JPS6129672Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention particularly relates to a side-opening type rear door closing device for large tank cars.

Generally, in this type of large tank car, the rear door of the tank body is pivotally attached to the tank body via a hinge of an appropriate means so that it can be opened freely, and the flange portion of the rear door is connected to the tank via a sealing member embedded in the outer circumferential surface of the rear door. It is crimped to the flange of the main body. By the way, the rear door is tightened by tightening a large number of bolts arranged at equal positions on the circumference of the rear door, but since this type of rear door is heavy, it is difficult to open and close it. During operation, the rear door bends downward, making it difficult to completely close the flange portion of the rear door to the flange portion of the tank body, making it difficult to tighten the door.

The present invention is an improvement on the conventional tank car rear door closing device in view of the above-mentioned drawbacks.The construction of this invention will be described below with reference to an embodiment shown in the drawings.

In Figures 1 to 5, 1 is the chassis of a large tank truck, 2 is the tank body mounted on the chassis 1, and 3 is the tank body mounted on the chassis 1.
is a rear door which is pivoted to a fixed position of the rear opening of the tank body 2 via a hinge 4 of suitable means so as to be horizontally openable and closable. 5 is the rear door 3 and the tank body 2
This is a closing device arranged symmetrically with the hinge 4 at fixed positions on both inner circumferential walls of the hinge. 6 is a sealing member interposed between the flange portion 2a of the tank body 2 and the flange portion 3a of the rear door 3;
It is embedded and fixed in a groove (not shown) protruding from the circumferential surface of a. Next, to explain the specific structure of the closing device 5, 7 is a guide plate fixed by appropriate means at a fixed position on the inner circumferential wall of the opening of the tank body 2, that is, at a position approximately symmetrical to the hinge 4. A first tapered surface 7a is formed on the upper surface of the tank body 2, and the rear end portion is configured not to protrude outward from the outer peripheral surface of the flange portion 2a of the tank body 2. Reference numerals 8, 8 indicate upper and lower mounting boards arranged side by side at predetermined intervals at predetermined positions on the inner circumferential wall of the rear door 3, and a presser member 9 is interposed at the predetermined positions. Reference numeral 10 denotes an engagement arm which is tightened and fixed between both side edges of the upper and lower mounting boards 8, 8 with bolts 11, etc., and has an engagement arm on the lower surface of its tip corresponding to the first tapered surface 7a of the guide plate 7. 2, and the engaging arm 1 has a tapered surface 10a.
0 is guided by a holding member 9 to face the opening of the tank body 2 in the front from the flange 3a of the rear door 3, and its second tapered surface 10a is placed facing the upper surface of the guide plate 7. Guide plate 7 of the closing device 5
The engagement arm 10 is preset and arranged in a position where the center of the tank body 2 and the center of the rear door 3 coincide, that is, the flange portion 2a of the tank body 2 and the flange portion 3a of the rear door 3 are completely closed. ing.
In the drawing, reference numeral 12 denotes a large number of bolts for tightening the rear door 3, which are arranged at equal positions on the circumferential surface of the rear door 3.

In closing the rear door 3, the rear door 3 is rotated about the hinge 4 along the door closing direction. At this time, the rear door of a large tank car is heavy, so when it is opened, it bends slightly downward due to its own weight. In the present invention, the guide plate 7 and the engagement arm 10 are disposed in a fixed position on the inner circumferential wall of the opening of the tank body 2 and in a fixed position on the inner circumferential wall of the rear door 3, facing each other in the manner described above. When the rear door 3 is rotated in the door closing direction, the engagement arm 10 of the rear door 3 first comes into contact with the guide plate 7 fixed to the inner circumferential wall of the opening of the tank body 2. At this time, the guide plate 7
And since the first and second tapered surfaces 7a and 10a are formed on the opposing surfaces of the engagement arm 10,
As the engagement arm 10 of the rear door 3 rotates, it is pushed diagonally forward and placed on and engaged with the upper surface of the guide plate 7. As described above, the engagement position of the guide plate 7 and the engagement arm 10 is set in advance at a position where the center of the tank body 2 and the center of the rear door 3 coincide, so that the engagement position of the engagement arm 1
When 0 is placed on the upper surface of the guide plate 7, the centers of both will naturally coincide. Therefore, even if the rear door 3 bends downward due to its own weight, by rotating the rear door 3 in the closing direction in this state, the center of the rear door 3 can be immediately aligned with the center of the tank body 2. The flange portions 2a and 3a can be completely closed. After that, bolts 12 arranged at equal positions on the circumferential surface of the rear door 3 are tightened to secure the rear door 3 to the opening of the tank body 2.

As explained above, this invention is based on a tank car in which a disk-shaped rear door is pivotally attached to the opening of the tank body at a fixed position via a hinge so that it can rotate horizontally. A guide plate having a first tapered surface is fixed to the inner circumferential wall of the opening of the tank body at a position symmetrical to the hinge of the rear door, and the guide plate is fixed to the inner circumferential wall of the rear door at a position symmetrical to the hinge of the rear door. Since the engaging arm having the second tapered surface that joins with the first tapered surface of the tank body is arranged to face the rear door so that the center of the rear door and the center of the tank body coincide with each other, when the rear door is closed, the rear door bears its own weight. By rotating the rear door in the closing direction in this state even when the rear door is bent downward, the engagement arm of the rear door is placed and engaged with the upper surface of the guide plate of the tank body, and the center of the tank body is and the center of the rear door, and both flanges can be easily and completely closed. Therefore, the rear door can be tightened easily and reliably, and work efficiency can be improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of the rear door closing device for a tank car according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged perspective view of its main parts, and Fig. 4 is an enlarged plan sectional view of its main parts. , FIG. 5 is an enlarged front sectional view of the main part. 2... Tank body, 3... Rear door, 2a, 3a
...Flange portion, 5...Closing device, 7...Guide plate, 10...Engagement arm, 7a, 10a...First
and a second tapered surface.

Claims (1)

[Scope of utility model registration request] In a tank car in which a disk-shaped rear door is pivotally attached to a fixed position of an opening of a tank body through a hinge so as to be rotatable in a horizontal direction, the opening of the tank body is located at a symmetrical position of the hinge of the rear door and the opening of the tank body. A guide plate having a first tapered surface is fixed to the inner circumferential wall of the portion, and
At a position symmetrical to the hinge of the rear door and on the inner peripheral wall of the rear door, an engagement arm having a second tapered surface that joins the first tapered surface of the guide plate is connected to the center of the rear door and the tank body. A rear door closing device for a tank car, characterized in that the rear door closing device for a tank car is arranged facing each other so that the centers of the two sides coincide with each other.