JP2586340Y2 - Arm to prevent falling of truck - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a minecart that runs on rails, and its main purpose is to prevent a work tower installed on a base plate from overturning.

[0002]

2. Description of the Related Art In a minecart having a tower T installed on a base plate, the height of the tower is limited so that the trolley does not fall down even on a line with a cant α. Nevertheless, when heavy objects were brought into the tower, or when the operator leaned out of the building to the side, an over-displacement of the center of gravity caused an accident.

[0003]

A swing arm is provided on each of the left and right sides of a trolley base plate, and this arm is used to hold the rail web before stopping the trolley and proceeding to work. In order to secure the holding, a permanent magnet is fixed at the contact point with the web. In order not to disturb the signal current system by the arm, the arm is vertically divided into two and an insulating plate is interposed therebetween.

[0004]

1 and 2, the arm of the present invention comprises an upper member 1, a lower member 2, an intermediate insulating member 3, and two connecting members 4, 4 for connecting the insulating member 3 to upper and lower members. As shown in FIG. 3, the end of the upper member 1 is pivotally connected to a shaft 5 fixed to the side of the trolley plate B. The lower member 2 is a fishhook-like curved body, and a permanent magnet M is fixed to a contact portion so as to hold the web of the rail R. The insulating member 3 is a pair of plate-like members, and both ends thereof are fixed to the connection members 4 and 4 on the upper and lower member sides, respectively, and the whole is formed into a single rod-like member.

During running, the arm is lifted upward. When it stops at the work site, it is tilted down to attract the magnet M to the rail.

[0006]

[Effect of the invention] This arm is used to stop a truck on a track, and to carry out lifting and lowering of a person and loading / unloading of cargo. The arm on one side or both sides is used in consideration of whether the line is cut, the height of the center of gravity of the truck, and the degree of the unbalanced load. When the arm is swung about the upper end pivot point, the lower end curved portion holds the web, and the permanent magnet maintains this state. Therefore, even if the center of gravity is increased or the degree of the unbalanced load is increased, there is no case where the center of gravity is well tolerated and falls down easily. This is the effect. When starting to run, the arm is separated from the web against the magnetic force and locked upward. Since the arm is provided with an insulating member, the signal current is not disturbed.

[0007]

[Brief description of the drawings]

FIG. 1 is a front view of an arm.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the minecart on which the arm is mounted.

[0008]

[Explanation of symbols]

 Reference Signs List 1 upper member 2 lower member 3 insulating member 4 connecting member 5 axis M magnet T tower R rail

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-77720 (JP, A) JP-A-55-36145 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B61F 9/00 B61D 9/10 B61D 15/00 B61F 5/38 B61F 13/00

Claims (1)

(57) [Scope of request for utility model registration] At the center of the front and rear wheels of the trolley, one end is pivotally attached to the trolley base plate, the other end is curved and a permanent magnet is fixed so as to be able to hold the web of the left and right rails, and the middle part is insulated. An overturning arm for a minecart with a plate interposed.