JPH0731213U - Cutting equipment - Google Patents

Abstract

(57) [Summary] [Objective] A stand pole equipped with a rack, and a pinion that is slidably supported by the stand pole and that is engaged with the rack, and a boss that is integral with the pinion are slidably inserted in the radial direction. In a cutting device including a sliding device having rod-shaped handles with retaining heads on both ends and a core drill attached to the sliding device, the turning operation of the handle during cutting feed is more than that of the conventional device. Also make it easy and quick. [Structure] A weak coil spring 11 having the same strength is attached to both sides of the boss portion 8 of the handle 3 slidably fitted in the boss portion 8. When the hand is released from the handle 3, the coil spring 11 acts by the action of the coil spring 11. The central portion of is supported by the boss portion 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting device including a stand pole and a power tool such as a core drill slidably supported along the stand pole.

[0002]

[Prior art]

 As a cutting device of this type, as shown in FIG. 1, a stand pole 2 having a rack 1 and a roller for sliding on or rolling the stand pole 2 are slidably supported by the stand pole. , A sliding device 4 having a pinion (not shown) meshing with the rack 1 and a handle 3 for rotating the pinion, a core drill main body 6 equipped with a motor 5 and attached to the sliding device 4, and detachable from the main body 6. It consists of a core drill 7 that is attached so that it can be rotationally driven by a motor 5, and at the time of cutting, the pinion rack can be rotated by rotating the handle 3 while pressing the rotationally driven core drill 7 against the surface to be cut. There is known a type in which cutting feed is carried out through.

In such a device, the handle 3 has a rod shape and is slidably fitted into the boss portion 8 of the pinion, and has the retaining heads 9 at both ends thereof. During operation, normally, the upward head 9 is grasped and pulled up until the downward head 9 comes into contact with the boss portion 8, and with the turning radius of the handle 3 extended, the pushing operation is performed by the action of the lever. After rotating and pushing backward, the head 9 that has turned upward is pulled up again and the same operation is performed.

[0004]

[Problems to be solved by the device]

 In the conventional device described above, it is necessary to pull up the handle, which is in the state of being pressed down until the head hits the boss, and extend it to the opposite side every time the handle is half-turned during cutting feed. An object of the present invention is to provide a cutting device in which the handle can be operated more easily than the conventional one during cutting feed.

[0005]

[Means for solving the problem]

 Therefore, the cutting device of the present invention has a stand pole provided with a rack and a pinion that is slidably supported by the stand pole and that is fixed to the pinion or that is integrally formed with the pinion. On both sides of the boss in a cutting device that consists of a sliding device that is slidably inserted into the slide device and that has rod-shaped handles with heads for retaining at both ends, and a cutting tool that is attached to the sliding device. It is characterized in that a coil spring of the same strength is attached to the handle that protrudes to the inside.

[0006]

[Action]

 In the normal state, the handle is supported by the boss portion at its central portion by the action of the coil springs attached to both sides of the boss portion. When rotating the handle, pull up and rotate the handle so that the coil spring located on the lower side is compressed. When the handle is released and the hand is released from the handle, the handle protrudes upward due to the action of the compressed spring and restores, and the center part is located at the boss part.

[0007]

【Example】

 FIG. 2 shows that the handle 3 is slidably inserted into the boss 8 of the pinion 10, and the handle 3 is supported on both sides of the boss 8 of the handle 3 such that the coil length when fully extended is supported by the boss 8 at the center. A coil spring 11 having the same length as the boss portion and the same strength is attached. When the handle 3 is rotated during cutting feed, the head 9 on the operating side is grasped and the position indicated by the solid line in FIG. Then, the lower coil spring 11 is compressed and pulled up, and a half-turn rotation operation is performed up to the one-dot chain line position. After pushing to the position indicated by the alternate long and short dash line, release the handle 3 and repeat the same operation as above.

[0008]

[Effect of device]

 The cutting device of the present invention is configured as described above, and when the hand is released from the handle, the handle always tries to return to the position where the central part is supported by the boss due to the action of the coil spring, so the handle is held during cutting feed. It will be easy and quick to pull up.

[Brief description of drawings]

FIG. 1 is a front view of a conventional cutting device.

FIG. 2 is a front view of a handle provided in the cutting device according to the present invention.

FIG. 3 is a front view showing a state when a handle is rotated.

[Explanation of symbols]

1 ... Rack 2 ... Stand pole 3 ... Handle 4 ... Sliding device 5 ... Motor 6 ... Core drill main body 7 ... Core drill 8 ... Boss part 9 ... Head 11 ... Coil springs

Claims (1)

[Scope of utility model registration request] 1. A stand pole having a rack, and a pinion slidably supported by the stand pole and fixed to the rack and a boss portion fixed to the pinion or integrally formed with the pinion so as to be slidable in the radial direction. In a cutting device consisting of a sliding device equipped with rod-shaped handles with retaining heads on both ends and a cutting tool attached to the sliding device, the same strength is applied to the handles protruding on both sides of the boss. A cutting device equipped with the coil spring.