JP3000700U - Circular saw blade attachment device and high branch cutting - Google Patents

Abstract

(57) [Summary] [Objective] To provide a circular saw blade attachment device suitable for high branch cutting that can be easily cut with a stable posture even in the case of hard trees such as cypress. [Structure] The rotation of an output shaft 3a of a motor 3 is transmitted to a pair of bevel gears 4a and 4b via a propeller shaft 1,
This is a device in which a circular saw blade 10 is attached to one end of a shaft 6 that rotates integrally with a driven side bell gear 4b. A male screw 6b is provided on one end of the shaft 6. The circular saw blade 10 is provided with a screw member 9 which is screwed to the male screw 6b on the central side surface of the circular saw blade 10.
It is welded to the side where the screw is tightened by the rotation of. [Effect] The circular saw blade 10 can be easily and easily attached and detached, and the circular saw blade attaching device can be made compact.
Weight reduction is possible.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a circular saw blade attachment device suitable for high branch cutting, for example, and a high branch cutting device equipped with this circular saw blade mounting device.

[0002]

[Prior art]

 Conventionally, in the case of twigs, a pruning clip was attached to the tip of a long rod, and a string or wire was pulled from below to move the pruning clip to cut off the branches. In the case of thick branches, it was common to attach a saw to the end of a long rod and push and pull the rod to cut off the branch.

[0003]

[Problems to be solved by the device]

 However, both of the above-mentioned high branch cutting have some problems in stability during pruning, and in the case of cutting thick branches by pushing and pulling with a saw, especially in the case of hard trees such as cypress, 5 to 5 It is best to cut 6 pieces.

The present invention has been made in view of the problems in the above-mentioned conventional high branch cutting, and particularly in the case of a hard tree such as cypress, it has a stable posture, and easily in a short time. An object of the present invention is to provide a circular saw blade attachment device suitable for high branch cutting capable of cutting and a high branch cutting provided with this circular saw blade attachment device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the circular saw blade mounting device of the present invention transmits the rotation of the output shaft of the motor to a pair of gears via a power transmission shaft and rotates integrally with the driven gear. A device for mounting a circular saw blade on one end of a shaft, wherein one end of the shaft is provided with a male screw or a female screw, and the side center shaft of the circular saw blade is screwed with the male screw or the female screw. The mating screw member is welded to the side where the screw is tightened by the rotation of the circular saw blade.

Further, the high branch cutting of the present invention includes a motor installed at a tip portion of a grip rod having a predetermined length and a drive side for transmitting rotation of an output shaft of the motor through a power transmission shaft. The gear, the shaft to which the driven-side gear that meshes with this drive-side gear is externally fitted in a two-face contact state with its inner peripheral surface and one side surface, and the male screw provided on the other side of this shaft. A structure comprising a spring for compressing the driven side gear from the other side surface side by being compressed by a nut member to be screwed and a circular saw blade mounting device of the present invention installed at one end of the shaft; I am doing it.

[0007]

[Action]

 The circular saw blade attaching device of the present invention transmits the rotation of the output shaft of the motor to the pair of gears via the power transmission shaft, and mounts it on one end of the shaft that rotates integrally with the driven gear. Or a female screw is provided, and a screw member that is screwed to the male screw or the female screw is welded to the side central shaft of the circular saw blade on the side where the screw is tightened by the rotation of the circular saw blade. The circular saw blade may be attached to or detached from the shaft only by screwing a screw member into a male screw or a female screw provided at one end of the shaft or loosening the screw.

In addition, the high branch cutting of the present invention includes a motor installed at the tip of a grip rod having a predetermined length, and a drive side for transmitting rotation of an output shaft of the motor through a power transmission shaft. The gear, the shaft to which the driven-side gear that meshes with this drive-side gear is externally fitted in a two-face contact state with its inner peripheral surface and one side surface, and the male screw provided on the other side of this shaft. It is configured to include a spring that is compressed by a nut member that is screwed and that biases the driven-side gear from the other side surface side, and the circular saw blade mounting device that is installed at one end of the shaft. Therefore, the rotation of the output shaft of the motor is transmitted to the circular saw blade via a pair of gears, shafts, and so on. Also, when the load during tree pruning becomes large, the contact surface between the shaft and the gear on the driven side slips, so the motor is not burned.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A circular saw blade attaching device and a high branch cutting device according to the present invention will be described below based on an embodiment shown in the accompanying drawings. FIG. 1 is an explanatory view showing an embodiment of a circular saw blade attaching device of the present invention and a high branch cutting equipped with the circular saw blade attaching device, and FIG. 2 shows high tree pruning using the high branch cutting device of the present invention. It is a figure showing the state where it is.

In the drawings, reference numeral 1 is a power transmission shaft, for example, a propeller shaft, one end of which is an output of a motor 3 attached to a tip portion of a grip rod 13 having a predetermined length (for example, about 5 m) via a joint 2. A bevel gear 4a on the drive side is attached to the other end, which is connected to the shaft 3a. The length of the propeller shaft 1 is, for example, about 50 cm, and an appropriate portion in the longitudinal direction is supported by, for example, a slide bearing 5 to prevent runout.

Reference numeral 4b denotes a driven-side bevel gear which is paired with the driving-side bevel gear 4a. The driven-side bevel gear 4b has a shaft 6 supporting the driven bevel gear 4b and one of its inner peripheral surface (both portion 4ba). The side is attached so as to be externally fitted in a two-face contact state with the side face.

A male screw 6a is provided on the other side of the shaft 6, and a nut member 7 screwed to the male screw 6a is screwed to compress the coil spring 8 fitted to the shaft 6, for example, to drive the driven member. The side bevel gear 4b is pressed and urged from the other side surface side so that the driven side bevel gear 4b and the shaft 6 are integrally rotated.

Further, for example, a male screw 6b is provided at one end of the shaft 6, and a screw member 9 provided with a female screw 9a to be screwed to the male screw 6b is welded to a side central shaft portion of the circular saw blade 10. There is. By the way, the side surface of the circular saw blade 10 on which the screw member 9 is welded is the side surface on which the screwing of the male screw 6b and the female screw 9a is tightened by the rotation of the circular saw blade 10.

Reference numeral 11 denotes a slide bearing that supports the other end portion of the shaft 6, and reference numeral 12 denotes an outer circumference of the boss portion 4ba of the bevel gear 4b on the driven side and a vertical surface on the back surface side of the bevel gear that is continuous with the boss portion 4ba. It is a sliding bearing which is in contact with two surfaces and supports the shaft 6 via a bevel gear 4b on the driven side. 6c is a head formed on the other end of the shaft 6.

In this embodiment, a male screw 6b is provided on one end of the shaft 6, and a female screw 9a screwed to the male screw 6b is provided on the screw member 9 welded to the side face central shaft of the circular saw blade 10. Although shown in the above, a female screw may be provided at one end of the shaft 6 and a male screw may be provided at the screw member 9. Further, in the present embodiment, the coil spring 8 is shown as the spring for urging the bevel gear 4b on the driven side against the shaft 6, but a disc spring may be combined. Furthermore, although bevel gears 4a and 4b are shown as gears, spur gears may be used.

The circular saw blade attaching device of the present invention and the high branch cutting equipped with the circular saw blade attaching device have the above-mentioned constitutions, and the method of pruning a tree by attaching the circular saw blade 10 to the high branch cutting will be described below. And a method for removing the circular saw blade 10 from the high branch cutting after pruning will be described.

First, in order to attach the circular saw blade 10 to the high branch cutting, it is only necessary to screw the screw member 9 onto the male screw 6b provided at one end of the shaft 6. After mounting the circular saw blade 10 in this way, the outlet of the motor 3 is plugged into the power supply and the output shaft 3a of the motor 3 is rotated. This rotation causes the joint 2, the propeller shaft 1, and the pair to rotate. It is transmitted to the circular saw blade 10 through the eggplant bevel gears 4a and 4b and the shaft 6. At this time, since the circular saw blade 10 rotates in the direction in which the male screw 6b and the female screw 9a are screwed together, the circular saw blade 10 does not come off the shaft 6.

Therefore, when the circular saw blade 10 is thus rotated, as shown in FIG. 2, if the circular saw blade 10 is pressed against the branch to be pruned with the gripping rod 13, it will be easy and easy. It can be pruned. At this time, if the branch is hard or the pressing force is too large, the contact surface between the shaft 6 and the bevel gear 4b on the driven side slips, so that the motor 3 is not seized.

Next, when the circular saw blade 10 is removed from the shaft 6 after the pruning is completed, the circular saw blade 10 is fixed so as not to rotate by stepping on the side surface of the circular saw blade 10 and then the male screw 6b. It suffices to rotate the head portion 6c of the shaft 6 with a spanner, for example, in a direction in which the screwing of the screw member 9 loosens.

[0020]

[Effect of device]

 As described above, in the circular saw blade attaching device of the present invention, since it is only necessary to screw the screw member to the male screw or the female screw provided at one end of the shaft, the circular saw blade can be easily attached and detached. The circular saw blade mounting device can be made compact and lightweight.

In addition, the high branch cutting equipped with the circular saw blade attaching device of the present invention is compact and light in weight, so that a stable posture makes high tree pruning easy and easy in a short time. You can do it.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a circular saw blade attaching device of the present invention and a high branch cutting equipped with the circular saw blade attaching device.

FIG. 2 is a view showing a state in which high tree pruning is performed using the high branch cutting of the present invention.

[Explanation of symbols]

 1 Propeller shaft 3 Motor 3a Output shaft 4a Driving side bevel gear 4b Driven side bevel gear 6 Shaft 6b Male screw 7 Nut member 8 Coil spring 9 Screw member 9a Female screw 10 Circular saw blade 13 Gripping rod

Claims (2)

[Scope of utility model registration request] 1. A device for transmitting rotation of an output shaft of a motor to a pair of gears via a power transmission shaft, and attaching a circular saw blade to one end of the shaft that rotates integrally with a driven gear. There, a male screw or a female screw is provided on one end of the shaft, and a screw member that is screwed to the male screw or the female screw is attached to the side center shaft of the circular saw blade, and the screw is tightened by the rotation of the circular saw blade. A circular saw blade attachment device that is welded to the side. 2. A motor installed at the tip of a grip rod having a predetermined length, a drive-side gear for transmitting the rotation of the output shaft of the motor via a power transmission shaft, and a drive-side gear. The driven gear that is meshed is compressed by a shaft for externally fitting the inner peripheral face and one side face in a two-face contact state, and a nut member that is screwed into a male screw provided on the other side of the shaft. A high branch cutting device comprising: a spring for urging a drive-side gear from the other side face side; and a circular saw blade mounting device according to claim 1, which is installed at one end of the shaft.