JPS5914175Y2 - Tip exchangeable pressure bar for veneer cutting machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a tip-changeable pressure bar for veneer lace or veneer cutting machines such as slicers.
The purpose of this is to attach and detach a wear-resistant tip that is divided into a plurality of pieces in the direction along the cutting edge in the area that applies pressure near the boundary between the wood and the veneer near the cutting edge for cutting the veneer. Moreover, when the tip is installed, the tip is fixed safely and reliably, and the tip can be easily replaced to improve work efficiency, and a sufficient pressure effect can be obtained with a low-cost pressure bar. There is a particular thing.

As is well known, pressure bars are used to improve the quality of cutting veneers by preventing tip cracking, and depending on how they are not managed, this can lead to a decline in the quality of the veneers.

In any case, it is inevitable that the pressure bar will wear out due to long-term cutting, and parts of it may become damaged due to stones and metals present in the raw water. It's not an easy thing to do and requires a lot of care.

In particular, when polishing a worn or damaged pressure bar using a knife polisher, the entire pressure bar is actually removed from the veneer lace body, which is not easy to do and may cause some parts to be damaged. In some cases, it is necessary to polish the entire length of the pressure bar, which is extremely wasteful.

This is because conventional pressure bars are integrally constructed by brazing a wear-resistant special alloy to a long base metal, like a cutting knife.

On the other hand, the chipped and worn parts occur at the tip of the so-called pressure bar that presses the wood, so even if the pressure bar is divided into multiple parts and only the chipped pressure bar is replaced, the tip part will be replaced. If it is not possible, economical efficiency will not be improved, so this invention focuses on this point and aims to improve workability and economical efficiency by making the wear-resistant tip easily attachable and detachable.An example of its implementation is shown in the drawing. The explanation is as follows.

As shown in FIGS. 1 and 2, 1 is a raw wood, and 2 is a cutting blade for cutting a veneer (hereinafter simply referred to as a cutting blade).

3 is a pressure bar, which is divided into a plurality of pieces and provided in parallel in the direction along the cutting edge 2, as shown in the figure, or alternatively, although not shown, is provided integrally along the entire length.

Reference numeral 4 denotes a mounting base for the pressure bar 3, which is provided integrally with the tool rest 5.

In the case of the divided pressure bar 3, one end is tightened and fixed to the mounting base 4 with a bolt 6, and it is provided in the shape of a leaf spring so that the deflection can be fully utilized.

By doing so, the chance of the blade becoming clogged by small pieces of raw wood will be drastically reduced.

However, the shape and mounting means of the pressure bar 3 are not limited to the illustrated embodiment, and the design can be changed in various ways, and the width of the divided pressure bar 3 can also be designed as appropriate. Actually, one with a width of 30 mm was used.

The wood pressing portion of the pressure bar 3, that is, the cutting blade 2
A groove 8 into which a wear-resistant tip (hereinafter simply referred to as a tip) 7 can be attached is formed in a portion that presses the boundary between the raw wood 1 and the veneer S, and a plurality of tips 7 are detachably attached thereto. .

The shape of the groove 8 is simply formed into a concave shape or a dovetail shape.

On the other hand, if the tip 7 is made of cemented carbide, it has the advantage of being highly wear resistant and easy to be formed into circular or polygonal cross sections, but by standardizing the shape, accurate positioning can be achieved. Become.

For example, if a chip 7 with a square cross section is used, four sides can be used and a maximum of eight corners can be used, which is highly economical.

Furthermore, when the tip 7 is installed in the groove 8, it is held safely and securely so that it will not come off or shift laterally due to vibration or friction with the wood, and the tip 7 can be replaced. If it is not easy to remove and install, the initial purpose will not be achieved and it will become meaningless.
A mounting seat 9 is formed which partially communicates with the groove 8.

The mounting seat 9 is formed by drilling from the surface of the pressure bar 3 on the groove 8 side, as shown in FIG. 3, or from the surface opposite to the groove 8, as shown in FIG. do.

The mounting seat 9 is formed to a depth such that its bottom overlaps the bottom of the groove 8, and a pressing member 10 is inserted into the mounting seat 9 to press the chip 7 from the portion where the groove 8 and the mounting seat 9 communicate. At the same time, the tip 7 is locked by mutual frictional force.

If the elastic member 10 is a partially cut-out elastic ring 10a as shown in FIG. 5a, or a half-split spring 10b as shown in FIG. It is possible to obtain pressing force.

FIG. 5C shows an example of a practical embodiment in which the elastic member 10 is made of rubber 10C. In this case, the elastic member 10 is slightly larger in shape than the mounting seat 9, and is used under pressure.

Furthermore, as shown in FIG.
0, a pressing force f acts, and its component force f1 presses the chip 7 against the side wall of the groove 8, and f2 acts to push the chip 7 into the bottom of the groove 8, so that the chip 7 is held extremely firmly.

Furthermore, the larger the spring constant of the elastic member 10, the more reliable the fixing can be.

Next, if the pressing member 10 is not held in close contact with the mounting seat 9 at all times, the chip 7 will eventually shift, so a distance collar is provided to prevent the pressing member 10 from lifting off from the mounting seat 9. It is equipped with 11.

For example, as shown in Figure 6, the collar 11 is approximately the same size as the mounting seat 9.
The protruding portion 11 has a thickness substantially equal to the thickness of the pressing member 10.
b, which is screwed in from above the pressing member 10 by the screw 11.
It is fixed at C.

In order to replace the tip 7 in the above configuration, the tip 7 can be removed by pushing it out along the groove 8, and vice versa. Push in the chip 7.

If the tip 7 is directly fixed with a screw, for example, the screw thread may be crushed due to frequent tip replacement, or it may be corroded by tree sap, etc., and it is time-consuming to attach and detach, making it unsuitable for quick work. If the pressure bar 7 is soldered, even if the pressure bar is divided, it must be replaced together with the chip, which is uneconomical.

In this invention, a wear-resistant chip is removably attached to the wood pressurizing part of the pressure bar, which is subject to the most wear, so that it can be safely and securely fixed and easily replaced by the pressing action of the elastic member. Because it is a pressure bar, even if a part of the tip is damaged or worn out due to stones, iron, etc. mixed in the log, it is enough to replace only that part of the tip, and the other pressure bars will not be affected at all. It is.

However, since the pressure member is always held by the resistance collar, there is no risk of the pressure member falling off or being lost when replacing the tip, and as mentioned above, replacing the tip is easy and requires less work. It is excellent in terms of performance and economy.

In addition, we have rationally solved the problem that if the pressure member is not held stably, the chip will eventually fall off, making it impossible for the pressure bar to function stably over a long period of time. It is of high practical value.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, FIG. 1 is a side view showing the state of use, FIG. 2 is an explanatory view showing the state of installation, and the third,
FIG. 4 is an explanatory diagram showing the mounting seat of the pressure member and the state in which it is mounted, FIGS. 5 a, 1), and c are illustrations of the embodiment of the pressure member, and FIG. 6 is an explanatory diagram of the death collar.

Claims (1)

[Scope of utility model registration request] 1. A pressure bar that is equipped with a wear-resistant tip divided into a plurality of pieces along the cutting blade in a part that applies pressure near the boundary between the log and the veneer near the cutting blade for cutting the veneer, the tip of the pressure bar being , a groove is formed in the same direction as the cutting edge for cutting a veneer, a wear-resistant tip is provided in the ridge, and a part is communicated with the groove in order to press the tip against the groove wall. A cutting veneer characterized in that a mounting seat is bored, a pressure member is inserted into the mounting seat, and a distance collar is provided to hold the pressure member in close contact with the mounting seat. Pressure bar with replaceable tips for machines. 2. Divide the pressure bar into multiple pieces and arrange them in parallel.
A tip-replaceable pressure bar for a veneer cutting machine as claimed in claim 1, wherein a wear-resistant tip is detachably inserted into each pressure bar. 3. A tip-changeable presser in a veneer cutting machine according to claim 1 or 2 of the utility model registration claim, in which the mounting seat is formed by drilling from the surface of the groove of the pressure bar. Utility model registration claim item (■) or 2 formed by forming a hole from the surface opposite to the groove of the bar.
Tip exchangeable pressure bar for the veneer cutting machine described in section. 5. A tip-replaceable pressure bar for a veneer cutting machine as set forth in claim 1 or 2 or 3 or 4, in which the wear-resistant tips are made of cemented carbide. 6. Tip exchange type in a veneer cutting machine according to claim 1, 2, 3, 4, or 5 of the utility model registration claim, in which the pressing member is an elastic ring with a partially cut out part. pressure bar. 7o Utility model registration claim 1 where the pressing member is rubber
Tip exchangeable pressure nozzle <-0 in the veneer cutting machine described in paragraph 2 or 3 or 4 or 5