JP3383161B2 - Stair side girder grooving machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grooving process used for previously forming an insertion groove of a step plate and a fitting groove of a riser plate forming a stairway on a side girder forming the staircase. Regarding the improvement of the machine.

[0002]

2. Description of the Related Art From the standpoint of preparing a staircase construction operation at a construction site, as a building material, a side girder component of a staircase in which an insertion groove of a step plate and a fitting groove of a riser plate are provided in advance. Widely used. At the construction site,
Along the lengthwise direction, the insertion groove of the step plate and the insertion groove of the riser plate are successively provided, and the side girder component material is cut as it is or cut to a desired length. It is used as a side girder on the stairs.

Conventionally, however, the grooving of the side girder component has been performed by using a face milling cutter having a plurality of cutting edges on its end face, which is called a router bit. This is done by moving it relative to the side girder components. That is, typically, a processing machine equipped with a head in which a router bit is attached to a shaft end of a vertical main shaft so as to be movable up and down, forward and backward, and left and right has been used for grooving. In such a processing machine, the head is lowered so that a fitting groove having a desired depth can be formed in the side girder component placed on the table, and the side girder configuration is performed by the router bit. The head is moved back and forth and left and right so that the groove having a predetermined length, width, and angle can be successively applied from one side edge to the other side edge of the material, and the groove forming process is performed. I was doing.

[0004]

In such a conventional grooving machine, the blade is the router bit, and the router bit has a relatively small diameter based on the width of the groove. For this reason, if the head provided with the router bit is moved too fast, it is expected that the router bit will be bent or bent, and there is a limit to increasing the moving speed of the head.
As a result, in such a conventional grooving machine, it was difficult to shorten the grooving processing time per side girder.

Further, the cutting blade attached to the end face of the router bit having the small diameter as described above necessarily has a poor blade holding property, and the router bit needs to be replaced relatively frequently. It was

[0006] Therefore, an object of the present invention is to provide a grooving machine suitable for eliminating the disadvantages of the conventional technique, and particularly for grooving the side girder component of the stairs at high speed.

[0007]

In order to achieve the above-mentioned object, in the invention according to claim 1, the grooving machine S for the stair-side girder W is formed into a plate-shaped part which constitutes the stair-side girder W. A table 10 having a substantially rectangular mounting surface on which a material is mounted; and a first blade K1 for at least inserting insertion grooves M1 of a plurality of step plates provided on the stair side girder W into the side girder W, A head H provided with a second blade K2 for forming a plurality of riser board fitting grooves M2 provided in the side girder W on the side girder W, and the head H at least in the longitudinal direction of the table 10. A support mechanism 20 for movably supporting the width direction and a movement of the head H by the support mechanism 20 moves the first blade K1 and the second blade K2 with respect to the side beam W. It is a processing machine S that is moved to sequentially form the groove M on the side girder W. , One or both either said first tool K1 and the second tool K2 were assumed to have configured the flat milling shape HF which attached the plurality of cutting edges on the periphery.

According to the second aspect of the invention, the groove forming machine S for the stair-side girder W according to the first aspect of the invention is provided.
At least the first knife K1 in the flat milling cutter H
The third cutting tool K3, which is configured to be F, cuts the groove bottom Mb of the groove end portion Ma in the insertion groove M1 of the step plate formed by the first cutting tool K1. The blade K3 is configured as a front milling cutter SF having a plurality of cutting edges on its end face.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, typical embodiments of the present invention will be described.

The groove-grooving machine S for the stair-side girder W according to this embodiment has at least a first cutting tool K1 for providing the side-girder W with insertion grooves M1 for a plurality of step plates provided on the stair-side girder W. And a second blade K2 that applies the fitting grooves M2 of the plurality of riser plates provided on the side girder W to the side girder W. By moving the second knife K2 relatively, the groove M is inserted into the side girder W.
In the processing machine S, the first and second blades K1 and K2, or both, are configured as a flat milling cutter HF having a plurality of cutting edges on the outer circumference. .

Therefore, according to the grooving machine S for the stair-side girder W according to this embodiment, the flat milling shape H is used.
The first knife K1 and the second knife K configured in F
Both and / or one of K1 and K2 can sequentially provide the stair-side girder W with the insertion groove M1 of the plurality of step plates and / or the insertion groove M2 of the riser plate. .

Further, since either or both of the first and second blades K1 and K2 are configured as a flat milling cutter HF, the first and second blades K1 and K2.
It is less likely that the first and second blades K1, K2 will be damaged even if the head H provided with is moved relatively quickly, and as a result, the groove M can be grooved on the side girder W. It can be done as fast as possible.

Further, the blade holding of the first and second blades K2 is relatively good.

The sequential grooving of the groove M with respect to the side girder W can, for example, move the head H equipped with the first and second blades K1 and K2 downward depending on the depth of the groove M. The head H in the front-back direction y.
One of the grooves M is moved by one movement in the front-back direction y so that the head H can be moved in the width direction of the side girder W and in the left-right direction x (the length direction of the side girder W). Then, the head H is moved in one of the left-right direction x and then in the front-rear direction y again so that the groove M of the next order can be sequentially repeated. This can be done by making the head H movable.

Further, for example, the side girder W is configured to be movable upward depending on the depth of the groove M, and the side girder W is arranged in the width direction of the side girder W and the length direction of the side girder W. So as to move toward one side, and one of the grooves M is grooved by one reciprocating motion in the width direction, and then, after being moved by a predetermined dimension toward either side in the length direction, By reciprocating in the width direction again, the table 10 on which the side girder W is mounted can be moved with respect to the head H so that the groove M of the next order can be sequentially repeated. You can do it.

Further, at least the first cutting tool K1 in the grooving machine S according to the above-mentioned embodiment is configured as a flat milling cutter HF, and a step plate formed by the first cutting tool K1 is inserted. Groove terminal end Ma in the groove M1
Is provided with a third blade K3 for cutting the groove bottom Mb, and the third blade K3 is configured as a face mill SF having a plurality of cutting edges on its end face.
It is one of the best embodiments of the present invention.

According to this embodiment, the insertion groove M1 of the step plate formed by the first knife K1 can be arranged so as to have a uniform depth over the entire groove M1. .

That is, the insertion groove M1 of the step plate formed by the first knife K1 formed in the face milling SF is formed so that the groove bottom Mb becomes gradually shallower at the groove end Ma. A third blade K3 configured in a face milling SF for cutting only the groove end Ma.
By including the above, it is possible to uniformly arrange the depth of the groove M1 provided by the first knife K1.

The third cutting tool K3 is formed into a face milling SF, but since the cutting by the third cutting tool K3 is performed only on the groove end portion Ma of the insertion groove M1, this third cutting tool K3 is formed. Even if the cutting time by the three blades K3 is added, the entire processing time for grooving the side girder W is the same as that of the front milling cutter SF called the router bit for all the grooves M formed in the side girder W. It will be shorter than when using a blade.

A more specific embodiment of the present invention shown in FIGS. 1 to 29 will be described below.

It should be noted that FIG. 1 shows the grooving machine S1 as viewed from the side so that the overall structure of the grooving machine S1 can be easily understood, and FIG. Seen, and FIG. 3 shows the state seen from the right side in FIG.
Shown respectively.

Further, in FIG. 4, a part of the first support base 21 is shown so that the configurations of the first support base 21 and the second support base 22 which constitute the support mechanism 20 of the head H can be easily understood. The cross section is shown. Further, FIG. 5 is a front view of the vertical drive unit 22d for facilitating understanding of the configuration of the vertical drive unit 22d that supports the third support base 23 so as to be vertically movable, and FIG. It is shown as the state of the surface.

FIG. 7 shows the head H as seen from the front so that the structure of the head H can be easily understood. Further, FIG. 8 shows the head H as seen from above, and FIG. 9 shows it as seen from the side.

Further, FIGS. 10 and 11 show the main part of the second head H2 in cross section so that the structure of the second head H2 having the second blade K2 can be easily understood. Further, FIG. 12 shows the second head H2 as viewed from above.

Further, FIGS. 13 and 14 show the first head H1 as seen from the side, so that the structure of the first head H1 provided with the first blade K1 can be easily understood.
Further, FIG. 15 shows the first head H1 as viewed from above.

Further, FIGS. 16 and 17 show the third head H3 as seen from the side, so that the structure of the third head H3 provided with the third blade K3 can be easily understood.
18 shows the third head H3 as seen from above.

Further, FIG. 19 shows the second knife K2 viewed from the direction of the rotation axis so that the structure of the second knife K2 can be easily understood, and FIG. 20 shows the second knife K2 orthogonal to the rotation axis. Shown from the direction of doing. Further, FIG. 20 shows the first blade K1 as seen from a direction orthogonal to the rotation axis so that the configuration of the first blade K1 can be easily understood, and FIG.
2 is shown as viewed from the direction of the rotation axis. Further, FIG. 23 shows the third blade K3 as seen from a direction orthogonal to the rotation axis so that the configuration of the third blade K3 can be easily understood, and FIG. Shown from the direction.

Further, in FIG. 25, it is easy to understand how the second blade K2 is cut by the movement of the second head H2 on the side girder W component placed on the table 10.
Representing the configuration of the second head H2 and the table 10,
Shows. Further, in FIG. 26, it is easy to understand how the first gutter K1 is cut by the movement of the first head H1 on the side girder W component placed on the table 10,
Representing the configuration of the first head H1 and the table 10,
Shows.

Further, FIG. 27 shows and shows the structure of the first blade K1 and the side girder W so that the manner of grooving the insertion groove M1 of the step plate by the first blade K1 can be easily understood. There is. Further, in FIG. 28, a second blade K2 and a second blade K2 are provided so that it is easy to understand how the insertion groove M2 of the riser plate is grooved to the side girder W provided with the insertion groove M1 by the second blade K2. The structure of the side girder W is shown and shown. Furthermore, FIG.
In order to easily understand how the corner of the groove end portion Ma of the insertion groove M1 is trimmed by the third blade K3 with respect to the side girder W provided with the insertion groove M1 and the insertion groove M2, The configuration of the third blade K3 and the side girder W is shown and shown.

The groove grooving machine S1 shown in FIGS. 1 to 29 includes a first cutting tool K1 for forming a plurality of step plate insertion grooves M1, M1 ...
Fitting grooves M of a plurality of riser plates provided on the side girder W
2, M2 ... and a second blade K2 for applying the side girder W to the side girder W.

That is, the grooving machine S1 according to this embodiment includes a head H provided with the first and second blades K1 and K2, and a plate-shaped working material forming the stair-side girder W. Table 1 provided with a substantially rectangular mounting surface for mounting
0, the length direction of the table 10 (horizontal direction x), the width direction of the table 10 (front-back direction y), and a support mechanism 20 that supports the head H so as to be movable in the vertical direction z. I have it.

The support mechanism 20 is provided with a first support base 21 which is movable in the left-right direction x by being guided by a left-right guide rail 30a provided on the base 30 along the length direction of the table 10. A second support table 22 that is movable in the front-rear direction y by being guided by a front-rear guide rail 21a provided on the upper surface of the first support table 21 in a direction orthogonal to the length direction of the table 10. A third support base 23 that is movable in the vertical direction z by being guided by a vertical guide rail 22b provided in the vertical direction z on the side surface 22a of the second support base 22 facing the table 10. It is made up of more.

More specifically, in this embodiment, the base 30 is provided with a pair of left and right guide rails 30a, 30a in parallel with each other with a space between the base 30 and the pair of left and right guide rails. A ball screw 30c which is rotationally driven by a motor 30b is provided between 30a and 30a. The ball screw 3 is attached to the lower surface of the first support 21.
0c is inserted, and a nut (not shown) that engages with the ball screw 30c is assembled. Therefore, the ball screw 30 is driven by the motor 30b.
By applying the desired rotation to c, the ball screw 3
The nut is screwed back and forth in the axial direction of 0c, and as a result, the first support base 21 to which the nut is assembled can be arbitrarily moved in the left-right direction x at any time.

The first support base 21 thus moved in the left-right direction x is also provided with a pair of front and rear guide rails 21a, 21a on the upper surface in parallel with each other with a space therebetween, and the pair of front and rear guides. The motor 21 is placed between the rails 21a and 21a.
A ball screw 21c is provided which is driven to rotate by b. Then, the ball screw 21c is inserted into the lower surface of the second support base 22, and the ball screw 21c
A nut 22c that engages with is attached. Therefore, by giving the desired rotation to the ball screw 21c by the motor 21b, the nut 22c is screwed back and forth in the axial direction of the ball screw 21c, and as a result, the second support to which the nut 22c is assembled is attached. The table 22 can be freely moved in the front-back direction y at any time.

A pair of upper and lower guide rails 22b, 22b arranged in parallel at a distance are provided on the side surface 22a of the second support base 22 which is moved in the front-rear direction y and faces the table 10 as described above. An up-and-down drive unit 22d including a ball screw 22f vertically supported between the pair of up-and-down guide rails 22b and 22b and a motor 22e for rotationally driving the ball screw 22f is provided. Further, in this embodiment, the third support base 23 is provided with the mounting surface 23a of the head H, and the ball screw 22f is inserted on the side facing the mounting surface 23a, and The ball screw 22f
It is configured as a plate-like body provided with a nut 23b that meshes with the. Therefore, by applying a desired rotation to the ball screw 22f by the motor 22e, the nut 2 is moved in the axial direction of the ball screw 22f.
3b is screwed back and forth, and as a result, the third support base 23, to which the nut 23b is assembled, can be arbitrarily moved in the vertical direction z.

In this embodiment, cylinders 22g are provided on both upper sides of the vertical drive unit 22d. The protruding end of the plunger rod 22h of the cylinder 22g is fixed to the third support base 23, and the third support base 23 vertically moved by the rotation of the ball screw 22f is moved before and after the movement. It has a structure that can be stably supported.

With respect to the mounting surface 23a of the third support base 23 in the support mechanism 20 configured as described above, in this embodiment, the first head H1 provided with the first blade K1. And a second head H2 provided with the second blade K2 are attached so that the blades K1 and K2 are positioned below, and the first head H1 and the second head H2. A third head H3 including a third blade K3 is attached between them.

The first, second and third heads H1,
Both H2 and H3 are vertically movable with respect to the third support base 23. That is, in this embodiment, a cylinder 23c for projecting the plunger rod 23d downward is provided at the upper end portion of the third support base 23.
The protruding ends of the heads are fixed to the heads H1, H2, H3. Therefore, in this embodiment, by operating the cylinder 23c, only one of the heads H1, H2, and H3 is positioned below and the rest is pulled up. be able to.
Incidentally, in the figure, the reference numeral 23e indicates each head H.
It is a guide rail that guides the vertical movement of 1, H2, and H3 by the cylinder 23c.

The first head H1 has a vertical spindle 50 having the first knife K1 attached to the lower end thereof, a frame 51 for supporting the vertical spindle 50, and a frame 5
1 and a motor 52 for driving the vertical main shaft 50 to rotate.

In this embodiment, the first knife K1 is configured as a face milling SF knife which is called a router bit and has a rotation axis located on the axis of the vertical main shaft 50. .

Further, the second head H2 pivotally supports the vertical shaft 41 having the second blade K2 at the lower end portion and the motor 45 for rotating the second blade K2, and the vertical shaft 41. A frame 44 and a motor 40 above the frame 44 for rotating the vertical shaft 41 at any time.
It has a configuration including and.

In this embodiment, the second knife K2 is a flat milling cutter H with its axis of rotation horizontally.
It is configured as an F blade. The rotary shaft 42 of the second cutter K2 configured in the flat milling cutter HF is pivotally supported by the arm 43 assembled to the lower end of the vertical shaft 41, and the second rotary shaft 42 has a second rotary shaft 42. Knife K
The belt 49 is hung between the pulley 47 provided on the end opposite to the side on which 2 is provided and the pulley 43 provided on the drive shaft 46 of the motor, and drives the motor 45. The second blade K2 can be rotated by.

Further, the third head H3 has a vertical main shaft 60 having the third blade K3 attached to the lower end thereof,
A frame 61 for supporting the vertical main shaft 60 and a motor 62 above the frame 61 for rotating the vertical main shaft 60 are provided.

In the present embodiment, the third knife K3 is also configured as a front milling SF knife called a router bit which has a rotation axis on the axis of the vertical spindle 60. . In this embodiment, the third blade K3 has a smaller diameter than the first blade K1.

Grooving machine S1 according to this embodiment
Since it has the above-mentioned configuration, first, with respect to the side girder W constituent material of the stairs placed on the table 10, the insertion grooves M1, M1 ... The beams W can be sequentially applied at predetermined intervals in the length direction of the beam W.

That is, first, the cylinder 23c is operated to move the first head H with respect to the third support base 23.
Lower only 1 down. Then, the third support 23
By driving the motor 22e.
On the other hand, the first blade K1 is moved downward to a position where the side girder W is provided with the insertion groove M1 having a desired depth. After the setting of the first knife K1 in this way, one side edge E1 side in the length direction of the processed material constituting the side girder W placed on the table 10 (in this embodiment, The side edge E2 of the processed material forming the side girder W facing the side on which the left and right guide rails 30a are provided) from the side edge E2 facing the side edge E2 to the upper surface of the side girder W. While adjusting the amount of movement of the first support base 21 in the left-right direction x and the amount of movement of the second support base 22 in the front-rear direction y so that the groove M1 is formed,
Cutting with the first blade K1 is sequentially performed at a plurality of positions along the length direction of the side girder W. (Fig. 2
7) In this embodiment, the width of the insertion groove M1 is wider than the diameter of the first knife K1. Therefore, the insertion groove M1 is formed by moving the first knife K1 from one side edge E1 side of the side girder W toward the other side edge E2 side thereof, and thereafter, the insertion groove M1.
At the groove end portion Ma of the insertion groove M1, the insertion groove M1 is slightly moved in a direction substantially orthogonal to the longitudinal direction thereof, and again the one side edge E
It is done by moving it toward the 1st side. This allows
Inserted grooves M of a plurality of step plates that are substantially parallel to each other with respect to the processed material forming the side girder W of the stairs placed on the table
1, M1 ... Can be provided at predetermined intervals in the length direction of the side girder W.

Further, with respect to the processed material constituting the side girders W of the stairs placed on the table 10, the second blades K2 form fitting grooves M2, M2 ... Can be applied in sequence along the lengthwise direction at predetermined intervals.

That is, first, the cylinder 23c is operated to move the second head H with respect to the third support base 23.
Lower only 2 downwards. (In advance, the first head H1
Is lowered downward, the cylinder 23c
Is operated to pull up the first head H1 and pull down the second head H2. ) Next, the angle of the second cutting tool K2 provided in the second head H2 is the angle of the fitting groove M2 provided on the side girder W (the length of the work material forming the side girder W). The motor 4 so as to match the inclination of the fitting groove M2 with respect to the side edge extending in the direction.
By driving 0, the vertical shaft 41 having the second blade K2 at the lower end is rotated. Next, by driving the third support base 23 by the motor 22e, the second blade K2 forms the fitting groove M2 of the desired depth in the side girder W with respect to the second support base 22. Move down to the application position. After the setting of the second blade K2 in this way, one side edge E1 side across the length direction in the processed material that constitutes the side girder W placed on the table 10 (in this embodiment, The side edge E2 of the processed material forming the side girder W facing the side on which the left and right guide rails 30a are provided) from the side edge E2 toward the opposite side edge E2. While adjusting the amount of movement of the first support base 21 in the left-right direction x and the amount of movement of the second support base 22 in the front-rear direction y so that the groove M2 is formed, the second tool K2 is used. Cutting is sequentially performed at a plurality of locations along the length of the side girder W.
(FIG. 28) As a result, with respect to the processed material forming the side girders W of the stairs placed on the table 10, the fitting grooves M2, M2, ... It can be applied at a predetermined interval in the length direction.

Further, the side girder W of the stairs placed on the table 10 and having the insertion groove M1 of the step plate previously formed therein
The corners of the groove end portion Ma of the insertion groove M1 can be sequentially cut by the third blade K3 with respect to the processed material constituting the.

That is, first, the cylinder 23c is operated to move the third head H with respect to the third support base 23.
Lower only 3 down. (When the first or second head H1 or H2 is lowered in advance, the cylinder 23c is operated to operate the first or second head H.
1, H2 is pulled up, and the third head H3 is lowered. ) Then, the third support 23 is attached to the motor 2
2e is driven to the position where the tip of the third blade K3 is brought into contact with or close to the groove bottom Mb of the insertion groove M1 formed by the first blade K1 with respect to the second support base 22. , Move downward. After setting the third blade K3 in this way, one side edge E1 side in the length direction of the processed material forming the side girder W placed on the table 10 (in this embodiment, From the side edge side facing the side on which the left and right guide rails 30a are provided in the processed material forming the side girder W),
The third blade K3 is moved along the insertion groove M1 toward the side edge E2 opposite to the side edge E2, and the insertion groove M
The amount of movement of the first support 21 in the left-right direction x and the second support 22 in the front-rear direction y so that the third blade K3 is moved along the edge Ma of the groove end portion 1. Cutting with the third knife K3 is sequentially performed while adjusting the amount of movement.
(FIG. 29) As a result, the first blade K having a relatively large diameter is provided.
1. Insertion grooves M1 of the plurality of step plates previously provided by 1.
It is possible to sequentially perform the cutting for adjusting the corners of the groove end portions Ma of No. 3 into an acute angle.

In this embodiment, the grooving machine S1 is used for grooving the work material forming the side girder W, and the table 1 of the support mechanism 20 for the head H is grooved.
It can be performed by one reciprocating movement in the length direction of 0 and one forward or backward movement. That is, after grooving with the first knife K1 is performed by moving the support mechanism 20 from one end side to the other end side of the table 10, the grooving with the second knife K2 is supported. This is done by moving the mechanism 20 from the other end side of the table 10 toward the one end side, and subsequently, cutting with the third blade K3 is performed by moving the support mechanism 20 from the one end side of the table 10 to the other end. By moving toward the side, the insertion groove M1 of a desired plurality of step plates and the insertion groove of the riser plate that communicates with the insertion groove M1 with respect to the processed material that constitutes one side girder W M2 and can be applied.

In the figure, reference numeral 11 indicates a positioning member 1 which is in contact with one end edge of the processed material which constitutes the side girder W placed on the table 10 in the longitudinal direction.
It is a clamp member that clamps the side girder W between the clamp and the side girder 5. The clamp member 11 is assembled to the arm 14 fixed to the plunger rod 13 of the cylinder 23c provided below the mounting surface of the table 10, and the side girder W is not clamped by operating the cylinder 23c. In addition, the configuration is such that this sandwiching is released.

Then, as shown in FIGS. 30 and 31,
Another configuration example of the head H and grooving using the head H shown in FIGS. 32 to 35 will be described.

Here, FIG. 30 shows the head H as seen from the front so that the structure of the grooving machine S2 constituted by using the head H according to the other structure example can be easily understood. In addition, FIG. 31 shows the head H as viewed from above.

Further, in FIG. 32, the side girder W and the first blade K1 of the side girder W and the first blade K1 are shown so that it is easy to understand the manner in which the insertion groove M1 of the step plate is grooved by the first blade K1 provided in the head H. The structure is shown and shown. Further, in FIG. 33, it is easy to understand how the second groove K2 provided in the head H is used to groove the fitting groove M2 of the riser plate.
The configurations of the side girder W and the second blade K2 are shown and shown. Further, FIG. 34 shows the side girder W and the side girder W so that it is easy to understand how the groove bottom Mb of the groove terminal end Ma of the insertion groove M1 of the step plate is cut and arranged by the third blade K3 provided in the head H. The configuration of the third blade K3 is shown and shown.

The grooving machine S2 equipped with the head H shown in FIGS. 30 to 31 has a first cutting tool K1 for forming a plurality of step plate insertion grooves M1 provided on the stair side girder W on the side girder W. And that both the second cutting tool K2 for forming the fitting grooves M2 of the plurality of riser plates provided on the side girder W on the side girder W are configured as flat milling HF knives,
It is different from the head H of the grooving machine S1 according to the embodiment shown in FIGS. 1 to 29.

The first head H1 'provided with the first cutting tool K1 has substantially the same structure as the second head H2, and is arranged so as to be symmetrical to the second head H2. .

That is, in the configuration example of the head H shown in FIGS. 30 and 31, the first head H1 'is used.
Is the first knife K1 at the lower end and the first knife K
1. A vertical shaft 41 equipped with a motor 45 for rotating 1, a frame 44 supporting the vertical shaft 41, and a frame 4
4 and a motor 40 which is located above the vertical shaft 41 and rotates the vertical shaft 41 at any time.

The first cutting tool K1 is constructed as a flat milling cutter HF cutting tool with its axis of rotation horizontally. The rotary shaft 42 of the first knife K1 formed in the flat milling cutter HF is rotatably supported by the arm 43 assembled to the lower end of the vertical shaft 41, and the first rotary shaft 42 has the first rotary shaft 42. A belt 49 is hung between a pulley 47 provided on an end portion on the side opposite to the side where the knife K1 is provided and a pulley 48 provided on a drive shaft 46 of the motor 45. The first blade K1 can be rotated by driving the.

Therefore, according to the configuration example of the head H shown in FIGS. 30 and 31, the side girder W of the stairs placed on the table 10 is constituted by the first cutter K1 forming the flat milling cutter HF. It is possible to sequentially form the insertion grooves M1 of the plurality of step plates on the processed material in the length direction of the side girder W at predetermined intervals.

That is, first, the cylinder 23c is operated to move the first head H with respect to the third support base 23.
Lower only 1 '. Then, the first head H
The angle of the first knife K1 provided in 1'is the angle of the insertion groove M1 formed in the side girder W (the side girder W).
The inclination of the insertion groove M1 with respect to the side edge of the processed material forming the
By driving 0, the vertical shaft 41 having the first blade K1 at the lower end is rotated. Then, the third support 23 is driven by the motor 22e, and the first tool K1 forms the insertion groove M1 of the desired depth in the side girder W with respect to the second support 22. Move down to position. After the setting of the first knife K1 in this way, one side edge E1 side in the length direction of the processed material constituting the side girder W placed on the table 10 (in this embodiment, However, the side girder W from the side edge facing the side where the left and right guide rails 30a are provided in the processed material forming the side girder W) toward the opposite side edge (not shown). While adjusting the amount of movement of the second support base 22 in the left-right direction x and the amount of movement of the second support base 22 in the front-rear direction y so that the fitting groove M2 is formed on the upper surface of Cutting with one blade K1 is sequentially performed at a plurality of positions along the length direction of the side girder W. (FIG. 32) As a result, the table 10
With respect to the processed material which constitutes the side girder W of the stairs placed on the, the insertion grooves M1, M1 ... Of a plurality of substantially parallel step plates are provided at predetermined intervals in the length direction of the side girder W. Can be given.

Also, in this embodiment, the groove end portion M of the insertion groove M1 formed by the third blade K3 and the first blade K1 forming the flat milling HF.
By cutting the groove bottom Mb of a, the depth of the insertion groove M1 can be made uniform.

That is, first, the cylinder 23c is operated to move the third head H with respect to the third support base 23.
Lower only 3 down. (When the first or second head H1 or H2 is lowered in advance, the cylinder 23c is operated to operate the first or second head H.
1, H2 is pulled up, and the third head H3 is lowered. ) Then, the third support 23 is attached to the motor 2
By driving 2e, with respect to the second supporting base 22, the first cutting tool K3 is provided with the desired depth so that the insertion groove M1 has a desired depth even at the groove end portion Ma of the insertion groove M1. The portion left uncut by the cutting with the blade K1 (the portion indicated by the broken line in FIG. 35) is moved downward to a position where it can be cut. After setting the third knife K3 in this manner, the table 1
The third blade K3 is moved along the insertion groove M1 from the one side edge E1 side in the longitudinal direction of the processed material constituting the side girder W placed at 0 toward the opposite side edge side. The amount of movement of the first support 21 in the left-right direction x and the second support 22 so that the third blade K3 is moved along the edge Ma of the insertion groove M1. The third blade K3 while adjusting the amount of movement in the front-back direction y.
The cutting is sequentially performed. (Fig. 34)
The groove bottoms Mb of the groove end portions Ma of the insertion grooves M1 of the plurality of step plates previously performed can be sequentially cut.

As shown in FIGS. 30 and 31, both the first and second cutters K1 and K2 are flat milling H-shaped.
When configured as F, the grooving of the processed material forming the side girder W can be further speeded up.

[0065]

EFFECT OF THE INVENTION The groove forming machine S for the stair side girder W according to the present invention firstly inserts the insertion grooves M1, M1 ... Of the plurality of step plates provided in the stair side girder W into the side girder W. Of the side girder W, and a second blade K2 of the girders M2, M2 ... One knife K1
And the second knife K2 are relatively moved to move the side girder W
A machine S for sequentially applying the grooves M to a flat milling cutter HF in which both or one of the first knife K1 and the second knife K2 has a plurality of cutting edges on its outer circumference.
Therefore, a plurality of the step plates are provided for the stair-side girder W by the first blade K1 and / or the second blade K2 or both of the first and second blades K1 formed in the flat milling cutter HF. Insertion groove M1 and the insertion groove M2 of the riser plate
Or both of them can be sequentially applied.

Since either or both of the first and second blades K1 and K2 are formed into a flat milling cutter HF, the first and second blades K1 and K2.
It is less likely that the first and second blades K1 and K2 will be damaged even if the head H provided with is relatively quickly moved, and as a result, it is possible to form the groove on the side girder W. It can be done as fast as possible. Further, the blade holding of the first and second blades K1 and K2 is relatively good.

[Brief description of drawings]

FIG. 1 is a front view of a grooving machine S1.

FIG. 2 is a plan view of a grooving machine S1.

FIG. 3 is a side view of the grooving machine S1

FIG. 4 is a sectional view of a main part of a support mechanism 20.

FIG. 5 is a front view of a vertical drive unit 22d.

FIG. 6 is a vertical cross-sectional view of a vertical drive unit 22d.

FIG. 7 is a front view of a head H.

FIG. 8 is a plan view of a head H.

FIG. 9 is a side view of the head H.

FIG. 10 is a sectional view of an essential part of a second head H2.

FIG. 11 is a sectional view of an essential part of a second head H2.

FIG. 12 is a plan view of a second head H2.

FIG. 13 is a side view of the first head H1.

FIG. 14 is a front view of the first head H1.

FIG. 15 is a plan view of the first head H1.

FIG. 16 is a side view of a third head H3.

FIG. 17 is a front view of a third head H3.

FIG. 18 is a plan view of a third head H3.

FIG. 19 is a side view of the second blade K2.

FIG. 20 is an end view of the second blade K2.

FIG. 21 is a side view of the first knife K1.

FIG. 22 is an end view of the first knife K1.

FIG. 23 is a side view of a third blade K3.

FIG. 24 is an end view of a third blade K3.

FIG. 25 is a side view showing a state of use of the grooving machine S1.

FIG. 26 is a side view showing a usage state of the grooving machine S1.

FIG. 27 is a configuration diagram showing a state of grooving the side girder W.

FIG. 28 is a configuration diagram showing a state of grooving the side girder W.

FIG. 29 is a configuration diagram showing a state of grooving the side girder W.

FIG. 30 is a front view showing the head H of the grooving machine S2.

FIG. 31 is a plan view showing a head H of the grooving machine S2.

FIG. 32 is a block diagram showing how the side girder W is grooved.

FIG. 33 is a configuration diagram showing how to groove the side girder W.

FIG. 34 is a configuration diagram showing a state of grooving the side girder W.

FIG. 35 is a configuration diagram showing how to groove the side girder W.

[Explanation of symbols]

S Grooving machine W side digit M groove M1 insertion groove M2 fitting groove K1 first knife K2 second knife HF flat milling

Claims (2)

(57) [Claims] 1. A table having a substantially rectangular mounting surface on which a plate-shaped processed material forming a stair-side girder is mounted, and at least an insertion groove of a plurality of step plates provided on the stair-side girder on the side. A head provided with a first blade provided on the girder and a second blade provided on the side girder with fitting grooves for a plurality of riser plates provided on the side girder, and at least the length of the table for the head. A support mechanism for movably supporting the direction and the width direction, and by moving the head by this support mechanism, by moving the first blade and the second blade with respect to the side girder,
A processing machine for sequentially applying the groove to the side girder, wherein either or both of the first blade and the second blade are configured as a flat milling cutter having a plurality of cutting edges on the outer periphery. Grooving machine for stair girders, which is characterized by being 2. A third blade having at least a first blade configured in the shape of a flat milling cutter and for cutting a groove bottom of a groove terminal portion in an insertion groove of a step plate formed by the first blade. The third cutter is configured in the shape of a face mill having a plurality of cutting edges on its end face.
Grooving machine for stair girders described.