JPS59124504A - Electromagnetic drilling machine of portable type - Google Patents

Abstract

PURPOSE:To enable the electromagnetic attractive force to be increased with the same capacity of a machine, by guiding exhaust from a drill main unit to a silencer chamber provided in an electromagnet bed board so as to both silence a noise of the exhaust and cool the electromagnet bed board by the exhaust. CONSTITUTION:A socket 15 used for mounting a drill main unit 1 to a slide rod 12 is formed in a hollow shape, and exhaust is guided into the socket 15. While the inside of the slide rod 12 is formed in a cylindrical shape toward the bottom, allowing the exhaust guided into said socket 15 to flow down in the slide rod 12. Then the exhaust, flowing down in the slide rod 12 is discharged from a delivery port 17 provided in a front position of the bed board 7 after being guided into a silencer chamber 16 provided in the upper part of an electromagnet bed board 7. In this way a noise of the exhaust from the drill main unit 1 can be silenced and also electromagnetically attractive force can be increased with the same capacity of the drill by cooling said bed board 7 by the same exhaust.

Description

DETAILED DESCRIPTION OF THE INVENTION When a pneumatic rotary drill is mounted on a portable magnetic drill stand, the cutting efficiency is improved due to the light acid, but on the other hand, there is a drawback that the exhaust noise becomes harsh.

Furthermore, since the air exhaust of an air-rotating drill is generally provided in a downward direction on the front side of the drill, chips and dust on the floor are unnecessarily scattered irregularly.

FIG. 1 is an overall perspective view showing the conventional state of use, in which 1 is the air rotary drill body, 2 is an air pipe,
3 is an air outlet, and 4 is a drill. Reference numeral 6 indicates an OT transportable magnetic drill stand main body, 7 an electromagnetic base plate, 8 a rectifier box body, and 9 a slide support. In this case, a dovetail groove is bored in the slide support 9, and the handle 1 is inserted into the groove.
0 operation, the gear 11 built into the main body is fully rotated, and the slide i (:
12 is configured to move up and down. 13 is slide t'F
12 K *The air rotary drill is attached to the bracket plate 13 in the vertical direction via the fixing bolt 14, and to the socket 1 in the horizontal direction.
The slide rod 12 is attached via the screw 5.

FIGS. 2A and 2B are a front view and a plan view of the entire device improved according to the present invention. In the present invention, the exhaust gas is not discharged from the drill body, that is, the slide rod 12
Socket 1 for attaching the drill body to
5 is formed into a cavity so as to guide the exhaust gas into the socket, and one side is formed into a cylindrical shape with the inside of the slide ff12 facing downward, and the air guided into the socket on the other hand is guided through the through hole in the end face of the socket. The inside of the rod 12 is lowered so that it is led to a silencing chamber 16 provided on the upper part of the electromagnetic base 7, and the air is exhausted from the front side of the base 7. 17
is its outlet.

In the above structure, 18 is a cover that covers the front surface of the slide rod 12, and is used to prevent the air descending inside the support from leaking to the outside, and 19 is a cover that covers the front surface of the slide rod 12. This cover is provided on the lower half of the slider and is intended to cover the front surface of the sliding rod 12 over a certain length while it is descending.

In addition, 20 is a rear discharge port, which is designed to branch the exhaust gas in the sound-deadening chamber and guide it to the rear position of the electromagnet base plate 7.The present invention is constructed as described above, and is an air rotating In addition to muffling the exhaust from the drill body through the muffling/sounding electric device 16 provided on the stand 11111, the exhaust noise during use is reduced by at least 20 to 30%, and the exhaust is made effective. In other words, the electromagnet base plate is indirectly cooled by the adiabatic expanded air that passes through the silencing chamber provided at the top of the electromagnet base plate 7, while the exhaust gas that has passed through the silencer is discharged from the front of the electromagnetic base plate. and/or discharged from the rear discharge port.

In the device of the present invention, the exhaust air from the front discharge port 17 effectively prevents chips generated during drill cutting from wrapping around the stand, and always keeps the air out of the stand. From directing you to blow towards the
This greatly improves work performance and contributes to safe work.

In the above embodiment, the exhaust air from the pneumatic rotary drill body is guided to the sound deadening chamber by forming the mounting socket hollow and forming the inside of the slide eave on the drill stand side into a cylindrical shape. I explained about
It is also possible to use a rubber hose or a combustible pipe to lead directly into the silencing room without making any such structural improvements.

Furthermore, in order to increase the electromagnetic attraction force of conventional drill stands, it is necessary to design the entire electromagnetic base plate to have a large volume. This is to effectively prevent insulation deterioration and burn injuries due to the high temperature of the coil, but if the electromagnet base is raised to the top, it will deteriorate portability.

In particular, in the structure of the present invention, since the electromagnetic base is effectively cooled, the electromagnetic attraction force can be increased with the same volume.

According to experiments conducted by the present inventor, the exhaust noise could be reduced from about 110 horns to about 80 horns.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing a conventional state of use, and FIG. 2 is a diagram showing one device of the present invention, in which A is a front view and B is a plan view. ■...Air rotary drill body 2...Air pipe 3
...Air outlet 4 ...Drill 6
...Portable magnetic drill stand body 7-9/electromagnetic base plate 8...Rectifier box body 9...Slide support column 10. ,． 7~Noddle 12-...Slide rod 8...Bracket plate 15...
Socket 16...Muffling chamber 17...Rear exhaust port Stop...Cover 19...Cover
Wow...Front exhaust port patent applicant Sankyogumi Industries Co., Ltd. Patent attorney Hiroshi Kuma
1. Twist 1,1°! ,/

Claims (3)

[Claims] (1) Consisting of a combination of a pneumatic rotary drill and a portable magnetic drill stand, a silencing chamber is provided in the electromagnetic base-L section of the portable magnetic drill stand, and the exhaust air from the pneumatic rotary drill is guided to the silencing chamber. A portable electromagnetic drilling machine characterized in that the electromagnetic base plate is discharged while indirectly cooling the electromagnetic base plate with air that has been adiabatically expanded and sound-absorbed. (2) A portable electromagnetic drilling machine according to claim 1, characterized in that an outlet for the exhaust gas that has passed through the silencing chamber is provided at the front position on the drill side of the electromagnetic base plate and/or at the rear rear position opposite thereto. . (3) It consists of a combination of an air rotary drill and a portable magnetic drill stand, and the slide rod on which the air rotary drill of the portable magnetic drill stand is attached and allows it to move up and down in the vertical direction has a cylindrical interior. At the same time, a silencing chamber is provided in the upper part of the electromagnetic pedestal, and a discharge port for the exhaust gas that has passed through the silencing chamber is located at the front and/or rear of the electromagnetic pedestal.
(The socket for connecting the pneumatic rotary drill body and the slide rod is formed hollow inside, and the exhaust air from the pneumatic rotary drill is guided to the sound deadening chamber through the socket and the slide rod.) , a portable electromagnetic drilling machine characterized by being discharged from the front and rear positions of the electromagnetic bed plate.