FI104541B - Device to improve working safety when chopping wood - Google Patents

Abstract

A device to improve working safety when chopping wood, comprising a shield-shaped guard element 1, which is fixed to the side of a chopping block or other type of base and which is intended to protect the person chopping wood when he misses with the chopping implement. The shield-shaped guard element 1 is fixed to the chopping block in an inclined position by means of a separate base construction 2 and is adjustable. <IMAGE>

Description

104541

A device to increase occupational safety when chopping trees

The invention relates to a device for increasing occupational safety when chopping trees.

Typically, the axing of trees by hand with an ax is carried out by placing the log piece in an upright position on a massive log cut from the tree trunk, followed by a log. the piece of wood is cut with an ax in a known manner.

10 If the head of the tree to be chopped has not been cut sufficiently perpendicular, it will tend to fall.

Ko. there is quite a risk of injury when chopping. because the ax can ripple from the chopping tree or the chopping tree may fall down before the ax hits it. If the ax's blade does not stop at the tree to be chopped or at the log, it will inevitably continue its journey according to the laws of physics until it encounters a suitable obstacle, which in the worst case may be the lower limb of the chopper. j

When the ax is split, the pieces of wood to be chopped will typically fly from the log to 20 countries, so they must be re-placed on the log.

The present invention provides a technical solution to the aforementioned problems, while at the same time increasing the efficiency of wood chipping. Characteristic features of the invention are set forth in the appended claims.

25

The invention will now be described in more detail with reference to the accompanying drawings, in which certain embodiments of the invention are illustrated in no way. ·. matt.

30 Thus:

Figure 1 is a general view of tree chopping utilizing the invention; 2 104541

Fig. 2 shows in more detail the mounting base of the protective device according to the invention on the side of the halo log;

Figures 3 and 4 show alternatives for fastening the protective device 5 according to the invention to the substrate structure;

Figure 5 shows one alternative for adjusting the position of the protective means; Figures 6a to 6d show different shapes of the protective device; 10

Figures 7 and 8 show a solution according to the invention for retaining the wood to be chopped during the chopping operation;

Figure 9 shows a concrete example for retaining trees; and 15

Figures 10-12 illustrate various ways of providing a slot for the lashing loop.

In the invention, the lower limbs of the log splitter are protected by a sufficiently rigid shield 1, shown in Figure 1, which is capable of withstanding the ax but not damaging the ax blade, at a suitable angle and at a suitable distance to the chopping log or other 20.

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The attachment of the plate to the log is such that the vertical position of the plate, the setting angle and the distance from the log to 25 can be adjusted according to the wishes of the chopper.

^ Technically, this is accomplished as follows: Because the tree trunks are quite vague in shape, • the tripod is the easiest way to get a firm attachment to the side of the log. The three-leg base structure 2, Fig. 2, 30 is fixed to the side surface of the log and the plate 1 is in turn attached to the base structure 2.

The three-legged base structure can be easily and cheaply made, for example, from the metal plate referred to in Fig. 2, as shown in Fig. 2, consisting of a triangular plane 5 and three legs bearing it with ends 6 bent to the log surface and provided with holes 10 with cover screws 7 to the log as shown in Figure 2.

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In order to obtain sufficient rigidity for the base structure 2 laterally, it can be provided with stiffeners pressed into the plate and / or a plate 8 connecting the upper legs, as shown in Figure 2.

The shield 1 is secured at its lower edge by screws 13, Fig. 3 or 14, Fig. 4 to the above-mentioned substrate structure 2, whose plane surface 5 is provided with fastening holes 9 shown in Fig. 2 for screws 14 or otherwise, such as welding Fig. 3. The screws 14 are locked to the plane surface 5 of the base structure 2 by means of nuts 28.

15

The vertical mounting of the plate is made adjustable by making the mounting holes 15, Figures 3 and 4 in the plate 1, vertically long and locking the plate 1 by nuts 16 in the desired position.

20 The distance of the plate 1 from the log and the setting angle to the log can be adjusted with nuts 16.

The distance of the plate from the log and the setting angle can also be adjusted by placing an appropriate number of washers 17, bushes 18, wedge plate 19 shown in FIG. 5 and the mounting holes 29 made vertically long or by other suitable filling at the attachment points between the mounting surface 5 shield 1 in place by tightening the nuts 16 which are shown in Figures 3 and 4.

30 Technically, the shield may be made of a wood-based material such as plywood and plastic, reinforced plastic or similar material of relatively soft surface, or made of metal, for example a sheet of metal, to form a suitable shape, or other strong material protected by a plastic or so that any ax hits the shield will not damage the ax blade.

By making the plate a cross-sectional shape, as shown in Figures 6a, 6b or 6c, it is easy to obtain lateral guards on the plate. The plate also provides the same amount of material with additional stiffness directly relative to the plate, Figure 6d. To increase stiffness, abrasion resistance, and to eliminate variations in the thickness of the wood material caused by air humidity fluctuation in the panel mounting region, the panel 1 mounting region 2 may be made of a separate metal member or 10 other suitable material and secured to the panel 1.

The upper edge of the plate 1 is preferably provided with a gripping handle so that the log or other felling platform can be easily moved. The gripping handle can be made, for example, by machining an aperture suitable for the hand at the top of the shield. In addition, a protective cushion is provided in the required areas at the 15 edge of the plate.

Further, in accordance with the present invention, the chopping wood is supported on a log or similar support by means of upright supports 3 mechanically attached to its back edge and secured in place by a rubber tubing 4 or the like which retains its sufficiently rigid elasticity and is secured to its ends This is achieved by inserting the ends of the hose into a fork of the upper end of the uprights 3 having a width less than the diameter of the hose and parallel to the tang of the log and having a sufficiently circular cross-section to change its attachment length The attachment of the rubber hose or the like to the slot is generally illustrated in Figures 7 and 8.

The upper ends 20 of the forks of the uprights are shaped to a suitable shape so that the hose 4 can easily be manually pressed into a smaller fork; 30 and, on the other hand, the probability of hitting the ax blade perpendicular to the fork end would be minimal. In practice, for example, a paraboloid-like shape or a sufficiently rounded cone would be suitable.

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The vertical length of the forks must be at least such that, if necessary, both ends of the hose will overlap the fork. In this case, small diameter trees can be tied to one vertical support. The ends of the hose can then also be pressed against adjacent forks, whereby the hose clamping force is doubled.

The height of the fork, measured from the surface of the log or other logging surface, shall be such that the trees to be chopped can be tied with a rubber hose on average at approximately their midpoint.

10

A sufficiently rigid wall and resilient rubber hose or the like, used in the above manner to bind wood, is very resistant to the ax's impact because it is flexible due to its shape and resilience and because vertically it is attached only at the rear edge, which hits less frequently and movement also vertically with the ax striking the trailing edge.

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Wood splitting is enhanced because the splitting wood can be kept upright even if the head is skewed and on the other hand the chopped wood mass remains on the log 20 and in one pile to the end without having to lay down trees on the log after each stroke.

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Because the. the attachment head can never be tightened too tightly, the wood pulp can also be easily rotated to a new position during the splitting operation, allowing the entire wood to be easily chopped into pieces of suitable size.

Technically, the abovementioned vertical supports can be made of suitable plastic, reinforced plastic, wood or similar material or made of metal or other strong material. material upright support structure and protecting it from the necessary areas with suitable 30 plastic or other soft material to prevent possible ax hits to the upright from damaging the ax blade.

Fig. 9 shows one way of implementing the upright and its fork structure.

6 104541

In it, the fork is made of two metal tubes 21 and 22, which are connected to one another at a suitable distance by welding them to one another using a suitable width of a snack 23.

Because the sidewall of the harvester log is typically very uneven, the actual vertical support tube is extruded at its lower end in a transverse B-B configuration to provide a solid support for lateral attachment.

10 In the vertical direction, the lower end of the vertical support tube 21 is similarly pressed in a curved manner so that the fastening is also strong in the direction of the fastening screws 24. As in Fig. 9, the metal structure can be protected by casting plastic 25 on it or protecting the walls of the structural tube with a suitable diameter plastic tube or plastic molding 26 and ends with rounded plastic stoppers 27 of sufficient impact strength, which can be replaced if necessary.

A modification of the fork structure shown in Figure 9 is the structure of Figure 10 wherein one side of the fork is made of a metal tube or circular profile by bending it as shown in Figure 10 and welding its lower end to the other side of the fork.

The upright support structure can also be made of a metal flat profile by machining the fork at the upper end and bending the lower end to a suitable angle for attachment as in Figure 11.

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Also, the metal angular profile can be made into a support structure for the vertical support by machining the fork at the upper end, as in Fig. 12.

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The material of the rubber hose 4 is well suited to a fiber reinforced rubber pressure hose or the like, which is also relatively longitudinally stiff and retains its elasticity in the transverse direction.

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Claims (10)

104541 Apparatus for increasing occupational safety when chopping trees, characterized in that the apparatus comprises a shielding log (1) attached to the side of a splitting log or other substrate, which is intended to protect the splinters against straying of the splitting tool. Device according to Claim 1, characterized in that the shield protective device (1) is attached to the cleaving platform by means of a separate support structure (2) in an oblique position 10. Device according to Claim 1, characterized in that the protective device (1) is adjustable laterally and vertically and in relation to its inclination. Device according to Claim 1, characterized in that the device is located on the extension of the path of the cleavage tool. » Device according to Claim 1, characterized in that the shield protective device (1) is made of a material which is strong but not damaged by the cleavage tool. Device according to claim 1, characterized in that it is concave in the cross-sectional shape towards the path of the cleavage tool. Device according to Claim 1, characterized in that it further comprises means (4) for binding the trees to be chopped into pieces and means (20, 21-27) for interlacing. for securing the bracket (4). Device according to Claim 7, characterized in that the binding means (4) 30 consists of a rubber or a similar hose. Device according to claim 7, characterized in that the fastening means (20-27) is at least one vertical support containing a slot. "104541 Night Device according to Claim 9, characterized in that there are two vertical supports containing the slot. • r «9 Λ A 9 104541