JPH087936Y2 - Back gauge device for press brakes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a back gauge device for a hydraulic press brake, which is particularly suitable for a small hydraulic press brake.

(Prior Art) Conventionally, a back gauge device for a small hydraulic press brake includes an abutting member, a DC motor for moving the abutting member back and forth, an LM guide, and a ball screw.

To move the abutting member up and down, an operator puts his / her hand from the side of the C-shaped frame, which is the body of the press brake, or from the rear side to adjust the vertical movement.
Further, the back gauge frame that supports the LM guide and the ball screw has a U-shape that opens upward.

(Problems to be solved by the invention) By the way, in the above-described conventional small-sized hydraulic press brake back gauge device, the LM guide and the ball screw are supported on the back gauge frame that opens upward, and the back and forth movement is performed by the motor. However, dust and dust are likely to adhere to the surfaces of the LM Guide and ball screw, significantly reducing the durability of the parts. Further, since the up and down adjustment of the abutting member is performed by hand, there is a problem that the safety of the operator is impaired.

[Structure of the Invention] (Means for Solving the Problems) In view of the conventional problems as described above, the present invention provides a back gauge frame fixed to a machine body of a press brake by extending the back gauge frame in the front-rear direction, and The cross section of the gauge frame is formed in an inverted U shape that opens downward, and a rail extending in the front-rear direction and a ball screw are attached to the lower surface of the back gauge frame so that it can be moved back and forth on the rail. A guide member supported by the above and a nut member movably screwed to the ball screw are provided with a U-shaped bracket surrounding the lower portion and both sides of the back gauge frame in three directions, and the upper portion of the bracket is provided. An abutting member is provided on the attached back gauge base so as to be vertically movable.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 7 and FIG. 8, the compact hydraulic press brake 1 is provided with a die 9 on a lower table 5 of a machine body 3 via a supporting member 7, and is shown in an upper frame 11 of the machine body 3. Although omitted, a ram that moves up and down by a hydraulic cylinder, etc.
13 is provided, and a punch 17 is provided at the lower end of the ram 13 via a support member 15. Furthermore, the opening where the plate material is inserted
A back gauge device 21 is provided on the rear side of the bending position of 19, and an operation panel 23 is provided on the side surface of the machine body 3 for raising and lowering the ram 9 and for controlling the position of the back gauge device 21.

With the above configuration, the plate material set at a predetermined position by the back gauge device 21 is bent by the punch 17 provided on the ram 13 and the die 9 provided on the lower table 5 in cooperation with the vertical movement of the hydraulic cylinder. Will be done.

The back gauge device 21 will be described in more detail.

Referring to FIGS. 1 to 5, the plate member is inserted from the left side in FIG. 1, and the lower table 5 and the upper frame 11 are inserted.
The back gauge device 21 is provided rearward (to the right in FIG. 1) from the bending position of the opening 19 provided between the airframe 3 and the body 3
The back gauge frame 25 is integrally provided in the.
This back gauge frame 25 is U-shaped and has an opening at the bottom, and the back gauge frame 25 is built into the outside of the back gauge frame 25 and hangs down from the back gauge base 29 supporting the abutting member 27. bracket
31 is installed.

The bracket 31 is provided with a guide member 33, for example, an LM guide nut, and a rail that engages with the guide member 33.
The reference numeral 35 is provided inside the back gauge frame 25.

Adjacent to the guide member 33, for example, a nut of a ball screw, which is a nut member 37, is locked to the bracket 31, and both ends of the ball screw, which is a screw body 39 with which the nut member 37 is screwed, have the back gauge frame 25. Is rotatably supported by bearings 41 and 45 provided on the bearings 43 and 45.

(See FIG. 3) A pulley 49, which is a driving member 47, is locked to one end of the screw body 39, and a motor 51 is provided on a bracket 50 hanging from the back gauge frame 25. This motor
A pulley 53, which is a drive member 47, is attached to the output shaft of 51, and a belt 55 such as a timing belt is wound between the pulley 53 and the pulley 49, and the rotation of the motor 51 is transmitted to the screw body 39.

In order to detect the forward and backward limit of the nut member 37, a bracket 57 is provided with a dog 57, and a limit switch 59 operated by the dog 57 is provided on the front and rear end sides of the back gauge frame 25 side.

With the above configuration, the motor 51 is driven to rotate the screw body 39 via the drive member 47. The rotation of the screw body 39 causes the nut member 37 to move forward and backward, and the back gauge base 29 moves forward and backward via the bracket 31 to which the nut member 37 is locked. Since the back-and-forth movement of the back gauge base 29 is guided by the guide member 33 engaged with the rail 35,
Can move forward and backward smoothly.

On the other hand, the abutting member provided on the back gauge base 29
27 is incorporated in a pedestal 61 provided on the back gauge base 29, and the abutment member 27 is screwed to a vertically provided screw body 67 via a joint 65 from a motor 63 provided on the pedestal 61. is there.

As shown in FIG. 5, the abutting member 27 has a plate 69 made of a wear-resistant material attached to the tip by bolts 71, and bosses 73 are provided on both sides as a guide when the abutting member 27 moves up and down. There is. A guide rod 77 provided on the mount 61 is engaged via a ball bearing 75 provided in the boss 73 so that the guide rod 77 can slide up and down. In order to detect the upper and lower limits of the abutting member 27, a dog 79 is provided on the abutting member 27, and a limit switch 81 is provided on the side surface of the mount 61.

With the above configuration, it is possible to drive the motor 63 and rotate the screw body 67 to match the height position of the abutting member 27 with the plate material.

FIG. 6 shows the details of the operation panel 23, which is used for raising and lowering the ram 13 and for controlling the position of the back gauge device 21.
Switches, MDI keys, display lamps, various elements for NC control, and a switch for raising and lowering the butting member 27 of the back gauge device 21 are provided.

As described above, the height of the abutting member 27 is adjusted by the motor.
By performing the operation by 63, it is possible to work remotely, and it is not necessary for the operator to manually operate as in the conventional case, and it is possible to improve the safety of the operator. Also, the abutting member
Since the nut member 37, the screw body 39, the guide member 33, the rail 35, etc., which are the drive system for setting the 27 at a predetermined position, are all housed in the back gauge frame 25, dust and dust do not adhere. Therefore, the durability of parts can be improved.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, in short, the present invention provides the back gauge frame (25) fixed to the machine body (3) of the press brake by extending the back gauge frame in the front-rear direction. The back gauge frame (25) is provided with a cross-sectional shape formed in an inverted U shape that opens downward, and the rail (35) and the ball screw (39) extending in the front-rear direction are attached to the back gauge frame (25). The back gauge is attached to the lower surface of the back guide, and the guide member (33) movably supported by the rail (35) and the nut member (37) movably screwed to the ball screw (39). A U-shaped bracket (31) surrounding the lower part and both sides of the frame (25) in three directions is provided, and the bracket (31)
The abutting member (27) is provided on a back gauge base (29) attached to the upper part of the above so as to be vertically movable.

As apparent from the above configuration, in the present invention,
The rail 35 and the ball screw 39 are arranged on the lower surface of the inverted U-shaped back gauge frame 25 opening to the lower side.
A guide member 33 and a ball screw that are supported by 35 so as to be movable back and forth.
The back gauge base 29 is supported by a U-shaped bracket 31 attached to a nut member 37 screwed to 39.

That is, in the present invention, by disposing the rail 35 and the ball screw 39 on the lower surface of the inverted U-shaped back gauge frame 25, dust is prevented from adhering to the sliding portions of the rail 35, the ball screw 39 and the like. It is possible to prevent it, and it is possible to suppress failure and the like.

[Brief description of drawings]

1 to 5 show the main part of the present invention, FIG. 1 is an enlarged sectional view taken along the line I--I in FIG. 7, FIG. 2 is a plan view in FIG. 1, and FIG. Enlarged explanatory view of the screw body,
FIG. 4 is a left side view in FIG. 1, FIG. 5 is a sectional view taken along the line VV in FIG. 4, FIG. 6 is an explanatory view of the operation panel, and FIGS. FIG. 7 is a front view and FIG. 8 is a side view in FIG. 7, showing a small hydraulic press brake for carrying out the present invention. 1 …… Small hydraulic press brake 21 …… Back gauge device 25 …… Back gauge frame 27 …… Abutting member 29 …… Back gauge base 31 …… Bracket, 33 …… Guide member 35 …… Rail, 37 …… Nut member 39 …… Screw body, 47 …… Drive member 51 …… Motor, 63 …… Motor 67 …… Screw body

Claims (1)

[Scope of utility model registration request] 1. A back gauge frame (25) fixed to a machine body (3) of a press brake is provided extending in the front-rear direction, and the cross-sectional shape of the back gauge frame (25) is an inverted U opening downward. The rail (35) and the ball screw (39), which are formed in a V shape and extend in the front-rear direction, are attached to the lower surface of the back gauge frame (25) and are supported by the rail (35) so that the rail (35) can move back and forth. The guide member (33) and the nut member (37) movably screwed into the ball screw (39) are attached to the back gauge frame (2
5) A U-shaped bracket (31) that surrounds the lower part and both sides of 3) is provided, and the butting member (27) is mounted on the back gauge base (29) attached to the upper part of the bracket (31). A back gauge device for a press brake, which is provided so as to be vertically movable.