JP2011143438A - Inversion return operation press apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inversion return operation press apparatus which instantaneously returns a press ram upon the completion of a continuously repeated unit operation, and enables the operation efficiency thereof to be improved in accordance with the operation capacity of an operator, and which can apply an always constant press pressure even to a workpiece with nonconstant thickness. <P>SOLUTION: An input clutch 10 is interposed between a driving motor 1A and a transmission 20, further, an output clutch 30 is interposed between the transmission 20 and a crank mechanism 40 driving the press ram 4C, and a force accumulation type reversal mechanism 60 is attached to the crank mechanism 40. Upon the completion of the operation, the input clutch 10 is declutched and the force accumulation type reversal mechanism 60 reverses the crank mechanism 40 to instantaneously return the press ram 4C. The output clutch 30 keeps press pressure constant by a slipping operation. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention is characterized by a reversing operation in which the lowered press ram is pulled up to a lowering operation start position by reversing the crank mechanism, and versatility and flexibility that can cope with various work contents. The present invention relates to a reverse return operation press apparatus that can be widely used for work belonging to a load.

  The press work is a typical work widely used throughout various industrial fields. Further, a general-purpose press is rarely used for a press device used for mass production of a specific product, and a press device specialized in function so as to be suitable for production of the specific product is used. Therefore, the size and type of the press apparatus are very diverse.

  However, the basic mechanism and the operating mechanism of the press device itself are almost the same, even if the press device has a special appearance by being specialized functions so that it can be particularly adapted to specific work applications. Therefore, the essential functional limit of the press device is not exceeded, but only an attached device or an attached function that is convenient for a specific work is added to the basic mechanism.

  The basic operation mechanism of the conventional press device is to store the energy of the drive motor as flywheel inertia, and transmit the stored energy to the crank mechanism or cam mechanism via the power intermittent element operated by the operator, This is a system that drives the press ram back and forth.

  Some common problems resulting from the operation mechanism of the conventional press device are as follows: (1) The stroke of the press ram cannot be freely changed. This is because the stroke of the press ram is uniquely determined by the stroke of the crank mechanism or cam mechanism that converts the rotational motion into the reciprocating linear motion of the press ram. Due to this problem, for example, the operator is required to perform a nervous work that is always strictly aware of the bottom dead center of the press ram in the work setup such as positioning of the die and punch. Ideally, it is desirable that a pressing operation with a predetermined pressing pressure can be performed no matter where the die or punch is installed in the press ram.

  (2) Since the vertical reciprocating motion cycle of the press ram is constant, the work efficiency is limited by the reciprocating motion cycle of the press, and it is difficult to shorten the working time. This is because the drive motor for driving the crank mechanism or the like is operated at a constant speed, and the reciprocating motion of the press ram has a one-to-one correspondence with the crank mechanism. Ideally, in order to improve work efficiency, it is desirable to immediately return to the lowering start position without waiting for the press ram to reach the bottom dead center when the unit work is completed by the press device.

  (3) There is a problem that, except for the punching work, it is not possible to perform the pressurizing work by sequentially flowing a workpiece having an irregular thickness. This is also a problem in the mechanism of the conventional press apparatus in which it is not possible to shift to the return operation without passing through the bottom dead center. For this reason, the setup of the press work such as the mounting of the die is performed based on the thickness of the workpiece with reference to the bottom dead center. As a result, when the thickness of the workpiece is irregular, excessive pressurization and insufficient pressurization occur, respectively.

  The above-mentioned problems in the conventional press apparatus are inevitably associated with the basic structure and operation mechanism of the press apparatus, and are not particularly problems of the disadvantage. However, in the case of an inevitable structure problem, it means that it is difficult to solve unless the basic structure is changed.

  The present invention replaces the flywheel used as a power storage element for enabling the work exceeding the capacity of the drive motor in the conventional press device, and it can be reversed very easily with no inertia. The basic concept of combining a clutch on the input side and output side of this transmission with a transmission that can be used as an issue is to solve the above-mentioned problems pointed out for conventional press devices, and as a result, the bottom dead center of the press ram It is possible to easily set up the work regardless of the situation, and it is possible to improve the work efficiency according to the work ability of the operator by returning the press ram immediately upon completion of the unit work that is repeated continuously. Moreover, for work where workpieces with different thicknesses are supplied in sequence You can have, and to provide an inverted return operation press apparatus that can apply a constant pressing pressure which is previously set in each work.

  The present invention adopts the following configuration as means for achieving the above object.

(Solution 1)
The reverse recovery operation press device of the present invention performs a reciprocating linear motion by a crank motor that is driven through the transmission, a drive motor that rotates constantly, a transmission that arbitrarily converts the rotational speed and torque of the drive motor, and a crank mechanism. A press ram, an accumulator type reversing mechanism that reversely drives the crank mechanism, an input clutch that is interposed between the drive motor and the transmission, and an output clutch that is interposed between the transmission and the crank mechanism. The input clutch is configured as an optional intermittent clutch that manually performs transmission torque intermittent operation, and the output clutch is configured as a torque limiter clutch that presets the upper limit value of the transmission torque in accordance with the work content, The accumulator type reversing mechanism is driven by an input clutch. And accumulating the energy of the data, the input clutch is characterized by returning the press ram by inverting a transmission and a crank mechanism and at the same time are sectional operated lowering operation start position.

  The above configuration will be described. The constantly rotating drive motor means that the motor is used with the power on without performing ON-OFF control. The transmission is a transmission, but does not include the case where the speed is increased. The crank mechanism is a mechanism for converting a rotational motion and a reciprocating linear motion. Here, the crank mechanism refers to a mechanism that converts a rotational motion into a reciprocating linear motion. The press ram is a component of a press device that reciprocates linearly by a crank mechanism, and is a member that directly or indirectly attaches an upper blade or upper die for press work. The energy accumulation type reversing mechanism is a mechanism that performs specific work by releasing energy accumulated in an energy accumulation element such as a spring or rubber, specifically, a mechanism that reversely drives a transmission and a crank mechanism. The input clutch only needs to be able to intermittently transmit power between the drive motor and the transmission regardless of the type. Further, the output clutch only needs to function as a torque limiter that reliably transmits torque that is equal to or lower than the upper limit value of the set transmission torque regardless of the type and that functions as a slipping operation with torque equal to or higher than the upper limit value.

  The operational feature of the above invention is that the power of the drive motor is transmitted to the crank mechanism via the input clutch, the transmission and the output clutch to lower the press ram, and at this time, a part of the power of the drive motor is stored. Power is stored in the reversing mechanism and the power transmission path from the drive motor to the crank mechanism is disconnected by disengaging the input clutch. At the same time, the energy stored in the reversing mechanism is released, and the transmission and crank The mechanism is reversed to immediately return the press ram to the descent operation start position. Such an operation is made possible by using a transmission with a small inertia instead of the conventional flywheel as a means for obtaining a required press pressure.

(Solution 2)
The reverse recovery operation pressing device of the present invention is based on the invention described in Solution 1, and the transmission is a combination of at least an input gear and an output gear, or a combination of a plurality of gears including an input gear and an output gear. And a drive pulley attached to an output shaft of a drive motor mounted on a swing motor base, wherein an input clutch interposed between the drive motor and the transmission has a driven pulley attached to the input gear. And a transmission belt wound around the drive pulley and the driven pulley. The input clutch is an intermittent operation of the power by changing the tension of the transmission belt by the operator swinging the drive motor via the operating means interlocking with the swing motor base to change the distance between the driven pulley and the drive pulley. It is characterized by doing.

  The above configuration will be described. The above configuration exemplifies a preferable configuration of the transmission with a small inertia and a preferable configuration of the input clutch. A transmission composed of a gear train means a reduction gear train that increases torque by reducing the rotational speed of a drive motor. The input clutch according to the present invention is very special, and includes a driving pulley, a transmission belt, and a driven pulley as clutch elements.

  The operational feature of the invention is that the distance between the drive pulley and the driven pulley as the clutch element is variable, and the power is interrupted by changing the tension of the transmission belt. In other words, by constructing the clutch by skillfully using the mechanical elements of the transmission system, there is a great advantage that a dedicated clutch element can be omitted.

(Solution 3)
The reverse return operation pressing device of the present invention is based on the invention described in Solution 1 or Solution 2, and the transmission includes a combination of at least an input gear and an output gear, or a plurality of input gears and output gears. The output clutch interposed between the transmission and the crank mechanism is provided with a friction member whose pressing pressure is adjustable via a compression spring on the clutch hub, and the friction member. Is pressed against the side surface of the output gear to transmit power from the output gear to the crank mechanism.

  The above configuration will be described. A transmission including a gear train can obtain a free reduction ratio according to the number of gear combination stages, and can reliably transmit power. The present invention is characterized by transmission of power from the output gear to the output clutch rather than this. In other words, the transmission of power during this time is performed by directly pressing the friction member of the output clutch against the output gear constituting the transmission. As a result, the configuration of the output clutch can be a simple structure using the elements of the transmission.

(Solution 4)
The reversing / returning operation pressing device according to the present invention is based on any one of the solutions 1 to 3, and the accumulating reversing mechanism includes a tension spring and a winding pulley that winds the tension spring. The take-up pulley winds the tension spring in synchronism with the descending operation of the press ram, and the wound tension spring reverses the crank mechanism at the same time that the input clutch is disengaged, thereby pressing the press ram. Is returned to the descent operation start position.

  The above configuration will be described. The said structure has shown the preferable structural example of the accumulation type inversion mechanism at the time of utilizing a tension spring as an accumulation means. The accumulator-type reversing mechanism stores energy in the tension spring by winding the tension spring with the take-up pulley in synchronization with the descending operation of the press ram of the crank mechanism, and returns the stored energy to the position where the press ram descends. It is an example used to make it. The tension spring is used because the operation is stable and the usage pattern is simple. However, a similar function can be exhibited using rubber or a compression spring.

(Solution 5)
A reverse return operation pressing device according to the present invention includes a stopper mechanism that restricts the operating angle range of the crank mechanism to an arbitrary range within 360 degrees based on any one of the inventions described in Solution 1 to Solution 4. In this case, the output clutch dampens the operation impact of the stopper mechanism by the sliding operation, and updates the use range of the transmission gear train by the number of teeth corresponding to the sliding operation amount in accordance with the sliding operation. To do.

  The above configuration will be described. The operation angle range of the crank mechanism is limited to an arbitrary angle within 360 degrees, for example, the operation angle range is limited to 180 degrees by which the maximum stroke of the crank mechanism can be obtained by the stopper mechanism, and the reversing operation unique to the present invention is executed. In some cases, two problems arise. And the said structure is comprised as a solution of these two problems. Specifically, there is a problem of impact when the operating crank mechanism is instantaneously stopped by the stopper mechanism. Further, when the forward rotation and the reverse rotation are repeated within a certain operating angle range, the use range of the gears of the transmission gear train is limited, so that the wear and tear of the gears during long-term use becomes a problem. Therefore, in the above-described configuration, the output clutch absorbs the operation impact of the stopper mechanism by the sliding operation and updates the range of use of the transmission gear train by the number of teeth corresponding to the sliding operation amount in accordance with the sliding operation. The problem is solved.

  The reversing / returning operation pressing device of the present invention includes an input clutch interposed between a drive motor and a transmission that amplifies the torque of the drive motor, and an output clutch between the transmission and a crank mechanism that drives the press ram. In addition, it is equipped with a power accumulation type reversing mechanism that reverses the crank mechanism. Can be restored immediately without going through, the problem that the work efficiency is limited by the reciprocating motion cycle of the press can be completely solved, and the output clutch is configured as a torque limiter clutch, Maintains constant press pressure by sliding motion regardless of workpiece thickness change Since it is Rukoto, a problem that can not be thick to work under pressure sequentially steers irregular work also solved.

It is a perspective view which shows embodiment of the reverse return operation | movement press apparatus of this invention. It is operation | movement explanatory drawing of the input clutch in the said embodiment. It is a disassembled perspective view of the principal part in the said embodiment. It is operation | movement explanatory drawing of the stopper mechanism in the said embodiment. It is a disassembled perspective view of the output clutch in the said embodiment. It is a top view of the principal part in the said embodiment.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a reversing / returning operation press apparatus according to the present invention will be described below with reference to the drawings. Note that the reversing / returning operation press apparatus can be implemented as having an arbitrary machine scale while maintaining the same technical idea. Below, the form in the case of implementing as a small apparatus of a light work use is demonstrated.

  The reversing / returning operation pressing apparatus is constructed by assembling the input clutch 10, the transmission 20, the output clutch 30, the crank mechanism 40, the stopper mechanism 50, and the energy accumulation type reversing mechanism 60 on a frame of a steel plate welded structure (FIG. 1).

  The frame in the small reversing / returning operation press apparatus can have a very simple configuration. For example, it is the structure which added the work stand F4 according to the need of work content to the basic form which stood the upright frame F1 on the base plate F2 for installation. The components in the reversing / returning operation press apparatus are arranged so as to be distributed in a balanced manner on the left and right sides of the upright frame F1 by using the swing shaft X1, the input shaft X2, and the crankshaft X3 provided laterally on the upright frame F1. Yes.

  On one side of the upright frame F1, there is formed a transmission 20 having the simplest configuration comprising meshing of an input gear 2A fixed to the input shaft X2 and an output gear 2B attached to the crankshaft X3. The output gear 2B is attached to the crankshaft X3 so as to run idle via a bearing. That is, the output gear 2B does not directly drive the crankshaft X3.

  The input clutch 10 is assembled on the opposite side of the upright frame F1. The input clutch 10 has a drive pulley 1E that is fixed to the output shaft of the drive motor 1A, a driven pulley 1F that is fixed to the shaft end of the input shaft X2, and a transmission that is wound around the drive pulley 1E and the driven pulley 1F. The belt 1G is configured as a main member. The transmission belt 1G is not a toothed timing belt but a flat belt.

  The drive motor 1A is mounted on a swing motor base 1B attached to the swing shaft X1 so as to be swingable, specifically swingable. The swing motor base 1B is connected to an operator operating means provided on the base plate F2 via the pull rod 1C, specifically, a foot pedal 1D, and swings when the operator operates the foot pedal 1D. The drive motor 1A itself can be swung around the axis X1 (FIG. 2).

  The input clutch 10 is responsible for the function of interrupting the power transmission path from the drive motor 1A to the input gear 2A via the driven pulley 1E and the input shaft X2. When the operator depresses the foot pedal 1D as described above (arrow K1 in FIG. 2A), the drive motor 1A rotates in the direction of the arrow K2. If the transmission belt 1G is loosened before the foot pedal 1D is operated and the transmission of power is interrupted, the driving belt 1G is tensioned by the rotation of the driving motor 1A, and the driving pulley 1E The power is transmitted to the driven pulley 1F (FIG. 2B). That is, the input clutch 10 is a system that performs power interruption using the tension change of the transmission belt 1G.

  The crank mechanism 40 is connected to the output gear 2B of the transmission 20 via the output clutch 30 (FIG. 1). The crank mechanism 40 includes a crankshaft X3, a crank disk 4A, a crank arm 4B having one end connected to an eccentric position of the crank disk 4A, and a press ram 4C. The press ram 4C is supported by a guide frame F3 projecting from the upright frame F1 on the work table F4 so as to be movable up and down, and can convert the rotational motion of the crankshaft X3 into the reciprocating linear motion of the press ram 4C.

  The output clutch 30 interposed between the transmission 20 and the crank mechanism 40 is fixed to the crankshaft X3, and is fixed to the fixed clutch hub 3A so as to be slidable along the direction of the crankshaft X3. The movable clutch hub 3B and the friction member 3C are configured as main members (FIG. 5).

  Four guide rods 31 project from one end face of the fixed clutch hub 3A, and guide holes 33 for receiving the four guide rods 31 are provided in the movable clutch hub 3B. . The movable clutch hub 3B is assembled to the fixed clutch hub 3A by loading clutch springs 32 around the four guide rods 31 (FIGS. 5 and 6). It should be noted that four adjusting bolts 34, each having a lock nut 35, are screwed into one end face of the movable clutch hub 3B with the tip protruding.

  The friction member 3C is a disk-like member lined with a friction pad 36 that does not disperse harmful dust or the like on one side, and corresponds to the tip of the four adjustment bolts 34 on the surface facing the movable clutch hub 3B. Recesses 37 are provided. The friction member 3C is assembled in a state in which the friction pad 36 faces the side surface of the output gear 2B and is always urged so as to be pressed against the output gear 2B by the movable clutch hub 3B via the four adjustment bolts 34. (FIG. 6). Therefore, the torque of the output gear 2B is transmitted to the fixed clutch hub 3A via the friction member 3C and the movable clutch hub 3B, and is transmitted from the fixed clutch hub 3A to the crankshaft X3.

  On the opposite side of the crankshaft X3 across the upright frame, there is a stopper mechanism 50 that regulates the operating angle range of the crank mechanism 40, and a power accumulation type reversal that can reversely drive the crank mechanism 40 without requiring a dedicated drive motor. A mechanism 60 is assembled.

  The stopper mechanism 50 includes a combination of a fixed notch disk 5A fixed to the upright frame F1 and a movable notch disk 5B fixed to the crankshaft X3 (FIG. 3). The fixed notch disk 5A is formed with two abutment surfaces 51 each having a buffering dump member 52 attached thereto so as to define a predetermined operating angle range A1 around the crankshaft X3 (see FIG. 3, FIG. 4). On the other hand, an abutting key 53 that is allowed to move only within the operating angle range A1 of the fixed notch disk 5A around the crankshaft X3 is projected from the movable notch disk 5B. As a result of the combination of both, the movement range of the crankshaft X3 is limited within the substantially operating angle range A1.

The accumulator type reversing mechanism 60 has a simple structure including a tension spring 6C and a winding pulley 6A that winds the tension spring 6C. The winding pulley 6A is fixed to the crankshaft X, and both ends of the tension spring 6C are connected to the winding pulley 6A and the upright frame F1, respectively. A flat belt 6B is connected to the tension spring 6C, and the take-up pulley 6A has a structure in which the tension spring 6C is pulled by winding up the portion of the flat belt 6B (FIGS. 1 and 3).

A1 Operating angle range 10 Input clutch 1A Drive motor 1B Swing motor base 1E Drive pulley 1F Driven pulley 1G Drive belt 20 Transmission 2A Input gear 2B Output gear 30 Output clutch 3A Fixed clutch hub 3B Movable clutch hub 3C Friction member 32 Compression Spring 40 Crank mechanism 4C Press ram 50 Stopper mechanism 60 Accumulated reversing mechanism 6A Winding pulley 6C Tension spring

Claims (5)

A drive motor that rotates constantly, a transmission that arbitrarily converts the rotational speed and torque of the drive motor, a crank mechanism that is driven via the transmission, a press ram that reciprocates linearly by the crank mechanism, and the crank mechanism A power accumulation type reversing mechanism for reversing drive, an input clutch interposed between the drive motor and the transmission, and an output clutch interposed between the transmission and the crank mechanism,
The input clutch is configured as an arbitrary type of intermittent clutch that manually performs transmission torque intermittent operation, and the output clutch is configured as a torque limiter clutch that presets an upper limit value of the transmission torque in accordance with work contents. The power accumulation type reversing mechanism accumulates the energy of the drive motor via the input clutch, and simultaneously starts the lowering operation of the press ram by reversing the transmission and the crank mechanism when the input clutch is disengaged. A reversing / returning operation pressing device characterized by returning to a position. The transmission is a transmission composed of a gear train in which a combination of at least an input gear and an output gear, or a combination of a plurality of gears including an input gear and an output gear,
The input clutch interposed between the drive motor and the transmission includes a driven pulley attached to the input gear, a drive pulley attached to an output shaft of the drive motor mounted on a swing motor base, the drive pulley, A transmission belt wound around between the driven pulleys,
The input clutch is transmitted by a change in tension of the transmission belt by an operator changing the distance between the driven pulley and the drive pulley by swinging the drive motor via an operating means interlocking with the swing motor base. The reversing / returning operation press device according to claim 1, wherein the torque is intermittently operated. The transmission is a transmission composed of a gear train in which a combination of at least an input gear and an output gear, or a combination of a plurality of gears including an input gear and an output gear,
The output clutch interposed between the transmission and the crank mechanism is provided with a friction member capable of adjusting a pressing pressure via a compression spring in a clutch hub, and the friction member is pressed against a side surface of the output gear to output the output. 3. A reverse recovery operation pressing apparatus according to claim 1, wherein torque is transmitted from a gear to the crank mechanism. The accumulator-type reversing mechanism includes a tension spring and a winding pulley that winds the tension spring, and the winding pulley winds the tension spring and winds the tension spring in synchronization with the descending operation of the press ram. 4. The tension spring according to any one of claims 1 to 3, wherein the tension spring reverses the crank mechanism at the same time when the input clutch is disengaged to return the press ram to the descent operation start position. The reversing / returning operation press device described in 1. A stopper mechanism for restricting an operating angle range of the crank mechanism to an arbitrary range within 360 degrees, and the output clutch cushions an operating impact of the stopper mechanism by a sliding operation, and transmits the transmission according to the sliding operation. 5. The reversing / returning operation press device according to claim 1, wherein the use range of the gear train is updated by the number of teeth corresponding to the amount of sliding operation. 6.

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