JP3356344B2 - Bending machine backstop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backstop device for a bending machine for bending a plate-shaped work.

[0002]

2. Description of the Related Art Conventionally, a bending machine such as a press brake is provided with a backstop device for positioning a bending position by abutting a tip end of a work. Conventional backstop devices include, for example, Japanese Utility Model Laid-Open No. 3-68922, Japanese Utility Model Laid-Open No. 3-68923,
As proposed in Japanese Patent Application Laid-Open No. 3-221226, a control device such as an NC automatically controls the position of the abutting portion. In some cases, the position of the contact portion is adjusted.

[0003]

In a system in which the position of the abutting portion is automatically controlled by a control device, N
Since a complicated control device such as C is required, there is a problem that the entire device becomes expensive. In the case of manually adjusting the position by turning to the rear of the folding machine body, the adjustment work is troublesome and it takes time to adjust, so the work efficiency is poor and it is necessary to work inside the folding machine body. There are problems such as danger of work. SUMMARY OF THE INVENTION The present invention has been made in order to improve such a conventional problem, and an object of the present invention is to provide a backstop device of a folding machine that can easily and safely adjust the position of an abutting portion.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a backstop device for a bending machine which positions a bending position by abutting a tip of a work to be bent, in a vertical and a front-rear direction. A movable backstop rail is provided with a plurality of backstop bodies movably in the left-right direction, and an abutting member having an abutting surface for abutting a work tip on the backstop body, and a backstop body positioned at any position. And an insertion hole is provided in each of the backstop main bodies , and the moving means is located in front of the folding machine.
The backstop main body is movable by being inserted into the insertion hole .

[0005]

[Operation] With the above configuration, it is possible to adjust the interval of the backstop body from the near side of the folding machine, so that the adjustment according to the size of the work can be performed in a short time and safely.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view showing a backstop device of a folding machine, FIG. 2 is a plan view of the same, and FIG. 3 is a detailed view of a locking mechanism. In FIG. 1, reference numeral 1 denotes a ram of a folding machine, which can be moved up and down by an elevating means (not shown) between an upper die 2 attached to a lower portion of the ram 1 and a lower die 4 fixed on a table 3. The plate-shaped work 5 can be bent.

1 to 3 is a backstop device having a backstop rail 7 which can be moved back and forth and up and down. A linear guide rail 8a and a linear guide nut are provided on the front surface of the backstop rail 7. 8b
A guide rail 8 is laid along the back stop rail 7. A plurality of the linear guide nuts 8b are movably supported by the linear guide rails 8a, and a backstop body 10 is attached to each of the linear guide nuts 8b.

[0008] A bracket 10a is provided on the front surface of the backstop body 10 so as to project therefrom.
A stopper for stopping the butting member 11 at a horizontal position is provided at the lower end of the bracket 10a at the lower end of the bracket 10a. A bolt 13 is screwed in an adjustable manner. A hitting surface 11a for hitting the tip of the work 5 for positioning the bending position is formed at the tip of the hitting member 11.

On the other hand, the backstop body 10 uses a locking mechanism 15 for locking the backstop body 10 at an arbitrary position on the backstop rail 7 and a moving means 16 for bending the backstop body 10 from the front of the bending machine. An insertion hole 17 into which the tip of the moving means 16 is inserted when moving is performed. The locking mechanism 15 has, for example, a pair of claw bodies 15a that sandwich the back stop rail 7 from above and below as shown in FIG. These pawls 15a are formed in a substantially L-shape. One end is pivotally connected to the backstop body 10 by a pin 15b, and the other bent end is provided on the upper and lower surfaces of the backstop rail 7 by a compression spring 15c. It is lightly pressed so that the backstop body 10 does not move unnecessarily.

As shown in FIG. 2, the moving means 16 is formed of a rod having a handle 16a at one end, and an insertion hole 17 formed in the backstop body 10 can be easily inserted into a tip end thereof. In addition to the tapered portion 16b, the length is set so that the backstop body 10 reaches the backstop body 10 from the front of the bending machine even if the backstop body 10 is retracted most rearward.

Next, the operation will be described. In bending the work 5, first, the interval between the backstop bodies 10 is adjusted according to the size of the work 5, and the interval is adjusted by an operator. Moves the backstop body 10 using the moving means 16 from the near side of the folding machine without turning to the rear of the folding machine. That is, the user holds the handle 16 a of the moving unit 16 and moves the moving unit 1 from between the upper mold 2 and the lower mold 4.
6 is inserted into the insertion hole 17 of the backstop body 10, and the backstop body 10 is moved in a desired direction by the moving means 16. At this time, the locking mechanism 15 locks the backstop main body 10 to the backstop rail 7, but since the claw body 15 a of the locking mechanism 15 is lightly abutted on the backstop rail 7, the moving means 16 Thus, the backstop body 10 can be easily moved to a desired position.

As described above, the backstop body 10
Is adjusted, the backstop body 10 is moved to the positioning position, and the tip of the work 5 inserted from the near side of the bending machine is abutted against the abutting surface 11a of the abutting member 11 to position the bending position of the work 5. Since the interval between the backstop bodies 10 can be adjusted on the front side of the folding machine, the adjustment operation can be performed in a short time, and it is safe because there is no need to enter the folding machine. In the above embodiment, the locking mechanism 15 is connected to the pair of claw bodies 1.
4A, the sphere 15d may be pressed against the backstop rail 7 by a compression spring 15e to lock the backstop body 10 to the backstop rail 7, as shown in FIG.

[0013]

According to the present invention, as described in detail above, a plurality of backstop bodies provided on a backstop rail can be moved and adjusted by moving means from the near side of the folding machine. Each time the size of the workpiece changes, it is not necessary for the operator to turn around the folding machine and manually adjust the movement, so that the adjustment operation can be easily performed in a short time. In addition, since the bar-shaped moving means is inserted from between the upper mold and the lower mold to adjust the movement of the backstop body, even if the upper mold is inadvertently lowered, there is no risk of injury to workers and it is safe. Since the backstop body is locked at the adjustment position by the locking mechanism, the backstop body does not move unnecessarily during the bending process, and can be accurately positioned.
Moreover, since an expensive control device such as an NC is not required, the present invention can be implemented easily and inexpensively.

[Brief description of the drawings]

FIG. 1 is a side view of a backstop device of a bending machine according to an embodiment of the present invention.

FIG. 2 is a plan view of a backstop device of the bending machine, showing one embodiment of the present invention.

FIG. 3 is a detailed view of a locking mechanism provided in a backstop device of the bending machine according to one embodiment of the present invention.

FIG. 4 is an explanatory view of a locking mechanism provided in a backstop device of a folding machine according to another embodiment of the present invention.

[Explanation of symbols]

5 Work, 7 Backstop rail, 10 Backstop body, 11 Abutment member, 11a Abutment surface, 15 Locking mechanism, 15a Claw body, 15c Compression spring, 15d Spherical body, 15e ... Compression spring, 16: moving means.

Claims (3)

(57) [Claims] 1. A backstop device of a bending machine for positioning a bending position by abutting a tip end of a work 5 to be bent, and a backstop rail 7 which can be moved up and down and back and forth. A plurality of backstop bodies 10, and an abutting member 11 having an abutting surface 11a for abutting the front end of the work 5 on the backstop bodies 10, and a locking mechanism for locking the backstop body 10 at an arbitrary position. 15 and an insertion hole in each of the backstop bodies 10.
17 and the moving means 16 is moved from the front of the folding machine to the
A backstop device of a bending machine that is inserted into the insertion hole 17 to make each of the backstop bodies 10 freely movable. 2. The locking mechanism 15 is constituted by a pair of claw members 15a that sandwich the back stop rail 7 from above and below, and a compression spring 15c that abuts the claw members 15a on the back stop rail 7. Item 7. The backstop device according to Item 1. 3. The backstop device according to claim 1, wherein the locking mechanism 15 comprises a sphere 15d pressed against the backstop rail 7 by a compression spring 15e.