JP2002035630A - Concrete crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete crusher which is capable of efficiently crushing a wide variety of concrete and has enhanced reliability and durability and enables stabilization of the crushing operation and reduction in operating cost. SOLUTION: This concrete crusher for spraying high-pressure water on a concrete structure to crush concrete, is provided with a crusher main body 1, a water conveyance pipe 2 which is supported by the crusher main body 1 and is used for conveying high-pressure water and spraying the high-pressure water from the front end, a support 3 which is placed on one side of the crusher main body 1 and by which the water conveyance pipe 2 is supported so that the front end of the conveyance pipe 2 can be subjected to rotational movement having a prescribed angle of the whirling motion and any movement of the front end in the direction along the shaft line O2 is inhibited, and a rotary section 4 which is rotatably placed on the other side of the crusher main body 1 and has a rotating hole 46 for supporting the front end of the conveyance pipe 2 at offset positions from the rotation axis O1 in a relatively rotatable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for crushing concrete in a concrete structure, and more particularly to a concrete crushing apparatus for crushing only concrete without damaging reinforcing steel.

[0002]

2. Description of the Related Art In recent years, it has become particularly important to improve the seismic resistance of existing reinforced concrete (RC) structures so that they can withstand large-scale earthquakes. Proposed and implemented. Of particular need for such reinforcement are structures in which concrete has aged over time. For such a structure, effective reinforcement measures are to crush (drop) and remove only the deteriorated concrete and place new concrete while leaving the reinforcing bars in place.

As a method of crushing concrete, a method of crushing concrete by spraying high-pressure water onto a concrete surface as a so-called water jet has been recently developed. This crushing method has good working efficiency,
Since it has the advantages of not damaging existing reinforcing bars and suppressing the occurrence of microcracks, it is expected to be a crushing method that replaces conventional core boring. The crushing equipment used for these crushing methods is
Although it can be divided into several types according to its purpose, crushing equipment used for continuous crushing over a wide range as in the above reinforcing measures requires a large amount of concrete that can be crushed per unit time. Efficient crushing work is required. For this reason, a so-called rotary crusher, in which a plurality of nozzles rotate while spraying a water jet, is often used.

FIG. 5 shows an example of a rotary crusher. The crushing apparatus includes a water pipe 101, nozzle holes 103a,
A nozzle 103 having a nozzle 03b is connected via a swivel joint (universal joint) 102 so as to be relatively rotatable. A high-pressure water pump (not shown) is provided on the base end side of the water pipe 101. Further, the nozzle 103 is driven to rotate around the axis O by a driving source (not shown). That is, only the nozzle 103 can be swirled by the swivel joint 102 without rotating the water pipe 101. The high-pressure water sent from the high-pressure water pump is supplied to the water pipe 101, the swivel joint 10.
2 and the nozzle holes 103a, 103b via the nozzle 103
Is sprayed as a water jet toward concrete structures to break concrete. Such a water jet is illustrated as 104. At this time, the entire crushing device is moved from the left side to the right side in the figure while rotating the nozzle 103. By doing so, concrete within a width substantially equal to the distance between the nozzle holes 102a and 102b can be sequentially crushed into a band shape, and the crushing operation can be performed efficiently.

[0005]

By the way, in such a crushing apparatus, since a concrete is crushed by spraying a water jet, a very high water pressure is applied to the water supply pipe 101 and the swivel joint 102. In addition, since very high pressure water is sprayed, a very high reaction force is applied to the entire crushing device, especially the nozzle 1
Join 03. Therefore, a trouble often occurs in the swivel joint 102 which is a structurally weak part. That is, since the device is used under a high water pressure, wear or fatigue is severe. As a result, a failure is induced, and the service life is very short. In addition, the size of the reaction force is not always uniform due to crushing by a plurality of water jets.
By acting as a force to bend 02, the induction of a failure is further spurred. If a trouble frequently occurs in the swivel joint 102, the crushing operation is interrupted for a long time for repair or replacement, which causes a delay in the operation. In addition, since the swivel joint 102 is generally expensive, frequent replacement or the like results in an increase in the overall operation cost. Furthermore, in order to generate a plurality of water jets and to give water pressure that can crush concrete to any of the water jets,
The pressure of the high-pressure water from the high-pressure water pump must be set very high. For this reason, the pump cannot be used unless it is an expensive, high-output, high-performance high-pressure water pump, and the cost of peripheral equipment for the crusher has been increased.

The present invention has been made in view of the above circumstances, and is a concrete capable of efficiently crushing a wide range of concrete, improving reliability and durability, stabilizing work and reducing work cost. It is an object to provide a crushing device.

[0007]

The invention according to claim 1 is a concrete crushing apparatus for crushing concrete by spraying high-pressure water onto a concrete structure. The concrete crushing apparatus is supported by the apparatus main body and has a high pressure. A water pipe section for supplying water and blowing from the tip side, and provided on one side of the device main body, allowing rotation of the tip side of the water pipe section with a predetermined swing angle and in the axial direction thereof. A supporting portion for supporting movement of the water supply pipe, and a rotation hole rotatably provided on the other side of the apparatus main body and supporting the tip end side of the water pipe section at a position offset from a rotation axis so as to be relatively rotatable. And a rotating part having the same.

[0008] As described above, since the water pipe is rotated by rotating the rotating portion provided outside the water pipe, the water pipe can be made structurally strong. That is, since the swivel can be performed without a rotating part such as a swivel joint in the middle of the water pipe, a wide range of concrete can be crushed while having a structure that can withstand high water pressure and reaction force. In addition, since the water jet generated from the water pipe section also turns when the water pipe section turns, a wide crushing area can be secured even with a single nozzle hole, as compared with a case where a plurality of nozzle holes are provided. Thus, the pressure of the high-pressure water can be reduced.

According to a second aspect of the present invention, there is provided the concrete crushing apparatus according to the first aspect, wherein the apparatus main body is provided with a driving section for driving the rotating section to rotate.

[0010] With this configuration, the water supply pipe section that receives a high reaction force generated by spraying high-pressure water can be easily turned.

According to a third aspect of the present invention, in the concrete crushing apparatus according to the second aspect, the driving section includes a driving source and a first gear connected to the driving source and driven to rotate. Wherein the rotating unit includes a second gear to which a rotational driving force from the first gear is transmitted. According to a fourth aspect of the present invention, in the concrete crushing apparatus according to the third aspect, the first gear and the second gear are directly meshed with each other.

As described above, since the rotational driving force is transmitted by the meshing of the gears, a high reaction force can be generated without causing slip or idling, for example, when a fan belt or a chain is used. The rotational driving force can be more reliably transmitted to the receiving rotating part. Further, if the first gear connected to the driving source and the second gear provided in the rotating portion are directly meshed, the structure can be simplified and the rotational driving force can be transmitted with higher efficiency. can do.

According to a fifth aspect of the present invention, in the concrete crushing apparatus according to any one of the first to fourth aspects, the water pipe section is provided between the support section and the rotary hole. A cylindrical body, and a nozzle shaft that is relatively movably inserted into the cylindrical body such that a distal end side protrudes from the distal end side of the cylindrical body, wherein the cylindrical body and the nozzle shaft are fixed members. Characterized by being integrally fixed by

As described above, of the water pipe section, the member supported by the apparatus main body and the member for sending and blowing out high-pressure water are provided as separate members, so that the structure can be adapted to the use of each member. Further, since such a cylinder and the nozzle shaft are fixed by the fixing member, if the fixing by the fixing member is released, the relative position of the cylinder and the nozzle shaft in the axial direction can be changed. That is, if the length of the protrusion of the nozzle shaft from the cylinder is changed, the distance between the nozzle and the concrete surface can be changed without moving the apparatus main body, and the amount of concrete crushing can be arbitrarily controlled.

According to a sixth aspect of the present invention, in the concrete crushing apparatus according to the fifth aspect, a substantially spherical sliding surface is provided at a position corresponding to the support portion and the rotation hole of the cylindrical body. Ball joints are formed, and these ball joints are joined to ball joint receivers respectively formed in the support portion and the rotation hole so as to be angularly displaceable.

With such a structure, the water pipe can be smoothly and easily swiveled, and the water pipe can be rotated in the axial direction, that is, in the direction in which high reaction force is applied by spraying high-pressure water. Movement can be more reliably prevented.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a concrete crushing apparatus according to the present invention will be described below with reference to FIGS. This concrete crushing device has an
, A water pipe section 2 and a support section 3 provided on the apparatus main body 1
A rotating unit 4 rotatably supported by the apparatus main body 1; and a driving unit 5 provided on the apparatus main body 1 and configured to rotationally drive the rotating unit 4.
And

The apparatus main body 1 is for pivotally supporting the water pipe 2 and is provided on the base 11 and one side of the base 11, that is, on the side opposite to the side on which the water jet is sprayed. The support portion 3 for supporting the base end side of the cylindrical body 21 of the portion 2 and the other side of the base 11, that is, the side on which the water jet is sprayed,
And a rotating body supporting portion 12 provided with a driving portion 5. The support portion 3 is provided upright on the base 11, and a support hole 3 through which the water supply pipe portion 2 is inserted to support the water supply pipe portion 2 at a position separated from the base 11.
1 is formed. Inside the support hole 31, a ball joint receiver 32 is provided for joining a ball joint 21a provided on the cylindrical body 21 constituting the water supply pipe section 2.

The water pipe section 2 has a cylindrical body 21 and a nozzle shaft (lance) 22. The cylindrical body 21 is a long cylindrical body whose both ends are open, and is provided between the support hole 31 provided in the support part 3 and the rotary hole 46 provided in the rotary part 4. , Inside the nozzle shaft 22
Are inserted so as to be insertable and removable, that is, relatively movable.
A ball joint 21a having a substantially spherical slide surface is provided on the base end side of the cylindrical body 21, and a ball joint 21b also having a substantially spherical slide surface is provided on the distal end side. The ball joint 21 a
Are jointed and supported so as to be angularly displaceable to a ball joint receiver 32 provided at the same position. For this reason, the tip end side of the cylinder 21 is allowed to rotate with a predetermined deflection angle, and
The movement in the direction of the axis O2 is prohibited. Further, the ball joint 21b is joined to and supported by a ball joint receiver 47 provided in the rotating hole 46 of the rotating unit 4 so as to be angularly displaceable. For this reason, the cylindrical body 21 can be angularly displaced and relatively rotatable with respect to the rotating unit 4, and the axis O
Movement in two directions is prohibited. Further, the cylinder 21 has a plurality of female screw holes 21c into which bolts (fixing members) 23 are screwed from a direction substantially orthogonal to the axis O2. The inserted nozzle shaft 22 is pressed by tightening the bolt 23, and the cylindrical body 22 and the nozzle shaft 23 are integrally fixed.

The nozzle shaft 22 is a long cylindrical member having an outer diameter just enough to be disposed in close proximity to the inside of the cylinder 21, and high-pressure water is supplied to the inside thereof. It is fixed integrally with the cylinder 21. A high-pressure water pump (not shown) is connected to the base end side of the nozzle shaft 22 to supply high-pressure water.
In addition, a nozzle hole (not shown) is provided at the tip end side, so that high-pressure water supplied from a high-pressure water pump is blown toward the concrete structure.

The rotating section 4 includes a first rotating member 41, a turning gear (second gear) 42, a second rotating member 43, and a first rotating member 43.
The first ring 44 screwed with the rotating member 41 and the second ring 45 screwed with the second rotating member 43 are integrally connected and fixed, and are rotatable about the rotation axis O1. It is supported by the rotating body support 12. A bearing 13 is provided between the rotating body fixing part 11 and the rotating part 4,
The rotating part 4 can rotate smoothly. The first rotating member 41 and the second rotating member 43 are both rotating bodies having a cylindrical shape. The first rotating member 41 is on the other side of the apparatus main body 1, and the second rotating member 43 is on one side of the apparatus main body 1. And are connected so as to sandwich the turning gear 42 therebetween. The first rotating member 41, the turning gear 42, and the second rotating member 43 are integrally connected and fixed by a connecting bolt 48. At the end of the first rotating member 41, a screw for screwing the first ring 44 is provided.
A screw for screwing the second ring 45 is formed at an end of the second rotating member 42. The turning gear 42 is configured to receive a rotational driving force from the driving unit 5 in the rotating body support unit 12.

The first rotary member 41 is formed with a rotary hole 46 through which the cylindrical body 21 is inserted and supported at a position offset from the rotary axis O1, that is, at a position separated from the rotary axis O1 by a predetermined distance. I have. A ball joint 21 b provided on the cylinder 21 is provided inside the rotation hole 46.
A ball joint receiver 47 is provided to join the joints. Therefore, the axis O2 of the water pipe section 2 and the rotation axis O1 of the rotating section 4 are not parallel to each other, and the water pipe section 2 is pivotable with the support section 3 as a fulcrum. An opening 43a is formed in the second rotating member 43 so as not to hinder the turning of the water pipe section 2.

The first ring 44 and the second ring 45 are respectively screwed with the first rotating member 41 and the second rotating member 45, respectively. These first ring and second ring 45
Are for increasing the outer diameter of both ends of the rotating portion 4 and are arranged so as to sandwich the rotating body support portion 12 from both sides. That is, the first ring 44 and the second ring 45 prohibit the movement of the rotating unit 4 to the rotation axis O <b> 1 with respect to the main body 1.

The drive section 5 is provided on the rotating body support section 12, and is driven to rotate about a rotation axis O3 integrally with a hydraulic motor (drive source) 51 and a rotation shaft 51a of the hydraulic motor 51. A drive gear (first gear) 52. The hydraulic motor 51 is connected to a hydraulic unit (not shown), and the supply hydraulic pressure is controlled by the hydraulic unit so that the rotation speed or torque of the driving gear 52 can be controlled. The driving gear 52 meshes with the turning gear 42 provided in the rotating unit 4 in the rotating body support unit 12, and transmits the rotational driving force from the driving unit 5 to the rotating unit 4. A predetermined amount of lubricating oil (not shown) is contained in the rotating body support portion 12 to lubricate each sliding portion or meshing portion.

Next, the operation of the concrete crushing apparatus will be described. First, the base 11 is firmly fixed to a gantry (not shown) so that the base 11 does not move due to the reaction force due to the spray of the water jet. This gantry is movable in the vertical direction or the horizontal direction, and is capable of continuously crushing concrete. In this state, water is supplied from the high-pressure water pump to the nozzle shaft 22, and the driving unit 5 is driven to rotate the rotating unit 5.
In this case, the water supply pipe section 2 rotates around the axis O1 so that its trajectory describes a conical surface with the support section 3 as a fulcrum, and the water jet generated from the nozzle hole of the nozzle shaft 22 also rotates. By being sprayed with the water jet, the concrete is crushed sequentially in a circle. Then, if the gantry is moved, the concrete is crushed sequentially along this moving direction. That is, the concrete within the width substantially equal to the turning diameter of the water jet tip portion is crushed into a belt shape. The rotation speed of the rotation unit 4 is 50 to 300.
rpm, more preferably about 100 rpm. The width of concrete that is crushed in a band shape is referred to as “crushing width”.
It is preferably set to about cm.

To change the amount of concrete crushing, that is, the crushing depth or crushing area, the bolt 23
Is released to release the fixation between the cylinder 21 and the nozzle shaft, and the nozzle shaft 22 is moved in the direction of the axis O2, thereby changing the length of the tip of the nozzle shaft from the cylinder 21. By doing so, the distance between the nozzle hole and the concrete surface, that is, the length of the water jet can be adjusted, and the crushing depth and the crushing area can be changed without changing the water pressure of the high-pressure water.

In the concrete crushing apparatus according to the present embodiment, the water pipe 2 is rotated by rotating the rotary unit 4 provided outside the water pipe 2, so that the water pipe 2 is It can be turned without a rotating part in the middle. Therefore, a wide range of concrete can be crushed while the water pipe section 2 has a structure that can withstand high water pressure and reaction force. As described above, since a rotating member such as a swivel joint, which has been conventionally required, can be eliminated, trouble occurrence can be suppressed, the durability and reliability of the concrete crushing device can be increased, and a rise in working costs can be suppressed. . Further, since the water jet also turns by turning the water supply pipe part 2, a wide crushing area can be secured even with one nozzle hole, and compared with a case where a plurality of nozzle holes are provided as in the conventional case. Thus, the pressure of the high-pressure water can be reduced. Therefore, it is not always necessary to use a high-output, high-performance high-pressure water pump, and the output and performance required for the high-pressure water pump can be reduced, thereby contributing to cost reduction.

Further, a driving unit 5 for driving the rotating unit 4 to rotate.
So that the water pipe section 2 that receives the high reaction force generated by spraying the water jet,
It can be easily turned, and the working efficiency can be improved.

Further, a rotational driving force is transmitted by a driving gear 52 connected to the hydraulic motor 51 and driven to rotate, and a turning gear 42 of the rotating unit 4, and the driving gear 52 and the turning gear 42 are directly connected to each other. They are engaged. As described above, since the rotational driving force is transmitted by the meshing of the gears, the rotating portion 4 which receives a high reaction force without causing slippage or idling as in the case of using a fan belt or the like, for example.
In contrast, the rotational driving force can be transmitted more reliably, and the rotational driving force can be transmitted with higher efficiency with a simple configuration. Therefore, reliability and durability can be further improved, and work can be stabilized.

Further, since the cylindrical body 21 and the nozzle shaft 22 are integrally fixed by the bolts 23 to constitute the water supply pipe section 2, the members supported by the apparatus main body 1 and the high pressure water are supplied and blown out. The members can be separated from each other, and can be configured according to the use of each member, and maintenance such as repair and replacement can be facilitated. Then, by releasing the fixing by the bolt 23 and changing the length of the protrusion of the tip end side of the nozzle shaft 22 from the cylindrical body 21, the length of the water jet can be changed and the amount of concrete crushing can be arbitrarily controlled. Therefore, the moving amount of the heavy object such as the gantry or the apparatus main body 1 can be reduced, and the working efficiency can be further improved.

Further, by connecting the ball joints 21a, 21b formed on the cylindrical body 21 and the ball joint receivers 32, 47 so as to be angularly displaceable, the water pipe section 2 is connected to the support section 3 and the rotating section 4. I am trying to be supported. Therefore, the water pipe 2 can be smoothly and easily swirled, and movement in the direction of the axis O2, which receives a high reaction force due to the spray of the water jet, can be more reliably prevented. The durability can be further improved.

In the above embodiment, a hydraulic motor is used as a drive source. However, the present invention is not limited to this, and another drive source such as an electric motor with improved water resistance may be used. Although the driving gear and the turning gear are directly meshed with each other, one or more gears may be interposed between them.

[0033]

As described above, the concrete crushing apparatus according to the present invention is configured such that the water pipe is turned by rotating the rotating part provided outside the water pipe. In addition, it is possible to efficiently crush a wide range of concrete, improve reliability and durability, stabilize work, and reduce work cost.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a concrete crushing apparatus according to the present invention, and is a partially cutaway front view.

FIG. 2 is a plan view partially cut away.

FIG. 3 is a side view of the same.

FIG. 4 is a sectional view taken along the line AA in FIG. 1;

FIG. 5 is a schematic configuration diagram illustrating an example of a conventional rotary crusher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Water supply pipe part 3 Support part 4 Rotating part 5 Drive part 21 Cylindrical body 21a, 21b Ball joint 22 Nozzle shaft 23 Bolt (fixing member) 32 Ball joint receiver 41 Rotating gear (2nd gear) 46 Rotation hole 47 Ball joint receiver 51 Hydraulic motor (drive source) 52 Drive gear (first gear) O1, O3 Rotation axis O2 axis

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B28D 1/00 B28D 1/00 E04G 23/08 E04G 23/08 E (72) Inventor Yoshiyuki Senoo Koto, Tokyo 1-28-6 Kameido-ku NS Engineering Co., Ltd. (72) Inventor Yosuke Noda 1356 Takada-cho, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Wire-Nupy Corporation (72) Inventor Keiichiro Ishimaru 4-1 Toyo, Koto-ku, Tokyo -13 Hirose Co., Ltd. (72) Inventor Yasumasa Amari 4-1-13 Toyo, Koto-ku, Tokyo 4-1-13 Hirose Co., Ltd.F-term (reference) 2E176 AA01 DD28 3C060 CE07 CE23 3C069 AA05 BA07 BB01 BB03 BC02 CA07 EA01 4D067 CA01 CA07 GA06 GB10 4F033 PA04 PB04 PB12 PD02 PD03

Claims (6)

[Claims] 1. A concrete crushing apparatus for crushing concrete by spraying high-pressure water onto a concrete structure, comprising: an apparatus main body; a water pipe section supported by the apparatus main body, for supplying high-pressure water and spraying the water from a tip end side; A support unit provided on one side of the apparatus main body, for supporting rotation of the distal end side of the water supply pipe unit with a predetermined swing angle and prohibiting movement in the axial direction thereof, A rotatable portion rotatably provided on the other side of the apparatus main body and having a rotary hole at a position offset from the rotation axis for supporting the distal end side of the water pipe section so as to be relatively rotatable. Concrete crushing equipment. 2. The concrete crushing device according to claim 1, wherein the device main body includes a driving unit that rotates the rotating unit. 3. The driving unit includes a driving source and a first gear connected to the driving source and driven to rotate, and the rotating unit receives a rotation driving force from the first gear. The concrete crushing apparatus according to claim 2, further comprising a second gear. 4. The concrete crushing apparatus according to claim 3, wherein the first gear and the second gear mesh directly with each other. 5. The water pipe section is relatively movable in a tubular body provided between the support portion and the rotary hole, and in the tubular body such that a distal end side protrudes from a distal end side of the tubular body. The concrete crushing device according to any one of claims 1 to 4, wherein the nozzle and the nozzle shaft are integrally fixed by a fixing member. . 6. A ball joint having a substantially spherical sliding surface is formed at a position corresponding to the support portion and the rotation hole of the cylindrical body, and the ball joint includes the support portion and the rotation hole. 6. The concrete crushing device according to claim 5, wherein the concrete crushing device is joined to the ball joint receivers respectively formed so as to be angularly displaceable.