FI97784C - Length limiter especially at a wood breaking 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 members then comprise, respectively, a substantially horizontal cutting condition with which the wood is pushed against the circular blade to cut the wood. The cutting crank further consists of a conventional, smooth steel plate feed chute with a side wall supporting the wood in the side direction and a bottom wall supporting the wood. The cutting of the wood takes place by moving the feed chute from the standby position to the cutting position, whereby the piece cut from the wood remains on the extension table on the other side of the circular blade. The extension table is generally made of steel plate in a shape almost corresponding to the feed chute, in which case it also consists of a side wall and a bottom wall. Conventionally, however, the bottom wall of the extension table is in a downwardly inclined position relative to the bottom of the feed chute, so that after the cutting situation 35 the piece of wood on it will certainly fall into the splitting chute below, e.g.

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 a normal wood-cutting situation, it is possible to use existing solutions that have been developed in terms of occupational safety with sufficient safety. In practice, however, a problem has been found in which the last remaining part of the cut tree 10 remains approximately the same length or slightly longer than the dimension set in the length limiter, due to the fact that the wood may come into contact with the blade when dropped. Such unintentional contact practically always causes an additional dangerous situation, which is why 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 measures.

The purpose of the length limiter according to the present invention is to provide a decisive improvement over the above-mentioned drawbacks and thus to substantially increase the state of the art. To achieve this purpose, the length limiter according to the invention is mainly characterized in that the length limiter comprises release means for allowing the piece of wood cut from the wood to move longitudinally forward, at least after the cutting situation.

35 The most important advantages of the length limiter according to the invention are its simplicity of construction and use, as well as its 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 the invention, 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 into the extension process in a controlled manner, 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 limiters at their simplest mechanically to operate independently 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.

Preferred embodiments of the length limiter according to the invention are set out in the dependent claims.

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In the following description, the invention will be illustrated in detail with reference to the accompanying drawings, in which Figures 1a and Ib show a preferred principle of operation of a length limiter according to the invention, Figure 2 shows a corresponding length 35 as a practical application, Figure 3 shows a length limiter according to Figure 2 shows a similar 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 tree 2 to be cut is arranged to be pushed by the feeding members 3, whereby after the cutting situation the tree 2 is arranged in the feeding members 3 to be moved forward in the longitudinal direction s 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 release means 5 for allowing the piece of wood 2 'cut from the wood 2 to move in the longitudinal direction s at least after the cutting situation.

The length limiter according to the invention is particularly suitable for use in a wood cutting machine according to Figures 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, preferably in a uniform position, which consists of a side wall 3a 'and a bottom wall 3a ".

The tree 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), the feed members 3 further preferably preferably moving at least partially together with the feed chute 3a, in a horizontal position and preferably uniform and nearly similar in shape of the discharge chute 3b (Figures 3 and 4) ·

A preferred embodiment is a length limiter P

the release members 5 are arranged in the standby position I of the feed members 3 to restrict the longitudinal s forward movement of the wood 2, as in Figures 1a 97784 and 3, and in the cutting position II of the feed members 3 to allow the longitudinal s s

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.

In a preferred embodiment, the release members 5 further comprise mechanical 5a, pressure medium and / or electrically actuated actuators for moving the movement 20b belonging to the release members 5 from the non-moving position I 'of the wooden body 2' to its non-moving position II '.

In the preferred embodiment shown, the release members 5 comprise a movement limiter 5b in connection with the side wall 3a 'of the feed chute, which is preferably arranged to be movable by spring force 5a' in the drawings, preferably by partially self-acting actuators. 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 comprise, for example, as shown in Fig. 2, a frame shaft 5c supported by two support points X1, X2 on the side wall 3a 'of the feed chute 3a, which is arranged to pivot about its longitudinal axis a2. In a further preferred embodiment, the motion limiter 5b is preferably fixed by means of fastening members 5d 6 97784 in the longitudinal direction s to said frame shaft 5c. In this case, in order to enable the release members to operate independently, a drive arm 5e is further attached to the body part 5c for turning 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 5a 'to keep the movement limiter 5b in the blocking position 1' and on the other hand preferably rotated to the unobstructed 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 to the body part 5c by means of a screw lock 5d. A further preferred embodiment is that the length scale 4a belonging to the adjusting members 4 25 is arranged in the feed chute 3a, preferably in connection with the movement restrictor 5b, i.e. in the side wall 3a 'of the feed chute below the body part 5c, as can be seen e.g.

It is clear that the invention is not limited to the above-described or described applications, but can be considerably modified within the framework of the basic idea, since the length limiter can be implemented, e.g. mechanically, in a wide variety of ways. 35 The absolute advantage of the proposed construction is its extreme simplicity and, at the same time, operational safety, in which case it is available on the one hand. automatically or, on the other hand, in certain situations 7 97784 (e.g. Figure 4) manually. Of course, the release means can also be implemented, for example, by using auxiliary devices or motors operated by auxiliary power, in which case, however, a more complex construction and automation as described above is required, for which reason it is not possible to obtain a similar application. In addition, more complex implementations easily pose risks to the reliability of the device, in particular due to unfavorable conditions, such as fouling, freezing, rusting, etc. due to dust and moisture.

Claims (10)

97784 Claims; A length limiter, in particular in a wood cutting machine, the wood cutting machine comprising a cutting member (1) against which the wood (2) to be cut is arranged to be pushed by feed members (3), the wood (2) being arranged in the feed members (3) in the longitudinal direction (s). ) for advancing 10 to cut it from the next cutting point, the length stop belonging to the wood cutting machine being intended to limit the length of the piece of wood (2 ') to be cut from the wood (2) to a length adjustable preferably by adjusting means (4), characterized in that the length stop (P) 5) to allow the piece of wood (2 ') cut from the wood (2) to move in the longitudinal direction (s) forward at least after the cutting situation. A length limiter in a wood cutting machine according to claim 1, wherein the cutting member (1), such as a circular blade or the like, is arranged in a substantially vertical position, the feed members (3) comprising a substantially horizontal feed chute (3a) or the like consisting of a side wall (3a1). ) and a bottom wall (3a "), wherein the wood (2) is arranged to be cut by moving the feed chute (3a) from the standby position (I) to the cut-off position (II), the feed members (3) 30 preferably preferably at least partially cooperating with the feed chute (3a). , in a substantially horizontal position, and preferably in a continuous outlet trough (3b) or the like, consisting of at least a side wall (3b ') and a bottom wall (3b "), characterized in that the release members (5) of the length stop (P) are arranged at least 3) in the standby position (I) the longitudinal movement (s) of the tree (2) forward ra and in the cutting position (II) of the feeding members 97784 (3) to allow the longitudinal movement (s) of the piece of wood (2 ') to be cut from the wood (2). Length limiter according to claim 1 or 2, wherein said feed chute (3a) or the like is arranged together preferably with the discharge chute (3b) or the like from the standby position (I) to the cut-off position (II), wherein at least the leading edge of the feed chute (3a) is brought into connection with the cutting means (1), for movement, preferably by turning said troughs (3a, 3b) about a substantially longitudinal axis (s), characterized in that the release means (5) are arranged substantially in connection with the supply means (3), such as a feed chute (3a) or the like and / or an outlet chute (3b) or the like. Length limiter according to one of the preceding claims 1 to 3, characterized in that the release members (5) comprise mechanical (5a), pressure medium and / or electrical actuators for moving the movement limiter (5b) belonging to the release members (5) to the piece of wood (2 '). ) from its non-moving position (I ') to its non-moving position (II'). Length limiter according to one of the preceding claims 1 to 4, characterized in that the release means (5) comprise at least one motion limiter (5b) arranged at least in part in connection with feed means (3), such as the side wall (3a ') of the feed chute (3a). self-acting institutions, such as spring-loaded (5a ') mobile. 35 Length limiter according to Claim 4 or 5, characterized in that the release members (5) comprise at least one pivotable member (3), such as the side wall (3a1) of the feed chute (3a), pivotable, such as hinged, articulated and / or correspondingly attached, a motion limiter (5b). Length limiter according to Claim 6, characterized in that the release members (5) comprise a body part supported by at least one, preferably two, support points (X1, X2) on the supply members (3), such as the side wall (3a ') of the feed chute (3a). (5c), such as 10 shafts or the like, arranged to rotate about a longitudinal axis around the lens (a2) (w). Length limiter according to one of the preceding claims 4 to 7, characterized in that said motion limiter (5b) is fastened, preferably by fastening means (5d), to a longitudinally (s) displaceable body part (5c), such as a shaft. or the like, wherein in order to allow at least an independent operation of the release members (5), a drive arm (5e) is further attached to the body part (5c) for turning the movement limiter (5b) by rotating the body part (5c) from the blocking position (I ') position (II ') or vice versa. Length limiter according to one of the preceding claims 4 to 8, characterized in that the drive arm (5e) in the body part (5c) belonging to the release members (5) is arranged on the other hand by a spring (5a ') or the like to hold the movement limiter (5b) (I1) and, on the other hand, preferably under the influence of a fixed frame (R) belonging to the wood cutting machine, such as when moving the feed members (3) to the cutting position (II), turn the movement limiter (5b) to the unobstructed position (II '). Length limiter according to one of the preceding claims 7 to 9, characterized in that the adjusting means (4) for adjusting the length 35 97784 of the piece of wood (2 ') to be cut are preferably arranged by fastening the movement limiter (5b), such as a screw, bayonet and / or fastening members (5d) operating on a corresponding principle to the body part (5c), 5 and / or that the longitudinal scale (4a) belonging to the adjusting members (4) is fastened to the feed members (3), substantially in connection with the movement limiter (5b), preferably ') below the body part (5c). 97784 Patentkrav;