JPH10323719A - Cope holder for folding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upper mold for a folding machine capable of improving safety of preventing falling down of the upper mold at the time of detaching thereof from a upper mold holder, and to easily draw down the upper mold, bringing about the reduction in operation cost. SOLUTION: A upper mold holder device for folding machine comprises a upper mold 15 installed removable by a upper mold clamp 17 to a upper mold holder 11 positioned at a lower end part of an upper table 1 of the folding machine. At the lower end part of the upper mold clamp 17, an engagement protrusion 31 is installed to divide the upper part of an anti-falling groove 29, prepared at the upper area of main body of upper mold 15A of upper mold 15, into segmental units lengthwise of upper mold 15, and the vertical grooves 37 are installed at an alternate segmental positions. Further, the engagement protrusion 31 is divided into the segmental units lengthwise of the upper mold clamp 17, and the vertical groove 33 is set at the alternate segmental positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an upper holder for a bending machine used for a bending machine such as a press brake.

[0002]

2. Description of the Related Art Conventionally, an upper die holder is provided at a lower end portion of an upper die table in a press machine as a bending machine, for example, and a rear surface of the upper die abuts on a lower end portion of the upper die holder. An abutment surface is provided. An upper die clamp for clamping and unclamping the upper die is provided at a lower end portion of the upper die holder, and the upper die clamp is provided with a pressing surface for pressing the front side surface of the upper die rearward. .

Further, a fall prevention groove is formed on the upper front side of the upper mold, and an engagement projection engaged with and disengaged from the fall prevention groove is integrally provided on a rear side of a lower end portion of the upper mold clamp. Have been. Accordingly, the engaging protrusion integrally provided on the upper mold clamp is engaged with the fall prevention groove provided on the upper mold, thereby preventing the upper mold from falling.

[0004]

By the way, in the above-mentioned conventional construction, for example, when removing the upper die having a width smaller than the width of the upper die clamp, if the upper die clamp is loosened from the machine body side of the press brake. In some cases, a rotating force may be applied to the upper mold. In this case, the function of preventing the fall by the engagement protrusion of the conventional upper mold clamp and the fall prevention groove of the upper mold alone cannot fulfill its role. When rotated, the upper die may fall due to the gravitational force that is constantly applied.

SUMMARY OF THE INVENTION It is an object of the present invention to enhance the safety of preventing the upper mold from dropping when the upper mold is removed from the upper mold holder, and to easily pull out the upper mold downward. It is to provide a device.

[0006]

According to a first aspect of the present invention, there is provided an upper die holder device for a bending machine provided at a lower end of an upper table in a bending machine. An upper die holder device for a bending machine for detachably mounting an upper die with an upper die clamp, wherein a lower end portion of the upper die clamp has a fall prevention groove formed on an upper part of an upper die body of the upper die. An upper portion of the fall prevention groove is divided into segments in the longitudinal direction of the upper die, and a vertical groove is provided at every other segment position. Are divided into segments in the longitudinal direction, and vertical grooves are provided at every other segment position.

Therefore, the upper die is clamped between the upper die holder and the upper die clamp. On the other hand, when removing the upper mold, the upper mold clamp is loosened. However, in this state, since the engaging protrusion of the upper mold clamp and the upper part of the fall prevention groove of the upper mold are at the same position, they are not dropped downward.

By moving the upper mold in the longitudinal direction by the length of the upper mold clamp and the vertical groove provided in the upper mold,
The upper part of the fall prevention groove moves to the position of the vertical groove of the upper die clamp, and the upper part of the fall prevention groove in the upper die passes downward along this vertical groove, and the upper die is easily removed.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, a lower surface of an upper table 1 (for example, in a press brake as a bending machine) (FIG.
(A lower surface in FIG. 1), a wedge member 3 is provided, and the wedge member 3 has an inclined lower surface 3A in the left-right direction (the direction orthogonal to the paper surface in FIG. 1). The wedge member 3 is provided in the intermediate member 5 via the elongated hole 7 and the mounting bolt 9 so that the position can be adjusted in the left-right direction.

The intermediate member 5 is integrally provided with an upper die holder 11 via mounting bolts 13. The upper die holder 11 has an inclined upper surface 11A inclined corresponding to the inclined surface 3A of the wedge member 3. It has. Further, the upper die holder 11 has a contact surface 11B to which the upper rear side surface 15B of the upper die body 15A in a plurality of divided upper dies 15 as the upper die can contact.
And an abutment surface 11C that can abut against the step surface 15C of the upper die body 15A.

An upper mold clamp 17 is provided on a lower end surface of the upper mold holder 11 via a pair of fixed holders 19. 1 in a direction perpendicular to the plane of the drawing). The upper die clamp 17 includes a pressing member 21 that presses the upper front side surface of each upper die body 15A of the plurality of split dies 15 in a rearward direction (to the right in FIG. 1). Clamping and unclamping directions (clockwise in FIG. 1)
It is configured to be swingable by a small amount.

In order to swing the upper mold clamp 17 in the clamping and unclamping directions, a contact screw 23 abutting on the upper mold holder 11 is screwed onto the upper part of the fixing bolt 19 in the upper mold clamp 17. The contact screw 23 is provided with a clamp lever 25. A spring 27 is provided between the upper clamp 17 and the upper holder 11 of the fixing bolt 19 so as to bias the upper clamp 17 forward (toward the head of the fixing bolt 19).

In order to prevent each of the upper mold bodies 15A of the plurality of divided upper molds 15 from dropping when the pressed state by the pressing surface 11B of the upper mold holder 11 is released, the upper front side surface of each of the upper mold bodies 15A. Is provided with a fall-preventing groove 29 extending in the left-right direction.
Is provided.

As shown in FIG. 2, the engaging projection 31 provided on the upper mold clamp 17 is
7 in the longitudinal direction (the left-right direction in FIG. 2) in units of segments, and a vertical groove 3 is provided at every other segment position.
3 are provided. The upper part 35 of the fall prevention groove 29 provided in the upper die body 15A of the split mold 15
Is divided into a plurality of segments in the longitudinal direction of the upper die 15, and a vertical groove 37 is provided at every other segment position. The segment of the engagement projection 31 and the segment of the upper portion 35 of the fall prevention groove 29 have the same width.

With the above configuration, as shown in FIG. 1, the upper die body 15A of the divided upper die 15 is clamped between the upper die holder 11 and the upper die clamp 17. On the other hand, when removing the split upper mold 15, the clamp lever 25 is first rotated and loosened. However, in this state,
Since the engagement protrusion 31 provided at the lower end of the upper mold clamp 17 and the upper portion 35 of the fall prevention groove 29 in the upper mold body 15A are at the same position, the upper mold body 15A does not fall downward. Since these shapes are sufficiently large, the upper die body 15
Even if A shakes, it does not drop unexpectedly.

The upper die body 15A of the split upper die 15 is aligned with a vertical groove 33 provided in the upper die clamp 17 in the longitudinal direction of the split upper die 15 so as to coincide with the upper portion 35 of the upper die body 15A. When moved by the length, the upper die body 1
The upper portion 35 of 5A moves to the position of the flute 33,
The upper portion 35 of the upper mold body 15A passes downward along the upper mold body 15A, and the upper mold body 15A can be easily removed from the upper mold clamp 17.

The present invention is not limited to the above-described embodiment of the invention, but can be embodied in other forms by making appropriate changes.

[0019]

As will be understood from the above embodiments of the present invention, according to the first aspect of the present invention, the upper die is clamped between the upper die holder and the upper die clamp.
On the other hand, when removing the upper mold, the upper mold clamp is loosened.
However, in this state, since the engaging protrusion of the upper mold clamp and the upper part of the fall prevention groove of the upper mold are at the same position, they are not dropped downward.

By moving the upper die in the longitudinal direction by the length of the upper die clamp and the vertical groove provided in the upper die,
The upper part of the fall prevention groove moves to the position of the vertical groove of the upper die clamp, and the upper part of the fall prevention groove in the upper die passes downward along this vertical groove, so that the upper die can be easily removed.

[Brief description of the drawings]

FIG. 1 is a side view of an upper die holder device for a bending machine according to the present invention.

FIG. 2 is an enlarged perspective view of an engagement protrusion at a lower end of the upper mold clamp.

FIG. 3 is an enlarged perspective view of a fall prevention groove portion of an upper die body in a split upper die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper table 11 Upper die holder 15 Split upper die (upper die) 15A Upper die main body 17 Upper die clamp 29 Fall prevention groove 31 Engagement projection 33 Vertical groove 35 Upper part 37 Vertical groove

Claims (1)

[Claims] An upper die holder device for a bending machine, wherein an upper die is detachably mounted on an upper die holder provided at a lower end portion of an upper table in the bending machine by an upper die clamp. At the lower end of the upper die, an engaging projection is provided which is engageable with a fall prevention groove formed on the upper die body of the upper die, and the upper part of the fall prevention groove is divided into segments in the longitudinal direction of the upper die. And a vertical groove is provided at every other segment position, and the engaging projection is divided into segments in the longitudinal direction of the upper die clamp, and a vertical groove is provided at every other segment position. Upper die holder device for bending machine.