JPH0732315Y2 - Brake device for hand truck - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a hand truck for trucks such as trolleys, in which the wheels of the truck are constantly braked by spring action, and are braked only when the truck is moved by hand movement. The present invention relates to a brake device for a hand cart that is released.

[Prior Art] Conventionally, a hand truck using a braking device is known. For example, there are Japanese Utility Model Publication No. 15-6402 and Japanese Utility Model Publication No. 54-15372.

[Problems to be Solved by the Invention] In the braking device disclosed in the formerly known former Japanese Utility Model Publication No. 15-6402, a brake is pivotally attached to one of the bell cranks and a brake lever is received on the other. Is provided and a braking lever is fitted to the receiver to perform manual braking and braking release.This means is a braking device for the purpose of decelerating or stopping, and in this case, when loading and unloading luggage. Can not work alone because it is dangerous unless the wheels of the truck are braked by appropriate means.

In addition, the latter Japanese Utility Model Publication No. 54-15372 discloses a structure in which, in order to solve the above-mentioned drawbacks, braking is always given by the urging force of the spring while stopped, and the braking is released when pushed. The mechanism is located on the outside of the wheels, and the dolly that runs on the track is often used for night work.
Therefore, the presence of the braking mechanism on the outside of the wheel causes a danger. Also, this trolley can only be used on the outward trip. That is, since the braking is released by pushing the truck, the direction of the truck must be changed on the orbit when returning to the loading position after carrying the luggage by the truck. Therefore, it is troublesome. Further, even if the direction is changed, the walkway when pushing the cart is pushed while walking at the position where the pebbles are laid, and the walkway is not organized, which is dangerous in the nighttime work described above.

Therefore, there is a demand for improvement also in this respect.

[Means for Solving the Problem] In view of such circumstances, the present invention has been improved to solve the problem, and the braking can be released while pushing from any side without changing the direction, thereby eliminating the trouble. For that purpose, yet another purpose is to use a well-organized walking path. That is, one connecting cylinder to which handlebars can be attached and detached is attached to the front end and the rear end of the bogie so that one of the connecting cylinders is swingably supported on the upper side and the other is the lower side, and both connecting cylinders are positioned corresponding to the wheels. Are connected to the lower end, and the middle part is connected to the upper end of the movable plate pivotally supported on the trolley via connecting rods.The movable plate is urged toward the wheel in the pressing direction. It uses a coil spring to make the brake element always press and brake the wheel while it is stopped by the coil spring, and when moving, the brake is released by pushing the handle rod pressed against one of the connecting cylinders, and the truck is It is pushed and moves, and the braking action of the brake can be released by pushing either one through the handle rod provided with the connecting cylinder connected to the movable plate equipped with the brake before and after the carriage, and The carriage does not change its direction It's that. In addition, the braking mechanism is located inside the wheels to prevent danger during work.

[Embodiment] Next, an embodiment of a braking apparatus for a hand truck according to the present invention will be described with reference to the drawings.

Reference numeral 1 is a foldable vehicle from the center, and this trolley 1 is arranged so that wheels 2 with a collar are arranged at the front and the rear so that it can be pushed and run on a rail R laid.

On the carriage 1, a brake element 3 which can be brought into and out of contact with one of the wheels 2 on one side and corresponding to the collar 2a of one of the front and rear wheels is located. The brake shoe 3 is pivotally supported by a pin 7 on the lower side of a movable plate 6 in which an intermediate portion is pivotally supported by a shaft 5 on a shaft support piece 4 mounted on the trolley 1 side. Therefore, the brake shoe 3 is brought into contact with or separated from the corresponding brim 2a by swinging the movable plate 6.

Both ends of the movable plate 6 above the shaft 5 are bent outwardly, and one of the bent pieces 6a, 6b locks the other end of the tension coil spring 8 having one end locked to the carriage 1. The coil spring 8 swings the movable plate 6 about the shaft 5 to urge the brake element 3 toward the wheel 2.

Further, the bending piece 6a is connected to an upper side of a connecting cylinder 10 whose one end side of the carriage 1 is pivotally supported by a shaft 9 at one end side thereof via a connecting rod 11. Further, the other bending piece 6b is connected via a connecting rod 15 to a lower side of a connecting tube 14 whose upper side is pivotally supported by a shaft 13 to a shaft supporting piece 12 attached to the other end side of the carriage 1. .

In addition, the connection cylinders 10 and 14 are designed such that the handle rod 16 can be attached and detached according to the convenience of moving the carriage 1.

[Operation] As is apparent from the above-described configuration, the folded truck 1 is unfolded and placed on the rail R for traveling. In this case, when the truck 1 is stopped, the wheels 2 are associated with the corresponding brake elements 3. Is pressed by the coil spring 8 to brake the wheel 2 for loading or unloading, and when the carriage 1 is to be moved, the connection provided on the rear side in either direction of movement. By inserting the handle rod 16 into the cylinder 10 or 14, and pushing the handle rod 16, the connecting cylinder 10 or 14 swings the movable plate 6 through the connecting rod to resist the coil spring 8 and the brake 3 Is released from the wheel 2 to release the braking, while the truck 1 is pushed and moves. Further, on the return path returning from this moving position, the handle rod 16 that has been inserted into the connecting cylinder can be removed and replaced with the connecting cylinder 14 or 10 so that the direction of movement can be changed without changing the direction of the carriage 1. . Further, unlike the conventional case where the direction of the carriage 1 is changed, there is no trouble. In addition, since the reciprocating path when pushing the trolley is the same organized path, it is easy to walk and there is no danger.

Further, when there is a slope when traveling or when it is desired to stop suddenly, the handle can be pulled to give a strong braking force to the brake element to prevent danger.

[Effects] According to the present invention, as described above, the brake element pivotally supported at the lower end of the movable plate is positioned corresponding to the wheel of the trolley, and the brake element is pressed against the coil spring for pressing and braking toward the wheel. Since the connecting cylinders that release the braking are provided at the front and rear of the bogie, the bogie is always braked by the urging force of the coil spring while the bogie is stopped, and is safe because it does not move during loading and unloading. Is.

For further movement, pushing the connecting cylinder in the moving direction through the handle rod releases the pressing of the brake element, and pushing this handle rod causes the carriage to move. Further, since the connecting cylinders are provided at both the front and rear ends of the bogie, unlike the conventional bogie, there is an effect that the bobbin can be moved as it is without changing the direction of the bogie, which is troublesome.

[Brief description of drawings]

1 is a plan view, FIG. 2 is a side view, and FIG. 3 is an enlarged side view of essential parts. 1 ... carriage, 2 ... wheels, 2a ... tsuba, 3 ... brakes, 4,
12 ... Shaft support, 5,9,13 ... Shaft, 6 ... Movable plate, 6a, 6b ...
… Bending piece, 7 …… pin, 8 …… coil spring, 1
0,14 …… Connection cylinder, 11,15 …… Coupling rod, 16 …… Handle rod

Claims (1)

[Scope of utility model registration request] 1. A trolley having front and rear wheels arranged to travel along a rail, wherein an intermediate portion is swingably supported by a shaft support piece from the trolley inside the front or rear wheel or one of the wheels. The brake element pivotally supported by the pin is positioned at the lower end side of the movable plate, and the upper and lower ends of the left and right ends of the movable plate are axially supported by the axial support piece provided at one end side of the carriage. The lower end of the connecting cylinder and the other end of the upper end of the movable plate are connected to the upper side of the connecting cylinder whose lower part is pivotally attached to the other end of the trolley via connecting rods, respectively. , A coiled spring having one end locked to the trolley side and the other end locked to urge the brake element pivotally supported on the lower end side of the movable plate toward the wheel to press the wheel. Braking device.