JPH0144468Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention a. Industrial application field This invention relates to an improvement of a manhole opening/closing device for a urine sprayer.

b. Prior Art As shown in FIG. 5, in a conventional manhole opening/closing device, one end of the opening/closing member 3 to which the lid 2 is connected is pivoted to a shaft 4 so as to be freely openable and closable with respect to the bracket 1A of the manhole 1. The other end 3A has a notch (not shown) in plan view, a bracket 5 is fixed to the manhole 1 directly below the other end 3A of the opening/closing member, a threaded rod 6 is pivotally supported on the bracket 5 about the shaft 5A, The threaded rod 6
By engaging the other end 3A and rotating and tightening the handle 6A, the lid 2 is firmly covered over the manhole 1.

C Problems that the invention aims to solve However, in such conventional manhole opening/closing devices, excrement and urine adhere to the threaded parts and rust, causing the handle 6 to become rusty.
A stops spinning.

Manure and urine are frequently put into the tank 7 from the manhole 1 using a slurry pump, but the lid cannot be opened and closed quickly.

There were other problems.

B. Structure of the invention a Means for solving the problem The present application attempts to solve the above-mentioned problem with the following structure. That is, in the present application, an arm 10 is rotatably attached to the tip of the opening/closing member 3 using a support shaft 11, and a hook 13 that engages and disengages from an engagement piece 12 provided on the tank is screwed into a nut 14. The nut 14 is also rotatably mounted.

b. Example of the invention The present invention will be explained below based on an example shown in the drawings.

V is a urine dispersion machine, and to explain the main parts of this project using Figures 1 to 4, 7 is a tank and above it is a urine sprayer
is provided. Reference numeral 1 denotes a manhole with a bracket 1A fixed on its outer periphery, an opening/closing member 3 pivotally supported on a shaft 4, and a lid 2 supported by the opening/closing member 3 on a shaft P. An arm 10 is rotatably attached to the tip of the opening/closing member 3 with a support shaft 11. Further, a nut 14 is rotatably provided above the arm 10, and the base of a hook 13 that engages and disengages from an engaging piece 12 provided on the outer periphery of the manhole is screwed into the nut 14. be. In the figure, 15 is a seal that maintains the seal between the lid 2 and the manhole 1, 16 is a lever for engaging and releasing the hook 13, and 10D is a stopper for the arm 10.

c Function When the urine spreader finishes the spreading work and pours the slurry into the tank 7 again, first rotate the lever 16 counterclockwise, and the arm 10 will rotate counterclockwise about the support shaft 11. However, if the center Y of the nut 14 exceeds the left side of the center X of the support shaft 11, the engagement piece 1
The hook 13 engaged with the lid 2 is rotated clockwise about the nut 14 to be disengaged, and the lid 2 is opened as shown in the second figure. Then, the hose of the slurry pump (not shown) is made to face the manhole 1, and the slurry is poured into the tank.

In addition, when closing the lid 2, if the lever 16 is rotated clockwise, the arm 10 will also be rotated clockwise about the support shaft 11, and the center Y of the nut 14 will be aligned with the support shaft 11.
When the hook 13 moves beyond the right side of the center X, the hook 13 rotates counterclockwise about the nut 14 and engages the engagement piece 12, and the lid 2 is closed in a sealed state.

Note that C indicates the distance between the center X of the support shaft 11 and the center Y of the nut 14.

C. Effects of the device Since the main device is constructed as described above, it has the following effects.

No matter how many times it is opened and closed, the lid can be tightened to the manhole with a constant tightening force.

The lid can be opened and closed with a single touch, making it convenient for frequently opening and closing the lid.

Since the opening/closing device does not have a threaded part unlike the conventional one, there is no possibility of the opening/closing being impossible due to rusting caused by adhesion of slurry, etc.

[Brief explanation of the drawing]

Figure 1 is a side view of the main parts of the present invention, Figure 2 is a side view of the present invention with the lid open, and Figure 3 is a side view of the main part of the present invention.
Figure 4 is the left side view of the urine spreader, Figure 5
The figure is a side view of a conventional one. 2...Lid, 3...Opening/closing member, 10...Arm, 11
...Spindle, 13...Hook, 14...Natsuto.

Claims (1)

[Scope of utility model registration request] An arm 10 is attached to the tip of the opening/closing member 3 connected to the lid 2.
is rotatably provided on a support shaft 11, and a shaft or nut 14 is rotatably provided above the support shaft 11,
A manhole opening/closing device for a urine spreader, characterized in that the shaft or nut 14 is connected to the base of a hook 13 whose tip engages and disengages from an engagement piece.