JPS62500770A - Rotary cutting machine and its parts - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Rotary cutting machine and its parts [Technical field] The present invention relates to rotary cutting machines, particularly rotary cutting machines and parts thereof, such as cutter brakes. related to safety equipment and safety equipment.

Rotary cutting machines also create an air cushion above the vegetation to be cut, causing the cutting machine to Can be used as an airlift type with a swiveling cutter blade supported on the Manually supported strimmers supported on the user's waste and ground supported skids or can be classified as non-airlift types such as wheeled equipment.

[Background of the invention] Rotary cutting machines pose a significant safety hazard to both users and onlookers. has been recognized for a long time. Cutter blades often exceed 4500 ppm. An object that rotates at high rotational speeds and is impacted by a blade generates a considerable amount of energy. or the blade may explode as a result of metal fatigue. It can also be a dangerous bullet.

Many proposals have been made to minimize these risks. however, U.S. Patent No. 3.971.199 for non-airlift wheel-mounted cutting machine Many such as ing.

Safety proposals that criticize and impair the cutting efficiency of cutting machines are not acceptable to those in need. It only limits. U.S. Pat. No. 3,971,199 relates to cutting machines. Of the 30,000 reports made to the U.S. Public Health Service in 1973 regarding It is reported that 30% of these accidents occurred due to objects thrown by the rotating blades. .

Many strimmers replace the metal cutter blade with a flexible nylon string and then Use this to remove vegetation adjacent to solid surfaces that could damage the metal blade, such as walls. Include cutting tools. The rotary cutting machine according to the present invention also includes this means, and also has a cover. Attach a string instead of the cutter head and blade, or attach the cutter head or blade. Generally, the safety device is removed from the blade.

According to the invention, therefore, metal or a sturdy plastic material, such as nylon, Use a non-flexible cutter blade that can be made of sticky material; Attaches to the head so that it can rotate freely. The bar graphs in Figures 1 and 2 are Ropeller-shaped cutter blade path and rotatably mounted cutter blade paths (these cutter blades have equal tip path diameters and rotate at the same speed) Compare the throwing distances for test samples of the same weight thrown into the ing. These bar graphs show that the average throw distance is - for non-swivel blades. Not only does it clearly show that it is the largest, but it also shows that the maximum throw distance is greater. It also shows that In this case, different The test conditions were repeated using test specimens weighing as much as The distance of the material was recorded as the danger distance (radius) for that trial 1'1 standard. The area (area) is 2.1 for each 12g test sample thrown the farthest. The ratio was 1 to 1, but for the 31g sample thrown the farthest, it was 3.0. For the 47CJ sample, which increased to a ratio of 1 to 1 and was thrown the farthest, 8 ．． The ratio increased to 5:1. Thus, for example, U.S. Patent No. 3,815,234 A rotatably mounted cutter blade, as known from resulting in significant safety improvements. Furthermore, U.S. Patent No. 3,815,234 To limit the permissible pivoting movement of the cutter blade relative to the cutter head It is disclosed that a contact portion is provided.

The use of pivoting blades is advantageous in that it can significantly extend the life of the drive means. what This is because the drive means are not subjected to the same degree of reactive shock loading. however , the arrangement proposed by the present invention is significantly compared to that of U.S. Pat. No. 3,815,234. It has significant improvements. For example, the cutter blade according to the invention Attached to the cutter head by a bushing that is wider than the blade, the bushing is wider during use. The blade can be moved freely (driven or stationary without contact with the cutter head) When stopped, the cutter head and cutter brake can be freely maneuvered, thus Allows for pivoting movement even when grass or dust is present between the board and the board. cutter The blade may, for example, have a movement of the cutter blade away from the plane of the cutter head. A retaining member, such as a washer, which acts to limit the movement of the Akira holds the cutter blade in case the pivot ruptures and this cutter blade. The drive to at least the cutter is stopped or released. A suitable holding means is provided to hold the Cutter head and cutter blur The means for retaining the cutter head allows for interengagement without the need to first remove the cutter head. Can be done. In general, the retention means should be designed to adequately warn the driver of pivot damage. It is measured. Preferably, the holding means is such that the cutter blade is planar and the cutter blade is planar. positioning the first opening on the pivot supported by the head and connecting the cutter with the first opening; to prevent the arcuate slot from normally engaging the holding tank supported by the pad. This tank is designed to protrude from the thrower 1~, and the tank is and one wall of the slot form the retaining means and the rotation of the cutter blade. Providing a contact portion that limits rotational movement to prevent engagement between one end of the slot and the tongue. By doing so, it is possible to avoid sudden impact rupture of the tongue, and to prevent the user from noticing. Prevents loss of retention means. The part marked [Thrower] is the pivot of the cutter blade. Located between the axis of the cutter head.

[Disclosure of invention] Accordingly, in accordance with one feature of the invention, a cutter blade assembly for a rotary cutting machine is provided. This cutting machine has a cutter head with a rotating shaft and a a cutter blade supported by a cutter blade and having a cutting surface; The cutting surface of the cutter head under centrifugal force as the blade and head pivot. The cutter is placed on a cutter head that is positioned so that it can pivot outwardly away from the A swivel mounting part for mounting the blade, and a cutter blade when the swivel mounting part is lost. retaining means on the cutter head engageable under centrifugal force caused by the cutter head; - Change cutter blades on this cutter head without removing the head It is characterized by a loco. According to another feature of the invention, it is rotatable about an axis. a cutter head, a cutter blade having a cutting surface, and a cutter blade on the cutter blade; The cutting surface is removed from the cutter head under centrifugal force as the blade and head pivot. The cutter blade is mounted on the cutter head, which is positioned so that it can swivel away. A swiveling mount for rotation and centrifugal rotation by a cutter blade upon loss of the swivel mount. retaining means on the cutter head engageable under force, said retaining means being in the slot. A tang that can engage one edge of the cutter so that the cutter head has a slot with one side of the tank. and the cutter blade has the other tank and a slot. A cutter blade assembly for a rotary cutting machine is provided.

Preferably, the retaining means on the cutter head is a tank that stands upright from the cutter head. , the cutter blade has an arcuate slot centered on the pivot mount, and the cutter blade has an arcuate slot centered on the pivot mount The cutter blade is inserted into this slot, and a contact means is provided to allow the cutter blade to pass through. By reducing the pivoting motion to be accommodated, one end of the thrower 1~ during this pivoting motion. prevent contact with the tank by parts.

Six types of cutting machines can be used for 1α raw, but one typical requirement is Cutting wet grass and cutting fibrous grass in autumn. Replaceable cup Turblade has already been proposed for example in US Pat. No. 3,320,733. Ru. However, in the present invention, preferably, it is not necessary to remove the blade from the cutting machine. A blade is used that allows the cutting characteristics to be changed without any need.

According to a further feature of the invention, the The cutter head and the cutter blade attached to the cutter head in a rotatable manner. The cutter is equipped with a weight means that is detachably attached to the cutter blade. A rotary cutting machine characterized by allowing adjustment of the moment arm of the blade. A cutter head assembly is provided for. The invention therefore provides It is proposed to adjust the weight and/or weight distribution of the cutter blade to suit the raw material. come up with a plan Preferably, the cutter blade has one or more openings. position the weight selectively there, for example to cut fibrous grass. It is possible to use heavier blades or move the center of gravity further from the axis of rotation. can. In the case of a swiveling blade, this arrangement has the advantage that it can be adjusted without having to remove this blade. Furthermore, this It is as fast at cutting through fibrous vegetation as aggregates that do not have this feature. It has the advantage that there is no need to drive the cutter head assembly at rotational speed.

In other embodiments, the invention can provide a replaceable cutter surface, This cutter surface can be of various weights. Other features of the invention, such as According to It is equipped with a cutter blade that is rotatably attached to the cutter blade, and the cutter blade is interchangeable. Blade assembly for a rotary cutting machine characterized by having a convertible cutting surface I will provide a.

In other features, the invention includes a base member rotatable about a drive axis; A cutter blade with a surface and this cutter blade can be attached to and detached from the cutting surface. means for attaching to a pair of upright, axially spaced members; , one of these members being located at the first edge of the cutter blade opposite the cutting surface. While engaged, the other member is opposite the first edge but axially from the cutting surface. contacting the second edge of the spaced apart cutter blade, the cutter blade the rotation, comprising at least one cutout reintroduction part surrounding one side of the part; A rotary cutting machine characterized by holding the cutter blade against centrifugal force during rotation. Provides a blade assembly for. The advantage of the arrangement according to the invention is that the cutter blade to the base member or its attachment primarily to the radius without interfering with the base member or its attachment. The scales are displaced inward.

``fIT　'11 Existing in the path of the cutter blade and cutting) Concerning stones and other loose materials that may be thrown out and pose a danger to onlookers and users. There are many studies on this problem.

For example, a report was published in 1974 on various types of thrown materials that cause damage. Details are given on page 7 of the second document to the June 1976 U.S. Consumer Goods Safety Council Report. Of the United States mentioned! iJI research is used to detect objects such as electric wires, broken glass, etc. +: Damage to small hard materials or objects that are mainly thrown out: Original prisoners. Which indicates that. This is probably because electric wires thrown out at high speed can easily be used by humans. This penetration can be fatal if it consists of This is because it causes organ damage. For example, changes to testing for thrown objects. revised standards have been adopted, and the target shape of the rectangular wall section is to be applied to the test surface covered with artificial grass. Surround it with objects and operate the cutting machine to cut 300 nails into the blade tip circle. into the blade from six locations, each located 2.54 cm apart and aligned with the test surface. discharge.

The number and location of nails hitting the target determines whether this cutting machine passes the criteria. , nails that hit the user's area will be severely punished. This standard meets the revised standard. This was set despite the fact that a large number of cutting machines were obtained for each test. Cutting efficiency is improved. Since it is not part of the revision standards, it is unclear whether this main cutting machine was effective in cutting vegetation. There is no suggestion as to what to do. After long-term experiments, it is thrown out without noticeable loss of cutting efficiency. To meet the revised U.S. standards for articles that Attach the material to the support members to form the safety roof section, and the skirt section to keep the grass away. It was concluded that it was necessary to guide the cutter blade in the direction of the cutter blade. However, A skirt of at least 160° in the user's zone is rigid for user protection. i.e. there must be no openings and this angle is only in the straight direction. For moving wheeled cutting machines it is desirable to increase the angle by 200°. did Therefore, compared to the proposal of U.S. Pat. No. 4,069,651, the use according to the present invention There is no part 11 of the Mecha-1~ part of the user band, and it is roughly Canada '14j revision No. 984, Compared to the proposal of No. 602, the safety member of the present invention is cantilevered and subjected to blade impact. The material shall be protected and flexed in the event of a collision. Obviously, a distant security The complete safety device is suitable for use on airlift type rotary cutting machines. Not yet.

As a result of testing the safety device for shoulder-mounted strimmers, the safety device was found to be 5.08 mm above the test surface. Set the blade height to cm (2 inches). How many sheets is this [A, N ,S,1. (American National Standards Institute) This is because the height is specified in the test method. The revised standards generally cover a wide range of test objectives. To this cutting machine simply without specifying the height of the blade, directed to penalties regarding the dispersion of It only requires the maximum blade height that can be used. Greater height is normal vegetation does not indicate the cutting length and the smaller height means that many test articles will clear the test surface. means a collision without a test, and therefore clearly a poor rather than a good test. bring results.

According to an advantageous characteristic of the invention, the invention therefore comprises a roof and a skirt. Provides a safety device for one cutter blade in a non-airlift rotary cutting machine. , the skirt is circumferentially spaced from a first section having a circumferentially spaced opening; a second section without an opening, and a plurality of safety members each having a leg section and a second section having no opening; and a leg portion forming a portion between the roof of the first section and the finger. to be accomplished. Each safety member preferably has circumferential fins with adjacent fins having a spacing smaller than the spacing between them. It has a width. -11 (The safety member is formed as an anti-bullet)) Snap city Place one part or knock (!). Adjacent fingers are preferably spaced apart. so that the tangent to the blade tip passage passing between the fingers crosses the two fingers. Try to cut it off.

Limits the number of times impact articles trapped within the skirt collide with the pivoting cutter blade The second section preferably has a brake intermediate its circumferentially spaced ends. and are spaced at least 2 cm radially outward of the guard tip path. Safety members are flat As a shape, a generally rectangular obstacle can be formed to the impact article. preferred This is the second section that the blade first encounters when entering the second section. The two members adjacent to the ends of the It includes legs and fingers having a critical dimension. Conveniently, safety equipment according to the invention The device is assembled from modular parts, and this module arrangement is paired as described above. The advantage is that there is no need to use the same safety components, and each component can be replaced individually. has. Preferably, the safety device of the present invention comprises three differently designed pairs of safety members. It is becoming more and more. As mentioned above, the first user area that the swiveling cutter blade encounters is The two safety elements immediately adjacent to one end of the skirt in the It has large dimensions. Roughly, the two at the other end of the skirt provided in the user area. Safety member, Zunawara The last member from which the swivel cutter blade leaves is generally its radius The directional end is located on the cord connecting the adjacent safety member to the skirt, e.g. Creates a straight safety edge suitable for cutting along walls.

The said pair of safety parts A has sufficient dimensions, in particular a suitable part of the first skirt section. In order to maintain the dimensions of the corresponding fingers that define the The leg portion is arranged such that the end thereof is spaced apart from the skirt of the user area. The direction angle is set so that the vegetation to be cut is placed in the cutting machine as the user advances the cutting hole along the wall. It has the advantage of acting as a guide.

The object subjected to the 'effl'R of the cutter 7 rade has a reduced kinetic energy. With this, you can escape from the safety device. Tests show that the user domain An object that is hit by a WH and is within the skirt of the object can be collided with more than once before being thrown out. Therefore, a minimum radius of at least 2 cm between the blade tip and the inner wall of the skirt Provide directional clearance and at the end where the swivel cutter blade leaves last. Preferably, the skirt in the user area is provided with an inward projection.

According to still further features of the invention, therefore, a rotatable cutter head; a driving means for the cutter head; and a drive means rotatably attached to the cutter head. A cutter in which the cutting surface on the blade projects radially outward from the cutter head blade and by engaging the cutter blade away from the pivot mounting position. A cutter that prevents the cutter blade from separating from the cutter head during use. - means on the head and a skirt for rotating said cutter blade therein; To provide a rotary cutting chamber comprising safety measures.

[Brief explanation of the drawing] Figure 1 shows the distance over which a test object with open propeller-shaped blades was thrown. Figure 2 is a repeated bar graph similar to Figure 1 that depicts the rotating blade. It is a graph of Figure 3 shows a strimmer rotary cutter with a rotating cutter blade and a module safety device. Fig. 3A is a cross-sectional view of the cutter, and Fig. 3A shows other safety devices attached to the device shown in Fig. 3. This is an enlarged view. Figure 4 is an enlarged detailed view of the swivel attachment for the swivel blade, and Figure 5 is the navel of Figure 4. Cutter head/cutter omitting the bolt 42, spring washer 40, and washer 38 FIG. 2 is a plan view of a turblade rotating attachment part; FIG. 6 is a plan view of the replaceable cutter tip of the base member 66; FIG. 7 relates to another embodiment of a replaceable cutter tip with a retaining stud. Fig. 6 is a sectional view taken along line VI[-VI[, and Fig. 8 is a sectional view of the rear part of the safety device. , FIG. 8A is an enlarged cutaway view of the blade exit end at the rear of the safety device; FIG. 8B is an enlarged cutaway view showing the blade inlet end at the rear of the safety device; Figure 8C is a cutaway view of another embodiment of the blade exit end at the rear of the safety device. the law of nature, Figure 9 is a diagram of the front part of the safety device showing the circumferentially spaced ends of the rear part of the safety device. It is a clear map, FIG. 10 is an explanatory diagram of the front part of the first safety member, FIG. 11 is an explanatory diagram of the front part of the second safety member, Figure 12 is an explanatory diagram from Part 114 published by the Third Safety Department, and Figure 13 is an explanatory diagram of the legs and fingers. This is an explanatory diagram of the modified safety member on the right side of the square wing.

Fruit of U invention 71f! ! Mode] The rotation l and TI cuts shown in FIG. 3 are the housing part 2 and cutter blade assembly. 4 and a cutter safety device 6.

In this embodiment, the housing 2 includes a coupling for a shoulder strap (not shown). ), the cutting machine can be a manually supported strimmer, but in other embodiments 9. The modification of the present invention allows the housing part 2 to be mounted on a wheel or a skid. A good cutter blade assembly 4 is caused by, for example, a rotating cutter blade. It can also be used with air lift type cutting machines supported by an air cushion. Wear. The housing part 2 is provided with a hollow tube 10 into which a petroleum engine or an electric motor is installed. It has a built-in shaft 12 that is rotatably driven by a main drive device (not shown) such as a motor. do. The shaft 12 is connected to a drive shaft 16 via a gear 14, and this drive shaft is connected to a pole lever. It is rotatably supported within the housing portion 2 by a base 18 . The drive shaft 16 It has a fixed bush 20 and a washer 22 that can rotate together with the shaft 16, A threaded end 24 for 26 is provided. In this example, the cutter blade collection The adult body is positioned between the shoulder formed in the fixed bushing 20 and the washer 22. , can be removed as a subassembly after loosening the nut 26.

In the embodiment of FIG. 3, the safety device 6 includes an annular support 2 integral with the housing part 2. Supported by 00. However, in other embodiments as shown in FIG. In this case, the support part 200 can be attached to and detached from the housing part 2 by screws 201, for example. fixed in place.

The cutter blade assembly 4 is rotatably attached to a cutter head 30. A pair of cutter blades 32 are provided.

When rotating around the drive ItII 116, the cutter blade 32 is affected by centrifugal force. It protrudes radially from the cutter head 30 at the bottom. These cutter blades 32 pivot on the cutter head 30 in a coordinated arrangement. In this example, 2 cutter blades 32 are mounted in diametrically opposed positions; Three or more blades may also be used.

The pivot mount is shown more clearly in the detail view of FIG. Cut the pivot bush 34. - located on the bolt 36 between the head 30 and the washer 38. This pivot Tobush 34 is not rotated by spring washers 40 supported by nuts 1 to 42. is being prevented. The pivot bushing 34 can be driven, for example, by a relaxed object. When it receives an impact from the cutter blade 32 when turning around the axis 16, , enabling each cutter blade 32 to pivot relative to the cutter head 30. . Each pivot bushing 34 has a depth greater than the thickness of the cutter blade 32. , one of the Katsutani head 30, the cutter blade 32, and the washer 38, or If more than that are made of ferrous material and the cutting machine is stored for example during the winter period makes it possible to remove accumulated grass or dust or rust. Washile 3 8 also has the following objectives.

Each cutter blade 32 engages an upright ear 46 from the cutter head 30. surface 44 for controlling pivoting movement, for example up to or over 90°. limit In another embodiment shown in FIG. 3, a bushing 20 serves as this contact means. It also works.

In general, when one or more of the cutter blades 32 pivots, the surface 44 is a circular arc having its center radially outward of the pivot bushing 34, and the cutter head Expose one side or use of the chamber 48 drilled downward from the door 30, and insert the cover there. Debris that accumulates between the cutter head 30 and each cutter blade 32 may be removed during use. Introduced by raid. Thus, the blade can be rotated to this limit position and Debris can be removed from chamber 48 by stopping the drive. . The chamber 48 has a solid bottom to prevent sand or gravel from being removed during use of the rotary cutting machine. enters the space between the cutter head 30 and cutter blade 32 from below. prevent.

Each cutter blade 32 is planar and has an arcuate slot 5o, with its center Place it on the axis of the pivot bushing 34. The tongue 52 stands upright from the cutter head 30. exists, and is drilled from the cutter head 30 in this embodiment. deer However, in other embodiments the tank may be made of metal welded to the cutter head 3o. Take it as a piece. In still other embodiments, the tank is attached to the cutter head. Formed by the q♀ part of the bolt.

During normal use, the side edges 54 of the arcuate slot 50 are spaced apart from the tongue 52 and edge 56(i) separated from tongue 52 when surface 44 engages upright ear 46; to limit the pivoting movement of the blade.

Thus, tank 52 is not subject to either wear or shock loads and is There will be no shearing forces or ruptures that are unknown to the user. When using the cutter head If the pivot connection between the blade 30 and the cutter blade 32 becomes disconnected, the cutter blade The blade flies radially outward under centrifugal force and engages the side edge 54 and the tongue 52. Therefore, it can be caught. The arcuate throwers 1 to 50 are arranged in the radial direction of the axis of the pivot bushing 34. Since it exists inward, any arbitrary point separated from the position crossed by reference numeral 58 in FIG. The engagement of the tongue with the side edge 54 in the position results in a detectable off-center load. Alerts the user and indicates when to de-energize or disconnect the main drive. of the present invention Another advantage of the arrangement is that both the cutter head and cutter blade have a simple construction. structure, and if desired, the cutter blade can be replaced by simply separating the pivot. For example, when the cutter tip 64 is fixed (Fig. 6), The advantage is that there is no need to disassemble the cutter head.

In one embodiment (not shown), the tank is located on the cutter blade, It is also possible to locate the slot in the cutter head.

The washer 38 has an arcuate slot 50 to prevent grass and dirt from coming into contact with the head 30 and the brake. This prevents the water from remaining between the The washer 38 also has an opening 39 52 and therefore prevent breakage if the pivot is severed or damaged. It can also act as an additional retention means for the card 32.

The cutter blade 32 has an aperture 6 () in which a weight means (not shown) is desired. Adjust the moment arm of the cutter plate 32 to suit the cutting conditions by tightening the C position μ accordingly. You can change it as you like. When weight is applied, the main drive is generally fibrous Upright edges 7 to remove weights as this increases the flying distance and danger zone 2.74 and an overlapping portion 76.78, the tip 64 of the crank member 70 A cutting surface 84 at a replaceable cutter tip 64 that has a notch in the forward direction. Avoid interfering with the action of

The cutter tip 64 is reversible, so that the second cutting 1 J1 portion 88 and the side and a second end 94 connecting edges 96,98.

The vertical edges 72.7/1 are spaced smaller so that the cutter tip 64 1.) between the edges 72 and 74 in the direct\γ direction via the trout part 88, preferably at the base. It can be introduced from the connection between the plate 66 and I.

Side edges 92.98. and side edges 90.96 each have a pair of axially spaced The knocks are connected by re-introduction notches 100 and 102 that form a gap between them. The cutter tip is subjected to centrifugal and tangential forces between the upright edges 72 and 740 axially It can be held against movement. The tip 64 is slid inward only a short distance. The cutter tip 64 first cuts the base member 66 so that it can be removed from the edge 74. It can be replaced without having to remove it from the machine.

In other embodiments, cutter tip 64 and overlap portion 78 include alignment holes. A removable holding member 104 can be housed therein, and this holding member is a weight means. can also act as nuts and bolts in any convenient form, such as nuts and bolts. The head 106 and flexible trunk 108 may be configured as shown. for example, a pair of diametrically opposed longitudinal slits (not shown). . The head 106 is configured to stop the relative movement of the tip 64 with respect to the blade 66. It is a means of During an operation of cutting vegetation using the cutting surface 84, the cutting surface 84 The direct load from the crank member 68 is distributed along the crank member 70 and It will be understood that under this load the pivoting movement of the cutter eE section 64 is restrained. . The substrate 66 is centered around the pivot 65 (not shown), and for example, the cut grass is placed in a collection bag. Close the air trough (not shown) to collect the air.

In other embodiments, the base plate 66 may include a fixed propeller blade and a rear portion 110 (FIG. 8). ) and safety front section 112 (FIG. 9). The rear skirt extends 3.5 cm below the plane of the radar 32, and the safety equipment The roof 124 of the rear section 110 is located 0.8 cm above the plane of the blade. vinegar It is recommended that the trimmer be kept at a slight angle to the sequential lateral baseline, with the end flush with the ground. Allows layers to approach and thus prevents effective cutting with a sufficiently deep skirt Cover yourself so you don't get caught.

In particular, if a loose object receives a severe impact, the blade will cut 110+: To limit the occurrence of several collisions, place the cutter blade tip and scarf between the circumferential ends. A gap of 2.5 cm is provided between the base plate and the base plate 122. Furthermore, arrow 130 in FIG. The cutter blade pivots in the direction shown in Figure 8A. As can be seen, the end 128 of the skirt 122 from which the cutter blade leaves last is Angled inward to prevent splashing around loose objects or the inside of the skirt. Stop. Thus, for a skirt with a diameter of 18 cm, the end 128 is 16.5+: The blade tip has an inner diameter of 1.m. It has a clearance of ocm.

In contrast, as best seen in FIG. 8B, the ends 132 extend outwardly by 20. 0 cm radius and extends 1.5 cm above the adjacent safety roof 124. The end 132 of the rear safety device 100 faces toward the user area. Creates an obstacle to protruding impact objects. Thus, it flies in the direction of the user's area. An end 132 that includes a rear surface 133 of the safety device This can be effectively prevented.

The rear of the safety device has three mounting holes 134 that attach to the rear cover section. Accommodates four fasteners 136 for removably fixing to the housing part 2 (Fig. 3) . Alternatively, in the embodiment of FIG. do. The loop 124 is solid, but in the pond embodiment is provided with an opening for safety. The rear part 110 of the device can also be made lighter.

As best shown in FIG. 9, the safety device front section 112 consists of a plurality of One part 47+ or 1 (11 times) with safety member 1111.116.118 (This avoids the need to replace all of the safety device M, i+'+ir section. . These members are cantilevered on the housing part 2 and are integrally attached to the housing part 2. resiliently located under the hoop 140, 142 formed as a ring and It is held by the lock 143. In other embodiments, the hoops may be separate and individual It can also be welded to the housing part 2.

Each of the safety members 114 (see FIGS. 3, 9, and 10) has a radial leg. The section 144a has a radial length of 6.0 cm and a vertical direction of 1.2. OCm's The enlarged portion 146a is divided by 52. Furthermore, the corresponding finger 148a is It extends 0.3 cm below the plane of the blade 32. Fingers 14 at the base The radial length of 8a is L 5 cm, and the lower edge is i, ocm. Ru. The radial spacing between the blade tip circle and this lower finger edge is L It is 5cm.

The safety member 116 (FIGS. 9 and 11) adjacent to the rear end 132 of the safety device is It has the same outer diameter (20 cm) as the end portion 132. Therefore, the enlarged portion 146b The radial length is 8.0 cm. Increase its vertical dimension to 3.5 cm and cover Maintain a distance of 0.8 cm from the blade plane. At the base and its lower edge The radial length of the fin force 148b is 3°5 cm, and the radial length of the fin force 148b is almost rectangular. Radial between blade tip circle and lower finger edge Reduce the vertical spacing to 1.0 cm. The lower finger edge is a cutter blade 32 extends 3.0 CIH below the plane of Thus, the two safety members 116 are All members 114 form a greater obstacle to loose flying objects, but the safety section The material 116 resides directly between the cutter blade 32 and the user area.

The legs 144C of the two safety parts + A118 are connected to the rear end 128 of the safety device and the first adjacent The two safety members 148 extend to the imaginary line 145 connecting the safety member 114 and the first adjacent safety member 114 at the radial end or wall. Make sure to form a line edge. The leg 144C has an angle, and the rotary cutting machine moves forward. When cutting, the vegetation that has healed on the wall to be cut is safely rotated to the cutter play 1 in the direction 32. to be done. Since the leg portion 144C has an angle, it is different from the blade tip circle. The radial spacing between the lower finger edge is reduced for the safety member 116 However, as mentioned above, the dimensions of safety member 118 match the dimensions of safety member 114.

To increase the strength, the safety member 118 is constructed as shown in FIG. 13 (described below). can be formed.

The cord 145 is at the tip of the cutter blade 32 for making cuts close to the "wall". To be closer to the end, end 128 has a reduced radius, in this example It is 17.0cm.

In other embodiments (not shown), safety member 118 may be of an entirely different length. and in use the member furthest from end 128 is longer and Curved apart to more easily cut grass and secure it into the path of the cutter blade. End 128 Cord 145 from generally contacts the tip of this member (but not to member 114). do not touch). Portion 4 118 as a pair of ponds is conveniently curved or flat. It can be made into a state.

From Figure 9, each safety member has a circumference b smaller than the spacing between adjacent fingers. The face width is C Niji, and the blade tip knuckle is adjusted to provide relief from between adjacent fingers. A tangentially propelled loose object has at least two legs 144 laterally. and up to five when propelled from a radially inward position of the tip zirkle. The leg 144 must be traversed. The spacing between adjacent fingers 148 is 5.0 cm. Must not be exceeded. Thus, the impact object can escape the safety device, but its motion The energy may e.g. 148 and/or both. Generally speaking, as a safety measure, this The skirt portion 122 at the rear of the safety device, which does not have any openings due to light, is a part of the cutter blade 32. (See Fig. 3), which extends below the rotating surface to a greater extent than the fingers 148. It prevents protruding bullets from rebounding below the skirt 122, and is used as a counter-attack. The safety member 114 prevents the strimmer from hitting the person and tilts the strimmer forward. Effectively cut plants that have been secured in between.

Fingers 148 form a first skirt portion, which in use is attached to the front of the cutting machine. and form the sides. The skirt portion 122 forms a second section without an aperture; Or have an opening small enough to prevent the object from passing through and causing damage to the user. section. The legs 144 connect the parts of the safety roof associated with the fingers 148. The remainder of the roof 124 cooperates with the skirt 122 as it forms.

In other embodiments, the strength is increased and the circumferential spacing between adjacent fingers is reduced. Since the safety part (1 piece bb< of J114.116.118 is Preferably f;1. It may be provided with three Fl-shaped wings 120 (FIG. 13). can.

For example, the front safety device is often used as a strimmer for nylon cords. 114, 116, and 118 should be removed so as not to interfere with the cutting action of the nylon cord. The rear safety device 110 can be left in place.

The safety device, in particular each safety part vJ114.116.118 is preferably Shatterproof, resilient and lightweight materials such as carbon or polycarbonate. be. The safety device is attached to the annular support circle q4200. This disk 200 is removed. The attachment has a slot 202 through which a retaining screw can be inserted. slot 202 is for rotational adjustment of the safety member and safety device rear part 110 relative to the housing 2. can be restricted to better protect the user area. Other embodiments (not shown) ), the disc 200 and the rear safety device 110 are formed as an integral device. be able to.

The present invention provides a non-flexible propeller or pivoting cutter blade and front and rear We proposed a rotary cutting machine equipped with a safety device equipped with a cantilevered safety member at the front. The rear part has a sufficiently deep skirt. Rotatable cutter blade Objects subjected to an impact greater than or equal to the maximum design cutting load of Due to the rotational speed requirements, the propeller-shaped cutter blade is thrown away at low speeds. Therefore, there is little damage to safety equipment. However, the rotatable cutter plate -1-nidenj-Jrui edition'! 7. The load is small and the cutter blade bends? Because of this, the shock load on the rotary cutting machine is reduced, and the stress load is also reduced. Therefore, maintenance requirements are reduced, and repairs and frequent equipment replacements are also reduced.

The cutter blade can flex, so the blade dulls more slowly and breaks. The tendency to tear is extremely low. In general, the present invention is a propeller with a rotating blade of nanometers. A replaceable cutter tip that can also be used for R-shaped blades and a replaceable cutter tip that can be used with different weights. means for replacing a moment arm of a pivoting cutter blade including a distal tip; A canter head that allows the swivel blade to be replaced without the need to dismantle the head. A cutter blade assembly incorporating a rotating blade and a separate holding means are provided. A means for preventing and retaining the blade itself from becoming a substance thrown away under centrifugal force. The cutter head and swivel bracket are designed so that the user is clearly aware of any damage to the pivot. A cutter blade assembly with It is convenient to remove and has higher safety than standards set by US authorities. We proposed safety measures that would allow users to cut vegetation effectively. Beaule Insert a spacer (not shown) between the base 18 (Fig. 3) and the bushing 118 to It is also possible to vary the blade height for different cutting heights. The dimensions above are It can also be varied to balance integrity and cutting efficiency.

Shorter blades with “baseline” safety devices give improved safety test results, but At the expense of cutting efficiency. 1. The skirt of the variable part is 4. OCm, and the vertical dimension of portion 116b is 4.0 cm. The radial length of the base of finger 148b (b and lower edge at J-3) [31,4, Oc+n, and the spacing between adjacent fingers is 4.0 cm. 133 can have a radial length of 8.0 cm and the adjacent From the safety roof 4. ocm. Safety elements 114.1 16. Some or all of 118 may be integrated with the support 200 to form a complete ring. It is also possible to form a shaped ring or provide a radial slit, i.e., to fragment it. can. The safety elements may not be paired, but may be integral or three-part, for example. Wear.

1-1111 《《《〉〉〉〉〉゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛゛ Throwing $ is 1 F,lG,2 Copy and translation of amended version) 1 pair published (Patent Law Article 184-7, Section 1 @ B. 61st year of death) July 26th Commissioner of the Patent Office Kuro 1) Akio 1. Display of patent application 3. Patent applicant Address: Singapore/Qm, 1129 Jalan Angus 255, Amendment 1 Submission date: t-7% February 2, 2015 GemJ/July 7, 2016) 6, attached 1 inch document inventory (1) Copy and translation of written amendment) Scope of request for correction ], comprising a roof and a skirt i~, the skirt having a frontage spaced apart in the circumferential direction. and a second section having no circumferentially spaced openings. In addition, the safety device includes a plurality of circumferentially spaced safety sections each having a fin force and a leg section. a non-airlift cutting machine comprising: a material; the fingers forming the first section; In safety devices for cutter blades rotating about their axis in , the legs form part of the roof, and the radial dimension of each leg is defined as its vertical dimension. to form an obstacle to objects thrown by the blade. A safety device featuring:

2. The safety device has a distance of 0.5cm to 3.0cm between the leg and the cutter blade. It has a safety device mounting part positioned so as to form a at least two tangents to the blade tip passage passing between the fingers. across the leg, the first section extending at an angle of less than 200' to the axis; Each finger is at least 0.5 cm above the plane of the cutter blade when in use and the skirt of the second section is 3.0 cm to 5 cm from the plane of the blade. ．． Claim 31J security device characterized by being located on the OcF'l side Place.

3, i 1 safety part (・, l and 2nd safety member and 3rd safety part (A and 4th safety part 4A) fi:i; Yes, the second safety member or the first safety part (larger leg and fin than Δ) the third safety member has a curved leg, and the fourth safety member has a circumferentially oriented leg. a section in which the second t-cushion extends radially outwardly and axially upwardly; The safety device according to claim 1, characterized in that the safety device is provided at one end (part) of one circumference. .

4. The safety device is characterized by being made of lightweight, shatterproof and elastic material. A safety device according to claim 1.

5. Each of the safety members is characterized by a snap-fitting catch. A safety device according to claim 1.

6. Safety part used in the safety device according to any one of claims 1 to 5. Material.

7. In a housing member for a rotary cutting machine equipped with a support for a safety device, the support The body has multiple upright hoops each removably housing a safety member. A housing member characterized by:

8. The safety device and the support body are integrally formed, and the support body can be detached when the safety device is cut. Claim 7, characterized in that it is provided with a fixing means adapted to fix the device. Housing member for rotary cutting machine.

9. A cutter head that can rotate around FIHi and a cover that has a cutting surface. Rotate the cutter blade and the cutting surface of the cutter blade between this blade and the head. The cutter blade can be pivoted outward from the cutter head under centrifugal force during rotation. When the rate is placed on the cutter head and the rotating mounting part is lost, 1) Upon loss of the hook attachment part that can be engaged under centrifugal force, A cutter for a rotary cutting machine, comprising an engageable cutter and holding means on a bed. - In the blade assembly, the retaining means is a tongue capable of engaging the edge of the slot. The cutter head has one side of the tank and the slot, and the cutter blade has a A cutter blade assembly comprising a tank and a slot.

10. Limit the permissible pivoting movement of the cutter blade to prevent the slot from rotating. The cap according to claim 9, characterized in that the end portion prevents engagement of the tongue. Turblade.

11.Claim 9 or claim 1, wherein the cutter blade has an arcuate slot. A cutter blade for use in the cutter blade assembly according to item 10.

12. A cutter head that can rotate around a drive axis, and this cutter head A cutter blade for a rotary cutting machine, which is equipped with a cutter blade rotatably attached to the The board assembly shall be provided with means for attaching a weight to allow adjustment of the moment arm. A cutter blade assembly characterized by the ability to cut.

13. Claim No. 1 characterized in that the weight attachment means comprises a clip attachment means. The cutter blade assembly according to clause 12.

14. Attach the canter blade to the base member and attach the base member to the cutter head. It is assembled by attaching the weight to the base part A3 so that it can rotate freely, and attaching the weight to the base part A3 and freely attaching it to the IB2. Claim 1, characterized in that it comprises means capable of adjusting the moment arm of the body. Cutter blade assembly with 12 peaks.

15. A cutter plate that is rotatable around an axis and has a cutting surface. with a cutter blade consisting of a pair of upright radially spaced members. means for removably attaching the assembly to the assembly, one of the members facing the cutting surface; The cutter 7 is engaged with the first edge of the rod, and the other of the members is opposed to the first edge. contacting a second edge of the cutter blade facing toward but radially spaced from the cutting surface. In a cutter blade assembly configured for rotation i;7J cutting, the cutter -The blade fixes one of the first parts and when rotating, the cutter blade is subjected to centrifugal force. characterized by comprising at least one re-introduction notch adapted to be held against the cutter blade assembly.

16. For use with the cutter blade assembly of claim 15. cutter blade.

17. A rotatable cutter head, a drive means for this cutter head, and a brake Cut the cutter so that the cutting surface on the board projects radially outward beyond the cutter head. The cutter blade is rotatably mounted on the cutter head and separated from the rotary mounting position. When the cutter blade is used, the cutter blade engages with the cutter blade. means on the cutter head for preventing the cutter head from collapsing; A rotary cutter consisting of an internal cutter blade or safety means with a rotating skirt. Cutting machine.

international search report 1 “#” “A” 31 “”” PCT/GB 85100544111 Italy +111 1 is 11A6I+IMMNo, l’cT/GBEIS100544ANNEX TorHE INTERNATIONAL 5EARCHREPORT ON

Claims (26)

[Claims] 1. a roof and a skirt, the skirt having circumferentially spaced apart openings; and a second section having no openings spaced apart in the circumferential direction. In the cutter blade safety device of non-airlift type cutting machines, a plurality of circumferentially spaced safety members each having a loop finger and a leg; The fingers form the first skirt portion and the fingers form the first skirt portion. safety equipment. 2. characterized in that each safety member has a circumferential width that is less than the spacing between adjacent fins; 2. The safety device according to claim 1, wherein: 3. The safety members are formed in pairs and include resilient snap-fit catches. The safety device according to claim 1, characterized in that: 4. A blade tip passageway separating adjacent fingers and passing between the fins. Claim 1, characterized in that a tangent to the leg crosses at least two legs. Safety device described in item 1. 5. The second section is located halfway between the circumferentially spaced ends of the blade tip passageway. Claim 1, characterized in that they are spaced radially outwardly by at least 2 cm. Safety equipment listed. 6. A first safety member, a second safety member, and a third safety member, wherein the second safety member is the first safety member. The third safety member has a leg portion larger than the safety member, and the third safety member has a curved leg portion. The safety device according to claim 1, characterized in that: 7. The radial dimension of each leg is larger than its vertical dimension, and Claim 1, characterized in that it forms a substantially rectangular obstacle to an object that is Safety devices listed in section. 8. that the first section extends at an angle of less than 200° with respect to the axis of the safety device; A safety device according to claim 1, characterized in that: 9. The second section includes an outwardly extending portion at one circumferential end. The safety device described in item 1 of the scope of requirements. 10. Safety used in the safety device according to any one of claims 1 to 9 Element. 11. A cutter having a cutter head that can rotate about an axis and a cutting surface When the blade and the cutting surface of the cutter blade rotate, Cut the cutter blade so that it can pivot outward from the cutter head under centrifugal force. The rotating mounting part is located on the cutter head and the centrifugal force generated by the cutter blade is retaining means on the cutter head which can be engaged in the event of loss of said pivot mount below; A cutter blade assembly for a rotary cutting machine comprising: a retaining means for a rotary cutting machine; A tongue that can engage the edge of the rod, with the cutter head attached to one side of the tongue and the slot. and the cutter blade has the other side of the tongue and a slot. A cutter blade assembly featuring: 12. The slot has an arc shape, and its center is located in the pivot mounting part, and the slot Claims characterized in that said portion is located between the pivot mount and said axis. The cutter blade assembly according to clause 10. 13. A pivoting tool is provided with contact means for limiting the permissible pivoting movement of the cutter blade. The invention is characterized in that the tongue is prevented from coming into contact with the end of the slot when the tongue is rotated. A cutter blade assembly according to range 11. 14. Claims 11 to 13, wherein the cutter blade has an arcuate slot. A cutter blade for use in the cutter blade assembly according to any of paragraphs. 15. A cutter head that can rotate around a drive axis and this cutter head and a cutter blade rotatably attached to the cutter head. In a cutter plate assembly for a rotary cutting machine, the cutter plate is Equipped with a means for removably attaching weights to the board to suit different cutting conditions. A cutter plate characterized in that the moment arm of the cutter blade can be adjusted. Reid aggregate. 16. A cutter having a base member rotatable about a drive axis and a cutting surface. a cutter blade and means for removably attaching the cutter blade to the cutting surface. and the means includes a pair of upright axially spaced members, one of the members being a first edge of the cutter blade opposite the cutting surface; a cutter plate with the other side of the material facing the first edge but spaced axially from the cutting surface; a cutter blade assembly for a rotary cutting machine configured to contact a second edge of a blade; at least one cutter blade supporting one of the members; Equipped with several re-entry notches to hold the cutter blade against centrifugal force during rotation. A cutter blade assembly characterized by: 17. A cutter for use with the cutter blade assembly of claim 16. - Plaid. 18. a rotatable cutter head, a drive means for the cutter head, Cover so that the cutting surface on the blade projects radially outward beyond the cutter head. The cutter blade is rotatably mounted on the cutter head and the cutter blade is rotatably mounted on the cutter head. By separating and engaging the cutter blade, the cutter blade is means on the cutter blade for preventing disengagement from the cutter head; A rotary cutting machine with a safety measure in which the cutter head has a skirt that rotates inside. 19. The safety member of the first section is integral with and attached to the partial annular support. The safety device according to claim 1, wherein the safety device projects radially outward from the safety device. Place. 20. Equipped with a safety device mounting part and a cutter blade mounting part, the safety device mounting part is attached to the leg. so as to form a gap in the range of 0.5 to 3.0 cm between the part and the cutter blade. The safety device according to claim 1, characterized in that the safety device is located at 21. Equipped with mounting means for the safety device and cutter blade mounting means, the safety device When using the mounting section, each finger should be less than the plane of the cutter blade. Claim No. 1, characterized in that both are located 0.5 cm above Safety device described in item 1. 22. It has a safety device mounting part and a cutter blade mounting part, and the safety device mounting part is The two-section skirt is 3.0cm to 5.0cm above the plane of the plaid. The safety device according to claim 1, characterized in that the safety device is located below the ceiling. All equipment. 23. The safety device is characterized by being made of lightweight, shatterproof and resilient material. A safety device according to claim 1. 24. Housing for a rotary cutting machine with a safety device and a support for this safety device In the member, each of the supports is capable of attaching and detaching the safety member described in claim 10. a housing portion comprising a plurality of upright hoops adapted to be housed in the housing portion; Material. 25. Housing for a rotary cutting machine with a safety device and a support for this safety device In the member, the safety device and the support are integrally formed, and the support cuts the support. A housing member comprising a fixing means that can be detachably fixed to a cutting machine. 26. Housing for a rotary cutting machine with a safety device and a support for this safety device In the member, one of the safety device and the support is provided with an elongated aperture of a common radius to a fixing member, and a fixing member positioned along and within the aperture. means for positioning and adjusting the circumferential position of the safety device relative to the support. Housing member for rotary cutting machine.