JP2017101384A - Cutting holding device and cutting holding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting holding device and a cutting holding method capable of enhancing working efficiency.SOLUTION: In a cutting holding device 10 having holding means 12 for holding a substantially rod-like cutting object 1 and cutting means 14 for cutting the cutting object 1, and cutting the cutting object 1 in a holding state, the holding means 12 holds the cutting object 1 from the substantially orthogonal direction Y to the extending direction X of the cutting object 1, and the cutting means 14 is arranged on both sides of the holding means 12 at a predetermined interval in the extending direction X from the holding means 12, and in a state of holding the cutting object 1 by the holding means 12, both sides of the cutting object 1 are simultaneously cut by the cutting means 14 on both sides of the holding means 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cutting and gripping apparatus and a cutting and gripping method suitable for cutting out members such as steel frames in, for example, building demolition work.

  Conventionally, steel cutting work in steel building demolition work has been carried out by methods such as force cutting with a steel cutter attachment (crusher) as a heavy machine for demolition, and pulling a steel frame together with gas cutting. However, in such a cutting method, there is a possibility that the force applied by the heavy machinery is excessively applied or the direction of the force is slightly changed, leading to collapse of the steel structure building. In addition, there is a problem that two heavy machines for cutting and a heavy machine for gripping are required as heavy machines.

  On the other hand, when dismantling a steel structure building that is at risk of collapse due to an earthquake disaster or the like, a method of cutting using a device composed of a push-off wire saw mechanism (see, for example, Patent Document 1) and a crusher attachment is known. . In this method, a steel beam, which is an object to be cut, is held by a crusher attachment attached to an arm tip of a heavy machine, and is cut by pressing a wire saw. In this method, since the external force applied to the steel frame is relatively small, the risk of collapse of the steel structure building can be reduced. However, if the wire completely cuts through the steel frame, the wire cannot be pulled back. Therefore, it is necessary to stop the cutting operation just before the penetration, pull out the wire saw, and then thread the remaining part with a crusher attachment. There was a lot of work. In addition, there is a problem that an external force is slightly applied to the steel frame side when threading.

JP 2013-2034 A

  For this reason, there has been a demand for the development of an apparatus that has improved work efficiency so that it is not necessary to pull back the wire saw after the cutting penetration, and it is not necessary to thread the remaining part with a crusher attachment.

  The present invention has been made in view of the above, and an object of the present invention is to provide a cutting and gripping device and a cutting and gripping method capable of improving work efficiency.

  In order to solve the above-described problems and achieve the object, a cutting and gripping device according to the present invention includes gripping means for gripping a substantially rod-shaped cutting object, and cutting means for cutting the cutting object, A cutting and gripping device for cutting in a state in which a cutting target is gripped, wherein the gripping means grips the cutting target from a direction substantially perpendicular to the extending direction of the cutting target, and the cutting means Are arranged on both sides of the gripping means spaced apart from the gripping means in the extending direction by the cutting means on both sides of the gripping means in a state where the cutting object is gripped by the gripping means. The both sides of the cutting object are cut simultaneously.

  Further, another cutting and gripping device according to the present invention may further include a connecting means that connects the gripping means and the cutting means and can be expanded and contracted in the extending direction. The distance between the gripping means and the cutting means can be adjusted by expansion and contraction.

  Another cutting and gripping device according to the present invention is characterized in that, in the above-described invention, the cutting means comprises a press-cut wire saw mechanism that presses and cuts a wire saw against the cutting object.

  Another cutting and gripping device according to the present invention is characterized in that in the above-described invention, the cutting and gripping device further includes a displacement preventing means for preventing a positional displacement of the wire saw with respect to a surface of the cutting object.

  The cutting and gripping method according to the present invention is a cutting and gripping method of cutting the cutting object using the above-described cutting and gripping device, the gripping step of gripping the cutting object by the gripping means, and the cutting And a cutting step of cutting both sides of the object with the cutting means.

  Further, in another cutting and gripping method according to the present invention, in the above-described invention, in the cutting step, the cutting means cuts the cutting object in an oblique direction gradually approaching the gripping means according to the progress of cutting. Features.

  According to the cutting and gripping apparatus according to the present invention, the cutting and gripping device includes a gripping unit that grips a substantially rod-shaped cutting target and a cutting unit that cuts the cutting target, and performs cutting while holding the cutting target. The apparatus is an apparatus, wherein the gripping means grips the cutting object from a direction substantially orthogonal to the extending direction of the cutting object, and the cutting means is predetermined in the extending direction from the gripping means. Since both the sides of the cutting object are simultaneously cut by the cutting means on both sides of the gripping means in a state where the cutting object is gripped by the gripping means, both sides of the gripping means are spaced apart from each other. The object to be cut can be grasped, cut and removed with a single heavy machine, and the work time required for cutting is shortened. For this reason, it becomes easier to cut out cutting objects such as steel beams and steel columns in the building demolition work as compared with the conventional method, and the work efficiency can be improved. Further, since there is no uncut portion as in the prior art, it is not necessary to perform screwing with a crusher or the like, and no external force is applied to the housing side during dismantling, and the risk of collapse can be reduced.

  Further, according to another cutting and gripping apparatus according to the present invention, the cutting and gripping device further includes connecting means that connects the gripping means and the cutting means and is extendable and contractible in the extending direction. Since the interval between the gripping means and the cutting means can be adjusted, there is an effect that the cutting length of the object to be cut can be easily changed as necessary. Further, the cutting position can be finely adjusted even after the cutting object is gripped.

  Further, according to another cutting and gripping apparatus according to the present invention, the cutting means is composed of a push-cut wire saw mechanism that presses and cuts a wire saw against the object to be cut. There is no need to pull back the wire saw, and there is an effect that it is possible to prevent the wire saw from being caught by the cutting object or the like even when the cutting object after cutting is removed.

  Further, according to another cutting and gripping device according to the present invention, since the wire saw is further provided with a detent means for preventing displacement of the wire saw with respect to the surface of the cutting object, the angle with respect to the surface of the cutting object is set. When the cutting is performed obliquely, the wire saw can be prevented from being displaced from the surface of the object to be cut and the wire saw from becoming difficult to bite into the cutting position.

  Further, according to the cutting and gripping method according to the present invention, a cutting and gripping method for cutting the cutting object using the above-described cutting and gripping device, the gripping step for gripping the cutting object with the gripping means, A cutting step of cutting both sides of the object to be cut by the cutting means, thereby producing an effect of improving the work efficiency of the cutting work in the building demolition.

  According to another cutting and gripping method according to the present invention, in the cutting step, the cutting means cuts the cutting object in an oblique direction gradually approaching the gripping means according to the progress of cutting. There is an effect that the cutting object can be easily cut out and removed. In addition, when the cutting direction is an oblique direction that approaches the gripping means as it goes downward, the weight of the cut object to be cut is supported by the cut object through the cutting surface, so the cut object after cutting Can be prevented in advance.

FIG. 1 is a schematic side view showing an embodiment of a cutting and gripping device and a cutting and gripping method according to the present invention. FIG. 2 is a front view of the cutting means provided in the cutting and gripping apparatus according to the present invention. FIG. 3 is a side view of the cutting means provided in the cutting and gripping apparatus according to the present invention. FIG. 4 is a diagram for explaining the phenomenon of positional deviation of the wire saw on the surface of the object to be cut. FIG. 5 is a diagram for explaining the operation of the deviation preventing means in the cutting and gripping apparatus according to the present invention.

  Hereinafter, embodiments of a cutting and gripping apparatus and a cutting and gripping method according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

[Cutting device]
First, the cutting and gripping device according to the present invention will be described.
As shown in FIG. 1, a cutting and gripping device 10 according to the present invention includes a gripping means 12 for gripping a substantially rod-shaped steel beam 1 (an object to be cut), and a cutting means 14 for cutting the steel beam 1. The beam 1 is cut while being held.

  The gripping means 12 has a scissors shape for gripping the steel beam 1 from a direction Y substantially perpendicular to the extending direction X of the steel beam 1 and is attached to the tip of an arm 16 of a heavy machine (not shown). The gripping operation of the gripping means 12 can be remotely operated from a cockpit of a heavy machine. The gripping means 12 can be configured using, for example, a conventional crusher attachment.

  The cutting means 14 comprises a push-cut wire saw mechanism that presses and cuts the wire saw 22 against the steel beam 1 and is provided on both sides of the gripping means 12 spaced from the gripping means 12 in the extending direction X by a predetermined interval (for example, 1 m). Two are arranged. One feature of the present invention is that while the steel beam 1 is gripped by the gripping means 12, both sides of the steel beam 1 are simultaneously cut by the cutting means 14 on both sides of the gripping means 12. Even if both sides are cut at the same time, the steel beam 1 after being cut is not dropped because it is held by the holding means 12. By simultaneously cutting two places in the extending direction of the steel beam 1 that is the object to be cut by the two cutting means 14, there is no need to pull back the wire saw 22 after the cutting penetration. Note that the cutting operation of the cutting means 14 can be performed remotely from a cockpit of a heavy machine.

  The gripping means 12 and the cutting means 14 are connected by a connecting means 18 that can expand and contract in the extending direction X. The distance between the gripping means 12 and the cutting means 14 can be adjusted by remote control or the like by the expansion and contraction of the connecting means 18, and the wire saw 22 can be moved in a direction substantially orthogonal to the cutting surface. The connecting means 18 and the cutting means 14 are connected via an intermediate member 20 having an L-shaped cross section. The connecting means 18 can easily change the cut-out length of the steel beam 1 as necessary. Further, the cutting position can be finely adjusted even after the steel beam 1 is gripped by the gripping means 12. Moreover, the wire saw 22 can be prevented from being caught when the steel beam 1 is removed after cutting.

Next, the configuration and operation of the cutting means 14 will be described.
2 and 3 are a front view and a side view of the cutting means 14, respectively. As shown in these drawings, the cutting means 14 includes a portal frame 24 and two left and right pole bases 26 extending in the vertical direction. A cylindrical slider 28 is fixed to the outer side of the pole base 26 so as to be relatively movable in the vertical direction. The left and right sliders 28 are connected by a connecting member 29.

  By moving the slider 28 in the vertical direction along the pole base 26 by a driving means (not shown), it is possible to relatively move the portal frame 24 in the vertical direction. For example, the wire saw 22 can be pressed against the steel beam 1 by moving the portal frame 24 so as to approach the steel beam 1. Conversely, the wire saw 22 can be pulled back from the steel beam 1 by moving the portal frame 24 in a direction away from the steel beam 1.

  The gate-type gantry 24 includes two left and right vertical members 30 that extend in the vertical direction, an upper member 32 that connects the vertical members 30 in the horizontal direction on the upper side, and a lower member 34 that connects the lower side. A pair of main pulleys 36 is provided above the upper member 32, and a pair of sub pulleys 38 are provided at the left and right symmetrical positions on the lower member 34. Below the vertical member 30, a pair of sub-pulleys 40, 42 are provided at symmetrical positions.

  The wire saw 22 is spanned between a pair of left and right main pulleys 36 and sub-pulleys 38, 40, and 42, and is rotated by a rotational drive of a main motor 44 provided behind the main pulley 36. . The steel beam 1 can be cut by pressing the rotating wire saw 22 against the steel beam 1.

  Here, as shown in FIG. 2, the cutting means 14 is provided with a slip prevention means 46 for preventing the positional deviation of the wire saw 22 with respect to the surface of the steel beam 1. 1 and 3, the illustration of the slip prevention means 46 is omitted.

  This slip prevention means 46 is connected to two to three vertical cylindrical members 50 loaded with elastic springs 48 inside, and from the lower ends of the respective cylindrical members 50 to the lower ends of the elastic springs 48 inside thereof. A telescopic member 52 that protrudes and retracts from the inside of the member 50 and can expand and contract its longitudinal length; and one slip-preventing member 54 having a substantially L-shaped cross section attached to the lower end of the telescopic member 52 in the lateral direction; Consists of. The upper end of the cylindrical member 50 is fixed to the upper member 32, and the elastic spring 48 biases the elastic member 52 to the side that pushes it downward.

The operation and action of the deviation preventing means 46 will be described.
When the wire saw 22 is pressed in the direction Z in order to cut the steel beam 1 in the oblique direction Z in the configuration without the slip prevention means 46 as shown in FIG. As described above, the wire saw 22 does not bite into the surface of the steel beam 1 and may move along the surface. In this case, the steel beam 1 cannot be cut from a desired cutting position.

  Therefore, as shown in FIG. 5, the wire saw 22 is prevented from being displaced by the guide action of the displacement preventing member 54 disposed at the lower end of the elastic member 52. Since the slip prevention member 54 is pressed and urged downward by an elastic spring 48 (not shown) via the elastic member 52, when the wire saw 22 is pressed against the steel beam 1, the slip prevention member 54 is attached to the steel beam 1. Pressed against the surface. When the cutting operation is performed in this state, the movement of the wire saw 22 toward the slip prevention member 54 is suppressed, and the wire saw 22 does not move. Therefore, it becomes easy to bite the wire saw 22 in a desired direction (for example, the oblique direction Z) with respect to the steel beam 1.

  For this reason, when making an angle with respect to the surface of the steel beam 1 and cutting obliquely, the wire saw 22 is displaced from the surface of the steel beam 1 and the wire saw 22 is less likely to bite into the cutting position. It can be prevented in advance.

  Further, according to the cutting and gripping device 10 of the present invention configured as described above, both sides of the steel beam 1 are simultaneously cut by the cutting means 14 on both sides of the gripping means 12 while the steel beam 1 is gripped by the gripping means 12. Therefore, the steel beam 1 can be grasped, cut and removed with a single heavy machine, and the work time required for cutting is shortened. For this reason, the cutting of the steel beam 1 in the building demolition work becomes easier than in the conventional method, and the work efficiency can be increased. Further, since there is no uncut portion as in the prior art, it is not necessary to perform screwing with a crusher or the like, and no external force is applied to the housing side during dismantling, and the risk of collapse can be reduced. Moreover, it is possible to work without an operator approaching. Furthermore, problems such as catching of the wire saw 22 after cutting and penetration can be eliminated.

[Cutting and gripping method]
Next, the cutting and gripping method according to the present invention will be described.
As shown in FIG. 1, the cutting and gripping method according to the present invention is a cutting and gripping method of cutting a steel beam 1 using the above-described cutting and gripping device 10, and a gripping step of gripping the steel beam 1 by a gripping means 12. S1 and cutting process S2 which cuts both sides of steel beam 1 with cutting means 14 are provided. Thereby, the work efficiency of the cutting work in a building demolition can be improved.

  Here, in said cutting process S2, the cutting means 14 can cut | disconnect the steel beam 1 in the diagonal direction Z which approaches the holding means 12 gradually according to the progress of cutting. If it does in this way, the shape of the cut surface of the both sides of the steel beam 1 will become a reverse letter C shape by side view. Since it becomes easy to pull upward by the holding means 12, it is possible to easily cut out and remove the steel beam 1 after cutting.

  In this case, even if the cut-out steel beam 1 is detached from the gripping means 12 and dropped, the weight of the cut-out steel beam 1 is supported by the steel beam 1 remaining on the housing side through the cut surface. The fall of the cut steel beam 1 can be prevented in advance.

  Moreover, although FIG. 1 is the figure seen from the side, you may read this as a figure seen from upper direction. In this case, since the cut steel beam 1 can be easily pulled out to the side (upper side in FIG. 1) by the gripping means 12, it is possible to easily cut out and remove the steel beam 1 after cutting.

  In the above embodiment, the steel beam has been described as an example of the cutting object. However, the present invention is not limited to this, and the cutting object may be a steel column or an oblique material such as a brace. . The material of the object to be cut is not limited to steel, but may be concrete, reinforced concrete, steel reinforced concrete, woody material, or the like.

  As described above, the cutting and gripping device according to the present invention includes a gripping means for gripping a substantially rod-shaped cutting object and a cutting means for cutting the cutting object, and grips the cutting object. A cutting and gripping device for cutting in a state, wherein the gripping means grips the cutting object from a direction substantially orthogonal to the extending direction of the cutting object, and the cutting means is separated from the gripping means. It is arranged on both sides of the gripping means with a predetermined interval in the extending direction, and the cutting object on both sides of the gripping means is held on both sides of the cutting object in a state where the cutting object is gripped by the gripping means. Are simultaneously cut, it is possible to grip, cut and remove the object to be cut with a single heavy machine, and the work time required for cutting is shortened. For this reason, it becomes easier to cut out a cutting object such as a steel beam or a steel column in the building demolition work as compared with the conventional method, and the work efficiency can be improved. Further, since there is no uncut portion as in the prior art, it is not necessary to perform screwing with a crusher or the like, and no external force is applied to the housing side during dismantling, and the risk of collapse can be reduced.

  Further, according to another cutting and gripping apparatus according to the present invention, the cutting and gripping device further includes connecting means that connects the gripping means and the cutting means and is extendable and contractible in the extending direction. Since the interval between the gripping means and the cutting means can be adjusted, the cutting length of the cutting object can be easily changed as necessary. Further, the cutting position can be finely adjusted even after the cutting object is gripped.

  Further, according to another cutting and gripping apparatus according to the present invention, the cutting means is composed of a push-cut wire saw mechanism that presses and cuts a wire saw against the object to be cut. There is no need to pull back the wire saw, and it is possible to prevent the wire saw from being caught on the cutting object or the like even when the cutting object after cutting is removed.

  Further, according to another cutting and gripping device according to the present invention, since the wire saw is further provided with a detent means for preventing displacement of the wire saw with respect to the surface of the cutting object, the angle with respect to the surface of the cutting object is set. It is possible to prevent the wire saw from being displaced from the surface of the object to be cut and becoming difficult to bite into the cut position when it is cut obliquely by holding it.

  Further, according to the cutting and gripping method according to the present invention, a cutting and gripping method for cutting the cutting object using the above-described cutting and gripping device, the gripping step for gripping the cutting object with the gripping means, A cutting step of cutting both sides of the object to be cut by the cutting means, so that the work efficiency of the cutting work in building demolition can be improved.

  Further, according to another cutting and gripping method according to the present invention, in the cutting step, the cutting means cuts the cutting object in an oblique direction gradually approaching the gripping means in accordance with the progress of cutting. The cutting object can be easily cut out and removed. In addition, when the cutting direction is an oblique direction that approaches the gripping means as it goes downward, the weight of the cut object to be cut is supported by the cut object through the cutting surface, so the cut object after cutting Can be prevented in advance.

  As described above, the cutting and gripping device and the cutting and gripping method according to the present invention are useful for cutting out members such as steel frames in, for example, building demolition work, and are particularly suitable for increasing the work efficiency of cutting work.

1 Steel beam (object to be cut)
DESCRIPTION OF SYMBOLS 10 Cutting | grip holding device 12 Gripping means 14 Cutting means 16 Arm 18 Connecting means 20 Intermediate member 22 Wire saw 24 Portal frame 26 Pole base 28 Slider 29 Connecting member 30 Vertical member 32 Upper member 34 Lower member 36 Main pulleys 38, 40, 42 Sub-pulley 44 Main motor 46 Displacement prevention means 48 Elastic spring 50 Cylindrical member 52 Stretchable member 54 Displacement prevention member

Claims (6)

A cutting and gripping device that includes a gripping means for gripping a substantially rod-shaped cutting object and a cutting means for cutting the cutting object, and that cuts the cutting object while gripping the cutting object.
The gripping means grips the cutting object from a direction substantially orthogonal to the extending direction of the cutting object,
The cutting means is disposed on both sides of the gripping means at a predetermined interval in the extending direction from the gripping means,
A cutting and gripping apparatus that simultaneously cuts both sides of the cutting object with the cutting means on both sides of the gripping means in a state where the cutting object is gripped by the gripping means.   The apparatus further comprises a connecting means that connects the gripping means and the cutting means and can be expanded and contracted in the extending direction, and the interval between the gripping means and the cutting means can be adjusted by extending and contracting the connecting means. The cutting and gripping device according to claim 1.   The cutting and gripping device according to claim 1 or 2, wherein the cutting means includes a push-cut wire saw mechanism that presses and cuts a wire saw against the object to be cut.   The cutting and gripping device according to any one of claims 1 to 3, further comprising a displacement preventing means for preventing a displacement of the wire saw with respect to a surface of the cutting object. A cutting and gripping method of cutting the cutting object using the cutting and gripping device according to any one of claims 1 to 4,
A gripping step of gripping the cutting object with the gripping means;
And a cutting step of cutting both sides of the object to be cut by the cutting means.   6. The cutting and gripping method according to claim 5, wherein, in the cutting step, the cutting means cuts the cutting object in an oblique direction that gradually approaches the gripping means in accordance with the progress of cutting.

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