JPH0672329A - Carriage for track - Google Patents

Abstract

PURPOSE:To provide a carriage for a track additionally used as a flat deck carriage on which a crane is mounted or loading is carried. CONSTITUTION:A wheel on one side is to be a wheel 2 for a track with both flanges to sandwich both side faces of a rail 21 and a floating preventive piece is furnished on a wheel case. A wheel on the other side is formed as a cylindrical flat wheel 3 with length in the axial direction free to absorb change of track width. On a side part on the side with the flat wheel 3 set on a carriage frame 1, a brake device 12 to generate braking force by way of sandwiching the both side faces of the rail 21 and to restrain floating of a carriage is furnished. Consequently, as the wheel 2 for the track is constantly guided by the rail 2 and travels and the flat wheel 3 can absorb change of the track width of the left and right rails, it is possible to travel on a track the width of which greatly changes and possible to attempt efficient use of a site and functions of the carriage for the track.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track truck that is also used as a flat truck on which a crane is mounted or luggage is loaded.

[0002]

2. Description of the Related Art In a large factory or a construction site, a crane is moved using a track laid on the premises,
Materials are transported by flat trucks. Such a track bogie has a structure in which track wheels are provided on a bogie frame to smoothly and stably travel on rails. The raceway wheel generally has a configuration in which flanges that contact the inner surfaces of the left and right rails are provided. The orbital bogie is driven manually or in addition to an electric traveling power unit.

[0003]

When a conventional track truck travels on a curved track, it derails due to the difference in the radius of curvature of the inner and outer rails and the gap between the axles fixed to the track. There was a danger. Therefore, there is a problem that even if a curved track having a radius of curvature smaller than the limit is laid, it cannot be used. Therefore, usually, it is dealt with by slightly widening the track interval of the curved portion, but there is a limit to the countermeasure because of the risk of derailment described above. Therefore, in addition to a straight track on the site, only an oval or circular track with a maximum radius of curvature exceeding the limit can be laid, resulting in effective use of the site and effective use of track trucks. There was a problem that it did not exist.

Therefore, an object of the present invention is to provide a track truck which can be widely used for a track having a large change in track width, especially a track having a small radius of curvature.

[0005]

Means for Solving the Problems As means for solving the above problems, a track truck according to the present invention is a track truck in which wheels travel on a track.
A rail wheel 2 having both flanges 6b sandwiching both side surfaces of the rail 21, and a lifting prevention piece 7a for locking the bottom surface of the flange portion 21a of the rail 21 to prevent the wheel from floating.
Is provided in the wheel case 7, and the wheel on the other side is formed as a cylindrical flat wheel 3 having a length L in the axle direction capable of absorbing a change in track width. A brake device 12 for sandwiching both side surfaces of the rail 21 to generate a braking force and to prevent the truck from rising is provided on a side portion where the flat wheels 3 are installed.

The track truck of the present invention also includes a track wheel 2.
However, it is also characterized in that it is provided with a traveling power unit 4 with a brake.

[0007]

The track wheel 2 is guided to travel by the flanges 6a sandwiching both side surfaces of the rail 21, and the wheel removal is prevented. And the danger of floating is prevented by the lifting prevention piece 7a. The flat wheels 3 absorb the change in the track width of the track and travel without derailing. The braking device 12 generates a braking force while the track truck is stopped and prevents the truck from rising.

[0008]

EXAMPLE An example of the present invention shown in the drawings will be described below.
FIG. 1 is a plan view of a track truck. This track truck is
It is composed of a bogie frame 1, a track wheel 2 arranged on one side of the bogie frame 1, a flat wheel 3 arranged on the other side, and a brake device 12.

As shown in FIG. 2, the track wheels 2 are
A traveling power unit 4 is attached, and a worm wheel 4b that meshes with a worm 4a rotated by a motor 4'with a speed reducer is attached to an axle 5. The wheel case 7 and the rotary bearing 8 are included. The track wheels 2 are
The rails 21 have flanges 6b on both sides of the tread 6a.
The flange 6b is guided to prevent derailment when moving while rotating up. The wheel 2 is connected to the axle 5 with a key 5a. The wheel case 7 not only holds the motor 4'with a speed reducer, the axle 5 and the rotary bearing 8, but also extends the lower surface of the wheel case 7 close to the lower surface of the upper rail flange portion 21a to prevent the wheel from floating. A lifting prevention piece 7a for preventing the rising is provided. The rotary bearing 8 is a thrust ball bearing.

As shown in FIG. 3, the flat wheel 3 includes a wheel frame 9 mounted on the lower surface of the bogie frame 1, an axle 10 mounted on both side wheel support portions 9a, and the axle 10 described above. And a cylindrical body 11 which is rotatably mounted via a radial ball bearing 11b. The cylindrical body 11 does not have a flange. The length L of the cylindrical body 11 in the axle direction is, as shown in FIG. 4, the distance D between the left and right wheels on the straight track and the distance d between the left and right wheels on the curved track.
The width E is sufficiently long to be absorbed.

A brake device 12 is provided on a side portion of the bogie frame 1 on the side where the flat wheels 3 are installed. The brake device 12 shown in FIG. 1 or 4 has contacts 12 arranged on both side surfaces of a rail 21 by rotating a rotary handle 12a.
b is moved to generate a braking force across the rail 21,
Moreover, it is a manual type configuration that prevents the bogie from rising. This prevents a runaway accident and a fall accident while the dolly is stopped. The braking during traveling is performed by the motor 4 that drives the track wheels 2.
It is done by the brake device attached to the. However, there is no reason to limit the brake device 12 to the manual type, and the electric brake device 14 shown in FIG. 5 may be adopted. The brake device 14 includes a compression type coil spring 16
By the pair of contacts 17a and 17b that are configured as a pinching mechanism that always operates in the closing direction by the acting force of the rail 2
It is a configuration in which 1 is sandwiched to generate a braking force. To release the braking, the rotary cam 15 is rotated by a motor with a speed reducer (not shown), and the pair of contacts 17a, 17b is pushed from the inside by a force stronger than the coil spring 16 to open the rail 2.
The contact between 1 and the contacts 17a and 17b is released.

Next, the operation of the track truck will be described. The tower type jib crane 13 shown in FIG. 6 is one of the application examples of the track truck. The track wheel 2 travels on the rail 21 on one side, the derailment is prevented by the flange 6b thereof, and the lift-up prevention piece 7a prevents the lift-up. The truck 4 is driven or braked by the driving force of a motor 4'attached to the orbiting wheel 2. The flat wheels 3 travel on the rails 21 on the other side, and the rails 21 are normally located at substantially the center of the flat wheels 3 (cylindrical body 11). The brake device 12 clamps the rail 21 while the crane 13 is stopped and prevents the crane from rising, but releases the rail 21 from being clamped while the crane 13 is traveling. By the way, when approaching the curved track shown in FIG. 4, the track wheel 2 still travels in the same manner as the straight track with the flange 6b being restrained by the rail 21 and the flat wheel 3 on the other side. It just rotates along a curved trajectory without turning. Flat wheels 3
Has a sufficient axial length L, even if there is a difference E between the distance D between the left and right wheels on the straight track and the distance d between the left and right wheels on the curved track, derailment from the inner rail 21 You can move without doing. As a result, the radius of curvature of the track can be made quite small, and the track can be laid over the entire site.

[0013]

According to the track truck of the present invention, the track wheels 2 always travel while being guided by the rails 21, and the flat wheels 3 can absorb changes in the track widths of the left and right rails. Since it is possible to travel on a curved track with a small radius of curvature where the width changes greatly, the track can be laid along the outer edge of the site quite freely, and effective use of the site and the functions of the track truck can be achieved.

[Brief description of drawings]

FIG. 1 is a plan view of a carriage.

FIG. 2 is a cross-sectional view of a track wheel.

FIG. 3 is a sectional view of a flat wheel.

FIG. 4 is a plan view showing a traveling state of each wheel of the bogie on a curved track.

FIG. 5 is a front view of an electric brake device attached to a bogie frame.

FIG. 6 is a front view of a tower-type jib crane mounted on a trolley.

[Explanation of symbols]

 1 Bogie frame 2 Track wheels 3 Flat wheels 6a Flange 7 Wheel case 7a Lifting prevention piece 12, 14 Brake device 21 Rail 21a Rail flange part

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hisashi Hanada, 4-2-20 Tenjin, Chuo-ku, Fukuoka-shi, Takenaka Corporation Kyushu Branch No. 20 Stock Company Takenaka Corporation Kyushu Branch

Claims (2)

[Claims] 1. A track truck in which wheels run on a track, wherein one wheel is a track wheel having both flanges sandwiching both side surfaces of the rail, and is locked to a lower surface of a flange portion of the rail. The wheel case must be equipped with an anti-floating piece that prevents the wheel from rising.The other wheel is formed as a cylindrical flat wheel with a length in the axial direction that can absorb changes in the track width. That is, in the side portion on the side where the flat wheels are installed in the bogie frame,
A track truck, which is characterized by sandwiching both side surfaces of a rail to generate a braking force and having a brake device for preventing the truck from rising. 2. The track truck according to claim 1, wherein the track wheels are equipped with a traveling power unit with a brake.