JPS6096399A - Press device - Google Patents

Abstract

PURPOSE:To provide an inexpensive press with which different shut heights can be easily obtd. by constituting pressing plates pulled and mounted by means of a spring to an upper frame in such a way that the plates can be screwed to and unscrewed from a spacer plate interposed between said plates and the upper frame by means of a relative screw. CONSTITUTION:Plural pressing plates 71 are pulled and mounted to an upper frame 6, which ascends and desceds at a specified stroke with respect to a bolster (not shown), by means of a spring 74a via a supporting shaft 75 with a press device provided with said frame 6. A spacer plate 72 which contacts with the bottom surface of the frame 6 is interposed and disposed between the plates 71 and the frame 6 and the plate 72 is screwed to the plates 71 in suc a way that said plate can be screwed to and unscrewed from the pressing plates by means of a relative screw 73 thereby permitting easy change of the shut height. A cam handle 8 supported pivotally to a bracket 81 is equipped to the upper part of the frame 6 and the above-mentioned supporting shaft 75 is depressed by which the shut height is easily adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a mechanical press device, and more particularly to an improvement in a press device for processing members such as sashes for vehicles or construction, moldings for automobiles, and the like.

BACKGROUND TECHNOLOGY For example, when press forming moldings and sashes for automobiles, a metal strip material of a certain width is usually formed into a profiled material with a predetermined cross section, or a resin is extruded to form a profiled material with a fixed cross section. After cutting a long material to a desired length, the long material is subjected to treatments such as partial cutting, drilling, notch bending, and drawing. specifically,
In the processing process of Weatherstrip Belt Molding M (see Figure 1), which is made by composite extrusion molding of soft vinyl chloride resin and a metal plate such as a stainless steel plate, the belt is run and cut to a certain length after composite extrusion molding (see Figure a). Something,
If the cross-sectional shape is complex, deformation is likely to occur; if the cross-sectional shape is relatively simple, such as a U-shape, some can be cut as they are running, but in most cases the edge f is trimmed. Re-cutting is required. After cutting the edge including a part of the outer surface part A (see the figure), cut out a part of the lower side B of the edge for the subsequent bending process, and make a corner where a clip or the like is fitted and fixed. A hole C is formed (see Figure C), and the end portion is finally bent into a predetermined shape.

Conventionally, floating dies were used as press dies for this type of processing, and four presses were installed along a conveyor that ran in a straight line, with one person working on each press. Mass production is possible by assigning personnel.

By the way, in the automobile industry, as social and user needs are diversifying, it is necessary to reduce wasteful inventory as much as possible, and to provide users with what they need, when they need it, in the amount they need, and immediately. Can be produced and delivered. There is a shift to the so-called campan method or just-in-time method. When processing moldings for automobiles using this method, for example, one worker must be in charge of four steps, and multiple molds are fixed as one unit to one press machine. It is necessary to insert the end of the molding into each mold to perform processing.

To deal with this, the stroke from the top dead center of the ram to the bottom dead center is always constant.Although this cannot be changed in the same press device, the height from the polster surface of the press device to the bottom dead center of the ram is constant. That is, since the shut hide is adjustable, it is conceivable to adjust the shut hide.

However, it is often necessary to adjust the processing stroke for actually pressing the die during the trial stage after the press die is completed, especially when there are multiple dies that include a drawing die or a bending die. For example, when a bending die is actually processed on a test basis, it often requires adjustment of about 1 to 5 meters. To adjust the stroke amount, for example, if the stroke amount is too large, the bottom plate of the mold can be ground down, and vice versa, if it is insufficient, an additional bottom plate can be fixed to the bottom of the mold. If you adjust the overall shut hide, the amount of shut hide in other adjacent molds will become inappropriate, and there will be slight differences in bending depending on the loft of the material used, so it is desirable to be able to adjust it every 10 points. However, the relationship between the press stroke and shut hide (see Figure 2) is such that four molds A to D are fixed on one pole star of the press machine, and the most desirable bottom dead center of each mold is determined. The optimal position of each point a′
~d', the shut hide from the surface of the polster will be different, and it is completely impossible to obtain the optimum shut hide for each mold using a normal press machine. Note that in FIG. 1, points a to d are the positions of each open height.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a press device that can easily obtain different shut hides with a single press that moves up and down, and can be manufactured at a lower cost than a normal crank press device.

That is, in the press device according to the present invention, a plurality of pressing plates are tensioned with springs in parallel to an upper frame that moves up and down with a constant stroke with respect to the polster surface, and the gap between each of the pressing plates and the upper frame is By interposing spacer plates that contact the bottom surface of the upper frame, and by screwing each spacer plate with the pressure plate using relative screws, the shut hide by each pressure plate can be individually controlled by screwing in and unscrewing the spacer plate. It is configured to be adjustable.

An example will be described below with reference to FIGS. 3 to 8.

In this press device (see Figure 3), press molds A, B,
A roughly rectangular plate-shaped polster 1 on which C and D are placed and fixed is fixed to a frame 2, and a roller device that allows the press molds A to D to be slid when placed on the side of the polster l is fixed to the frame 2. (not shown) +1a, llb, I
lc is formed. On the other hand, in the vertical direction, press mold A
- Clamps to secure D onto polster l (not shown)
Inverted T-shaped grooves 12a and 12b are formed continuously in the longitudinal direction to accommodate and lock a portion of the grooves. In addition, cylindrical guide posts 3 are provided on both ends of the polster 1 in the longitudinal direction.
a.

3b is fixed with bolts etc., and the guide post 3
Inside a and 3b is a round guide bar 4 that can be slid up and down.
a and 4b are inserted and arranged. The guide bar 4a
, 4b passes through the hole 13 provided in the polster l, and one end of a connecting rod 51 is connected to the flat tip 41 via a pin. This connecting rod 51
is fitted into the other end side or the side surface of the flywheel 52, and furthermore, a spur gear is formed on the outer peripheral edge of the flywheel 52. Although not shown, the same flywheel as the right side is arranged on the left side of the drawing, and the left and right flywheels are connected by a shaft. A spur gear 53 meshing with the gear is connected to a pulley 55 via an electromagnetic clutch 54. An electric motor 57 is connected to the pulley 55 via a V-belt 56, and the guide bars 4a, 4b are moved up and down by the drive of the electric motor 57.

Further, the upper frame 6 is attached to the upper end 42 of the guide bar 4b.
1, the nut 62 is tightened firmly. Therefore,
The height dimension of this upper frame 6 with respect to the polster l is nut 6
By rotating 2, the shape of the screw 43 can be adjusted within the range of shape. In addition, the upper frame 6 can be configured with a wide intermediate part 63 and narrow widths at both ends 61, integrally made of metal casting or welded steel plates, so as to increase bending rigidity in the vertical direction, and the intermediate part 63 has a space inside. Approximately gutter-shaped with both sides 64. Three reinforcing plates 6 having a bottom portion 65 and connecting both side portions 64 and 64.
6, 66.

66. The upper frame 6 is equipped with a pneumatic sill 44. to prevent the guide bars 4a, 4b from becoming eccentric when they slide up and down and to move up and down in a well-balanced manner.
It is supported by 44. Air is supplied to only one of these cylinders 44, 44 so that the rod of the cylinder is always extended.

A mechanism is attached to the upper frame 6 that allows the shut hide for each mold A to D to be adjusted individually. The adjustment mechanism 7 (see Fig. 4) is a disc-shaped pressure plate.
71 and a ring-shaped spacer plate 72. The pressure plate 71 has a cylindrical convex portion 71a at the center of the main body, and the spacer plate 72 is ring-shaped and threaded on the inner peripheral surface, and has a relative thread 73 with a screw cut on the outer periphery of the convex portion of the press plate 71.
are screwed together. Also, is the pressing plate 71 a spring? It is tension-mounted to the upper frame 6 at 4a or 74b. The spring is a compression spring 74 a (
4 and 6), or a tension spring 74b connected to the upper end of the axis of the support shaft 75 (see FIGS. 7 and 8). The support shaft 75 is arranged to protrude upward through an opening formed in the bottom plate 65 of the upper frame 6, and springs 74a and 74b are attached to the protruding shaft side.

Is this a compression spring? 4a, a collar 76 is attached to the upper end of the support shaft 75, and the collar 76 is fitted between the collar 76 and the upper surface of the upper frame 6. Therefore, this compression spring? 4a, by supporting the collar 76 upwardly, the spacer plate 72 is pressed into contact with the lower surface of the upper frame 6 via the support shaft 75.
It can be tension mounted. An operator pulls down the pressure plate 71 against the compression spring 74a to create a gap between the lower surface of the upper frame 6 and the upper surface of the spacer plate 72, and adjusts the shut hide by rotating the spacer plate 72. Alternatively, insert a rod etc. into the hole provided on the side of the spacer plate 72 and force it to rotate (
(See Fig. 6) However, by further equipping with a cam handle 8, the O adjustment operation can be performed (see Figs. 4 and 5).

The cam hand 8 has a stand bracket 81 placed on the upper surface of the upper frame 6, and a handle 82 attached to the stand bracket 81.
The cam plate 83 can be configured to be mounted on a shaft. The cam plate 83 has a spring plunger 85 in a receiving hole 84 on the side.
A notch 86 is provided on the edge of the cam surface corresponding to the stopping position, and a protrusion protrudes from the shaft head of the support shaft 75. 5a (see Fig. 4). In this cam handle 8, when the handle 82 is first rotated upward, the surface of the cam 83 presses down the distal end side of the support shaft 75 against the compression spring 74b, and the notch 86 provided on the cam surface presses down on the shaft shaft head. The protrusion? 5a. The tip of the spring plunger 85 also fits into the receiving hole 84 provided on the side surface of the cam 83, thereby fixing the handle 82 in a predetermined upright position (see FIG. 5a). 1. Since a gap is generated between the lower surface and the upper surface of the spacer plate 72, adjust the spacer plate 72 by holding the suppression plate 71 by hand and rotating the spacer plate 72 clockwise to screw the spacer plate 72 in with the relative screw 73. . Next, the handle 82
When the compression spring is turned back to its original position laterally? Pull up the support shaft 75 for the explosive attack of 4a,
By press-fixing the upper surface of the spacer plate 72 to the lower surface of the upper frame 6, it is possible to adjust the shut hide to be large (
(See Figure 5).

On the contrary, when adjusting the shut hide to be shorter, the spacer plate 72 may be unscrewed counterclockwise with the relative screw 73 to increase the distance between the spacer plate 72 and the press brake 71.

On the other hand, a tension spring? 4b, the end of the spring may be latched and supported by a horizontal parr 77 extending between the upper surfaces of the upper frame 6 (see FIG. 7). It is also possible to provide a hand clamp 9 on the upper surface of the upper frame 6 and connect the spring end to the lower end of the link arm 8a which can be bent and extended up and down (see FIG. 8).

Note that these adjustment mechanisms are movable in the lateral direction of the two frames 6 along horizontally elongated holes 67 provided in the bottom plate of the upper frame 6 (see FIG. 4). This is so that the position of each pressing plate 71 can be adjusted to correspond to the molds A to D placed on the polster 1. Note that both sides 64 of the upper frame 6
If the strength of
7 is also unnecessary.

Effects of the Invention As described above, according to the press device of the present invention, the shut/shut can be adjusted individually for each press die by simply adjusting the gap between the press plate and the spacer plate. Therefore, the time required to replace and adjust the press die is extremely short, and when the lower surface of the press plate presses the press die, the pressure is transmitted to the upper frame via the press plate and the spacer plate, so the suppression plate Durability in use is improved because no pressure is applied to the supporting means of the press, and since it can be constructed with a simple mechanism, the production cost is lower than that of a normal commercially available crank press with a polster of approximately the same size. can be extremely reduced.

[Brief explanation of the drawing]

1A to 1D are explanatory diagrams showing the processing state of a workpiece to be pressed, and FIG. 2 is a graph showing the relationship between cylinder stroke and shut hide for each mold assembled in the same press device, 3a and 3b are a front view and a side view of the press device according to the present invention, FIGS. 4a and 4b are a side sectional view and a plan view of the shut-hide adjustment mechanism incorporated in the device, and FIG. 5a is a , b are explanatory views of the operation of the same mechanism, and 6th to 8th are explanatory views of adjustment mechanisms according to other embodiments. l: Polster, 6: Upper frame, 71: Pressing plate, 72
Varnish spacer plate, 73: Relative screw, 74a. 74b=spring, 75: support shaft, 8: cam handle, 9: hand clamp. 1. Indication of the case Japanese Patent Application No. 58-205457 2. Name of the invention Pressing device 3. Person making the amendment Relationship to the case Patent applicant name Name Hashimoto Forming Industry Co., Ltd. 6. Drawings to be amended 7. Contents of the amendment "6" in "Figure 6 a, b" in the drawings attached to the application is attached to Attachment-4
Correct it to ``3'' as if it were not allocated to 4. Procedural amendment (formality) 1. Indication of the case Japanese Patent Application No. 1982-205457 2, name of the invention Pressing device 3, person making the amendment Relationship to the case Patent applicant name Name Hashimoto Forming Industry Co., Ltd. February 8, 1980 (Shipping date: 59.2 .28) 6. Brief description of drawings in the specification subject to amendment 7. Contents of amendment

Claims (6)

[Claims] (1) A plurality of pressure plates are attached in parallel to the upper frame, which moves up and down with a constant stroke with respect to the polster surface, and are tensioned with springs, and each pressure plate and the upper frame touch the bottom surface of the upper frame. A press device characterized in that a contacting spacer plate is interposed, each spacer plate is screwed into a pressing plate with a relative screw, and screwed so as to be rotatable when unscrewed. (2) The press device according to claim 1, wherein the support shaft of the press plate that projects upwardly from the top is tensioned by a spring. (3) The press device according to claim 2, wherein a compression spring is fitted and arranged on the axis of the support shaft. (4) The press device according to claim 2, wherein the support shaft can be pushed down or released against a compression spring by a cam handle supported on a bracket above the upper frame. (5) The press device according to claim 2, wherein the support shaft is tension-mounted with a tension spring. (6) Claim 4 in which the tension spring can be tension-supported or tension-released using a hand clamp.
The press device described in Section 1.