FI97784B - Length limiter particularly in a timber cutting machine - Google Patents

Description

97784

Length limiter especially in wood cutting machine

The invention relates to a length limiter, in particular in a wood cutting machine, the wood cutting machine 5 comprising a cutting member against which the wood to be cut is arranged to be pushed by feed members, whereby after cutting the wood is arranged in the feed members to be moved longitudinally forward to cut from the next cutting point. The length limiter included in the wood-cutting machine 10 is intended to limit the length of a piece of wood to be cut from wood to a length that is preferably adjustable by adjusting means.

15 A wood cutting machine of the type described above is used, for example, as one part of a so-called chippers. In this case, the wood cutting machine usually has a circular blade in the vertical direction, which cuts the wood into pieces of suitable length. The feed member then comprises, respectively, a substantially horizontal cutting condition with which the wood is pushed against the circular blade to cut the wood. The severance condition is still formed. normally made of single, smooth steel plate • · ·: ·· | made of a feed chute with a side wall • · · * · "25 supporting the wood and a support wall supporting the wood. is usually made of steel plate almost in the same shape as the feed chute: in a shape in which it also consists of a side wall and a ··· · bottom wall. · * ... 35 the piece of wood on it would certainly fall into the splitting chute below, for example.

• ·· * «·· • · • · ·« 2 97784

Wood cutting machines of the type mentioned above currently use a fixed length limiter, which is used to limit the length of the pieces to be cut from the wood as desired.

5

In its usual wood cutting situation, it is possible to use existing solutions developed in terms of occupational safety with sufficient safety. In practice, however, a problem has been found in which the last part of the cut wood 10 remains approximately the length of the sauna or slightly longer than the length set in the length limiter, due to the fact that the wood may touch the blade when dropped. Such unintentional contact practically always causes an additional dangerous situation, for which reason the user of the machine must pay special attention to such situations and monitor / control the fall of the last piece of wood from the extension table. Therefore, this naturally poses a danger to both the machine operator and the 20 rotary blades. Damage to the circular blade always causes a relatively long interruption to work and, of course, additional maintenance and repair work. measures.

The length limiter according to the present invention has the purpose of providing a decisive improvement over the above-mentioned drawbacks and thus substantially raising the state of the art. To achieve this object, the length limiter according to the invention is mainly characterized in that the length limiter. the waterer includes release members of the wood truncated. ··, ♦. to allow the piece of wood to move forward in the longitudinal direction, at least after the cutting situation.

The main advantages of the length limiter according to the invention are its construction and use. simplicity and operational reliability, in which case the invention • also plays a significant role in improving work productivity and 3,97784 occupational safety. When using the length limiter according to Inventor *:, the use of a cutting machine is safer than current cutting machines, in particular because it makes it possible to feed the end pieces of cut trees in a controlled process to the extension process, which is no longer necessary with a circular blade. In this case, the cutting machine works perfectly in all respects, so that the movable length limiter 10, which moves to a position that does not prevent longitudinal movement of the piece of wood, always allows the cut pieces to move in a controlled manner without the malfunctions characteristic of traditional solutions. By arranging the length limiter at its simplest to be mechanically operated in connection with the side wall of the feed chute, the invention can be applied in other respects to conventional cutting machines by making the necessary minor changes to the feed chute.

The dependent claims set out. preferred applications of the length limiter according to the invention.

In the following description, the invention is illustrated in detail by reference to the accompanying drawings, in which Figures 1a and Ib:. *. show a preferred operating principle of a length limiter according to the invention, Fig. 2 shows a length limiter operating on a similar principle in a practical application, »• · ♦. ***. Fig. 3 shows the length limiter according to Fig. 2 in the blocking position, and 4 97784 Fig. 4 shows the corresponding application in the unobstructed position.

The invention relates in particular to a length limiter for use in a wood cutting machine 5. The wood cutting machine comprises a cutting member 1 against which the wood 2 to be cut is arranged to be pushed by the feeding members 3, whereby after the cutting situation the wood 2 is arranged to be moved forward in the longitudinal direction s to the cutting member 3 to cut it from the next cutting point. The length limiter belonging to the wood cutting machine is intended to limit the length of the piece of wood 2 'to be cut from the wood 2 to a length which is preferably adjustable by the adjusting members 4. The length limiter P 15 comprises vapair: rails 5 to allow the piece of wood 2 'cut from the tree 2 to move in the longitudinal direction s forwards at least after the cutting situation.

The length stop according to the invention is particularly suitable for use in a wood cutting machine according to Fig. 1a-4, the cutting member 1 of which, such as a rotary blade, is arranged in a vertical position. In this case, the feed members 3 comprise a feed chute 3a in a horizontal position *** 1, preferably in a uniform position, which • · · ** * 25 consists of a side wall 3a 'and a bottom wall 3a ".

• ·:: The wood 2 is then arranged to be cut by moving the feed chute 3a from the standby position I (Fig. 1a) to the cut-off position II (Fig. Ib), whereby the feed members: · · 3 also preferably belong at least partially together 30 a discharge chute 3b movable with the feed chute 3a, in a horizontal position and preferably uniform and almost identical in shape to the feed chute ··· · (Figures 3 and. *. 4).

• · · • ·· • · • ·

\. · 35 A preferred application is the length limiter P

· ** .. the release members 5 are arranged to limit the longitudinal e movement of the wood 2 in the stopping position I, as is the case in Figures 1a 5 97784 and 3, and in the cutting position II of the feeding members 3 the piece of wood to be cut from the wood 2 2 'to allow longitudinal s to move forward, as is the case in Figures Ib and 4.

5

As a further preferred embodiment, with particular reference to Figures 2-4, the feed chute 3a is preferably arranged together with the outlet chute 3b for moving said chutes 10a, 3b about the longitudinal axis s1 from the standby position I to the cutting position II. In this case, the front edge of the feed chute 3a is in the cutting position II substantially in connection with the circular blade 1. In the preferred embodiment shown in Figures 1-4, the release members 5 are arranged to be integral with the side wall 3a 'of the feed chute 3a.

The preferred embodiment further comprises mechanical release devices 5a, pressure medium and / or electric actuators 5 for moving the moving guide 5b belonging to the release members 5 from the non-moving position 1 'of the wooden body 2' to its non-moving position II '.

♦ • · · • · ·

In the preferred embodiment shown, the release means 5 comprise a motion limiter 5b in connection with the side wall 3a 'of the feed chute, which is preferably arranged with partially self-acting actuators, i.e. in the drawings spring-loaded 5a'. · · • V: to move. In this case, the release members 5 comprise a movement limiter 5b pivotable in connection with the side wall 3a 'of the feed chute 3a, i.e. * hinged to it.

• · · · • · · *. As a preferred embodiment, the release members 5 • · # '♦ **, e.g. as shown in Fig. 2, comprise a frame shaft 5c supported on the side wall 3a' of the feed chute 3a • · '• ** 35 from two support points X1, X2, arranged around its longitudinal axis a2. ***: convertible w. In a further preferred embodiment, the motion limiter 5b is preferably fixed to said frame shaft 5c in the longitudinal direction s by means of fastening members 5d 6d. In this case, in order to allow the release members to operate independently, a drive arm 5e is further attached to the body part 5c to turn the actuator 5b by rotating the body part 5c from the blocking position 1 'to the unobstructed position II' or vice versa.

In particular, according to the operating principle 10 shown in Figures 1a and Ib, the drive arm 5e in the body part 5c belonging to the release members 5 is arranged on the one hand by the spring 5a1 to keep the movement limiter 5b in the blocking position I 'and on the other hand preferably rotated by the fixed frame R to position II '. In this case, the release members 5 operate in a so-called automatically because the motion limiter 5b turns at the same time as the feed chute 3a is moved to the cut-off position II.

In the embodiment shown in the drawings, the adjusting means 4 for adjusting the length of the piece of wood 2 'to be cut are thus arranged by fixing the movement. stop 5b with screw locking 5d to the body part 5c.

A further preferred embodiment is a length scale 4a belonging to the adjusting members 4 • »• · · * · 2 25 placed in the feed chute 3a: preferably in connection with the movement limiter 5b, i.e. in the side wall 3a1 of the feed chute below the body part 5c, • · • '· · which can be seen, for example, in Figure 2.

• · · 1 • · · s:: 30 It is clear that the invention is not limited to the above or explained applications, but it can be modified considerably within the framework of the basic idea, since the length limiter can be implemented e.g. .

* · ♦ ’· mechanically to work in very many ways.

: ... 35 The absolute advantage of the presented construction is its extreme t1- .. simplicity and at the same time safe operation. 2 .1 · 1. on the other hand, it is available on the so-called

automatically or, on the other hand, in certain situations -v.spr r'r, .w ^ ~ \ '· <Γ' "- / '7 97784 (e.g. Fig. 4) manually. Of course, the release means can also be implemented e.g. by auxiliary devices operated by auxiliary power, or However, more complex designs than those described above and automation are required, which makes it impossible to achieve a cost-effective application, and more complex implementations easily pose risks to the reliability of the device, especially due to adverse conditions such as dust and moisture. due to freezing, rusting, etc.

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Claims (10)

1. A length limiter, in particular, on a wood interrupting machine, the wood interrupting machine belonging to a interrupting means (1) against which a wood (2) to be interrupted is arranged to be pushed by means of inerting means (3), whereby after the interrupting situation the wood (2) is arranged to be moved forward in the longitudinal direction (s) at the feed means (3) to interrupt the same from a subsequent interrupting site, wherein a wood interrupting machine associated with the length limiter is intended to limit the length of a wooden piece (2 '). shall be interrupted from the wood (2), to a length which is preferably adjustable by means of regulating means (4), characterized in that the length limiter (P) belongs to the freedom means (5), to enable the piece of wood (2) interrupted by the wood (2). 2 ') frontal movement in the longitudinal direction (s) at least after the interruption s situation. 20 2. A length limiter according to claim 1 in a wood cutting machine, whose cutting means (1), such as a knife disc or the like, is arranged in a substantially:, ·. a vertical position, wherein the inlet means (3) comprise a substantially, preferably uniformly inlet chute (3a) or «t ··· *, which is formed by at least one side wall (3a). 3a *) and ·· * a bottom wall (3aM), wherein the wood (2) is arranged to::: be interrupted by moving the feed trough (3a) from a standby stand (I) to a standoff stand (II) , wherein the feeding means (3) comprise therewith a, preferably at least partially in connection with the feeding channel (3a) movable, preferably in one! substantially horizontal position positioned and substantially uniform, removal channel (3b) or the like, which is formed at least by a side wall (3b ') and a bottom Y: wall (3bN), characterized in that , the freedom limiter (5) of the length limiter (P) is arranged to limit the movement of the wood (2) freely in the longitudinal direction (s) at least during the readiness count (I) of the input means (3) and to enable it of the wood (2). interrupted movement of the piece of wood (2 *) forwards in the longitudinal direction (s) during the interrupting count (II) of the feed means (3). The length limiter according to claim 1 or 2, wherein said inlet chute (3a) or the like is arranged to move preferably together with the removal chute (3b) or the like from the stand (I) to the interrupt position (II), where at least the inlet chute (II) 3a) the leading edge has been replaced substantially in connection with the interrupting means 15 (1), preferably by turning said gutters (3a, 3b) around substantially in the longitudinal direction (s) an existing shaft (ai), characterized in that the freedom means ( 5) are arranged substantially uniformly with the feeding means (3), such as with the feeding channel (3a) or the like and / or the removal channel (3b) or the like. 4. A length limiter according to any of claims 1 to 3, characterized in that the freedom of movement. The means (5) belong to mechanical (5a), pressure medium driven ·· * and / or electrical means, to move a freedom of movement (5) associated with motion limiter (5b) from a ··· * wooden piece ( 2 *) motion preventing position (I *) • · to its motion preventing position (II *). ···. · *: 30 A length limiter according to any of claims 1 to 4, characterized in that the freedom means (5) belong to at least one in connection with the first input means (3), in connection with the input channel. (3a) sidewall (3a ') existing limitation of movement (5b), which is arranged movable by means of at least partially self-acting, such as by means of the spring force (5a *) operating means. ··· 97784 The length limiter according to claim 4 or 5, characterized in that the freedom means (5) belong to At least one, reversibly in connection with the feeding means (3), as arranged with the side wall (3a ') of the feeding groove (3a), such as thereto, in a pivotable, joined and / or corresponding manner, motion limiter (5b) is joined together. 7. A length limiter according to claim 6, characterized in that the freedom means (5) belong to an inlet means (3), such as to the side wall (3a ') of the inlet channel (3a) at At least one, preferably at two support points (X1, X2). ) supported stem portion (5c), such as a shaft or the like, which is arranged to turn (w) about its longitudinal axis (a2). Length limiter according to any of the above claims 4-7, characterized in that said movement limiter (5b) is fixed, preferably by means of fastening means (5d) pk, a longitudinally movable way to the longitudinal (s). existing stem portion (5c), such as the shaft or the like, wherein At least to enable the means of freedom; . ·. (5) self-acting, to the stem portion (5c) bar »e · * Γ A support arm (5e) is also attached to the movement limiter (5b) by rotating (w) the stem portion (5b). 5c) e · · · “/ fr In the preventive position (I ') to the e · * * .. ♦ * of the preventive position (II *) or in the opposite way. • · • · * • · · ··· · • ·· * 30 9. A length limiter similar to any of the above claims 4 to 8, characterized in that the use arm (5e) located in the freedom means (5) ··· belonging to the stem part (5c) is arranged on one side e 1. positioning the motion limiter (5b) in the preventive position (I1) by means of a spring (5a ") or ♦ · * ··· * such and A, on the other hand, to reverse the motion limiter (5b) preferably by the action of a wood interruptor (***) associated with fixed support (R) to the ··· 97784 non-preventive position (II *), for example, when the input means (3) are moved to the interruptor (II) * 5 Length limiter according to any of the above claims 7-9, characterized in that the control means (4) for controlling the length of the wood piece (21) to be interrupted are arranged by attaching the movement limiter (5b) by means of a fast-closing principle, such as with the screw, bayonet and / or the corresponding principle, the fastening means (5d) of the stem part (5c) and / or that a longitudinal scale (4a) of the control means (4) is attached to the input means (3) , substantially in connection with the movement limiter (5b), preferably below the stem portion (5c) in the side wall (3a ·) of the feed chute. »M