JPH0135811Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Field of Industrial Application The present invention relates to a key attachment device for attaching a key to a key groove formed on the outer peripheral surface of a shaft portion of a workpiece.

(2) Conventional technology Conventionally, when attaching a key to the keyway, the key was held in the hand and struck with a tool such as a hammer, but such work required skill and was particularly difficult when the key was small. The problem is that the work is difficult and inefficient.

In order to solve this problem, for example,
− As described in Publication No. 71037, a machine frame; a clamp device that clamps the workpiece at a predetermined position on the machine frame; a supply device for the key to be installed in the keyway of the workpiece; and a key receiving device from the supply device. 2. Description of the Related Art There is known a key mounting device that mechanizes key mounting work by using a key mounting device that includes a key press-fitting device that press-fits into a key groove of a workpiece;

(3) Problems to be solved by the invention In the conventional key mounting device, the key press-fitting device includes a key receiving mechanism that receives the key from the supply device and transports it to the keyway entrance of the workpiece, and a key receiving mechanism that transports the key to the keyway entrance. A key press-fitting mechanism that presses the key into the correct position in the keyway requires a drive means to drive each of these mechanisms individually, as well as a control device to operate these mechanisms in sequence. However, the structure as a whole becomes complicated, the cost increases, and the working process time becomes longer.

It is an object of the present invention to provide a key mounting device with a simple structure that can automate key mounting while solving such problems.

B. Structure of the invention (1) Means for solving the problems In order to achieve the above object, the invention has a machine frame and;
a clamping device for clamping a workpiece having a keyway formed on the outer circumferential surface of the shaft part at a predetermined position on the machine frame; a supplying device for a key to be attached to the keyway; receiving the key from the supplying device and keying the workpiece; a key press-fitting device that press-fits the key into the groove; the key press-fitting device includes a key press-fitting member that can magnetically attract the key; and a key that attracts the key from the key supplying section of the supplying device; It is characterized by comprising a drive mechanism that reciprocates between a receiving position and a key press-fitting position where the attracted key is press-fitted into the keyway of the workpiece.

(2) Effects According to the above configuration, the key press-fitting member automatically attracts the key from the key supply section when it moves to the key receiving position, and simply moves from the key receiving position to the key press-fitting position. The key can be automatically press-fitted into the keyway of the workpiece. Even if the key press-fitting member leaves the key press-fitting position, the key remains in the fixed position in the keyway due to friction with the keyway.

(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention is comprised of a supply device S for the key 2 to be mounted in the keyway 4a, and a key press-fitting device P that receives the key 2 from the supply device S and press-fits the key 2 into the keyway 4a.

In this embodiment, the workpiece W is the crank web 3
A crank pin hole 3a is bored at one end of the crank web 3, and a key groove having an arcuate longitudinal section is formed on the outer peripheral surface of the small diameter end of the journal 4. 4
a is formed.

Next, to specifically explain the structure of the clamping device C for the workpiece W, the crank web 3 of the workpiece W is placed on the flat workpiece support surface 5 provided at the top of the machine frame 1. A journal 4 of a workpiece W is fitted into the fixed cylindrical holder 6, and a crank pin hole 3a of the workpiece W is fitted into a positioning pin 7 erected on the workpiece support surface 5. A center pin 8 is fixedly installed at the bottom of the machine frame 1 to support the lower end of the journal 4 of the workpiece W. On the other hand, a center pin 8 is fixedly installed at the top of the machine frame 1 to engage with the upper surface of the crank web 3 of the workpiece W. A clamper 9 that restricts movement is pivotably supported 10. The clamper 9 is connected via an interlocking mechanism (not shown) to an operating lever 12 that is supported pivotably on the machine frame 1, and the lever 12 is rotated approximately 90 degrees counterclockwise from the solid line position to the chain line position in Figure 1. When operated, the workpiece W can be released by rotating the clamper 9 in the same counterclockwise direction.

On one side of the workpiece W, a fan-shaped plate-shaped key press-fitting member 13 is rotatably supported by the machine frame 1 around a support shaft 13a perpendicular to the workpiece W axis. This key press-fitting member 13 is entirely composed of a permanent magnet, and a notch-shaped key holding portion 13b that opens on the inner surface (right side in FIG. 3) is recessed on one end surface in the rotation direction. , this key holding part 13
b, the substantially half-moon-shaped key 2 attached to the key groove 4a of the workpiece W can be attracted by magnetic force. The key press-fitting member 13 has the support shaft 13a.
The arm 13c is integrally connected via the
This arm 13c is pivotally connected 17 to a piston rod 16 of an air cylinder 15 serving as a drive mechanism, the base of which is pivotally supported 14 on the machine frame 1. Therefore, the key press-fitting member 13 can be rotated between the key receiving position shown in FIG. 1 and the key press-fitting position shown in FIG. Part 13b is the workpiece W
The key holding portion 13 is located opposite to and adjacent to the key groove 4a of
The key 2 that has been attracted by b can be correctly press-fitted into the keyway 4a. The key press-fitting device P of the present invention is constituted by the key press-fitting member 13 and the air cylinder 15 as a drive mechanism.

A supply device S for the keys 2 is arranged inside the key press-fitting member 13 (on the right side in FIG. 3). The support shaft 1 is slidably accommodated in the
3a, and a spring (not shown) that urges the keys 2 in the guide wall 18 toward the key press-fitting member 13.
The end opening of the key press-fitting member 13, that is, the supply port 18a, faces the inner surface of the key press-fitting member 13 (right side in FIG. 3) with a gap s in the normal state.
3 is adapted to face the key holding portion 13b when it reaches the key receiving position (see FIG. 1). Therefore, at the key receiving position, the outermost one of the keys 2 waiting in the guide wall 18 can be directly attracted to the key holding portion 13b.

Next, the operation of the above embodiment will be explained. When attaching the key 2, the clamper 9 is first held in the release position shown by the chain line in FIG. The journal 4 of the workpiece W is inserted into the holder 6 while the pin hole 3a is adapted to the positioning pin 7, and the lower end of the journal 4 is brought into contact with the center pin 8.
Thereafter, by operating the operating lever 12, the clamper 9 is rotated to the clamping position shown by the solid line in FIG. 1, and the clamping of the workpiece W is completed.

At this point, the air cylinder 15 is still in the contracted state, and the key press-fitting member 13 is moved to the key receiving position (first position).
(see figure), and its key holding part 13
At b, the key 2 attracted from the supply port 18a of the guide wall 18 is held by magnetic force.

Then, when the air cylinder 15 is operated to extend,
In conjunction with this, the key press-fitting member 13 rotates counterclockwise around the support shaft 13a to the key press-fitting position shown in FIG. Keyway 4a of workpiece W
is press-fitted correctly. After that, air cylinder 1
5 is retracted again, the key press-fitting member 13 rotates clockwise around the support shaft 13a, but at this time, the frictional contact force of the key groove 4a with respect to the key 2 is stronger than the key holding portion 13b with respect to the key 2. The key press-fitting member 13 is larger than the magnetic attraction force of the key 2.
Move away from the workpiece W while leaving it in the keyway 4a.

By the way, while the key press-fitting member 13 is rotating, its inner surface (right side in FIG. 3) faces the supply port 18a of the guide wall 18 of the supply device S from beginning to end with a gap s therebetween. Among the keys 2 waiting inside, the outermost one is attracted by the magnetic force of the key press-fitting member 13, but is prevented from falling out from the sample supply port 18a by slidingly contacting the inner surface thereof. Then, when the key press-fitting member 13 returns to the key receiving position shown in FIG.
is attracted to the key holding portion 18b from the supply port 18a. As a result of this suction, the remaining keys 2 in the guide wall 18 entirely slide toward the supply port 18a based on the biasing force of a spring (not shown).

Since the process of attaching the key to the keyway 4a of the workpiece W is thus completed, the processed workpiece W is replaced with an unprocessed one, and the same operation is repeated thereafter.

In the above embodiment, the entire key press-fitting member 13 is made of a permanent magnet, but only the key holding part 13b may be made of a permanent magnet or an electromagnet.

C. Effects of the invention As described above, according to the invention, by simply reciprocating the key press-fitting member between the key receiving position and the key press-fitting position, it is possible to automatically receive the key from the supply device and store the key. The key can be automatically press-fitted into the key groove of the workpiece, and therefore the key can be mounted very efficiently and accurately. Moreover, the key press-fitting member is used both as a key receiving means for receiving the key from the supply device and transporting it to the workpiece, and as a key press-fitting means for correctly press-fitting the key into the keyway of the workpiece, so the structure of the key press-fitting device is simple. This can contribute to cost reduction.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view showing the main parts of the key mounting device, and FIG. 2 is a front view similar to FIG. 1 showing the key press-fitting operation state of the key mounting device. 3 is a side view of the key press-fitting device and the supply device as seen along the line of FIG. 1, and FIG. 4 is a perspective view of the key press-fitting member. C...clamp device, S...supply device, P...
Key press-fitting device, W...work, 1...machine frame, 2...
...Key, 4a...Key groove, 15...Air cylinder as a drive mechanism, 18a... Supply port as a key supply unit.

Claims (1)

[Scope of utility model registration request] a machine frame; a clamping device for clamping a workpiece having a keyway formed on the outer circumferential surface of the shaft portion at a predetermined position of the machine frame; a supplying device for a key to be installed in the keyway; receiving the key from the supplying device; a key press-fitting device that press-fits the key into the key groove of the work; the key press-fitting device includes a key press-fitting member capable of magnetically attracting the key; and a key press-fitting member that receives the key from the key supplying section of the supplying device. A key mounting device comprising a drive mechanism that reciprocates between a key receiving position where the key is sucked and a key press fit position where the sucked key is press fit into the key groove of the workpiece.