JPH0140643Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutter head for cutting a joint into wood for wooden construction.

[Prior Art] Conventionally, such a cutter head has been proposed, for example, as described in Japanese Utility Model Publication No. 58-4642, which also describes a double cutter structure and its necessity.

In wooden buildings, the cross-sectional dimensions of the structural materials differ depending on where they are used, and the dimensions of the joints must be changed accordingly. To do this, it is necessary to change the cutter to one with a different cutting outer diameter, but it is troublesome and inefficient to change the cutter every time the material to be processed changes, so it is necessary to change the cutter to one with a different cutting outer diameter. A so-called multi-axis cutter head can be considered, in which cutter heads are prepared and any cutter head can be selected and used as needed.

However, in the conventional cutter head,
Since a transmission means such as a belt and a drive means such as an electric motor are required separately from the cutter shaft, the device inevitably becomes larger and it is not possible to create a multi-shaft system in which multiple cutter heads are compactly arranged adjacent to each other. It was a disadvantage.

In addition, when using multiple axes, each cutter head must be able to move freely back and forth and be positioned in front of other cutter heads when in use, so that unused cutter heads do not interfere with the workpiece. requires a moving mechanism.

However, in the conventional coaxial double cutter mechanism of the cutter head, the outer cutter is fixed on the pedestal, and the inner cutter is pivotally supported on a co-rotating shaft that slides on the axial center of the outer cutter. The mechanism for moving the cutter head back and forth and the mechanism for moving the entire cutter head when the cutter head is multi-axis cannot be linked and constructed as one body, and each must be provided separately.

[Problem that the invention attempts to solve]

This invention eliminates the need for a transmission means such as a belt by using the shaft of the motor as the axis of rotation of the cutter, and also utilizes the two-stage movement of the piston rod that moves the motor in the front-rear direction to allow the outer cutter and inner cutter to interact with each other. It is an object of the present invention to provide a cutter head for a shigouchi, which can also be moved back and forth in between, simplifying the mechanism and downsizing the device.

[Means for solving problems]

In the cutter head for joint processing according to the present invention, an inner cutter having a small cutting outer diameter is concentrically attached to the rotating shaft of a motor installed so as to be movable in the front-rear direction, and the inner cutter is attached to the motor. The co-rotating shaft is supported so as to be rotatable and movable in the axial direction with respect to the sleeve, and the co-rotating shaft is fitted on the outside so that it can co-rotate and slide in the axial direction with respect to the rotary shaft, thereby cutting a large cutting outer diameter. an outer cutter having an outer cutter concentrically attached to the motor and two for moving the motor from a retracted end to a first forward position and a second forward position forward of the first forward position, respectively; A piston rod whose movement is controlled in stages is connected so as to be movable together in the axial direction; and a rod which is urged forward by the motor are connected to each other so as to be movable together in the axial direction via a shifter fixed to the rod, and further, when the motor moves to the first forward position, the A stopper facing a stop collar attached to the rod is installed in a fixed position to prevent the forward movement of the rod at a position where the rod is advanced by movement of the motor to the first forward position. has.

[Effect]

The cutter head for joint processing according to the present invention uses the axis of the motor as the axis of rotation of the cutter, so there is no need for a transmission means such as a drive belt, and the cutter head can be made smaller. These can be compactly arranged adjacent to each other, which is advantageous in terms of installation space, and requires less movement distance when moving the workpiece depending on the cutter head selected and used.

To use any cutter head, the piston rod first advances the motor to the first forward position. In this case, at the same time as the inner cutter attached to the rotating shaft of the motor advances to the first stage forward position, the co-rotating shaft to which the outer cutter is attached and the rod connected to this co-rotating shaft are activated by the spring. Since it is urged forward by the elastic force, both cutters move forward together with the inner cutter stored inside the outer cutter, and in this state, the large insertion part can be cut into the workpiece W. can.

When the motor is further advanced to the second forward position, the inner cutter advances to the second advanced position, but the outer cutter is prevented from advancing by the stopper. That is, the co-rotating shaft slides with respect to the advancing inner cutter, and the outer cutter remains at the first stage of advancement position. In this state, the inner cutter protrudes further than the front end surface of the outer cutter, so that the large insertion portion and the dovetail groove can be cut into the workpiece at the same time.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a state in which a plurality of cutter heads A to A are arranged in parallel, and in FIG. 1, cutter head A is selected.

In each cutter head A, a motor base 1 with a motor 2 mounted on the upper surface is mounted on the device base 5, and a dovetail-shaped groove 3 recessed in the lower surface of the motor base 1 is connected to the upper surface of the device base 5. It is installed so as to be slidable in the front-rear direction via a protruding ridge 4 which is protruded and fitted into the groove 3.

A piston rod 9 of a two-stage stroke type cylinder 8 installed at the rear of the device base 5 is inserted into a moving groove 6 formed with a notch in the device base 5, and the motor base 1 can move together with this piston rod 9. is connected to. The piston rod 9 of the cylinder 8 has two positions: a first stage movement position in which the piston rod 9 moves forward by a certain distance from its rearward end position, and a second movement position in which it advances by a certain distance from this first stage movement position.
The motor 2 is set to be controlled to move in two steps to the moving position of the piston rod 9.
A first forward position, which is advanced by a distance l1 from the waiting position of the rearward end by the stepwise movement operation, and this first forward position.
The second position further advanced by a distance l2 from the forward position of
movement is controlled to the forward position.

A conical inner cutter 11 having a small cutting outer diameter is concentrically attached to the tip of the rotating shaft 10 of the motor 2 with a bolt 12. The shaft 13 is the rotation shaft 1
The key 14 is fixed at 0 and fitted into the key groove of the co-rotating shaft 13, and is fitted externally so as to be co-rotatable and slidable in the axial direction. The inner cutter 11 is attached to the cutter flange 15.
An outer cutter 16 having a larger outer cutting diameter is mounted concentrically.

A co-rotating shaft 13 is disposed within a substantially cylindrical sleeve 20 that is attached concentrically to the front end surface of the motor 2.
A bearing case 18 for rotatably supporting the bearing case 18 is slidable in the axial direction via the front bearing 17 and the rear bearing 17 which is locked to the co-rotating shaft 13 by a retaining ring 19. Pins 22 that project horizontally laterally are inserted into both sides of the bearing case 18, respectively.

Elongated holes 21 into which the pins 22 are inserted are provided in both sides of the sleeve 20 along the axial direction, and the length of the elongated holes 21 is set such that the pins 22 can move by a distance l2. This elongated hole 21 allows the relative position of the sleeve 20 and the co-rotating shaft 13 to be displaced by a distance l2.

A rod 24, which is suspended horizontally parallel to the rotating shaft 10, is fitted and supported in a pair of front and rear bearings 25 and 26, which are respectively protruded from the front and rear ends of the top surface of the motor 2, so as to be slidable in the axial direction. The front end of the rod 24 protrudes forward of the motor 2 above the sleeve 20, while the rear end of the rod 24 is prevented from coming off by a retaining ring 30. The vicinity of the center of the rod 24 is loosely inserted into a stopper 28 that is formed in a semicircular shape and installed at a fixed position relative to the distal end of a fixing member 27 whose base end is fixed to the device base 5. A stop collar 29 is fitted near the center of the motor 24, and the stop collar 29 is disposed at a distance l1 rearward from the stopper 28 when the motor 2 is in a standby state when the motor 2 is retracted to the rearward end. When the rod 24 is moved forward by moving to the first forward position, the stopper 2
8, and at this position the forward movement of the rod 24 is prevented by a stopper 28. A spring 31 fitted around the rod 24 is interposed between the stop collar 29 and the rear bearing 26 in order to always urge the rod 24 forward.

The upper end of a shifter 23, which has an approximately inverted V-shape in front, is fitted into the tip of the rod 24. The tip of the sleeve 20 is loosely inserted into the shifter 23, and the lower ends of both sides of the shifter 23 are The outer ends of the pins 22 are inserted into each other, and the shifter 23 and the sleeve 20 are connected by both pins 22 so that they can move together in the axial direction.

In a standby state in which the motor base 1 and the motor 2 are retracted to the retraction end, the piston rod 9 of the cylinder 8 is advanced to the first stage movement position, and the motor 2 is advanced by a distance l1 to the first forward movement position. As shown in FIG.
However, in this state, the shifter 23 and the co-rotating shaft 13 move forward by a distance l1, and the rotating shaft 1
0 moves forward by a distance l1, so the inner cutter 1
1 and the outer cutter 16 advance together to the first stage forward position with the inner cutter 11 stored in the outer cutter and maintaining the relative position shown in FIG. 2, and the outer cutter 16 can be used. By using the outer cutter 16, only the large cutting portion M shown in FIG. 7 can be cut into the workpiece W.

In this state, when the piston rod 9 of the cylinder 8 is further advanced to the second stage movement position and the motor 2 is further advanced by a distance l2 to the second forward position, the sleeve 20, the rotating shaft 10 and the inner The cutter 11 moves forward by a distance l2, but since the stop collar 29 is in contact with the stopper 28, the forward movement of the rod 24 shifter 23, bearing case 18, and co-rotating shaft 13 is blocked by the stopper 28, and the outer cutter 16 moves forward. The inner cutter 11 remains at the first stage forward position, and as shown in FIG.
Both the outer cutter 16 and the outer cutter 16 become usable, and the dovetail groove H and the large insertion portion M can be cut simultaneously on the workpiece W.

Furthermore, when the piston rod 9 is retracted from the second stage moving position to the first stage moving position in this state, the inner cutter 11 retreats to the first stage forward position and retreats into the outer cutter 16, The state shown in Fig. 5 is reached, and the piston rod 9 is moved to the first position.
When retracted from the stage movement position to the rearward end position, both the inner cutter 11 and the outer cutter 16 retreat to the standby position, resulting in the state shown in FIG. 4. At this time, the rod 24 and shifter 23 are connected to the retaining ring 3.
0 is pushed by the rear bearing 26, so it returns to its original position together with the motor 2.

[Effect of idea]

The cutter head for joint processing according to the present invention has the effect that a plurality of cutter heads can be arranged compactly adjacent to each other when the cutter head is made multi-axis, and the device can be downsized and the mechanism can be simplified.

[Brief explanation of the drawing]

Figure 1 is a layout diagram when the cutter head is made multi-axial, Figure 2 is an axial cross-sectional view of the cutter head,
Fig. 3 is a sectional view taken along the line X-X, Fig. 4 is a partial sectional view showing the cutter head when not in use, Fig. 5 is a side view showing the motor advanced to the first forward position, and Fig. FIG. 6 is a side view showing the state in which the motor has advanced to the second forward position, and FIG. 7 is a perspective view showing the state in which the workpiece is tied. A... Cutter head, 10... Rotating shaft, 11
...Inner cutter, 13...Co-rotating shaft, 16...Outer cutter, 20...Sleeve, 24...Rod, 27...Stopper, 29...Stop collar, 31...Spring.

Claims (1)

[Scope of utility model registration request] An inner cutter having a small cutting outer diameter is attached concentrically to the rotating shaft of the motor, which is installed so as to be movable in the front-back direction, while the inner cutter is rotatable in the axial direction relative to the sleeve attached to the motor An outer cutter having a large cutting outer diameter is concentrically attached to the movably supported co-rotating shaft, and is fitted onto the rotary shaft so as to be able to co-rotate and slide in the axial direction.
the motor, and move this motor from the rearward end to the first
forward position, and a second forward position in front of this first forward position.
A piston rod whose movement is controlled in two steps to move the piston rod to the forward position of the piston rod is connected so as to be movable together in the axial direction, and the piston rod is connected to the co-rotating shaft and the piston rod parallel to the rotary shaft with respect to the motor. A rod supported for axial movement and forwardly biased by a spring is connected for joint movement in the axial direction via a shifter fixed to the rod; When the rod is moved to the first forward position, the stopper, which is in contact with the stop collar attached to the rod, is moved forward by the movement of the motor to the first forward position. A cutter head for joint processing, which is characterized by being installed in a fixed position to prevent this.