JPH0541726U - Concrete cutting equipment - Google Patents

Abstract

(57) [Summary] [Purpose] When partially cutting a concrete structure, only the necessary parts are cut accurately and efficiently. Constitution: A support portion 7 whose end is fixed to a concrete structure 6 is supported, and while being supported by the support portion 7, the pedestal 4 is movably supported at a position facing the cut surface 6a. A feed mechanism 5 is provided, and further, a pedestal 4 is provided with a second feed mechanism that movably supports a gripping member 3c that holds the chain saw 2 capable of cutting concrete, and the chain saw 2 is cut in the cutting direction by the both feed mechanisms. It is configured to feed in the cutting direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete cutting device for cutting a concrete structure using a chain saw.

[0002]

[Prior Art]

 For cutting a concrete structure, for example, as shown in FIG. 14, a cutting device having a disk-shaped blade 51 such as a cutting grindstone is used. By rotating the blade 51 and sending it forward, a required depth is reached. The length and length are cut.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional cutting device, when the concrete structure is partially cut from the use of the disc-shaped blade, the starting point or the end point of the cutting is the portion which is not desired to be cut (the diagonal line shown in FIG. 14). There are inconveniences that extend up to the department. There is also a means for crushing the concrete structure with a concrete breaker, but in this case as well, the structure is additionally crushed. Furthermore, since a flat fracture surface cannot be obtained, there is a problem that the fracture surface must be shaped after fracture.

Therefore, in the present invention, when cutting a concrete structure, it is a technical problem to be solved to provide a concrete cutting device which can accurately cut only a desired cutting portion and is excellent in workability. It is a thing.

[0005]

[Means for Solving the Problems]

 A technical means for solving the above-mentioned problems is to provide a support for fixing a concrete cutting device to a concrete structure and a pedestal that is supported by the support at a position facing a cut cross section of the concrete structure. And a gripping part provided on the pedestal for gripping a concrete saw that can cut concrete in a predetermined posture.The gantry is moved along the cut surface by the first feeding mechanism provided in the support part. In addition to being configured to be movable, the gripping part is configured to be movable in a direction perpendicular to the cross section to be cut by a second feeding mechanism provided on the frame.

[0006]

[Action]

 The chain saw that can cut concrete is gripped by the gripping member, and the supporting part is fixed to the concrete structure to support the pedestal at a position facing the surface to be cut. Then, the second feed mechanism moves the gripping member in the direction perpendicular to the cut surface to feed the chain saw in the cutting direction, and the first feed mechanism moves the gantry along the cut surface to cut the saw. Direction, and proceed with the cutting of the concrete structure.

[0007]

【Example】

 Next, a first embodiment of the present invention will be described with reference to the drawings. 1 is a plan view of the concrete cutting device, FIG. 2 is a side view thereof, and FIG. 3 is a front view thereof. 4 is a sectional view taken along the line AA in FIG. 2, FIG. 5 is a sectional view taken along the line BB of FIG. 3, and FIG. 6 is a sectional view taken along the line CC of FIG. 1 to 6, a concrete cutting device 1 includes a support bracket 7 fixed to a cut surface 6a of a concrete structure 6 at a predetermined interval, and a first feeding mechanism 5 provided on the support bracket 7. It is mainly configured by a gantry 4 supported, a holding member 3c supported by the second feeding mechanism 3 provided on the gantry 4, and a chain saw 2 held by the holding member 3c.

The support bracket 7 is provided with an L-shaped seat 7a at the base end of a forked rod-shaped leg 7b made of shaped steel or the like, and a support for supporting the first feed mechanism 5 at the other end. A part 7c is provided. An anchor bolt (not shown) is passed through the hole formed in the L-shaped seat 7a to fix the support bracket 7 to the cut surface 6a. The support portion 7c and the leg portion 7b are pin-coupled to each other, so that the support portion 7c can rotate in a plane perpendicular to the cut surface 6a, and can be fixed at a required angular position by a fixing lever 7e. .. In this embodiment, the rotation angle range of the support portion 7c is about 30 ° from the plane perpendicular to the cut surface 6a. (See Figure 2).

Next, the first feeding mechanism 5 will be described. The Y guide shafts 5a, 5a, both ends of which are supported by the support portion 7c, are cylindrical shafts and are provided at a predetermined interval and in parallel with the cut surface 6a, and the bearings 4b, 4b are mounted thereon. It is movably attached. Further, idle sprocket wheels 7d, 7d are attached to the support portions 7c, 7c on both sides, and the chain 5c is hung in parallel with the Y guide shaft 5a. The cylindrical bare ring 4b is attached to the hole of the base 4a. The base 4a is provided on the pedestal 4, and the drive unit 5e is mounted on the lower surface of the base 4a. A shaft 5i is rotatably supported by a bearing 5h provided in the case of the drive unit 5e, and a feed sprocket 5f and a Y-direction feed handle 5g are attached to the shaft 5i. The chain 5c hung on the feed sprocket 5f forms a loop passing through the idle sprocket 7d, 7d, and both ends are attached to the left and right ends of the base 4a by bolts 5d. Since the first feeding mechanism 5 is configured as described above, by turning the Y-direction feeding handle 5g and driving the chain 5c, the pedestal 4 is moved in the cutting direction along the cut surface 6a on the Y guide shaft 5a. It can be moved in the direction of arrow Y.

Next, the second feeding mechanism 3 will be described. As shown in FIG. 4, two X guide shafts 3a, 3a and a screw shaft 3b extend from the gantry 4 in a direction perpendicular to the Y guide shaft 5a in parallel with each other. The X guide shaft 3a is a cylindrical shaft whose base end is fixed to the mount 4, and a bearing 3d is slidably mounted on the shaft. The bearing 3d is attached to the hole of the grip member 3c. The screw shaft 3b has a cylindrical shape with no screw formed on the base end side, and has a male screw formed on the tip end side. The screw shaft 3b is rotatably supported by the pedestal 4 via the bearing 3f, and at the base end side tip end. Is equipped with an X-direction feed handle 3g. The screw shaft 3b is screwed into the nut 3e fixed to the grip member 3c. Further, the gripping member 3c is formed in a substantially square shape according to the shape of the main body of the chain saw 2, and grips the chain saw 2 in a posture in which the longitudinal direction of the blade 2b of the chain saw 2 is in the same direction as the X guide shaft 3a. ing. Since the second feed mechanism 3 is configured as described above, the X-direction feed handle 3g is rotated and the screw shaft 3b is rotated, so that the grip member 3c is perpendicular to the cut surface 6a on the X guide shaft 3a. It can be moved in the direction (arrow X direction).

The chain saw 2 is a sprocket that is electro-deposited with diamond and has a chain 2 a having a blade formed to cut concrete and is attached to the blade 2 b, and is rotated by hydraulic oil supplied from a hydraulic unit (not shown). The chain 2a is configured to be driven via the above. Further, cutting fluid (water in this embodiment) supplied from the outside through a nozzle (not shown) is dropped onto the blade 2b so that the chain 2a can radiate heat.

As described above, the concrete cutting device 1 supports the chain saw 2 at a position facing the cut surface 6a of the concrete structure 6, and then uses the second feeding mechanism 3 and the first feeding mechanism 5 to support the saw. , The cutting direction along the cutting surface 6a within a predetermined range with respect to the cutting surface 6a (see the moving position of the blade 2b shown by the chain double-dashed line in FIG. 1), and the cutting surface vertical direction (both the cutting direction). Therefore, the concrete structure 6 can be cut accurately along a required locus. In addition, since it is not necessary for the worker to directly support the chain saw 2, working efficiency can be improved and safety can be improved.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a fragmentary perspective view showing a state in which the wall surface of the communication cable manhole buried in the ground is cut by the concrete cutting device. In the figure, a communication cable manhole (also referred to as a concrete structure) 10 buried in the ground is a concrete box, a work entrance 10a is formed on the upper part thereof, and a side wall is provided with a casing. A cable lead-in port 10b is formed, and a communication cable 11 is drawn into the manhole 10 and then connected. The concrete cutting device 1a according to the present embodiment is the concrete cutting device 1 according to the first embodiment described above, except that the support bracket 7 is changed to the support bracket 12 described below so as to be suitable for the manhole 10. Others have the same configuration as the concrete cutting device 1.

The support bracket 12 has disk-shaped contact members 12b attached to both ends of the leg 12a, and is substantially the same as the support 7c according to the first embodiment at a position near one end of the leg 12a. A supporting portion 12c having a structure is provided. The leg portion 12a is composed of a rectangular tubular portion and a shaft portion inserted into the tubular portion, is configured to be expandable and contractible, and has female threads formed at both ends. The contact member 12b has a disk-shaped plate to which a screw rod is vertically attached, and is screwed into the support portion 12c. The contact brackets 12b are in contact with the facing surfaces of the manhole 10 and are fixed in a stretched state so that the support bracket 12 is fixed at a required position. Further, the support bracket 12 supports the pedestal 4 via the first feeding mechanism 5 similarly to the concrete cutting device 1 according to the first embodiment described above, and the second feeding mechanism provided on the pedestal 4 supports the pedestal 4. The chain saw 2 is gripped by the supported gripping member. Then, similarly to the concrete cutting device 1 according to the first embodiment described above, by operating the fixing lever 12e provided on the support portion 12c, the direction of the support portion 12c is changed and the cut surface 10c is mounted. The mounting angle of the table 4 can be adjusted. Therefore, by turning the Y-direction feed handle 5g, the chain saw 2 mounted on the gantry 4 can be fed in the cutting direction (arrow Y direction) along the cut surface 10c, and the X-direction feed handle 3g can be turned. With this, the chain saw 2 can be fed in the cutting direction (arrow X direction). A hydraulic hose 13 and a water hose 14 are drawn in from the doorway 10a and are connected to the chain saw 2. The hydraulic hose 13 is for hydraulically driving the chain 2a, and the water hose 14 is for cutting fluid.

Since the concrete cutting device 1a according to the second embodiment is configured as described above, it is possible to accurately cut the wall surface of the communication cable manhole 10 from the inside with a desired locus. Further, since the worker is not forced to work in an unreasonable posture, work efficiency is improved and safety is also improved.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view showing a state in which a block of a concrete structure is partially cut by a concrete cutting device. In the figure, a concrete cutting device 1b is adjacent to a concrete block (also referred to as a concrete structure) 20 and stands by itself. The concrete cutting device 1b according to the present embodiment is the concrete cutting device 1 according to the first embodiment described above, in which the support bracket 7 is changed to a stand 21 described below so as to be suitable for cutting the concrete block 20, Others have the same configuration as the concrete cutting device 1. The stand 21 is configured such that a cylindrical portion 21b is vertically provided on a base 21a placed on a floor surface, and a fixing member 22 is provided on an upper end portion of a leg portion 21c inserted into the cylindrical portion 21b. .. As shown, the base 21a is formed in a bifurcated shape, and a leg seat is attached to the lower surface of the base 21a. The tubular portion 21b is a tubular body having a rectangular cross section, and is configured such that the leg portion 21c is inserted and the height is adjustable by vertically moving the leg portion 21c. Further, a fixing member 22 is provided so as to project in the horizontal direction (direction of arrow Y) from the upper end of the tubular portion 21b. The shaft of the fixing member 22 is screwed into a threaded portion provided on the tubular portion 21b, and the handle 22a is rotated to move the fixing member 22 forward and backward. The contact plate 22b provided at the tip of the fixing member 22 is fixed to the side surface 20a of the concrete block 20. Further, a support portion 21d having substantially the same structure as the support portion 7c according to the first embodiment described above is provided on the upper end portion of the leg portion 21c, and the Y of the first feeding mechanism 5 similar to that of the first embodiment described above is provided. The guide shafts 5a, 5a are attached in a cantilever state, and a mount 4 is attached to the Y guide shafts 5a, 5a. The mount 4 is equipped with a second feed mechanism and is supported by the second feed mechanism. The chain saw 2 is gripped by the gripping member. Therefore, the concrete cutting device 1b, like the concrete cutting device 1 according to the first embodiment described above, rotates the X-direction feed handle and the Y-direction feed handle to turn the chain saw 2 mounted on the pedestal 4 in the cutting direction ( It can be fed in the direction of arrow Y) and the direction of cut (direction of arrow X). As in the concrete cutting device 1 according to the first embodiment described above, the direction of the leg portion 21c is changed by operating the fixing lever 21e provided on the leg portion 21c, and the pedestal 4 is attached to the cut surface. The attachment angle can be adjusted. The hydraulic hose 13 and the water hose 14 connected to the chain saw 2 are as described in the second embodiment.

Since the concrete cutting device 1b according to the present embodiment is configured as described above, it is possible to accurately cut only the portion 23 of the concrete block 20 to be removed. Even when the cutting site is at a high place, the concrete cutting device 1b can be attached to a dedicated boom or the like to facilitate the cutting work and contribute to the safety of the work.

Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 9 is a top view showing a state where the side surface of the cylindrical hole of the concrete structure is partially cut from the inside by a concrete cutting device, and FIG. 10 is a broken side view of the relevant part. In both figures, the support bracket 31 is placed on the upper end portion 30b of the cylindrical hole 30a of the concrete structure 30 and supports the entire concrete cutting device 1c. The leg portion 31a of the support bracket 31 extends in the outer circumferential direction in a three-pronged manner from the disc-shaped bottom portion of the drive table 32 arranged at the center of the cylindrical hole 30a, and then bends downward so that each tip portion 31b is It is placed at the upper end 30b of the cylindrical hole 30a. A height adjusting member 31c is provided on the tip end portion 31b, and the position of the tip end portion 31b can be adjusted in the vertical direction by rotating the adjustment bar. A fixed seat 31d is provided on the leg 31a so as to project from the inner side of the tip 31b, and a fixing member 31e is screwed into the female thread formed on the fixed seat 31d. It is in contact with the inner surface. As described above, the support bracket 31 is adjusted to a desired posture and then fixed to the upper end portion 30b.

A circumferential feed mechanism (also referred to as a first feed mechanism) 33 is provided above the drive table 32, and a support shaft 33 a rotatably supported by a bearing (not shown) is provided from the feed mechanism 33. A radial feed mechanism (also referred to as a second feed mechanism) 34 is provided at a lower end portion of the cylindrical hole 30a so as to extend vertically downward at a central position thereof. Explaining the circumferential feed mechanism 33, a worm wheel 33b is attached to the support shaft 33a, and a worm 33c meshing with the worm wheel 33b is attached to a feed shaft 33d provided at a right angle to the support shaft 33a. .. The feed shaft 33d extends to a position near the upper end 30b of the cylindrical hole 30a, and a circumferential feed handle 33e is attached to the end of the feed shaft 33d. Therefore, when the handle 33e is turned, the worm wheel 33b is rotated via the worm 33c, and further, with the rotation of the support shaft 33a, the radial feed mechanism 34 is entirely moved in the circumferential direction (arrow C direction) of the cylindrical hole 30a. Turn to.

Next, the radial feed mechanism 34 will be described. The radial feed mechanism 34 is suspended from a suspension member 34a attached to the lower end of the support shaft 33a, and a pedestal 35 is mounted as described below. The radial feed mechanism 34 has substantially the same structure as the second feed mechanism 3 of the concrete cutting device 1 according to the first embodiment, and is for moving the gantry 35. The suspension member 34a is a rectangular rod mounted orthogonally to the support shaft 33a, and radial guide shafts 34d are attached to the receiving plates 34c provided at both ends thereof in a state parallel to the suspension member 34a, and a screw shaft 34e. Is rotatably supported. The radial guide shaft 34d and the screw shaft 34e are arranged parallel to each other. A bearing (not shown) is slidably mounted on the radial guide shaft 34d, and the bearing is attached to the hole of the mount 35. Further, a female screw portion is formed on the gantry 35, and the screw shaft 34e is screwed into the female screw portion. A radial feed handle 34f is attached to the shaft end of the screw shaft 34e. Since the radial feed mechanism 34 is configured as described above, when the handle 34f is rotated, the pedestal 35 moves on the radial guide shaft 34d in the radial direction of the cylindrical hole 30a as the screw shaft 34e rotates. Slide in the direction of arrow R).

Further, an axial feed mechanism 36 is provided on the lower surface of the gantry 35. An axial guide shaft 36a is mounted vertically downward on the frame 35, and a screw shaft 36b is rotatably supported in parallel with the axial guide shaft 36a. Axial direction A grip member 37 is slidably mounted on the inner shaft 36a via a bearing. A screw shaft 36b is screwed into the female screw portion formed on the grip member 37, and a radial feed handle 36c is attached to the shaft end of the screw shaft 36b. Since the axial feed mechanism 36 is configured as described above, when the handle 36c is rotated, the gripping member 37 moves in the vertical direction (arrow Z direction) on the axial guide shaft 36a as the screw shaft 36b rotates. Move. Then, as shown in the drawing, the gripping member 37 grips the chain saw 2 in a posture in which the blade 2b is in a substantially horizontal direction. The chain saw 2 is the same as that described in the first embodiment.

Since the concrete cutting device 1c according to the present embodiment is configured as described above, the chain saw 2 can be fed in the cutting direction and the cutting direction within the cylindrical hole of the concrete structure 30, and further, the cylindrical hole It can also be fed in the axial direction. Therefore, in the case of partially cutting the cylindrical hole side surface 30a, it is possible to accurately cut along the required locus.

Next, a fifth embodiment of the present invention will be described with reference to the drawings. 11 is a plan view of the concrete cutting device, FIG. 12 is a DD sectional view of FIG. 11, and FIG. 13 is a main part sectional view showing an EE section of FIG. 11 and 13 show that the stand 41 of the concrete cutting device 1d is placed on the floor surface 40a of the concrete structure 40, the concrete cutting device 1d is supported in a desired posture, and is gripped by the gripping member 48. It shows a state in which the surface to be cut 40b facing the chain saw 2 can be cut. The stand 41 includes a base 41a placed on a floor surface 40a, and a column 41b vertically provided on the base 41a. An upper end of the column 41b is supported by a support bracket 42 fixed to a cut surface 40b. There is. The support bracket 42 is provided with a plate-shaped seat 42a fixed to the floor surface 40a via anchor bolts or the like at the base end of the rod-shaped leg 42b, and the other end 42c to which the upper end of the column 41b is attached. It is being done. A lift mechanism 41c is incorporated in the column 41b, and a support portion 43a of a first feeding mechanism 43, which will be described later, is attached. The lift mechanism 41c is connected to the drive device 41e via an oil hose 41d, and the lift mechanism 41c is operated by operating the oil feed pedal 41f of the drive device 41e to move the support portion 43a in the vertical direction (arrow Z direction). ) Is configured so that it can be moved to.

Next, the first feeding mechanism 43 will be described. Support arms 43b and 43b are horizontally projected from the support portions 43a and 43a attached to the stands 41 and 41 arranged on the left and right, and both ends of the Y guide shaft 43c are supported. Further, a screw rod 43d is rotatably supported on the support arms 43b and 43b, and Y-direction feed handles 43e and 43e are attached to both ends of the screw rod 43d. The Y guide shaft 43c and the screw rod 43d are arranged in parallel with the cut surface 40b, and a bearing 44a is slidably mounted on the Y guide shaft 43c. The bearing 44a is attached to the hole portion of the moving base 44, and the female rod portion formed on the moving base 44 is screwed with the screw rod 43d. Therefore, when the Y-direction feed handle 43e is rotated, the movable base 44 slides on the Y guide shaft 43c in the cutting direction (arrow Y direction) along the cut surface 40b as the screw rod 43d rotates.

Next, the rotating mechanism will be described. A case 45a of the gear mechanism is provided on the lower surface of the moving table 44, and an outer shaft 45b is rotatably supported on the case 45a via a bearing. A worm wheel 45c is attached to a cylindrical outer shaft 45b provided in a direction orthogonal to the Y guide shaft 43c, and a rotating case 46a is attached to an end portion of the worm wheel 45c. A mount 47 is attached to the. A support shaft (not shown) is provided on the case 45a, and a worm (not shown) that meshes with the worm wheel 45c and a rotating handle 45d are attached. Since the rotating mechanism is configured as described above, when the rotating handle 45d is rotated, the outer shaft 45b is rotated via the worm wheel 45c, and the frame 47 is rotated around the outer shaft 45b together with the rotating case 46a. Turn to.

Next, the second feeding mechanism will be described. An X moving shaft 46c having a diameter smaller than the diameter of the cylindrical hole is inserted through the outer shaft 45b. The X movement shaft 46c is rotatably supported by a bearing 46d provided on the case 45a and a bearing 46e provided on the rotation case 46a, and the rotation of the X movement shaft 46c is not transmitted to the outer shaft 45b. I am sick. Further, an X-direction feed handle 46f and a spur gear 46g are attached to the X movement shaft 46c. Two X guide shafts 47a, 47a and a screw shaft 47b extend in the same direction as the X moving shaft 46c from a mount 47 attached to the lower part of the rotating case 46a. The X guide shaft 47a is a columnar shaft whose base end is attached to the pedestal 47, and a bearing provided on the grip member 48 is slidably mounted. The screw shaft 47b is rotatably supported by the pedestal 47 and is screwed into a female screw portion formed on the holding member 48. Further, a spur gear 46h that meshes with the spur gear 46g is attached to the end of the screw shaft 47b. The gripping member 48 is formed in a substantially square shape according to the shape of the body of the chain saw 2, and grips the chain saw 2 in a posture in which the longitudinal direction of the blade 2b is in the same direction as the X guide shaft 47a. Since the second feed mechanism is configured as described above, when the X-direction feed handle 46f is turned, the screw shaft 47b rotates via the spur gears 46g and 46h, and the gripping member 48 moves on the X guide shaft 47a. Therefore, the chain saw 2 can be fed in the direction perpendicular to the cut surface 40b (the direction of the arrow X). Further, as described above, when the turning handle 45d is turned, the gantry 47 is turned about the outer shaft 45b by the turning mechanism, so that the chain saw 2 held by the holding member 48 is placed on the cut surface 40b. It can be rotated about a vertical axis.

As described above, the concrete cutting device 1d according to the present embodiment is configured to be able to feed the chain saw 2 in the cutting direction and the cutting direction along the cut surface 40b, so that the concrete structure 40 In the case of partially cutting the surface to be cut 40b, it is possible to accurately cut along the required locus. Moreover, since the chain saw 2 can be rotated around the axis in the cutting direction, it can be cut along a locus including a curved line.

[0028]

[Effect of the device]

 As described above, the concrete cutting device according to the present invention has an effect of being able to accurately and efficiently cut only a necessary portion when partially cutting a concrete structure.

[Brief description of drawings]

FIG. 1 is a plan view of a concrete cutting device.

FIG. 2 is a side view of the concrete cutting device.

FIG. 3 is a front view of the concrete cutting device.

4 is a sectional view taken along line AA of FIG.

5 is a main-portion cross-sectional view showing a BB cross section in FIG. 3;

6 is a cross-sectional view of a main part showing a CC cross section of FIG.

FIG. 7 is a fragmentary perspective view illustrating a usage state of the concrete cutting device.

FIG. 8 is a perspective view illustrating a usage state of the concrete cutting device.

FIG. 9 is a front view of the concrete cutting device.

FIG. 10 is a side view of the concrete cutting device.

FIG. 11 is a front view of the concrete cutting device.

FIG. 12 is a DD sectional view of FIG. 11.

FIG. 13 is a sectional view of a key portion showing an EE section of FIG. 11.

FIG. 14 is a front view illustrating a cutting state by a blade according to a conventional example.

[Explanation of symbols]

 1, 1a, 1b, 1c, 1d Concrete cutting device 2 Chain saw 2a Chain 3,34 Second feeding mechanism 3c, 37, 48 Gripping member 4, 35, 47 Frame 5, 33, 43 First feeding mechanism 6, 10, 20 , 30, 40 Concrete structure 6a, 10c, 30a, 40b Cut surface 7, 12, 31, 42 Support bracket

Claims (1)

[Scope of utility model registration request] 1. A support unit that can be fixed to a concrete structure, a pedestal supported by the support unit at a position facing a surface to be cut of the concrete structure, and a chain saw provided on the pedestal and capable of cutting concrete. And a cradle that grips the pedestal in a predetermined posture, and the gantry is configured to be movable along the cut surface by a first feeding mechanism provided in the support section, and the gantry is mounted on the gantry. A concrete cutting device characterized by being configured to be movable in a direction perpendicular to the surface to be cut by a second feeding mechanism provided.