, and a front end member that are arranged in parallel with a predetermined distance therebetween, and is fixed to the upper portion of the front end member, and is connected to the rear end member via a connecting member lifting mechanism. A carriage frame composed of a connecting member having a central member fixed thereto,
A pair of universal casters mounted on the bottom surface of the front end member and the bottom surface of the rear end member, and a pair of fixed casters mounted on the bottom surface of the central member,
Shelf frames respectively attached to the front end member upper part and the rear end member upper part,
A connecting member lifting mechanism that lifts and lowers the connecting member in conjunction with the rotation of the base plate placed so as to be able to undulate;
A six-wheeled carriage equipped with
The connecting member lifting mechanism
A vertical cylindrical portion fixed to the rear end of the connecting member, a vertical guide portion fixed to the upper portion of the rear end member for guiding the inner surface of the vertical cylindrical portion so as to be movable only in the vertical direction,
A pivot shaft that is a pivot of the base plate mounting member of the base plate that protrudes and rotates from the side wall of the vertical tubular portion;
An elevating link that connects a link upper fulcrum provided on the base plate mounting member and a link lower fulcrum provided on the rear end member;
Consists of
The fixed caster is grounded to the floor surface in a state where the base plate is lying down, and by raising the base plate, the connecting member is lifted via the connecting member lifting mechanism, so that the fixed caster is separated from the floor surface. It is configured as described above.

  Further, the present invention provides a diagonal position when viewed from above at the bottom of the shelf frame so that the connecting members of the adjacent front and rear six-wheel carriages can be inserted when nesting the six-wheel carriage with the base plate upright. It is characterized by providing a notched part.

  The present invention also provides a pressing member that swings and fits into a recess of a gear attached to a wheel of a fixed caster of the six-wheel carriage, an operation pedal that operates the wheel in a locking direction, and a wheel lock of the operation pedal. The brake means comprises: a lock pedal for releasing the wheel and a transmission member for transmitting an operation force when the fixed caster is operated in a wheel lock direction and a lock release direction to the brake means.

As is clear from the above explanation, the connecting member with the fixed caster fixed almost at the center lower part is structured to move up and down in conjunction with the rotation of the base plate, so the cart does not become taller, so nesting without changing the occupied space Could make it possible. In addition, by connecting the base plate mounting member and the rear end member in a link, it was possible to add a smooth movement raising / lowering function with few components.

The figure showing the six-wheeled cart at the time of stand-up standing. The figure showing the six-wheeled cart at the time of a board fall. The connection member raising-lowering mechanism figure at the time of a base plate fall down. The connection member raising-lowering mechanism figure at the time of a base plate standing up. Caster position relation diagram at the time of the fall of the stencil. Caster position relationship diagram when the base plate stands. Brake mechanism diagram. FIG. It is a figure of a brake operation part, and represents the time of brake OFF and the time of brake ON. The figure at the time of storing a six wheeled cart nesting.

An embodiment of the present invention will be described with reference to the drawings. 1 and FIG. 2 shows a six-wheeled carriage 1, and a carriage frame 11 is fixed to a front end member 12, a rear end member 13 and a front end member 12 which are arranged in parallel at a predetermined interval, and a rear end member 13 is fixed. A vertical cylindrical portion 66 fitted to the outer periphery of the vertical guide portion 62, a connecting member having a central member 14 fixed to the lower center portion, and a pair of front end member bottom surface 12a and rear end member bottom surface 13a. A universal caster 21 is mounted, and fixed casters 22 are mounted on both sides of the central member bottom surface 14a. A vertical cylindrical shelf frame holding portion 61 is fixed to the center of the upper surface of the front end member 12, and a base portion of the shelf frame 41 is inserted into the inside of the shelf frame holding portion 61 from above and fixed with screws. Further, the end portion of the connecting member 15 is fixed to the shelf frame holding portion 61 of the front end member 12 apart from the upper surface of the front end member 12. As shown in FIGS. 3 and 4, the vertical guide portion 62 is fixed to the center upper portion of the rear end member 13, and the vertical cylindrical portion 66 fixed to the rear end of the connecting member 15 is slid vertically on the outer periphery of the vertical guide portion 62. It is movably fitted. Further, the base portion of the shelf frame 41 is inserted into the vertical guide portion from above and fixed by screws.

On the carriage frame 11, a base plate 31 mounted on a base plate mounting member 32 with a pivot shaft 50 protruding horizontally from the side wall of the vertical cylindrical portion 66 as a fulcrum is placed so as to be raised and lowered. A recess is formed on the lower surface of the base plate 31, and the connecting member 15 is accommodated in the recess when lying down, and the end portions of the base plate rest on the upper surfaces of the front end member 12 and the rear end member 13.

As shown in FIGS. 3 and 4, the base plate mounting member 32 and the rear end member 13 behind the base plate 31 are pivotally supported by the pivot shaft 50 protruding horizontally from the side wall of the vertical cylindrical portion 66 at the rear end of the connecting member 15. A connecting member elevating mechanism 90 is provided therebetween.

The connecting member lifting mechanism 90 includes a vertical cylindrical portion 66 at the rear end of the connecting member 15. The inner surface of the vertical cylindrical portion 66 slides only in the vertical direction on the outer periphery of the vertical guide portion 62 of the rear end member 13. A pivot shaft 50 protrudes horizontally on the outside of the side wall portion of the vertical cylindrical portion 66, and a base plate 31 is attached via a base plate attachment member 32 having the pivot shaft 50 as a pivotal support shaft. Further, in this example, the connecting member lifting mechanism 90 includes a link upper fulcrum 52 on the base plate mounting member 32 that is a rear position of the horizontal pivot shaft 50 when the base plate 31 is lying down, and a horizontal pivot shaft below the connecting member 15. 50, a link lower fulcrum 53 on the rear end member 13 at a slightly forward position is used as both fulcrums, and a lifting link 51 for connecting the base plate mounting member 32 and the rear end member 13 is provided. As the base plate 31 rotates, the link upper fulcrum 52 on the plate mounting member 32 that is separated from the horizontal pivot shaft 50 at the pivot center swings upward and rearward and forward and downward about the pivot shaft 50. Since the link lower fulcrum 53 is located on the rear end member, the vertical cylindrical portion 66 of the connecting member 15 moves up and down the outer wall surface of the vertical guide portion 62 of the rear end member 13 as the link upper fulcrum 52 swings. To slide. That is, the rear end of the connecting member 15 moves up and down, and the fixed caster 22 moves up and down.

Next, the operation of the six-wheeled carriage configured as described above will be described.
When the six-wheel carriage 1 is used, the base plate 31 attached to the base plate attachment member 32 that rotates about the pivot shaft 50 is laid down on the carriage frame 11. At this time, when the base plate 31 is erected, the link upper fulcrum 52 on the base plate mounting member 32 positioned below the pivot shaft 50 rotates rearward and upward to connect the base plate mounting member 32 and the rear end member 13. The link 51 is inclined from the nearly vertical state, and the vertical cylindrical portion 66 at the rear end of the connection part material 15 is lowered downward. As a result, the connecting member 15 to be connected is lowered, and the fixed caster 22 is moved as shown in FIG. It is pushed downward from the lower end surface of the free caster 21. In this state, the carriage becomes a six-wheeled vehicle, and can move in a seesaw shape around the central fixed caster 22 so that the direction can be freely changed.

Next, in order to nest the six-wheel carriage 1, first, the base plate 31 is pivoted upward. At this time, the link upper fulcrum 52 on the base plate mounting member 32 located behind the horizontal pivot shaft 50 at the time of lying down rotates forward and lowers, and the lifting link that connects the base plate mounting member 32 and the rear end member 13. 51 is changed from a tilted state to a nearly vertical state, the vertical end portion 13 to which the rear end member 13 is pushed and the pivot shaft 50 is fixed is pulled upward by the dimension H, and as a result, the connecting member 15 to be connected is lifted. As shown in FIG. 6, the fixed caster 22 is lifted upward from the lower end surface of the free caster 21, and only the four-wheel free caster travels, so that it can move in the free direction, and nesting storage becomes easy as shown in FIG.

Next, the shelf frame 41 will be described. In this example, as shown in FIG. 1, a notch portion 42 is provided below the shelf frame 41 located at the diagonal of the carriage so that the connecting members of the front and rear carriages can enter when nesting to save storage space. Yes.

Next, the brake will be described. FIGS. 7 and 8 are brake mechanism diagrams. The internal gear 25 is processed on the hub of the fixed caster 22, and the pressing member 76 that fits into the internal gear 25 is provided in the wheel holder 23 in the vertical direction. By moving up and down along the hole 24, the pressing member 76 is fitted into the internal gear 25 and the brake is applied or released from the internal gear 25 and the brake is released. The pressing member 76 pushes the brake operating rod 73 forward by depressing the brake pedal 71 disposed on the front end member 12 side, and the brake bracket 74 swings around the brake support shaft 75 attached to the lower surface of the central member 14. Then, the pressing member 76 is pushed upward through the inner member 25 and fitted into the internal gear 25 to lock the wheel.

As shown in FIG. 9, the brake pedal 71 and the release pedal 72 are shifted from each other, and when the brake pedal 71 is depressed, the lock pin 81 attached to the brake pedal 71 becomes a U-shaped key portion 82 attached to the release pedal 72. The entry brake pedal 71 is locked. Further, when the release pedal 72 is stepped on, the U-shaped key portion 82 is pressed to be removed from the lock pin 81 and returned to the original position by the force of the brake pedal spring 86. At this time, the pressing member 76 is returned downward and is released from the internal gear 25 to release the brake.

As another embodiment of the present invention, a gear may be separately mounted in parallel with the fixed caster 22 coaxially.

DESCRIPTION OF SYMBOLS 1 6 wheel bogie 11 trolley | bogie frame 12 front end member 12a front end member bottom face 13 rear end member 13a rear end member bottom face 14 central member 14a central member bottom face 15 connecting member 21 free caster 22 fixed caster 23 wheel holder 24 long hole 25 internal gear 31 base plate 32 Base plate attachment member 41 Shelf frame 42 Notch portion 50 Pivoting shaft 51 Lifting link 52 Link upper fulcrum 53 Link lower fulcrum 61 Shelf frame holding portion 62 Vertical guide portion 66 Vertical cylindrical portion 71 Brake pedal 72 Release pedal 73 Brake operation杆 74 Brake bracket 75 Brake support shaft 76 Press member 77 Press spring 81 Lock pin 82 U-shaped key part 83 Brake pedal shaft 84 Release pedal shaft 86 Brake pedal spring 87 Release pedal spring 90 Connecting member lifting mechanism H Vertical movement distance

Claims (3)

A carriage comprising a connecting member in which a front end member, a rear end member, and a front end member upper part fixed to each other at a predetermined interval are fixed to each other and connected to the rear end member via a connecting member lifting mechanism, and a central member is fixed to a lower center part. Frame,
A pair of universal casters mounted on the bottom surface of the front end member and the bottom surface of the rear end member, and a pair of fixed casters mounted on the bottom surface of the central member,
Shelf frames respectively attached to the front end member upper part and the rear end member upper part,
A connecting member lifting mechanism that lifts and lowers the connecting member in conjunction with the rotation of the base plate placed so as to be able to undulate;
A six-wheeled carriage equipped with
The connecting member lifting mechanism
A vertical cylindrical portion fixed to the rear end of the connecting member, a vertical guide portion fixed to the upper portion of the rear end member for guiding the inner surface of the vertical cylindrical portion so as to be movable only in the vertical direction,
A pivot shaft that is a pivot of the base plate mounting member of the base plate that protrudes and rotates from the side wall of the vertical tubular portion;
An elevating link that connects a link upper fulcrum provided on the base plate mounting member and a link lower fulcrum provided on the rear end member;
Consists of
The fixed caster is grounded to the floor surface in a state where the base plate is lying down, and by raising the base plate, the connecting member is lifted via the connecting member lifting mechanism, so that the fixed caster is separated from the floor surface. A six-wheeled carriage characterized by being configured as described above.   When nesting a six-wheel carriage with a stand plate up, a notch is provided at the bottom of the shelf frame at a diagonal position so that the connecting members of the adjacent front and rear six-wheel carriage can be inserted. The six-wheeled carriage according to claim 1, wherein:   A pressing member that swings and fits into a recess of a gear attached to a wheel of a fixed caster wheel of the six-wheel carriage, an operation pedal that operates the wheel in a locking direction, and a lock pedal that releases the wheel lock of the operation pedal; 2. A six-wheel carriage according to claim 1, further comprising: brake means comprising transmission members that transmit operating force to the brake means when the fixed casters are operated in a wheel locking direction and a lock releasing direction.

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