JPH0696241B2 - Canna - Google Patents

Description

Description: [Industrial field of use] The present invention relates to a canner equipped with a rotary blade having a plurality of blades provided on a rotary drum in a replaceable manner.

[Prior Art] A canna that is equipped with a blade on a rotary cylinder and constitutes a rotary blade that is rotated to cut wood and the like gradually deteriorates in sharpness as it is used, requiring replacement with a new blade and polishing. Become.

Such blades can be replaced either by replacing all the rotary blades or by leaving the rotary cylinder as it is and removing only the blades so that they can be replaced.

Therefore, as a planer in which the rotary drum is provided with a plurality of blades that can be exchanged, a configuration as described in, for example, US Pat. No. 434788 is known.

FIG. 2 shows the contents thereof, and shows a rotary blade in which the blade is replaceable on the rotary cylinder.

Then, the rotary drum 22 configured to rotate in the circumferential direction.
A plurality of mounting devices 23 for mounting and fixing the blade 24 to the rotary drum 22 in a replaceable manner are provided on the outer peripheral portion of the above, and are configured to be rotated by an electric motor or the like.

The mounting device 23 for the blade 24 is provided with a guide plate 25 that determines the fixing position of the blade 24 when the blade 24 is replaced, and a blade retainer 26 that fixes the blade 24 to the rotary cylinder 22.

The guide plate 25 is provided with a convex portion 32 on the contact surface with the blade 24 in order to obtain a reference for determining the position of the cutting edge of the blade 24.

The blade holder 26 is attached to the upper part of the guide plate 25 by
It is provided so as to come into contact with both 22 and the guide plate 25, and the central portion thereof is firmly tightened and fixed to the rotary drum 22 with a bolt or the like.

Further, the blade 24 is provided with a concave portion 31 corresponding to the convex portion 32 provided on the guide plate 25, and is configured to be fitted to each other.

When replacing the blade 24, first loosen the bolts that fix the blade presser 26 to the rotary drum 22, and then the protrusion 32 of the guide plate 25.
Since the blade 24 no longer presses the concave portion 31 of the blade 24, the blade 24 can move in the rotation axis direction of the rotary drum 22 in the fitted state of the convex portion 32 and the concave portion 31.

Pull out the blade 24 in this state, then insert the new blade 24 to be installed and tighten the blade holder 26 bolts
The convex portion 32 of 25 presses the concave portion 31 of the blade 24 to fix the blade 24 at a predetermined position on the rotary drum 22.

At this time, the planer using the rotary drum 22 having the conventional configuration is
A guide plate 25 that determines the position of the blade 24 and a blade presser 26 that presses the blade 24 are individually fixed to the rotary cylinder 22.

Therefore, when assembling the rotary cylinder 22, the guide plate
After fixing 25 to the rotary cylinder 22, it is necessary to fix the blade retainer 26 to the rotary cylinder 22 again.

Also, when replacing the blade 24, the guide plate 25
The blade 24 must be attached or removed while it is fixed to 22.

[Problems to be Solved by the Invention] The conventional planer configured as described above has the following disadvantages.

With such a conventional configuration, when replacing the blade of the planer,
First, the blade retainer 26 for fixing the blade 24 is loosened, but the guide plate 25 remains fixed to the rotary drum 22.

Therefore, the blade 24 is in a state of being attached to the rotary drum 22 by the guide plate 25, and when the blade 24 is pulled out, the concave portion 31 of the blade 24 that defines the position of the blade 24 and the convex portion of the guide plate 25. It is carried out by pulling out along with the fitting with 32.

Further, when the blade 24 is pulled out, it is configured to be performed in a direction parallel to the rotation axis of the rotary drum 22, and therefore, a part of the end of the blade 24 protruding from the rotary drum 22 is used as a grip allowance. To do.

At this time, the grip margin of the blade 24 when the blade 24 is pulled out is usually very small, and the force for holding the grip margin is limited.

Therefore, if the blade 24 is moved in the axial direction of the rotary cylinder 22, the blade 24 cannot be grasped sufficiently and cannot be easily pulled out.

In this way, when the blade 24 is pulled out from the rotary drum 22, the distance between the guide plate 25 and the rotary drum 22 does not widen so that the blade 24 must be moved in the axial direction of the rotary shaft using a jig or the like. However, there was a problem that replacement of the blade 24 was troublesome.

Due to such a problem, if a certain length of blade is projected from the rotary drum, it will be easier to pull it out, but since the rotary drum and the guide plate do not support the end of the blade in normal use, the blade will not be supported.
24 was easy to break and was dangerous.

Further, at the time of assembly, the guide plate 25 used to adjust the position of the blade 24 has to be fixed to the rotating drum 22, and further, the guide plate 25 has to be fixed at a plurality of positions, so that the position It was not possible to easily construct a jig for accurately obtaining.

An object of the present invention is to solve the above problems and provide a planer in which the distance between the guide plate 25 and the rotary cylinder 22 is large and the replacement is easy when the blade 24 is replaced with the rotary cylinder 22.

[Means for Solving the Problems] The present invention includes a notch portion having an L-shaped cross section formed on the outer periphery of a rotary drum, and a mounting device fitted into the notch portion. A guide plate fixed to the joining surface of the guide plate, a convex portion formed on the guide plate, a blade positioned with a concave portion that fits into the convex portion, and a blade that is mounted on the mounting device and the rotary cylinder. The problem is solved by bringing the mounting device into close contact with the bolt that is clamped so as to be clamped by and the contact surface of the cutout portion that is perpendicular to the extending direction of the blade when tightening the bolt.

[Operation] By loosening the bolt fixing the blade retainer, the pressing of the blade is released together with the guide plate, and the blade can be easily removed and replaced.

The positioning of the blade is performed by fitting the concave portion formed on the blade and the convex portion formed on the guide plate, and the guide plate is positioned at a right angle to the joint surface of the rotary drum that holds the blade. Positioning is performed by bringing the mounting device into close contact with the contact surface.

Therefore, when removing the blade, loosen the blade retainer to widen the distance between the blade retainer and the blade, and the blade can be easily removed.When fixing the blade, remove the blade retainer from the rotary cylinder. If it is fixed in a state of being in close contact with the contact surface, the position will be accurately determined.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of a planer according to the present invention, and is a view showing a cross section of a rotary blade cut perpendicularly to a rotation axis.

In FIG. 1, a rotary blade 1 is provided so as to rotate so that a rotary drum 2 is provided with two blade mounting devices 3 and a blade 4 is rotated.

The mounting device 3 is provided on the joint surface of the cutout portion of the rotary drum 2 formed by cutting out a plurality of locations on the outer peripheral portion of the columnar shape.

Further, the mounting device 3 includes a guide plate 5 that determines the position of the blade 4 with respect to the rotary drum 2, and a blade retainer 6 that fixes the blade 4.
And are provided.

During assembly, when the blade retainer 6 is attached to the attachment position of the rotary drum 2, the blade retainer 6 contacts the attachment position of the rotary drum 2 so that the position of the blade edge with respect to the rotation axis of the rotary drum 2 is at a predetermined position. The contact surface 2a that contacts the blade retainer 6 is provided so that

The method of fixing the guide plate 5 and the blade presser 6 to the cutout portion of the rotary drum 2 is such that the guide plate 5 and the blade presser 6 are integrated and the blade presser 6 is formed by the cutout of the rotary drum 2. It is performed by fixing it to the surface with bolts 7 or the like.

The blade retainer 6 and the guide plate 5 are joined to each other by a mounting portion 8 formed on the blade retainer 6 so as to correspond to the shape of the guide plate 5.
The mounting portion 8 is provided with a locking portion 10 that engages with a fixing portion 9 that fixes the guide plate 5.

The guide plate 5 and the blade 4 to be mounted are provided with concave portions 11 and convex portions 12 that engage with each other in order to determine the position of the blade 4 when mounted on the mutual contact surfaces.

In such a configuration, when mounting the blade 4, the blade 4 is placed and sandwiched between the rotary drum 2 and the guide plate 5 of the mounting device 3,
This can be done by engaging the concave portion 11 and the convex portion 12 and tightening the bolt 7 for fixing the blade pressing member 6 to the rotary drum 2.

At this time, tightening the bolt 7 causes the blade retainer 6 to contact the contact surface 2a.
And the position of the cutting edge becomes a predetermined position.

When pulling out the blade 4 from the mounting device 3, by tightening the bolt 7, the blade holder 6 can be moved in the circumferential direction with respect to the rotation axis.

Then, the guide plate 5 for fixing the blade 4 to the rotary shaft moves in the circumferential direction together with the blade retainer 6, so that the dimension between the rotary drum 2 and the guide plate 5 increases.

Therefore, the engagement between the concave portion 11 and the convex portion 12 of the guide plate 5 and the blade 4 is released, and the blade 4 can be pulled out in the direction perpendicular to the rotation axis.

The rotating cylinder 2 is provided with protrusions that protrude the blades 4 from both sides of the rotating cylinder 2.
It can be easily pulled out by sandwiching it from both sides or by grasping the protruding portion on one side.

Further, since the guide plate 5 is fixed to the blade retainer 6, by tightening and loosening the bolt 7 that holds the blade retainer 6, the dimension between the rotary cylinder 2 and the guide plate 5 can be easily adjusted. It is possible to adjust the strength with which the blade 4 is pressed.

Since the guide plate 5 is fixed to the blade retainer 6 to set the position of the blade 4, the position of the blade 4 can be adjusted by fixing the guide plate 5 to the blade retainer 6 with a jig during assembly. Since the adjustment can be easily performed and the blade 4 can be accurately assembled regardless of the rotary cylinder 2, only the blade retainer 6 can be assembled in a large amount in another process, which is advantageous in the assembly process.

[Advantages of the Invention] According to the present invention, since the blade retainer to which the plate provided with the guide of the blade is fixed is detachably attached to the rotary drum, the dimension between the guide plate and the rotary drum can be adjusted to the blade retainer. It can be spread easily by loosening the mounting bolts.

When the blade is attached or replaced, the engagement between the blade and the guide plate can be completely released, and the blade can be easily pulled out from the rotary cylinder.

The position of the blade can be easily adjusted by tightening the bolts while fixing the blade presser to the contact surface of the rotary cylinder, so that the blade can be replaced easily and reliably, and an epoch-making planer can be constructed. Moreover, the effect that the blade can be easily assembled and the blade can be accurately and easily attached is particularly remarkable.

[Brief description of drawings]

FIG. 1 is a view showing a cross section of a rotary blade cut perpendicularly to a rotation axis in an embodiment of a planer using the present invention, and FIG. 2 is a plan view of a conventional planer. It is a figure which shows the rotating cylinder comprised possible. 1 ... Rotating blade, 2 ... Rotating cylinder, 2a ... Abutting surface, 3 ... Mounting device, 4 ... Blade, 5 ... Guide plate, 6 ... Blade retainer, 7 ... Bolt, 8 ... Mounting part, 9 ... Fixed part,
10 …… Locking part, 11 …… Recessed part, 12 …… Projected part.

Claims (1)

[Claims] 1. A canner in which a plurality of blades are replaceably mounted on a rotary drum. A cutout portion having an L-shaped cross section is formed on the outer periphery of the rotary drum, and a mounting device fitted to the cutout portion is provided. A guide plate fixed to a joint surface with the cutout portion of the device, and a convex portion formed on the guide plate,
A blade positioned with a concave portion that fits into this convex portion,
A bolt for tightening the blade so as to be sandwiched between the mounting device and the rotary cylinder, and the mounting device is closely attached to the contact surface of the cutout portion perpendicular to the extending direction of the blade when tightening the bolt. And Canna.