JPS6139522Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a chain with a cutting blade used in a chain saw or the like.

Fig. 1 shows a perspective view of a chain saw. 1 is a housing forming the main body frame, and inside is a prime mover such as an electric motor or a gasoline engine (not shown).
is built-in. 2 is fixed to the housing 1 with a guide bar and has a rail groove 4 for guiding a chain 3 with cutting blades driven by a prime mover. FIG. 3 shows details of the chain 3 with cutting blades, in which the right cutting blade 5 and the left cutting blade 6 are connected in alternating positions by a chain side plate 7, a chain feed guide 8, and a rivet 9 so as to be bendable. There is. Cutting depth adjusting side plates 10 are integrally formed at the front portions of the left and right cutting blades 6, 5, respectively. FIG. 4 shows cutting by the chain 3 with cutting blades shown in FIG. 3, where 12 is a workpiece and 13 is a cutting groove. The chain 3 with a cutting blade is driven and the chain feed guide 8 is guided by the rail groove 4 of the guide bar 2 when the chain 3 is driven.

In the case of cutting using the cutting blade of the conventional chain 3 with cutting blades, the left and right cutting blades 6, 5 are attached alternately to one side, so if the cutting load is applied to the cutting blade from the side, the cutting blade Since there is a relief of the cutting blade on the side where the cutting blade is not provided, there is a drawback that the cut surface is not a uniform plane but is formed into a stepped plane depending on the amount of relief of the cutting blade.

An object of the present invention is to provide a chain with cutting blades that eliminates the above-mentioned drawbacks and allows the cutting surface to be formed into a uniform plane.

Hereinafter, one embodiment of the chain with cutting blades of the present invention will be described with reference to FIGS. 5 and 6, where the same parts as those of the conventional art are given the same reference numerals, and the explanation of the same parts will be omitted. A chain side plate 7, which moves almost identically to both cutting blades 5 and 6 arranged on the sides of the right and left cutting blades 5 and 6, is opposed to a cutting depth adjusting side plate 10. As shown in FIG. 6, the height of the guide side plate 11 is almost the same as that of the adjustment side plate 10, and the width L formed by the adjustment side plate 10 and the guide side plate 11 is slightly narrower than the width L formed by the cutting blades 5 and 6. , and is provided in a shape along both side surfaces of the cutting groove. During cutting when the chain 3 with cutting blades is driven by the prime mover and driven along the outer periphery of the guide bar 2, the left and right cutting blades 6, 5 are alternately provided only on one side, so that the cutting resistance causes the cutting blades to The cutting blade escapes to the side without the blade, and the chain 3 with the cutting blade tends to tilt. However, as shown in FIG. 6, when the left cutting blade 6 is tilted, the guide side plate 11 on the side where the left cutting blade 12 is not located comes into contact with the side surface of the cutting groove 13 to suppress the tilting (relief) of the left cutting blade 6. This state is repeated with each cutting blade to perform cutting. In this case, since the cutting blades 5, 6 and the guide side plate 11 move in the same manner, no positional deviation occurs between them.

As described above, according to this embodiment, the relief of the cutting blades that are attached alternately during the cutting operation is reduced, so that the cutting surface can be cut into a uniform plane. Furthermore, since the amount by which the chain 3 with cutting blades is alternately swung becomes smaller, vibration of the main body can also be reduced.

Furthermore, according to this embodiment, the energy of backlash can be greatly reduced. In other words, the cutting blade is a cutting blade in which the cutting blades 5 and 6 bite into wood or the like in the range of approximately 1/4 upper circular part B of the approximately circular tip 2a of the guide bar 2 in FIG. The chain becomes locked, and as a reaction, the guide bar 2 receives an upward force and bounces back toward the operator.

The reason for this biting is that the cutting depth adjustment side plate 1
One of the causes was that the 0 burrowed into wood or the like. According to this example, by adding the guide side plate 11 in addition to the cutting depth adjustment side plate 10, the area that comes into contact with the wood etc. increases, making it difficult to sink into the wood, etc.
The energy of Kitsukubatsu is reduced to a large cloth.

FIG. 7 and FIG. 8 each show other embodiments,
In the above embodiment, the guide side plate 11 is provided in front of the cutting blade in a position facing the cutting depth adjustment side plate 10, whereas in the embodiment shown in FIG. 7, the guide side plate 11 is provided in a position facing the cutting blade. In the embodiment shown in FIG. 8, left and right cutting blades 6 and 5 are arranged adjacently and alternately, and a guide side plate 11 is provided at a position opposite to the cutting depth adjusting side plate 10. This embodiment also has the same effects as the embodiment shown in FIG.

As described above, in the present invention, since the guide side plate is formed on the chain side plate which is located on the side of the cutting blade and moves in the same manner as the cutting blade, the cutting surface can be formed into a uniform plane. Furthermore, the amount of swing of the chain with cutting blades to the left and right during cutting can be reduced, and the energy of backlash can be reduced, thereby improving safety.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a chain saw with a chain with a cutting blade attached, Fig. 2 is a sectional view taken along the - arrow in Fig. 1, and Fig. 3 is a perspective view of the chain with a cutting blade in Fig. 1.
Fig. 4 is an explanatory diagram of the cutting state of the chain with cutting blades shown in Fig. 3, Fig. 5 is a perspective view of an embodiment of the chain with cutting blades of the present invention, and Fig. 6 is an illustration of the chain with cutting blades shown in Fig. 5. 7 and 8 are perspective views showing other embodiments of the present invention. 5... Right cutting blade, 6... Left cutting blade, 7... Chain side plate, 8... Chain feed guide, 9... Rivet, 11... Guide side plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A plurality of left cutting blades and right cutting blades, each having a cutting depth adjusting side plate, are arranged alternately at intervals, and both of the cutting blades are connected to a chain side plate and a chain feeding blade. Flexibly connected via guides, rivets, etc.
In a cutting blade chain in which one chain side plate is arranged substantially integrally with both cutting blades at a side facing position of both cutting blades, the chain side plate arranged facing each of the two cutting blades has a A chain with a cutting blade, characterized in that a guide side plate is provided with a height almost the same as the cutting depth adjusting side plate. (2) The cutting according to claim 1 of the utility model registration claim, characterized in that the width from the guide side plate to the cutting depth adjustment side plate is configured to be slightly smaller than the set width formed by the left and right cutting blades. Chain with blade.