JPS6312734B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting device that can be used for automatically mounting an operating knob of a variable resistor onto an operating shaft. The object is to provide a device that can be guided and installed smoothly and accurately.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to drawings showing one embodiment thereof. This embodiment is a device in which an operating knob (hereinafter simply referred to as a knob) is attached to an operating shaft (hereinafter simply referred to as a shaft) of a sliding variable resistor.

In the figure, 1 is the shaft of the variable resistor, and 2 is the knob. 3 is a shaft driven in the vertical direction by an air cylinder 4; 5 is a holder attached to its tip that can be freely moved up and down;
holds the knob 2 in a recess 6 provided at the upper end. Reference numeral 7 designates a pair of guide arms that can freely extend and retract above the knob 2 held by the holder 5. A pair of guide arms 7 are provided facing each other on both sides of the holder 5. It has a tapered guide portion 9 for guiding the shaft into the shaft insertion hole 8. This guide arm 7 is
It is rotatably attached by a pin 11 to a movable base 10 that is slidably disposed around the shaft 3 so as to be able to move up and down relative to the shaft 3, and is rotatably mounted by a spring 12. A roller 13 that is biased in the projecting direction and attached to the guide arm 7 is in contact with the slope of a fixed cam 14 formed on the side surface of the holder 5, and the movable base 10 is moved relative to the holder 5. When the guide arm 7 is raised, the tip of the guide arm 7 projects above the knob 2, and when it is lowered, it retreats. 15 is a stopper arm that comes into contact with the stopper frame 16 when the movable base 10 moves upward to a predetermined position to stop the movable base 10 from rising further;
It is fixed to a movable base 10. The stopping position is adjusted with a screw 17. Furthermore, a cam 18 is rotatably attached to the holder 5 by a pin 19 and biased by a spring 20, and is movable when the movable base 10 is lowered relative to the holder 5 by a predetermined amount or more. The guide arm 7 is engaged with the locking portion 21 of the base 10 to maintain their relative positions, and the guide arm 7 is maintained in a retreated state from above the holder 5 to the side. 22 rotates the cam 18 by contacting the protrusion 23 of the stopper frame 16 when the holder 5 and the movable base 10 are raised to a predetermined position when the holder 5 and movable base 10 are raised by the shaft 3;
This is a lever that releases the engagement with the locking portion 21, relatively raises the movable base 10, and causes the guide arm 7 to protrude. A spring 24 biases the movable base 10 in the upward direction.

Next, the mounting operation with this configuration will be explained with reference to FIGS. 3 and 4.

First, in the initial state, as shown in A, the shaft 3 has descended to the lowest end, and the movable base 10 has also moved downward relative to the holder 5, and the cam 18 engages the locking portion 21. is engaged with.
Therefore, the roller 13 of the guide arm 7 comes into contact with the lower end of the fixed cam 14, and the tip of the guide arm 7 is in a state of retreating from above the holder 5 to the side. In this state, the knob 2 is sent to the recess 6 of the holder 5 by a conveying means (not shown).
is fitted and held.

Next, in this state, the shaft 3 is raised upward by the air cylinder 4 as shown in B. When the lever 22 rises to a predetermined position, the lever 22
The tip of the cam 18 contacts the protrusion 23 of the stopper frame 16 and rotates in the direction of the arrow, thereby causing the cam 18 to also rotate in the direction of the arrow and disengage from the locking portion 21. .

Then, as shown in C, the movable base 10 rises relative to the holder 5 as shown by the arrow due to the biasing force of the spring 24, and the roller 13 of the guide arm 7 moves along the slope of the fixed cam 14. As the guide arm 7 rises, the tip end of the guide arm 7 projects above the holder 5, that is, above the knob 2. This prevents the knob 2 from popping out. In this state, the shaft 3 is further raised. Then, the guide part 9 of the guide arm 7 fits with the tip of the shaft 1 of the variable resistor as shown by the dashed line, and even if the position of the shaft 1 is slightly deviated, the tapered shape of the guide part 9 keeps the shaft 1 in a predetermined position. Guide it into position so that it can be smoothly fitted into the shaft insertion hole 8 of the knob 2 as shown in C'.

Furthermore, as shaft 3 is raised,
When the knob 2 is sufficiently fitted to the shaft 1 and at the same time is raised to a predetermined position, the stopper arm 15 of the movable base 10 moves to the stop frame 1 as shown in D.
6, the movable base 10 cannot be raised any further, and only the holder 5 is further raised by the shaft 3. As a result, the knob 2 is completely fitted onto the shaft 1. At the same time, since the movable base 10 stopped midway at this time, the position of the movable base 10 was lowered relative to the holder 5, and the roller 13 of the guide arm 7 moved along the slope of the fixed cam 14. The tip of the guide arm 7 then retreats from above the holder 5 to the side. When the holder 5 has finished rising completely, the cam 18 is moved by the biasing force of the spring 20.
engages with the locking portion 21 again and holds the guide arm 7 in a retracted state.

With the above steps, the work of attaching the knob 2 to the shaft 1 is completed, and the shaft 3 is lowered by the air cylinder 4. Then, since the guide arm 7 is retracted at this time, the knob 2 is attached to the shaft 1, taken out from the holder 5, and sent to the next process together with the variable resistor. Further, as the shaft 3 descends, the holder 5 and the movable base 10 also descend, and at this time, even if the lever 23 comes into contact with the protrusion 23, the engagement of the cam 18 is not released, so the guide arm 7 is moved back. As it is,
Return to the original state of A.

By repeating the above operations, the knob 2 can be automatically attached to the shaft 1, and the shaft 1 can be guided to be correctly aligned with the shaft insertion hole 8 of the knob 2, thereby smoothly can be installed accurately.

In addition, in the above embodiment, a case has been described in which an operating knob is attached to an operating shaft of a variable resistor, but the present invention is also applicable to a component that is to be attached to a shaft and has a shaft insertion hole. Needless to say, this method can be widely applied to automatically attaching objects to shafts.

As described above, according to the present invention, it is possible to obtain a useful device that can automatically, smoothly and accurately mount components around a shaft.
That is, the present invention uses plate cams to open the guide arms that are rotatably provided and contact each other to form shaft insertion guides to the left and right, and furthermore, the relative position of the plate cams with respect to the guide arms is controlled by the stopper. This feature is characterized in that the guide arm is changed from an open state to a closed state to an open state in one operation by using a spring to change the state. For example, when inserting a slide resistance knob, just before insertion, the guide arm is changed from an open state to a closed state to form a tapered guide that guides the insertion shaft, and when inserted, the guide arm is kept in the closed state and oriented in the correct direction. The guide can be regulated so that the guide is inserted in the right direction, and when the insertion is progressing, the guide can be opened again so that it does not get in the way during the final insertion.
Furthermore, by maintaining the guide in its final state in an open state, it is possible to supply the inserted components without being obstructed by the guide.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a mounting device according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIGS. 3 and 4.
The figures are a front view and a main part sectional front view for explaining the operation. 1...Shaft, 2...Knob, 3...Shaft, 4
... Air cylinder, 5 ... Holder, 6 ... Recess, 7 ... Guide arm, 8 ... Shaft insertion hole, 9 ...
... Guide part, 10 ... Movable base, 11 ... Pin, 12 ... Spring, 13 ... Roller, 14
... Fixed cam, 15 ... Stopper arm, 16 ...
...stopper frame, 17...screw, 18...cam, 1
9...Pin, 20...Spring, 21...Locking portion, 22...Lever, 23...Protrusion piece, 24...Spring.

Claims (1)

[Claims] 1. A holder that holds a component to be mounted on a shaft and has a shaft insertion hole on the top surface at the upper end and is movable up and down, and a holder that is biased from below in the direction of abutting against the holder. It is formed on a freely movable base and can be opened and closed above the component held in the holder, and has a tapered guide portion for guiding the shaft into the shaft insertion hole of the component when it is biased in the closing direction and is fully closed. a fixed cam formed on the side surface of the holder that opens and closes the guide arm by changing its relative position with the guide arm; and a fixed cam that maintains the open state when the guide arm is opened. The cam is equipped with a cam and a lever that releases the cam only by force in a certain direction, and when the holder is raised, the cam is first released by a stopper frame installed separately from the holder and the lever. to close the guide arm, and then bring the movable base into contact with the stopper frame at the further raised position to change the relative position with the fixed cam to open the guide arm, and the cam closes the guide arm. A mounting device characterized in that the guide arm is opened and closed in one movement of the holder by holding the guide arm in an open state.