JPS6126230Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hatch cover device for a powder tank transport vehicle, etc., and in particular, all the fastening members that are engaged with the locking members provided around the opening on the tank side are connected to the hatch cover side. After installing and opening the hatch cover, make sure that no fastening members remain around the opening.
In addition, even if pressurized air remains inside the tank and a vertical external force is applied from the inside of the tank to the hatch cover side, the fastening members are arranged so that the fastening members on the hatch cover side are engaged with the locking members on the tank side. This invention relates to a hatch cover device that prevents the hatch cover from opening.

For example, a powder tank carrier pulled by a trailer has a hatch cover attached to the entrance/exit where powder is filled and inspected. FIG. 1 is a plan view of such a powder tank carrier 1. To briefly explain this, a tank structure 4 for storing powder is attached on a tank frame 3 at the rear to which wheels 2 are attached. A towing king pin 6 that engages with a portion of a trailer (not shown) is installed in the front tank frame 5. On the other hand, a hatch cover 7 for opening and closing the opening filled with powder is attached to the upper part of the tank structure 4 so as to be horizontally rotatable about a shaft 8. A fastener 9 is attached to the locking member around the opening to maintain the closed state. On the other hand, fasteners for holding the hatch cover 7 may also be provided around the opening.

By the way, in such a conventional hatch cover device, when the hatch cover 7 is opened and horizontally rotated about the shaft portion 8, if a fastener is also provided around the opening, this fastener will be removed. remains around the opening on the tank structure 4, and the rotation locus of the fastener 9 of the hatch cover 7 has a small dimension that engages with the lower part of the locking member around the opening.
This caused accidents such as the powder insertion canvas around the opening being caught and damaged, and the hatch cover suddenly opening due to the pressurized air remaining in the tank, causing people to be thrown away. .

The present invention was developed in view of these conventional problems, and all fasteners that were conventionally attached to the tank side and the hatch cover side are attached to the hatch cover side, and the rotation trajectory of these fasteners is By providing this at a position that engages with the lower part of the locking member around the opening, it is possible to prevent damage or breakage of the powder insertion canvas attached around the opening, and also prevent the inside of the tank from being damaged. To provide a hatch cover device for a powder tank transport vehicle, etc., which prevents personal accidents caused by being blown off by a hatch cover that is suddenly opened due to pressurized air remaining in the powder tank.

An embodiment of the present invention will be specifically described below with reference to the drawings.

2 and 3 are a plan view and a sectional view of the main parts of the hatch cover device of the present invention. In the figure, reference numeral 11 denotes a tank structure of a powder tank carrier, and around an opening provided in the upper part of this structure, there is a cylindrical body 12 integrally having a ring-shaped collar 12a serving as a locking member at the upper part. A bracket 13 fixed to the hatch cover 22 is disposed so as to face the cylindrical body 12 and face it. Support shafts 14 and 15 are stretched around these brackets 13, and the vicinity of the end of the handle 16 is pivotally supported on the support shafts 14. Additionally, a fourth
As shown in the figure, one end of the link 17 is pivotally supported by a shaft 18, and the other end of the link 17 is pivotally supported by one end of a retaining plate 19 by a shaft 20. This holding plate 19 is rotatably supported by the support shaft 15 of the bracket 13, and the end of an adjustment screw 21 screwed into the other end of this holding plate 19 is engaged to support the lower surface of the collar 12a. ing. On the other hand, the support bracket 13 is attached to a hatch cover 22 that covers the opening at the upper end of the cylindrical body 12, and the collar 12a of this hatch cover 22
In the recess 23 facing the seal packing 2
4 is installed. Fastening members A having such a structure are provided at three locations around the hatch cover 22. Further, as shown in FIG. 2, one end of an arm 25 is fixed to one location on the circumferential side edge of the hatch cover 22, and the other end of this arm 25 is rotatably attached to a shaft portion 26 on the tank 3. . What is important here is that the adjustment screw 21 of each fastening member A
is provided on a rotation locus that passes below the collar 12a at the top of the cylinder 12 when it rotates in the direction of the arrow X about the shaft portion 26. That is, the handle 16 is rotated about the shaft 14 to the chain line position in FIGS. 3 and 4, and the link 17 is rotated.
When the holding plate 19 is rotated in the direction of the arrow and the adjustment screw 21 is disengaged from the flange 12a, and the arm 25 is rotated in the X direction, the adjustment screw 21 is inserted into the opening. It is arranged so that it passes below the collar 12a without contacting the circumferential surface of the cylindrical body 12 up to the line connecting the center and the center of the shaft 14. In this case, any one of the fastening members A may be provided at an offset position if necessary.

The present invention has three fastening members, and all of these fastening members are provided around the hatch cover, and when the hatch cover is moved horizontally around the shaft, two of the fastening members are attached to the opening. It is characterized in that it is arranged around the hatch cover so that even if it rotates to a line connecting the center and the center of the shaft part, it passes below the locking member around the opening.

This configuration has the following effects.

Three fastening members are attached to all the hatch covers, so when the hatch cover is opened, each fastening member moves together with the hatch cover, and no fastening members remain around the tank opening, which helps guide the filling. Canvases, etc., are not caught on the fastening member, and damage to the canvas or the like can be prevented.

Since two of the fastening members are positioned so that they pass under the locking members around the opening when the hatch cover is moved horizontally, even if pressurized air remains inside the tank and a vertical external force acts on the hatch cover side from the inside of the tank, the fastening members are caught by the locking members and the hatch cover does not jump up. Therefore, it is possible to prevent accidents such as people being thrown off by the hatch cover that is suddenly opened by the pressurized air and causing personal injury, etc.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the powder tank carrier, Fig. 2 is a plan view of the hatch cover in the present invention, Fig. 3 is a side sectional view of the same main part, and Fig. 4 is the main part showing the lock structure of the hatch cover. FIG. 11... Tank structure, 12... Cylindrical body, 12a
... Locking member, 22 ... Hatch cover, 25 ...
Arm, 26... shaft portion, A... fastening member.

Claims (1)

[Scope of utility model registration request] A hatch cover that opens and closes an opening provided in the tank structure is provided with a plurality of fastening members that are fastened to the locking members around the opening and an arm that rotates around a shaft, and the shaft is In the hatch cover device that horizontally moves the hatch cover as the center, there are three fastening members as described above, all of these fastening members are provided around the hatch cover, and when the hatch cover is moved horizontally around the shaft part, each of the above fastening members is provided. It is characterized by being arranged around the hatch cover so that even if two of the members rotate to a line connecting the center of the opening and the center of the shaft, they will pass below the locking member around the opening. Hatch cover device.