MXPA00009720A - Sudden braking apparatus for press - Google Patents

Abstract

The present invention relates to a sudden braking apparatus of a press, on a press which comprises a flywheel (5) and a small gear (9) combined through the medium of a pulley and a belt of driving motor mounted on a rotational axis (3) installed horizontally to a supporting frame, a slide-block (12) and a large gear mounted on the crankshaft which is set up under the rotational axis (3) and, in addition, a small gear (9) and large gear engaged with each other so that the large gear (10) rotates with the rotatory force transmitted through the flywheel (5) and then makes the slide-block (12) elevate up and down, which is characterized in that the apparatus comprises a circular guide (19) set up to the crankshaft (11b) and having a lining (16), a radial toothed gear (18) and a groove (15) taperingly formed along the side of the circumference in the central part of the body;a clutch plate (22) having a radial toothed gear matching the radial toothed gear (18) fixed to a large gear (10);and a fork (24) having one pair of rollers installed on the end parts of both sides of the body for free rotation and installed to the supporting frame (2) in order to enable the fork (24) to shift on the circular guide (19) connected to a cylinder (23) through an operating rod (26), in such a way that the operation of the cylinder (23) enables the up and down motion of the slide-block (12) to be braked suddenly by transferring the fork (24).

Description

SUCTION BRAKING DEVICE FOR PRESS FIELD OF THE INVENTION The present invention relates to a mechanical press, in particular to a sudden braking apparatus for the mechanical press, to prevent accidents during the operation of the press thereby making it possible to instantly stop the operation of the press.

BACKGROUND OF THE INVENTION In general, a press is typically a dangerous machine that causes industrial accidents in the field of manufacturing. Even though the number of industrial accidents is currently decreasing, the rate of accidents due to presses is not decreasing, and therefore a countermeasure is required to correct this problem. In addition, since the usual presses are for the most part of the clutch-pin types, even if circumstances occur such as that of placing the operator's finger in the press mold, due to lack of care on the part of the operator. operator, you can not suddenly stop the operation of a usual press. A press is well known which is composed of a pneumatic clutch which makes it possible for the press to stop instantly, using a sensor such as an infrared beam switch, to avoid the above problem in case of such dangerous situations. However, since the price of such a press is high, it is difficult for small-scale manufacturing companies to buy it. On the other hand, the basic structure of the pneumatic clutch part is so complex that it has many parts that need to be remodeled when the pneumatic clutch is provided to the press. Even more, given that the price of the pneumatic clutch is high, if you want to convert the usual model into a new one that has the pneumatic clutch, that should be done by specialized personnel. Therefore, due to the financial losses caused by the downtime used in the conversion and the high cost incurred by the conversion, the usual press is still used and the danger of accidents is tolerated.

BRIEF DESCRIPTION OF THE INVENTION The present invention is presented to solve the aforementioned problem, and an object of the present invention is to provide a sudden braking apparatus in which a braking system disposed in the crankshaft of the press is used, by means of which instantly stop the operation of the sliding block, thus preventing accidents to the operator, reducing manufacturing costs and achieving easy conversion, as well as a quick start-up, because it is controlled directly and not through a large cog . In order to achieve the aforementioned object, the present invention comprises a circular guide arrangement for the crankshaft and having a brake lining on the side of the press frame, a sprocket radially on the other side and a groove formed of so that it narrows along the side of the circumference in the central part of the body of the guide; a clutch plate having a radially toothed wheel meshing with the radial sprocket fixed to a large sprocket; and a fork having a pair of rollers installed in the end portions of both ends of the fork for free rotation and installed in the support frame in order to allow the fork to move to the circular guide using a hydraulic cylinder through a operating rod. In this way, the circular guide can then be displaced, which makes it possible to suddenly stop the up and down movement of the slide block.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional contour view showing a sudden braking apparatus for a press according to the present invention; Figure 2 is a perspective view of the main part, so as to explain the braking principle according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION In the following, the present invention will be explained in detail with reference to the accompanying drawings. As illustrated in FIG. 1, the present invention comprises a support frame 2 fixed vertically to a base 1, in rotation shaft 3 arranged horizontally in the upper part of the support frame 2, a flywheel 5 provided with a pulley 7 mounted on an end part of the axis of rotation 3 and connected to the axis of rotation (not shown) of the drive motor 6 through a pulley 4 and a belt 8. A small gear wheel 9 is mounted on the other end part of the rotating shaft 3 and engaged with a large sprocket 10 described below, so that the torque is transmitted from the flywheel 5 to the large sprocket 10. In addition, a crankshaft, arranged below the axis of rotation , is divided into two parts 11a, 11b, which are of polygonal section and circular section, respectively. The crankshaft 11a, 11b is installed in parallel with the axis of rotation 3 by means of bearings (not shown). On the other hand, the crankshaft 11a, 11b is connected to a cam 14 coupled to a connecting rod-crank 13, which makes it possible to raise the sliding block 12. In the polygonal part 11b of the crankshaft there is a circular guide 19. A along the side of the circumference in the middle part of the surface of the circular guide 19 there is formed a groove 15 so that it narrows, a brake lining 16 is attached to one side of the circular guide 19, and in the other corresponding side thereof is provided radially by the gear 18 by means of attachment such as a bolt 17. In addition, a large gear 20 provided with a clutch plate 22 on which the gear wheel is fixed radially 21 by means of attachment such as a bolt 20 with a shape adapted to the radially disposed sprocket 18 arranged in the circular guide 19, it is arranged to rotate freely in the end part of one side of the crankshaft 11 b, as illustrated in figure 2, and The large sprocket is engaged with the small sprocket 9. On the other hand, a fork 24 is located on the circular guide 19, and the fork 24 moves backward (to the left) and forward (to the right) of according to the drawing action of a hydraulic cylinder mounted on the upper part of the support frame 2. The fork 24 is connected as a body to a running rod 26, whose body 25 has the shape of a horse's hoof, and is arranged vertically with respect to piston rod 29 of the cylinder. On both end parts of the body 25 a pair of rollers 28 are mounted across an axis 27, and the rollers 28 constitute a section of a circular cone shape having the same slope as that of the oblique section of the groove 15. In figure 1 the roller parts (A, A ') are shown in the rotation position of 90 °, in order to present all the parts. Further, in the input portion of the mold of the sudden braking apparatus for the press according to the present invention, there is installed a sensor, such as a photosensor (not shown) to be connected to the cylinder 23 electrically. Accordingly, during the lifting movement of a slide block 12, in case of dangerous situations, such as when a hand is inserted between the mold due to lack of care by the operator, etc., the sensor perceives the situation and it causes the plunger rod 29 to move backwards, by applying the control power to the cylinder 23. As a working fluid, either hydraulic pressure or pneumatic pressure can be used. The operation and the effect according to the present invention are the following. The sudden braking apparatus for the press according to the present invention is characterized in that if the sensor detects a dangerous situation and causes the cylinder to work 23, then the fork 24 makes it possible for the circular guide 19 to move, which artificially prevents the large gear wheel 10 from rotating and, consequently, makes it possible for the operation of the slide block 11 installed in the crankshafts 11a, 11b to be stop quickly. That is, if the press 29 is put into operation, a drive motor 6 then operates and transmits its torque to the flywheel 5 through the belt 8, which makes it possible for the small gear wheel 9 mounted on the shaft of rotation 3 and the large gear wheel 10 engaged with the small gear wheel 9 rotate at the same time. Further, in such conditions, if the cylinder is made to move forward (to the right), by operating a switch, such as a foot switch, installed in the press 29, then the fork 24, when pushed outwardly by the operating rod 26 and the circular guide 19, moves in the direction illustrated in dashed line in fig. 2, that is, in the direction of the large sprocket 10. Accordingly, the rotational force of the grained sprocket 10 is transmitted to the crankshaft 1 1 b, due to the fact that the radial teeth of the wheels 18, 21 they engage with each other and therefore the slide block 12 is moved up and down by means of a cam 14, which makes it possible for it to perform its work. Furthermore, during the operation of the press, if dangerous situations arise, such as when the operator's hand is inserted between the mold, it is due to the sensor that perceives this situation, the required control power is applied to the cylinder 23, the which causes the plunger rod 29 to move backwards. Following this, the fork 24 is pushed in the direction of the support frame 2, which is the direction illustrated in the solid line in fig. 2, through the operating rod 26, which produces the separation of the radial teeth from the wheels 18, 21 and, as a result of the separation, the force of inertia of the flywheel 5 can not be transmitted to the crankshaft. On the other hand, the brake lining 16 mounted on the circular guide 19 adheres to the side wall of the support frame 2, so as to control the rotation of the crankshaft 11 b. As a result, the rotation of the circular guide 19 and the crankshaft can be stopped suddenly. Accordingly, it is possible to suddenly stop the lifting movement of the sliding block 12. Meanwhile, the roller 28 installed in the fork 24, which is moved back and forth by the operating rod 26, comprises a section of a circular cone shape having the same slope as the oblique section of the groove 15 tapering from the circular guide 19, so that it is possible to minimize the abrasion due to the reasoning with the groove 15 in case of forward movement and backward. Therefore, the fork can be moved smoothly, without frictional resistance with the circular guide 19. The present invention can be realized in various ways, without deviating from the spirit or exceeding the scope of the invention. On the other hand, the present invention is not limited to the illustrated and explained mode. All variants that are within the above description and the claims that follow will be included in the scope of the present invention.

Claims (2)

NOVELTY OF THE INVENTION CLAIMS

1. - A sudden braking device for a press that is composed of a flywheel (5) and a small gear wheel (9) combined through a pulley and a belt of a drive motor mounted on a rotating shaft (3) installed horizontally in a supporting frame, a sliding block (12) and a large sprocket mounted on the crankshaft which is arranged under the axis of rotation (3) and, on the other hand, a small sprocket (9) and a wheel large gear teeth meshed with each other, so that the large gear wheel (10) rotates with the rotational force transmitted by means of the flywheel (5) and thus causes the slide block (12) to move up and down, which is characterized in that: the apparatus comprises a circular guide (19) disposed on the crankshaft (1 1 b) and having a brake lining (16), a radially cogwheel (18) and a groove (15) that is narrow, formed along the side of the circumference in the cent ral of the body; a clutch plate (22) having a radial sprocket meshing with the radial sprocket (18) fixed to a large sprocket (10); and movement means, which make it possible for the circular guide (19) to move horizontally, installed in the support frame (2).

2. The sudden braking apparatus according to claim 1, wherein the displacement means have a yoke (24), installed on the circular guide (19) through an operating rod (26) and a cylinder (23). ), which makes it possible to move the operating rod (26). SUMMARY OF THE INVENTION The present invention relates to a sudden braking apparatus for press, on a press comprising a flywheel and a small gear combined through a pulley and a belt of a drive motor mounted on a rotation shaft installed horizontally in a supporting frame, a sliding block and a large sprocket mounted on the crankshaft which is arranged under the axis of rotation and, on the other hand, a small sprocket and a large sprocket meshed with each other, so that the sprocket large rotates with the rotational force transmitted by means of the steering wheel and therefore causes the sliding block to move up and down, which is characterized in that the apparatus comprises a circular guide disposed in the crankshaft and having an inner lining. brake, a radially cogwheel and a narrowing groove, formed along the side of the circumference in the central part of the body; a clutch plate having a radial sprocket meshing with the radial sprocket fixed to a large sprocket; and a fork having a pair of rollers installed in the end portions of both ends of the fork for free rotation and installed in the support frame in order to allow the fork to move in the circular guide connected to the cylinder through a operating rod, in such a way that the operation of the cylinder allows the up and down movement of the sliding block to be suddenly stopped when transferring the fork. KIMS AND LEES / mmr * P00 / 1279F