JP4288064B2 - Hanging piece cutting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hanging piece cutting device. In more detail, when a crane is used to carry a projection that is integrally provided on a large structure by welding, for example, a steel bridge under construction, a steel deck of a ship under construction, etc. Alternatively, the present invention relates to a suspension piece cutting device suitable for cutting a suspension piece temporarily used for hooking after construction (or after construction).
[0002]
[Prior art]
Gas cutting using acetylene gas is widely used for cutting the above-described suspension piece. However, in the case of gas cutting, there is a problem that the coating on the back side of the hanger piece is burnt or peeled off due to heat. In addition, in the case of gas cutting, it is said that cutting the grinder after labor and time-consuming cutting cannot be omitted because the upper part is cut to some extent from the base of the suspension piece and the cut surface is bumpy. There's a problem.
[0003]
Therefore, in order to cope with the above-described problems, a technique of cutting a suspension piece using a band saw robot has been proposed (see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-296530
[Problems to be solved by the invention]
In the technique using the band saw robot described above, a magnet chuck is used to fix the band saw robot to the structure.
[0006]
When fixing to a structure using a magnet, a sufficient attractive force may not be obtained depending on the state of the fixing surface. For example, when the thickness of the coating of the structure is 0.5 mm, the magnet's attractive force is about 1/10.
[0007]
If the suction force is insufficient, the main body of the apparatus vibrates or moves during the cutting process, resulting in a shortened life of the saw blade and a cause of bending.
[0008]
The present invention has been made to solve the above-described problems, and the problem of the present invention is that the structure and the main body frame can be securely fixed, and the thermal influence on the coating is small, and It is providing the hanging piece cutting device which can abbreviate | omit the grinder peeling after a cutting | disconnection.
[0009]
[Means for Solving the Problems]
The suspension piece cutting device according to claim 1, wherein the suspension piece cutting device according to claim 1 is a suspension piece cutting device that cuts the protrusion integrally provided on the upper surface of the structure, and is a body frame through which the protrusion can pass. A band saw blade drive unit provided with a saw blade housing having an opening through which the projection can pass through the main body frame is provided so as to be horizontally movable with respect to the projection, and the opening of the band saw blade drive unit The band saw blade is provided at the lower end of the blade so that a part of the band saw blade is exposed, the band saw blade is provided so as to run horizontally near the base of the projection, and the projection is fixed to the main body frame. the clamping device is provided, said clamping device main body frame disengaged to each of the pair of left and right set plate provided on the right and left base frame of the lower to the square groove of constant pitch opening upward freely prismatic cross At least one rod-shaped stopper, a clamp arm that is slidably fitted to the rod-shaped stopper and extends substantially perpendicularly to the rod-shaped stopper and substantially horizontally, and the protrusion provided at the tip of the clamp arm A clamping unit comprising a fastening screw for fixing the projection to the main body frame, and the front side of the projection is brought into contact with the rod-like stopper by the clamping device, and the left side surface of the projection is brought into contact with the left set plate. Then, after fixing the protrusions to the main body frame, the gist is to horizontally move the band saw blade drive unit with respect to the protrusions to cut the vicinity of the base of the protrusions.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0012]
1-4 is a figure explaining the whole structure of the hanging piece cutting device based on this invention. As shown in FIG. 1 to FIG. 4, the hung piece cutting apparatus 1 generally shown includes a main body frame 5 that supports the band saw blade drive unit 3 so as to be movable in the front-rear direction.
[0013]
The main body frame 5 has a pair of left and right base frames 7 (a, b) extending parallel to the front-rear direction (the direction orthogonal to the paper surface in FIG. 1, the left-right direction in FIGS. 2 and 3). A pair of left and right columns 9 (a, b) are erected on each of the front end portion and the rear end portion of the frame 7 (a, b), and a horizontal beam member 11 (f, r) is provided between the pair of left and right columns. The structure is integrally coupled.
[0014]
The column 9 (a, b) is provided so as to extend further upward than the beam member 11 (f, r), and a grip rod 13 (f, b) that horizontally connects the columns 9 a and 9 b at the upper end thereof. r) is provided in parallel with the beam member 11 (f, r).
[0015]
A guide rail 15 for linear motion bearing extending over the front end and the rear end of the base frame 7a is attached to the outer surface of the left base frame 7a of the main body frame 5, and the outer end of the right base frame 7b. The part is provided with a bearing guide part (not shown) for clamping with a pair of upper and lower radial bearings (not shown).
[0016]
On the other hand, the band saw blade drive unit 3 includes a saw blade housing 23 having an opening 21 through which a protrusion (suspending piece) 19 provided integrally on the upper surface of the structure 17 to be cut can pass. The saw blade housing 23 is provided with a drive wheel 29 and a driven wheel 31 that are rotationally driven by a drive motor 27 via a speed reducer 25 with the opening 21 interposed therebetween. A band saw blade 33 is wound around the drive wheel 29 and the driven wheel 31.
[0017]
The saw blade housing 23 of the band saw blade drive unit 3 has a tension adjusting mechanism 35 for adjusting the tension of the band saw blade by adjusting the distance between the drive wheel 29 and the driven wheel 31. Is provided.
[0018]
As shown in FIGS. 3, 5 and 6, on the outside of the base frame 7 (a, b), there is a chain 37 (a, b) extending in the front-rear direction along the base frame 7 (a, b). It is stretched. Both ends of the chain 37 (a, b) are fixed via tension adjusting means provided on the base frame 7 (a, b).
[0019]
The saw blade housing 23 of the band saw blade drive unit 3 includes a first bearing box 41 having a linear motion bearing 39 slidably engaged with the guide rail 15 and a bearing guide portion of the base frame 7b. A second bearing box (not shown) provided with a radial bearing (not shown) that is movably clamped from above and below is provided.
[0020]
Therefore, the band saw blade drive unit 3 is guided by the guide rail 15 and the bearing guide portion, and is movable in the front-rear direction on the base frame 7 (a, b).
[0021]
A pair of driven sprockets 43 (a, b) are rotatably supported on the first bearing box 41 described above. A drive motor 45 with a reduction gear is provided in the saw blade housing 23 located above the chain 37a, and a drive sprocket 47 is provided on the output shaft of the drive motor 45.
[0022]
As shown well in FIGS. 5 and 6, the horizontally stretched chain 37a reaches the upper drive sprocket 47 via the driven sprocket 43a, and horizontally from the drive sprocket 47 via the lower driven sprocket 43b. It is stretched so that it can run.
[0023]
The output of the drive motor 45 is transmitted via the connecting shaft 49 to another similar drive mechanism (not shown) provided in the saw blade housing 23 located above the chain 37b on the base frame 7b. It has come to be.
[0024]
In the above configuration, after the tension of the band saw blade 33 is appropriately adjusted by the tension adjusting means 35, the drive motor 27 is driven (in the direction of the arrow), and then the drive motor 45 for feeding the band saw blade drive unit is appropriately rotated. For example, the band saw blade drive unit 3 can be moved closer to or backward from the protrusion (hanging piece) 19 to be cut.
[0025]
Next, a clamp device 51 for securely fixing the projection (suspending piece) 19 provided integrally with the structure to the main body frame 5 will be described with reference to FIGS.
[0026]
A clamp device 51 shown generally is a pair of left and right set plates 53 (a, b) fixed to the inner surface of the base frame 7 (a, b), and is detachable from the set plates 53 (a, b). The clamp unit 55 is included.
[0027]
A left set plate 53a extending in the front-rear direction along the base frame 7a is attached to the inside of the base frame 7a by a bolt 56. A plurality of spacers 57 are inserted at an appropriate interval between the base frame 7a and the left set plate 53a, and a gap d is formed between the base frame 7a and the left set plate 53a. .
[0028]
Further, inside the base frame 7b, a right set plate 53b extending in the front-rear direction is attached by bolts (not shown) like the left set plate 53a. The left and right set plates 53 (a, b) have a comb-tooth shape having square grooves 59 with a constant pitch opened upward.
[0029]
The clamp unit 55 has a rod-like stopper 61 having a square cross section that engages with the square grooves 59 of the left and right set plates 53 (a, b), and is slidably fitted to the rod-like stopper 61, and this rod-like stopper. A clamp arm 63 that extends at a right angle to 61 and substantially horizontally, and a clamping screw 67 that is screwed to the front end portion of the clamp arm 63 so as to be vertically movable with respect to the left set plate 53a.
[0030]
Further, the clamp arm 63 is provided with a lock lever 69 provided with a lock screw for fixing the slide of the clamp arm 63 with respect to the rod-shaped stopper 61.
[0031]
A flange 65 that is detachably fitted in a gap d formed between the base frame 7a and the left set plate 53a is integrally provided at the left end portion of the rod-shaped stopper 61.
[0032]
FIG. 7 shows an example in which two clamp units 55 are used. However, when the projection (hanging piece) 19 is small, the clamp unit 55 can be fixed with one clamp unit 55. Further, as shown in FIG. 10, a fixed clamp unit 73 provided with an anvil 71 instead of the clamping screw 67 at the tip of the clamp arm 63 is mounted on the rod-shaped stopper 61, and the protrusion is jointed with the clamp unit 55. It is also possible to hold the (suspending piece) 19 from both sides.
[0033]
A pair of left and right fixed casters 75 are provided as front wheels as shown in FIGS. 2 and 3 at the lower portion of the support column 9 (a, b) standing on the front side of the left and right base frames 7 (a, b). is there. In addition, a pair of left and right casters 77 with a lift mechanism are provided as rear wheels at the lower portion of the support column 9 (a, b) standing on the rear side of the base frame 7 (a, b).
[0034]
The caster 77 with a lift mechanism used for the rear wheel is a known caster. When the foot pedal 79 is stepped on, the wheel shown in FIG. 11 (b) is raised from the state where the wheel is lowered as shown in FIG. 11 (a). It can be fixed to the state.
[0035]
In the state where the wheel is raised as shown in FIG. 11 (b), the suspended piece cutting device 1 is composed of a stand 81 with a horizontal height adjusting bolt and a fixed caster 75 provided on the rear wheel side of the base frame 7 (a, b). Can be installed horizontally on the upper surface of the structure 17.
[0036]
Note that the rear wheel can be fixed in a lowered state by stepping on the foot pedal 79 again. Therefore, in the state where the rear wheel is lowered, the suspension piece cutting device 1 can be easily moved to the cutting position using the front wheel and the rear wheel.
[0037]
Further, the band saw blade cutting amount control in the band saw blade drive unit 3 is controlled under the control of the NC device 85 so that the motor load is detected and the load becomes constant, or the feed amount is kept constant. It comes to control with. The power supply to the NC device 85 is connected via a power cord 89 equipped with a waterproof connector 87. Note that the cutting fluid is supplied from the cutting fluid tank 91 to the cutting portion of the band saw blade 33 through the pipe 93.
[0038]
The case where the comparatively small protrusion (suspending piece) 19 provided integrally on the upper surface of the structure in the above configuration is cut using one clamp unit 55 will be described.
[0039]
The hanging piece cutting device 1 is placed on the upper surface of the structure, and one bar-shaped stopper 61 is set on the front side of the left and right set plates 53 (a, b).
[0040]
Next, the hanging piece cutting device 1 is moved, and the projection (hanging piece) 19 is brought into contact with the rod-shaped stopper 61 and the left set plate 53a on the reference side.
[0041]
Next, the rear wheel is raised to lower the hanging piece cutting device 1, and the tightening screw 67 of the clamp unit 55 is turned to fix the projection (hanging piece) 19 to the hanging piece cutting device 1, and the band saw blade drive unit 3 is driven. The band saw blade 33 is driven to rotate by driving the motor 27, and the band saw blade drive unit feed motor 45 is driven to rotate appropriately to send the band saw blade 33 to the projection (suspended piece) 19 for cutting. Do.
[0042]
When the cutting is completed, the rotation of the band saw blade 33 is stopped, and the projection (suspending piece) 19 is released to remove the projection (suspending piece) 19 from the cutting portion. When the protrusion (hanging piece) 19 is removed from the cutting portion, the saw blade drive unit 3 is moved back to the initial position, and the cutting process is completed.
[0043]
In the above-described cutting operation, the cutting amount of the band saw blade is automatically performed under the control of the NC device 85. Further, when the projection (hanging piece) 19 is large, the two clamp units 55 are used for cutting.
[0044]
【The invention's effect】
According to the first aspect of the present invention, since the projection (hanging piece) is fixed to the main body of the hanging piece cutting device, it can be reliably fixed without being affected by the roughness of the fixing surface.
[0045]
As a result, there is no occurrence of bending at the time of cutting. Since the vibration during cutting is also suppressed, there is an effect such as extending the life of the saw blade. Moreover, since the suspension piece cutting device wheel is provided, the movement on the structure is facilitated, and at the same time, an obstacle during the movement can be avoided.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram (front view) of the overall configuration of a hanging piece cutting device according to the present invention.
FIG. 2 is an explanatory diagram (left side view) of the overall configuration of the hanging piece cutting device according to the present invention.
FIG. 3 is an explanatory diagram (plan view) of the overall configuration of a hanging piece cutting device according to the present invention.
FIG. 4 is an explanatory diagram (back view) of the overall configuration of the hanging piece cutting device according to the present invention.
5 is a cross-sectional view taken along line AA in FIG.
6 is a detailed view of a P portion in FIG. 3;
7 is a cross-sectional view taken along line BB in FIG.
8 is a cross-sectional view taken along the line CC of FIG.
9 is a cross-sectional view taken along the line DD of FIG.
FIG. 10 shows an example in which two clamp units 55 are used to fix a suspension piece.
11A and 11B are explanatory views (left side view) of a caster 77 with a lift mechanism (rear wheel). FIG. 11A shows a state where the rear wheel is lowered, and FIG. 11B shows a state where the rear wheel is raised.
FIG. 12 is an explanatory view (front view) of a caster 77 (rear wheel) with a lift mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hanging piece cutting device 3 Band saw blade drive unit 5 Main body frame 7 (a, b) Base frame 7
9 (a, b) Post 11 (f, r) Beam member 13 (f, r) Grip bar 15 Guide rail 17 Structure 19 Projection (hanging piece)
21 Opening 23 Saw Blade Housing 25 Reducer 27 Drive Motor 29 Drive Wheel 31 Drive Wheel 33 Band Saw Blade 35 Tension Adjusting Mechanism 37 (a, b) Chain 37
39 Linear motion bearing 41 First bearing box 43 (a, b) Follower sprocket 43
45 Drive motor 47 Drive sprocket 49 Connecting shaft 51 Clamp device 53a Left set plate 53b Right set plate 55 Clamp unit 56 Bolt 57 Spacer 59 Square groove 61 Rod stopper 63 Clamp arm 65 Flange 67 Clamping screw 69 Lock lever 71 Anvil 73 Fixed clamp unit 75 Fixed caster 77 Caster with lift mechanism 79 Foot pedal 81 Stand 85 NC device 87 Waterproof connector 89 Power cord 91 Cutting fluid tank 93 Pipe line

Claims (1)

A saw blade having a main body frame through which the protrusion can pass, and an opening through which the protrusion can pass in the suspension piece cutting device for cutting the protrusion integrally provided on the upper surface of the structure A band saw blade drive unit having a housing is provided so as to be horizontally movable with respect to the projection, and is provided so that a part of the band saw blade is exposed at a lower end portion of the opening of the band saw blade drive unit. Is provided so as to run horizontally near the base of the projection, and a clamp device for fixing the projection to the main body frame is provided, and the clamp device is provided on the left and right base frames below the main body frame. At least one bar-shaped stopper having a square cross section that can be freely engaged and disengaged in a square groove having a constant pitch opened upward in each of the pair of left and right set plates; A clamp arm that is fitted to the rod-shaped stopper and extends substantially perpendicular to the rod-shaped stopper, and a clamp unit that is provided at the tip of the clamp arm and includes a clamping screw that fixes the projection to the main body frame, After the front side of the projection is brought into contact with the rod-shaped stopper by a clamp device, the left side surface of the projection is brought into contact with the left set plate and fixed to the main body frame, and then the band saw blade drive unit is moved to the projection. A hanging piece cutting device characterized by horizontally moving with respect to an object to cut the vicinity of the base of the protrusion.

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