JPH0529769Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an automatic shifting device for a bushing plate, which allows the cutting tools of, for example, a multi-spindle drill to be easily replaced.

[Conventional technology]

For example, in a multi-shaft drill, a bushing plate is installed on the shaft head to guide the drill (cutting tool).

In order to replace the cutting tool, the guide of this bushing plate must be released.

Conventional bushing plates are installed by attaching guides 22 on both sides of the shaft head 1 as shown in FIG. A guide bar 21 is provided so as to be slidable. A bushing plate 13 is fixed to the tip of the guide bar 21. A cutting tool 14 mounted on the shaft head 1 via a holder 15 is guided through the bushing plate 13. 4' is bushing plate 1
This is a spring that applies an elastic force in the direction of pushing the bar 3 forward, and this urging force penetrates the guide 22 and enters the recess of the guide bar 21, as shown in Fig. 6 (section A in Fig. 5). Inserted stopper pin 2
3.

The working procedure for replacing the cutting tool 14 was as follows.

First, the state shown in the figure is the original position of the equipment that can be processed. In this state, the worker operates the button on the operation panel to slide the shaft head 1 forward, lightly presses the bushing plate 13 against the plate stopper 16, compresses the spring 4' a little, and then presses the operation button. Operate to make an emergency stop of the equipment. As a result, the urging force of the spring 4' is not applied to the stopper pin 23, and the stopper pin 23 is pulled out with a light force. Next, with the stopper pin 23 removed, the operation preparation operation button is operated to move the shaft head 1 backward, and the bushing plate 13 is pushed out by the spring 4'.
The guide of the cutting tool 14 is released. And the blade 14
is removed from the holder 15, and a desired cutting tool 14 is attached to the holder 15.

Next, operate the operation preparation button to
is moved forward, and while pressing the bushing plate 13 against the plate stopper 16, the spring 4' is compressed to fit the stopper pin 23 into the recess of the guide bar 21, and the replacement of the cutting tool 14 is completed.

In addition, in the conventional example shown in FIG. 7 (Japanese Utility Model Publication No. 55-111713), the jig plate 24 is attached to the slide arm so that the slide arms 21 provided on both sides of the shaft head 1 slide synchronously. It is attached to the tip of 21. An L-shaped member 25 is integrally fixed to this jig plate 24, and a bushing plate 13 is fixed to this L-shaped member 25.

In this bushing plate mounting operation, when the shaft head 1 is raised in the direction of the arrow, the slide arm 21 is pushed out by the spring 4' until the stepped portion 28 and the pawl 27 engage. Then, when the shaft head 1 is further raised, the pedestal 26 and the pedestal 30 are separated. Therefore, during normal work, the bushing plate 13
is adapted to move up and down within the engagement range of the stepped portion 28 and the pawl 27.

Next, when replacing the cutting tool 14, the shaft head 1 is lowered, the pedestal 26 and the pedestal 30 are brought into contact with each other, and the spring 4' is slightly compressed to disengage the stepped portion 28 and the pawl 27. The claw 27 is pulled out by manual operation of the handle 29. Then, when the shaft head 1 is raised,
Since the engagement between the stepped portion 28 and the claw 27 is released,
The bushing plate 13 is moved by the spring 4'.
It is pushed out to a position where it comes off from the cutting tool 14. In this state, the cutter 14 is replaced. After replacing the cutting tool 14, the shaft head 1 is lowered, the spring 4' is compressed while pressing the pedestal 26 against the pedestal 30, and the handle 29 is operated to push out the pawl 27. This results in
The replacement of the cutting tool 14 is completed.

Conventional example shown in Fig. 8 (Japanese Utility Model Application Publication No. 56-42818)
This is a swing type, which is in a different category from the slide type according to the present invention. That is, the bushing plate 13 can be swung to the position 13' as shown by the arrow. 4' is a spring, and 14 is a cutting tool.

[Problem that the invention attempts to solve]

In the above conventional example, the shift of the bushing plate shown in FIG.
The shift of the bushing plate shown in the figure requires manual operation due to the stepped portion and the pawl, and there is a problem in that the blade replacement is not automatic and takes time.

In addition, in the case of the conventional example shown in Fig. 5, the procedure for replacing the cutting tool is complicated because it involves a combination of operation on the control panel and manual replacement. If you do, it is extremely dangerous.

Therefore, there are problems in terms of workability and safety. Since the replacement procedure is complicated, it takes a long time for replacement, resulting in a problem that the operating rate of the equipment is low.

On the other hand, in the conventional example shown in FIG.
The presence of the character-shaped member 25 obstructs the replacement of the cutting tool 14, resulting in a problem of poor workability.

[Means for solving problems]

In order to solve the above problems, the present invention attaches a guide bar that can slide in the direction of movement of the shaft head to the shaft head, fixes a bushing plate to the tip of the guide bar, and provides a guide bar stopper at the rear. , a spring that applies a force to push out the guide bar moving together with the shaft head to the front side of the shaft head and a stopper that engages the guide bar stopper are swingably provided, and the movement of the shaft head is used to move the guide bar to the front side of the shaft head. A cam for swinging the stopper to release the lock from the guide bar stopper is provided at a position independent from the shaft head, and a plate stopper is provided in front of the bushing plate independently from the shaft head. This is a characteristic feature.

(Function) Since the present invention is constructed as described above, it has the following functions. That is, a guide bar that is slidable in the direction of movement of the shaft head is attached to the shaft head, a bushing plate is fixed to the tip of the guide bar, and a guide bar stopper is provided at the rear, and the guide moves with the shaft head. Since the spring that applies the force to push the bar toward the front side of the shaft head and the stopper that engages the guide bar stopper are swingably provided, the guide bar, bushing plate, spring, and stopper move together with the shaft head. ,
During machining, it is possible to maintain the locking state between the guide bar stopper provided at the rear of the guide bar and the stopper, thereby maintaining the bushing plate in a predetermined machining state.

Next, when replacing the cutting tool, a spring that applies a force to push the guide bar toward the front side of the shaft head and a stopper that engages the guide bar stopper are swingably provided, and the movement of the shaft head is utilized. A cam for swinging the stopper and releasing the lock from the guide bar stopper is provided at a position independent from the shaft head, so that when the shaft head is moved back, the stopper is guided by the cam and swings, The locked state with the guide bar stopper is released, and the spring pushes the guide bar forward of the shaft head, making it possible to release the bushing plate from the cutting tool.

Next, in order to return to the machining state after changing the cutting tool, a plate stopper is provided in front of the bushing plate independent of the shaft head, and a guide bar is provided so as to be able to swing relative to the shaft head. The stopper that locks on the par is swingably provided, and the cam is provided independently from the shaft head, so
By moving the shaft head forward, the relationship between the stopper and the cam is released, and by continuing to move the shaft head forward, the bushing plate comes into contact with the plate stopper, stopping the forward movement of the guide bar, and only the shaft head moves forward. Then, the stopper attached to the shaft head also moves forward, and when it advances to the guide bar stopper, the stopper swings and the stopper and guide bar stopper are locked, and the cutting tool is inserted through the bushing plate. It becomes possible to return to the processing state.

〔Example〕

An embodiment of the present invention will be described in detail below.

In FIG. 1, stopper brackets 2 are fixed to both sides of the shaft head 1, and a guide bar 3 is supported on the stopper bracket 2 so as to be slidable in the direction of movement of the shaft head 1.

A flange 5 is fixed to the rear end of the stopper bracket 2, and a stopper fulcrum 7 is attached to the flange 5.
A stopper 6 is provided so as to be swingable about the fulcrum.

As shown in FIG. 2, the stoppers 6 are provided on both sides of the shaft head 1 and are connected by a ring bar 10. A spring 18 is attached to the ring bar 10, and a spring bracket 19 fixed to the stopper bracket 2 applies an elastic force so that the link bar 10 is pushed in the direction of arrow A. As a result, the stoppers 6 on both sides rotate synchronously about the fulcrum 7, and are pressed against and engaged with the guide bar stopper 20 formed on the guide bar 3.

As shown in FIGS. 1 and 2, the stopper 6
A cam follower 9 is provided at the lower end of the cam follower 9. A cam 11 is provided at a position where this cam follower 9 comes into contact. Reference numeral 12 denotes a cam bracket, which is provided independently of the movement of the shaft head 1. 17 is a slide. 14 is a cutting tool, 15 is a holder, 1
6 is a plate stopper, and 8 is a stopper guide.

The operation of this embodiment configured as above will be explained next.

In the state shown in Figure 1, the cutting tool 14 is on the bushing plate 1.
3, and is ready for machining. The operation when replacing the cutting tool 14 from this state will be explained. First, the shaft head 1 is moved backward by sliding on the slide 17. This backward movement is performed using an operation panel (not shown). When the shaft head 1 is moved backward in this way, the stopper 6 is swingably attached to the shaft head, and since the cam 11 is provided independently from the shaft head 1, the cam 11 is installed at the lower end of the stopper 6. The cam follower 9 moves from the processing position A to the original position B as shown in FIGS. 3 and 4, and at the slide-out position C, the cam follower 9 is guided by the cam 11 to move It becomes possible to push the amount outward.

In this way, when the cam follower 9 is guided by the cam 11 and pushed outward, the stopper 6 is swingably provided, so the stopper 6 moves from the position A' to the position C' as shown in FIG. The guide bar stopper 20 and the stopper 6 can be disengaged from each other by being pushed outward against the elastic force of the spring 18 to the position shown in FIG.

Then, when the engagement between the guide bar stopper 20 and the stopper 6 is released, the guide bar 3
Since the spring 4 is provided so that it is pushed out to the front side of the shaft head 1, it is possible to move the bushing plate 13 provided at the tip of the guide bar 3 to the position 13' shown by the imaginary line. This makes it possible to release the guide of the cutting tool 14. Thereby, the holder 15 is operated to replace the cutting tool 14.

Next, the operation when returning to the machining state after the cutting tool 14 has been replaced will be explained.

By further advancing the shaft head 1 after the cutting tool 14 has been replaced as described above, the plate stopper 16 is provided in front of the bush plate 13 in a state independent of the shaft head 1. Since the bushing plate 13 can be pressed against the plate stopper 16 and the guide bar 3 is provided so as to be slidable relative to the shaft head, the guide bar 3 can be pressed against the elastic force of the spring 4. It becomes possible to push 3.

A guide bar stopper 20 is provided at the rear of the guide bar 3, and a stopper 6 is swingably provided on the shaft head 1 so as to engage with the guide bar stopper 20. When the guide bar 3 is pushed in until the par 20 passes the stopper 6, the stopper 6 is once pushed out to the position C' by the spring 18 shown in FIG. Then, it becomes possible to return to the position A' at the next instant, and it becomes possible to engage the guide burst stopper 20 and guide the cutting tool 14 to the bushing plate 13 to return to the processing state.

In this way, by moving the shaft head 1 forward and backward,
It becomes possible to guide the cutting tool 14 by the bush plate 13 or to release the guide.

[Effect of idea]

As detailed above, according to the present invention, a guide bar that is slidable in the direction of movement of the shaft head is attached to the shaft head,
A bushing plate is fixed to the tip of this guide bar, and a guide bar stopper is provided at the rear.
A spring that applies a force to push the guide bar moving with the shaft head to the front side of the shaft head and a stopper that locks on the guide bar stopper are swingably provided, so that the guide bar, bushing plate, and spring can be moved. The stopper moves together with the shaft head, and during machining, the guide bar stopper provided at the rear of the guide bar maintains a locked state with the stopper, thereby maintaining the bushing plate in a predetermined machining state.

In addition, when replacing the cutting tool, a spring that applies a force to push the guide bar toward the front side of the shaft head and a stopper that engages the guide bar stopper are swingably provided, and the movement of the shaft head is utilized. Since a cam for swinging the stopper and releasing the lock from the guide bar stopper is provided at a position independent from the shaft head, when the shaft head is moved back, the stopper is guided by the cam and swings, The locked state with the guide bar stopper is released, the guide bar is pushed forward by the shaft head by the spring, and the bushing plate can be released from the cutting tool.

In order to return to the machining state after changing the cutting tool, a plate stopper is provided in front of the bushing plate independent of the shaft head, and a guide bar is provided so as to be able to swing relative to the shaft head. A swingable stopper that locks onto the parr is provided,
Since the cam is installed independently from the shaft head, moving the shaft head forward releases the relationship between the stopper and the cam, and continuing to move the shaft head forward causes the bushing plate to come into contact with the plate stopper. Then, the forward movement of the guide bar stops, only the shaft head moves forward, and the stopper attached to the shaft head also moves forward, and when it advances to the guide bar stopper, the stopper swings and the stopper and guide bar stop are moved forward. The blade is locked and the cutting tool is inserted through the bushing plate, allowing it to return to its working state.

In this way, the guide of the cutting tool by the bush plate and the release of the guide of the cutting tool can be performed by moving the shaft head forward and backward.

This makes it possible to automate tool replacement, greatly shorten the time required for tool replacement, and greatly improve equipment operation rate.There is also no danger associated with tool replacement, which improves safety. was able to improve.

Further, the cutting tool replacement part has only a bushing plate, and there is no member that would interfere with cutting tool replacement, which has an excellent effect of facilitating automation.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Fig. 1 is a perspective view of the automatic bushing plate shift device, Fig. 2 is a right side view of the automatic bushing plate shifting device, and Fig. 3 shows the operating state of Fig. 2 viewed from the front. 4 are schematic diagrams showing the operation of the cam follower. 5 to 8 show conventional examples, FIG. 5 is a perspective view of the bushing plate shift device, FIG. Figure 7 is a partial longitudinal cross-sectional view of a bushing plate shift device that is equipped with a jig plate and uses pawls and stepped portions to regulate the sliding amount of the arm. FIG. 1... Shaft head, 3... Guide bar, 4... Spring, 6... Stopper, 11... Cam, 13...
...butsushi plate, 14...cutting tool.

Claims (1)

[Scope of utility model registration request] A guide bar that is slidable in the direction of movement of the shaft head is attached to the shaft head, a bushing plate is fixed to the tip of the guide bar, and a guide bar stopper is provided at the rear, so that the guide bar that moves together with the shaft head is fixed to the shaft head. A spring that applies a force to push the shaft head forward and a stopper that locks on the guide bar stopper are swingably provided, and the movement of the shaft head is used to swing the stopper and engage the guide bar stopper. A bush plate automatic shift device, wherein a cam for releasing the lock is provided at a position independent of the shaft head, and a plate stopper is provided in front of the bush plate independently of the shaft head.