JPH0417332Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a tool for removing keys.

(Technical Background) Gears, pulleys, sprockets, etc. fitted to a shaft are generally fixed by driving a key into a key groove that has been dug.

Further, a slitter 15 as shown in FIG. 5 is used to cut a raw material such as paper or cloth into tape shapes. To attach the paper tube 25 for winding up the original fabric 14 and the cut tape 16 to the slitter 15, as shown in FIGS. A shaft 24 in which a tubular body provided with a keyway 21 is fixed around a central axis 23 via a block 22 is connected to the central paper tube of the original fabric 14;
Alternatively, the key 10 is passed through the paper tube 25 and pushed into the keyway 21, and the two-split tubular body 19, that is, the shaft 24, is expanded in diameter and fitted around the hinge 20.

When the cutting is completed, the tape 16 is wrapped around the paper tube 25, and the shaft 24 is tightened by the winding pressure, so that the key 10 that has been pushed in cannot be easily removed, and is removed by hitting it with a hammer or the like. This extraction method is the same as the gears, pulleys, etc. mentioned above, and is extremely inefficient, and when it is repeatedly performed, such as when removing the key from a slitter, there are problems such as the head 11 of the key being damaged and having to be replaced with a new key 10.

(Purpose of the invention) In view of the above points, an object of the present invention is to provide a tool that can extremely easily remove a key with a small force without hitting the head of the key.

(Means for Achieving the Object of the Invention) In order to achieve the above object, the present invention has a long hole cut in the axial direction on both sides, a plurality of notches carved at appropriate intervals on the bottom surface of the long hole, and a plurality of notches cut into the top of the long hole. A base body having an elongated hole in the axial direction, a lever whose lower end is inserted into the elongated hole provided at the top of the base body and a hole for receiving a pin in the lower end portion, and a lever that is fitted into the pin receiving hole of the lever and both ends thereof. The key is comprised of a pin that engages with the notch, and a rod that is connected to the lever and has a tab at its tip for hooking the head of the key.

(Function) By configuring the present invention as described above, the end face of the base body on the side with the claw is brought into contact with the part where the key is to be removed, the pin at the lower end of the lever is engaged with the frontmost notch, and the claw is inserted into the key. When the lever is pulled using the pin as a fulcrum, the rod connected to the lever is pulled and the key is removed along with it.

At this time, if the key is long, the key can be easily removed by sequentially replacing the pins that engage the notches with the rear notches and repeating the above operation.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

A long hole 3 with notches 2 at appropriate intervals is cut on the lower surface of the tubular body in the axial direction on both sides, and a pin 5 is fitted into the base body 1 with a long hole 4 provided in the axial direction at the top of the tubular body. Insert the lower end of the lever 7 provided with a pin hole 6 into the base body 1 through the elongated hole 4, fit the pin 5 whose both ends engage the notch 2 into the pin hole 6,
A rod 13 having a tab 12 at its tip for hooking the head 11 of a key 10 is fitted and fixed into a socket 9 connected to the lever 7 with a pin 8.

The above embodiment is for removing keys from a slitter, and for gears, pulleys, or sprockets, the elongated hole 4 extends to the left end of the base body 1 as shown in FIG. This is to prevent the key being removed from hitting the edge of the base 1.

Further, although the above embodiment employs a circular tube as the base body, it is not limited to the circular tube, but a square tube or a shaped steel may be used in combination.

Furthermore, a socket 9 is installed at the connection part between the lever 7 and the rod 13.
However, it goes without saying that other connection means can be used as appropriate.

(Effects) As explained above, according to the present invention, the key can be easily pulled out with a small force, and since the head of the key is not hit, the head of the key is not damaged.

[Brief explanation of the drawing]

1 and 2 are perspective views of a key extraction tool according to an embodiment of the present invention, FIG. 3 is a front view of the same, FIG. 4 is a plan view of the same, and FIG. 6
The figure is an enlarged perspective view of the main part of the shaft for a slitter, and FIG. 7 is a side view of the same, and the main symbols in the figure are as follows. 1... Base body, 2... Notch, 3... Long hole, 4...
...Long hole, 5...Pin, 6...Pin hole, 7...Lever, 8...Pin, 9...Socket, 10...Key, 11...Key head, 12...Law, 13...
... Rod, 14 ... Original fabric, 15 ... Slitter, 16
...Tape, 17,17...Shaft, 18,1
8', 18''...Intermediate roller, 19...Half-split tubular body, 20...Hinge, 21...Keyway, 22...Block, 23...Center shaft, 24...Shaft, 2
5...Paper tube.

Claims (1)

[Scope of utility model registration request] A base body with a long hole cut in the axial direction on both sides, a plurality of notches carved at appropriate intervals on the bottom surface of the long hole, and a long hole in the axial direction at the top, and a bottom end formed in the long hole formed in the top of the base body. a lever into which is inserted a hole for receiving the pin at its lower end; a pin that is fitted into the hole for receiving the pin of the lever and has both ends engaged with the notch;
A key extraction tool characterized by comprising a rod connected to the lever and having a claw at the tip for hooking the head of the key.