JPH04153Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a soft mud sampler that is adapted to collect soft mud from the seabed, lakes, and reclaimed areas.

(Prior Art) As a conventional soft mud sampler, a gravity core sampler as shown in FIG. 5 is known.

This sampler consists of a cylindrical container 21 with an open bottom end connected to the bottom of a weight 20, and an air vent valve (not shown) provided at the top of the cylindrical container 21.
Core catcher 2 is installed at the bottom to close the bottom opening.
2 is provided.

As shown in FIGS. 6 and 7, this core catcher 22 has a triangular thin plate (core) 23 made of phosphor bronze.
A large number of pipes are arranged side by side and assembled into a conical shape, and the structure is such that it opens for flow from the bottom of the cone toward the head, but closes for flow in the opposite direction.

Such a conventional soft mud sampler collects soft mud by letting it fall freely into the soft mud due to the weight of the sampler body, but as mentioned above, there is only an air vent valve on the top of the cylindrical container 21, and it is large. Since no opening is provided, the soft mud that flows into the lower end of the cylindrical container 21 while it is falling remains in the cylindrical container 21 without escaping from the upper end. can be collected, but soft mud deeper than that cannot be collected, and the depth at which the sample inside the cylindrical container 21 can be sampled cannot be clearly specified.

Also, core catcher 2 when lifting the sampler
There is a risk that the fine grains of the collected soft mud may deviate from the gaps between the cores 23 of 2, and in this case, the grain size composition of the local rock will differ.

Furthermore, the sampler body is heavy at 30 to 80 kg, which requires heavy equipment such as a crane boat or a rigging barge for loading and lifting, which increases equipment costs and takes time to extract the sample. It was hot.

(Purpose of the invention) The purpose of the invention is to obtain a soft mud sampler that eliminates the above-mentioned drawbacks.

(Structure of the invention) The soft mud sampler of the invention includes a cylindrical container having an upper end and a lower end opening, and an upper lid and a bottom lid that are pivotally supported on the cylindrical container so as to open and close the upper end opening and the lower end opening of the cylindrical container, respectively. and a mechanism for opening and closing the bottom cover, and the bottom cover opening/closing mechanism includes an opening/closing link whose one end is connected to the free end of the bottom lid, and an upper end of the opening/closing link connected to the lower part thereof. an opening/closing rod that moves up and down relative to the cylindrical container; a tension spring that always restrains the opening/closing rod upwardly relative to the cylindrical container; a lock lever that locks the opening/closing rod against the cylindrical container while moving downward relative to the container; and a lock release rope connected to the free end of the lock lever for rotating the lock lever to release the lock. It is characterized by consisting of:

(Example of idea) Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, the soft mud sampler of the present invention includes a cylindrical container 1 having an upper and lower opening.
In order to open and close the upper end opening of this cylindrical container 1, two-split upper lids 2a and 2b are pivotally supported on the upper edge of the cylindrical container 1 so as to be pivoted upward from the cylindrical container 1 in a double-folded manner.
and a semi-circular horizontal section and a vertical section whose outer ends are pivoted to the lower edge of the cylindrical container 1 so that they can be rotated downward from the cylindrical container 1 in a double-door pattern to open and close the lower end opening of the cylindrical container 1. It consists of triangular semi-conical bottom covers 3a, 3b, and a mechanism 4 for opening and closing the bottom covers 3a, 3b.

The opening/closing mechanism 4 of the bottom lids 3a, 3b includes opening/closing links 5a, 5b whose lower ends are pivoted to the free side ends of the pyramidal bottom lids 3a, 3b, respectively, and the opening/closing links 5a,
An opening/closing plate 6 whose upper end of 5b is pivoted to its lower part, respectively.
, a long hole 7 provided in the opening/closing plate 6 extending in the vertical direction, and a guide pin 8 provided protruding from the side surface of the cylindrical container 1 so as to be slidably engaged with the long hole 7.
, a vertically extending opening/closing rod 9 whose lower part is fixed to the upper part of the opening/closing plate 6, a connecting rod 10 connected to the upper end of the opening/closing rod 9, and a fixing seat 11 provided at the upper part of the cylindrical container 1. A tension spring 12 is connected between the fixing seat 11 and the lower part of the opening/closing rod 9 to keep the opening/closing rod 9 upward at all times; A lock lever 14 rotatably supported, a hook portion 15 formed on the upper part of the lock lever 14, and the opening/closing rod 9 are pressed downward relative to the cylindrical container 1 against the tension spring 12. A lock pin 1 is provided on the opening/closing rod 9 so as to engage with the hook part 15 in the opened/closed state.
6, a lock release rope 17 connected to the free end of the lock lever 14, and a coil spring 18 for constantly rotating the lock lever 14 in the direction in which the hook portion 15 engages with the lock pin 16, for example, in a counterclockwise direction. When the lock lever 14 is rotated by the coil spring 18, it hits the side surface of the opening/closing rod 9 and locks the lever 14.
The lock lever 1 is configured to prevent excessive rotation of the lock lever 1.
The stopper 19 is provided to protrude from the stopper 4.

Since the soft mud sampler of the present invention has the above-described configuration, if the opening/closing rod 9 is pushed down relative to the cylindrical container 1 against the tension spring 12 as shown in FIG. Bottom lid 3a, 3b
rotates outward about its pivot point, and the cylindrical container 1
At the same time, the lock pin 16 engages with the hook portion 15 of the lock lever 14, and the opening/closing rod 9 is locked to the cylindrical container 1.

In this state, the cylindrical container 1 is manually pushed while adding the connecting rods 10 to a predetermined depth. While the cylindrical container 1 is being lowered by this pushing, the soft mud enters through the lower end opening of the cylindrical container 1 and exits through the upper end opening, so that the upper lids 2a and 2b remain open upward.

Next, when the lock is pushed to a predetermined depth and the lock release rope 17 is pulled, the lock lever 14 rotates clockwise around the shaft 13 against the coil spring 18, and as a result, the opening/closing rod is released from the hook portion 15 of the lock lever 14. 9 is removed, and the opening/closing rod 9 is pushed upward relative to the cylindrical container 1 by the action of the tension spring 12, and as a result, the opening/closing link 5
The bottom lids 3a and 3b are rotated via a and 5b to close the lower end opening of the cylindrical container 1.

Therefore, after this, the connecting rod 10 can be pulled up to collect soft mud at a predetermined depth from inside the cylindrical container 1.

(Effects of the invention) As described above, the soft mud sampler of the present invention can easily and reliably sample soft mud at a predetermined depth, and continuous sampling is also possible. There is no leakage from the
Furthermore, when the sampler is pulled up, the upper cover is automatically closed by the action of the soft mud at the top, so soft mud at different depths does not mix.

In addition, the sampler body is lightweight, weighing approximately 3.5 kg, and the sampler can be pushed in and pulled out manually, without the need for a special stand, and the bottom cover can be closed by simply pulling the lock release rope 17. The operation is extremely simple, and the time required for sampling is approximately 100m, for example, at a depth of 10m.
It takes less than 10 minutes and has a big advantage.

[Brief explanation of the drawing]

Figure 1 is a front view of the soft mud sampler of the present invention, Figure 2
Figure 3 is a front view of the lock lever, Figure 4 is a side view, Figure 5 is an explanatory diagram of a conventional soft mud sampler, Figure 6 is a front view of its core catcher, and Figure 7 is a front view of the lock lever. FIG. 1, 21... cylindrical container, 2a, 2b... upper lid,
3a, 3b... Bottom cover, 4... Mechanism for opening and closing bottom covers 3a, 3b, 5a, 5b... Opening/closing link, 6... Opening/closing plate, 7... Long hole, 8... Guide pin, 9 ...Opening/closing rod, 10...Connecting rod, 1
1... fixed seat, 12... tension spring, 13... shaft,
14...Lock lever, 15...Hook part, 16
...Lock pin, 17...Lock release rope, 1
8...Coil spring, 19...Stopper, 20...
... Weight, 22 ... Core catcher, 23 ... Triangular thin plate (core).

Claims (1)

[Scope of utility model registration request] a cylindrical container having an upper end and a lower end opening; a top lid and a bottom lid pivotally supported on the cylindrical container so as to open and close the upper end opening and the lower end opening of the cylindrical container, respectively;
It consists of a mechanism for opening and closing this bottom cover,
The opening/closing mechanism of the bottom lid includes an opening/closing link whose one end is connected to the free end of the bottom lid, and an opening/closing rod which connects the upper end of the opening/closing link to its lower part and moves up and down relative to the cylindrical container. A tension spring that always restrains the opening/closing rod upwardly relative to the cylindrical container; A soft mud sampler comprising: a lock lever that is restrained by the cylindrical container; and an unlocking rope connected to the free end of the lock lever for rotating the lock lever to release the lock.