JPH06586U - Mechanical press - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] Install a lever that raises and lowers the ram to which the upper die of the press is mounted vertically in the center of the box-shaped machine frame, and use a lever with a large swing range. It is possible to obtain a mechanical press that makes it possible to lower the center of gravity of the machine body and balance the right and left sides. [Structure] A slider bearing 8 is fitted to the lower part of a lever that has a fulcrum shaft 6 on the upper part of a box-shaped body F and hangs in the center.
On both sides of the crank pin 10 which penetrates the slider bearing,
A crankshaft is formed by arranging the flywheel 12 and the shaft symmetrically, and a clutch 15 is attached to one end of the shaft and a brake 18 is attached to the other end.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lever-type mechanical press including a lever for raising and lowering a ram to which an upper die of a press is attached and a crank for swinging the lever.

[0002]

[Prior art]

 In the conventional lever type mechanical press of this type, a partition wall is erected in a machine frame formed in a vertically long box shape, as disclosed in, for example, Japanese Utility Model Publication No. 42-11916 and Japanese Patent Publication No. 54-81574. Bearing the crankshaft underneath the bulkhead, and connecting a crankpin that rotates along one side of the bulkhead to a slider bearing fitted to the base end of a separately-supported lever, and The lever is configured to swing along the side surface, the crankshaft is driven by the gear train installed along the other side surface of the partition wall, and the driving force of the gear train installed above the bulkhead. Both ends of the rotary shaft of the gear were projected out of the machine frame, a clutch was attached to one end of the gear, and a brake reversely operating to the clutch was attached to the other end.

As a mechanical press that is not a lever type, for example, as disclosed in Japanese Patent Publication No. 54-18782, a clutch and a brake are provided on an output shaft driven by a motor, and an outer end of the output shaft is provided. There is also a direct-crank type in which a large gear is rotated via a pinion gear provided in the, and a tool support platen is moved up and down by a crank provided on the rotation shaft of the large gear.

Further, as disclosed in, for example, Japanese Unexamined Patent Publication No. 50-148986, an output shaft equipped with a clutch and a brake at one end is provided horizontally at the center of a box-shaped machine frame, and the other end of the output shaft is provided. There is also one in which a lever is swung through a pinion and a large gear connected to the upper and lower dies of a press.

As a clutch / brake device, for example, there is a device in which a clutch is attached to one end of a crankshaft and a brake is attached to the other end as disclosed in Japanese Utility Model Publication No. 60-2348.

[0006]

[Problems to be solved by the device]

 In each of the conventional lever-type mechanical presses, the swing of the lever is performed by interlocking the gear trains connected to the output shaft, and the clutch break is equipped on one side of the output shaft. However, the swing range of the lever that raises and lowers the ram is limited to a small range, and the strength of the lever itself cannot be increased.

[0007] Furthermore, the arrangement of each device that converts the input from the motor to the elevation of the ram forms an unbalance in the left-right direction, and the center of gravity of the machine body is also biased to the upper part, so the size of the lever and the swing range are divided. Besides, there was a drawback that the machine frame itself had to be enlarged.

The drawbacks of the conventional lever-type mechanical press have not been solved even in the above-mentioned crank directly-coupled mechanical press. Further, even if the conventional clutch / brake device is simply adopted in the lever type mechanical press, it is not possible to solve the above-mentioned drawbacks. It was desired to develop a mechanical press that eliminates the left and right imbalances and that has a large swing range and a powerful lever without increasing the size of the machine.

[0009]

[Means for solving problems]

 Therefore, in the present invention, a ram for mounting the press upper die is provided on the upper front part of the box-shaped machine frame so that the ram can be raised and lowered, and a lever is pivotally supported at the center of a fulcrum shaft that is horizontally mounted on the upper part of the machine frame. Then, the cylindrical head at the tip of the lever is fitted to a support metal fitting provided on the ram, and the ram is configured to move up and down as the lever swings. The lever is hung at the center of the machine frame. The lower part of the lever is formed into a bifurcated sliding guide part, and the slider bearing is fitted into it, and it is symmetrical with the lower part of the lever as the center, parallel to the fulcrum shaft and at both ends of the crank pin that penetrates the slider bearing. A pair of left and right wheels and a shaft are arranged so as to form a crank shaft, and the shafts at both ends of the crank shaft are rotatably supported by opposite side walls at the bottom of the machine frame. Attach a disk type clutch to the outer end of the There is provided a mechanical press you, characterized in that fitted with disc-type brake on the outer end of the shaft.

[0010]

[Action]

 According to the present invention configured as described above, since the position of the crankshaft for swinging the lever can be provided in the lower part of the machine frame as much as possible, the lever is enlarged and the swing range thereof is enlarged. In addition to gaining, a powerful one with a large thickness can be adopted. In addition, the arrangement of each equipment that converts the input from the motor to the lifting and lowering of the ram is arranged in good balance on the left and right of the long lever that has a fulcrum shaft at the top of the machine frame and hangs down in the center of the machine frame In addition, the center of gravity becomes low, and the above-mentioned conventional defects can be eliminated.

[0011]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the figure, F is a box-shaped machine frame. 1 is a pedestal provided on one side (front side) of the machine frame F. A ram 2 is provided above the pedestal 1 so as to be able to move up and down so as to be movable up and down. On the upper surface of the pedestal 1 and the lower surface of the ram 2, a conventionally known lower die for press and an upper die which are not shown are attached. It Reference numeral 3 denotes a pair of upper and lower bearing fittings provided inside the ram 2.

A cylindrical head 5 at the tip is fitted to the support fittings 3 and 3, and is pivotally supported at the center of a fulcrum shaft 6 which hangs horizontally on the upper part of the machine frame F so as to be swingable. A lever that hangs vertically in the center of frame F. Reference numeral 7 is a bifurcated sliding guide formed on the lower portion of the lever 4. Reference numeral 8 is a slider bearing fitted in the sliding guide portion 7. Reference numeral 9 is a crankshaft which penetrates the slider bearing 8 in parallel with the fulcrum shaft 6 and oscillates the lever 4 by the rotation of the crankpin 10 to drive the ram 2 up and down toward the pedestal 1. .

As shown in FIG. 2, the crankshaft 9 includes a pair of left and right wheels 11 and 12 which are fixed at both ends of a crankpin 10 and face each other on the same axis, and are integrally formed at the centers of the wheels 11 and 12. It is composed of a pair of left and right shafts 13 and 14 which are formed and are coaxially connected to each other, and have a left-right symmetrical shape with the lower part of the lever 4 as the center.

The shafts 13 and 14 at both ends of the crankshaft 9 are rotatably rotatably supported by bearings 31 and 32 provided on opposite side walls at the lower part of the machine frame F, and the outer ends of one shaft 13 are rotatably supported. Further, a disk type clutch 15 that is operated by compressed air is provided, and a disk type brake 18 that is also operated by compressed air in the opposite direction to the clutch 15 is provided at the outer end of the other shaft 14.

As shown in FIGS. 1 and 2, the clutch 15 has a driving wheel 16 driven by a belt 17 on a motor M installed on the upper surface of a machine frame F. When pressurized air is supplied from the rotary joint 30 attached to the inlet 20 at the center of the clutch cover 19 that covers and rotates integrally, the clutch piston 21 that is axially movable inside the clutch cover 19 is supplied. Is squeezed inward, and the friction plate 23 attached to the shaft 13 on the right side in FIG. 2 via the key 22 is clamped between the driving wheel 16 and the shaft 13, and the shaft 13 is driven to rotate.

As shown in FIG. 2, the brake 18, which operates in the reverse direction of the clutch 15 by the operation of an operation control circuit (not shown), is provided at the center of the brake cover 24 fixed to the outer surface of the machine frame F. When pressurized air is supplied from the inlet 25, the brake piston 26 inside the brake cover 24 moves inward to press the friction plate 28 with the bearing member 27, and the friction plate 28 is fixed with the key 29. The shaft 14 on the left side of the crank shaft 9 and the crank shaft 9 are braked.

The rotation of the crank shaft 9 based on the operation of the clutch 15 is converted into the swing of the lever 4 via the pair of left and right wheels 11, 12 and the crank pin 10 and the slider bearing 8 to raise and lower the ram 2. Let

[0018]

[Effects of the Invention] The present invention is provided with a ram for mounting a press upper die on the upper front part of a box-shaped machine frame so that the ram can be moved up and down, and a lever can be swung at the center of a fulcrum shaft horizontally mounted on the top of the machine frame. It is pivotally supported, and the cylindrical head at the tip of this lever is fitted to the support metal fitting provided on the ram, and the ram is configured to move up and down as the lever swings. The slider bearing is fitted in the bifurcated sliding guide formed on the lower end of the lever, and the crank pin is borne by this slider bearing. Eliminating the standing and transmission by the gear train between the output shaft and the lever, the structure is simplified, the interference between the lever and the output shaft is eliminated, and the length and width are increased. It is possible to adopt a lever with a wide range while reducing the weight of the aircraft. .

Further, the present invention comprises a crankshaft, which is composed of a pair of left and right wheels and a shaft, which are connected to both ends of a crankpin passing through the slider bearing so as to be symmetrical about the lower part of the lever. At the same time, the shafts at both ends of this crankshaft are rotatably supported by the side walls facing each other at the bottom of the machine frame.A disk-type clutch is attached to the outer end of one shaft, and the other end is mounted to the outer end of the other shaft. Since a disc-type brake is attached, it has the effect of forming a low center of gravity on the fuselage, which was not possible with conventional direct-crank press machines, and improving the vertical and horizontal balance. . In addition, the crankshaft according to the present invention synergizes the flywheel effect of the wheel and the inertial effect of the driven wheels of the clutches and brakes at both ends, so that the pressure increase of the lever can be obtained even with a small size. There is also an effect.

[0020]

[Brief description of drawings]

FIG. 1 is a partially cutaway vertical sectional elevation view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

[0021]

[Explanation of symbols]

 F Machine frame 1 Cradle 2 Ram 3 Support bracket 4 Lever 5 Cylindrical head 6 Support shaft 7 Bifurcated sliding guide 8 Slider bearing 9 Crankshaft 10 Crankpin 11 Wheel 12 Wheel 13 Shaft 14 Shaft 15 Disc type Clutch 16 Driving wheel 17 Belt 18 Disc type brake 19 Clutch cover 20 Inlet port 21 Clutch piston 22 Key 23 Friction plate 24 Brake cover 25 Inlet port 26 Brake piston 27 Bearing member 28 Friction plate 29 Key 30 Rotary joint 31 Bearing part 32 Bearing Department M motor

Claims (1)

[Scope of utility model registration request] 1. A box-shaped machine frame (F) is provided with a ram (2) for mounting a press upper die on a front upper part of the machine frame (F) so that the lever (4) can be swung at the center of a fulcrum shaft (6) horizontally mounted on the top of the machine frame (F). The ram 2 is pivotally supported, and the cylindrical head 5 at the tip of the lever 4 is fitted to the support metal fitting 3 provided on the ram 2, and the ram 2 is moved up and down as the lever 4 swings. A lower portion of the lever 4 that hangs down in the center of F is formed into a bifurcated sliding guide portion 7 to which a slider bearing 8 is fitted, and a crank pin 10 that penetrates the slider bearing 8 in parallel with the fulcrum shaft 6. A pair of left and right wheels 11 and 12 and shafts 13 and 14 are arranged at both ends of the lever 4 so as to be symmetrical with respect to the lower portion of the lever 4 to form a crank shaft 9 and The shafts 13 and 14 at both ends are respectively rotated on opposite side walls at the lower part of the machine casing F. Bearings in place, a disk type clutch 15 is attached to the outer end of one shaft 13, and the other shaft 1
A mechanical press having a disk type brake 18 attached to the outer end of 4.