JP7340238B2 - Hydraulic hose holding device and drilling method - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Date of use of the invention: March 25, 2019, Place of use: From Higashi-Okisu, Tokushima City, Tokushima Prefecture to Shinmachi River, Construction name: FY 2017-2019 Lower part of Shinmachi River Bridge (Part 1) construction

The present invention relates to a device used in excavation construction using a hydraulic excavation device, and a device for holding hydraulic hoses connected to the excavation device in an aligned state.
The present invention relates to an excavation method using this hydraulic hose holding device and a hydraulic excavation device.

BACKGROUND ART When press-fitting steel pipes such as casing pipes and steel pipe sheet piles, a method of inserting a drilling device into the inside of the steel pipes and performing medium excavation has been commonly used. As shown in FIG. 11, medium digging is an excavation method in which an excavator is inserted inside steel pipes to excavate inside or below the steel pipes. An example of such an excavation method is disclosed in Patent Document 1 (Utility Model Registration No. 3145827).

The excavating device for medium digging (medium digging device) disclosed in Patent Document 1 is a hydraulically driven excavating device, and is used while suspended by a crane, as shown in the enlarged view of FIG. 12. ,
・Capsule pipe 61 that takes excavated soil inside and temporarily stores it;
- A screw 62 rotatably provided inside the capsule pipe 61,
- a rotational drive device 63 for rotating this screw 62;
etc.

As schematically shown in FIG. 11, this hydraulically driven excavation device 6 is connected to a hydraulic unit 5, which is a hydraulic oil supply source, via a plurality of hydraulic hoses 3. That is, the drilling equipment 6 is configured to receive hydraulic oil (pressure oil) from the hydraulic unit 5 via the hydraulic hose 3 and to operate using this hydraulic oil.

Excavated soil is taken into the capsule pipe 61 (excavated soil storage section) of the excavation device 6 as the medium excavation progresses, and is stored until it is discharged out of the hole. The screw 62 serves to lift up the excavated soil taken into the capsule pipe 61 and to confine the excavated soil within the capsule pipe 61 using its screw fins 64 . The upper end side of the screw shaft 65 is connected to the rotational drive device 5.

In medium digging using the drilling equipment with the above configuration, for example, as shown in FIG. The equipment is operated hydraulically to excavate inside or below the steel pipes.

Then, when the capacity of the capsule pipe 61 becomes full by continuing to use the excavation device to excavate, the excavation device 6 is once lifted up by a crane and moved to the outside of the steel pipes. After turning the crane to a predetermined position, the screw 62 is reversely rotated above a predetermined soil discharge position such as a soil discharge vessel, and the excavated soil stored in the capsule pipe 61 is discharged from the capsule pipe. (remove soil)

When the earth removal from the capsule pipe 61 is completed, the excavation device 6 is again suspended by a crane and inserted inside the steel pipes to excavate the inside of or below the steel pipes.

In other words, in medium excavation using the excavation device 6 described above, the following series of steps (insertion → excavation → pulling up → removal of earth) is repeated many times to excavate inside or below the steel pipes to a specified level. Continue until depth is reached.

・Insertion of drilling device 6 into steel pipes
↓
・Excavation inside or below steel pipes (medium digging)
↓
・Hoisting of drilling rig 6
↓
・Earth removal outside steel pipes

Utility model registration No. 3145827

In medium excavation using the hydraulically driven excavation equipment (medium excavation equipment) as described above, the excavation equipment is repeatedly moved in and out of steel pipes while accompanied by a hydraulic hose connected to a hydraulic unit. It is necessary to repeat the series of steps: → excavation → pulling up → soil removal.
However, in construction work in which a drilling rig accompanied by a hydraulic hose is repeatedly put in and taken out (medium excavation), if the hydraulic hose connected to the drilling rig is not handled in any way, the hydraulic hose may be damaged during the repeated putting in and taking out of the drilling rig. There is a possibility that you will receive it.

Furthermore, for example, in the case of so-called long-length construction, such as casting a long casing pipe as schematically shown in FIG. When excavating inside casing pipes or pile materials), it is necessary to use a long hydraulic hose.
Therefore, the hydraulic hose connected to the excavation equipment inevitably becomes longer, and the weight of the hydraulic oil flowing inside increases, making it extremely difficult to manage the hydraulic hose in such construction.
For example, in order to perform medium-sized excavation of 80 m, a hydraulic hose of about 100 m (80 m + extra length (10 to 20 m)) will be interposed between the hydraulic unit and the excavation equipment. When the drilling rig reaches the bottom of the 80m hole, only the extra length remains on the ground, but if the drilling rig is moved in and out each time as mentioned above, 100m of hydraulic hoses will be left cluttered on the ground. The hydraulic hose becomes more difficult to handle because it becomes like a rope and has to be dragged to remove soil.

In addition, if hydraulic pressure is required for the basic operation of many parts of the drilling rig, it is necessary to connect multiple hydraulic hoses to the drilling rig, and if the length of these hydraulic hoses becomes long, , the entire hydraulic hose becomes bulky (and the weight of the hydraulic oil is added), and the weight becomes significantly large.
The bundle of long and heavy hydraulic hoses is dragged on the ground every time the drilling equipment is moved in and out of the casing pipe, and the resistance it receives during this process causes the hydraulic hoses to There is a risk that the hydraulic hose may come off, and if the hydraulic hose is dragged on the ground, there is a risk that it may become ruptured due to abrasion with the ground.
In addition, when multiple hydraulic hoses are connected to the drilling equipment and become long, the weight of the hoses (+ hydraulic oil) increases, and strong tensile force is applied to the hydraulic hoses during the installation process, causing them to stretch and break. There is a possibility that it may cause a shortened lifespan.
Furthermore, these heavy and long hydraulic hoses are swung around irregularly on the ground every time the drilling equipment is moved in and out of the casing pipe, posing a danger to surrounding workers. There is also a risk that the equipment kept there may be vandalized and pose a danger.

In view of the problems of the prior art mentioned above, the purpose of the invention of this application is to:
During excavation work using hydraulic drilling equipment, it is important to keep the hydraulic hose connected to the drilling equipment in good condition.
It is possible to handle the hydraulic hose so that it does not disturb the construction site on the ground,
Regardless of the length of the hydraulic hose (even if the hydraulic hose becomes long), the handling of the hydraulic hose is made easy;
An object of the present invention is to provide a hydraulic hose holding device and an excavation method.

The above purpose is
A device for holding a hydraulic hose connected to a hydraulic drilling rig, the device comprising:
A crane-suspended movable sheave device configured to be movable in the vertical direction;
It has a fixed sheave device that can be installed at any position (depending on the construction site),
This is achieved by a hydraulic hose holding device configured to allow a hydraulic hose to be stretched between the movable sheave device and the fixed sheave device.

In the above hydraulic hose holding device, the movable sheave device may have a plurality of sheaves around which the hydraulic hose is routed.

In addition, the fixed sheave device included in the hydraulic hose holding device is
A sheave that runs the hydraulic hose,
The sheave holding portion may be configured to hold the sheave and change direction following the rotation of the crane.

In addition, the movable sheave device included in the hydraulic hose holding device includes:
A cover may be installed to protect the hydraulic hoses and crane wires.

Further, the hydraulic hose holding device may include a pulling device for pulling the hydraulic hose located between the hydraulic power source and the movable sheave.

Further, the hydraulic hose holding device may include a hydraulic hose protection means for protecting the hydraulic hose. The hydraulic hose protection means is arranged to receive on behalf of the hydraulic hose the tensile forces that the hydraulic hose would otherwise experience.

In addition, the purpose mentioned above is
An excavation method using a hydraulic hose holding device and excavation device having the above characteristics,
In a drilling method in which a crane-suspended drilling rig is repeatedly moved in and out of the borehole,
When the drilling rig is lowered, the crane-suspended movable sheave device is brought closer to the fixed sheave device so that the length of the hydraulic hose held between the movable sheave device and the fixed sheave device is shortened.
moving the crane-suspended movable sheave device away from the fixed sheave device so that when the drilling rig is raised, the length of the hydraulic hose held between the movable sheave device and the fixed sheave device is increased;
This is achieved by

The hydraulic hose holding device of the present invention is mainly composed of a crane-suspended movable sheave device and a ground-mounted fixed sheave device.
In excavation work using a hydraulic excavation device, by using such a hydraulic hose holding device in combination, it becomes possible to handle the hydraulic hose connected to the excavation device.
Furthermore, in the present invention, the fixed sheave device is not permanently attached to crane equipment or the like, but can be installed at any position on the ground side depending on the site situation. That is, the installation position can be changed if necessary. Therefore, it is necessary to handle the hydraulic hose that runs between the movable sheave device and the fixed sheave device so that it does not interfere with the excavation work using the excavation equipment (preferably so that it does not come into excessive contact with the excavation equipment, etc.). The condition of the hydraulic hose (position, orientation, inclination, etc.) can be optimized.
In particular, under construction conditions where there is a distance between the crane and the excavation location, it is necessary to raise and lower the crane boom, but in the present invention, the fixed sheave device is installed at any position on the ground side, so the crane boom can be raised and lowered. The positional relationship between the movable sheave device and the fixed sheave device (the state of the hydraulic hose held between them) can be optimized by taking into account various conditions such as the following.
Furthermore, in the present invention, the movable sheave device can be used by simply hanging it with a crane, and the fixed sheave device is a ground-mounted type (rather than being fixed to a crane). There is no need to make any modifications to existing crane equipment (for example, attaching a fixed sheave device to the crane equipment), and the present invention can be used with the existing crane equipment as it is.

Moreover, the hydraulic hose holding device of the present invention has a plurality of sheaves around which the hydraulic hose is wrapped. The hydraulic hose is routed through these multiple sheaves in sequence.
Thereby, the length of the hydraulic hose held between the movable sheave device and the fixed sheave device can be ensured to be long. As a result, it becomes possible to pay out a long hydraulic hose from the hydraulic hose holding device as needed, so according to the present invention, long and deep excavation work using a hydraulically driven excavation device is possible. It can also correspond to
In other words, in the present invention, the movable sheave device is provided with a plurality of sheaves through which hydraulic hoses are hung around, so that the movable sheave device can be held within the vertical movable range defined by the boom length of the crane used. The length of the hydraulic hose can be increased by extending at least a length corresponding to the movable range.
As a result, for example, in medium excavation when driving deep (and therefore long) casing pipes, the hydraulic hose connected to the excavation equipment becomes long and difficult to handle, whereas the boom length of the crane By making the length longer as necessary, you can obtain a proportionally longer movement range (length). can hold hydraulic hoses, making it easy to handle long hydraulic hoses.
Similarly, even if a crane boom is restricted from increasing its length due to a certain free head restriction, the movement range (length) of the movable sheave device obtained from the allowable boom length at the site will not be exceeded. By hanging it around, you can hold the maximum length of hydraulic hose.

Further, in the hydraulic hose holding device of the present invention, the fixed sheave device has a sheave holding portion configured to change direction following the rotation of the crane. As a result, the fixed sheave installed on the ground side can rotate (that is, swing) in a plane (horizontally). Therefore, since the held hydraulic hose can freely change its direction with respect to the swinging motion of the crane, twisting of the hydraulic hose is suppressed, and no damage to the hydraulic hose is caused.

Further, in the hydraulic hose holding device of the present invention, a cover for protecting the hydraulic hose and crane wire is attached to the movable sheave device. This prevents damage to hydraulic hoses and crane wires during construction.

Further, in the hydraulic hose holding device of the present invention, the hydraulic hose holding device may include a pulling device for pulling the hydraulic hose located between the hydraulic power source and the movable sheave. This pulling device grips a hydraulic hose (any part) located between the hydraulic power source and the movable sheave and continuously applies a pulling force. This further improves the handling of the hydraulic hose by the hydraulic hose holding device.

Further, the hydraulic hose holding device of the present invention may include a hydraulic hose protection means for protecting the hydraulic hose. The hydraulic hose protection means is arranged to receive on behalf of the hydraulic hose the tension that the hydraulic hose would otherwise experience. By providing such a hydraulic hose protection means, most of the tensile force during excavation work can be absorbed by the hydraulic hose protection means, so that the hydraulic hose can be protected from breaking due to the tensile force.

Furthermore, in the excavation method of the present invention using a hydraulic hose holding device,
When the drilling rig is lowered, the crane-suspended movable sheave device is brought closer to the fixed sheave device so that the length of the hydraulic hose held between the movable sheave device and the fixed sheave device is shortened.
When the excavation rig is raised, the crane-suspended movable sheave device is moved away from the fixed sheave device so that the length of the hydraulic hose held between the movable sheave device and the fixed sheave device is increased.
This makes it easier to handle long and heavy hydraulic hoses during excavation work such as medium excavation, where crane-suspended drilling equipment is frequently moved in and out of the borehole. Not only can the hydraulic hose protect the construction site, but the construction site can also be kept safe by preventing damage to the construction site.

FIG. 2 is a side view showing a state of excavation work (during excavation) using both a hydraulic excavation device and a hydraulic hose holding device, and a portion thereof is shown in a perspective view. FIG. 2 is a side view illustrating excavation work (during earth removal) using both a hydraulic excavation device and a hydraulic hose holding device, and a portion thereof is shown in a perspective view. FIG. 1A is a plan view corresponding to the side view of FIG. 1A, and is a plan view illustrating excavation work (during excavation) using both a hydraulic excavator and a hydraulic hose holding device. FIG. 1B is a plan view corresponding to the side view of FIG. 1B, and is a plan view illustrating excavation work (during earth removal) using both a hydraulic excavator and a hydraulic hose holding device. FIG. 2 is a side view (perspective view) and a plan view showing a "movable sheave device" included in the hydraulic hose holding device. They are a side view (perspective view) and a plan view showing a "fixed sheave device" included in the hydraulic hose holding device. FIG. 7 is a side view showing another example of how the fixed sheave device is installed. They are a side view (perspective view) and a plan view showing a "hydraulic hose protection device" included in the hydraulic hose holding device. FIG. 2 is a side view schematically showing an example of the layout of a movable sheave device and a fixed sheave device included in the hydraulic hose holding device and the number of sheaves held. FIG. 7 is a side view schematically showing another example of the layout of the movable sheave device and the fixed sheave device included in the hydraulic hose holding device and the number of sheaves held. FIG. 7 is a side view schematically showing another example of the layout of the movable sheave device and the fixed sheave device included in the hydraulic hose holding device and the number of sheaves held. FIG. 2 is a conceptual diagram schematically showing the operation of a hydraulic hose holding device during excavation construction using a hydraulic excavation device. FIG. 2 is a side view showing a state of conventional excavation construction using a hydraulic excavation device. FIG. 1 is a side view schematically showing the configuration of a hydraulic excavation device, with a portion shown in a perspective view.

(Configuration of hydraulic hose holding device)
First, the configuration of the hydraulic hose holding device will be explained based on FIGS. 1 to 4.

A hydraulic hose holding device is a device used in excavation construction using a hydraulically driven excavation device, and is a device for holding and handling a hydraulic hose connected to the excavation device. The hydraulic hose referred to in this application regarding the present invention includes not only a single hydraulic hose but also a combination of multiple hydraulic hoses arranged in parallel, that is, a combination of multiple hydraulic hoses. It also includes items made up of bundles (hydraulic hose groups).

An example of the hydraulically driven excavating device 6 has been explained in relation to FIG. 12, so the explanation thereof will be omitted in this embodiment, and the explanation related to FIG. 12 will be described as a specific example of the hydraulically driven excavating device. I will use it.

The hydraulic hose holding device of this embodiment is
As a pair of sheave devices facing each other in the vertical direction,
- A movable sheave device 1 (suspended sheave device) that is suspended by a crane and located in the air;
・Fixed sheave device 2 (ground sheave device) installed at any position on the ground side,
have.

This hydraulic hose holding device is configured so that the length of the hydraulic hose to be held can be changed depending on the relative distance between the movable sheave device 1 and the fixed sheave device 2.

The "movable sheave device 1" included in the hydraulic hose holding device is configured so that it can be suspended using a wire rope 71 and a hook 72 provided in the crane equipment. Therefore, the movable sheave device 1 is not only movable in the vertical direction (not limited to the vertical direction but also includes the inclined vertical direction) by letting out or hoisting the wire rope 71 of the crane equipment. It can be moved freely in any direction by turning the crane equipment or raising and lowering the boom.

This movable sheave device 1, as shown in FIGS. 1 and 3,
・A plurality of sheaves 11 and 12 with different rotation axes, on which hydraulic hoses can be hung,
- A sheave holding section 13 that holds each of the plurality of sheaves in a freely rotatable state;
have.

The plurality of sheaves included in the movable sheave device 1 have different rotation axes, and are provided so as to be independently rotatable. In this embodiment, a first sheave 11 and a second sheave 12 are provided in the movable sheave device 1 as an example of a plurality of sheaves having different rotation axes. The hydraulic hose 3 is sequentially routed around the plurality of sheaves having different shafts. That is, the hydraulic hose 3 is routed around each sheave so as to pass through a plurality of sheaves having different shafts in order.

The sheave holding section 13 is not particularly limited in its shape and other specific configurations as long as it can rotatably hold a plurality of sheaves with different rotation axes. For example, the sheave holding portion may be constructed of a sufficiently rigid bracket. In this case, a plurality of sheaves included in the movable sheave device 1 are integrally connected (held and ) may be done.

Further, in this embodiment, the sheave holding section 13 is configured to also function as a cover for protecting the hydraulic hose and wire rope. In addition, as mentioned above, when the sheave holding part is constituted by a bracket (branch), the cover that protects the hydraulic hose and wire rope may be constructed integrally with the bracket (branch).

In addition, when a plurality of hydraulic hoses (in parallel) are held and handled by the hydraulic hose holding device, the plurality of hydraulic hoses are tied into one bundle and wrapped around the sheaves 11 and 12. It's okay.
However, when a plurality of long (for example, 100 m long) hydraulic hoses are hung on the sheaves 11, 12, the weight of the hoses (+hydraulic oil) increases by the length of the plurality of long hoses. Therefore, when a bundle of hydraulic hoses is hung on the sheaves 11 and 12, the length of the arc (the length of the R part) changes between the sheave side and the opposite side, so a strong tensile force is applied to the hose located on the outside. Elongation occurs, causing damage and shortening the lifespan. In other words, there is a concern that as the number of hydraulic hoses becomes longer and longer, the burden becomes more burdensome.
Therefore, as shown in the side view of FIG. 3, the sheaves 11 and 12 provided in the movable sheave device 1 are each configured with a multiple type (double wheel type) sheave (a combination of a plurality of coaxial individual sheaves). is also possible.
For example, when holding nine hydraulic hoses (nine hydraulic hoses make up a set of hydraulic hoses), nine coaxial individual sheaves are combined in a multiple system (double vehicle system), and sheaves 11, 12 Alternatively, one hydraulic hose may be individually (individually) routed around each individual sheave. In this way, even if there are multiple hydraulic hoses and the length is long, the hydraulic hoses can be routed one by one to each individual sheave (separately to each coaxial individual sheave) to avoid the damage to the hydraulic hoses mentioned above. The risk of shortening lifespan is reduced.

A "fixed sheave device 2" that is paired with the movable sheave device 1 is installed at an arbitrary position on the ground side depending on the site situation. This fixed sheave device 2 is not permanently (immovably) attached to, for example, crane equipment, but is installed at an arbitrary position depending on the situation at the site. Therefore, the installation position can be changed as necessary during construction.
Here, "above ground" or "any position on the ground side" is not necessarily limited to directly above the ground, but may include structures that have already been installed (for example, existing steel pipe sheet piles, work platforms made of temporary piers, etc.). It is intended to cover a wide range of structures, including the tops of various types of heavy equipment (including work barges, scaffolding, construction foundations, etc.). The latter "installed structures" include, for example, existing structures such as steel pipe sheet piles that protrude above the water.

This fixed sheave device 2 receives a tensile force from the movable sheave device 1 that moves up and down, so it must be secured by any method (such as various fastening materials, fixing materials, weights, chuck devices, etc.) not shown in the figure to prevent it from moving from its installed position. Fixed on the ground side.

The fixed sheave device 2, as shown as an example in FIG.
・Sheave 21 that runs around the hydraulic hose,
- A sheave holding part 23 for rotatably holding this sheave 21,
- A fixed pedestal 25 to which the sheave holding part 23 is fixed and fixed at an arbitrary position on the ground side;
have,

The sheave holding section 23 is constituted by a revolving body, and can change direction following the rotation of the crane.
In addition, when the rotation (oscillation) of the sheave holding part 23 of the fixed sheave device is made to follow the movement of the movable sheave device 1 suspended by a crane boom (substantially pulled by the hydraulic hose 3 due to the rotation of the crane), This tension may cause damage to the hydraulic hose 3. As a countermeasure against this, an actuator (not shown) such as a cylinder or a motor may be provided in the fixed sheave device 2, and the sheave holding portion 23 may be rotated using the power of this actuator.

The fixed frame 25 rotatably holds the sheave holding part 23, which is a revolving body, and is fixed to an arbitrary position on the ground side by an arbitrary method not shown (for example, various fastening materials, fixing materials, weights, chuck devices, etc.). Fixed.

In addition, when holding and handling multiple (parallel) hydraulic hoses with a hydraulic hose holding device, tie the multiple hydraulic hoses into one bundle and hang it on the sheave 21 of the fixed sheave device 2. You may also rotate it.
However, when a plurality of long (for example, 100 m long) hydraulic hoses are hung on the sheave 21, the weight of the hoses (+hydraulic oil) increases by the length of the plurality of long hoses. Therefore, for example, if a plurality of hydraulic hoses arranged in a substantially circular shape and bundled into a single cord is hung on a sheave, the length of the circular arc (R section) will be As the length of the hose changes, a strong tensile force is applied to the hose on the outside (centrifugal) side, causing elongation, which can cause damage or shorten the lifespan of the hose. In other words, there is a concern that as the number of hydraulic hoses becomes longer and longer, the burden becomes more burdensome.
Therefore, the sheave provided in the fixed sheave device may be constructed of a multiple sheave (double wheel type) (a combination of a plurality of coaxial individual sheaves).
For example, when holding nine hydraulic hoses (nine hydraulic hoses make up one set), the sheave 21 is constructed by combining nine coaxial individual sheaves in a multiple (double wheel type) system. However, one hydraulic hose may be placed around each individual sheave (individually). In this way, even if there are multiple hydraulic hoses and the length is long, the hydraulic hoses can be routed one by one to each individual sheave (separately to each coaxial individual sheave) to avoid the damage to the hydraulic hoses mentioned above. The risk of shortening lifespan is reduced.

The movable sheave device 1 and the fixed sheave device 2 are positioned to face each other in the vertical direction, but the straight line (imaginary line) connecting the movable sheave device 1 and the fixed sheave device 2 is slightly inclined as illustrated in FIG. If both devices 1 and 2 face each other in a positional relationship, there is a risk that the hydraulic hose 3 held between both devices 1 and 2 may become slack due to the weight of the hydraulic hose itself, causing it to bend significantly. There is. As described above, if the hydraulic hose is greatly curved and loosened between the movable sheave device and the fixed sheave device, there is a risk that the hydraulic hose holding device will not operate as designed. The specific operation of the hydraulic hose holding device will be described later based on FIG. 10.

Therefore, the hydraulic hose holding device of this embodiment is a hydraulic hose that pulls the hydraulic hose through a hydraulic hose holding section (hydraulic hose band) 41 at a predetermined position, for example, a position between the hydraulic power source and the movable sheave. It has a tensioning device 4 (tag line).

First, this hydraulic hose tensioning device 4 (tag line) suppresses the occurrence of "sagging/large curvature" in the hydraulic hose 3 stretched between the movable sheave device 1 and the fixed sheave device 2. has a role to play.

In addition, since the end of the hydraulic hose 3 is connected (connected) to the hydraulic unit 5, which is a hydraulic power source, handling of the hydraulic hose depending on the construction situation is generally done at the connection part. This is a load-bearing action. Therefore, by continuously pulling the hydraulic hose 3 with the tensioning device 4 via the hydraulic hose holding part (hydraulic hose band) 41 at a position between the hydraulic unit 5 and the movable sheave device 1 as described above, the hydraulic pressure can be increased. The connecting portion with the unit 5 can be protected from any load.

Furthermore, when the hydraulic hose holding device of this embodiment is suspended by a crane, the position of the hydraulic hose holding device can be moved or rotated by operating the hydraulic hose pulling device 4. This makes it possible to finely adjust the position of the hydraulic hose and the hydraulic hose holding device so that they do not come into contact with other peripheral devices.
For example, when deep excavation is carried out, a long hydraulic hose that extends the excavation is suspended vertically in the hole of steel pipes (steel pipe piles, steel pipe sheet piles, excavation casing, etc.). In response to the phenomenon in which the hydraulic hose holding device is pulled inward by the own weight of the length of the hydraulic hose (and hydraulic oil), the hydraulic By being able to pull the hose appropriately, the above-mentioned hydraulic hose holding device is optimal (for smooth delivery and retraction of the hydraulic hose without being affected by contact with other equipment or resulting work stagnation). It is constructed so that it can remain in a fixed position.

The hydraulic hose pulling device 4, which plays the above role, is securely installed and fixed on the ground side near the hydraulic unit 5 by any method not shown (for example, various fastening materials, fixing materials, weights, chuck devices, etc.) - Hydraulic unit a hydraulic hose holding part 41 that grips and holds the hydraulic hose 3 connected to the hydraulic hose 5;
- A wire rope 43 connected to the hydraulic hose holding part,
- It has a main body 45 equipped with a winch (not shown) for winding up and letting out the wire rope.

The hydraulic hose holding portion 41 (hydraulic hose band) is, for example, a band-type member that is fixed to and integrated with the hydraulic hose 3 while sandwiching the hydraulic hose 3 therein.

One end of the wire rope 43 is connected to the hydraulic hose holding part 41, and the other end is connected to a winch (not shown) of the pulling device main body 45.

The main body 45 equipped with a winch is fixed on the ground side to ensure reaction force for pulling.

The winch included in the main body 45 of the hydraulic hose pulling device always applies a pulling force to the wire rope 43 so that the hydraulic hose 3 stretched between the movable sheave device 1 and the fixed sheave device 3 is always under an appropriate tension. Apply. This suppresses slack in the hydraulic hose 3 between the movable sheave device 1 and the fixed sheave device 2. As a result, as illustrated in FIGS. 1A and 1B, the movable sheave device 1 and the fixed sheave device 2 face each other in a positional relationship in which the straight line (imaginary line) connecting them is slightly inclined. Hydraulic hose holding device operates as designed even under various circumstances.

In this embodiment, since the hydraulic hose 3 (and the movable sheave device 1 of its holding device) is suspended by a crane, the positional relationship between the movable sheave device 1 and the fixed sheave device 2 can be set at any distance or An angle is created, at which time a lateral tension is applied to the holding hydraulic hose 3.
Therefore, the hydraulic hose holding device may include a hydraulic hose protection device that functions as a hydraulic hose protection means for protecting the hydraulic hose 3.
An example of a hydraulic hose protection device is shown in FIG.

The hydraulic hose protection device 8 shown in FIG. 6 is provided to receive instead of the hydraulic hose 3 the tensile force that would otherwise be experienced by the hydraulic hose 3 (in the absence of the hydraulic hose protection means).

This hydraulic hose protection device 8 is
A wire 81 that is a flexible and easy-to-bend wire that receives tensile force;
Shackles 82 and 83 connected to wire 81;
It has a swivel 84 for eliminating twisting of the wire 81.

In this embodiment, two sets of hydraulic hose protection devices 8 having such a configuration are provided, one set each on both sides of the hydraulic hose 3, as shown in FIG. 6. In this embodiment, the hydraulic hose protection device 8 is provided on both outer sides of the hydraulic hose 3, but it may be provided only on one side. Further, in this embodiment, hydraulic hoses arranged in parallel (hydraulic hose group) are protected, but the protection target is not limited to this, and this protection device can be used for the purpose of protecting a single hydraulic hose. is also possible.

Among the many shackles, the shackle 82 is connected to the hydraulic hose holding part 41 (hydraulic hose band) of the hydraulic hose tensioning device.

The hydraulic hose 3 normally undergoes constant changes over time due to high pressure, temperature changes, and tension. On the other hand, the entire length of the wire 81 is set so that the hydraulic hose 3 to be protected is neither too loose nor too tensioned. As a result, during excavation work, tension is applied to the wire 81 before the hydraulic hose 3 to pull up the hydraulic hose. In this way, by providing the wire 81 (a wire rod that receives tension) as a substitute for the hydraulic hose 3 to be protected, the hydraulic hose itself can be protected.

For example, if the rubber hydraulic hose 3 becomes stretched during the construction process due to repeated expansion and contraction due to winding/feeding operations or hydraulic circuit operation, adjustment can be made using a shackle, short wire, etc. In this case, the wire length can be adjusted, for example, at the hydraulic hose band 41.

Note that the hydraulic hose protection device 8 including the wire, shackle, swivel, etc. described above is an example of a hydraulic hose protection means, and its configuration is not limited to this. For example, it is also possible to employ a chain (instead of a wire) as the wire that receives the tensile force instead of the hydraulic hose.
However, it is preferable to use a wire instead of a chain such as a drive chain or roller chain, which is structurally limited to the direction of bending by a pin that serves as the axis of link bending, so that the crane can turn freely. It is possible to obtain the protection performance of a hydraulic hose that bends accordingly.

(Setting of hydraulic hose holding device)
In the embodiment shown in FIGS. 1A and 1B, an excavator wire rope 70 and a movable sheave device wire rope 71 hang from a sheave at the tip of a boom of a crawler crane, which is an example of crane equipment. These wire ropes 70, 71 are connected to a winch included in the crane so that they can be independently paid out and hoisted. That is, in this embodiment, it is assumed that a hydraulic excavation device and a hydraulic hose holding device are used together in one crane facility. This simplifies construction equipment and reduces construction costs compared to the case where separate crane equipment is used.

A hook 73 is provided at the tip of the excavator wire rope 70, and the excavator 6 is suspended via the hook. This excavation device 6 can be raised or lowered at any time using a winch attached to the crane.

A hook 72 is provided at the tip of the movable sheave device wire rope 71, and the movable sheave device 1 is suspended via the hook. This movable sheave device 1 can be raised or lowered at any timing (irrespective of whether the excavation equipment 6 is raised or lowered) using a winch installed in the crane. That is, the movable sheave device 1 can be moved up and down independently of (in parallel with) the up and down movement of the hook 73 for suspending the excavation device 6.

The fixed sheave device 2 is fixed on the ground side so as to be located below the movable sheave device 1 that moves up and down.
In the embodiment shown in FIGS. 1A and 1B, the fixed sheave device 2 is fixed on the ground that is the construction base, but the location where the fixed sheave device 2 is fixed is not limited to this.
For example, when driving steel pipe sheet piles, the fixed sheave device 2 may be installed at the top of the already driven steel pipe sheet piles, as illustrated in FIG. 5, in order to further improve workability.
In particular, steel pipe sheet pile driving work is often carried out on water, so when fixing the fixed sheave device 2 on the work platform (pier), the distance from the pile to be driven (pile center) is large. The horizontal distance between the pile center and the fixed sheave device is large. Under such conditions, for example, the hydraulic hose 3 that is hung between the movable sheave device 1 and the fixed sheave device 2 hanging near the pile center position becomes long and its posture is ( ) Due to the excessive inclination, the movable sheave device 1 will not only sag downward due to its own weight but also be affected by handling such as maintaining the posture of the movable sheave device 1, resulting in unstable operation. This increases the number of times the hose is pulled too hard, which can easily cause damage to the hydraulic hose.
Therefore, as shown in FIG. 5, for example, by fixing the fixed sheave on the already cast steel pipe sheet pile in the vicinity of the steel pipe sheet pile being placed, it is possible to suppress excessive tensile force from being applied to the hydraulic hose 3. As a result, it contributes to the protection of the hydraulic hose (therefore extending its life).

In this embodiment, the number of sheaves each of the movable sheave device 1 and the fixed sheave device 2 are provided is determined so as to satisfy the following relationship.
That is, in the hydraulic hose holding device of this embodiment, as schematically illustrated in FIG. It is assumed that the number of sheaves (sheaves around which hydraulic hoses are routed) that the device 1 is equipped with is N+1. Here, N is an integer of 1 or more.
Note that although FIG. 7 illustrates the case where N=2, N is not particularly limited as long as it is an integer greater than or equal to 1, so for example, as illustrated in FIG. 8, a layout with N=3 may be adopted. is also possible.
By providing the fixed sheave device and the movable sheave device each with a sheave so as to satisfy such a relationship, it becomes easy to design the hydraulic hose holding device according to the length of the hydraulic hose to be held.

Note that the above-mentioned relationship (the number of sheaves each of the movable sheave device 1 and the fixed sheave device 2 have) is an example adopted in this embodiment, and is not intended to limit the present invention to this.
For example, as schematically illustrated in FIG. The number of sheaves may be set to N. Here, N is an integer of 1 or more.

When using the hydraulic hose holding device configured as described above, as shown in FIGS. 1A and 1B, the hydraulic hose 3 is moved back and forth between the movable sheave device 1 and the fixed sheave device 2. 3 is placed between both devices 1 and 2. One end of the hydraulic hose 3 is connected to an excavation device 6, and the other end is connected to a hydraulic unit 5 that supplies hydraulic oil (pressure oil).
Specifically, the hydraulic hose 3 is routed around each sheave so as to alternately pass through the sheave of the movable sheave device 1 and the sheave of the fixed sheave device 2. However, the hydraulic hose that has passed through one sheave is prevented from returning to the same sheave (the first sheave) after passing through another sheave.
In the case of this embodiment, the engagement relationship between the hydraulic hose 3 and the sheaves 11, 12, and 21 (explained sequentially from the hydraulic unit 5 side toward the excavation device 6 in FIG. 1) is that the hydraulic hose 3 is connected to the hydraulic unit 5. The hydraulic hose 3 first passes through the sheave 11 of the movable sheave device 1, then passes through the sheave 21 of the fixed sheave device 2, then passes through the sheave 12 of the movable sheave device 1, and is connected to the excavation device 6. ing.

After the hydraulic hose 3 is stretched between the movable sheave device 1 and the fixed sheave device 2 in the manner described above, the hydraulic hose tension device 4 is connected to the hydraulic hose 3.

The hydraulic hose tensioning device 4 is located near the hydraulic unit 5 and is securely fixed to the ground side by an arbitrary method (for example, various fastening materials, fixing materials, weights, chuck devices, etc.) not shown.
A hydraulic hose holding portion 41 included in this hydraulic hose tensioning device 4 is fixed to the hydraulic hose 3. A hydraulic hose holding section 41 integrated with the hydraulic hose 3 is connected to a winch of a pulling device main body 45 via a wire rope 43. As a result, as illustrated in FIGS. 1A and 1B, the movable sheave device 1 and the fixed sheave device 3 face each other in a positional relationship in which the straight line (imaginary line) connecting them is slightly inclined. Even in such a case, the occurrence of slack in the hydraulic hose 3 between the two devices is suppressed, and the hydraulic hose holding device functions as designed.

(Excavation construction using a combination of hydraulic excavation equipment and hydraulic hose holding device)
First, the operation of the hydraulic excavator during excavation construction will be explained.

As schematically shown in FIG. 2, the hydraulically driven excavation device 6 is connected to a hydraulic unit 5, which is a hydraulic oil supply source, via a plurality of (parallel) hydraulic hoses 3. That is, the drilling equipment 6 is configured to receive hydraulic oil (pressure oil) separately from the hydraulic unit 5 via the plurality of hydraulic hoses 3 and to operate using this hydraulic oil. Note that an example of the hydraulically driven excavation device 6 has been described in relation to FIG. 12, so the description thereof will be omitted in this embodiment, and the description related to FIG. 12 will be referred to.

In medium digging using a hydraulically driven drilling device 6, as shown in FIGS. 1A and 2A, the drilling device 6 is suspended by a crane, inserted inside the steel pipe to be poured, and excavated at the bottom of the hole. The device 6 is operated hydraulically to excavate inside or below the steel pipes. Specific examples of steel pipes include steel pipe piles, steel pipe sheet piles, and casings.

When the capacity of the capsule pipe (excavated soil storage section) is full as the excavation device 6 continues to excavate, the excavation device 6 is lifted up by a crane and placed outside the steel pipes, as shown in Fig. 1B. move it. As shown in FIG. 2B, after turning the crane to a predetermined position, the screw 62 is reversely rotated above the predetermined earth removal position of the earth removal vessel, etc., and the excavated material stored in the capsule pipe 61 is removed. The soil 73 is discharged (discharged) from the capsule pipe 61.

When the removal of earth from the capsule pipe 61 of the excavation equipment is completed, the excavation equipment is again suspended by a crane and inserted inside the steel pipes, as shown in FIGS. 1A and 2A. Excavate below.

That is, in medium digging using the above-mentioned excavation equipment, the following series of steps (insertion → excavation → pulling up → earth removal) is repeated many times to excavate inside or below steel pipes.

・Insertion of drilling equipment into steel pipes
↓
・Excavation inside or below steel pipes (medium digging)
↓
・Hoisting of drilling equipment
↓
・Earth removal outside steel pipes

Next, the operation of the hydraulic hose holding device during excavation work will be explained.
The operation of the hydraulic hose holding device is roughly as follows.

As shown in FIGS. 1A and 1B, when the crane-suspended drilling device 6 is repeatedly put in and taken out of a drilling hole (a hole in the middle of drilling) in steel pipes, the drilling device 6 is lowered as described below. Sometimes, the movable sheave device 1 is lowered at the same time (in parallel), and when the excavation rig 6 is raised, the movable sheave device 1 is raised at the same time (in parallel).

That is, when the excavation device 6 descends, a hydraulic hose of a length that can follow this descending motion is required. Therefore, at the same time as the excavation device 6 is lowered, the movable sheave device 1 is lowered and brought closer to the fixed sheave device 3. As a result, the length of the hydraulic hose 3 held between the movable sheave device 1 and the fixed sheave device 2 (the spanning length between both sheave devices) becomes shorter. Then, by narrowing the relative distance between the two sheave devices, the hydraulic hose is let out from the hydraulic hose holding device, and the paid-out hydraulic hose can follow the descending excavation device 6.

On the other hand, when the excavator 6 ascends, the length of the hydraulic hose becomes redundant as the excavator 6 ascends. Therefore, at the same time as the excavation device 6 is raised, the movable sheave device 1 is pulled up and moved away from the fixed sheave device 2. As a result, the length of the hydraulic hose 3 held between the movable sheave device 1 and the fixed sheave device 2 (the spanning length between both sheave devices) becomes longer. Therefore, by increasing the relative distance between the two sheave devices, the excess length of the hydraulic hose caused by the lifting of the excavation device 6 is taken into the hydraulic hose holding device and can be held by the hydraulic hose holding device.

The moving distance per unit time when the movable sheave device 1 is raised and lowered is the distance traveled per unit time when the excavation equipment 6 is raised and lowered in parallel. The value obtained by dividing by the number of crossings (e.g. 1/4 in the case of Fig. 10) is generally sufficient.

Therefore, by simultaneously raising and lowering the movable sheave device 1 in synchronization with the timing of raising and lowering the excavator 6, the hydraulic hose is always This allows for good handling.

During excavation work, when the hydraulic hose 3 is pulled, the tension is received by the wire 81 (see Figure 6) of the hydraulic hose protection device 8, so the hydraulic hose is protected from breaking. Ru.

Note that the hydraulic hose holding device according to the present invention can also be used in construction using a steel pipe press-in device such as a piler, a full-rotation type all-casing excavator, etc., and the excavation method according to the present invention includes such This also includes aspects such as

Hereinafter, based on FIG. 10, the operation of the hydraulic hose holding device will be specifically described.
It should be noted that FIG. 10 is merely a conceptual diagram drawn primarily to facilitate understanding of the operation of the hydraulic hose holding device.

In the conceptual diagram of FIG. 10, the movable sheave device 1 suspended from the tip of the boom of the crane via a wire rope 71 and a hook 72 can move up and down within the movement range H shown in the figure, and is in an initial state. In (a), it is positioned at the highest position.

In this initial state (a), the hydraulic hose holding device aligns and holds hydraulic hoses with a length equal to the number n of hydraulic hoses to be connected x the maximum movement range H.

In the conceptual diagram of FIG. 10, the maximum movement range of the movable sheave device 1 is set to H, and the hydraulic hose is essentially stretched four times between the movable sheave device 1 and the fixed sheave device 2. There is. Therefore, hydraulic hoses having a maximum length of 4H (=number of hydraulic hoses connected 4×maximum movement range H) can be held in an aligned state by the hydraulic hose holding device.

Then, from the state in which the movable sheave device 1 is fixed at the uppermost position above the upper limit ((a) in FIG. 10), the movable sheave device 1 starts lowering at the same time as the excavation device starts digging ((a) in FIG. 10). (b)).

Specifically, as shown in FIG. 10(b), as the excavation by the excavation device progresses, the hydraulic hose connected to the excavation device is drawn into the excavation hole. That is, as the excavation progresses, the hydraulic hose is fed into the excavation hole. At the same time as this digging, the wire rope 71 is let out, and the movable sheave device 1 suspended by the hook 72 is lowered and brought closer to the fixed sheave device 2. Then, as the movable sheave device 1 approaches the fixed sheave device 2 and the distance between the two devices narrows, the hydraulic hose held between the two devices is let out. Note that the length of the hydraulic hose held by the hydraulic hose holding device becomes shorter as the distance between the movable sheave device 1 and the fixed sheave device 2 becomes narrower. That is, the corresponding length of the hydraulic hose is let out from the hydraulic hose holding device.
Therefore, by moving the movable sheave device 1 close to the fixed sheave device 2 at the same time as the excavation by the excavation rig progresses, the hydraulic hose necessary for the excavation of the excavation rig is paid out from the hydraulic hose holding device, and the hydraulic hose is can follow the device.
In addition, since hydraulic hoses with a maximum length of 4H (= number of hydraulic hoses 4 x maximum movement range H) can be held in an aligned state by the hydraulic hose holding device, the movable sheave device 1 is It can handle excavation lengths that are four times longer than the moving range.
As mentioned above, FIG. 10 is a conceptual diagram drawn primarily to assist in understanding the operation of the hydraulic hose holding device, and shows the length of the hydraulic hose that can be held by the hydraulic hose holding device, so to speak, the device configuration. As a theoretical value that can be considered from the above, the approximate length that increases or decreases depending on the number of times the movement range H is crossed is shown as an integer multiple for convenience.
Therefore, the hydraulic pressure to be maintained depends on various conditions (such as the following), such as the posture and positional relationship of various devices that occur during actual work, the state of the hydraulic hoses, the strength of the tensile force, and the direction in which it is received. This does not preclude the length of the hose from being different from the guideline above.
- The hydraulic hose 3 is directly spanned from the hydraulic source 5 to the movable sheave device 1, and in many cases, the hydraulic hose is spanned in an inclined state, and the hydraulic hose holder (hydraulic A certain amount of slack is provided between the hose band 41 and the hydraulic power source 5 so that no tension is applied.
- The movement range H is such that the movable sheave device 1 is not actually fixedly located directly above the fixed sheave device 2, but is suspended from the crane boom at any position and any posture depending on the work situation. It is a fluid situation.
- The posture of the movable sheave device 1 suspended from the crane boom does not always maintain horizontality as shown in Fig. 10, but due to the dead weight of the hydraulic hose 3 suspended in the aforementioned hole that pulls the hydraulic hose 3. Due to the influence of the tensile force of the hydraulic hose tensioning device 4, the posture differs greatly depending on the work, and therefore the height of each of the attached sheaves 11, 12 from the ground surface differs.
・Due to the direction in which the tensile force is applied, the actual hydraulic hose spanned between the sheaves does not necessarily hang vertically as shown in Figure 10, and due to the flexibility of the rubber material, it does not always hang in the vertical direction. It does not form a strictly vertical line, as it has a deflection of .

Then, when the excavation equipment continues to excavate and the capacity of the capsule pipe (excavated soil storage area) is full, the excavation equipment is lifted up by a crane and moved to the outside of the steel pipes.
At this time, from the state where the movable sheave device 1 has reached the lowest position, the movable sheave device starts to raise at the same time as the excavation equipment starts to be pulled up.

Specifically, as the drilling rig is pulled up, a hydraulic hose connected to the drilling rig is pulled up while connected to the drilling rig and is dragged out of the hole. At the same time as this lifting, the wire rope 71 is wound up and the movable sheave device 1 suspended by the hook 72 is raised and separated from the fixed sheave device 2. Then, as the movable sheave device 1 separates from the fixed sheave device 2 and the distance between the two devices increases, the length of the hydraulic hose held between the two devices increases. Note that the length of the hydraulic hose held by the hydraulic hose holding device increases as the distance between the movable sheave device 1 and the fixed sheave device 2 increases. That is, the length of the hydraulic hose that has been pulled up is taken into the hydraulic hose holding device (between the movable sheave device 1 and the fixed sheave device 2).
Therefore, by raising the movable sheave device 1 and separating it from the fixed sheave device 2 at the same time as pulling up the excavation rig, the extra length of the hydraulic hose expanded by pulling up the excavation rig is taken in by the hydraulic hose holding device.

Therefore, in excavation work using a hydraulic excavation device, by using such a hydraulic hose holding device in combination, it becomes possible to handle the hydraulic hose connected to the excavation device.
Further, in the present invention, the fixed sheave device can be installed at any position on the ground side. Therefore, it is necessary to handle the hydraulic hose that runs between the movable sheave device and the fixed sheave device so that it does not interfere with the excavation work using the excavation equipment (preferably so that it does not come into excessive contact with the excavation equipment, etc.). The condition of the hydraulic hose (position, orientation, inclination, etc.) can be optimized.
In particular, under construction conditions where there is a distance between the crane and the excavation location, it is necessary to raise and lower the crane boom, but in the present invention, the fixed sheave device is installed at any position on the ground side, so the crane boom can be raised and lowered. The positional relationship between the movable sheave device and the fixed sheave device (the state of the hydraulic hose held between them) can be optimized by taking into account various conditions such as the following.
Furthermore, in the present invention, the movable sheave device can be used by simply hanging it with a crane, and the fixed sheave device is installed on the ground (rather than being fixed to a crane). It is not necessary to make any modifications to existing crane equipment (for example, attaching a fixed sheave device to the crane equipment), and the present invention can be used with the existing crane equipment as it is.

1 Movable sheave device (hanging sheave device)
2 Fixed sheave device (ground side sheave device)
3 Hydraulic hose 4 Hydraulic hose tensioning device (tag line)
5 Hydraulic unit (hydraulic source)
6 Hydraulic drilling equipment 8 Hydraulic hose protection device (hydraulic hose protection means)
11 First sheave 12 Second sheave 13 Sheave holding part (cover)
21 Sheave 23 Sheave holding part (swivel body)
25 Fixed frame 41 Hydraulic hose holding part (hydraulic hose band)
43 Wire rope 45 Main body 61 Capsule pipe (excavated soil storage section)
62 Screw 63 Rotation drive device 64 Screw fin 65 Screw shaft 70 Wire rope 71 Wire rope 72 Hook 73 Hook 81 Wire (wire)
82 Shackle 83 Shackle 84 Swivel

Claims (6)

A device for holding a plurality of hydraulic hoses connected to a hydraulic excavation device and bundled in parallel ,
A crane-suspended movable sheave device configured to be movable in the vertical direction;
A fixed sheave device that can be installed at any position on the ground side depending on the site situation and whose installation position can be changed as necessary ;
a hydraulic hose holding part for gripping and holding the hydraulic hose;
The hydraulic hose located between the hydraulic power source and the movable sheave is provided so as to be pulled through the hydraulic hose holding part, and is configured to resist a vertically downward pulling force that increases as the hydraulic excavation rig excavates. a pulling device for pulling the hydraulic hose;
It has
The hydraulic hose holding device is characterized in that the hydraulic hose holder is configured such that the hydraulic hoses , which are combined and bundled in a plurality of lines in parallel, can be hung between the movable sheave device and the fixed sheave device. Device. The movable sheave device has a plurality of sheaves around which hydraulic hoses are routed,
The hydraulic hose holding device according to claim 1, characterized in that: The fixed sheave device is
A sheave that runs the hydraulic hose,
a sheave holding part configured to hold the sheave and change direction according to the rotation of the crane;
The hydraulic hose holding device according to claim 1 or 2, characterized in that: The movable sheave device includes:
A cover is installed to protect the hydraulic hoses and crane wires,
The hydraulic hose holding device according to any one of claims 1 to 3, characterized in that: The hydraulic hose is provided to receive a tensile force in place of the hydraulic hose, and has a hydraulic hose protection means for protecting the hydraulic hose.
The hydraulic hose holding device according to any one of claims 1 to 4 . An excavation method using the hydraulic hose holding device and excavation device according to claim 1,
In a drilling method in which a crane-suspended drilling rig is repeatedly moved in and out of the borehole,
When the drilling rig is lowered, the crane-suspended movable sheave device is brought closer to the fixed sheave device so that the length of the hydraulic hose held by the movable sheave device and the fixed sheave device is shortened.
When the drilling rig is raised, the crane-suspended movable sheave device is moved away from the fixed sheave device so that the length of the hydraulic hose held by the movable sheave device and the fixed sheave device becomes longer;
An excavation method characterized by: