JPS5815123Y2 - Automatic sawmill with a pair of band saws - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic sawmill that is equipped with a pair of band saws and directly saws wood from two sides.

Conventionally, there have been provided sawmills or sawmill devices that are equipped with a pair of band saws or circular saws and use the pair of saw blades to simultaneously saw transported wood from two sides, but in either case, the entire mechanism is large-scale. However, it has various technical drawbacks, such as limited versatility due to limited applications such as corner sawing, flat splitting, and backboard sawing, and requiring a great deal of labor and skill to perform the work.

For example, as in Japanese Patent Publication No. 47-47155, there is also a device in which a pair of fixed band saws are installed on the left and right sides of a table, and an endless chain band is suspended between the two bands. Since the equipment was developed and provided solely for sawing and splitting logs for chippings, it is technically not suitable for sawing flat plates into various sizes or sawing small-diameter wood into corners due to its purpose and structure. However, since this device requires various auxiliary devices as means for feeding the wood, it cannot be denied that the entire mechanism becomes extremely large-scale.

The present invention was devised in view of the various shortcomings of the conventional methods mentioned above, and although it is equipped with a pair of band saws, the entire mechanism is extremely simple, and it is capable of cutting not only logs and logs, but also ordinary boards and small-diameter wood. The object of the present invention is to provide a new sawmill that can saw wood of any cross-sectional shape and that can save labor and streamline the work.

Hereinafter, the present invention will be described in detail based on an illustrative embodiment.
The sawmill according to the present invention has a long endless conveyor 1 formed by connecting a large number of slat plates 4 at a fine pitch, and suspends it from a driving sprocket 6 and a driven sprocket 7 provided near the front and rear of a table 5. A short endless conveyor 2 is provided along the entire length of the table 5 so that the upper transfer surface of the conveyor 1 is above or at the same position as the surface of the table 5, and is also formed by connecting a large number of slat plates 4 at a fine pitch.
, 3 is suspended on a driving sprocket 8 coaxial with the driving sprocket 6 and a driven sprocket 9 provided near the center of the table 5, and the other 3 is suspended on the driven sprocket 9 provided near the center of the table 5. It is suspended on a driving sprocket 10 provided at a predetermined separation interval and a driven sprocket 11 provided at the same position as the driven sprocket 7, and both 2 and 3 are mounted on the same straight line parallel to the long endless conveyor 1. The endless conveyors 1, 2.3 are arranged in a single strip with a central separation space interposed between them, and each endless conveyor 1, 2.3 is configured to run at a constant speed and in a uniform direction via a continuously variable transmission 12.

It goes without saying that the upper transfer surfaces of the short endless conveyors 2 and 3 are also located on the same plane as that of the long endless conveyor 1.

Moreover, the lower surface of each slat plate 4 of each conveyor 1, 2.3 is supported at the upper transfer lower part of each endless conveyor 1, 2.3 without interfering with the running of each conveyor 1, 2.3. A support member 13 is provided so that the upper transfer surface of each conveyor 1, 2.3 always runs horizontally so as to withstand the load of the wood being placed thereon.

Note that the support beams 13 are fixed to predetermined locations on the left and right table frames 5a, 5b or to other locations directly or indirectly via arm members 14.

Furthermore, the sawmill according to the present invention includes an upper saw wheel 15 and a lower saw wheel 16.
A fixed band saw machine 18 consisting of an endless band saw 17, etc., which is hung between the two cars 15 and 16, is installed on the left side of the table 5,
The bandsaw 17 is disposed inside the space 25 formed in the central separation area of the short endless conveyors 2 and 3 arranged in the above-mentioned strips, that is, on the long endless conveyor 1 side, via a steady rest device 19, which will be described later. and an upper saw wheel 20, a lower saw wheel 21, and both wheels 20.
A movable band saw machine 23 consisting of an endless band saw 22 and the like is installed on the right side of the table 5 so as to be movable left and right, and the band saw 22 is placed outside the space 25, that is, on the opening side, via a steady rest device 24. The double band saws 17 and 22 are arranged so that the wood is directly sawn from two sides at once.

The steady rest device 19 of the fixed band saw 17 and the steady rest device 24 of the mobile band saw 22 can be divided into an upper part and a lower part, as shown in FIGS. 4A, B, and C.
Split type brackets 26a, 26b with a, 27b
The serly rods 28 a , 28 b are positioned and supported by the serly rods 28 a , 28 b and the serly rods 30 a , 30 b are supported by the brackets 29 a , 29 b so as to be adjustable in forward and backward movement. 22 from both sides, the former steady rest device 19 is provided at the bottom of the table 5, and the latter steady rest device 24 is provided on the mobile band saw machine 23.
and the split-type receiving fittings 26a, 2 for both.
6b are installed at different heights so that the band saws 17, 22 can approach by the width of the receiving metal fittings 26a, 26b.

Further, as shown in the figure, a removable guide roller 31 is attached to each of the front and rear ends of the table 5 and a predetermined location of the table right frame 5b.

Therefore, in the present invention machine having the above configuration, the desired lumber that is placed and transferred on the long endless conveyor 1 and the short endless conveyor 3 is efficiently cut from two sides by the pair of band saws 17 and 22. Although the wood is directly sawn, the present invention uses an endless conveyor (long and short) consisting of a large number of slat plates 4 connected at a constant speed and in the same direction as a means of transporting the wood. The wooden slat board 4 is damaged due to slight vibrations caused by running.
The contact resistance against the wood increases, and the wood is stably placed and supported on the slat plate 4, and at the same time, the wood is pushed down by the vector sum of the force in the operating direction of the band saw and the force in the transport direction of the wood. It will be necessary to move forward.

Generally, when sawing two sides at the same time with a pair of band saws or circular saws, the sawing resistance is twice that when sawing with a single band saw or circular saw. Previously, labor-intensive work and skilled skills were required, but with the present invention, the same effect on the wood and the movement of the conveyor can be achieved by simply placing the wood on the endless conveyors 1 and 3, which are the feeding means, and supporting it by hand. The synergistic effect of the movement allows the wood to be automatically transferred and the wood to be directly sawn against the twice the sawing resistance as described above, resulting in extremely labor-saving and efficient sawmilling operations.

Furthermore, in the present invention, when performing two-sided sawing that can effectively achieve such labor saving and efficiency improvement, one of the pair of band saws 17° 22 is of a fixed type and the other 22 is of a movable type. By adjusting the distance between the band saws 17 and 22 as appropriate, it is possible to not only saw logs, small logs, and split planks, but also to set a ruler (not shown) on one side of the band saw 17. The present invention provides an unprecedented multi-purpose sawmill capable of sawing to size and sawing to different sizes.

Moreover, the pair of band saws 17 and 22 are connected to the steady rest device 1 described above.
The special structure of 9.22 allows for extremely close access, making it possible to produce extremely thin plates.

In addition, the present invention has two endless conveyors arranged on the table 5, one of which is suspended over the entire length of the table, and the other is separated at the front and rear of the table 5 to form a central separation space. Since this is characterized by a structure in which the wood is suspended, at least the endless conveyor 1 suspended over the entire length of the former table is in charge of transporting and guiding the wood, which is particularly useful when transporting and directly sawing wood. This is rational and allows the grinding work to be carried out extremely smoothly.

In other words, it is possible to consider a structure in which the two strips are all separated at the front and rear of the table and each endless conveyor is suspended to form a separation space in the entire center area, but in this case, the endless conveyors are suspended over the entire length of the table as in the present invention. Since there is no endless conveyor that acts as a transport guide, the wood may fall into the space in the central area or collide with the edge of the conveyor in front during transport. I don't have to worry about anything happening.

As described above, the present invention provides an automatic lumber machine with a new structure that is highly operable and capable of sawing various types of lumber with one machine.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a sawmill according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view thereof, Fig. 4 A is a plan view showing a steady rest device, and Fig. 4 B is a sectional view. , and Figure C is a front view of the split type receiving fitting. 1...Long endless conveyor, 2,3...
・Short endless conveyor, 4... Slat plate, 1
8... Fixed band saw machine, 23... Mobile band saw machine, 25... Central separation space.

Claims (1)

[Scope of utility model registration request] A long endless conveyor consisting of a large number of slat plates connected at a fine pitch is installed along the entire length of the table, and a short endless conveyor consisting of a large number of slat plates connected at a fine pitch is parallel to the long endless conveyor. Each of the short and long endless conveyors is arranged in a row separately at the front and rear of the table, and the short and long endless conveyors are configured to run in the direction of constant speed calculation, and the placed wood is placed at the upper transport lower part of each endless conveyor. A support member is provided to withstand the load and ensure horizontal direction, and the above-mentioned -
A band saw of a fixed band saw machine is interposed inside the space formed in the separation area of both short endless conveyors arranged in a row, and a band saw of a movable band saw machine is interposed outside. An automatic sawmill having a pair of band saws, characterized in that the wood transported using only an endless conveyor as a feeding means is directly sawn on both band saws.