JP3057231B1 - Closing machine automatic opening cam mechanism - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To provide a conventional automatic opening cam mechanism for a closing machine which has a shaft support portion perpendicular to a rear seat direction (cylinder axis) and requires a space in which an automatic opening arm can rotate freely. The minimum rear seat length that can be automatically opened is long, and when the rear seat length is short, automatic opening of the closing machine is impossible. SOLUTION: The automatic opening / closing cam mechanism of the closing machine according to the present invention is such that a cam follower (5) of an automatic opening arm (4) is a cam body.
Since the cam body (1) is rotated by the pin (20) while sliding on the cam surface (11) on the outer periphery of (1) and positioned on the top surface (12),
The engagement between the cam body (1) and the cam follower (5) is released, and the self-opening arm (4) slides on the side of the cam body (1) and turns, so that the minimum rear seat length that can be automatically opened is the same as before. This is a configuration that can be reduced to about half.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening cam mechanism of a closing machine, and more particularly, to a cam mechanism in which a cam follower of an automatic opening arm slides so as to be rotatable so that a minimum rear seat length which can be automatically opened is conventionally known. The present invention relates to a new improvement for achieving an automatic opening when the rear seat length is short, a downsized cam mechanism, and the like.

[0002]

2. Description of the Related Art Conventionally, as this type of automatic closing cam mechanism of a closing machine which has been used, for example, the construction shown in FIGS. 8 to 11 can be mentioned. That is, as shown in FIG. 8, a cam follower 5 of an automatic opening arm 4 provided on a crankshaft 3 for opening and closing a closing machine (not shown) is slidably provided in a cam groove 2 of the cam body 1. Provided, the engagement with the cam groove 2 is released and the automatic release arm 4 is released.
Shows a state in which the closing machine is turned from an open state to a closed state. 9 shows the state of the rear seat, FIG. 10 shows the state of the return seat, and FIG. 11 shows the configuration of the cam groove 2 of the cam body 1.

[0003]

The conventional automatic cam mechanism for opening a closing machine has the following problems because it is configured as described above. That is, when the minimum rear seat length that can be automatically opened is long and the rear seat length is short, it is impossible to automatically open the closing machine. Further, since the cam follower of the automatic opening arm enters the cam groove at a relatively early stage of the returning speed, the automatic opening cam may flutter due to the inertia force of the closing machine, and the cam follower comes off the cam groove. There was something.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in particular, the cam follower of the self-opening arm is made rotatable so that the cam body can be automatically opened to the minimum after opening. It is an object of the present invention to provide a closing mechanism automatic opening / closing cam mechanism in which the seat length is reduced to about half that of the conventional one, and automatic opening when the rear seat length is short, miniaturization of the cam mechanism, and the like are achieved.

[0005]

According to the present invention, an automatic opening cam mechanism for a closing machine according to the present invention is provided by rotating an automatic opening arm having a cam follower which slides on a cam surface of a cam body in conjunction with a rear seating operation and a return seating operation. In a closing machine automatic opening cam mechanism configured to open and close the closing machine, a shaft support portion rotatably supporting the cam body, a pin provided in a cylinder tail device having the automatic opening arm, and the cam A top surface formed on the surface, and a bent projection formed at an end of the cam body, wherein the closing machine is opened when the cam follower is engaged with the top surface, and the closed state is opened under the open state. When the pin engages with the bent projection, the cam body rotates, the engagement between the top surface and the cam follower is released, and the automatic opening arm rotates to close the closing machine. With the configuration That.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a closing machine automatic opening cam mechanism according to the present invention will be described below with reference to the drawings. Note that the same or equivalent parts as those in the conventional example will be described using the same reference numerals. In FIG. 1, reference numeral 1 denotes a cam body which is fixed to the launching device via a shaft support 10 so as to be rotatable in the direction of arrow C in FIG. Cam surface 1 in the up state
1, a flat top surface 12 and an end portion 14 formed at the end of a slope 13 in a down state. The end portion 14 has a bent projection projecting in a direction orthogonal to the surface direction of the cam body 1. 15 (shown particularly in FIG. 5).

Next, the above-described cam body 1 and the automatic opening arm 1
5 and the relationship with the closing machine 16 will be described. First, FIG.
As shown in FIG. 2, an automatic opening arm 4 rotatably provided by a crankshaft 18 is provided on the well-known cylinder tail device 17 side. The automatic opening arm 4 is provided with a cam follower 5. A closing machine 16 is arranged on the cylinder tail device 17 so as to be able to open and close (vertically move) in conjunction with the rotation of the automatic opening arm 4.

Next, the operation will be described. In FIG. 3, when the cylinder tail device 17 moves and the returning operation is performed, the cam follower 5 goes up with the cam surface 11 of the cam body 1 shown by a dotted line, and the cam follower 5 is located on the top surface 12 of the cam body 1. Then, the automatic opening arm 4 becomes substantially horizontal, and the closing machine 16 rises in conjunction with the rotation of the automatic opening arm 4, and the closing machine 16 enters the open state. In this open state,
When a well-known closing machine lock shaft (not shown) is operated, the closing machine 16 is operated.
Are held in a locked state.

Further, the pin 20 provided on the side of the cylinder tail device 17 at the end of the return seating of FIG.
Since the cam body 1 rotates in the direction of arrow C by an amount corresponding to the amount of projection of the bent projection 15, the engagement between the cam follower 5 and the top surface 12 is released. In this state, the open state is maintained by the above-described closing machine lock shaft.

Next, when the lock shaft of the closing device is pulled out in the above-mentioned opened state, the spring force of a spring member (not shown) for forcibly rotating the automatic opening arm 4 in the closing direction and the weight of the closing device 16 are applied. As shown in FIGS. 6 and 7, the automatic opening arm 4 pivots and the closing machine 16 descends, and the cam body 1 further pivots in the direction of arrow C to enter the closed state. After firing in this state, when the cylinder tail device 17 shifts to the rear seating state, the cam follower 5 is disengaged from the cam body 1, and the cam body 1 returns to the original state of FIG. Can be performed.

[0011]

As described above, the automatic cam mechanism for closing machine according to the present invention has the following advantages. That is, since the minimum rear seat length that can be automatically opened can be made shorter (about half) than before, automatic opening is possible even when the rear seat length is short. Further, the returning speed when the cam follower comes into contact with the cam body can be reduced, and a smooth closing machine opening speed can be obtained. Further, the size and weight of the cam mechanism can be reduced. In addition, the rear cam follower slides only on the side surface of the cam body (conventionally, the cam rotates at a high speed when rear seated) and there is no chatter of the cam, so that the cam follower does not come off the cam body.

[0012]

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a closing machine automatic opening cam mechanism according to the present invention.

FIG. 2 is a configuration diagram of a main part of FIG. 1;

FIG. 3 is a configuration diagram showing an open state of the closing machine of FIG. 1;

FIG. 4 is a right side view of FIG. 3;

FIG. 5 is a configuration diagram showing a main part of FIG. 3;

FIG. 6 is a configuration diagram illustrating a closed state of the closing machine in FIG. 1;

FIG. 7 is a right side view of FIG.

FIG. 8 is a configuration diagram showing a conventional configuration.

FIG. 9 is a state diagram showing the rear seat state of FIG. 8;

FIG. 10 is a state diagram showing the returning seat state of FIG. 8;

FIG. 11 is a partial perspective view showing a conventional cam body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cam body 4 Automatic opening arm 5 Cam follower 10 Shaft support part 11 Cam surface 12 Top surface 15 Bend projection 16 Closing machine 20 Pin

Claims (1)

(57) [Claims] 1. A cam body in conjunction with a rear seating operation and a returning seating operation.
In the automatic opening cam mechanism for a closing machine which opens and closes the closing machine (16) by rotating an automatic opening arm (4) having a cam follower (5) sliding on the cam surface (11) of (1). A shaft support (10) for rotatably supporting the cam body (1).
A pin (20) provided on a tube tail device (17) having the automatic opening arm (4); a top surface (12) formed on the cam surface (11); and a cam body (1). A bent protrusion (15) formed at an end, and the cam follower (5) is provided at the top surface (1).
2), the closing device (16) is in an open state, and in the open state, the pin (20) is engaged with the bent projection (15), whereby the cam body (1) is released. Swivel, the top surface
(12) is disengaged from the cam follower (5), and the automatic opening arm (4) is rotated to close the closing machine (16). Automatic opening cam mechanism.