JPH0113595Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a manhole for a septic tank.

(Prior Art) Conventional septic tanks have lids made of iron plates, and because of their low load-bearing strength, they are unable to withstand the loads of automobiles, etc., and are surrounded by shelves, making the space above the septic tanks unusable.

(Technical Issues) The present invention focuses on the above points and makes it possible to utilize the space above the septic tank.For this purpose, the lid is made of cast iron to provide load-bearing strength and increase the weight of the lid itself. To provide a safe manhole for a septic tank, which allows the top of the septic tank to be used for a parking lot, etc., by preventing the lid from coming off when the lid is open, and does not cause any problems to the septic tank even in that case. It is.

(Technical Means) That is, the present invention consists of a lid body 1 and a frame body 2 that supports the lid body around its periphery. A bag-shaped groove 4 having a size to allow the engaging edge 3 to rotatably engage is formed on one side of the inside of the lid body 2, and the lid body 1 and the frame body 2 are fastened together with bolts or the like on the other side. This is a manhole for a septic tank.

The lid body 1 is preferably made of ductile cast iron, which increases load resistance and reduces weight, but is not limited thereto.

(Function) Since the lid 1 is made of cast iron, it has good load resistance and does not rust due to the gas generated in the septic tank.The lid 1 and the frame 2 that supports it are engaged on one side and the other Since the sides are fastened with bolts or the like, there is no risk that the cover 1 will come off unexpectedly, which contributes to the use of the top of the cover as a parking space, for example. On the other hand, when going in and out of a manhole, the cover body 1 can be opened by removing the fastening part, and the cover body 1 can be opened by removing the fastening part.
Since it is rotatably engaged in the groove 4, it can be reversed around the groove 4.

(Example) Cast iron lid body 1 and frame body 2 in the illustrated example
This is a rectangular manhole, and is an example in which two lid bodies 1 are arranged side by side on a rectangular frame body 2. However, frame 2
The frame body for one lid body is divided into right and left frame parts 5 and 6, and extension parts 7 and 8 with a length equal to an integral multiple of the length of the lid body 1 are interposed between them to form a connecting metal fitting. Since it has a structure that connects with 9..., the extension parts 7 and 8
A manhole of any length can be formed by changing or adding several covers. Therefore, from one lid to many lids can be manufactured using the minimum necessary number of parts, which contributes to reducing the number of manufactured items and facilitating storage, management, and transportation. 10, 11, and 12 indicate joining flanges.

The engaging edge 3 is provided to protrude downward from one side of the lid body 1, and the bag-shaped groove 4 that engages with this is recessed in the upper surface of a protrusion 13 that is provided to protrude from one side of the inside of the frame body 2. It consists of a protruding edge 15 that is provided and that engages with the shoulder portion 14 of the engagement edge 3, and a blind hole portion 17 that engages with the rotating portion 16 at the tip of the engagement edge 3 (FIG. 4). Therefore, the lid 1 can be opened by turning around the rotating portion 16, and is held at a constant opening degree, thereby preventing the lid from coming off when the lid is closed. The peripheral edge of the lid 1 is received by a suitable number of beam supports 18 protruding from the inner edge of the frame excluding the center, and the center, that is, the mating edges of the adjacent lids 1, 1 are supported by the center beam supports 19, 19 at the center of the frame 2. It is supported by a middle beam 20 installed between the lid bodies 1 and 19.
Staggered step portions 21 and 22 are formed on the mating edges (FIG. 3). Therefore, the lid bodies 1, 1, . . . are arranged in parallel without any gaps, and the safety against overload is also high. 23 indicates a positioning projection of the middle beam 20. The blind hole portion 17 also serves as a grease reservoir.

Means A for fastening the lid body 1 with other parts of the frame body 2 is provided on the side opposite to the engaging edge 3, and the fastening means A is connected to the recessed step 24 provided on the lid body 1 and the recessed part. Stepped section 2
A fastening piece 26 having a tip hook portion 25 that locks into 4.
and a bolt 29 and a tightening nut 30 that are screwed into the threaded portion 28 formed in the frame body 2 through the hole 27.
Consists of. Reference numeral 31 indicates a recess on the side of the frame body 2 in which the fastening piece 26 is housed, and reference numeral 32 indicates a handle for opening and closing the lid body 1.

(Effects) Since the present invention is configured as described above, the space above the septic tank can be used effectively, and the lid body 1 engages with the frame body 2 on one side when the lid is open, and is tightly fastened on the other side. Since the manhole is secured in place, there is no risk of it bouncing or moving even if a car runs over it, and when entering or exiting the manhole, the lid can be opened by simply removing the fastening part, and it engages with the frame 2 in a rotatable manner. Because of this, it has remarkable effects such as being able to easily flip it over and open it smoothly.

[Brief explanation of the drawing]

The drawings show an embodiment of a manhole for a septic tank according to the present invention, and FIG. 1 is a plan view, FIG. 2 is a cross-sectional view of the central portion, FIG. 3 is a vertical cross-sectional view of the same, and FIG. 4 is a central sectional view. 5 is a sectional view of the fastening means, and FIG. 6 is a partially sectional side view. 1... Lid body, 2... Frame body, 3... Engagement edge, 4...
...Bag-shaped groove, A...Tightening means.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a lid 1 and a frame 2 that supports the lid at its periphery, the lid is made of cast iron and has an engaging edge 3 protruding from one side; A bag-shaped groove 4 is formed on one side of the inside of the frame body 2 and has a size to allow the engagement edge 3 to rotatably engage, and the lid body 1 and the frame body 2 are connected to each other.
A manhole for a septic tank, which is constructed by fastening the two on the other side with bolts, etc. (2) For a septic tank according to claim 1 of the utility model registration claim, in which a projecting edge 15 is formed on one side of the inside of the frame 2 to engage with the shoulder 14 of the engagement edge 3 to prevent it from coming off. manhole. (3) A utility model in which the lid 1 has a regular quadrilateral shape, and the frame 2 has a regular quadrilateral shape that supports the lid 1 at its periphery, and consists of frame parts 5 and 6 divided into left and right halves. A manhole for a septic tank according to claim 1 or 2 of the registered claims. (4) The frame 2 is divided into left and right frame parts 5 and 6.
Utility model registration claim 3, which has extended portions 7 and 8 interposed between them, and the length of the extended portions 7 and 8 is set approximately equal to an integral multiple of the length of one side of the lid body 1. Manhole for septic tank as described in section. (5) The manhole for a septic tank according to claim 1 or 4, in which the lid body 1 has staggered stepped portions 21 and 22 on its sides that overlap when a plurality of lid bodies are arranged in parallel. (6) The manhole for a septic tank according to claim 5, in which the frame body 2 has a middle beam 20 located directly below the mating edges of the adjacent lid bodies 1, 1. (7) The means for fastening the lid 1 and the frame 2 includes a fastening piece 26 that locks the lid 1 and is bolted to the frame 2. . (8) The manhole for a septic tank according to claim 1, wherein the frame body 2 has an appropriate number of beam supports 18 for receiving the circumferential edge of the lid body 1 on the inner circumferential edge thereof.