JPS592904Y2 - Press rotary clamper device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotary clamper in a press.

A rotary clamper is a type of clamper in which the head of the clamp rod and the mold are attached and detached by rotating the clamp rod.

This type of device used a rack to rotate the clamp rod, but it had the disadvantage that the device as a whole was long because of the need to seal the pressure fluid that operates the clamper.

Furthermore, in conventional rotary clampers, in order to avoid interference between the clamp rod and the bolster, it is necessary to lower the clamp rod below the bolster and wait while the bolster is running; This method requires a long stroke, increases the time required for clamping and unclamping operations, and has the disadvantage that the setup time for changing molds becomes longer.

The present invention has been made in order to provide a rotary clamper that eliminates these drawbacks.

Hereinafter, one embodiment of the present invention will be explained in detail.

In FIG. 1, a bolster 2 is provided on a bed 1 so as to be movable and ascendable, and a mold 3 is placed on the bolster.

A cylinder 4 is fixed to the bed 1, and a piston 5 is inserted therein.
is provided so that it can be raised and lowered by pressure fluid.

That is, the piston 5 descends when pressure fluid is supplied to the opening 4a, and rises when pressure fluid is supplied to the opening 4b.

The rod 7 is fixed to the piston 5, fits into the cap 17 of the cylinder 4, and serves to prevent the piston 5 from rotating.

The piston rod 6 is fixed to the piston 5, and a head 8 is fixed to the tip.

The head 8 has a groove oriented in the running direction of the bolster 2 for engaging the clamp rod 9.

The clamp rod 9 is provided within the bolster so that it can move up and down and is rotatable.

An eccentric member is fixed to the lower end of the clamp rod 9, and this eccentric member engages with a groove in the head 8.

The housing 15 is fixed to a bolster, and a bottom plate 16 is fixed to this.

The sleeve 11 is provided between the stepped portion of the clamp rod 9 and a nut 14 having an oval planar shape screwed into the upper end of the clamp rod, and is prevented from rotating relative to the clamp rod 9.

The mold 3 is provided with a notch for engaging with a nut 14.

A separable bearing 18 is incorporated between the upper surface of the stepped portion of the sleeve 11 and the upper portion of the hole of the housing 15.

A pin 12 fixed to the housing 15 is inserted into the notch of the sleeve 11 to restrict rotation of the sleeve 11 within a range of 90° as shown in FIG.

The spring 10 has its ends fixed to the sleeve 11 and the bottom plate 16 in a twisted state.

That is, the clamp rod 9 is constantly biased by the rotational force by the spring 10 via the sleeve 11.

The spacer 13 is provided to match the outer diameter of the sleeve 11.

This serves as a stopper for the clamp rod 9 when the piston 5 descends without the mold.

The effect will be explained below.

In FIG. 2, when the pressure fluid supplied to the opening 4a is discharged and the pressure fluid is supplied to the opening 4b, the piston 5,
The head 8 rises together with the piston rod 6.

In synchronization with this, the bolster 2 is raised by a lifting device (not shown).

The clamp rod 9 is slightly raised by the action of the spring 10, and the nut 14 is separated from the mold 3 to be in an unclamped state, and the eccentric member creates a slight gap in the vertical direction with respect to the groove of the head 8.

In this state, the bolster 2 can travel.

Since the mold 3 is positioned on the bolster 2 by a conventional means (not shown) that fits its hole into a pin provided upright on the bolster 2, there will be no misalignment even if the bolster 2 moves in an unclamped state. will not occur.

When the bolster 2 moves and the clamp rod 9 comes off the head 8, the clamp rod 9 is rotated at 90° by the action of the spring 10.
As the nut 14 rotates, the nut 14 also rotates 90 degrees, and the nut 14 comes out of the notch of the mold.

In other words, the mold can be taken out above the bolster.

When a new mold is placed on the bolster and comes close to the fixed position on the bed, the eccentric member at the lower end of the clamp rod 9 comes into contact with the edge of the groove in the head 8, so the clamp rod 9 is moved by the movement of the bolster 2. It rotates 90' as it moves.

(FIG. 6) In this state, the nut 14 can be locked into the notch of the mold 3.

(Fig. 3) When the eccentric member engages with the groove of the head 8 (Fig. 5) Pressure fluid is discharged from the opening 4b, and the pressure fluid is transferred to the opening 4.
If supplied to a, the clamp rod 9 will be clamped by the action of the piston 5.
descends and clamps the mold 3.

In synchronization with this operation, the bolster is lowered by the lifting device.

At this time, the stroke length of the piston 5 is greater than the sum of the vertical distance of the bolster 2 and the distance between the nut 14 of the clamp rod 9 and the mold 3, and the clamped state is maintained.

(Fig. 1) Since the present invention has the above-mentioned configuration, (a) it is a compact and inexpensive rotary clamper device.

(b) Since the bolster 2 does not have a notch as in the conventional case (a round hole in the present invention), scrap and processing oil can be easily disposed of.

(c) There is an advantage that the stroke of the clamp rod does not need to be as long as in the past.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view when clamped, Fig. 2 is a longitudinal cross-sectional view when unclamped, Fig. 3 is a top view, Fig. 4 is a cross-sectional view IV-IV in Fig. 2, and Fig. 5 is a longitudinal cross-sectional view when unclamped. 6 is an explanatory diagram when the clamp rod 9 is engaged with the head 8, 1 is the bed, 2 is the bolster, 3 is the mold, 4 is the cylinder, 5 is the piston, and 6 is piston rod,
7 is a rod, 8 is a head, 9 is a clamp rod, 10 is a spring, 11 is a sleeve, 12 is a pin, 13 is a spacer,
14 is a nut, 15 is a housing, 16 is a bottom plate, 17 is a cap, and 18 is a bearing.

Claims (1)

[Scope of utility model registration request] A cylinder installed on the bed of the press, a piston built into the cylinder so that it can move up and down and not rotate, and a piston rod that is fixed to the tip of the piston rod that passes through the cylinder upward from the piston, and is fixed to the tip of the piston rod that extends in the direction of travel of the bolster. A head having a groove facing the head and retracting from the top surface of the bed, a housing provided at a position corresponding to the cylinder of a bolster that can move freely and land at a fixed position on the bed, and a housing that can be raised and lowered by the housing and has an upper limit regulated. , and the head is rotatably provided, and has an oval-shaped nut fixed at its tip that can be freely engaged and detached from the notch of the mold, has a stepped part in the middle part, and has a stepped part at its lower end, and is raised at its upper limit. A clamp rod is located at the height of the groove, and has an eccentric member fixed thereon that contacts the edge of the groove and rotates 90 degrees to engage as the bolster travels, and between the stepped part of the clamp rod and the nut. It is fixed on the exterior and engages with a pin provided on the housing to adjust the rotation angle e of the clamp rod.
90", both ends of which are fixed to the lower surface of the sleeve and the lower part of the housing, and the clamp rod is urged upward through the sleeve, and the clamp rod comes into contact with the groove of the head. A rotary clamper device for a press, characterized in that it includes a spring that is biased to rotate in a direction opposite to the direction in which it contacts and rotates.