JP3607751B2 - Supporting device for shape steel drilling machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support device attached to a shape steel drilling machine, and more particularly, to support a shape steel to be drilled from its lower surface in order to prevent bending of a work site when drilling a H-shaped steel web or the like. Relating to the device.
[0002]
[Prior art]
Conventionally, as a drilling machine for drilling a shape steel such as an H-shaped steel, a pair of left and right drilling heads that provide a horizontal cutting feed to the drill to drill the left and right flanges of the H-shaped steel, Drilling machines with a total of three drilling heads are known, which provide a drilling feed in the vertical direction to drill a steel web.
[0003]
In such a shape steel punching machine, conventionally, there are roughly two types of punching methods by each punching head. One of them is that, as shown in FIG. 5, the drilling head D for punching the web is drawn out, and the drilling head D can be moved only in the cross-section direction. As shown in FIG. 6, the other is a method in which the drilling head D can move by a predetermined distance in the longitudinal direction in addition to the crossing direction of the section steel, as shown in FIG. In this state, a group of holes having a two-dimensional pattern is processed only by movement of the drilling head D in a state where the shape steel is sandwiched and fixed.
[0004]
By the way, when drilling an H-shaped steel web or the like by a perforation head (hereinafter referred to as an upper perforation head) that is provided with a cut in the vertical direction, the material is bent by the infeed of the perforation head. Need to support the material from. As a supporting device for such a material, Japanese Utility Model Laid-Open No. 4-76383 discloses an apparatus that is applied to a method in which a drilling head moves only in the crossing direction of the section shown in FIG. This is because the abutting pin is arranged below the structural steel that is clamped and fixed by the vice mechanism, and the abutting pin is moved following the movement of the upper drilling head in the transverse direction of the structural steel. It is a device, and the vicinity of the drilling site by the upper drilling head is always supported by the abutting pin from its lower surface.
[0005]
[Problems to be solved by the invention]
When the technique described in the above publication is applied to the drilling machine shown in FIG. 6 in which the drilling head moves in a two-dimensional direction, in order to follow the position of the drilling head, the abutting pin is moved in the cross-section direction of the section steel. In addition to this, there is a disadvantage that the structure needs to be movable in the longitudinal direction of the shape steel and the structure becomes complicated.
[0006]
Therefore, in a conventional drilling machine in which the drilling head moves in a two-dimensional direction, as shown in FIG. 7, it can be moved up and down outside both ends of the processing range in the longitudinal direction of the shape steel by the upper drilling head. A system has been put to practical use in which two lower support members S1 and S2 are provided and a wooden square member C or the like is disposed between them, and the lower surface of the material is supported by the square member C over a predetermined length. However, depending on this method, as illustrated in FIG. 8, when the workpiece is warped in the longitudinal direction, there is a drawback that the material is not sufficiently supported over the entire processing range by the upper drilling head.
[0007]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a workpiece with a relatively simple configuration in a drilling machine in which a drilling head moves in a two-dimensional direction. An object of the present invention is to provide a support device for a shape steel drilling machine, which can support a material reliably over the entire processing range of the upper drilling head even if the warp is warped in the longitudinal direction.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the support device for a shape steel drilling machine of the present invention is given a displacement in the cross direction of the shape steel by the lateral movement mechanism 3 as shown in FIGS. Main body 2, a support plate 4 having a length in the longitudinal direction of the shape steel at least as long as a machining range in the longitudinal direction of the shape steel by the upper drilling head 15, and a support plate provided on the main body 2. A vertical movement / stop mechanism 5 that supports 4 in an inclined manner in the longitudinal direction of the structural steel and moves up and down as a whole, and fixes the upper surface of the lower support plate 4 in contact with the supported surface of the structural steel. It is characterized by having.
[0009]
Here, as a specific mode of the vertical movement / stop mechanism 5, one cylinder 5 a that pivotally supports the central portion of the lower support plate 4 and moves up and down with respect to the main body 2, and the main body, respectively. 2 is slidably supported in the axial direction and clamps the two vertical rods 5b and 5c, which support both ends of the lower support plate 4 so as to be swingable, and slides the vertical rods 5b and 5c. It can be configured by the clamping devices 5d and 5e to be regulated.
[0010]
[Action]
During drilling by the upper drilling head 15, the lower support plate 4 is lifted to support the vicinity of the drilling site of the material from below, thereby preventing the material from bending, but in the two-dimensional direction of the cross section and the longitudinal direction of the section. Of the piercing operation by the movable upper piercing head, for the movement of the upper piercing head 15 in the cross-section direction, the lower support plate 4 is moved together with the main body 2 by the lateral movement mechanism 3. On the other hand, for the movement of the upper perforation head 15 in the longitudinal direction of the structural steel, the length of the lower support plate 4 in the longitudinal direction of the structural steel is equal to or greater than the processing range of the upper perforation head 15 in the same direction. There is no need to move 4. And even if it is warped in the longitudinal direction of the structural steel by supporting the lower support plate 4 in a tiltable manner in the longitudinal direction of the structural steel and fixing its upper surface in contact with the supported surface of the structural steel, As shown in FIG. 4, the support plate 4 is fixed in a state following the warping of the material, and the material can be reliably supported within the entire processing range of the upper drilling head 15.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a front view of an essential part of a shape steel drilling machine equipped with an embodiment of the present invention, and FIG. 2 is a plan view showing the upper drilling head 15 and its supporting member removed.
[0012]
For example, the workpiece W such as H-shaped steel is supported by the left and right roller groups 11 and 12 on the base 10 by the front and rear two feed main driving mechanisms 13a and 13b and the feed subordinate mechanisms 23a and 23b. The material is fed in the longitudinal direction. That is, each of the feed material main driving mechanisms 13a and 13b is provided with a drive roller d, and each of the feed material driven mechanisms 23a and 23b is provided with an idle roller i, and these two types of rollers are opposed to each other. It constitutes a pinch roller type feeding mechanism. By rotating the drive roller d with the workpiece W sandwiched between the drive roller d and the idle roller i, the workpiece W is fed in the longitudinal direction.
[0013]
The left and right roller groups 11 and 12 are rotatably supported by support members 110 and 120, respectively. One of the support members 110 is fixed on the base 10 and the other support member 120 is a base. 10 is slidably supported on linear guides 20a and 20b provided along the transverse direction of the workpiece W, and this support member 120 is responsive to the width (cross direction) dimension of the workpiece W. Moved accordingly. .
[0014]
The base 10 is provided with a portal frame 14 supported by four support columns 14a to 14d so as to straddle the two feeding mechanisms 13a and 13b. An upper drilling head 15 to which cutting feed in a direction is given, and a cross table 16 for moving the upper drilling head 15 in the transverse direction and the longitudinal direction of the workpiece W are arranged. In addition to the upper drilling head 15, the drilling machine is provided with left and right drilling heads that can be fed in a horizontal direction to drill the left and right sides of the workpiece W, such as the left and right flanges of H-shaped steel. However, these are not shown in FIGS. 1 and 2 for simplicity of explanation. Further, on the base 10, positions that do not hinder the drilling operation by the left and right drilling heads, for example, the opposing surfaces of the front and rear feed material driving mechanisms 13 a and 13 b and the feed material driven mechanisms 23 a and 23 b are processed. There are provided vise mechanisms 13c, 13d, 23c, and 23d (drive portions not shown) on the driving side and the driven side for sandwiching and fixing the material W.
[0015]
The lower support device 1 includes a main body 2 slidably supported on the two linear guides 20a and 20b, and a direction along the linear guides 20a and 20b on the main body 2, that is, a workpiece. It is constituted by a lateral movement mechanism 3 that gives displacement in the transverse direction of W, a lower support plate 4 that is supported by the main body 2 so as to be movable up and down, and a vertical movement / stop mechanism 5 of the lower support plate 4. The cross section of the lower support plate 4 in the transverse direction of the workpiece W is concave, and the length of the workpiece W in the longitudinal direction is the machining range of the upper drilling head 15 in the same direction. Equal to or slightly longer than L.
[0016]
The lateral movement mechanism 3 of the main body 2 measures a screw shaft 3b that is screwed into a female screw 3a provided in the main body 2, a motor 3c that rotationally drives the screw shaft 3b, and a rotation amount of the screw shaft 3b. The main body 2 can be independently moved along the linear guides 20a and 20b by driving the motor 3c. The movement range of the main body 2 by the lateral movement mechanism 3 is equivalent to the machining range of the upper drilling head 15 in the transverse direction of the workpiece W. The lateral movement mechanism 3 is supplied with the same command as the displacement command of the upper drilling head 15 in the transverse direction of the workpiece W from the control unit of the drilling machine. That is, the main body 2 moves in the same direction in conjunction with the movement of the upper drilling head 15 in the transverse direction of the workpiece W.
[0017]
FIG. 3 is an overall configuration diagram of the support device in which an AA enlarged cross-sectional view in FIG. 2 and a hydraulic circuit diagram for driving are shown together. The main body 2 is in a fixed state by restricting sliding of one hydraulic cylinder 5a, two vertical rods 5b, 5c slidable in the axial direction, and the vertical rods 5b, 5c. Clamping devices 5d and 5e are provided, and a vertical movement / stop mechanism 5 for the lower support plate 4 is constituted by these.
[0018]
The hydraulic cylinder 5a is fixed in the vertical direction with respect to the main body 2 with the piston rod facing upward, and supports the central portion of the lower support plate 4 at the tip of the piston rod via a horizontal pin 50a so as to be swingable. ing. The vertical rods 5b and 5c are arranged at predetermined intervals in the longitudinal direction of the workpiece W with the hydraulic cylinder 5a interposed therebetween, and both end portions of the lower support plate 4 via horizontal pins 50b and 50c at the respective front end portions. Is supported so as to be slidable in the axial direction through bushes 2a and 2b provided on the main body 2, and penetrates hydraulically driven clamp devices 5d and 5e. doing. The clamp devices 5d and 5e can press the vertical shafts 5b and 5c from the outer peripheral surface thereof by supplying pressure oil to prevent the movement in the axial direction.
[0019]
Pressure oil is supplied / discharged to the hydraulic cylinder 5a through a closed center type 4-port 3-position direction control valve 51, and each clamp device 2c, 2d has a direction control valve 52 and a pressure increasing valve. Pressure oil is supplied through the booster 53. The direction control valves 51 and 52 are driven and controlled in conjunction with the drilling operation by control signals supplied from the control unit of the drilling machine.
[0020]
In the above-described embodiment of the present invention, when a hole group having a two-dimensional pattern is drilled in, for example, a H-shaped steel web by the upper drilling head 15, the upper drilling head 15 follows the movement when moving in the cross-section direction. Then, the main body 2 moves, and a control signal is supplied to the directional control valve 51 immediately before the upper perforation head 15 starts to be cut to raise the hydraulic cylinder 5a. As a result, the lower support plate 4 rises. However, since the lower support plate 4 is supported by the hydraulic cylinder 5a and the vertical rods 5b and 5c so as to be swingable, the upper surface of the lower support plate 4 will eventually be along the lower surface of the H-shaped steel web. Stop. In this state, a control signal is supplied to the directional control valves 51 and 52 to bring the directional control valve 51 into the neutral position, and at the same time, pressure oil is supplied to the clamping devices 5d and 5e to set the clamping state. Thus, as shown in FIG. 4, even if the H-shaped steel to be drilled is warped in the longitudinal direction, the lower support plate 4 is in the vertical direction with the entire upper surface thereof in contact with the lower surface of the H-shaped steel web. The displacement to is restricted. In this state, when the upper punching head 15 is cut and fed to form a hole, the supporting hole having a length longer than the machining range L in the same direction regardless of the position of the upper drilling head 15 in the longitudinal direction of the shape steel. Since the lower surface of the web of the perforated portion is firmly supported by the lower support plate 4 by the plate 4, the web does not bend.
[0021]
In the above embodiment, as the vertical movement / stop mechanism 5 of the lower support plate 4, a mechanism including one hydraulic cylinder 5a, two vertical rods 5b and 5c sandwiching the hydraulic cylinder 5a, and clamp devices 5d and 5e. However, the present invention is not limited to this. For example, both ends of the lower support plate 4 are swingably supported by two hydraulic cylinders, and each hydraulic cylinder is supported by a closed center type directional control valve. It is possible to employ a mechanism that controls the drive and puts the directional control valve in the neutral position in a clamped state with the lower support plate 4 in full contact with the supported surface. However, in the case of the above-described embodiment, there is no fear of sinking due to leakage of pressure oil unlike the method of directly supporting with a hydraulic cylinder, and the mechanism is simplified and advantageous.
[0022]
【The invention's effect】
As described above, according to the present invention, the support plate having a length equal to or longer than the processing range in the longitudinal direction of the upper piercing head can be used to move the upper piercing head in the transverse direction of the structural steel. Placed on the main body that moves following, and the lower support plate is supported so as to be tiltable in the longitudinal direction of the shape steel and moved up and down as a whole, and in contact with the supported surface of the shape steel Since the upper drilling head is drilled while moving in both the cross-section direction and the longitudinal direction, the upper drilling head supports the two-dimensional movement of the drilling head. The device only needs to be moved in the crossing direction of the shape steel, and the mechanism is simple.In addition, even if the shape steel is warped, the support plate is fixed in accordance with the shape and the drilling position is reliably lowered. Can be supported from.
[Brief description of the drawings]
FIG. 1 is a front view of an essential part of a shape steel drilling machine equipped with an embodiment of the present invention. FIG. 2 is a plan view of FIG. 1 with an upper drilling head 15 and its supporting member removed. Fig. 4 is an overall configuration diagram of the supporting device of the embodiment of the present invention, showing an AA enlarged sectional view and a hydraulic circuit diagram for driving together in Fig. 4. Fig. 4 is an operation explanatory view of the embodiment of the present invention. Explanatory drawing of the type of drilling machine that moves only in the crossing direction of the shape steel. [Fig. 6] Explanatory drawing of the type of drilling machine in which the drilling head moves in the crossing direction and the longitudinal direction of the shape steel. FIG. 8 is an explanatory diagram of a conventional support device in a drilling machine of the type moving in the direction and the longitudinal direction. FIG. 8 is an explanatory diagram of problems caused by the apparatus of FIG.
DESCRIPTION OF SYMBOLS 1 Lower support device 2 Main body part 3 Horizontal movement mechanism 3a Female screw 3b Screw shaft 3c Motor 3d Encoder 4 Lower support plate 5 Vertical movement / stop mechanism 5a Hydraulic cylinder 5b, 5c Vertical rod 5d, 5e Clamp device 51, 52 Direction control valve 10 Base 13a, 13b Feed material main drive mechanism 13c, 13d Drive side vise mechanism 14 Portal frame 15 Upper drilling head 16 Cross table 20a, 20b Straight guide 23a, 23b Feed material driven mechanism 23c, 23d Drive side vise mechanism W Workpiece

Claims (2)

In the shape steel drilling machine, in which a cutting feed in the vertical direction is given to the drill above the shape steel supported on the base, and a drilling head movable in the transverse direction and the longitudinal direction of the shape steel is arranged, the above-mentioned A device for supporting the web or the like from the lower surface when drilling the H-shaped steel web or the like by a drilling head, and a main body part that is displaced in the cross-section direction by a lateral movement mechanism; A lower support plate having a length corresponding to at least the length of a machining range in the longitudinal direction of the shape steel by the drilling head, and provided on the main body portion, and is supported by the lower support plate so as to be inclined in the longitudinal direction of the shape steel. And a vertical movement / stop mechanism for fixing the lower support plate in a state where the upper surface of the lower support plate is in contact with the supported surface of the structural steel. Support device. The vertical movement / stop mechanism is supported by a single cylinder that swingably supports the central portion of the lower support plate and moves up and down relative to the main body, and is supported by the main body so as to be slidable in the axial direction. 2. The apparatus according to claim 1, comprising: two vertical rods that pivotably support both end portions of the plate; and a clamp device that clamps each vertical rod and restricts sliding thereof. Support device for shape steel drilling machine.

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