JPH01310901A - Reciprocating sawing device - Google Patents

Abstract

PURPOSE:To perform highly efficient and precise sawing actions by a method wherein two band-sawing machines are disposed in an array and the directions of the sawing actions of the machines are set in opposite to each other. CONSTITUTION:A forward course cut band-sawing machine 1A and a backward course cut band-sawing machine 1B are provided. The teeth 18a of a forward course band-saw blade 17a are made to face the sawing start side of the forward course, while the teeth 18b of a backward course band-saw blade are made to face the base end of the backward course sides. When the sawing is intended, only the forward course cut band-sawing machine 1A is put into action. When the reciprocating cut is intended, firstly, in the forward course, the sawing is done at first with the forward course cut band-saw machine. In the backward course, before the running of a carriage truck 30 so as to be sent back from the position of the completion of the forward course cut, the backward course cut band-sawing machine 1B side approaches the carriage truck 30 side, while the forward course cut band-sawing machine 1A is set to its retreated position.

Description

[Detailed description of the invention] (Purpose of the invention) <Industrial application field> The present invention relates to a reciprocating sawmill device.

<Background of the Invention> Conventionally, a reciprocating band saw machine has been used which performs sawing in both the forward and return strokes each time the sawn material is moved back and forth. This blade uses a band saw blade that has teeth formed on both sides of the band-shaped base material as a saw blade that is commonly used in band saw machines, so that the band saw blade acts on both the forward and backward sawing operations.

Conventionally, the following disadvantages have been pointed out due to such a method. The first point is that, as shown in Figure 6 (a), teeth for reciprocating sawing are formed on both sides of the band-shaped base material, and the teeth on both sides wear out at the same time, resulting in severe wear and tear on the band saw blade. There was a problem. That is, generally, each time the tooth tip of a band saw blade becomes worn out, it is re-carved and used for correction many times until the width of the base material is reduced to a certain cumulative value. However, when this progresses from both sides, the width of the base material of the band saw blade is significantly reduced, resulting in a shortened lifespan of the band saw blade.

The second problem is the problem of so-called "fogging" of the bandsaw blade, which causes irregularities in the thickness dimension setting and the heel length when sawing the material. Hitoko's "cover"
The phenomenon is as shown in FIG. 6(b) when the upper and lower saw wheels 15'
, 16'), when the band saw blade 17' is extended, the saw wheel 15'
, 16', the teeth 1 on the band saw blade 17' are not directly supported on the bandsaw blade 17'.
This refers to the tendency for the tip end near 8' to face inward so as to cover the grass, and therefore the position of the base metal part of the band saw blade 17' and the position of the tooth 18' are slightly shifted, and the base metal Rank W
(As a result, if the walking position is combined at the common tangent line W of the outer diameter of the upper and lower grasses 15' and 16'), the walking dimension becomes incorrect. Of course, this kind of phenomenon can be almost avoided if the walking position is aligned with the tip of the tooth, but in reality, the position of the tip of the tooth may differ each time the work is done, or even during rotation, so it is not always possible to accurately Setting is difficult at the tip of the tooth.

The third point is that due to this "fogging" phenomenon, a phenomenon called "bent nose" occurs in the road. That is, this "nose bending" phenomenon is as shown in Fig. 6 (C), where the sawn material 2' is first split in the direction in which the teeth are actually facing, creating a bent sawn line 1o. This is a phenomenon in which, after being cut to a certain extent, the cutting path returns to the normal cutting path and becomes stable. In order to avoid this, the material feeding speed must be slowed down, which undeniably reduces work efficiency.Although this reciprocating bandsaw machine was originally designed for high efficiency, its advantages cannot be achieved. The result was that it was destroyed.

Technical matters for which development was attempted> The present invention was made in view of this background, and
In any case, the conventional technique of using a single band saw blade to perform both reciprocating and reciprocating sawing operations cannot fundamentally solve the problem, so one-sided sawing, which allows for more accurate sawing, A regular band saw is placed specifically for sawing on the outbound side and sawing on the return side, and when one band saw is used, the other band saw is sufficiently moved away so that each can be done. This is an attempt to develop a new reciprocating lumber sawing machine that can function exclusively.

(Structure of the Invention) <Means for Achieving the Object> That is, the reciprocating sawmilling device of the present invention is a sawmilling device comprising a material feeding device and a band saw, in which at least two band saws are installed in parallel and mutually connected. This is characterized in that the direction of the grinding action is set in the opposite direction.

In addition to the above-mentioned requirements, the second invention of the present application is characterized in that each band saw is arranged oppositely so that the teeth of the band saw blades face each other when the sawing and splitting action positions are set in opposite directions. It is.

These inventions attempt to achieve the above object.

<Operation of the Invention> The present invention has two band saw machines for forward sawing and two band saw machines for backward sawing which are installed independently in parallel. The purpose is to perform a highly efficient and accurate sawing operation while avoiding the disadvantages of a basic reciprocating sawing band saw.

<Examples> The present invention will be specifically described below based on illustrated examples. First, the reciprocating lumber sawing apparatus according to the present invention includes a band saw 1 that directly performs sawing operations, and a material feeding device 3 for conveying sawn material 2.

First, let's talk about the bandsaw machine 1 that directly performs sawmilling operations.This machine consists of at least a reciprocating sawing band saw IA and a returning sawing band saw I.
1B, each having a different direction of sawing action. However, since both basically have the same configuration, the specific explanation of each part will be explained in common below, and if it is necessary to explain each part separately, we will refer to the band saw for forward sawing. IA, if Identification codes of alphabets A and B are displayed in addition to basic numerical codes, such as road sawing band saw IB. First, the bandsaw machine 1 is mounted on a base frame 10, and the machine frame 1) is slidably supported on the base frame 10. This machine frame 1) is composed of a table machine frame 12 provided in the lower part and an upper grass machine frame 13 formed in a substantially upright state above the table machine frame 12. The machine frame 1) is screwed together in the table machine frame 12 with a walking screw 14 driven by a walking motor M1 attached to the base frame 10, and slides back and forth according to the rotation of the walking motor M. It is configured as follows. For such a machine frame 1), an upper dew grass 15 and a lower dew grass 16 are provided,
A band saw blade I7 is suspended for each of these upward and downward advances 15.16. The undergrowth 16 is rotatably supported by a bearing 21 disposed approximately in the center of the table machine frame 12, but its mounting position itself is fixed. Rotation is transmitted to the lower grass 16 by a belt 19 from a drive motor M2 provided on the back side of the upper grass machine frame I3. On the other hand, the support mechanism for the top-row grass 15 will be explained. This mechanism is supported by an elevating support body 20 which is attached to the top-row grass machine frame 13 so as to be slidable up and down. As shown in FIG.
It is supported via a slide block 23 that is slidably attached to two slide rails 22 provided vertically in parallel on the front surface of the saw. The armature 15 is configured so that its position can be adjusted in the vertical direction with respect to the machine frame 1). The lifting support 20 is cushioned and supported by an air bag 24 below. Although not shown in the drawings, the air bag 24 is constructed so that a predetermined air pressure can be supplied through appropriate piping. This embodiment shows the first embodiment in which the top 15 used to apply the present invention is of a so-called cantilever type, but the present invention is not necessarily limited to this cantilever type. isn't it.

The characteristic configuration of the present invention is that the teeth 18 on the band saw blade 17 are formed at different positions in the two-way forward sawing band saw IA and the one-way sawing band saw SIB. Specifically, the teeth 18a on the band saw blade 17a of the band saw blade 17a for forward sawing are formed toward the sawing start side of the outward path, and the teeth 18a of the band saw blade 1 of the band saw machine IB for backward sawing are formed toward the starting side of the outward sawing.
The tooth 18b of 7b is formed facing the base end on the return path side,
At least both are arranged so that their cutting action directions are different. Preferably, the teeth 18a and 1.8b are set to face each other. The embodiment of this band saw machine 1 has already been filed by the applicant in a patent application filed in 1986-1.
No. 3427 "Obi tM S J" is an air tension type that has already been proposed, and has been praised for its excellent cutting performance, but it can also be used with conventional band saws and other appropriate products. Of course it is possible.

Next, a description will be given of the feeding device 3 installed next to the sawmill.This device can be applied with a conventionally known material feeding vehicle.First, the material feeding vehicle 30 is a sawmill equipped with two bandsaws, which are sawmill devices. The wheel 3 is attached to the main stand 32 and runs on the sending vehicle rail 31 attached to the side of the vehicle 1.
3 rolls and travels back and forth. A scraper device 34 for holding the sawn material 2 is provided on the chassis 32, and several units, three in this embodiment, are mounted on each chassis. On the other hand, the upper sludge 36 and the lower sludge 37 are supported so as to be freely retractable and protrude from the ground via the holder 38, and to be movable up and down in the vertical direction. Of course, this lifting and lowering operation is not shown in the drawings, but the lifting and lowering movement is carried out using a cylinder mechanism, rack and pinion mechanism, etc. as appropriate.
They perform actions such as appearing and reappearing, and driving in scorpions.

This scraper device 34 is equipped with a hentos dock 39 for positioning the sawn material 2 with respect to the sawing path. The mechanism for running the material transport vehicle 30 may be any conventionally known means as appropriate; for example, as shown schematically in FIG. 4, a winding drum driven by a material transport motor M3 is used. 40 is installed as a basic example, a driving cable 41 is wound thereon, and its end is fixed to the chassis 32 to run the material transport vehicle 30. Furthermore, as an auxiliary device of the present device, For example, a take-out conveyor 50 for taking out a part of the sawn sawn material 2 is provided near the roadside on the outgoing route, and a return conveyor 51 is further provided to bring the material conveying vehicle 30 almost from the outgoing route's sawed and split start position side to the take-out conveyor 50 side. It is formed along the running trajectory. In this case, depending on the setting position of the bandsaw machine 1, which is a sawmilling device, the sawn portion 2a on the return trip may be sent passing through the pocket of the band saw i1.

The reciprocating lumber sawing device of the present invention has the specific structure as described above, and operates as follows. Of course, this sawing action itself is almost the same as that of a conventional bandsaw machine, so the explanation will be kept brief, but the point is that the sawn material 2 is held by the scraper device 34 in the material conveying car 30 and is made to travel. Appropriate sawing and splitting is performed using a band saw blade 17 of a band saw machine I located approximately in the center of the splitting track 1. This grinding effect will be explained in various forms below.

i) Rough separation work For example, if the sawn wood 2 is in the shape of a raw wood log and is to be roughly cut into roughly half as shown schematically in Figure 5(a), first the outgoing sawing process is performed. The sawn and split material 2 is held on the splitting start side, and the material transport vehicle 30 is run from here to perform sawing and splitting.

At this time, it is only necessary to act on the forward sawing band ff1ffilA, so for example, the backward sawing band saw IB is sufficiently moved away so that it does not interfere. Such sawing itself is no different from a conventional one-sided sawing band saw.
If you want to grind the side further on the return trip, use the obi cap L for the outward trip.
A is sufficiently moved away, and the return sawing band saw IB is pushed toward the material transport vehicle 30 side, and the sawing is carried out by walking according to predetermined instructions. In addition, in the case of unidirectional sawing using only 'AIA for the outgoing sawing belt, when returning the sawn material 2, use the material transport vehicle 3.
0 is equipped with a so-called clutch mounting surface, and a mechanism is adopted in which the part of the chassis 32 is shifted relative to the wheels 33 away from the road on the return trip, but in the present invention, it is the opposite. By slightly moving the reciprocating sawing band saw tA from the original sawing path, the sawn material 2B remaining after sawing is removed.
It is also possible to prevent looseness between the band saw blade 17a and the band saw blade 17a. Of course, there is no problem in itself even if a conventional type in which the chassis 32 side is withdrawn is applied. In addition, in either case of reciprocating, the other obi cap 1 that is not working at the time of sawing
The band saw blade 17 and the sawn material 2 are set within a safe range in order to prevent 7itE, but specifically, it is sufficient to set this to a range of about 10n to several ion.

ii) Reciprocating sawing workIn the case of reciprocating sawing as shown in FIGS. 5(b) and 5(c), first, on the outward trip, the sawn material 2 cut into quarters is passed through the scraper device at 34°C in the material transport vehicle 30. For example, first, sawing is performed using a band saw IA for forward sawing. The plate-shaped sawn material 2a is taken out from the take-out conveyor 50 as it is. When grinding on the return trip, the material transport vehicle 3
Prior to this, the band saw ff11B side for return sawing approaches the material transport vehicle 30 side, and the band saw machine IA for outward sawing is set at a position sufficiently retreated from the sawing and splitting track to the extent that it does not interfere with it. The head stock 3
Set by shifting 9, the board material is further sawed at a constant walking distance on the return trip tlJL road. Of course, the sawn material 2a is placed on the return conveyor 51 to be taken out from the take-out conveyor 50, and this is moved to the position of the take-out conveyor 50 to perform the sawing. This movement is performed by the band saw machine 1 for outward sawing. It runs through the gap between A and the return sawing bandsaw IIB. tjfJ Each of these steps may of course be performed by an automatic program controlled by a microcomputer, etc., or may be performed by a manual program.In addition to stepwise step setting, stepless step setting, automatic stepless step setting, etc. may be performed as appropriate. It is also possible to incorporate known labor-saving techniques.

(Effects of the Invention) As described above, the present invention provides a sawmill for reciprocating sawing,
Since forward sawing and return sawing are performed using dedicated band saws, various problems that conventional single-unit reciprocating band saws have, such as the problem of saw blade wear and the problem of saw blade "fogging", are avoided. The problem of uneven output, the path is crooked at the beginning.
This solves the problem of "heavy encircling" and enables highly efficient and accurate sawing.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the reciprocating sawmill of the present invention, Fig. 2 is a front view of the same, Fig. 3 is a plan view of the same, Fig. 4 is a side view showing a part of the above, and Fig. 5. 6 is a plan view schematically showing various aspects of reciprocating sawing work, and FIG. 6 is an explanatory diagram showing a conventional example in which teeth are formed on both sides of a strip base material for reciprocating sawing, and its problems. 1: Band saw machine IA: Band saw machine 1B for forward sawing; Band saw machine 2.2a, 2b for backward sawing; Split material 3; Material feeding device 10 = base frame 1); Machine frame 12; Table machine frame 13; Top Opening machine frame 14; walking screw 15; upper opening 16; lower opening 17.17a, 17b; bandsaw blade 18.18a X1ab; tooth 19; belt 20; lifting support 21; bearing 22; slide rail 23; slide block 24 air hang 30; material transport vehicle 31; material transport vehicle rail 32; chassis 33; wheels 34; sludge device 35; column 36; upper sludge 37; lower sludge 38; holder 39; head stock 40; Cable 50; Take-out conveyor 51; Return conveyor Ml; Walking motor M2; Drive motor N13; Material feeding motor

Claims (2)

[Claims] (1) In a sawmill comprising a material feeding device and a bandsaw machine, at least two bandsaws are installed in parallel, and
A reciprocating saw sawing device characterized in that the mutual sawing action directions are set in opposite directions. (2) The reciprocating saw sawing device according to claim 1, wherein each of the band saws is arranged oppositely so that the teeth of the band saw blades face each other when the sawing operation positions are set in opposite directions.