JPH0512293Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to an automatic opening/closing barrel used for barrel plating, etc., and in particular, the invention relates to an automatic opening/closing barrel used for barrel plating, etc., and in particular, an opening/closing lid that is automatically opened/closed by switching the rotational direction of the barrel body. It is about an automatic opening and closing barrel that can be opened and closed.

(Prior art) By extending the shaft of the opening/closing lid of the barrel body to the outside of its end plate, and engaging the lever attached to the end of the shaft with the cam of the barrel support frame, the barrel body is rotated in a fixed direction. The automatic opening/closing barrel maintains the closed state even when the opening/closing lid moves downward, and when the direction of rotation is reversed, the lever swings in the opposite direction by the action of the cam to keep the opening/closing lid open. , has been conventionally known as shown in Japanese Utility Model Publication No. 14728/1983.

As shown in this publication, the cam of the conventional automatic opening/closing barrel has a disc shape with a notch in the upper part that allows the lever to reverse, and when switching the direction of rotation, the tip of the lever is under its own weight. The structure is such that the swinging direction can be changed by falling into the notch of the cam. However, if the resistance to rotation of the opening/closing lid increases due to deformation of the end plate of the barrel body or the opening/closing lid, the tip of the lever may not fit into the cam notch properly when switching the rotation direction from the opening direction to the closing direction, causing the opening/closing There was a risk that the lid would remain open and the workpiece would be ejected, or that the tip of the lever would hit the cam from a right angle, damaging the cam.

(Problems to be solved by the invention) The present invention solves these conventional problems, allows the opening/closing operation of the opening/closing lid to be performed reliably when the rotational direction of the barrel body is changed, and also enables the opening/closing operation of the cam. It was completed to provide an automatic opening/closing barrel with no risk of damage.

(Means for Solving the Problems) The present invention, which was completed to solve the above problems, rotatably supports a barrel body with an opening/closing lid on a part of the side surface on a support frame, and the opening/closing lid is The shaft of the barrel is extended to the outside of the mirror plate of the barrel body, and a lever is attached to the tip of the shaft, and a lower cam with a recess in the upper part for automatically opening and closing the lid is installed at a position corresponding to the tip of the lever on the support frame. , an upper reversing cam having a convex portion corresponding to the concave portion is fixed thereto.

(Example) The present invention will be explained in more detail below with reference to the illustrated example.

In Fig. 1, reference numeral 1 is a barrel body with a polygonal side surface provided between two end plates 2, 2, and the entire body is rotatably supported by a central shaft 4 between support frames 3, 3, and driven by a drive gear. 6 is the gear 7 on the outer peripheral surface of the end plate 2
It has a structure that allows it to rotate in any direction by engaging with the two.

A shaft 8 is attached to a part of the side surface of such a barrel body 1.
An inward-opening opening/closing lid 9 is provided which is pivotally supported by the shaft 8, and this shaft 8 extends outwardly through the end plate 2, and a lever 10 is attached to the tip thereof. In addition, a lower cam 1 is located at a position corresponding to the lever 10 of the support frame.
1 and the upper cam 12 are fixed.

The lower cam 11 has a disc-shaped cam body with a substantially V-shaped recess 13 in the upper part thereof to allow the lever 10 to be reversed, and is used for automatically opening and closing the lid like the conventional cam. Further, the upper cam 12 exhibits a function unique to the present invention, and is for reversal, having a shallow protrusion 14 corresponding to the recess 13 of the lower cam 11, and is fixed at a position above the lower cam 11. has been done. The tip 15 of the lever 10 is adapted to engage with these cams.

(Function) Next, the function of the present invention will be explained with reference to FIGS. 2 to 10.

FIG. 2 shows a state in which the barrel body 1 is rotating clockwise (in the example, the lid closing direction).
The shaft 8 of the opening/closing lid 9 precedes the tip 15 of the lever 10 in the rotational direction. In this state, lever 1
Since the tip 15 of the barrel 0 is prevented from swinging inward by the outer circumferential surface of the lower cam 11, even when the opening/closing lid 9 comes downward while the barrel body 1 is rotating as shown in the figure, the opening/closing lid 9 cannot be opened or closed. The lid 9 never opens. On the other hand, the third
The figure shows a state in which the barrel body 1 is rotating counterclockwise, and in this state, the opening/closing lid 9 remains open and the tip 15 of the lever 10 is similarly moved inward by the outer peripheral surface of the lower cam 11. Since the swinging is restricted, the opening/closing lid 9 remains open and the workpiece is discharged.

In this way, by switching the direction of rotation, the lid 9 can be opened and closed.
The states in which the opening and closing are performed are shown in FIG. 4 and subsequent figures.

That is, as shown in FIG.
is in the recess 13 of the lower cam 11, when the barrel main body 1 rotates counterclockwise, the opening/closing lid 9 is pushed upward together with the lever 10, and the opening/closing lid 9 is in an open state. Next, as shown in FIG. 5, when the barrel body 1 is reversed, the tip 15 of the lever 10
returns while leading, and the lever 10 is moved as shown in Figure 6.
The tip 15 of the upper cam 12 comes into contact with the protrusion 14 of the upper cam 12. When the barrel body 1 is further rotated, the seventh
As shown in the figure, the tip 15 of the lever 10 is pushed further downward, and when the state shown in FIG. 8 is reached, the lever 10 is further rotated by the right side of the recess 13 of the lower cam 11, and the state shown in FIG. 9 is reached. The opening/closing lid 9 will be closed as shown in FIG.

Figures 4 to 10 show the changes when the opening/closing lid 9 is closed when it is open, but since the lower cam 11 and the upper cam 12 are symmetrical, the closed state can be achieved by reversing the direction of rotation. The opening/closing lid 9 can also be opened in exactly the same way.

In this way, in the present invention, the tip 15 of the lever 10 first hits the upper cam 12 and is forcibly rotated downward while being guided, and then the lower cam 11
Since it is inverted at the recess 13 of the
Unlike the conventional method of dropping into 3,
Even if the rotational resistance of the shaft 8 becomes large, the opening/closing lid 9 can be opened and closed reliably. Further, in the present invention, the tip end 15 of the lever 10 is connected to the upper cam 12.
Since the lower cam 11 is guided by the lower cam 11, there is no risk of hitting the lower cam 11 from a right angle direction as in the conventional case, and damage to the cam can be reliably prevented.

(Effects of the invention) As explained above, the present invention makes it possible to reliably open and close the lid by switching the direction of rotation of the barrel body, and also to reliably prevent the risk of damage to the cam. Therefore, its practical value is extremely great as it solves the problems of conventional automatic opening/closing barrels of this type.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a side view showing the opening/closing lid in a closed state, Fig. 3 is a side view showing the opening/closing lid in an open state, and Figs.
6, 7, 8, 9, and 10 are side views illustrating the process in which the opening/closing lid changes from an open state to a closed state by switching the rotation direction. . 1...Barrel body, 2...End plate, 3...Support frame, 8...Shaft, 9...Opening/closing lid, 10...Lever,
11... lower cam, 12... upper cam, 13...
Concave portion, 14...Convex portion, 15...Tip portion.

Claims (1)

[Scope of utility model registration request] A barrel body 1 having an opening/closing lid 9 on a part of the side surface is rotatably supported by support frames 3, 3, and the shaft 8 of this opening/closing lid is extended to the outside of the end plate 2 of the barrel body 1 and attached to its tip. The lever 10 is attached, and a lower cam 11 for automatic lid opening/closing with a recess 13 on the upper part and a protrusion 14 corresponding to the recess 13 are installed on the support frame 3 at a position corresponding to the tip 15 of the lever 10.
An automatic opening/closing barrel characterized in that an upper cam 12 for reversing is fixed.