Mobile cutting device

Abstract

To provide a mobile attachment device for a blade mouth allowing rapid installation.SOLUTION: A mobile attachment device 3 for a blade mouth is provided with: a plurality of attachment blade mouths 4 for attachment arranged on a work space 13 side of the blade mouth 11 of a pneumatic caisson 1; and a plurality of moving mechanisms 5 for the plurality of attachment blade mouths 4, where the moving mechanisms 5 enable the attachment blade mouths 4 to move between a retreat position P1 above the blade mouth 11 and a resistance position P2 below the blade mouth 11. By this structure, the mobile attachment device 3 for the blade mouth allows the attachment blade mouth 4 to be very quickly installed by simply moving the attachment blade mouth 4 without requiring carrying-in work of the attachment blade mouth 4.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a false cutting edge used to increase cutting edge resistance in caissons and pneumatic caissons. [Background technology]

[0002] Conventionally, when a situation occurs during pneumatic caisson subsidence excavation where the ground bearing capacity is insufficient due to soft ground, etc., causing the caisson to tilt, it is necessary to suppress the tilt by increasing the resistance. As a method for suppressing such tilt, a support member called a steel sandle is sometimes installed in the work chamber.

[0003] Another method for suppressing tilting is to implement a measure called a "tipped blade hole," as described in Patent Document 1. This tipped blade hole is installed on the inside of the blade hole in the area where the measure is required, thereby increasing resistance in that area and suppressing subsidence. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 10-37203 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with conventional "blade holes," even if the anchor bolts are buried in the ground beforehand, it takes time to transport the blade holes into the work room and install them. Therefore, there was a need to develop a method for installing the blade holes more quickly.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a portable knife attachment device that can be installed very quickly. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the movable blade nozzle device of the present invention comprises a plurality of blade nozzles installed on the work chamber side of the blade nozzle of a pneumatic caisson, and a plurality of moving mechanisms for the plurality of blade nozzles, which enable the blade nozzles to move between a retracted position located at the top of the blade nozzles and a resistance position located at the bottom of the blade nozzles. Effect of the Invention

[0008] In this way, the mobile cutting edge device of the present invention comprises a plurality of cutting edges installed on the working chamber side of the cutting edge of the pneumatic caisson, and a plurality of moving mechanisms for the plurality of cutting edges, which are configured so that the cutting edges can move between a retracted position at the top of the cutting edge and a resistance position at the bottom of the cutting edge. Because of this configuration, the mobile cutting edge device of the present invention does not require the work of transporting the cutting edges, and can install the cutting edges extremely quickly just by moving the cutting edges. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a side view of a pneumatic caisson. [Diagram 2] This is a plan view of the cutting edge of a pneumatic caisson. [Diagram 3] FIG. 2 is a side view of a movable cutting edge device. [Figure 4] FIG. 2 is a plan view of a movable cutting edge device. [Diagram 5] FIG. 2 is a front view of the movable cutting edge device. [Figure 6] FIG. 4 is an explanatory diagram illustrating the configuration and function of a wedge mechanism. [Figure 7] 5A to 5C are explanatory diagrams illustrating the configuration and function of a hook mechanism. [Figure 8] 1 is a diagram showing a procedure for using a movable cutting edge device, in which (a) shows a procedure for moving from a resistance position P1 to a withdrawal position P1, and (b) shows a procedure for moving from the withdrawal position P1 to a resistance position P2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the components described in the following embodiments are merely examples, and are not intended to limit the technical scope of the present invention. EXAMPLES

[0011] First, the overall configuration of a pneumatic caisson 1 equipped with a mobile cutting edge device 3 of the present invention will be described with reference to Figures 1 and 2. As shown in Figures 1 and 2, the pneumatic caisson 1 has a cutting edge 11 with a tapered tip formed at the bottom of a side wall 10, and a work chamber 13 is formed by being surrounded by the inner surface of this cutting edge 11 and the underside of a work chamber slab 12. An excavator 2 is disposed within the work chamber 13, and the pneumatic caisson 1 is lowered by excavating the ground (natural bedrock) with the excavator 2, which is remotely operated.

[0012] A material shaft 14 extends from the work room 13 toward the ground, and a material lock 15 is installed at the top. Although not shown, a man shaft or man lock can also be installed from the work room 13.

[0013] The soil excavated by the excavator 2 is dumped into a soil bucket 18 and discharged to the outside through the material shaft 14 and the material lock 15. In addition, although not shown, compressed air equipment is provided for supplying and discharging compressed air to the work chamber 13, the material shaft 14, the material lock 15, etc.

[0014] In addition, a central monitoring room (not shown) has been installed on the ground near the pneumatic caisson 1, and overall monitoring and management is carried out from here, including operation of the excavator 2, operation of the soil bucket 18, transportation of materials through the material shaft 14 and material lock 15 and removal of excavated soil, and display of the caisson's sinking amount, inclination, and other posture.

[0015] 2, a plurality of movable cutting holes 4,... are provided on the cutting hole 11 of the pneumatic caisson 1 of this embodiment in order to partially increase the resistance force from the ground depending on the position. Specifically, on the working chamber side (inside) of the cutting hole 11, 16 cutting holes 4,... (e.g., spaced apart by a circumferential angle of 22.5 degrees each) are distributed in the circumferential direction and arranged so as to be slidable in the diagonal vertical direction along the inclination of the inner surface of the cutting hole 11. Note that the number of cutting holes 4 is not limited to 16, and an appropriate number of cutting holes 4 can be arranged depending on the size and shape of the pneumatic caisson 1.

[0016] The cutting edge 4 is made of steel plates and has an overall I-shaped cross section (H-shaped cross section), and is integrally composed of an upper plate 40a perpendicular to the inner surface of the cutting edge 11, a vertical plate 40b connected to the upper plate 40a and the lower plate 40c, a lower plate 40c that is approximately horizontal when installed and contacts the ground, a horizontal plate 40d connected to the upper plate 40a and the lower plate 40b and approximately parallel to the inner surface of the cutting edge 11, and a base portion 21 that follows the inner surface of the cutting edge 11 (see Figures 6 and 7 for the configuration of the main body portion 40 of the cutting edge 4). As will be described below, the cutting edge 4 and the moving mechanism 5 for the cutting edge 4 constitute a mobile cutting edge device 3, which improves safety and construction speed.

[0017] That is, as shown in Figs. 3 to 5, the movable cutting edge device 3 is configured so that each of the multiple cutting edges 4, ... can slide between a retracted position P1 above the cutting edge 11 and a resistance position P2 below the cutting edge 11 via a moving mechanism 5. Of these, the retracted position P1 is a position where the hook mechanism 44 is hooked onto the upper edge of the base portion 50 of the rail 51, as described below. On the other hand, the resistance position P2 is a position determined according to the position of the ground at the time of movement, and is a position where the cutting edge 4 actually receives resistance from the ground. The resistance position P2 is usually located below the cutting edge 4.

[0018] Specifically, this movement mechanism 5 is composed of rails 51, 51 extending obliquely upward and downward along the working chamber 13 side (i.e., the inside) of the cutting nozzle 11, and a base portion 41 that is integrated with the cutting nozzle 4 and fits slidably on the rails 51, 51. In other words, the base portion 41 of the cutting nozzle 4 is fitted inside the rails 51, 51 that are installed in parallel on both the left and right sides, with a gap large enough to allow the base portion 41 of the cutting nozzle 4 to slide.

[0019] More specifically, the rail 51 is formed in an L-shape from a steel plate, and is fixed by welding to the left and right sides of a long and narrow rectangular base portion 50 fixed by anchor bolts to the inner surface of the cutting hole 11 so that the tipped cutting hole can be inserted inside. Then, the base portion 41 of the tipped cutting hole 4, which is formed from a steel plate with a thickness approximately the same as the width of the open L-shape, is fitted into it.

[0020] The movement mechanism 5 of the blade nozzle 4 in this embodiment is adapted to be able to reciprocate between the retracted position P1 and the resistance position P2 by the operation of the bucket 20 of the excavator 2, which serves as heavy machinery arranged in the work chamber. Specifically, as will be described below, the movement mechanism 5 is configured to be able to realize both a retraction function at the retracted position P1 and a resistance function at the resistance position P2 by mounting left and right wedge mechanisms 43, 43 and a central hook mechanism 44, which can be operated by the bucket 20 of the excavator 2, on the upper part of the main body 40 of the blade nozzle 4, as described below.

[0021] The wedge mechanism 43 prevents the blade opening 4 from sliding upward when it receives resistance force from the ground at resistance position P2, and as shown in Figures 6(a) and (b), it is composed of a hole portion 43a formed between the upper surface of the blade opening 4 and the rail 51, a wedge portion 43b to be inserted into the hole portion 43a, and an umbrella portion 43c for operating the excavator which is fixed to the top of the wedge portion 43b by welding.

[0022] Among these, the hole 43a is a recess formed by cutting out the upper plate 40a. On the other hand, the wedge portion 43b is formed as a separate body from the main body 40, and has a shape in which the width gradually narrows toward the tip (downward when installed). The hole 43a may be formed by welding a reinforcing steel plate 43d to the underside of the upper plate 40a so as to be gradually narrowed from the cutout portion of the upper plate 40a to face the wedge portion 43b. In this case, the rail 51 can be more firmly fixed by the wedge portion 43b. The specific shapes of the wedge portion 43b and the hole 43a are not limited to the shapes described here.

[0023] 6(a), the wedge portion 43b fits into the hole portion 43a, and the entire blade opening 4 is fixed to the rail 51 by friction. More specifically, the rail 51 is sandwiched between the base portion 41 and the wedge portion 43b, and the blade opening 4 is fixed. On the other hand, in the released state (movable state) shown in FIG. 6(b), the bucket 20 of the excavator 2 moves the wedge portion 43b so as to be pulled out of the hole portion 43a, and thus the frictional force is no longer applied, and the entire blade opening 4 can slide freely relative to the rail 51.

[0024] The hook mechanism 44 is adapted to prevent the blade attachment opening 4 from sliding downward (falling) when subjected to gravity at the retracted position P1, and as shown in Figures 7(a) and (b), is composed of a hook portion 44a which is rotatably (swingably) supported via a bracket at the top of the blade attachment opening 4 and hooked onto the upper end of the rail 51, a receiving portion 44b for operating the excavator which is connected to the hook portion 44a, and a spring 44c for urging the hook portion 44a in the direction of the rail 51.

[0025] Of these, the hook portion 44a is rotatably supported via a rotating shaft between a pair of brackets erected on the upper surface of the upper plate 40a. The hook portion 44a is connected to the receiving portion 44b via a link member, and the tip side of the hook portion 44a moves to the front side (the side farther from the cutting edge 11) when the receiving portion 44b is pressed toward the rear side (the side closer to the cutting edge 11). The tip side of the hook portion 44a is biased toward the rear side by a spring 44c.

[0026] Therefore, in the hooked state shown in Fig. 7(a), the receiving portion 44b is not pressed, and the tip side of the hook portion 44a is urged backward by the spring 44c and hooked to the upper end of the rail 51. Therefore, the cutting blade opening 4 does not move (fall) downward. On the other hand, in the released state (movable state) shown in Fig. 7(b), the receiving portion 44b is pressed backward by the bucket 20 of the excavator 2, so that the tip side of the hook portion 44a rotates and moves forward against the urging force of the spring 44c, and the hooking to the upper end of the rail 51 is released. Therefore, the cutting blade opening 4 can freely move downward. (installation) The rail 51 may be attached to the cutting edge 11 in advance, and when the center is removed, the cutting edge 4 may be attached to the rail 51 and placed in the retreated position P1 (pre-installation), or the rail 51 may be attached later via an anchor bolt (post-installation). (Removed) When removing the blade hole, only the blade hole 4 can be pulled out from the top of the rail 51 and removed. Alternatively, the rail 51 and the blade hole 4 can be removed together by removing the anchor bolt.

[0027] (Usage Procedure) In this way, the movable knife hole device 3 is equipped with a wedge mechanism 43 and a hook mechanism 44 in addition to the moving mechanism 5 for the knife hole 4, and can be moved and fixed only by the operation of the bucket 20 of the excavator 2. Next, the procedure for using the movable knife hole device 3 will be described with reference to FIG.

[0028] Specifically, as shown in Fig. 8(a) , when the cutting tool nozzle 4 is no longer needed and is to be retracted upward, the wedge mechanism 43 at the upper part of the cutting tool nozzle 4, which is at the lower resistance position P2, is released. That is, the umbrella part 43c is lifted by the bucket 20 of the excavator 2 to pull out the wedge part 43b. Next, the cutting tool nozzle 4 is lifted to the retracted position P1 at the upper end of the rail 51, for example, by hooking the bucket 20 onto the upper plate 40a of the cutting tool nozzle 4. Then, the hook part 44a of the hook mechanism 44 is automatically hooked onto the upper end of the rail 51.

[0029] On the other hand, as shown in FIG. 8(b), when the blade hole 4 becomes necessary and is moved downward to obtain resistance, the hook mechanism 44 at the upper part of the blade hole 4, which is in the upper retreat position P1, is released. That is, the receiving part 44b is pushed and shifted slightly downward by the bucket 20 of the excavator 2, so that the hook part 44a is swung forward and the entire blade hole 4 is moved downward. Next, the upper plate 40a of the blade hole 4 is pushed by the bucket 20, etc., to push the blade hole 4 down to the resistance position P2 at the bottom of the rail 51. Then, just to be sure, the umbrella part 43c of the wedge mechanism 43 is pushed from above by the bucket 20, etc., to firmly insert and fix the wedge part 43b into the hole part 43a.

[0030] Next, the effects achieved by the movable cutting blade holder device 3 of this embodiment will be listed and explained.

[0031] (1) As described above, the mobile blade attachment device 3 of this embodiment includes a plurality of blade attachment holes 4,..., which are installed on the working chamber 13 side of the blade attachment hole 11 of the pneumatic caisson 1, and a moving mechanism 5 for the plurality of blade attachment holes 4,..., which allows the blade attachment hole 4 to move between the retreat position P1 at the top of the blade attachment hole 11 and the resistance position P2 at the bottom of the blade attachment hole 11. With this configuration, the mobile blade attachment device 3 of the present invention does not require the work of carrying in the blade attachment hole 4, and the blade attachment hole 4 can be installed extremely quickly just by moving the blade attachment hole 4. In other words, while the conventional method required steps such as "preparing the blade attachment hole", "inserting the blade attachment hole", "moving and installing the blade attachment hole", and "placing a filler below the blade attachment hole", the present invention allows "leveling, installation, and wedge fixing" to be performed as a single step in an extremely short time.

[0032] In this way, it was discovered that if the blade nozzle 4 can be temporarily placed inside the work chamber 13, it will not be necessary to carry it in and out of the work chamber 13, and that the base of the main blade nozzle 11 and the work chamber slab 12 inside the work chamber 13 can be used without affecting excavation and sinking work. The base of the blade nozzle 11 and the work chamber slab 12 is not occupied by anything other than cables for the electrical system and measurement system, and it has been confirmed that the tail of the overhead traveling shovel (excavator 2) does not come into contact with it when rotating. Furthermore, the sliding type blade nozzle device 3 connects the place of use and the storage place when not in use with a sliding rail 51, and can be fixed in each place when in use or when not in use for use or storage.

[0033] (2) In addition, the moving mechanism 5 is composed of the rail 51 extending obliquely upward and downward along the working chamber 13 side of the cutting edge 11, and the base portion 41 which is integrated with the cutting edge 4 and fits onto the rail 51 so as to be freely slidable. Therefore, if the rail 51 and the base portion 41 are prepared in advance, the moving operation can be carried out and completed in an extremely short time.

[0034] (3) Furthermore, the moving mechanism 5 can be moved between the evacuation position P1 and the resistance position P2 by the operation of the excavator 2 arranged in the work chamber 13. This eliminates the need for workers to enter a pressurized environment (reduction in high-pressure work), improving safety and enabling work to be carried out and completed in a shorter time.

[0035] (4) In addition, it is preferable that the blade opening 4 further has a wedge mechanism 43 that prevents the blade opening 4 from sliding upward along the rail 51 due to the resistance force received from the ground at the resistance position P2 so that the blade opening 4 can withstand the resistance force from the ground. By using the wedge mechanism 43 in this way, the blade opening 4 can be fixed at any position, which significantly improves the adhesion between the blade opening 4 and the ground, and the blade opening 4 can instantly exert its effect as a sinking resistance force against a displacement load, which is the purpose of the blade opening 4.

[0036] (5) Specifically, the wedge mechanism 43 is composed of a hole 43a provided between the rail 51 and the upper surface of the cutting hole 4, a wedge portion 43b inserted into the hole 43a, and an umbrella portion 43c for operating the excavator that is integrated with the wedge portion 43b. Therefore, the fixing / release can be easily performed by the bucket 20 of the excavator 2.

[0037] (6) In addition, it is preferable that the blade opening 4 further has a hook mechanism 44 which prevents the blade opening 4 from sliding downward along the rail 51 due to gravity when in the retracted position P1 so as to prevent the blade opening 4 from slipping downward due to gravity.

[0038] (7) More specifically, the hook mechanism 44 is composed of a hook portion 44a rotatably supported on the upper portion of the blade hole 4 and biased in a direction to hook onto the upper end of the rail 51, and a receiving portion 44b for operating the excavator that is linked to the hook portion 44a. Therefore, the hook mechanism 44 can be easily operated for hooking / unhooking by the bucket 20 of the excavator 2.

[0039] Although an embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not deviate from the gist of the present invention are included in the present invention.

[0040] For example, in the embodiment, the wedge mechanism 43 of the cutting tool nozzle 4 and the hook mechanism 44 are fixed / released and hooked / released by operating the bucket 20 of the excavator 2, respectively. However, this is not limited to this, and the operation can also be performed by human power, although this is somewhat less swift.

[0041] In addition, in the embodiment, a small circular pneumatic caisson 1 has been used as an example, but this is not limited to this, and the movable cutting edge device 3 of the present invention can be applied to pneumatic caisson 1 of any shape and size.

[0042] Although not described in the embodiment, dirt that may get into and clog the rail 51 can be removed by sliding the blade opening 4 up and down several times, so that the blade can be restored to a state where it can fully function. In addition, for example, a means for blowing away dirt from within the rail 51 using air can be added. [Explanation of symbols]

[0043] 1 Pneumatic caisson 10 side wall 11 Blade mouth 12 Working room slab 13 Work Room 14 Material Shaft 15 Material Rock 18 Soil bucket 2. Excavator 20 Buckets 3. Mobile blade attachment device 4. Blade opening 40 Main body 41 Base 43 Wedge Mechanism 43a Hole 43b Wedge 43c umbrella section 43d (reinforcing) steel plate 44 Hook mechanism 44a Hook part 44b Receiving part 44c spring 5 Moving mechanism 50 Base 51 Rail P1 Evacuation position P2 resistance position

Claims

1. A plurality of tipped cutting holes are installed on the workroom side of the cutting hole of the pneumatic caisson; a plurality of movement mechanisms for the cutting edge nozzles, the cutting edge nozzles being movable between a retracted position at an upper portion of the cutting edge nozzles and a resistance position at a lower portion of the cutting edge nozzles; the moving mechanism is composed of a rail extending obliquely in an up-down direction along the working chamber side of the cutting edge, and a base portion integrated with the cutting edge and fitted to the rail so as to be slidable thereon; The moving mechanism is adapted to be movable between the retracted position and the resistance position by the operation of an excavator arranged in a work chamber.

2. 2. The movable blade attachment device according to claim 1, further comprising a wedge mechanism that prevents the blade attachment hole from sliding upward along the rail due to a resistance force received from the ground at the resistance position.

3. 3. A mobile blade attachment device as described in claim 2, wherein the wedge mechanism is composed of a hole portion provided between the upper surface of the blade attachment hole and the rail, a wedge portion to be inserted into the hole portion, and an umbrella portion for operating an excavator that is integrated with the wedge portion.

4. 4. A movable blade attachment device as described in any one of claims 1 to 3, wherein the blade attachment hole further has a hook mechanism that prevents the blade attachment hole from sliding downward along the rail due to gravity in the retracted position.

5. 5. A mobile blade attachment device as described in claim 4, wherein the hook mechanism is composed of a hook portion rotatably supported on the upper part of the blade attachment hole and biased in a direction to hook onto the upper end of the rail, and a receiving portion for operating an excavator connected to the hook portion.

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