JPS622603Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a slide feeding device with a safety device.

Conventional slide feeding devices did not have a safety device, so if the slide gets stuck during slide feeding, unreasonable force from the drive source is applied to the internal mechanism of the feeding device. There was a risk of damage and accidents occurring.

In view of the above-mentioned problems, this invention automatically disconnects the drive source side from the internal mechanism of the feeding device when the slide gets stuck during slide feeding, resulting in damage and other accidents. The present invention aims to provide a slide feeding device with a safety device that prevents this from occurring.This will be explained below based on an embodiment shown in the drawings. 1 is a substrate having an upright portion 1a; It is arranged so as to be slidable in the vertical direction in FIG.
4 is an electromagnetic plunger which is fixed on the substrate 1 and whose actuator 4a is fixed to the sliding plate 2, and which moves the sliding plate 2 upward in FIG. 1 when excited. , 5 and 6 are bearing bodies pivotally attached to the upright portion 1a of the substrate 1 and the upright portion 2a of the sliding plate 2, respectively, in a plane parallel to the substrate 1, and 7 is the bearing body 5 and 6, respectively. a drive shaft which is pivotally supported and has a pulley 8 integrally formed on its externally protruding end; a belt 9 which connects the pulley 8 and a motor (not shown) to constantly rotate the pulley 8 in the clockwise direction in FIG. 2; 10 is an E-ring fitted on the left side of the drive shaft 7 in FIG. 1 to prevent the drive shaft 7 from coming off to the left in FIG. 1, and 11 is on the surface of the right side of the drive shaft 7 in FIG. The implanted pin 12 is mounted on the drive shaft 7 so as to be slidable in the axial direction, has left-handed helical teeth, and is slidably engaged with the pin 11 at its right end, allowing the pin 11 to be pushed. A worm 13 is provided with a groove 12a having a sloped surface on the side where pressure is applied, and is interposed between the E-ring 10 and the worm 12, giving the worm 12 the habit of moving in the right direction in Figure 1. The coil spring 14 is disposed on the substrate 1 so as to be slidable in the left-right direction in FIG. 16 is a rotating shaft pivotally supported on the base plate 1; 17 is a worm wheel fixed to the rotating shaft 16 and integrally formed with a crank plate 18 having a cam groove 18a on the lower surface at the top thereof; ,
The pin 19 has one end pivotally mounted on the base plate 1, and has a pin 20 implanted in the upper surface of the center portion that slides into the cam groove 18a of the crank plate 18, and engages with the upright portion 14a of the lock plate 14 on the lower surface of the tip. A cam lever 22 is implanted with a pin 21 that restricts the movement of the lock plate 14 to the right in FIG. (See Figures 3 and 5).

Since the slide feeding device according to the present invention is constructed as described above, if the electromagnetic plunger 4 is first excited in the state shown in FIG. 1 (FIG. 5), the sliding plate 2 will resist the spring 3. 1, and the drive shaft 7 is rotated to the left about the bearing body 5, so that the worm 12 meshes with the worm wheel 17 as shown in FIG. It begins to be rotated to the left. Then, the crank plate 18 also begins to rotate to the left in FIG. 1, so the cam lever 19 is rotated to the left by the cooperative action of the cam groove 18a and the pin 20, and the pin 21 moves to the right. As a result, the lock plate 14 is released from the restriction by the pin 21 and is moved to the right in FIG. 1 by the spring 15, and its right end portion enters below the sliding plate 2 as shown in FIG. Therefore, even if the electromagnetic plunger 4 is returned to the de-energized state at this stage, the right end of the lock plate 14 prevents the slide plate 2 from moving downward, so that the engagement between the worm 12 and the worm wheel 17 is maintained. . Next, when the crank plate 18 rotates one turn and returns to the state shown in FIG. 1 (FIG. 5), the cam lever 19 is rotated to the right by the cooperative action of the cam groove 18a and the pin 20, and the pin 21 is rotated to the left. move towards As a result, the lock plate 14 is pushed to the left by the pin 21 against the spring 15, so that its right end portion is removed from the lower end portion of the sliding plate 2. Therefore, since the sliding plate 2 is moved downward in FIG. 1 by the spring 3, the drive shaft 7 is rotated to the right, and as a result, the worm 11
is removed from the worm wheel 17, so the crank plate 18 stops rotating. Thus, each time the electromagnetic plunger 4 is momentarily excited, the crank plate 18 rotates once, and as shown in FIGS. 5 and 6, the rotation of the crank plate 18 causes the main drive plate 23 for slide insertion and removal to reciprocate. , slide feeding is performed intermittently.

Now, if the slide gets stuck during slide feeding, the crank plate 18 and the worm wheel 1
7 is forcibly stopped. However, since the drive shaft 7 continues to rotate, the pin 11 causes the worm 12 to also continue to rotate in the clockwise rotation direction in FIG. In this case, since the teeth of the worm 12 are formed to have a left-handed twist, the worm 12 moves to the left in FIG. 4 against the coil spring 13 as it rotates in the right-handed rotation direction in FIG. In addition, since the surface of the groove 12a of the worm 12 that is slidingly engaged with the pin 11 on the side on which the pressing force of the pin 11 is applied is a slope, a component of the pressing force moves the worm 12 to the left in FIG. It acts as a moving force, and as a result, the worm 12 can move smoothly to the left. When the worm 12 moves to the left, its left end face pushes the lock plate 14 to the left against the spring 15, and the right end of the lock plate 14 comes off the lower end of the sliding plate 2. Therefore, since the sliding plate 2 is moved downward in FIG. 4 by the spring 3, the drive shaft 7 is turned to the right, and the worm 12 is separated from the worm wheel 17. As soon as the worm 12 comes off the worm wheel 17, it is pushed back to the right by the spring 13, so that the lock plate 1
4 is in a state where it can move to the right. In this way, the drive source side is automatically separated from the internal mechanism of the present device, so that no unreasonable force is applied from the drive source side to the internal mechanism, and accidents such as damage are prevented from occurring. Next, after removing the cause of the slide jamming, the electromagnetic plunger 4 is energized again, and the worm 12 is moved to the worm wheel 1 in the same manner as above.
7, but at this time the crank plate 18
Even if the lock plate 14 has stopped in the middle of rotation, the lock plate 14 is not restricted by the pin 21 of the cam lever 19, so it is moved to the right by the spring 15, and its right end becomes as shown in FIG. It enters below the sliding plate 2. Therefore, even when the electromagnetic plunger 4 is returned to the non-excited state, the same engagement between the worm 12 and the worm wheel 17 as described above is maintained, and the slide is fed.

As described above, according to the slide feeding device according to the present invention, even if the slide gets stuck during slide feeding, it is possible to reliably prevent damage and the like from occurring.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of a slide feeding device with a safety device according to the present invention, FIG. 2 is a left side view of the above embodiment, FIG. 3 is a plan view of the above embodiment, and FIG.
The figure is a front view showing a state in which the worm and the worm wheel are engaged in the above embodiment, and FIGS. 5 and 6 are schematic diagrams showing the reciprocating movement of the main drive plate for slide insertion and removal in the above embodiment. 1... Board, 2... Sliding plate, 3... Spring, 4... Electromagnetic plunger, 5, 6... Bearing body,
7... Drive shaft, 8... Pulley, 9... Belt,
10... E ring, 11... Pin, 12... Worm, 13... Coil spring, 14... Lock plate, 15... Spring, 16... Rotating shaft, 1
7... Worm wheel, 18... Crank plate,
19...Cam lever, 20, 21...Pin, 22
...Active plate for slide insertion and removal.

Claims (1)

[Scope of utility model registration request] In a slide feeding device equipped with a crank plate for reciprocating a driving plate for inserting and removing a slide,
A worm wheel integrated with the crank plate, a drive shaft whose one end is swingably supported by a fixed plate, and a worm wheel mounted on the drive shaft so as to be slidable in the axial direction and moved in one direction by a spring. A worm is provided with sliding properties and is rotated integrally with the drive shaft, and the other end of the drive shaft is pivotally supported and a spring provides return behavior when the worm is moved against the spring. a moving plate that causes the drive shaft to swing and engages the worm with the worm wheel; and a moving plate that engages with the moving plate to prevent the moving plate from returning and allows the worm to move in the other direction against a spring. and a lock plate that is pushed by an end face of the worm and separated from the movable plate when the worm is moved, so that the worm wheel stops and the worm rotates in the twisting direction of the teeth of the worm. A slide feeding device with a safety device, characterized in that the worm is set in a direction in which the worm can move in the other direction when the feeding continues.