JPH0238611Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a power cutting tool for gardening and the like.

Power cutting tools such as cutters for gardening, mowing, etc., include Japanese Utility Model Publication No. 54-3075 and Utility Model Publication No. 52-122231.
As described in the above publication, a brush cutter with a safety cover attached thereto has been devised. However, in these cases, the bottom side of the cutting tool is not covered and is exposed, so it is dangerous if the power cutting tool is suddenly driven, and even when stored in the specified location, the exposed cutting tool This could damage the storage section, or other objects could come into contact with the exposed cutting tool and damage the cutting section. Furthermore, when the safety cover is attached to the case, the cutting tool cannot be easily replaced.

Therefore, with conventional tools, there was a lack of consideration for safety during storage, and when cutting, there was a risk of cutting other than the designated area, which caused problems with workability. The problem was whether it would be possible to cover the cutting tool with a safety cover to increase safety, and to easily replace the cutting tool even though the cutting tool is covered with a safety cover.

The present invention was developed in consideration of the above-mentioned problems, and in order to solve the above-mentioned problems, a safety cover is provided which is formed by a fixed cover part fixed to the cutting part of a cutting tool such as a cutter and a movable opening/closing cover part. In power cutting tools for gardening, etc., which cover the cutting part with a movable opening/closing cover part that can be opened and closed freely, the fixed cover part of the safety cover is attached to the bottom of the case that covers the side circumferential surface of the cutting tool. The bottom cover is formed so that the cutting tool is housed therein, and the opening/closing cover part of the safety cover is formed in the shape of a thin arc-shaped box, so that the cutting part of the cutting tool that protrudes and is exposed from the fixed cover part is housed inside. The cutting part can be rotated along the circumference of the cutting tool to freely open and close, and the opening/closing cover part can be freely locked in a half-open state at a predetermined intermediate position, such as a 90 degree rotation position, with the safety cover. To provide a power cutting tool for gardening, etc., characterized in that the fixed cover part of the safety cover is removably inserted into a narrow groove recessed in the inner peripheral surface of the bottom of the case. It is in.

The present invention will be explained below based on examples.

Figure 1 and subsequent figures show one embodiment of the present invention, which was implemented in a portable power cutting tool for gardening.

As shown in FIGS. 1 and 2, the power cutting tool 1 has a case 2 formed by joining half bodies molded from a resin material, and has an operation section 3 at the rear that can be grasped with one hand, and a slightly bulged front section that can be used to control direct current. The power unit 7 includes a motor drive device 4, a reduction drive device 5, a fan 6, etc., and a cutting tool 9 such as a disc-shaped cutter with a predetermined diameter can be detached from the output shaft 8 of the reduction drive device 6. It is attached to the machine and is configured so that it can be rotated at a predetermined number of rotations for cutting. The case 2 surrounding the cutting tool 9 is formed so that the cutting tool 9 protrudes by a predetermined amount at the front as shown in FIG. The safety cover 12 is inserted into and removed from the downwardly projecting projection 10 with a narrow recessed groove 11 formed therein. The safety cover 12 is made of stainless steel or the like, and as shown in FIG. 2, an arc-shaped opening/closing cover part 14 is pivotally attached to a thin semicircular fixed cover part 13 so as to be pivotable within a predetermined range. It is formed by The fixed cover part 13 is formed slightly larger than a semicircle as shown in FIG. 3, and has two V-shaped notches 15 on the front side.
The locking portions 16 of the rectangular protrusions provided in the grooves 11 are engaged with each other to securely fix the device in a predetermined position. The locking part 17 is cut and raised so that it elastically engages with the step part 18 stepped on the rear end side of the protruding part 10 of the case 2, so that it can be detachably attached to the case 2 without tools. That's what I do. On the other hand, the opening/closing cover part 14 is formed into a thin arc-like box shape as shown in FIGS. 5 and 6, and the cutting part 19 of the cutting tool 9 is placed inside the thin box as shown in FIG. I'm trying to put it on. The thin box-shaped bottom plate 20 of the opening/closing cover part 14 is extended to the center as shown in FIG. 5, and the center is burred to form a turning protrusion 21. 21 to fix the cover part 13
The opening/closing cover part 14 is fitted into a center hole 22 opened at the center of the cutting tool 9 so as to be pivotable in the circumferential direction of the cutting tool 9. Further, a locking protrusion 23 is protruded from one end of the bottom plate 20 of the opening/closing cover part 14 as shown in FIG. . I try to do that. Opening/closing cover part 14
As shown in FIGS. 5 and 6, the bottom plate 20 is further provided with a locking cutout piece 26 protruding downward by cutting out a portion of the bottom surface of the bottom plate 20, as shown in FIGS. The protruding locking cutout piece 26 comes into contact with the end of the fixed cover part 13 when it is turned, so that the opening/closing cover part 14 can be cut in a half-open state. Reference numeral 27 is an opening/closing operation piece for opening and closing the opening/closing cover part 14, which also serves as a contact with the object to be cut.
28 is a piece protruding by pressing the lower surface of the opening/closing cover part 14 inward to prevent cutting waste from entering inside, 29 is a connection cord for power supply, and 30 is a cutting tool operating switch.

Therefore, if the opening/closing cover part 14 of the safety cover 12 is turned and fully closed as shown by the dashed line in FIG. 2, the cutting tool 9 can be completely covered with the safety cover 12 as shown in FIG. 1. . Therefore, during storage, it is possible to prevent the storage part from being damaged by the cutting part of the cutting tool, and it is also possible to prevent other articles from coming into contact with the cutting part and being damaged, thereby providing protection.

Moreover, if the opening/closing cover part 14 is turned half-open by approximately 90 degrees as shown in FIG. The protrusion 23 is the fixed cover part 1
3, the locking cutout piece 26 of the opening/closing cover part 14 comes into contact with the end surface of the fixed cover part 13 and can be locked in a half-open state, and is perpendicular to the center line direction of the power cutting tool 1. It is possible to cut the workpiece in any direction.

Further, when the locking cutout piece 26 is pushed inward to release the contact with the fixed cover part 13, and the opening/closing operation piece 27 is used to fully open the opening/closing cover part 14 as shown in FIG. With the same attitude as above, the workpiece can be cut in the direction of the center line of the power cutting tool 1, which is substantially perpendicular to the above.

In this embodiment, the opening/closing cover part can be opened and closed in two ways, half-open and fully open, as described above, and can be cut, making it suitable for gardening as it can cut ginger stems from any direction without damaging the main body. In addition, even when the opening/closing cover part is opened, the opening/closing cover part can be rotated and accommodated on the fixed cover part side, so that it does not get in the way of cutting and the work can be carried out efficiently. In particular, because the parts that are not necessary for cutting with the cutting tool are completely enclosed and housed within the safety cover, unlike conventional products, it is possible to accidentally cut a part other than the desired part with the exposed part that is not necessary for cutting with the cutting tool. This allows the user to work safely and reliably without injuring the user's fingers or the like.

Furthermore, in this embodiment, the elastic locking part of the safety cover is elastically engaged with the stepped part of the case to allow insertion and removal, so the safety cover can be easily and quickly attached to a power cutting tool without using any tools. or attach it to
It can be removed and the cutting tools can be easily replaced.

In addition, in the above embodiment, the opening/closing cover part was designed to open and close fully open, half open, and fully close, but a locking part, a locked part, etc. may be added as appropriate to lock it at an appropriate angle. It can also be freely cut. Furthermore, although the opening/closing cover section is designed to be opened on one side, it can also be constructed so that it can be opened on both sides.

In the above embodiments, a power cutting tool for gardening was explained, but it can also be applied to metal materials, resin materials, wood, mowing tools, and grinding tools, and the drive method is limited to electric. Instead, it may be battery-powered or petroleum engine-powered.

As described above, in the present invention, safety can be maintained even if the power cutting tool is suddenly activated by covering the cutting tool with the safety cover that is in the interior state, and the safety cover is also covered. Nevertheless, since the cutting part can be opened and closed freely, desired cutting can be performed. In particular, since the parts of the cutting tool that are not needed for cutting can be completely housed within the safety cover, there is no risk of accidentally cutting other than the desired part or injuring the user's fingers. Work can be done safely and reliably. In addition, since the cutting tool can be covered with a safety cover even when stored, the storage area will not be damaged, and the risk of other objects coming into contact with the cutting tool and damaging the cutting area can be prevented, providing protection. It is something. Furthermore, by inserting and removing the fixed cover portion of the safety cover into the recessed groove of the case, the cutting tool can be inserted into or removed from the case, and the cutting tool can be easily replaced.

[Brief explanation of the drawing]

1 and 2 are a partially omitted side sectional view and a bottom view of an embodiment of the present invention, and FIGS. 3 and 4 are a bottom view and an elastic locking portion of the fixed cover portion of the same safety cover. 5 and 6 are a plan view and a side view of the opening/closing cover portion of the safety cover, respectively.
FIG. 7 is a bottom view for explaining the use of the safety cover with a portion omitted from the same as above. 1... Power cutting tool, 9... Cutting tool, 12...
Safety cover, 13... Fixed cover part, 14... Opening/closing cover part, 19... Cutting part.

Claims (1)

[Scope of claim for utility model registration] Covers a safety cover formed by a fixed cover part fixed to the cutting part of a cutting tool such as a cutter and a movable opening/closing cover part, and the movable opening/closing cover part can be freely opened and closed to the cutting part. In power cutting tools for gardening and the like, the fixed cover part of the safety cover is formed into a bottom lid shape so that the cutting tool is housed at the bottom of the case that covers the side surface of the cutting tool. Opening and Closing of the Cover The cover part is formed into a thin arc-shaped box shape and rotates along the circumference of the cutting tool to open and close the cutting part so as to accommodate the cutting part of the cutting tool that protrudes from the fixed cover part and is exposed. At the same time, the opening/closing cover part is placed on the safety cover so that it can be freely locked in a half-open state at a predetermined intermediate position such as a 90 degree rotation position, and the fixed cover part of the safety cover is placed inside the bottom of the case. A power cutting tool for gardening, etc., characterized in that it is removably fitted into a narrow groove recessed in the circumferential surface.