JP3007902B2 - Pushed carrier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push cart for carrying heavy loads.

[0002]

2. Description of the Related Art Referring to FIG. 1, this type of push-type carrier has wheels 2 attached to the front and rear sides of a back surface of a luggage carrier 1 and a downward U-shape on the rear surface of the luggage carrier 1. It is a configuration in which a push rod 3 in the shape of is provided.

[0003] In this hand-held type transport vehicle, a braking mechanism is conventionally provided on the wheels 2 because it is dangerous to move unnecessarily. This braking mechanism performs a braking action by a human operation when it is not necessary to move the carrier such as when loading or unloading luggage. That is, the carrier can move freely at all times.

[0004] However, being able to move at all times is extremely dangerous because if the braking operation is forgotten, the transport vehicle may run by itself. For example, when the hand is suddenly released on a sloping ground, such a risk is likely to occur. At this time, if the luggage is loaded, the danger further increases.

Under these circumstances, Japanese Utility Model Application Laid-Open No. 6-6057.
Japanese Patent Application Laid-Open No. 6-64106 discloses a hand-held carrier that constantly brakes and releases the braking by a lever. With this technology, there is no risk that the truck will suddenly run on its own.

[0006]

In the technique described in the above-mentioned publication, the operation of the lever is not so related to the gripping of the push rod (the operation at the time of transportation), so that the operation is troublesome. .

Further, the brake mechanism presses the pad against the rubber portion of the outer ring of the wheel. Therefore, the outer ring made of rubber wears out as it is used, which tends to hinder the braking action and also increases the running performance. Problems arise.

A first object of the present invention is to release the braking naturally simultaneously with the carrying operation, and a second object is to stabilize the braking operation and improve the durability of the wheels. .

[0009]

In order to solve the above-mentioned first problem, the present invention relates to a push-type carrier described above.
Means for constantly pressing and contacting the wheels are provided for braking, and a brake release rod along the upper side of the push rod is provided so as to be freely movable up and down, and this brake release rod requires human labor when pushing the transport vehicle. The braking release rod is always urged in a direction away from the horizontal rod, and the downward movement against the urging force releases the braking means to allow the wheels to roll freely. This is the configuration .

With this configuration, when moving (moving) the transport vehicle, if the lateral lever of the pushing rod is gripped via the braking release rod, the braking release rod moves downward to release the braking. Drive in this state. At this time, since the brake release rod extends to a position where manual operation is required, the brake release rod is naturally gripped when the horizontal rod is gripped, and a downward movement action is performed. When the vehicle travels to the desired position and releases the hand from the horizontal rod, the brake release rod returns and the braking action is performed. For this reason, the transport vehicle does not move unnecessarily.

A means for solving the second problem is to perform a braking action by bringing a pad into and out of contact with a rim of a wheel. At this time, the pad is provided on the back surface of the mounting table so as to be vertically swingable. The brake is provided on the swinging rod, and is constantly pressed against the rim of the wheel by an extended spring provided between the swinging rod and the mounting table to perform a braking operation. is connected to the mounting table back surface of the rotating shaft, provided with actuating rod to slide in contact with the swing rod to the rotary shaft, the downward movement of the brake release rod, the link, the rotary shaft, the operating member The swaying rod is depressed and oscillated downward through the pad to separate the pad from the rim .

[0012] In this case, since the braking action is performed by the pressure contact between the rim and the pad, damage to the wheels is minimized. When the grip is released, the brake release rod is naturally returned by the spring, and the pad is pressed against the rim by the spring, so that the braking action is naturally performed. Further, since the swinging rod and the operating rod are only in contact with each other, they are separated from each other except at the time of pressing. By this separation, a manufacturing error of both is absorbed, and the operation is smoothly performed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment is shown in FIGS. 1 to 4. The basic structure is the same as that of the prior art. Is provided with a downward U-shaped push rod 3.

The horizontal release rod 3a of the push rod 3 is provided with a brake release rod 4 along the upper side thereof so as to be vertically movable via support rods 4a at both ends. It is assumed that the length of the release rod 4 extends to a position where manual operation is required when pushing the transport vehicle. Support 4
a penetrates the horizontal rod 3a and the Y-link 5a of the link mechanism.
At both ends. Y-shaped link 5a is mounting table 1
The link 5b is flexibly connected to the link 5b on the back surface, and the link 5b is fixed to the rotating shaft 6 on the back surface of the mounting table 1 as shown in FIG. Therefore, the vertical movement of the release rod 4 is transmitted to the rotary shaft 6 as a rotational force via the link mechanism.

An operating rod 7 is fixed to both ends of the rotating shaft 6, and a swinging rod 9 having a pad 8 is
It is slidably contacted through a. Both swinging rods 9 are supported at one end by wheel legs 2c, which will be described later, so as to be vertically swingable.
The other end is connected by a connecting rod 9a. Connecting rod 9a
Is urged upward by an extended spring 10 provided on the back surface of the mounting table 1, whereby the swinging rod 9 swings upward, and the pad 8 comes into pressure contact with the inner surface of the rim 2 a of the wheel 2. ,
The unreasonable rolling of the wheel 2 is prevented.

The wheel 2 is of a well-known type in which a hard rubber ring 2b is fixed to the outer peripheral surface of a rim 2a, and is attached to the back surface of the mounting table 1 by a U-shaped leg 2c which supports the wheel 2 by sandwiching the wheel 2 from both sides. . The pad 8 uses a well-known braking member such as rubber. The swinging rod 9 is swingably provided on an inner support of the leg 2c.

In the push-type carrier constructed as described above, the pad 8 is always connected to the rim 2 via the swinging rod 9 by the spring 10.
a is pressed against the inner surface and is braked (see FIG. 3), and does not move unnecessarily unless a considerable force is applied.

In this state, if the user grips the horizontal rod 3a, for example, by placing a load, the release rod 4 is naturally grasped and pushed down, and the rotating shaft 6 is moved through the link mechanism as shown by the arrow in FIG. The swinging rod 9 also swings downward as indicated by the arrow, the pad 8 separates from the rim 2a, and the braking is released (see FIG. 4). Drive in this state.

When the user travels to the required position and releases his / her hand from the horizontal rod 3a, the pressing force of the release rod 4 is also released, and the swinging rod 9 swings in the direction opposite to the arrow by the urging force of the spring 10 so that the pad 8 moves. Is pressed against the rim 2a, and the rolling of the wheel 2 is prevented. That is, the braking action is automatically performed, and the load is dropped in this state.

[0020]

The present invention is configured as described above.
The braking is naturally released in accordance with the running operation, and if the vehicle stops, the braking is naturally performed and a deviant movement is prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment.

FIG. 2 is a perspective view of a main part of the embodiment.

FIG. 3 is a diagram illustrating the operation of the embodiment.

FIG. 4 is an operation explanatory view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Luggage mounting stand 2 Wheel 2a Wheel rim 3 Pushing rod 3a Horizontal rod 4 Brake release rod 6 Rotating shaft 7 Operating rod 8 Brake pad 9 Oscillating rod 10 Spring

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-207786 (JP, A) JP-A-59-171756 (JP, A) JP-A-5-238393 (JP, A) 82743 (JP, U) JP-A 57-48184 (JP, U) JP-A 7-31560 (JP, U) JP-A 3-55372 (JP, U) JP-A 50-13657 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62B 5/04 B60T 1/06

Claims (1)

(57) [Claims] 1. A attached to the rear surface both front and rear sides of the luggage table 1 the wheel 2, the set a downward U-shaped push rod 3 on the surface rear luggage table 1 only, constantly pressed before SL wheel 2 brake provided with a means for, prior Symbol press provided brake release lever 4 along its upper laterally rod 3a of lever 3 vertically movably, the brake release lever 4, the horizontal rod 3a which manpower is applied when pressing the trucks The braking release rod 4 is always urged in a direction away from the horizontal rod 3a, and the downward movement against the urging force releases the braking means and the wheels 2 roll freely. a door name Ru hand押式truck, putting on Symbol braking means, approaching and moving away from the rim 2a of the wheel 2 8
The pad 8 is placed on the back of the mounting table 1 in the vertical direction.
The oscillating rod 9 is provided so as to be freely oscillated, and is constantly pressed against the rim 2a of the wheel 2 by a spring 10 in an extended state provided between the oscillating rod 9 and the mounting table 1 to perform a braking action. The brake release rod 4 is connected to a rotary shaft 6 on the back surface of the mounting table 1 via links 5a and 5b, and the operating rod 7 slides on the rotary shaft 6 by contacting the swinging rod 9. And the downward movement of the braking release rod 4 causes the swinging rod 9 to be pressed and swinged downward via the link, the rotating shaft 6 and the operating rod 7 to separate the pad 8 from the rim 2a. A hand-operated transport vehicle.