JPH0586501U - Guide plate for chainsaw with lubricant leakage prevention mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent a large amount of lubricant from leaking from the discharge hole. [Structure] In a chain saw guide plate 1 having a plurality of discharge holes 3 around a guide groove 2, a metal plate 7 for closing the most proximal side of the discharge holes 3 is provided, and a lubricant supply side C is provided by the metal plate 7. The discharge hole 3a was closed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a guide plate of a chainsaw used for cutting wood, stone, and root cutting in soil, and more particularly to a guide plate for a chainsaw provided with a mechanism for preventing leakage of lubricant supplied to the guide plate. It is a thing.

[0002]

[Prior Art]

 Conventionally, as a general guide plate used in this type of chainsaw, there is one shown in the front view of FIG. As shown in the figure, this guide plate is formed with a guide groove 2 around the guide plate 1 for guiding the chain 4, and a drive link 5 of the chain 4 is interposed in the guide groove 2. A discharge hole 3 is provided at the bottom of the guide groove 2 for discharging chips, dirt and the like in the guide groove 2. The discharge hole 3 is formed so as to penetrate the guide plate 1 for discharging chips and mud, and a plurality of substantially oval-shaped holes are formed along the bottom of the guide groove 2. The drive link 5 discharges the chips and mud from the discharge hole 3 as the chain 4 rotates in the direction of arrow A.

When cutting roots of wood, stones, and soil with a chainsaw, the lower part of the guide plate 1 is mainly used for cutting, so that wood, stones, soil, etc. are constantly in contact with each other. The lower side is worn early. Therefore, as shown in the figure, the guide plate 1 is manufactured symmetrically in the vertical direction so that if one wears, it can be inverted and the other can be used. By properly using both, the life of the guide plate 1 can be extended. I am trying to

[0004]

[Problems to be solved by the device]

 By the way, since the chain 4 which rotates along the guide groove 2 of the guide plate 1 rotates at a high speed, heat and seizure due to friction occur. Therefore, for the purpose of preventing the heat generation and the seizure, the lubricant is supplied to the guide groove 2 from the supply portion 6 provided at the base of the guide plate 1 (hereinafter, the lubricant is supplied to the upper side of the guide plate 1 in the drawings. Side C). The lubricant is supplied around the guide plate 1 along the guide groove 2 by the drive link 5 of the chain 4.

However, since a discharge hole 3 that penetrates the guide groove 2 is provided around the guide plate 1 in order to discharge chips, mud, and the like in the guide groove 2, this discharge hole 3 Lubricants will leak out along with chips and mud. Since the lubricant is supplied from the upper supply unit 6, a large amount of this leakage will leak from the discharge hole 3a provided at the uppermost base closest to the supply unit 6.

A large amount of the lubricant leaks from the discharge hole 3a at the most base portion, so that the amount of the lubricant supplied to the tip portion of the guide plate 1 becomes 20 to 30% of the total amount, and the lubricant supply The amount of lubricant supplied to the side opposite to the side C is extremely small.

Therefore, since the lubricant is not supplied to the entire circumference of the guide plate 1, the effect of lubrication or heat radiation is impaired, and the effect of preventing heat generation and seizure of the chain 4 by the lubricant can be sufficiently exerted. There wasn't. In particular, since the guide plate 1 is often cut using the opposite side of the lubricant supply side C, the lubricant is not sufficiently supplied to the cut side.

In view of the above problems, an object of the present invention is to provide a guide plate for a chainsaw in which a mechanism for closing the discharge hole at the outermost base is provided to prevent a large amount of lubricant from leaking from the discharge hole. To do.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, a guide plate for a chain saw with a lubricant leakage prevention mechanism according to the present invention is a guide plate for a chain saw having a plurality of discharge holes around a guide groove, which blocks the most proximal side of the discharge hole. Is provided, and the discharge hole on the lubricant supply side is closed by the closing means.

[0010]

[Action]

 The function of the above configuration is that the closing means closes the discharge hole located at the most base of the lubricant supply side, so that the lubricant leaking from the discharge hole disappears. As a result, a sufficient amount of lubricant is supplied from the tip of the guide plate to the opposite side, which reduces wear on the sliding parts between the guide plate and the chain, and also prevents heat generation and seizure of the chain and guide plate. prevent. Further, even if the discharge hole located at the most base of the lubricant supply side is closed by the closing means, the discharge function from the guide groove is not hindered because chips, mud, etc. are sufficiently discharged from the other discharge holes.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the same components as those of the guide plate described above will be designated by the same reference numerals.

FIG. 1 is a partial front view showing a base portion of a chainsaw guide plate according to the first embodiment, and FIG. 2 is a plan view of FIG. In the first embodiment, the metal plate 7 having a spring property is used as the closing means, and the packing 8 is provided on the closing surface of the metal plate 7.

As shown in the figure, the guide plate 1 is provided with a metal plate 7 so as to close the discharge holes 3a and 3b located at the most base portion thereof. To attach the metal plate 7, A fixing hole 9 is formed at a predetermined position on the center line. A locking hole 10 is formed on the line connecting the fixing hole 9 and the discharge holes 3a and 3b.

On the other hand, in the metal plate 7, a packing 8 is adhered to the closed surface of the discharge hole 3a, and an attachment hole 7a is formed on the support side opposite to the closed surface. Then, a convex portion 7b protruding toward the guide plate 1 side is formed substantially at the center of the closed surface and the supporting side.

To attach the metal plate 7 to the guide plate 1 thus formed, the attachment holes 7a of the metal plate 7 are positioned on both sides of the fixing hole 9 of the guide plate 1, and the bolts and nuts 11 are screwed together. It is attached by doing. At this time, since the convex portion 7b formed on the metal plate 7 is engaged with the locking hole 10 of the guide plate 1, the position of the metal plate 7 is determined.

When the guide plate 1 is inverted and used, the bolts and nuts 11 fixing the metal plate 7 on the discharge hole 3a side are loosened, and the metal plate 7 is rotated to rotate the discharge plate on the opposite side. 3b (two-dot chain line) side, the convex portion 7b is engaged with the locking hole 10 and the bolt / nut 11 is tightened to fix the metal plate 7, and the closing of the discharge hole 3b is completed. ..

Next, a second embodiment shown in FIGS. 3 and 4 will be described. In this embodiment, the metal plate 7 which is the closing means in the first embodiment is made smaller, and the functions of the fixing hole 9 and the locking hole 10 of the first embodiment are replaced. is there.

As shown in the figure, a locking hole 10 is formed on the center line of the guide plate 1, and a fixing hole 9 is formed on the line connecting the locking hole 10 and the discharge holes 3a and 3b. The metal plate 7 has a packing 8 adhered to the closed surface thereof, a mounting hole 7a formed substantially at the center, and a projection 7b formed at the end. The metal plate 7 is attached to the guide plate 1 by positioning the attachment holes 7a of the metal plate 7 on both sides of the fixing hole 9 of the guide plate 1 and screwing the bolts and nuts 11 into the guide plate 1. To wear. At this time, since the convex portion 7b formed on the metal plate 7 is engaged with the locking hole 10 of the guide plate 1, the position of the metal plate 7 is determined.

Next, a third embodiment shown in FIGS. 5 and 6 will be described. This embodiment is an example in which the metal plate 7 in the second embodiment is vertically inverted with respect to the discharge hole 3, and the fixing hole 9 and the locking hole 10 are shared.

As shown in the figure, the guide plate 1 is provided with two fixing holes 9 on the line connecting the discharge holes 3a and 3b, and the metal plate 7 has a packing 8 adhered to the closed surface thereof. The attachment hole 7a is formed in the substantially central portion, and the convex portion 7b is formed in the end portion. The metal plate 7 is attached to the guide plate 1 by positioning the metal plate 7 on both sides of the fixing hole 9 of the guide plate 1 and screwing bolts and nuts 11 into the guide plate 1. At this time, since the convex portion 7b formed on the metal plate 7 is engaged with the other fixing hole 9 of the guide plate 1, the position of the metal plate 7 is determined.

By the way, if the shape of the discharge hole 3 is increased, the discharge effect of chips, mud, etc. is improved. However, in the conventional guide plate 1, since the lubricant leaks from the enlarged discharge hole 3, it is impossible to provide the discharge hole 3 that is too large.

However, according to the present invention, even if the discharge holes 3a, 3b at the most proximal portion are formed large as shown in FIG. 3 or 5, the discharge hole 3a on the lubricant supply side C is formed on the metal plate 7. Since it is more completely blocked, there is no leakage of lubricant, and chips, mud, etc. are sufficiently discharged from the discharge hole 3b on the opposite side, so the effect of discharging chips, mud, etc. can be improved compared to the past. You can

As described above, according to the present invention, since the metal plate 7 closes only the discharge hole 3a (or 3b) on the lubricant supply side C, chips, mud and the like are discharged from the other discharge holes 3. It has the same emission function as the conventional one. Further, since both side surfaces of the discharge hole 3a are sealed by the metal plate 7 having the packing 8, the lubricant supplied to the guide groove 2 does not leak from the discharge hole 3a, and the tip portion of the guide plate 1 and The amount of lubricant that reaches the bottom is several times higher than before. Therefore, the lubricity between the chain and the guide plate is significantly improved, so that heat generation, seizure prevention and sliding part wear are reduced. Moreover, since the metal plate 7 can close the discharge hole 3a (or 3b) at the most base portion even if the symmetrically formed guide plate 1 is used in any direction, the guide plate 1 is The same effect can be obtained even when used in the direction.

The guide plate 1 is used by turning it upside down as appropriate, and in this case as well, the metal plate is provided above and below the guide plate 1 by moving it vertically from the fixing hole 9 for mounting. The discharge holes 3a and 3b can be appropriately dealt with.

[0025]

[Effect of the device]

 According to the present invention, the lubricant supplied from the supply unit is prevented from leaking from the discharge hole at the most base by the closing means, so that the lubricant is sufficiently supplied to the tip of the guide plate or the opposite side of the lubricant supply side. , Lubricity or heat dissipation is improved.

Further, since the closing means can close the discharge hole at the most base portion by using the symmetrically formed guide plate in any direction, the same effect can be obtained even if both sides are properly used. Obtainable.

Further, since the discharge hole at the most base is closed by the closing means, the shape of the discharge hole can be made large, which allows the discharge from the discharge hole at the most base located on the opposite side of the lubricant supply side. The effect of increasing the amount of cutting chips, mud, etc. is also obtained.

[Brief description of drawings]

FIG. 1 is a partial front view of a guide plate showing a first embodiment of the present invention.

FIG. 2 is a partial plan view of the first embodiment shown in FIG.

FIG. 3 is a partial front view of a guide plate showing a second embodiment of the present invention.

FIG. 4 is a partial plan view of the second embodiment shown in FIG.

FIG. 5 is a partial front view of a guide plate showing a third embodiment of the present invention.

6 is a sectional view taken along line BB of the third embodiment shown in FIG.

FIG. 7 is a front view showing a conventional guide plate for a chainsaw.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Guide plate 2 ... Guide groove 3 ... Ejection hole 4 ... Chain 5 ... Drive link 6 ... Supply part 7 ... Metal plate (closing means) 8 ... Packing 9 ... Fixing hole 10 ... Locking hole 11 ... Bolt / nut C ... Lubricant supply side

Claims (1)

[Scope of utility model registration request] 1. A guide plate for a chainsaw having a plurality of discharge holes around a guide groove, wherein a closing means for closing the most proximal side of the discharge hole is provided, and the discharge hole on the lubricant supply side is closed by the closing means. Guide plate for chainsaw with a lubricant leakage prevention mechanism characterized by