JPH0377055B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Automatic button processing machines for processing both sides of buttons are already well known. Such processing is usually carried out using a turret equipped with pliers that grip the button. In general, such a turret moves the pliers one after the other through a certain arc length to move the pliers to several work stations, such as a button gripping station, a processing station where buttons are successively machined with respective tools,
They bring it to a station where they take out the buttons.

As mentioned above, since these operations must be performed on both sides of the button, the use of two rotating turrets with pliers has been proposed for many years. The button to be processed is first received in the first of these turrets, clamped in the pliers of this turret, and transported to a work station location.
Here, processing operations are carried out on one side of the button, and then this turret transports the semi-finished button to the vicinity of a second turret. The semi-finished button is then stored in a second turret, which processes the unfinished surface of the button, and finally discharges it. button first
To transfer a button from one turret to a second, the pliers of the first turret usually hold the button and move it from a position where one side of the button is processed to a position where it is received in the second turret. be. In this position, called the transfer position, the movement of the button from the first pliers to the second pliers means that the semi-finished product button is transferred from the first pliers to the second pliers.
This is done by means of a discharging device which substantially pushes the liquid to the prior.
Regardless of the speed at which the button moves during this transition, in prior art devices there is a period during which the button is not held.

For this reason, this method actually caused serious inconveniences, such as the button falling off or not being properly received by the priors of the second turret. Although there have been proposals to partially improve these shortcomings, apart from complicating the mechanism, these proposals have not sufficiently solved all of the above-mentioned shortcomings.

The purpose of the invention is to maintain the button at all times during its transfer from the pliers of the first turret to the pliers of the second turret, so that the button does not fall off or is gripped incorrectly by the second pliers. The purpose of the present invention is to provide a button gripping and transporting device that prevents the user from doing so.

Another object of the present invention is to substantially eliminate button processing defects caused by the step of transferring buttons from a first turret to a second turret, thereby significantly improving production efficiency of double-sided processed buttons. It is in.

That is, the present invention includes first and second movable turrets having first and second gripping flyers, respectively, and moving the turrets to a location where the first and second flyers substantially face each other. A button gripping and transporting device for a button processing machine, comprising a moving device and a device for controlling the opening and closing of the pliers at this location, wherein first and second buttons mounted on the first and second turrets, respectively, and a device for transferring the button between the first and second turrets from the first plier to the second plier. This is in the button gripping and transporting device of the button processing machine.

The present invention will now be described in detail with reference to preferred embodiments thereof, which are illustrated in the accompanying drawings.

Reference numerals 1 and 2 indicate first and second turrets, respectively. This forms part of a button operation device (not shown). Such turrets 1 and 2 are rotatable about respective parallel axes A1 and A2. In the illustrated embodiment, these two turrets are rotated 90 degrees each and
Can be stopped in two different positions. That is, these four positions are separated by 90 degrees from adjacent positions. Two of these locations are shown in FIG. 1, one of which is shown in particular detail. In this position, the so-called button gripping pliers facing each other at a short distance, a transfer of the button from the first turret to the second turret takes place.

The gripping and transporting unit for the turret 1 shown in FIG. 1 will now be described in detail. The structure 4 for the turret 1 is rotatable, for example via bearings 6, relative to a fixed structure 5, to which a tubular element 7 is attached. The tubular element 7 serves as a guide seat for the sleeve member 8. The sleeve member 8 is movable in the direction in which the tubular element 7 is oriented, ie from left to right in FIG. 1 or vice versa. At the outer end of this turret 1, the sliding sleeve member 8 has a conical surface 9.

The gripping pliers are arranged inside the sleeve member 8. The gripping pliers member includes a series of laminated pliers 11 in the shape of follower petals. These laminated pliers are attached at the rear part 12 to the structure of the fixing element or support 7.

These priors 11 of substantially known type
has a substantially frustoconical outer surface 10 that mates with a corresponding frustoconical surface 9 of the sleeve element 8 .
Due to the elasticity of the pliers 11, when the sleeve member 8 moves backward (moves to the right in Figure 1), the pliers 11 made of a laminate expands slightly (as shown in Figure 3), while the sleeve member 8 moves outward. When moved into its forward or advanced position (to the left in Figure 1), the laminated pliers 11 move in a direction closer to the axis of the sleeve member 8, clamping the button B in the meantime.

The lever member 13 determines whether the sleeve member 8 is slid from side to side to open or close the pliers. This lever member 13 is pivotally connected to the structure of the turret at 14 and has a shaped end 15 which engages in a slot 16 suitably formed in the outer surface of the sleeve member 8. are doing. The lever member 13 has a pin extension 17 at its top, to which a bearing 18 is attached, which bearing 18 is attached to a radial cam surface 19.
It comes into contact with and slides. Cam 19 is hollow shaft 2
0, the shaft 20 is keyed at its lower end to a sleeve 21. A tappet lever 22 is attached to the sleeve 21,
A roller-type cam 23 that slides on a cam surface is provided at one end of the tappet lever 22. The cam surface is carried by a rotating shaft 24.

Via the cam 23 and the lever 22, the tubular shaft 2 is vibrated angularly in an alternating manner. Due to this alternate vibration, the lever member 13 vibrates around the pin 14 according to the shape of the cam surface 19, and moves the sleeve 8 alternately back and forth. This is an operation according to the sequence described later. In this way, prior 1
One opening/closing movement is provided by the cam 23.

The bottom of the tubular element 7 and the shoulder 26 of the sleeve member 8
A spring 25 interposed between the pliers 11 maintains the pliers 11 in the closed position, while ensuring that the opening movement effected in the manner described above due to the vibration of the lever member 13 occurs overcoming the elastic action of the spring 25. be.

In the area between the stacked pliers 11 is located one of the button transfer members that moves from the first turret to the second turret. Such a member, generally indicated at 27, includes an externally flattened head 28 and a hollow tubular tail 29 having an integral crosspiece 30. A tapepet stem 31 projects from this hollow tubular tail portion 29 toward the turret axis. The interior space of the hollow tubular tail, which is a tubular region, is occupied by a bottomed tubular element 32 . This tubular element 32 is threaded as indicated at 33 into the rear end of the laminating pliers.
A spring 35 is interposed between the front bottom of the tubular element 32 and the crosspiece 30. Additionally, a slot 36 is provided in the surface of the tubular element 32 into which the crosspiece 30 is slid.

The rear end of the tapepet stem 31 is connected to the shaft 38.
It engages with the inclined cam surface 37 integral with the. Shaft 3
8 is provided coaxially with and inside the hollow shaft 20. This shaft 38 is pivoted at its lower end at a point 41 and has a roller 42 at its other end.
It is under the control of the end 39 of the balance lever 40, which has a vertical axis, so that it can move in the vertical direction. The roller 42 slides against a cam surface 43 carried by the cam holder shaft 24 . Compression spring 44
maintains shaft 38 in its lowermost position.

The entire device is such that when the shaft 38 is in its lowermost position, the tappet stem 31 is pushed fully to the left as shown in FIG. It is designed so that it can be moved almost to the prior of turret 2. On the contrary, shaft 3
8 is in its top position, the transfer member 27 is fully retracted to the right and button B is in its top position.
It is firmly sandwiched between 1 and held on the head 28.

Although the apparatus including turret 1 has been described in detail, the same is true regarding turret 2. Therefore, with respect to the turret 2, similar members are given the same reference numerals with the suffix a.

However, the spring 44a for turret 2 has a weaker elastic modulus than the corresponding spring 44 for turret 1. Other features of this device and the interaction of its parts will become apparent from the following description of the operating sequence with reference to FIGS. 1-4.

After the button semi-finished product has undergone various processing or processing on its surface B1, it reaches the position shown in FIG. 1 and is initially placed on the turret 1. In this figure, the button is held by the pliers 11 with its face B2, that is, its rear face, in contact with the head 28 of the transfer member 27.

The starting position of the transfer cycle is shown in FIG.

In this position, as shown in the figure, the pliers 11
is closed and holds the button, prior 11a
is open and the transfer member 27 is in the retracted position. Transfer member 27a is in a retracted position determined by ramp 37a, except under the action of spring 35a, which is located slightly inward of each plier.

Now, under the action of the counterclockwise rotating lever 40a, the shaft 38a is lowered under the action of the spring 44a, causing an advancement (to the right) of the tappet 31a and thus of the transfer member 27a. The front surface 28a of the transfer member 27a then comes into contact with the other surface B1 of the button. During this time, Praia 1 on the right
1a is still in the open position.

This state corresponds to FIG.

In this state, the button is tightly sandwiched on both sides between the transfer members 27 and 27a, and the actual transfer action begins now. While shaft 38 is lowered by clockwise rotation of lever 40, shaft 38a begins to move correspondingly by rotation of lever 40a. This rotation of the lever 40a is also a clockwise rotation.
At the same time, the hollow shaft 20 is also rotated by the lever 22 controlled by the cam 23, and due to the rotation of the lever member 13 (rotation in the counterclockwise direction), the aforementioned sleeve member 8 also enters again (to the right), and the pliers 11 are rotated. Allow opening. At this stage the button is no longer held by the pliers, but is firmly sandwiched between the transport members which move together from right to left.

Upon completion of the transfer, the prior 11a (third
) is closed controlled by the rotation of the tubular shaft 20a under the engagement of the lever 22a and the cam 23a. In this way, at this stage, surfaces 28, 28
The transfer of the button held between a is executed and the second
The final position of the turret in the prior is reached with absolute precision and without any defects.

Left hand transfer member 27 due to the presence of spring 35a
The elasticity of a makes it unnecessary to pre-adjust the stroke of these transport members depending on the thickness of the button. In this way, even if the buttons to be handled have different thicknesses, there is no problem in gripping and transporting the buttons.

Figure 4 shows the final stage of the work cycle. That is, the button is still gripped between the pliers 11a, and its surface B1 is aligned with the head 28 of the transfer member 27a.
a, the shaft 38 starts moving again and allows the transfer member 27 to return to the right.

As can be seen from the above description, the structure of the gripping device makes it possible to transfer the button from the first turret to the second turret while holding it at all times, and at any moment during this delicate transfer phase. This is to ensure that it does not fall off or fail to hold securely.

Although the present invention has been described above in detail with reference to the preferred embodiment illustrated in the accompanying drawings, the present invention is not limited to this specific embodiment and can be modified in many ways without departing from the spirit of the invention. Of course.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a preferred embodiment of the present invention;
2, 3 and 4 are longitudinal cross-sectional views of the main parts of the embodiment of FIG. 1, showing states in different operating cycles. 1, 2...first or second turret, 4...
...Structure, 5...Fixed structure, 6...Bearing, 7...
... Tubular element, 8 ... Sleeve member, 9 ... Conical surface, 10 ... Outer surface, 11 ... Laminated pliers, 12
...Rear part, 13...Lever member, 14...Pin,
15...Molding end, 16...Slot, 17...
Pin extension part, 18... Bearing, 19... Radial cam surface, 20... Hollow shaft, 21... Sleeve, 22... Tappet lever, 23... Roller type cam, 24... Spring, 25... Spring, 27...button transfer member, 28...head, 29...tail, 3
0...Cross piece, 31...Tape stem,
32... Tubular element, 35... Spring, 36... Slot, 37... Inclined surface, 38... Shaft, 39
... end, 40 ... balance lever, 42 ... roller, 43 ... cam surface, 44 ... compression spring.

Claims (1)

[Claims] 1. First and second gripping pliers 11, 1
1a and are rotatable about their respective axes A, A2 such that the first and second pliers 11, 11a substantially face each other in a certain position. Turret 1,
2; and means 8, 8a for controlling the opening and closing of the pliers 11, 11a at the positions, the button gripping and transferring device for a button processing machine,
and in conjunction with the second priors 11, 11a,
first and second transfer means 27, 27a for transferring a button from said first pliers 11 to said second pliers 11a, said transfer means 27, 27a for transferring a button from said first pliers 11 to said second pliers 11a; Means 27,2
7a to the first and second priors 11, 11a
while moving the first
cam means 37, 37a for transferring the button from the first pliers 11 to the second pliers 11a between the first and second pliers 11, 11a. Portable transfer device. 2. The button gripping and transporting device according to claim 1, in which the first and second transporting means 27, 27a have a first element 28 that engages one of the button surfaces, and a first element 28 that engages one of the button surfaces. a second element 28a that engages the other in the same direction such that the first and second elements 28, 28a transfer the button from said first pliers 11 to said second pliers 11a. A button gripping and transferring device for a button processing machine, characterized in that the buttons move in unison. 3. In the button grasping and transferring device according to claim 1 or 2, the first and second button
A button gripping and transporting device for a button processing machine, characterized in that the transporting device 27, 27a has at least one rod-like element 31, 31a. 4. In the button gripping and transferring device for a button processing machine according to any one of claims 1 to 3, the first and second transferring means 27,
A button gripping and transferring device for a button processing machine, characterized in that each of the buttons 27a has a surface that presses and supports opposing surfaces of the button. 5. In the button transfer device for a button processing machine according to any one of claims 1 to 4, the first and second transfer means 27, 27a
A button gripping and transferring device for a button processing machine, characterized in that a button is coaxially mounted on each plier 11, 11a. 6. In the button gripping and transfer device for a button processing machine according to any one of claims 1 to 5, the transfer means 27, 27a move the pliers 11 under the control of the cam means 43, 43a. ，
A button gripping and transporting device for a button processing machine, characterized in that it can be moved in the axial direction with respect to 11a. 7. In the button gripping and conveying device for a button processing machine according to claims 1 to 6, the first and second conveying means 27, 27a include rod-like elements 31, 31a, and the button A button gripping and transporting device for a button processing machine, characterized in that the end of this rod-like element 31, 31a opposite the surface engages with a cam surface.