JP3124665U - Press machine - Google Patents

Abstract

The present invention provides a pressing machine capable of obtaining a uniform pressing force by moving a movable plate up and down in parallel by a plurality of cams.
A pressing machine 1 includes two cams 13 and 15 arranged in parallel to a fixed base 2, and the movable bases 7 and 8 are moved to the fixed base 2 by rotating the cams 13 and 15 in synchronization. Move up and down in parallel to The movable bases 7 and 8 are connected via four posts 10a, 10b, 10c, and 10d inserted through the post holes 5a, 5b, 5c, and 5d, and are controlled by movement only in the vertical direction. To do. Further, sprockets 13b and 15b connected by a chain 16 are provided at the end portions of the cams 13 and 15, and the cams 13 and 15 rotate in synchronization to move the movable bases 7 and 8 up and down.
[Selection] Figure 1

Description

  The present invention relates to a press machine that drives a press die by driving a cam, and more particularly to a press mechanism that can obtain a uniform press pressure by moving the press die up and down in parallel by a plurality of cams.

  Conventionally, press machines having various structures have been proposed, and appropriate press machines are used in accordance with processing applications. In particular, a cam mechanism is used in a press machine that presses small precision parts with a simple structure, and the press die is driven up and down by the rotation of the cam mechanism to obtain the desired press accuracy. (See Patent Document 1). The press machine has two types of eccentric cams fixed to a single camshaft. In the initial press stage, the cam has a large diameter to secure the amount of movement of the press die, and in the late press stage, the cam has a small diameter. A large press pressure is obtained by switching, and a cam corresponding to the press process is selected and used.

JP 2000-103640 A

  However, when molding thin materials such as cloth materials and fiber materials, especially when the molding pressure is relatively small such as a three-dimensional mask and precise processing based on high parallel accuracy is required, a single camshaft When the press die is driven by the above, it may be difficult to uniformly transmit the driving force to the press die.

  Further, in the case of driving with a single cam shaft, the pressure concentrates on the portion where the cam contacts the press die, and it may be difficult to apply a uniform pressure over the entire surface of the press die. In particular, pressure applied in proportion to the cam can be obtained at the part where the cam is in contact, but at the part not in contact with the cam such as the end of the press die, the cam force can be transmitted sufficiently due to mold distortion. In some cases, it was difficult to maintain the press accuracy.

  Accordingly, an object of the present invention is to provide a press machine that can obtain a uniform press pressure by moving a press die up and down in parallel by at least four posts and a plurality of cams.

The present invention according to claim 1 has a fixed base (2) (20) and a movable base (7, 8) (26) supported so as to be movable toward and away from the fixed base (2) (20). In the press machine (1) (100) for processing the product between the fixed base (2) (20) and the movable base (7, 8) (26),
At least four posts (10a, 10b, 10c, 10d) for supporting the movable table (7, 8) (26) on the fixed table (2) (20) movably in the vertical direction;
A plurality of cams (13, 15) (24a, 24b, 25a, 25b) supported by a plurality of support shafts (13a, 15a) (21, 22) and having the same outer shape;
Interlocking means that interlocks the plurality of cams (13, 15) (24a, 24b, 25a, 25b) so as to rotate synchronously;
The movable table (7, 8) (26) is guided by the at least four posts (10a, 10b, 10c, 10d) and is rotated in synchronism with a plurality of cams (13, 15) (24a, 24b). 25a, 25b) is held parallel to the fixed base (2) (20) and moved up and down.
This is a press machine (1) (100).

According to a second aspect of the present invention, each of the support shafts (21, 22) is provided with a plurality of the cams (24a, 24b, 25a, 25b).
A press machine (100) according to claim 1.

  The reference numerals in parentheses above are for comparison with the drawings, but this is for convenience to facilitate understanding of the invention and has no effect on the description of the claims for utility model registration. It does not affect.

  According to the first aspect of the present invention, the movable base is supported by at least four posts so as to be movable with respect to the fixed base, and a plurality of cams having the same outer shape supported by the plurality of support shafts are provided. Since it moves in the vertical direction by rotating in synchronization, the product can be processed precisely by moving the movable base up and down parallel to the fixed base.

  According to the second aspect of the present invention, since the support shaft is provided with a plurality of cams, the driving force from the cams can be distributed and transmitted to the movable table, and the plurality of cams are synchronized with each other. Since a plurality of parts are driven, the movable base can always be moved up and down in parallel.

<Embodiment 1>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a press machine according to the first embodiment. In FIGS. 1 and 2, the press machine 1 includes a fixed base 2, a pair of movable bases 7, 8, a movable base 7, 8 and a cam mechanism 12 that drives the elevator 8 up and down.

  The fixing base 2 is a base of the press 1 fixed on the floor or a desk, and a substantially rectangular lower fixing plate 3 and an upper fixing plate 5 having the same shape are fixed by side plates 6a, 6b, 6c and 6d. ing. Post holes 5a, 5b, 5c, and 5d for inserting posts 10a, 10b, 10c, and 10d are perforated at four positions on the diagonal line of the upper fixing plate 5, and the posts 10a, 10b, 10c, and 10d are formed. Is supported to be freely inserted (see FIG. 3).

  Bearing holes 18a and 18b are formed in the opposing side plates 6a and 6c, respectively, and the cam mechanism 12 is rotatably supported.

  The movable bases 7 and 8 are plate-like members having substantially the same shape as the lower fixed plate 3 and the upper fixed plate 5, and are connected in parallel to each other via four posts 10a, 10b, 10c, and 10d. . The movable table 7 is arranged between the lower fixed plate 3 and the upper fixed plate 5 inside the fixed table 2, and the movable table 8 is located on the upper surface of the upper fixed plate 5 outside the fixed table 2. It arrange | positions in the side facing 5e, and is supported by the fixing stand 2 by the post | mailboxes 10a, 10b, 10c, and 10d which penetrated the post holes 5a, 5b, 5c, and 5d of the upper side fixing plate 5. FIG.

  A lower press die 19a is fixed to the upper surface 5e of the upper fixed plate 5, and an upper press die 19b is fixed to a position facing the lower press die 19a on the lower surface of the movable table 8, and the movable table 7, 8 can be moved up and down to press the material placed between the press dies 19a and 19b.

  Each of the posts 10a, 10b, 10c, and 10d is a cylindrical member having the same shape, and has a diameter that can be inserted into the post holes 5a, 5b, 5c, and 5d. In addition, springs 11a, 11b, 11c, and 11d are fitted between the movable base 8 and the upper fixed plate 5 in the posts 10a, 10b, 10c, and 10d inserted through the post holes 5a, 5b, 5c, and 5d. The movable table 8 is urged in a direction away from the upper fixed plate 5.

  The cam mechanism 12 has two cams, a first cam 13 and a second cam 15, and the first cam 13 and the second cam 15 are movable bases inside the fixed base 2. 7 and the upper fixing plate 5 are arranged in parallel with each other and at the same position from the center line AA of the fixing table 2. Support shafts 13a and 15a extend outward in the axial direction from the center of the cross section of both ends of the first cam 13 and the second cam 15, respectively, and the support shafts 13a and 15a are in the bearing holes 18a and 18b. Is supported rotatably. Sprockets 13b and 15b for transmitting driving force are provided at the ends of the first cam 13 and the second cam 15, and a chain 16 is wound around and connected to the sprockets 13b and 15b. ing.

  A handle lever 17 extends vertically upward from the tip of the support shaft 13a of the first cam 13, and the first cam 13 and the second cam 15 are synchronized with each other by tilting the handle lever 17. Can rotate.

  The cross-sectional shapes of the first and second cams 13 and 15 are shapes that connect the short axis 13c and the long axis 13d with a curve, and the movable base 7 and the upper fixed plate 5 can be brought close to each other by the short axis 13c. At the same time, the movable base 7 can be moved away from the upper fixed plate 5 by the long axis 13d, that is, the press die 19b can be moved downward.

  In addition, the cross-sectional shape of the first and second cams 13 and 15 can be an elliptical shape that is an axis object. As shown in FIG. 4, when the cross-sectional shape of the first and second cams 13 and 15 is an axial shape, the bearing holes 18 a and 18 b are directed from the lower fixing plate 3 to the upper fixing plate 5. It is necessary to form a (longitudinal) round long hole so that the cam mechanism 12 can rotate while being freely movable in the bearing holes 18a and 18b.

  Next, the operation of the press machine 1 having the above structure will be described.

  The press machine 1 in the initial state is in a position where the movable table 8 is separated from the upper fixed plate 5 by the biasing force of the springs 11a, 11b, 11c, and 11d, and from the gap provided between the press dies 19a and 19b. Supply processing materials. At this time, the upper fixed plate 5 and the movable base 7 are in contact with the short shafts 13 c of the first cam 13 and the second cam 15.

  Next, when the handle lever 17 is tilted clockwise in FIG. 1 (broken line position), the driving force is transmitted to the first cam 13 via the support shaft 13a. In the first cam 13, the driving force is transmitted to the second cam 15 via the chain 16 by the sprocket 13b, and the first cam 13 and the second cam 15 start to rotate in synchronization.

  The movable table 7 and the upper fixed plate 5 that have been in contact with the short shaft 13c are moved to the long shaft 13d side by the rotation of the first and second cams 13 and 15, and the movable table 7 is lowered. To do. When the movable table 7 is lowered, the first cam 13 and the second cam 15 rotate at the same angle, so that the movable table 7 can be lowered in parallel with the upper fixed plate 5. In addition, since the movable table 8 is connected in parallel with the movable table 7 via the posts 10a, 10b, 10c, and 10d, in combination with the synchronous rotation of the cams 13 and 15, the upper table 5 is fixed. Move down in parallel.

  At this time, if the cross-sectional shape of the first and second cams 13 and 15 is elliptical, the first cam 13 and the second cam 15 are in contact with the upper fixing plate 5 by the short shaft 13c. As the contact position moves toward the long shaft 13d, the distance from the center of the support shafts 13a and 15a to the upper fixing plate 5 changes, so that the support shafts 13a and 15a descend in the bearing holes 18a and 18b.

  On the other hand, each post 10a, 10b, 10c, and 10d descends while sliding in the post holes 5a, 5b, 5c, and 5d as the movable bases 7 and 8 are lowered. And the movable bases 7 and 8 are lowered in parallel with the fixed base 2.

  When the press dies 19a and 19b approach each other due to the lowering of the movable table 8, pressure is applied to the work material placed between the two dies, and the rotation of the first cam 13 and the second cam 15 until a predetermined pressure is reached. Is continued.

  In the press machine 1 in which the press is completed by the above press process, the press material is taken out by the reverse operation to the above. That is, when the operating force of the handle lever 17 is weakened, the movable bases 7 and 8 that have been pressed by the long shaft 13d begin to rise due to the urging force of the springs 11a, 11b, 11c, and 11d. As the movable bases 7 and 8 rise, in the first cam 13 and the second cam 15, the contact portion with the movable base 7 shifts from the long axis 13d to the short axis 13c side. Accordingly, the support shafts 13a and 15a in the case where the cam shape is an elliptical shape rises in the bearing holes 18a and 18b while rotating.

  When the movable bases 7 and 8 are lifted and the movable base 7 and the upper fixed plate 5 are in contact with the short shaft 13c, the press dies 19a and 19b return to their original positions, take out the pressed material, and perform the next press processing. Prepare for.

  As described above, in the press 1, the first and second cams 13 and 15 arranged on the fixed base 2 move up and down while moving in synchronization with each other. It can move up and down parallel to the fixed base 2. Further, since the movable bases 7 and 8 are connected by the four posts 10a, 10b, 10c, and 10d inserted through the fixed base 2, only the vertical direction is combined with the synchronous rotation of the cams 13 and 15. The movement can be restricted, and it always moves up and down in parallel with the fixed base 2.

<Embodiment 2>
Next, a press machine according to the second embodiment will be described. In addition, about the site | part similar to the press 1 of 1st Embodiment, the code | symbol mentioned above is attached | subjected and description is abbreviate | omitted.

  FIGS. 5 to 7 show a press machine 100 according to the second embodiment. The press machine 100 is supported via a fixed base 2 and posts 10a, 10b, 10c, and 10d above the fixed base 2. FIG. An upper fixed plate 20, a movable table 26 that can be moved up and down between the fixed table 2 and the upper fixed plate 20, a cam mechanism 30 that drives the movable table 26, and a driving device 32 are provided.

  The upper fixing plate 20 is a plate material having substantially the same shape as the upper fixing plate 5 of the fixing base 2, and the upper fixing plate 20 is formed by posts 10 a, 10 b, 10 c, 10 d erected from four positions on the diagonal line of the upper fixing plate 5. It is arranged in parallel with the fixed plate 5.

  A press die (not shown) is fixed to the upper surface of the movable base 26 and the lower surface of the upper fixing plate 20. Post holes 26a, 26b, 26c, and 26d through which the posts 10a, 10b, 10c, and 10d are inserted are drilled at four locations on the diagonal of the movable table 26. The movable table 26 has posts 26a, 26b, 26c, and 26d. It is supported by the fixed base 2 through the via so as to be movable up and down. Further, four cam receiving projections 23a, 23b, 23c, and 23d are provided on the diagonal line on the lower surface side of the movable table 26, and the movable mechanism 26 can be moved up and down by the cam mechanism 30 coming into contact therewith.

  The cam mechanism 30 includes bearings 31a, 31b, 31c and 31d fixed to the upper fixed plate 5, a support shaft 21 rotatably supported by a set of bearings 31a and 31b, and a set of bearings 31c and 31d. It has a support shaft 22 that is rotatably supported and a drive device 32 that rotates the support shafts 21 and 22.

  The bearings 31a and 31b and the bearings 31c and 31d are bearings that are arranged in parallel at equal positions from the lateral center line BB of the fixed base 2 and have a proof strength capable of withstanding a press load.

  The bearings 31a and 31b and the support shafts 21 and 22 supported by the bearings 31c and 31d are provided with cams 24a and 24b and cams 25a and 25b, respectively, and rotate together with the support shafts 21 and 22. it can. The cams 24a, 24b, 25a, 25b are cams having the same outer shape, each having a short shaft 13c and a long shaft 13d, and abutting the cam receiving projections 23a, 23b, 23c, 23d while rotating. .

  Sprockets 21 a and 22 a having the same number of teeth are fixed to the ends of the support shafts 21 and 22, and the sprockets 21 a and 22 a are connected to each other via a chain 16. Further, a driving gear 21b is provided at the tip of the support shaft 21, and the driving gear 21b is engaged with the driving device 32 to transmit a driving force.

  The drive device 32 is a drive source in which the electric motor 32a and the speed reducer 32b are integrated, and can be driven to rotate forward or backward by operating switches arranged on an operation panel (not shown).

  In the second embodiment, the sprockets 21a and 22a are connected via the chain 16. However, the gears can be connected to each other.

  Next, the operation of the press machine 100 having the above structure will be described.

  The movable table 26 in the initial state before press working is located at a position separated from the upper fixed plate 20 by the action of gravity or by the biasing force of the springs 11a, 11b, 11c, and 11d (not shown). Press material is supplied from between the upper fixed plate 20 and the upper fixed plate 20. At this time, the cam receiving projections 23a, 23b, 23c and 23d of the movable base 26 are in contact with and supported by the cams 24a and 24b and the short shafts 13c of the cams 25a and 25b, respectively.

  Next, when the drive device 32 is driven by operating the switch on the operation panel, power is transmitted to the sprockets 21a and 22a via the drive gear 21b and the drive chain 16, and the support shafts 21 and 22 start to rotate.

  As the support shafts 21 and 22 rotate, the cam receiving projections 23a, 23b, 23c, and 23d that have been in contact with the short shaft 13c are moved up in contact with the long shaft 13d. At this time, since the support shafts 21 and 22 rotate at an equal angle, the movable base 26 rises in parallel to the upper fixed plate 5. Further, since the movable base 26 is raised while being guided by the posts 10a, 10b, 10c, and 10d, the movable base 26 moves only in the up-and-down direction without moving in the left-right front-rear direction with respect to the upper fixed plate 5.

  When the press dies approach each other as the movable table 26 moves up, pressure is applied to the work material placed between the two dies, and power is transmitted to the support shafts 21 and 22 until a predetermined pressure is obtained.

  In the press machine 100 in which the press process is completed by the above operation, the press material is taken out by the reverse operation to the above. That is, when the drive device is reversely driven by operating the switches on the operation panel, the movable table 26 pressed by the long shaft 13d of the eccentric cams 24a, 24b, 25a, 25b is caused by gravity action or springs 11a, 11b, The lowering is started by the urging forces of 11c and 11d.

  When the cam receiving projections 23a, 23b, 23c, and 23d come into contact with the short shaft 13c due to the lowering of the movable base 26, a gap is again formed between the press dies, and the material after the press process can be taken out. .

  As described above, since the press machine 100 moves the movable table 26 up and down by the support shafts 21 and 22 arranged in parallel, the movable table 26 can be driven in parallel to the fixed table 2. Further, since the movable base 26 is supported by the four posts 10a, 10b, 10c, and 10d, it can always move up and down in parallel with the fixed base 2.

  As mentioned above, although this invention was demonstrated based on the suitable embodiment, the press machine of this invention is not limited only to the structure of the said embodiment, The 1st cam 13 and the 2nd cam 15 Alternatively, in addition to the drive by the two cams of the support shafts 21 and 22, a configuration having three or more cams operates similarly to the present invention. Further, even if the movable side member and the fixed side member are configured in reverse, the same effect is obtained. Furthermore, a press machine in which various modifications and changes are made from the configuration of the above embodiment is also included in the scope of the present invention.

It is a front view which shows the main cross sections of the press in 1st Embodiment. It is a side view which shows the main cross sections of the press in 1st Embodiment. It is a top view which shows the post hole drilled in the fixed base. It is a front view which shows the cam mechanism of a press machine. It is a front view which shows the main cross section of the press in 2nd Embodiment. It is a side view which shows the main cross sections of the press in 2nd Embodiment. It is a top view which shows the cam mechanism of a press machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press machine 2 Fixed stand 7, 8 Movable stand 10a, 10b, 10c, 10d Post 13, 15 Cam 16 Chain 26 Movable stand 100 Press machine

Claims (2)

In a press machine that has a fixed base and a movable base that is supported so as to be movable toward and away from the fixed base, and processes a product between the fixed base and the movable base,
At least four posts for supporting the movable base on the fixed base in a vertically movable manner;
A plurality of cams respectively supported by a plurality of support shafts and having the same outer shape;
Interlocking means for interlocking to rotate the plurality of cams synchronously,
The movable table is guided by the at least four posts and is moved up and down while being held parallel to the fixed table by a plurality of cams rotating synchronously.
A press machine characterized by that. Each of the support shafts is provided with a plurality of the cams.
The press according to claim 1.

Images