JPH0621947Y2 - Drain material cutting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a drain material cutting device used in a board drain method, which is a type of soft ground improvement method.

(Prior art) In the board drain method, a drain material made of paper fibers or polymer chemical fibers is inserted into a hollow mandrel, the mandrel is driven into the soil together with the drain material, and then only the mandrel is pulled up and left in the soil. It is a construction method that aims to strengthen the ground by discharging pore water in the soil through the drain material.

By the way, in this board drain construction method, after pulling up the mandrel from the soil, the drain material must be cut under the mandrel, but conventionally, an operator manually holds an appropriate cutter in his hand. It was common to do the cutting. In this case, since the drain material has a characteristic that it is difficult to cut it easily, this cutting requires a lot of time and labor, and particularly when cutting a large number of continuously driven drain materials, a significant increase in labor burden is caused. It was a result. Further, in the offshore construction, since the mandrel has to be pulled up to the sea and then cut, the drain material corresponding to the water depth is wasted, resulting in an increase in construction cost.

In view of the current situation, a part of the development of the device for automatically cutting the drain material has been made (Basic Engineering Vol.13 1985 No.8 P
twenty three). As shown in FIGS. 9 (a) and 9 (b), this device is provided with a rotary blade 3 which allows the drain material 2 to be inserted thereinto inside the lower end of the mandrel 1, and is fixed so as to be engageable with the rotary blade 3. After the blade 4 is provided and the drain material 2 is placed, the rotary blade 3
The drain member 2 can be cut between the fixed blade 4 and the fixed blade 4, and there is an advantage that the drain member can be efficiently cut regardless of land construction or sea construction.

(Problems to be solved by the invention) However, in the drain material cutting device, the rotary blade 3 and the fixed blade 4 are arranged in the narrow mandrel 1, and the driving means for the rotary blade 3 is also arranged. Therefore, there is a problem that the manufacturing is difficult and the maintainability is poor.

(Means for Solving the Problems) The present invention has been made to solve the above-mentioned conventional problems, and is characterized in that a support frame having a mandrel insertion space and the support frame are provided. A pair of left and right turrets, at least one of which is capable of moving forward and backward with respect to the other side, and a pair of cutting blades detachably attached to each of the turrets that cooperate to shear the drain material, and the pair of turrets. And a pair of pressing members that are attached to each of the bases and that sandwich the drain material in advance of the cutting edge, at least one of the pair of pressing members being movably supported by the tool rest and the other of the pressing members. The pair of pressing members are biased by a compression spring toward the pressing member, and each of the pair of pressing members includes at least two members arranged in the upper and lower directions in the vicinity of each cutting edge. The point is that it is configured to exist.

(Operation) In the drain material cutting device having the above configuration, if the mandrel is pulled up from the soil and then the tool rest is advanced, the drain material is first clamped by the preceding pressing member, and then sheared by the cutting blade that advances. The expression is cut. That is, since the drain member can be fixed in position in a tensioned state and the cutting can be performed, the reliable cutting is possible.

In addition, since each element is collectively arranged on the support frame to make it a unit, the entire device is compact, and it not only can correspond to the board drain construction method for both onshore and offshore construction, but also improves the maintainability and further the mandrel. It is also possible to cut the drain material below.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show a first embodiment of the present invention. In these figures, 11 is a support frame formed by arranging angles in a rectangular shape, and a pair of guide rods 12 and 12 are bridged between the opposing angles.
The pair of guide rods 12, 12 includes a drain member 13
The pitch is appropriately determined so that the insertion space A of the mandrel 14 for accommodating the can is secured, and the movable tool rest 15 is slidably held in a double-supported state.
The movable tool rest 15 is connected to a piston rod 17 extending from a cylinder 16 fixedly mounted on the support frame 11 with a joint 1.
8 is connected through the guide rod 12 and is moved along the guide rod 12 by the operation of the cylinder 16. Reference numeral 19 denotes a fixed tool post fixed to the support frame 11 so as to face the movable tool post 15. The fixed tool rest 19 is firmly fixed by welding with its back surface abutting against the angle of the support frame 11. A through hole 19a extending horizontally is provided in the middle of the fixed tool post 19 in the height direction.

A first cutting edge 20 is detachably attached to the movable tool rest 15. The first cutting edge 20 is held in a state in which its base is fitted in the movable tool rest 15, and is normally prevented from coming off by a screw 21. The movable turret 1
5, first pressing members 22, 22 are attached to the upper and lower pairs with the first cutting edge 20 in between. The first pressing member 22 includes rods 24 penetrating guide blocks 23 fixed to the upper and lower surfaces of the movable tool rest 15,
It is fixed to one end of 24 and can move together with the rod 24. The rod 24 is prevented from coming off from the guide block 23 by nuts 25, 25 attached to the other ends thereof, and the first pressing member 22 is positioned just forward of the first cutting edge 22 at the forward end thereof. Its length has been adjusted to allow it. Also the first
A compression spring 26 is interposed between the pressing member 22 and the guide block 23, so that the first pressing member 22 is always positioned slightly ahead of the first cutting edge 20. ing.

On the other hand, on the fixed tool rest 19, a pair of upper and lower second pressing members 27, 27 are fixed by bolts 28. This pair of second pressing members 27, 27 is provided with the fixed tool rest 19
Are arranged so as to form a gap 29 corresponding to the through hole 19a provided in the above, and are connected by connecting bars 30 on both sides. Reference numeral 31 is a second cutting edge disposed in the gap 29, the rear surface of which is the upper second pressing member 2
7 in the state of being brought into contact with the connecting bar 30, the screw 30a
It is fixed in. That is, the second pressing member 27,
27 and the second cutting edge 31 are integrated via a connecting bar 30. The remaining portion of the gap 29 excluding the second cutting edge 31 becomes an insertion space for the first cutting edge 20, and the second cutting edge 31 is slightly smaller than the first cutting edge 20. Positioned to maintain clearance.

Then, the second pressing member 27 has the bolt 28
The insertion hole 27a is a long hole 27a that is long in the vertical direction. An adjusting screw 33 that engages the tip of the second pressing member 27 below is screwed into the bracket 32 extending from the lower end of the support frame 11. As a result, when the bolt 28 is now loosened and the adjusting screw 33 is turned to the screw tightening side, the second pressing member 27 and the second cutting edge 31 are integrally moved upward, and the above clearance fine adjustment is performed. Will be able to.

The support frame 1 along the moving direction of the movable tool rest 15
There are two proximity switches 34 at an appropriate interval for one angle.
a and 34b are provided, while the movable tool rest 15 is provided.
A dog 35 is fixedly provided on the side wall and extends laterally through the elongated hole 11a formed in the angle. The proximity switches 34a, 34b and the dog 35 play a role of detecting the backward end and the forward end of the movable tool rest 15, and the operation of the cylinder 16, that is, the movable tool rest 15 is based on the signals of the proximity switches 34a, 34b. 15 movements are controlled.

Hereinafter, the operation when the drain material cutting device 40 having the above configuration is applied to the board drain construction method for offshore construction will be described with reference to FIG.

In FIG. 5, 41 is a work boat, 42 is a leader extending from the work boat 41 to the vicinity of the seabed 43, and the drain material cutting device 40 is arranged at the lower end of the leader 42. The mandrel 14 is supported by a winch (not shown) or the like, and the drain member 13 pulled out from the drum 44 is inserted therein. Then, attach the tip cone 45 to the drain material 13 pulled out from the lower end of the mandrel 14,
Then, the mandrel 14 is driven into the seabed 43 by the operation of the winch or the like, and after driving the mandrel 14 at a predetermined depth, the mandrel 14 is pulled up. Then, the drain material 13 remains as it is in the seabed ground 43 due to the tip cone 45 being caught by the soil.

Then, at the same time when the mandrel 14 is pulled up from the seabed ground 43, the cylinder 16 of the drain material cutting device 40 is operated. Then, the movable turret 15 advances toward the fixed turret 19, and firstly precedes the first cutting edge 20 by the first cutting edge 20.
The drain member 13 is moved toward the fixed tool rest 19 side by the pressing member 22 of the first pressing member 22, and finally the first and second pressing members 22,
The drain material 13 is sandwiched between the 27. The movable tool rest 15 continues to move forward, whereby the first pressing member 22 moves backward against the spring force of the compression spring 26, and the first cutting edge 20 moves forward relatively. As a result,
The drain material 13 is sheared between the first cutting edge 20 and the second cutting edge 31, and the first cutting edge 20 enters the gap 29 (FIG. 2) as it is. At this stage, one of the proximity switches 34b senses the dog 35 (FIG. 1), and the signal from the proximity switch 34b causes the cylinder 16 to stop operating, and then immediately starts to operate in the opposite direction. The movable tool rest 15 returns to its original position.

In this way, by only operating the cylinder 16, the first,
The drain material 13 can be automatically sheared by the first and second cutting edges 20 and 31 after the drain material 13 is fixed by the second pressing members 22 and 27. 13 can be surely cut. Moreover, by disposing the drain material cutting device at the lower end portion of the leader 42, it becomes possible to cut near the seabed 43, and waste of the drain material 13 can be greatly suppressed.

6 to 8 show a second embodiment of the present invention. In these drawings, reference numeral 51 denotes a support frame, which has a bottom plate 52 having an insertion space A for the mandrel 14 and the bottom plate 5
It is composed of a pair of side plates 52 and 53 which are erected on both sides of 2. A pair of guide rods 54, 54 are bridged between the pair of side plates 53, 53, and movable tool rests 55, 55 are slidably held by the left and right pairs.
And the first cutting edge 56 is attached to one of the movable tool rests 55,
A second cutting edge 57 is detachably attached to the other movable tool rest 55. These first and second cutting edges 56 and 57 play a role of shearing the drain material 13 in cooperation with each other, and their relative positions are determined so that an appropriate clearance can be maintained.

Further, on the bottom plate 52 of the support frame 51, a pair of left and right bases 59, 59 guided by slide guides 58, 58 are arranged. The bases 59, 59 are connected to the lower ends of the movable tool rests 55, 55, and guide plates 60, 60 are provided on the bases 59, 59 at the rear of the movable tool rests 55, 55. Has been done. That is, the movable tool rest 55 and the guide plate 60 are integrated via the base 59 so that they can move integrally within the support frame 51.

Reference numeral 61 denotes a holding member fixed to one end of a rod 62 penetrating each of the pair of movable tool turrets 55 and the pair of guide plates 60. ing. The rod 62 is prevented from coming off by a stopper portion 62a which is integrally provided at the other end of the rod 62 which comes out to the rear of the guide plate 60, and at the forward end thereof, the pressing member 61 is just moved to the first cutting edge 56 or the second cutting edge 56a. Its length is adjusted so that it can be positioned slightly forward of the cutting edge 57. Further, a compression spring 63 is interposed between the pressing member 61 and the movable tool rest 55, whereby the pressing members 61, 61 are always positioned slightly forward of the first and second cutting edges 56, 57. It is supposed to be done.

Further, from the support frame 51, the bracket 6 is moved to one side.
4 is extended, and a gate-shaped support plate 65 is erected on the bracket 64. A cylinder 66 is fixedly mounted on the upper end of the support plate 65, and a piston rod 66a extending downward is attached with a rack unit 68 including a pair of left and right first racks 67, 67. ing. On the other hand, rotary shafts 69, 69 are rotatably arranged on the bottom plate 52 of the support frame 51, and the first rack 67, 69 is attached to one end of the rotary shaft 69, 69 protruding upward from the bracket 64.
First pinions 70, 70 that engage with 67 are mounted. Further, the rotary shafts 69, 69 are bridged to the notches 52a, 52a provided in the bottom plate 52 of the support frame 51, and the second pinion 71, 71 is provided at the portion of the rotary shaft 69 facing the notches 52a. Is installed.

Thus, the bottom plate 52 of the support frame 51 is provided with grooves 52b and 52b which are connected to the notches 52a, and the second racks 72 and 52 which engage with the second pinion 71 are provided in the grooves 52b. 72 is stored. The second rack 72 is integrated with the base 59 by threading a threaded portion 73 projecting from the second rack 72 through the base 59 and extending upward and screwing a nut 74 into the screw.

The drain material cutting device 80 having such a configuration is arranged at the lower end of the leader 42 in the same manner as shown in FIG. Then, when the cylinder 66 is operated after the mandrel 14 is pulled up from the seabed 43 (see FIG. 5), the rack unit 68 descends to engage the first racks 67, 67 with the first pinion 70. , 70 rotate, and this rotation is transmitted to the second pinions 71, 71 via the rotary shafts 69, 69. As a result, the second racks 72, 72 engaging with the second pinions 71, 71 relatively move forward, and the bases 59, 59 integrated with the second racks 72, 72 also relatively move forward.

As the bases 59, 59 move forward, the movable tool rest 55 and the guide plates 60, 60 that are integral with the bases 59, 59 also move forward,
Following this, the drain member 13 is clamped by the pair of preceding pressing members 61, 61, and then the compression spring 63.
The drain members 13 are sheared by the first cutting edge 56 and the second cutting edge 57 that relatively move forward against the pressing force of the pressing members 61, 61 against the spring force.

As described above, the drain material 1 is moved by the operation of the cylinder 66.
3 can be cut automatically, but the pair of pressing members 61, 61 and the first and second cutting edges 56, 57 can be cut.
Is relatively advanced, the drain member 1
3 can be cut, the moving distance of the movable tool rest 55 can be shortened accordingly, and the cutting time can be shortened.

In addition, in the above-mentioned two embodiments, the example of application to the board drain construction method for sea construction is shown, but the present invention is not limited to this, and it goes without saying that the present invention can also be applied to the board drain construction method for land construction.

(Effects of the Invention) As described above in detail, the drain material cutting device according to the present invention enables at least one of the pair of tool rests to move back and forth with respect to the other side, and the drain tool cutting device is provided with a tool. Since a cutting edge that moves to cut the drain material and a pressing member that clamps the drain material in advance of the cutting edge are provided, it is possible to reliably cut even a soft and flexible drain material at a desired position. effective. In addition, since cutting can be performed without using a sharp cutting edge or even when the clearance is not close to zero, the life of the cutting edge is greatly extended even in a bad environment, and the durability and reliability are improved.

In addition, since each element is collectively placed on the support frame and made into a unit, it can be easily applied to the board drain construction method for both onshore and offshore construction, and has the effect of improving maintainability.

Furthermore, the degree of freedom in installation is increased, and it becomes possible to cut the drain material directly under the mandrel, which has the effect of significantly reducing the waste of the drain material.

[Brief description of drawings]

1 to 4 show a first embodiment of the drain material cutting device according to the present invention. FIG. 1 is a plan view, FIG. 2 is a sectional view taken along line II-II of FIG. Fig. 3 is a side view showing a partial cross section, Fig. 4 is a IV-IV cross sectional view of Fig. 2, and Fig. 5 is a schematic diagram showing an example of application of this drain material cutting device to a board drain construction method at sea. FIGS. 6 to 8 show a second embodiment of the present drain material cutting device. FIG. 6 is a plan view, FIG. 7 is a front view, and FIG. 8 is a side view. 9th
FIGS. (A) and (b) are schematic views of a conventional drain material cutting device. 11,51 …… Support frame 15, 19, 55 …… Turret 20, 31, 56, 57 …… Cutting edge 22, 27, 61 …… Presser member 16, 66 …… Cylinder 13 …… Drain material 14 …… Mandrel A: Mandrel insertion space

Claims (1)

[Scope of utility model registration request] 1. A drain material cutting device used in a board drain construction method, comprising: a support frame having a mandrel insertion space; and a pair of left and right support frames, at least one of which is capable of advancing and retracting with respect to the other side. A table, a pair of cutting blades detachably attached to each of the turrets for shearing the drain material in cooperation with each other, and a pair of cutting blades attached to each of the turret boards and sandwiching the drain material prior to the cutting blades. Consisting of a pressing member, the pair of pressing members,
At least one of the pressing members is movably supported by the tool rest and is urged toward the other pressing member by a compression spring, and each of the pair of pressing members is close to each cutting edge and above it. A drain material cutting device including at least two members arranged in a downward direction.