JP2019134609A - Generation device - Google Patents

Abstract

To provide a generation device which can easily cope with a slide adjustment in a press machine, and which has a fluid pressure cylinder with less deformation, wear or the like of a rod.SOLUTION: In a generation device 10, at the time of lifting-and-lowering operation of a slide 2 which can perform a slide adjustment of a press machine 1, the slide transmits pressure pushing a rod 41 of a fluid pressure cylinder 4 attached to a press body 3 to a generation unit 6 through a fluid circuit 5 as fluid pressure, and rotates a driving portion 61a within the generation unit to generate power. On a pressure receiving side of the rod, a first flange 411 in which a contacting portion 21 formed in the slide pushes from a halfway of lifting of the side to a top dead center J, and a second flange 412 in which the contacting portion pushes from the halfway of lowering of the slide to a bottom dead center K are formed in a place separated in an axis direction. Further, the fluid pressure cylinder is formed so that a piston 46 can move within a range larger than a distance L that is obtained by adding a slide adjustment amount Q and a pushing moving amount d of the rod which the contacting portion pushes and moves the first flange.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power generation apparatus that generates power by effectively using energy associated with a reciprocating motion of a slide in a press machine.

  For example, Patent Document 1 discloses an invention related to a power generation apparatus that generates power by effectively using energy associated with the reciprocating motion of a slide in a press machine for the purpose of protecting the global environment.

  As shown in FIG. 9, the power generation device 100 disclosed in Patent Document 1 includes plates 103 having flat upper ends on both left and right sides of a slide (pressing device) 102 that performs a reciprocating motion of the press machine 101. The press main body 105 includes a fluid pressure cylinder (pressure receiving portion) 104 in which the rod 104a extends downward above the plate 103, and the upper end of the plate 103 is the rod of the fluid pressure cylinder 104 when the slide 102 is lifted. In this invention, the pressure that presses the lower end of 104a is transmitted as fluid pressure to the power generation unit 107 via the fluid circuit (transmission unit) 106, and the turbine in the power generation unit 107 is rotated.

JP 2014-236638 A

  However, the general press machine 101 has a structure in which the slide 102 is moved up and down by a predetermined slide stroke using a crank mechanism or the like, so that it corresponds to the die height (vertical height at the bottom dead center) of the mold to be mounted. A slide adjusting mechanism for adjusting the vertical height at the bottom dead center of the slide 102 is provided. Therefore, when the power generation device 100 is applied to the press machine 101 provided with the slide adjustment mechanism, even when the slide 102 is adjusted from the lowest position to the highest position within the range of the slide adjustment amount, The following measures must be taken to enable the upper end of the plate 103 to press the lower end of the rod 104a of the fluid pressure cylinder 104.

  For example, as shown in FIG. 10A, Measure 1 can be considered in which a moving mechanism that moves the vertical position of the fluid pressure cylinder 104 in conjunction with the adjustment of the vertical height of the slide 102 is installed in the press machine 101. However, the moving mechanism needs to have a complicated structure that can be separated from the slide 102 when the slide 102 moves up and down, and can be connected to the slide 102 only when the slide is adjusted.

  Also, for example, as shown in FIG. 10B, the upper end of the plate 103 extends from the lower end of the rod 104a of the fluid pressure cylinder 104 until the slide 102 is adjusted to the highest position until the slide 102 is adjusted to the highest position. Measure 2 for extending the length of the rod 104a so that it can be continuously pressed is conceivable. However, when the length of the rod 104a is extended, there is a problem that the amount of pressing movement of the rod 104a by the slide 102 increases and the rod 104a is easily deformed or worn.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a power generation device including a fluid pressure cylinder that can easily cope with slide adjustment in a press machine and has little deformation or wear of a rod. And

In order to achieve the above object, a power generator according to the present invention has the following configuration.
(1) The slide presses the rod of the fluid pressure cylinder attached to the press body during the up-and-down movement of the slide that can reciprocate up and down with a predetermined slide stroke and can be adjusted with a predetermined slide adjustment amount. A pressure generating device that transmits a fluid pressure as a fluid pressure to a power generation unit via a fluid circuit, and rotates a drive unit in the power generation unit to generate power,
On the pressure receiving side of the rod, a contact portion formed on the slide presses from the middle of the slide to the top dead center, and the contact portion extends from the middle of the slide to the bottom dead center. The second flange to be pressed is formed at a position spaced apart in the axial direction;
The fluid pressure cylinder has a range larger than a distance obtained by adding the slide adjustment amount and a pressing movement amount of the rod that the contact portion moves by pressing the first flange portion or the second flange portion. The piston connected to is formed to be movable.

  In the present invention, on the pressure receiving side of the rod, the first hook part that the abutting part formed on the slide presses from the middle of the slide up to the top dead center, and the abutting part from the middle of the slide down to the bottom dead center. Since the second flange portion to be pressed is formed at a position spaced apart in the axial direction, the amount of pressing movement of the rod of the hydraulic cylinder accompanying the vertical reciprocation of the slide can be reduced, and deformation or wear of the rod Etc. can be reduced.

  The fluid pressure cylinder has a piston connected to the rod within a range larger than the distance obtained by adding the slide adjustment amount and the amount of movement of the rod that the abutting portion moves by pressing the first collar portion or the second collar portion. Since the vertical position of the bottom dead center of the slide is changed to the highest or lowest position based on the slide adjustment amount, the vertical position of the fluid pressure cylinder is linked to the slide adjustment. There is no need to move it. In addition, the pressing movement amount of the rod that the contact portion moves by pressing the first collar portion is equal to the pressing movement amount of the rod that the contact portion moves by pressing the second collar portion.

  Therefore, according to the present invention, it is possible to provide a power generation apparatus including a fluid pressure cylinder that can easily cope with slide adjustment in a press machine and has little deformation or wear of a rod.

(2) In the power generator described in (1),
The contact portion presses the first collar from the vicinity of the top dead center to the top dead center of the slide, and presses the second collar from the vicinity of the bottom dead center to the bottom dead center of the slide. And

  In the present invention, the contact portion presses the first collar from the vicinity of the top dead center to the top dead center of the slide and the second collar from the vicinity of the bottom dead center of the slide to the bottom dead center. The movement of the rod of the fluid pressure cylinder accompanying the up-and-down reciprocating motion of the cylinder can be limited to a low speed range where the slide moves from the vicinity of the top dead center to the top dead center and a low speed range where the slide moves from the vicinity of the bottom dead center to the bottom dead center. Therefore, the risk of deformation or wear of the rod can be further reduced. Further, when the slide moves in a high speed region, the problem that the fluid in the fluid pressure cylinder hardly follows the movement of the rod can be solved, and stable power generation can be achieved.

(3) In the power generator described in (1) or (2),
The rod is characterized by extending through the case upper end and the case lower end of the fluid pressure cylinder with the same diameter.

  In the present invention, since the rod extends through the case upper end portion and the case lower end portion of the fluid pressure cylinder with the same diameter, the contact portion formed on the slide is provided on the pressure receiving side of the rod. When the rod is moved by pressing the first collar or the second collar, the amount of fluid moving in and out of the terminal port formed at the case front end and the case rear end of the fluid pressure cylinder can be made equal. . Therefore, it is not necessary to provide a buffer tank or the like in the middle of the fluid circuit that connects the fluid pressure cylinder and the power generation unit, and it is not necessary to adjust the amount of fluid that enters and exits the case of the fluid pressure cylinder from the terminal port. Can be achieved.

(4) In the power generator described in (3),
On the opposite pressure receiving side of the rod, a buffer member that operates at the bottom dead center when the slide is adjusted to the lowest position, and a buffer member that operates at the top dead center when the slide is adjusted to the highest position. Of these, one or both of them are provided.

  In the present invention, on the side opposite to the pressure receiving side of the rod, a buffer member that operates at the bottom dead center when the slide is adjusted to the lowest position, and a buffer member that operates at the top dead center when the slide is adjusted to the highest position. Since either or both of the members are provided, the buffer member restricts overrun of the rod of the hydraulic cylinder by inertial force at either or both of bottom dead center and top dead center of the slide. be able to. Therefore, the risk of deformation or wear of the rod can be further reduced.

(5) In the power generation device described in any one of (1) to (4),
The fluid circuit includes a check valve in a flow path that operates to supply fluid discharged from the fluid pressure cylinder to the fluid pressure motor to which the drive unit is connected as the slide moves up. It is characterized by being.

  In the present invention, the fluid circuit is provided with a check valve in the flow path that operates to supply the fluid discharged from the fluid pressure cylinder to the fluid pressure motor to which the drive unit is connected as the slide moves up. Therefore, when the slide is lowered and press working is performed, the power generated by the power generation unit can be stopped without supplying the fluid discharged from the fluid pressure cylinder to the fluid pressure motor to which the drive unit is connected. Therefore, it is possible to generate electric power by utilizing the energy during the ascending operation of the slide that is not used in the press working among the energy accompanying the vertical reciprocation of the slide. As a result, it is possible to generate power more easily by effectively utilizing unused energy for press working without sacrificing the molding capability of the press.

(6) In the power generation apparatus described in any one of (1) to (5),
The fluid pressure cylinders are disposed on both left and right sides of the bolster of the press body below the slide.

  In the present invention, the fluid pressure cylinders are arranged on the left and right sides of the bolster of the press body below the slide, so that interference with the mold mounted on the bolster of the press body can be easily avoided, and the power generation Unnecessary remodeling of the press machine can be reduced to install the device. In addition, maintenance and inspection of the fluid pressure cylinder can be easily performed. Therefore, it is possible to more easily install a power generation device that generates power by effectively using the energy associated with the reciprocating motion of the slide in the press machine.

  ADVANTAGE OF THE INVENTION According to this invention, the electric power generating apparatus provided with the fluid pressure cylinder which can respond easily to the slide adjustment in a press, and has little deformation | transformation or abrasion of a rod can be provided.

It is the schematic showing the electric power generating apparatus which concerns on embodiment of this invention in the state which adjusted the slide of the press to the highest position. The left side of the figure represents a state where the slide has moved to the top dead center, and the right side of the figure represents a state where the slide has moved to the bottom dead center. It is the schematic showing the electric power generating apparatus which concerns on embodiment of this invention in the state which adjusted the slide of the press machine to the lowest position. The left side of the figure represents a state where the slide has moved to the top dead center, and the right side of the figure represents a state where the slide has moved to the bottom dead center. 2 is a cross-sectional view of the fluid pressure cylinder showing how the rod moves up and down as the slide moves up and down, and FIG. 3A is a view when the slide is stopped at the top dead center. FIG. 3 (b) shows a cross-sectional view when the slide is lowered near the bottom dead center, and FIG. 3 (c) shows a cross-section when the slide stops at the bottom dead center. FIG. 3 (d) shows a cross-sectional view when the slide is rising near the top dead center, and FIG. 3 (e) is a cross-sectional view when the slide is stopped at the top dead center. Indicates. FIG. 4 is a cross-sectional view of the fluid pressure cylinder showing how the rod moves up and down as the slide moves up and down in the power generation device shown in FIG. 1, and FIG. 4 (a) is a view when the slide stops at the top dead center. FIG. 4 (b) shows a cross-sectional view when the slide is lowered near the bottom dead center, and FIG. 4 (c) shows a cross-section when the slide stops at the bottom dead center. FIG. 4 (d) shows a cross-sectional view when the slide is rising near the top dead center, and FIG. 4 (e) is a cross-sectional view when the slide stops at the top dead center. Indicates. FIG. 3 is a conceptual diagram showing an operation when the slide rises from near the top dead center to the top dead center in the power generation device shown in FIG. 2. FIG. 3 is a conceptual diagram illustrating an operation when the slide descends from the vicinity of the bottom dead center to the bottom dead center in the power generation device illustrated in FIG. 2. FIG. 6 is a conceptual diagram illustrating an operation when the slide rises from near the top dead center to the top dead center in the modification of the power generation device illustrated in FIG. 2. FIG. 6 is a conceptual diagram illustrating an operation when the slide descends from the vicinity of the bottom dead center to the bottom dead center in the modification of the power generation device illustrated in FIG. 2. 1 is a schematic diagram of a power generation device disclosed in Patent Document 1. FIG. FIGS. 10A and 10B are conceptual diagrams illustrating countermeasures for the power generation apparatus illustrated in FIG. 9, in which FIG. 9A illustrates countermeasure 1 for providing a fluid pressure cylinder moving mechanism, and FIG. .

  Next, a power generator according to an embodiment of the present invention will be described in detail with reference to the drawings. First, the overall structure of the power generator according to the present embodiment will be described, and then the operation method of the power generator will be described.

<Overall structure of the power generator>
First, the overall structure of the power generator according to this embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic diagram illustrating a power generation device according to an embodiment of the present invention in a state where a slide of a press machine is adjusted to the highest position. The left side of the figure represents a state where the slide has moved to the top dead center, and the right side of the figure represents a state where the slide has moved to the bottom dead center. FIG. 2 is a schematic view showing the power generation device according to the embodiment of the present invention in a state where the slide of the press machine is adjusted to the lowest position. The left side of the figure represents a state where the slide has moved to the top dead center, and the right side of the figure represents a state where the slide has moved to the bottom dead center.

  As shown in FIGS. 1 and 2, the power generation apparatus 10 according to the present embodiment performs a reciprocating motion in a vertical direction with a predetermined slide stroke S of the press machine 1 and a slide that can be adjusted with a predetermined slide adjustment amount Q. 2, the pressure at which the slide 2 presses the rod 41 of the fluid pressure cylinder 4 mounted on the press body 3 is transmitted to the power generation unit 6 via the fluid circuit 5 as a fluid pressure, and the drive in the power generation unit 6 is performed. This is a power generation device that generates power by rotating a portion (rotor 61a or stator 61b). Here, an example in which the drive unit is the rotor 61a of the generator 61 will be described. However, the rotor 61a may be fixed and the stator 61b may be rotated. In this case, the drive unit refers to the stator 61b.

  The slide 2 reciprocates up and down with a predetermined slide stroke S by a crank mechanism provided in the press machine 1. The slide stroke S varies depending on the press machine 1, but is about 800 to 1000 mm, for example. The power generation device 10 uses a part of the slide stroke S (for example, from the middle of the rise in the vicinity of the top dead center J of the slide 2 to the top dead center J) by pressing the rod 41 of the fluid pressure cylinder 4. Generate electricity.

  The slide 2 is formed such that the vertical position at the bottom dead center K can be changed within a predetermined slide adjustment amount Q. The slide adjustment is performed when the die is exchanged in order to cope with the difference in die height of the die attached to the press machine 1. The slide adjustment amount Q varies depending on the press machine 1, but is, for example, about 200 to 300 mm. Further, the fluid pressure cylinders 4 are arranged on the left and right sides of the bolster 31 of the press body 3 below the slide 2. The fluid pressure cylinder 4 is arranged so that the pressure receiving side of the rod 41 extends vertically upward via an attachment jig 48.

  Further, on the pressure receiving side of the rod 41 of the fluid pressure cylinder 4, a first flange portion 411 that the contact portion 21 formed on the slide 2 presses from the middle of the slide 2 near the top dead center J to the top dead center J; The second flange 412 where the abutment portion 21 presses from the middle of the slide 2 near the bottom dead center K to the bottom dead center K is formed at a position separated in the axial direction. The contact portion 21 protrudes horizontally from the left and right end portions of the slide 2. The pressing movement amount d (d1, d2) of the rod 41 that the contact part 21 presses and moves the first collar part 411 or the second collar part 412 is a distance between the first collar part 411 and the second collar part 412. It can be changed by adjusting the distance. The pressing movement amount d (d1, d2) of the rod 41 is, for example, about 150 to 250 mm.

  Here, at the upper end of the rod 41 extending upward from the case of the fluid pressure cylinder 4, a first flange 411 is formed at the upper end of the screw-connected extension rod 413, and a second flange 412 is formed at the lower end. . The first flange portion 411 and the second flange portion 412 are formed in a columnar shape with an outer diameter larger than the shaft portion of the extension rod 413. A contact portion 21 of the slide 2 through which the shaft portion of the extension rod 413 is inserted is mounted between the first flange portion 411 and the second flange portion 412 so as to be movable up and down.

  Further, the fluid pressure cylinder 4 is formed such that the piston 46 connected to the rod 41 is movable within a range larger than the distance L obtained by adding the slide adjustment amount Q and the pressing movement amount d of the rod 41. The pressing movement amounts d1 and d2 of the rod 41 are the same. A flow path 53 (53c, 53d) connected to a coupler 59 to which the fluid circuit 5 is detachably connected is connected to the side walls of the case upper end portion 42 and the case lower end portion 43 of the fluid pressure cylinder 4.

  Further, the rod 41 extends in the vertical direction through the case upper end portion 42 and the case lower end portion 43 of the fluid pressure cylinder 4 with the same diameter. Further, on the pressure receiving side (lower end) of the rod 41, a buffer member 44 (for example, a spring member) acting at the bottom dead center K when the slide 2 is slid and adjusted to the lowest position Q1, and the slide 2 is located at the highest position. A buffer member 45 (for example, a spring member) acting at the top dead center J when the slide is adjusted to Q2 is provided. The buffer members 44 and 45 may be either one.

  Further, a third flange 47 having the same diameter as the first flange 411 and the second flange 412 is formed on the opposite pressure receiving side (lower end) of the rod 41. The upper end of the third flange 47 is mounted with a buffer member 45 that acts in contact with the lower end 43 of the case, and the lower end of the third flange 47 is contacted with the base of the mounting jig 48 of the fluid pressure cylinder 4. A shock-absorbing member 44 that acts in contact is mounted. When the buffer members 44 and 45 act, the rod 41 of the fluid pressure cylinder 4 overruns by the inertial force at the bottom dead center K or the top dead center J of the slide 2, and the rod 41 and the piston 46 are deformed and worn. , Damage and the like can be reduced.

  Further, a check valve 52 that operates to supply the fluid discharged from the fluid pressure cylinder 4 as the slide 2 moves upward to the fluid pressure motor 51 connected to the rotor 61a flows in the fluid circuit 5. The road 53 is provided. Specifically, the fluid circuit 5 includes a fluid pressure motor (for example, a hydraulic motor) 51 connected to the power generation unit 6, and fluid discharged from the fluid pressure cylinder 4 as the slide 2 moves up. 51 is provided with a supply flow path 53 a (53) to be supplied to 51 and a return flow path 53 b (53) for returning the fluid supplied to the fluid pressure motor 51 to the fluid pressure cylinder 4.

  Further, in the supply flow path 53a (53), a first check valve 52a (52), a pressure gauge 55, an accumulator 56, and a pressure adjustment for preventing the fluid from flowing back from the fluid pressure motor 51 to the fluid pressure cylinder 4 are provided. A valve 57 and a flow rate adjustment valve 58 are provided, and they are arranged in series. The return flow path 53 b (53) includes a second check valve 52 b (52) that prevents the fluid from flowing backward from the fluid pressure cylinder 4 to the fluid pressure motor 51.

  Further, an upstream portion of the first check valve 52a (52) and a downstream portion of the second check valve 52b (52) are provided between the supply passage 53a (53) and the return passage 53b (53). Is provided. The bypass flow path 54 includes a third check valve 52c (52) that blocks fluid flowing from the supply flow path 53a (53) to the return flow path 53b (53).

  The power generation unit 6 includes a generator 61 that generates power by rotating the rotor 61a in the stator 61b, a clutch / brake unit 63 that controls rotation or stop of the rotor 61a, and a driven shaft of the clutch / brake unit 63. Are connected to each other. The drive shaft of the transmission 62 is connected to the output shaft of the fluid pressure motor 51 of the fluid circuit 5. The power generation unit 6 and the fluid circuit 5 can be installed at a position away from the press machine 1, and the coupler 59 can be attached and detached and connected to another press machine 1.

<Operation method of the power generation device>
Next, the operation | movement method of the electric power generating apparatus 10 which concerns on this embodiment is demonstrated using FIGS. FIG. 3 shows a cross-sectional view of the fluid pressure cylinder showing how the rod moves up and down as the slide moves up and down in the power generator shown in FIG. 2, and FIG. 3 (a) shows the slide stopped at the top dead center. 3 (b) shows a cross-sectional view when the slide is lowered near the bottom dead center, and FIG. 3 (c) shows that the slide is stopped at the bottom dead center. FIG. 3 (d) shows a cross-sectional view when the slide is rising near the top dead center, and FIG. 3 (e) shows a state when the slide is stopped at the top dead center. FIG. FIG. 4 is a cross-sectional view of the hydraulic cylinder showing how the rod moves up and down as the slide moves up and down in the power generator shown in FIG. 1, and FIG. 4 (a) shows the slide stopped at the top dead center. 4 (b) shows a cross-sectional view when the slide is lowered near the bottom dead center, and FIG. 4 (c) shows that the slide is stopped at the bottom dead center. 4 (d) shows a cross-sectional view when the slide is rising near the top dead center, and FIG. 4 (e) shows a state when the slide is stopped at the top dead center. FIG. FIG. 5 is a conceptual diagram showing an operation when the slide rises from near the top dead center to the top dead center in the power generation apparatus shown in FIG. FIG. 6 is a conceptual diagram showing an operation when the slide descends from the vicinity of the bottom dead center to the bottom dead center in the power generation device shown in FIG.

  First, an operation method of the power generation apparatus 10 in a state where the slide 2 of the press machine 1 is adjusted to the lowest position (see FIG. 2) will be described. That is, as shown in FIG. 3A, the slide 2 is stopped at the top dead center J, which is the upper limit of the slide stroke S, with the vertical position of the slide 2 changed downward by the slide adjustment amount Q. At this time, the contact portion 21 of the slide 2 is in contact with the lower end of the first flange portion 411 formed on the pressure receiving side of the rod 41. Further, the piston 46 of the fluid pressure cylinder 4 is at a substantially intermediate position between the case upper end portion 42 and the case lower end portion 43. Further, the buffer members 44 and 45 attached to the lower end and the upper end of the third flange portion 47 formed on the counter pressure receiving side of the rod 41 are formed between the case lower end portion 43 of the fluid pressure cylinder 4 and the base of the mounting jig 48. It is located in the middle part and is not working.

  Next, as shown in FIG. 3B, when the slide 2 descends and reaches the vicinity of the bottom dead center, the contact portion 21 contacts the upper end of the second flange portion 412. Since the contact portion 21 does not press the rod 41 until the contact portion 21 is separated from the lower end of the first flange portion 411 and contacts the upper end of the second flange portion 412, the piston 46 does not move. Therefore, at this stage, the fluid in the fluid pressure cylinder 4 is not supplied to the fluid circuit 5, and the rotor 61a of the power generation unit 6 is not rotated to generate power.

  Next, as shown in FIG. 3C, the abutting portion 21 presses the second collar portion 412 downward until the slide 2 further descends and reaches the bottom dead center K from the vicinity of the bottom dead center K. . At this time, the piston 46 is close to the lower end portion 43 of the case, but the buffer member 44 attached to the lower end of the third flange portion 47 comes into contact with the pedestal of the mounting jig 48 to restrict the overrun of the rod 41. Further, as shown in FIG. 6, the fluid corresponding to the pressing movement amount d <b> 2 of the rod 41 is discharged from the case lower end 43 side of the fluid pressure cylinder 4 toward the return flow path 53 b of the fluid circuit 5. However, the fluid is not supplied to the fluid pressure motor 51 by the second check valve 52b provided in the downstream portion of the return flow path 53b. Therefore, the fluid discharged from the case lower end portion 43 side of the fluid pressure cylinder 4 is supplied to the upstream portion of the supply passage 53 a via the bypass passage 54. Further, the fluid supplied to the upstream portion of the supply flow path 53a is prevented from being supplied to the fluid pressure motor 51 by the first check valve 52a, and returned from the case upper end portion 42 of the fluid pressure cylinder 4 into the cylinder. . Accordingly, even at this stage, the fluid in the fluid pressure cylinder 4 is not supplied to the fluid pressure motor 51 of the fluid circuit 5, and the rotor 61a of the power generation unit 6 is not rotated to generate power.

  Next, as shown in FIG. 3D, when the slide 2 rises from the bottom dead center K and reaches the vicinity of the top dead center J, the contact portion 21 contacts the lower end of the first flange portion 411. Since the contact portion 21 does not press the rod 41 until the contact portion 21 is separated from the upper end of the second flange portion 412 and contacts the upper end of the first flange portion 411, the piston 46 does not move. Therefore, at this stage, the fluid in the fluid pressure cylinder 4 is not supplied to the fluid circuit 5, and the rotor 61a of the power generation unit 6 is not rotated to generate power.

  Next, as shown in FIG. 3 (e), the contact portion 21 presses the first flange 411 upward until the slide 2 further moves up and reaches the top dead center J from the vicinity of the top dead center. At this time, as shown in FIG. 5, the fluid corresponding to the pressing movement amount d <b> 1 of the rod 41 is discharged from the case upper end portion 42 side of the fluid pressure cylinder 4 toward the supply flow path 53 a of the fluid circuit 5. Then, the fluid is supplied to the fluid pressure motor 51 by opening the first check valve 52a provided in the upstream portion of the supply flow path 53a. The fluid supplied to the fluid pressure motor 51 is adjusted to a required fluid pressure and flow velocity by an accumulator 56, a pressure adjustment valve 57, a flow rate adjustment valve 58, and the like disposed in the middle of the supply flow path 53a. And the rotor 61a of the generator 61 is rotated at a predetermined rotational speed and torque via the transmission 62 connected to the output shaft of the fluid pressure motor 51 to generate electric power. The fluid supplied to the fluid pressure motor 51 passes through the second check valve 52b of the return flow path 53b and is returned from the case lower end side 43 of the fluid pressure cylinder 4 into the cylinder.

  Next, an operation method of the power generation apparatus 10 in a state where the slide 2 of the press machine 1 is adjusted to the highest position (see FIG. 1) will be described. That is, as shown in FIG. 4A, the slide 2 is stopped at the top dead center J, which is the upper limit of the slide stroke S, with the vertical position of the slide 2 changed upward by the slide adjustment amount Q. At this time, the contact portion 21 of the slide 2 is in contact with the lower end of the first flange portion 411 formed on the pressure receiving side of the rod 41. Further, the piston 46 of the fluid pressure cylinder 4 is in a position close to the upper end portion 42 of the case, but the buffer member 44 attached to the upper end of the third flange portion 47 formed on the counter pressure receiving side of the rod 41 is fluid pressure. Abutting on the case upper end portion 42 of the cylinder 4, the upward movement of the rod 41 is restricted.

  Next, as shown in FIG. 4B, when the slide 2 descends and reaches the vicinity of the bottom dead center K, the contact portion 21 contacts the upper end of the second collar portion 412. Since the contact portion 21 does not press the rod 41 until the contact portion 21 is separated from the lower end of the first flange portion 411 and contacts the upper end of the second flange portion 412, the piston 46 does not move. Therefore, at this stage, the fluid in the fluid pressure cylinder 4 is not supplied to the fluid circuit 5, and the rotor 61a of the power generation unit 6 is not rotated to generate power.

  Next, as shown in FIG. 4C, the abutting portion 21 presses the second flange portion 412 downward until the slide 2 further descends and reaches the bottom dead center K from the vicinity of the bottom dead center K. . At this time, as in the case shown in FIG. 6, the fluid corresponding to the pressing movement amount d <b> 2 of the rod 41 is discharged from the case lower end 43 side of the fluid pressure cylinder 4 toward the return flow path 53 b of the fluid circuit 5. However, the fluid is not supplied to the fluid pressure motor 51 by the second check valve 52b provided in the downstream portion of the return flow path 53b. Therefore, the fluid in the fluid pressure cylinder 4 is not supplied to the fluid pressure motor 51 of the fluid circuit 5, and the rotor 61a of the power generation unit 6 is not rotated to generate power.

  Next, as shown in FIG. 4D, when the slide 2 rises from the bottom dead center K and reaches the vicinity of the top dead center J, the contact portion 21 contacts the lower end of the first flange portion 411. Since the contact portion 21 does not press the rod 41 until the contact portion 21 is separated from the upper end of the second flange portion 412 and contacts the upper end of the first flange portion 411, the piston 46 does not move. Therefore, at this stage, the fluid in the fluid pressure cylinder 4 is not supplied to the fluid circuit 5, and the rotor 61a of the power generation unit 6 is not rotated to generate power.

  Next, as shown in FIG. 4 (e), the contact portion 21 presses the first flange 411 upward until the slide 2 further moves up and reaches the top dead center J from the vicinity of the top dead center. At this time, the piston 46 is close to the upper end portion 42 of the case, but the buffer member 45 attached to the upper end of the third flange portion 47 abuts on the lower end portion 43 of the case to restrict the overrun of the rod 41. Similarly to the case shown in FIG. 5, the fluid corresponding to the pressing movement amount d <b> 1 of the rod 41 is discharged from the case upper end portion 42 side of the fluid pressure cylinder 4 toward the supply flow path 53 a of the fluid circuit 5. It is supplied to the fluid pressure motor 51. The fluid supplied to the fluid pressure motor 51 generates electricity by rotating the rotor 61a of the generator 61 at a predetermined rotational speed and torque via a transmission 62 connected to the output shaft of the fluid pressure motor 51.

  As described above in detail, whether the slide 2 of the press machine 1 is adjusted to the lowest position (see FIG. 2) or the state where the slide 2 is adjusted to the highest position (see FIG. 1), Electric power can be generated by pressing the rod 41 of the fluid pressure cylinder 4 using a part of the slide stroke S (for example, from the middle of the rise in the vicinity of the top dead center J of the slide 2 to the top dead center J).

<Effect>
Further, according to the power generation devices 10 and 10B according to the present embodiment, the first rod that the contact portion 21 formed on the slide 2 presses from the midway of the slide 2 to the top dead center J on the pressure receiving side of the rod 41. Since the part 411 and the second flange part 412 that the contact part 21 presses from the middle of the lowering of the slide 2 to the bottom dead center K are formed at positions separated from each other in the axial direction, Accordingly, the pressing movement amount d of the rod 41 of the fluid pressure cylinder 4 can be reduced, and the risk of deformation or wear of the rod 41 can be reduced.

  The fluid pressure cylinder 4 is larger than the distance L obtained by adding the slide adjustment amount Q and the pressing movement amount d of the rod 41 that the contact portion 21 presses and moves the first flange portion 411 or the second flange portion 412. Since the piston 46 connected to the rod 41 is movable within the range, the vertical position at the bottom dead center K of the slide 2 is changed to the highest position Q2 or the lowest position Q1 based on the slide adjustment amount Q. However, it is not necessary to move the vertical position of the fluid pressure cylinder 4 in conjunction with the slide adjustment. Note that the pressing movement amount d1 of the rod 41 that the contact portion 21 moves by pressing the first collar portion 411 upward is the amount of the rod 41 that the contact portion 21 moves by pressing the second collar portion 412 downward. It is equal to the pressing movement amount d2.

  Therefore, according to the present embodiment, it is possible to provide the power generators 10 and 10B including the fluid pressure cylinder 4 that can easily cope with the slide adjustment in the press machine 1 and has little deformation or wear of the rod 41.

  Further, according to the present embodiment, the contact portion 21 presses the first flange 411 from the vicinity of the top dead center J of the slide 2 to the top dead center J, and the bottom dead center from the vicinity of the bottom dead center K of the slide 2. Since the second flange 412 is pressed to K, the movement of the rod 41 of the fluid pressure cylinder 4 accompanying the vertical reciprocation of the slide 2 is a low speed region where the slide 2 moves from the vicinity of the top dead center J to the top dead center J. It can be limited to a low speed range that moves from the vicinity of the bottom dead center K to the bottom dead center K. Therefore, the risk of deformation or wear of the rod 41 and the piston 46 can be further reduced. Further, when the slide 2 moves in a high speed region, the problem that the fluid in the fluid pressure cylinder 4 hardly follows the movement of the rod 41 can be solved, and stable power generation can be achieved.

  In addition, according to the present embodiment, the rod 41 extends through the case upper end portion 42 and the case lower end portion 43 of the fluid pressure cylinder 4 with the same diameter, so that the contact portion formed on the slide 2 21 is formed in the case upper end portion 42 and the case lower end portion 43 of the fluid pressure cylinder 4 when the rod 41 is moved by pressing the first flange portion 411 or the second flange portion 412 provided on the pressure receiving side of the rod 41. The amount of movement of the fluid entering and exiting the terminal port can be made equal. Therefore, it is not necessary to provide a buffer tank or the like in the middle of the fluid circuit 5 that connects the fluid pressure cylinder 4 and the power generation unit 6 to adjust the amount of fluid entering and exiting the case of the fluid pressure cylinder 4 from the terminal port. The circuit 5 can be simplified.

  Further, according to the present embodiment, on the opposite pressure receiving side of the rod 41, the buffer member 44 that operates at the bottom dead center K when the slide 2 is slid and adjusted to the lowest position Q1, and the slide 2 is slid to the highest position Q2. Since the buffer member 45 acting at the top dead center J when adjusted is provided, the rod 41 of the fluid pressure cylinder 4 overruns by inertial force at both the bottom dead center K or the top dead center J of the slide 2. This can be restricted by the buffer members 44 and 45.

  Further, according to the present embodiment, the fluid circuit 5 is operated so as to supply the fluid discharged from the fluid pressure cylinder 4 to the fluid pressure motor 51 connected to the rotor 61a as the slide 2 moves up. Since the check valve 52 is provided in the flow path 53, the fluid discharged from the fluid pressure cylinder 4 is supplied to the fluid pressure motor 51 to which the rotor 61a is connected when the slide 2 is lowered and pressed. Without generating, the power generation of the power generation unit 6 can be stopped. Therefore, it is possible to generate power by using the energy during the ascending operation of the slide 2 that is not used in the press working among the energy accompanying the vertical reciprocation of the slide 2. As a result, it is possible to generate power more easily by effectively utilizing unused energy for the press work without sacrificing the molding ability of the press machine 1.

  Further, according to the present embodiment, the fluid pressure cylinders 4 are arranged on the left and right sides of the bolster 31 of the press main body 3 below the slide 2, so that the mold mounted on the bolster 31 of the press main body 3 Interference can be easily avoided and unnecessary modification of the press machine 1 for mounting the power generation apparatus 10 can be reduced. In addition, maintenance and inspection of the fluid pressure cylinder can be easily performed. Therefore, it is possible to more easily install the power generation apparatus 10 that generates power by effectively using the energy associated with the reciprocating motion of the slide 2 in the press machine 1.

<Modification>
The embodiment described above can be changed as appropriate without departing from the scope of the present invention. For example, in this embodiment, the fluid circuit 5 is reversely operated so as to supply the fluid discharged from the fluid pressure cylinder 4 to the fluid pressure motor 51 connected to the rotor 61a as the slide 2 moves up. A stop valve 52 is provided in the flow path 53. However, the configuration is not necessarily limited to the above configuration. For example, as shown in FIGS. 7 and 8, the rotor 61 a connects the fluid discharged from the fluid pressure cylinder 4 in both the ascending operation and the descending operation of the slide 2. The bypass passage 54 provided with the third check valve 52c is eliminated so that the fluid pressure motor 51 is supplied, and the passage can be switched in conjunction with the ascending and descending operations of the slide 2. Alternatively, the fluid circuit 5B including the flow path switching device 7 may be changed.

  Specifically, the flow path switching device 7 shown in FIGS. 7 and 8 is provided with three-way switching valves 71 and 72 at the upstream portion of the supply flow path 53a and the downstream portion of the return flow path 53b, respectively. A first branch flow path 74 connected from the three-way switching valve 71 of the flow path 53a to the downstream portion of the return flow path 53b, and a three-way switching valve 72 of the return flow path 53b connected to the upstream portion of the supply flow path 53a. And a second branch channel 73. As shown in FIG. 7, when the slide 2 is lifted, the three-way switching valves 71 and 72 close the output ports to the branch flow paths 73 and 74, and as shown in FIG. During operation, the three-way switching valves 71 and 72 are controlled so that the output ports to the branch flow paths 73 and 74 are opened. According to the power generation device 10 </ b> B changed to the fluid circuit 5 </ b> B including the flow path switching device 7, more power can be generated by utilizing the energy associated with the lifting / lowering operation of the slide 2.

  INDUSTRIAL APPLICABILITY The present invention can be used as a power generator that generates power by effectively using energy associated with the reciprocating motion of a slide in a press machine.

1 Press machine 2 Slide 3 Press body 4 Fluid pressure cylinder (hydraulic cylinder)
5, 5B Fluid circuit (hydraulic circuit)
6 Power generation unit 10, 10B Power generation device 21 Contact portion 31 Bolster 41 Rod 42 Case upper end portion 43 Case lower end portion 44, 45 Buffer member 46 Piston 51 Fluid pressure motor (hydraulic motor)
52, 52a, 52b, 52c Check valve 53 Flow path 61a Rotor (drive unit)
411 1st collar 412 2nd collar J Top dead center K Bottom dead center L Distance Q Slide adjustment Q1 Minimum position Q2 Maximum position d1, d2, d Press movement

Claims (6)

The pressure by which the slide presses the rod of the fluid pressure cylinder mounted on the press body during the up-and-down movement of the slide that can reciprocate up and down with a predetermined slide stroke of the press machine and can be adjusted with a predetermined slide adjustment amount. A power generation device that transmits the fluid pressure to a power generation unit via a fluid circuit and generates power by rotating a drive unit in the power generation unit;
On the pressure receiving side of the rod, a contact portion formed on the slide presses from the middle of the slide to the top dead center, and the contact portion extends from the middle of the slide to the bottom dead center. The second flange to be pressed is formed at a position spaced apart in the axial direction;
The fluid pressure cylinder has a range larger than a distance obtained by adding the slide adjustment amount and a pressing movement amount of the rod that the contact portion moves by pressing the first flange portion or the second flange portion. A power generation device, characterized in that a piston connected to is formed to be movable. In the electric power generating apparatus described in Claim 1,
The contact portion presses the first collar from the vicinity of the top dead center to the top dead center of the slide, and presses the second collar from the vicinity of the bottom dead center to the bottom dead center of the slide. A power generator. In the electric power generating apparatus described in Claim 1 or Claim 2,
The rod is extended through the case upper end and the case lower end of the fluid pressure cylinder with the same diameter. In the electric power generating apparatus described in Claim 3,
On the opposite pressure receiving side of the rod, a buffer member that operates at the bottom dead center when the slide is adjusted to the lowest position, and a buffer member that operates at the top dead center when the slide is adjusted to the highest position. One or both of them are provided, The power generator characterized by the above-mentioned. In the electric power generating apparatus described in any one of Claims 1 thru | or 4,
The fluid circuit includes a check valve in a flow path that operates to supply fluid discharged from the fluid pressure cylinder to the fluid pressure motor to which the drive unit is connected as the slide moves up. A power generator characterized by comprising: In the electric power generating apparatus described in any one of Claims 1 thru | or 5,
The power generation device according to claim 1, wherein the fluid pressure cylinders are disposed on both left and right sides of the bolster of the press body below the slide.

Images