JPH069699Y2 - Dustproof device for press gauge of press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a dustproof device for a back gauge of a press machine, and more specifically, before and after moving a moving positioning member of the back gauge back and forth. The present invention relates to a back gauge dustproof device in which an actuating unit is shielded from the outside.

(Prior Art) The prior art will be described with reference to FIGS.

FIG. 7 shows a press brake 10 which is one of press machines.
1 is illustrated.

A pair of left and right brackets 105 extending rearward is fixed to the lower tool support 103 of the press brake 101,
A lead screw (not shown), which is driven to rotate by a servo motor 107, is provided on one side of the bracket 105, and a guide bar 109 parallel to the lead screw is provided on the other side.

The guide bar 109 is screwed with the lead screw.
The movable positioning member 111, which is guided to and positioned by moving toward and away from the machining center line of the lower tool (not shown) provided on the lower tool support 103, is provided with the screw column 113. A stretch 117 is provided through a female screw tube 115 that is screwed with 113.

Further, the stretch 117 is provided with a pair of stoppers 119 that abut the rear edge of the material to be processed, the position of which can be adjusted in the stretch 117 and the stopper 1
Reference numeral 19 is configured so as to be axially rotated in the upward direction and to be separated from the trailing edge of the workpiece.

In the conventional back gauge 121 as shown in FIG. 7,
The lead screw, which is a forward and backward actuating device for moving the moving positioning member 111 forward and backward, is only covered on three sides by a cover 123, and no dustproof device is provided on other guide portions or screwed portions.

FIG. 8 shows another example in which the movement positioning member 111 is covered with the dustproof cover 123. The movement positioning member 111 is entirely covered with the dustproof cover 123, but the plate-like arm 125 has the grooves 127 of the left and right dustproof covers 123. Since it protrudes through, it is defenseless against dust entering from the side.

FIG. 9 shows a third conventional example, in which the movable positioning member 111 is provided with the Z-shaped plate-like arm 125 provided with the nut member 131 screwed with the lead screw 129, provided on the bracket 105 described above. It projects to both left and right beyond the upper surface cover 133 and the lower surface cover 135.

In the dustproof covers 133 and 135 of the conventional example of FIG. 9, when the plate-shaped arm 125 and the nut member 131 move, the downward opening groove remains between the upper surface cover 133 and the lower surface cover 135 as illustrated. The threaded portion of the lead screw 129 is almost defenseless.

(Problems to be Solved by the Invention) As is clear from the description with reference to FIGS. 7, 8 and 9, the conventional moving positioning member 11 of the back gauge 121 is provided.
The first drive portion has an incomplete dustproof function, and in particular, the portion where the plate-like arm 125 has moved to be absent has the disadvantage that the open groove remains open.

If the dustproof function is incomplete, it goes without saying that the accuracy of movement and positioning deteriorates, the sliding parts including screws are worn in a short time, and the life of the back gauge device is shortened.

[Structure of the Invention] (Means for Solving Problems) In view of the above-mentioned conventional problems, the present invention is a dust preventive device for a back gauge of a press machine, which moves a moving positioning member in the back gauge back and forth. And a bracket supporting the front-rear actuating device for extending in the front-rear direction, a cover for covering the front-rear actuating device being supported by the bracket, and a part of the movable positioning member that is moved back and forth by the front-rear operating device. Is provided in the front-rear direction with an opening groove portion in the front-rear direction for projecting to the outside of the cover, and is provided with a stopper for positioning the processing machine mounted on the moving positioning member, and the stopper is provided near both ends of the opening groove portion. A pulley rotatably supported by the bracket is provided with a ring-shaped belt that occludes the opening groove portion so that the ring groove can be shielded. Those formed by linking the timber.

(Embodiment) FIG. 1 is a plan view of a back gauge 1 as an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. Further, this embodiment is shown as an example in which it is applied to a press brake (101 in FIG. 7) which is one of the press machines, but it is of course applicable to other press machines.

This back gauge 1 is provided with fixed small teeth 7 of a linear motor fixed to the center of the upper surface of a bracket 5 attached to an abutment 3 of the lower tool of the press brake, and as shown in FIG. Has an approximately H-shaped cross section.

A moving positioning member 15 is provided which rides on the two flange portions 9 and 9 with four wheels 11 and is guided by four side wheels 13 which are in contact with the outsides of the flange portions 9 and 9.

In this embodiment, a linear pulse motor is used as a front-back actuator for moving and positioning the moving positioning member 15 in the front-rear direction.

A, B, C, D are provided at the center of the moving positioning member 15.
The linear motor has four pole teeth 17 and a fixed gap is maintained between the fixed small teeth 7 and the pole teeth 17.

In the mover of the above-mentioned linear motor, the pole teeth of A and C are magnetized to, for example, the N pole of a permanent magnet, and at the same time, the coils wound in series on the same core are excited in a pulse-wise opposite manner. The pole teeth of B and D are magnetized in the same manner as in A and C except that they are magnetized to the S pole by a permanent magnet.

Furthermore, for example, the phase difference between A and B and C and D pole teeth is 1/4.
It is known that if it is provided at P and is electromagnetically excited by a two-phase pulse, a minute step up to 1 / 8P can be accurately obtained.

The above-mentioned movement positioning member 15 is provided with a Z-shaped plate-like arm composed of a horizontal portion 19, a vertical portion 21, and a second horizontal portion 23 protruding from both wings parallel to the machining center line 25. The bracket 5 has a top cover 27 and a bottom cover 29 divided into two parts.
And the movement positioning member 15 are covered.

An encoder 31 is attached to one side of the horizontal portion 19, and a pinion 33 provided on a main shaft of the rotation is engaged with a rack 35 provided on a part of the bracket 5.

Further, a flexible cable trough 37 is provided on the other side, and all cables are pulled out to the outside through a lower surface cover described later through a grommet.

As is clear from FIGS. 3, 4, 5 and 6, the upper surface cover 27 is supported horizontally by a short column 39 which is provided at a higher position in the center of the bracket 5 shown in FIGS. As shown in FIG. 5, the plate-shaped arm approaches the upper end of the vertical portion 21 in a flange shape.

The other lower surface cover 29 is fixed to the outside of the flange portion 9 of the bracket 5 as shown in FIG. 2, and the left and right lower surface covers 29 are formed at the same height position as the flange-shaped portion of the upper surface cover 27 described above. It is provided horizontally inside the vertical portion 21 of the arm.

That is, an opening groove portion 41 through which the vertical portion 21 penetrates is provided between the upper surface cover 27 and the lower surface cover 29.

On the upper surface of the opening groove portion 41, an annular belt 43 that shields a portion where the vertical portion 21 does not exist is attached to both front and rear surfaces of the vertical portion 21 via L-shaped washers 45. Reference numeral 43 is a pulley 47 provided on the bracket 5 in the vicinity of the front and rear ends of the opening groove portion 41 so as to cover the entire length of the opening groove portion 41 and move upward so as to be retrogradeable.

FIG. 6 shows an embodiment in which the encoder 31 shown in FIG. 2 is provided on the shaft of one pulley 47. In this embodiment, a slipless timing belt is desirable for the annular belt 43.

As shown in FIGS. 1 and 2, an elevating and lowering positioning device 51 for vertically positioning the stretch 49 by a drive source such as a servo motor is provided at the outer end of the second horizontal portion 23 of the plate-like arm. At 49, a stopper 53 that abuts the rear end of the workpiece is provided so as to be swingable upward from the horizontal state.

[Effects of the Invention] As will be understood from the above description of the embodiments, in short, the present invention is a dustproof device for a back gauge of a press machine, and is used for moving the moving positioning member 15 in the back gauge 1 back and forth. Bracket 5 supporting actuator
Is extended in the front-rear direction, a cover 27 covering the front-rear actuating device is supported by the bracket 5, and the movable positioning member 1 is moved back and forth by the front-rear operating device.
A stopper 5 for positioning a work piece on the movable positioning member 15 is provided with a front-rear opening groove portion 41 in the front-rear direction for projecting a part of No. 5 out of the cover 27.
3, a pulley 47 rotatably supported by the bracket 5 near both ends of the opening groove 41.
Further, the opening groove portion 41 is provided around the annular belt 43 which can be closed, and the annular belt 43 and the movement positioning member 15 are connected to each other.

As is apparent from the above-mentioned configuration, in the present invention, the part of the front-rear actuating device for moving back and forth the moving positioning member 15 having the stopper 53 for positioning the machine is covered by the cover 27, and The opening / closing groove 41 in the front-rear direction for allowing a part of the movement positioning member 15 to protrude to the outside of the cover 27 is blocked by an annular belt 43, and the annular belt 43 is connected to the movement positioning member 15. is there.

Therefore, according to the present invention, when the movement positioning member 15 is moved back and forth, the annular belt 43 is also moved in association with the movement positioning member 15 so that the opening groove portion 41 protruding outward from the cover 27 is always closed. Therefore, it is possible to surely prevent dust from the front and rear actuating devices.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a plan view of FIG.
II-II sectional arrow view, FIG. 3 is an enlarged plan view of the annular belt of FIG. 1, FIG. 4 is an elevation of FIG. 3, and FIG. 5 is V of FIG.
-V cross-section arrow view, FIG. 6 is another embodiment view of encoder installation, FIG. 7 is a perspective view of a press brake for explaining a conventional back gauge, and FIG. 8 is an opening without a conventional dustproof device. FIG. 9 is a cross-sectional view of a conventional incomplete opening part dustproof device. DESCRIPTION OF SYMBOLS 1 ... Back gauge, 5 ... Bracket 15 ... Moving positioning member, 19 ... Horizontal part 21 ... Vertical part, 23 ... 2nd horizontal part 27 ... Upper surface cover, 29 ... Lower surface cover 41 ... Opening groove part, 43 ... Annular belt 47 ... Pulley

Claims (1)

[Scope of utility model registration request] 1. A back positioning gauge (1) for a back gauge (1) of a backing gauge (1) of a press machine.
5) A bracket (5) supporting a front-rear actuator for moving back and forth is provided extending in the front-rear direction, and a cover (27) for covering the front-rear actuator is supported by the bracket (5). A part of the movement positioning member (15) that is moved back and forth by a front-back actuator is installed in the cover (2).
7) An opening groove (4) in the front-rear direction for projecting outward.
1) is provided in the front-back direction, and the moving positioning member (15)
A pulley (4) rotatably supported by the bracket (5) near both ends of the opening groove (41) is provided with a stopper (53) for positioning the machine
7), the opening groove portion 41 is provided with an annular belt 43 that can be closed, and the annular belt 43 and the movement positioning member 15 are connected to each other. Back gauge dustproof device for press machines.