JP2761368B2 - Bar cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bar cutting device for cutting a metal bar such as a reinforcing bar used for reinforced concrete construction or a resin bar made of vinyl chloride resin or the like.

[0002]

2. Description of the Related Art For example, a steel pipe provided in a predetermined shape when reinforced concrete is constructed, and a resin pipe such as a vinyl chloride resin used for a water pipe or the like are provided in a fixed shape which is easy to handle in production or transportation. It is generally used after being cut to a required length at a construction site.

For example, when the length of reinforced concrete to be constructed is equal to or longer than the entire length of the reinforcing bar, the reinforcing bar is connected to the axial direction and used to extend to a required length. It is common that cutting is involved. Usually, since a plurality of reinforcing bars are arranged adjacent to each other, it is necessary to make the connecting positions different from each other in the longitudinal direction in order to secure the strength and reliability of the reinforced concrete. Further, such as gas pressure welding in which the end faces of the rebar are heated with gas while pressing the end faces with a predetermined force, and CB welding in which the end faces are held at a predetermined distance from each other, heated and a welding material is poured between the end faces. When the connection method is adopted, in order to ensure the strength and reliability of the connection portion, both end surfaces of the reinforcing bar to be connected must be perpendicular and flat to the axial direction thereof, and the oxide has been removed. Therefore, cutting is required.

[0004]

When cutting a bar material such as a reinforcing bar as described above, for example, as described in Japanese Utility Model Application No. Hei 6-13382 filed earlier by the present applicant. It has a bar gripper for gripping a bar and an outer peripheral blade, and is rotationally driven around a rotation axis parallel to the axis direction to cut the bar gripped by the bar gripper. And a cutting machine having a disk-shaped rotary cutting tool. Therefore, when the above-described bar cutting device is applied to cut a bar, such as a rebar, which has already been installed, the operation of gripping the bar with a bar gripper is required, and thus the operation is complicated. was there. Such a problem can occur not only in the case of cutting a resin pipe used in water works but also in the case of cutting a reinforcing bar, similarly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to cut a bar so that an end surface thereof can be accurately perpendicular to an axial direction without gripping a bar. Another object of the present invention is to provide a bar material cutting device having high workability.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a rotary member having an outer peripheral blade, and for cutting a bar, a rotary shaft parallel to the axial direction thereof is cut. longitudinal with a disc-shaped rotary cutting tool is rotated to one end
A bar cutting apparatus provided with Jo cutting machine, a pressing member having a contact capable of pressing the concave on the outer peripheral surface of the front Symbol bar (a),
(b) provided between the pressing member and the cutting machine, the cutting machine along the longitudinal direction so that the disk-shaped rotary cutting tool provided in the cutting machine approaches the bar and <br/> and a tool guide device for linearly guided along a plane perpendicular to the rotation axis direction of the disk-shaped rotary cutting tool, said cutting
The direction including the component of the guiding direction by the tool guiding device
By pressing the disk-shaped rotary cutting tool,
With the axis aligned parallel to the axis of the bar,
The pressing concave surface of the rod material is used to stabilize the position of the cutter.
It is to be brought into contact with the outer peripheral surface .

[0007]

Effects of the Invention] In this way, the bar cutting apparatus,
A pressing member having a pressing concave surface capable of contacting the outer peripheral surface of the bar, and between the pressing member and the cutting machine, a disk-shaped rotary cutting tool provided in the cutting machine approaches the bar. A tool guide device for guiding the cutting machine linearly along its longitudinal direction and along a plane perpendicular to the direction of the rotation axis of the disk-shaped rotary cutting tool. To
By pressing in the direction including
With the rotation axis parallel to the axis of the bar,
The pressing concave surface is on the outer peripheral surface of the rod so that the posture of the cutter is stable.
Ru are brought into contact. Therefore, when cutting the bar, the pressing concave surface of the pressing member is brought into contact with the outer peripheral surface of the bar with the pressing of the cutting machine in the guide direction , so that the axial direction of the bar is The disk-shaped rotary cutting tool is directed linearly in a direction approaching the bar in a state where the rotational axis direction of the rotary rotary cutting tool is parallel.

According to the above, when the bar is cut, the work for gripping the bar is not required, so that high workability can be obtained. In addition, the pressing concave surface of the pressing member is brought into contact with the outer peripheral surface of the bar to obtain a circular shape. Since the axis of rotation of the plate-shaped rotary cutting tool can be cut in a state parallel to the axis of the bar,
The bar can be cut so that the end face is perpendicular to the axial direction.
Moreover, the disk-shaped rotary cutting tool is linearly
Since it is guided, it cuts like a conventional bar cutting device
There is no need to secure the rotation angle of the machine.
It is also possible to cut rods such as installed reinforcing bars and resin pipes.
It becomes possible. By the way, the conventional bar cutting device is
A cutting machine equipped with a rolling cutting tool is
A predetermined pivot axis parallel to the axis of the bar for the machine
It is configured to make a cut by rotating it around
I was Therefore, when cutting a bar with a cutting machine,
The spacing between the bars, such as reinforcing bars, is sufficient for the turning angle of the cutting machine.
Must be large enough to secure
For cutting rods such as reinforcing bars that are relatively densely arranged
There was a problem that it could not be applied.

[0009]

In another preferred embodiment of the present invention, the tool guiding device preferably comprises: (c) rotating the disk-shaped rotary cutting tool by rotating the disk-shaped rotary cutting tool with the shaft center of the rod material; Center movement locus B
Than an extension of is intended to guide to be located <br/> front side in the rotation direction A of the disk-shaped rotary cutting tool, (d) pressing the concave surface of the pressing member, the said rod It has a pressing surface for pressing from the front side in the rotation direction A of the disk-shaped rotary cutting tool.

In this way, the bar is cut with its axis shifted forward in the rotation direction A with respect to the center of rotation of the disk-shaped rotary cutting tool. Therefore, when the outer peripheral blade of the disk-shaped rotary cutting tool is brought into contact with the bar at the time of cutting, a force is generated in a direction in which the disk-shaped rotary cutting tool approaches the bar side, and at the time of cutting, the disk is rotated. the Jo rotary cutting tool with subtracted force needed to guide according tool guide apparatus in a direction to approach the bar, the rotation of the front Symbol pressing concave bar is by the rotation force of the disk-shaped rotary cutting tool The pressing member faces the bar in order to keep the rotation axis direction of the disk-shaped rotary cutting tool parallel to the axis direction of the bar because the pressing surface is pressed by the pressing surface located on the front side in the direction A. Thus, the force required for pressing is reduced, and the cutting process can be performed more easily.

Preferably, (e) the pressing concave surface is a pair of first pressing planes which are parallel to a rotation axis of the disk-shaped rotary cutting tool and are adjacent to each other at a predetermined angle. It is composed of a second pressing plane. In other words, the pressing concave surface of the posture stabilizing member is composed of a pair of pressing planes which have an intersecting line extending in parallel with the axial direction of the disk-shaped rotary cutting tool and intersect with each other. With this configuration, when the pressing concave surface is pressed against the bar, the intersection of the pair of the first pressing plane and the second pressing plane (that is, the pair of pressing planes) constituting the pressing concave surface is the axis of the bar. Parallel to the direction. At this time, since the intersection line is parallel to the axial direction of the disk-shaped rotary cutting tool, the axial direction of the disk-shaped rotary cutting tool is parallel to the axial direction of the bar. .

Preferably, the pressing concave surface of the pressing member is formed of a semi-cylindrical surface having a generatrix extending parallel to the axial direction of the disk-shaped rotary cutting tool. Even in this case, when the pressing concave surface is pressed against the bar, the generatrix of the semi-cylindrical surface is made parallel to the axial direction of the bar, but the generatrix is oriented in the axial direction of the disk-shaped rotary cutting tool. Therefore, the axial direction of the disk-shaped rotary cutting tool is parallel to the axial direction of the bar.

Preferably, (f) the cutting machine has an elongated shape and has the disk-shaped rotary cutting tool at one end, and (g) the tool guide device includes a cutting machine. Is guided linearly along its longitudinal direction. With this configuration, since the disk-shaped rotary cutting tool is linearly guided toward the bar, it is not necessary to secure the turning angle of the cutting machine as in the conventional bar cutting device, It is also possible to cut rods such as reinforcing bars and resin pipes which are relatively densely arranged.

Incidentally, the conventional bar cutting apparatus uses a cutting machine equipped with a disk-shaped rotary cutting tool to move a cutting machine equipped with a disk-shaped rotary cutting tool to a bar holding machine fixed to the bar in a predetermined direction parallel to the axis of the bar. It is configured to perform cutting by turning around the turning axis of the. For this reason, when cutting a bar with a cutting machine, it is necessary that the interval between the bars such as reinforcing bars is made large enough to secure a sufficient rotation angle of the cutting machine, and the bars are relatively densely arranged. However, there is a problem that the method cannot be applied to the cutting of a bar material such as a reinforcing bar.

[0015] Preferably, the tool guiding device is
For example, (h) a longitudinal guide member fixed to the pressing member, and (i) a relative movement only in the longitudinal direction of the guide member by being provided in the cutter and engaged with the guide member. And a moving member to be moved.

Preferably, (j) the tool guide device includes a guide member fixed to the pressing member and moved relative to the cutting machine, and (k) the disc-shaped device. In order to change the relative angle between the plane perpendicular to the rotation axis direction of the rotary cutting tool and the axis direction of the bar, the pressing member and the guide member are relatively rotated by a predetermined angle around one axis. It further includes a relative rotating means for causing the rotation.

According to this structure, the tool guide device is configured to include the guide member fixed to the pressing member and relatively moved with respect to the cutting machine. Relative rotation means for relatively rotating the pressing member and the guide member by a predetermined angle around one axis in order to change the relative angle between the plane perpendicular to the rotation axis direction and the axis direction of the bar. It is comprised including. For this reason, the disk-shaped rotary cutting tool is guided toward the bar by the tool guide device in a state where a predetermined relative angle determined by the axial direction of the bar and the relative rotation angle is formed. You. Therefore, the bar is cut so that the cut end face forms a predetermined angle defined by the relative angle with the axial direction. Incidentally, for example, in CB welding, a gap formed between the cut end faces of a pair of rebars to be connected may be formed in a wedge shape. In such a case, in order to form the wedge-shaped gap, In addition, one of the rebars can be easily cut so that its end face forms a predetermined angle with respect to the axial direction.

Preferably, (l) the relative rotation means includes a rotation angle limiting means for positioning the relative angle at a vertical position and at a position at which the relative angle is the predetermined angle. Including. With this configuration, the relative angle between the plane parallel to the rotation axis of the disk-shaped rotary cutting tool and the axial direction of the bar is set to be two angles of vertical and a predetermined angle by the rotation angle limiting means. The relative rotation angle between the guide member and the pressing member can be set. Therefore, it becomes easy to cut the bar so that the cut end surface is perpendicular to the axial direction or forms a predetermined angle with the axial direction.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 5 are views showing the entirety of a bar cutting apparatus 10 according to an embodiment of the present invention, and are respectively a front view, a plan view, a bottom view, and a cross section taken along line IV-IV in FIG. Figure,
This corresponds to a sectional view taken along line VV in FIG. As shown in FIG. 1, the bar cutting apparatus 10 has a longitudinal cutting machine 18 for cutting a bar 12a or the like with a disk-shaped rotary cutting tool 16 incorporated at one end, and is integrated with the cutting machine 18. Is pressed by a bar 12a such as a reinforcing bar to be cut, so that the axis of the bar 12a and the axis of the disk-shaped rotary cutting tool 16 are parallel to each other. A pressing member 20 for stabilizing the posture of the material cutting device 10, and a later-described guide provided between the cutting machine 18 and the pressing member 20 for linearly guiding the cutting machine 18 to the bar 12a. And a tool guide device including a wall portion 146 and the like.

The pressing member 20 is fixed to one end of a longitudinal guide member 42 as shown in FIGS. The pressing member 20 extends in the axial direction of the bar 12a to form a V-shaped pair of first pressing flat surfaces 54a and a second pressing surface 54a.
A first pressing plane 54b.
“a” is provided along the longitudinal direction of the guide member 42. In addition, the pair of the first pressing plane 54a and the second pressing plane 54b extend in such a manner that their intersection line X extends in a direction perpendicular to the paper of FIG. 3, that is, in parallel with the axial direction of the disk-shaped rotary cutting tool 16. And the longitudinal direction is a disk-shaped rotary cutting tool 16
Are formed so as to be parallel to the axial direction of the. That is, the first pressing plane 54a and the second pressing plane 54b
They are provided parallel to the rotation axis of the disk-shaped rotary cutting tool 16 and adjacent to each other at a predetermined angle.

For this reason, the above-mentioned pressing member 20 is
a to make the intersection line X parallel to the axis of the bar 12a, the axial direction of the disk-shaped rotary cutting tool 16 is parallel to the axis of the bar 12a, ie, the disk The attitude of the bar cutting device 10 is maintained such that the rotating surface of the rotary cutting tool 16 is perpendicular to the axial direction of the bar 12a. In the present embodiment, the first pressing flat surface 54a and the second pressing flat surface 54b constitute a pressing concave surface 54 that can contact the outer peripheral surface of the bar 12a.

As shown in FIG. 4, the guide member 42 has a substantially rectangular cross section perpendicular to the longitudinal direction, and has one side (the lower side in FIG. 3) in the longitudinal direction.
By reducing the width from one surface opposite to the cutting machine 18 to a position approximately half in the thickness direction over the entire length in the longitudinal direction, a stepped portion 46 formed so as to protrude to the side surface.
Is provided. As shown in FIG. 5, the guide member 42 is provided with a bottomed hole 48 having a length extending from the other end surface opposite to the pressing member 20 to substantially the entire length in the longitudinal direction. A compression spring 50 is housed therein, and on one surface of the cutting machine 18, a length and a width are all sufficiently shorter than the bottomed hole 48, and a long hole 52 communicating with the bottomed hole 48 is provided. Is provided. In FIG. 4, the internal structure of the pressing member 20 and the motor 84 are not shown.

On the other hand, as shown in FIGS. 1 to 3, the cutting machine 18 has a power supply cord 80 and a switch 82, and also serves as a grip portion, and is attached to the motor 84 to drive the motor 84. And a housing 86 made of, for example, a light alloy (for example, an aluminum alloy or an aluminum die-cast) for accommodating the disk-shaped rotary cutting tool 16 rotated by the above. As shown in FIG. 2, the outer peripheral blade of the disk-shaped rotary cutting tool 16 is formed of a tip made of, for example, a cemented carbide, which is fixed to the rear side in the rotation direction at a predetermined interval.

FIGS. 1 and 3 show the housing 86.
As shown in FIG. 8, a cover 88 formed of the same light alloy as the housing 86 and covering the disk-shaped rotary cutting tool 16 on one surface of the guide member 42 has two screws 90 and 9.
0 and as shown in FIGS. 1 and 2
As shown in FIG. 7, a bearing case 92 is mounted on one surface opposite to the cover 88 by four bolts 94. As shown in FIG. 2, the housing 86 and the cover 88 are each provided with a U-shaped notch 98 in a part of the bar 12 a pressed by the pressing member 20. 16 is partially exposed. The knob 9 provided on the housing 86
Numeral 6 is operated to stop the rotation when exchanging the disk-shaped rotary cutting tool 16 or the like.

The inside of the housing 86 has the structure shown in the sectional view of FIG. Output shaft 1 of motor 84
02, a helical gear 104 is attached. The helical gear 104 is a helical gear 1 attached to one end of a transmission shaft 106 provided in parallel with the output shaft 102.
08. The transmission shaft 106 is supported by a total of three bearings 110 inserted into the shaft portion, one at the one end and the other at the other end, and has a bevel gear at the other end. .

In front of the bevel gear of the transmission shaft 106,
A rotating shaft 114 supported by a pair of bearings 112, 112 is provided perpendicular to the transmission shaft 106, and a bevel gear 116 meshed with the bevel gear of the transmission shaft 106 is mounted on the shaft portion. Have been. On the outer peripheral surface of the bevel gear 116, there are provided about two to four bottomed holes 118 extending in the axial direction of the rotating shaft 114. The bottomed hole 118 is fitted with a rotation stop pin 122 fixed to the knob 96, and the rotation stop pin 122 is provided with a spring 124 provided between the housing 86 and the knob 96. It is always located apart from the outer peripheral surface of the bevel gear 116 by the force.

A cylindrical cutter flange 126 having a large diameter portion is fitted and attached to the tip of the rotary shaft 114 to a position where it contacts the bearing 112 located on the upper side in FIG. Cutter flange 1
The disk-shaped rotary cutting tool 16 is attached to one surface of the plate 26 opposite to the upper bearing 112 by being clamped by a disk-shaped flange 128 having a through hole in the center. The screw is screwed to the rotating shaft 114. The cutter flange 12
6, one pin 132 is press-fitted, and the one pin 1 is inserted into the disc-shaped rotary cutting tool 16 and the flange 128.
By inserting the pin 132 into the through hole provided corresponding to the hole 32, the relative rotation between the disk-shaped rotary cutting tool 16 and the cutter flange 126 is prevented.

The three bearings 110 fitted to the transmission shaft 106 are fixed by cylindrical spacers 134 and 136, a collar 138, and a flat bar 142 which is fastened and fixed by a bolt 140 to fix the collar 138. The spacing and position of each other is kept constant.
The rotation of the rotary shaft 114, the cutter flange 126, the bevel gear 116, and the transmission shaft 106 and the helical gear 108 are prevented from rotating relative to each other by keys (not shown).

As shown in FIGS. 1 and 4, the cover 88 has a surface facing the motor 84 from the center thereof and facing the guide member 42.
4 (the stepped portion 4 on the left side in FIG. 4).
A pair of guide walls 144 and 146 extending toward the posture stabilizing member 14 are provided so as to cover 6). Each of the pair of guide walls 144 and 146 has the same height as the opposing side surface of the guide member 42, that is, the stepped portion 4.
The one guide wall portion 144 located on the sixth side has a relatively low height such that the upper end thereof is substantially the same as the upper end of the stepped portion 46 of the guide member 42 on the opposite side to the housing 86, and the other guide wall portion 144 has The guide wall 146 is formed relatively high so that the upper end thereof is located substantially at the same position as the upper end of the guide member 42 in the thickness direction.

As shown in the plan view of FIG. 3 and the cross-sectional view of FIG.
A pair of back plates 148 and 150 similar to 46 are fixed by a plurality of bolts 152, respectively. One back plate 148 fixed to the guide wall 144 has a width slightly larger than the width of the upper end surface of the guide wall 144 so that it protrudes from the upper end to the guide wall 146 side. Attached, and the other back plate 150 is also
It is attached so as to protrude from the guide wall portion 146 toward the guide wall portion 144 by the same width direction size as the back plate 148.

That is, the guide walls 144 and 146 and the back plates 148 and 150 are provided so as to be in close contact with the outer peripheral surface of the guide member 42, so that the guide wall 144 and the like and the guide member 42 Are fitted so as to be relatively movable in the longitudinal direction and relatively immovable in the direction perpendicular to the longitudinal direction. For this reason, the cutting machine 18, that is, the disk-shaped rotary cutting tool 16, is moved only in the longitudinal direction of the guide member 42, that is, in a direction that linearly approaches or separates the bar 12 a pressed by the pressing member 20 (ie, the cutting machine 18).
(Along the longitudinal direction of the rod member 12), the guide member 42 is relatively movable, and the pressing concave surface 54 of the pressing member 20 is brought into contact with the outer peripheral surface of the rod 12a, whereby the disk-shaped rotation is performed. The posture of the cutting machine 18 is stabilized in a state where the rotation axis of the cutting tool 16 is parallel to the axial direction of the bar 12a. In this embodiment, the guide wall 144,
146 and the back plates 148 and 150 constitute a moving member, and the tool guide device constituted by the moving member and the guide member 42 is a pressing member 20 and a cutting machine 18.
The tool guiding device and the pressing member 20 constitute an attitude stabilizing device for stabilizing the attitude of the cutting machine 18 as described above.

As described above, the compression spring 50 is provided in the bottomed hole 48 of the guide member 42. The end faces of the guide walls 144 and 146 on the motor 84 side are provided with the compression spring 50 as shown in FIG. As shown in FIG. 5 and FIG.
56 is attached by two bolts 158, 158 and its end is closed, and the guide wall portion 144,
A pin nut 160 located between 146 is fixed to the end plate 156 by a bolt 162. The compression spring 50 is pressed toward the pressing member 20 by the end plate 156 in a state where the end on the motor 84 side is fitted to the pin-shaped nut 160. Therefore, the cutting machine 18 is constantly urged in a direction away from the bar 12a pressed by the pressing member 20.

The pin 164 erected from the cover 88 toward the guide member 42 is to be engaged with the elongated hole 52 provided in the guide member 42.
Thereby, relative movement between the cutting machine 18 and the pressing member 20 is limited to a range in which the pin 164 abuts on both ends in the longitudinal direction of the elongated hole 52, and unnecessary relative movement is prevented. In addition, the U-shaped notch 98 is a distance from the surface of the pressed bar 12a on the disk-shaped rotary cutting tool 16 side to the bottom of the U-shape more than the moving amount of the cutting machine 18. Is formed to be slightly larger,
Housing 86, cover 88 and bar 12a during cutting
The interference with is prevented.

As shown in FIG. 5, the housing 86 and the cover 88 are provided on the outer peripheral side of the disk-shaped rotary cutting tool 16 with side walls 178, 181 protruding in opposite directions. By making the tips of the 180 abut against each other, a substantially closed space is formed in the housing 86. This side wall portion 178, 1
80 is provided along the outer peripheral surface of the disk-shaped rotary cutting tool 16 in most parts including the pressing member 20 side where the U-shaped notch 98 is provided.
8 and 180 have a minimum necessary size that does not interfere with the outer peripheral surface of the disk-shaped rotary cutting tool 16. Although not shown, in the U-shaped notch 98, the cover 8
The side wall portion 180 on the eighth side has the same side wall height as the other portions. However, the side wall portion 178 of the housing 86 has a lower side wall height by a predetermined amount (for example, about 3 mm) than the other portions. The side wall portion 178 and the disk-shaped rotary cutting tool 1
6 is prevented.

A chip discharge port 182 projecting to the outer peripheral side is formed in the lowermost portion of the side wall portions 178 and 180 of the housing 86 and the cover 88 in FIG. Neither side wall portions 178, 180 are provided on the distal end surface 184 of the chip discharge port 182,
Chips generated when cutting the bar 12 a with the disk-shaped rotary cutting tool 16 are discharged from the front end surface 184. As shown in FIG. 3, the chip storage bag 18
6 is attached, and the chips generated by the cutting operation are collected. The chip storage bag 186 is configured to have a capacity of, for example, about 1000 cm ³ (about 600 g as a chip weight) by, for example, heat-resistant fibers having air permeability. Powder temperature (for example, when cutting iron material
200 ℃). The chips stored in the chip storage bag 186 are processed by opening a fastener (not shown) provided in a part thereof.

The bar cutting apparatus 10 constructed as described above
The operation of cutting the bar 12a or the like such as a reinforcing bar constructed so that the axis is in the vertical direction by using is described below. The bar 12a such as a reinforcing bar is cut for the purpose of obtaining a clean end face suitable for gas pressure welding when connecting another bar such as a reinforcing bar (not shown) in the vertical direction, or as shown in FIG. Bars 12b, which are constructed adjacent to each other as shown in FIG.
This is performed for the purpose of making the axial length equal to 12c or the like.

First, the first pressing plane 54a of the pressing member 20
2 is inserted between the bar 12a to be cut and the adjacent bar 12c shown in FIG. 2, and the first pressing plane 54a and the second pressing plane 54b (that is, the pressing concave surface) Presses the cutting machine 18 in, for example, its longitudinal direction, that is, the direction along the straight line B in FIG. Thereby, the cutting machine 18 is configured such that the pressing concave surface 54 of the pressing member 20 abuts on the outer peripheral surface of the bar 12a, and the intersection X of the pair of the first pressing plane 54a and the second pressing plane 54b.
Is held parallel to the axial direction of the bar 12, and the axial directions of the disk-shaped rotary cutting tool 16 and the bar 12 a are parallel to each other. As described above, the end plate 15 fixed to the guide member 42 and the guide walls 144 and 146 is provided.
6 is provided with a compression spring 50,
The guide member 42 is pressed against the bar 12a by the restoring force of the compression spring 50 even when the cutting machine 18 is movable toward the bar 12a.

As described above, in a state where the pressing member 20 is pressed against the bar 12a and the posture of the bar cutting device 10 is stabilized,
By operating the switch 82, the disk-shaped rotary cutting tool 16 is
When the cutting machine 18 is turned to the bar 12a after being rotated in the direction of the arrow A shown in FIG. 5, since the pressing member 20 fixed to one end of the guide member 42 is already pressed by the bar 12a, The guide member 42 and the guide wall 146 and the like are relatively moved, and the relative movement between the pressing member 20 and the cutting machine 18 is performed. At this time, as described above, the relative movement direction of the guide member 42 and the cutting machine 18 is limited to the direction in which the guide member 42 linearly approaches or separates from the bar member 12a. Since the rod 12a is pressed against the material 12a to make the axis direction thereof parallel to the intersection line X, the relative movement with the bar 12a is made immovable. The cutting is started in a straight line with the bar 12a.

Then, the cutting machine 18 is connected to the elongated hole 52 provided in the guide member 42 by the pin 164 erected on the cover 88.
Until it comes into contact with the end on the pressing member 20 side.
When the bar 12a is moved against the urging force of the compression spring 50 provided in the bar 8, the bar 12a is relatively moved to the position 12a 'in FIG. At this time, the adjacent bar 12
Since b and c also move relative to each other as shown by the arrow in FIG. 2 similarly to the bar 12a, as shown in the figure,
The width C of the housing 86 and the cover 88 in a direction perpendicular to the moving direction of the cutting machine 18 (that is, the longitudinal direction of the cutting machine 18) at the portion passing through the bottom of the U-shaped notch 98 is the same as the width of the bar 12b. , 12c can be cut by the bar cutting device 10 when mutual interference does not occur. As is apparent from FIG. 1 and the like, the pressing member 20 is positioned such that the upper end surface thereof is slightly separated from the lower surface of the housing cover 88 in the axial direction of the rod 12a, and thereby, the cutting machine Mutual interference is prevented when cutting 18 is advanced. At the time of the above-mentioned cutting, the axis O of the bar 12a is moved in the rotation direction A more than the trajectory B of the rotation center of the disk-shaped rotary cutting tool 16.
Is located on the front side.

After the cutting is completed as described above, when the cutter 18 is retracted according to the restoring force of the compression spring 50, the pressing force of the pressing member 20 on the bar 12a is gradually reduced. When the retraction of the cutting machine 18 is completed by being brought into contact with the end of the cutting machine 18 on the motor 84 side of the pressing member 20, the pressing member 20 is separated from the bar 12a. Then, the switch 82 is operated again to stop the rotation of the disk-shaped rotary cutting tool 16, thereby completing a series of cutting operations.

Here, in the present embodiment, the bar cutting device 10 is provided with the cutting machine 10 in a state where the rotation axis of the disk-shaped rotary cutting tool 16 is parallel to the axial direction of the bar 12a. In order to stabilize the posture, the pressing is provided with a pressing concave surface 54 which has a similar shape in a cross section perpendicular to the rotation axis direction of the disk-shaped rotary cutting tool 16 and can contact the outer peripheral surface of the bar 12a. Between the member 20 and the pressing member 20 and the cutting machine 18, the disk-shaped rotary cutting tool 1 provided in the cutting machine 18.
A guide member 42, a guide wall portion 144, and a guide member 42 for guiding the cutting machine 18 along a plane perpendicular to the direction of the rotation axis of the disk-shaped rotary cutting tool 16 so that the bar 6 approaches the bar 12a.
146 and a backing plate 148, 150. That is, the bar cutting device 10
Is provided with a pressing concave surface 54 having a longitudinal direction parallel to the axial direction of the disk-shaped rotary cutting tool 16, and by pressing the bar 12 a with the pressing concave surface 54, the pressing concave surface 54 is Cutting machine 1 in a state where its longitudinal direction is made parallel to the axial direction of the bar 12a so as to follow the outer peripheral surface of
8 is provided with a pressing member 20 for stabilizing the posture, and a tool guide device for guiding the disk-shaped rotary cutting tool 16 toward the bar 12a.

Therefore, when cutting the bar 12a, the pressing concave surface 54 of the pressing member 20 is brought into contact with the outer peripheral surface of the bar 12a, so that the axial direction of the bar 12a and the disk-shaped rotary cutting are performed. With the rotation axis of the tool 16 being parallel, the disk-shaped rotary cutting tool 16 is
2a.

As described above, when the bar 12a is cut, the work for gripping the bar 12a is not required, so that high workability can be obtained, and the pressing concave surface 54 of the pressing member 20 contacts the outer peripheral surface of the bar 12a. By making contact, the rotation axis direction of the disk-shaped rotary cutting tool 16 can be cut in a state parallel to the axis direction of the bar 12a, so that the bar material is cut so that the cut end face is perpendicular to the axis direction. 12a can be cut. In addition, since the bar 12a is not required to be gripped, all operations can be performed with the bar material cutting device 10 held by one hand, so that the bar 12a can be supported by the other hand. High workability can be obtained.

In the present embodiment, the tool guide device is provided with the disk-shaped rotary cutting tool 16 and the bar 12a having the axial center.
The pressing member 2 guides the disk-shaped rotary cutting tool 16 so as to be located on the front side in the rotation direction of the disk-shaped rotary cutting tool 16 with respect to an extension of the movement locus B of the rotation center of the disk-shaped rotary cutting tool 16.
The zero pressing concave surface 54 has one surface (first pressing flat surface 54a) that presses the bar 12a from the front side in the rotation direction of the disk-shaped rotary cutting tool 16.

As described above, the rod 12a has its axis O in the rotation direction A with respect to the rotation center of the disc-shaped rotary cutting tool 16.
It is cut in a state shifted to the front side of. Therefore, at the time of cutting, the outer peripheral blade of the disk-shaped rotary cutting tool 16 is
, A force is generated in a direction in which the disk-shaped rotary cutting tool 16 approaches the bar 12a side, and the disk-shaped rotary cutting tool 16 is moved in a direction approaching the bar 12a during cutting. The force required for guiding according to the guide device is reduced, and the rod 12a is moved by the rotational force of the disk-shaped rotary cutting tool 16 into the first pressing plane 54a on the front side in the rotation direction, that is, the rotation direction of the pressing concave surface 54. Since the pressing member 20 is pressed, it is necessary to press the pressing member 20 toward the bar 12a in order to keep the rotation axis direction of the disk-shaped rotary cutting tool 16 parallel to the axis direction of the bar 12a. The force is reduced and the cutting process can be performed more easily.

According to the present embodiment, the pressing concave surface 5
Reference numeral 4 denotes a pair of a first pressing plane 54a and a second pressing plane 54b which are parallel to the rotation axis of the disk-shaped rotary cutting tool 16 and are adjacent to each other at a predetermined angle. That is, the pressing concave surface 54 of the pressing member 20
Is a pair of pressing planes 54 that intersect with each other with an intersecting line X extending parallel to the axial direction of the disc-shaped rotary cutting tool 16.
a, 54b. Therefore, when the pressing concave surface 54 is pressed against the bar 12a, a pair of the first pressing flat surface 54a and the second pressing flat surface 54b constituting the pressing concave surface 54 is formed.
The intersection line X of the (that is, the pair of pressing planes) is made parallel to the axial direction of the bar 12a. At this time, since the line of intersection X is parallel to the axial direction of the disk-shaped rotary cutting tool 16, the axial direction of the disk-shaped rotary cutting tool 16 is
This is made parallel to the axial direction of a.

According to the present embodiment, the cutting machine 18
The disk-shaped rotary cutting tool 16 has an elongated shape and has the disk-shaped rotary cutting tool 16 at one end. The tool guide device linearly guides the cutting machine 18 along the longitudinal direction. For this reason, since the disk-shaped rotary cutting tool 16 is linearly guided toward the bar 12a, it is not necessary to secure the turning angle of the cutting machine as in the conventional bar cutting device. It is also possible to cut rods 12a such as steel bars and resin pipes that are closely arranged.

In this embodiment, the U-shaped notch 98 has a side wall 180 on the cover 88 side having the same side wall height as other parts, and the side wall 178 of the housing 86 has another side. Since the height of the side wall is slightly lower than that of the notched portion 98, the disk-shaped rotary cutting tool 16 is exposed. Only a minimum necessary gap is provided to prevent interference with the tool 16. Therefore, the side wall portion 178 formed in the notch 98 on the housing 86 side functions as a cut piece stopper for preventing a cut piece generated by cutting the bar 12a from entering the housing 86. Therefore,
Even when the cut piece has a relatively thin coin shape, entry into the housing 86 is suitably suppressed, and even when the bar 12a is a metal bar such as a reinforcing bar, the disk-shaped rotary cutting tool is used. The breakage of the 16 outer peripheral blades can be suitably suppressed.

Further, a chip discharge port 182 is provided on the side surface of the housing 86 and the cover 88, and a chip storage bag 186 is provided in the chip discharge port 182, so that chips generated by the cutting process are formed. Is collected, and burns and dust inhalation of workers due to high temperature chips are suitably suppressed, and work safety is improved.

The disk-shaped rotary cutting tool 1 of the cutting machine 18
Since 6 is rotated in a plane perpendicular to the axis of the bar 12a, it is possible to cut the bar 12a so that its cut end face is perpendicular and flat in the axial direction. Therefore, when another bar is connected to the bar 12a by welding or the like, a clean end face suitable for welding is obtained.

A compression spring 50 is provided in the bottomed hole 48 of the guide member 42, and the cutting machine 18 is urged against the pressing member 20 in a direction away from the bar 12a. The pressing member 20 is pressed toward the bar 12a only by moving the cutting machine 18 toward the bar 12a, so that the cutting operation is further facilitated. Thus, the rod 12a can be cut slowly, and the disk-shaped rotary cutting tool 16 is more reliably prevented from being damaged.

Next, another embodiment of the present invention will be described. In the following description, portions common to the above-described embodiment will be denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 6 is a diagram showing a bar cutting device 190 in which the pressing member and the tool guide device are provided not only on the cover 88 side but also on the housing 86 side. In the drawing, a bearing case 92 is provided with the guide wall portion 14.
A pair of guide walls 188, 188 (only one is shown) similar to those of US Pat. No. 4,146 and 146 are fixed, and on the upper surface of the guide wall 188, back plates 148, 150 (only 150 is shown) are provided. In the same manner as described above, it is attached by a plurality of bolts 152 (not shown). And those guide wall portions 18
8, 188 and the back member 148, 150, the moving member is provided with a pressing member 194 at one end similar to the above-described embodiment.
Is fixed at the other end,
It is fitted so as to be relatively movable in a direction approaching the bar 12a.

In this embodiment, when cutting the bar 12a or the like, the pair of pressing members 20 and 194 are respectively moved at positions on both axial sides of the cutting position e in the drawing.
2a so that the axial direction of the disk-shaped rotary cutting tool 16 is parallel to the axial direction of the bar 12a.
The posture of the bar cutting device 190 is stabilized. Thereafter, the bar 12a is cut by moving the cutting machine 18 toward the bar 12a in the same manner as in the above-described embodiment. In this embodiment, at the beginning of cutting, the rod 1
2a is pressed by the pressing members 20 and 194 at two places separated in the axial direction, so that the posture of the bar cutting device 10 is further stabilized, and the cut end face of the bar 12a is more reliably held on the shaft. It can be perpendicular to the direction of the center.

After the cutting has progressed to some extent,
One end (for example, the upper end in the figure) of the bar 12a to be cut and removed hardly applies a reaction force to the pressing member 194, and thereafter, the bar 12a is only used by the one pressing member 20. The posture of the cutting device 10 is maintained. Therefore, 2
In spite of pressing the bar 12a at some places, the length of the pressing member 20 in the axial direction of the bar 12a is relatively long as in the above-described embodiment.

FIG. 7 is a diagram showing still another embodiment of the present invention, and corresponds to FIG. 3 of the above-described embodiment. In the figure, the pressing member 200 includes a pressing surface 202a parallel to the longitudinal direction of the guide member 42 and a pressing surface 202b perpendicular to the pressing surface 202a. The line of intersection X 'of the pair of pressing surfaces 202a and 202b is perpendicular to the paper surface, that is, parallel to the axial direction of the disk-shaped rotary cutting tool 16.

When cutting the bar 12a using the bar cutting device 204 having the pressing surface 202 as described above, for example, the cutting machine 18 is pressed in the direction of arrow F in the figure. Thereby, the pair of pressing surfaces 202 of the pressing member 200
a and 202b are pressed by the bar 12a so that the intersection line X 'is parallel to the axial direction of the bar 12a. Accordingly, the axial direction of the disk-shaped rotary cutting tool 16 is parallel to the axial direction of the bar 12a, and the cut end face of the bar 12a is perpendicular to the axial direction. As is clear from the above description, the pressing direction of the cutting machine 18, that is, the pressing direction of the pressing member 200,
The guide direction may not necessarily coincide with the guide direction as long as the force in the pressing direction is pressed so as to include the component in the guiding direction.

FIGS. 8 and 9 are views showing a bar cutting device 207 in which the structures of the pressing member and the guide member are different from those of the above-described embodiment, and correspond to FIGS. 1 and 3, respectively. FIG. In FIG. 8, the guide member 208
Has a longitudinal shape and is fitted to the guide wall portion 144 and the like at one end thereof like the guide member 42 so as to be relatively movable in the longitudinal direction, that is, is fitted to the cutting machine 18 so as to be relatively movable in the longitudinal direction. A pressing member 212 is rotatably attached to the other end of the guide member 208 by a bolt 210.

The other end of the guide member 208 has a disk-shaped rotary cutting tool 16 perpendicular to the longitudinal direction of the guide member 208.
Is provided with a female screw hole 214 parallel to a plane G perpendicular to the rotation axis. On the other hand, as shown in FIG. 9, the pressing member 212 has a flat mounting portion 216 that has a substantially T-shaped cross section perpendicular to the longitudinal direction and protrudes toward the guide member 208. The portion 216 is formed with a through hole 218 that penetrates in the thickness direction (that is, the direction perpendicular to the longitudinal direction of the pressing member 212). This pressing member 212
The bolt 210 is attached to the guide member 208 by being screwed into the female screw hole 214 with the bolt 210 passed through the through hole 218. Accordingly, the pressing member 212 is rotated about one axis perpendicular to the longitudinal direction of the guide member 208 and parallel to the plane perpendicular to the rotation axis of the disk-shaped rotary cutting tool 16 (that is, perpendicular to the paper surface in FIG. 8). It is possible to move. In the present embodiment, the bolt 210, the female screw hole 214, the mounting portion 216, and the through hole 218 constitute a relative rotation unit.

Further, as shown in FIG.
12 has a pair of first members on the opposite side to the guide member 208.
A pressing concave surface 54 composed of a pressing flat surface 54a and a second pressing flat surface 54b is provided. One of a pair of pressing planes constituting the pressing concave surface 54, one of the first pressing planes 54a
The guide member 2 is arranged so as to be parallel to the rotation axis of the disc-shaped rotary cutting tool 16 regardless of the rotation angle of the pressing member 212.
08 along the longitudinal direction, but the other second
The pressing plane 54b forms a predetermined angle with the first pressing plane 54a, and forms a predetermined angle with respect to the rotation axis of the disk-shaped rotary cutting tool 16 according to the rotation angle of the pressing member 212. Is provided.

The guide member 208 side of the pressing member 212
As shown in FIG.
A vertical surface 220a parallel to the rotation axis of the cutting tool 16;
It is provided following the vertical surface 220a and is parallel to its rotation axis.
Straight line and predetermined angle θ₁And the length of the guide member 208
It is composed of an inclined surface 220b parallel to a straight line perpendicular to the hand direction.
Have been. On the other hand, the second pressing plane 54 of the pressing member 212
b, a flat pair facing the front end surface 220
A facing surface 222 is provided. For this reason, the pressing member 21
The rotation angle of 2 is a rod member whose pressing member 212 is pressed.
The axis of 12a is the axis of rotation of the disk-shaped rotary cutting tool 16.
The angle θ formed with the plane G perpendicular to the direction is shown in FIG.
The vertical surface 220a and the opposing surface 222
Angle θ _TwoAnd the inclined surface as shown in FIG.
220b and the angle θ at which the opposing surface 222 is brought into contact.₁When
Is limited to be positioned at the same position. You
That is, in the present embodiment, the vertical surface 220a,
The inclined surface 220b and the opposing surface 222 serve as rotation angle limiting means.
Is equivalent to

FIG. 9 shows a state in which the angle θ is the angle θ ₂ shown in FIG. Further, in the present embodiment, the vertical surface 2 forming a part of the tip end surface 220
Since 20a is parallel to the rotation axis of the disk-shaped rotary cutting tool 16, the theta ₂ is, for example, a right angle (90 °), whereas the inclination angle of the inclined surface 220b, i.e. the plane G in Fig. 8 the bars 12a angle theta ₁ formed by the axial direction of being a, for example, about 65 to 75 °.

The bar cutting device 20 constructed as described above
7, the cutting machine 18 is moved in the longitudinal direction or the axial direction of the bar 12a in a state where the pressing concave surface 54 is in contact with the bar 12a, similarly to the bar cutting device 10 shown in FIG. By pressing the bar 12a along the direction indicated by the arrow F in FIG. 8, the bar 12a can be cut. At this time, the cut end surface of the bar 12a forms an angle with respect to the axial direction according to the rotation angle of the pressing member 212. For example, when the pressing member 212 cuts the bar 12a at the rotation angle shown in FIG. 8, the cut end surface is 15 to 15 with respect to a cross section perpendicular to the axial direction of the bar 12a.
An angle of about 25 ° is formed. On the other hand, when cutting is performed in a state where it is positioned at the rotation angle shown in FIG. 10, similar to the case where the bar material cutting device 10 or the like shown in FIG. 1 or the like is used. Then, the cut end face is perpendicular to the axial direction.

As described above, in the present embodiment, the tool guide device is configured to include the guide member 208 fixed to the pressing member 212 and relatively moved with respect to the cutting machine 18, and the bar cutting device. 207 is a pressing member 212 for changing the relative angle θ between the plane G perpendicular to the rotation axis direction of the disk-shaped rotary cutting tool 16 and the axis direction of the bar 12a.
Further, a relative rotation means including a bolt 210, a female screw hole 214, a mounting portion 216, and a through hole 218 for relatively rotating the guide member 208 and the guide member 208 about a single axis by a predetermined angle is further included. For this reason, the disk-shaped rotary cutting tool 1
6 is guided by the tool guide device toward the bar 12a in a state where the bar 6 forms a predetermined relative angle θ determined by the axial direction of the bar 12a and the relative rotation angle θ.
Therefore, the bar 12a is cut so that the cut end face forms a predetermined angle (90 ° -θ) with the axial direction thereof, and is required, for example, when welding a pair of rebars by CB welding or the like. The end face inclined at a predetermined angle in the axial direction, which may sometimes occur, can be easily formed.

Further, according to the present embodiment, the relative rotation member is positioned between a position where the relative angle θ is vertical (θ ₂ ) and a position where the relative angle is a predetermined tilt angle (θ ₁ ). The tip surface 220 (ie, the vertical surface 220a
And a rotation angle limiting means constituted by the inclined surface 220b) and the opposed surface 222. for that reason,
The relative angle θ between the plane G parallel to the rotation axis of the disk-shaped rotary cutting tool 16 and the axial direction of the bar 12a is _two angles of vertical (θ ₂ ) and a predetermined inclination angle (θ ₁ ). Thus, the relative rotation angle θ between the guide member 208 and the pressing member 212 can be set. Therefore, it is easy to cut the bar 12a such that the cut end face is perpendicular to the axial direction or forms a predetermined inclination angle with the axial direction.

While the embodiment of the present invention has been described in detail with reference to the drawings, the present invention can be embodied in still another embodiment.

For example, in the above-described embodiment, the moving member composed of the guide walls 144, 146, and the back plates 148, 150 is closely arranged on the outer peripheral surfaces of the guide members 42, 208, so that the tool guide is provided. Although the apparatus is configured so that the relative movement direction between the moving member and the guide members 42 and 208 is only in the longitudinal direction of the guide member 42,
On the contrary, the moving member provided in the cutting machine 18 is inserted into the guide members 42 and 208 so as to be relatively movable in the longitudinal direction and immovable in the direction perpendicular to the longitudinal direction, so that the tool guide is provided. The device may be configured. Also,
The tool guide device does not necessarily have to have the longitudinal guide members 42 and 208. For example, the guide member is formed of a rolling member or a rolling bearing provided at several places in the longitudinal direction of the cutting machine 18, and the cutting member is cut. The machine 18 may be provided with a moving member to be engaged with the rolling member or the like.

[0069]

In the embodiment, the pressing members 20 and
Although the pressing concave surface 54 of 212 is formed so as to form a V-shape, the shape is appropriately changed. For example, it may be polygonal or semi-cylindrical. When it is possible to fit the bar 12a to be cut from one end, the bar 12a may have a cylindrical shape. When these shapes are used, it is necessary that the generatrix be parallel to the axis of the disk-shaped rotary cutting tool 16.

Further, in the embodiment, a pair of longitudinally extending portions extending along the rotation axis direction of the disk-shaped rotary cutting tool 16, that is, along the axis direction of the rod 12a or forming a predetermined angle θ with the rotation axis direction. First pressing plane 54a, second pressing plane 54
b, the pressing member 20 having the pressing concave surface 54 composed of
Although 212 was used, the pressing concave surface 54 does not necessarily have to be formed in a longitudinal shape. For example, a bar 12
The pressing concave surface 54 may be constituted by two pressing concave surfaces separated from each other by a predetermined distance in the axial direction of a. That is, the pressing concave surface 54 is a disk-shaped rotary cutting tool 1 as a whole.
6 has a sufficient length to stabilize the posture of the cutting machine 18 so that the axis direction is parallel to the axis direction of the bar 12a or forms a predetermined angle θ, and is divided into two or more. It may be done.

Further, in the embodiment, the axis of the bar 12a is configured to be located forward of the trajectory of the rotation center of the disk-shaped rotary cutting tool 16 in the rotation direction. It may be configured to be located on the locus or on the rear side in the rotation direction with respect to the locus. However, if the axial center of the bar 12a is located on the front side in the rotation direction as in the embodiment, the force and cutting resistance required to press the pressing member 20 and the like against the bar 12a are reduced. preferable.

In the embodiment shown in FIGS. 8 to 10, the pressing member 212 has a plane G perpendicular to the longitudinal direction of the guide member 208 and perpendicular to the rotational axis of the disk-shaped rotary cutting tool 16. Although provided so as to be rotatable about a parallel rotation axis, for example, even when provided so as to be rotatable about a rotation axis parallel to the longitudinal direction of the guide member 208, the rotation angle is By setting the desired angle, the bar 12a can be cut so that its end face forms a desired angle in the axial direction. However, in such a case, the pressing member is set so that the relative position between the locus B of the rotation axis of the disk-shaped rotary cutting tool 16 and the axis O of the bar 12a at the cutting position is appropriately maintained. Rotate 212, or
It is necessary to adjust the guide direction by the tool guide device.

In the embodiment shown in FIGS. 8 to 10, the vertical surface 220a and the inclined surface 220 constituting the rotation angle limiting means for limiting the rotation angle of the pressing member 212.
b, and the disk-shaped rotary cutting tool 1
Although the vertical surface 220a for making the rotation axis of the rod 6 and the rotation axis of the rod 12a parallel is relatively short, in order to restrict the rotation angle so that the parallel state can be obtained with higher accuracy. For example, it is desirable that the vertical surface 220a be extended toward the cover 88 and the length be sufficiently long.

In the embodiments shown in FIGS. 8 to 10, if it is not necessary to set the turning angle of the pressing member 212 particularly strictly, the turning angle limiting means may not necessarily be provided.

In the embodiment, the switch 82 for rotating the disk-shaped rotary cutting tool 16 is provided, and the switch 82 is operated when the cutting machine 18 is moved toward the bar 12a. However, for example, an interlocking switch that starts the rotation of the disk-shaped rotary cutting tool 16 in conjunction with the moving operation before the cutting machine 18 contacts the bar 12a may be provided.

In the embodiment, the bar cutting device 1
0 and the like, a power cord 80 is provided, and the motor 84, that is, the disk-shaped rotary cutting tool 16 is configured to be rotated by a power source to which the power cord 80 is connected. A storage battery may be provided to be used in a rechargeable manner.

Further, in the embodiment, the case of cutting the metal bar 12a such as a reinforcing bar has been described. However, the bar cutting device 10 and the like may be, for example, a resin (for example, a vinyl chloride resin or the like) used for a water pipe. The present invention can be similarly used for cutting a bar or a pipe made of another material such as a pipe.

In the above description of the cutting operation,
Although the bar 12a is constructed and erected, the bar cutting device 10 and the like can be used for cutting the bar 12 that has not been constructed yet.

Although not specifically exemplified, the present invention can be variously modified without departing from the gist thereof.

[Brief description of the drawings]

FIG. 1 is a front view showing a bar cutting device according to one embodiment of the present invention.

FIG. 2 is a plan view of the bar cutting device of FIG. 1;

FIG. 3 is a bottom view of the bar cutting device of FIG. 1;

FIG. 4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a sectional view taken along line VV in FIG. 2;

FIG. 6 is a diagram for explaining another embodiment of the present invention, and is a diagram corresponding to FIG. 1;

FIG. 7 is a diagram for explaining still another embodiment of the present invention, and is a diagram corresponding to FIG. 3;

FIG. 8 is a diagram for explaining still another embodiment of the present invention, and is a diagram corresponding to FIG. 1;

FIG. 9 is a bottom view of the bar cutting device shown in FIG. 8;

FIG. 10 is a diagram illustrating a main part when the rotation angle of the pressing member is different in FIG. 8;

[Explanation of symbols]

10: Bar material cutting device 12: Bar material 14: Posture stabilizing member 16: Disk-shaped rotary cutting tool 18: Cutting machine 20: Pressing member # 42: Guide member, # 144, 146: Guide wall portion, 14
8, 150: back plate {(moving member)} (tool guiding device) 54: pressing concave surface (54a: first pressing plane, 54b: second)
Pressing plane)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-24630 (JP, A) JP-A-56-11031 (JP, U) JP-A-64-42821 (JP, U) JP-A-1 60818 (JP, U) Jikoh 5-36572 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B23D 45/12 B23D 45/16

Claims (5)

(57) [Claims] 1. A longitudinal cutting machine having an outer peripheral blade and having at one end a disk-shaped rotary cutting tool which is driven to rotate around a rotation axis parallel to the axial direction to cut a bar. a bar cutting device comprising, a front Symbol bar pressing member having a contact capable of pressing the concave on the outer peripheral surface of, provided between the pressing member the cutting machine, provided on the cutting machine was said disc-shaped rotary cutting tool rectilinearly said cutter so as to approach along a plane perpendicular to the rotation axis direction of and circular plate-shaped rotary cutting tool along the longitudinal direction on the bar a tool guiding device for guiding the cutting machine to the tool
Press in the direction that includes the component of the guiding direction by the guiding device.
By this, the rotation axis of the disk-shaped rotary cutting tool is the rod
The posture of the cutting machine in a state parallel to the axial direction of the material is safe.
The pressing concave surface is brought into contact with the outer peripheral surface of the
A bar material cutting device characterized by being performed. 2. The tool guide device according to claim 1, wherein the disk-shaped rotary cutting tool is arranged such that the axis of the bar is longer than the extension of the movement trajectory B of the rotation center of the disk-shaped rotary cutting tool. are those guides are to be located on the front side in the rotational direction a of the Jo rotary cutting tool, pressing the concave surface of the pressing member is pressing the bar from the front side in the rotation direction a of the disc-shaped rotary cutting tool The bar cutting device according to claim 1, wherein the bar cutting device has a pressing surface to be pressed. 3. The pressing concave surface includes a pair of a first pressing plane and a second pressing plane that are parallel to a rotation axis of the disk-shaped rotary cutting tool and are adjacent to each other at a predetermined angle. 2. The bar cutting device according to claim 1, wherein 4. The tool guide device includes a guide member fixed to the pressing member and relatively moved with respect to the cutting machine, and is perpendicular to a rotation axis direction of the disk-shaped rotary cutting tool. And a relative rotation unit configured to relatively rotate the pressing member and the guide member by a predetermined angle around one axis in order to change a relative angle between the flat surface and the axial direction of the bar. The bar cutting device according to any one of claims 1 to 3 . 5. The rod according to claim 4 , wherein said relative rotation means includes rotation angle limiting means for positioning a position where said relative angle is vertical and a position where said relative angle is said predetermined angle. Material cutting equipment.