JPS6156128B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reciprocating conveyance device, and more particularly to a reciprocating conveyance device that can change the reciprocating stroke.

In general, in a press line that presses automobile bodies and other relatively large press products, an inter-press transfer device called a shuttle feeder is installed between the presses, and the front press (pre-process side) presses the press. The intermediate product is placed on a reciprocating truck by an unloader, and after the truck is moved near the press on the rear side (post-process side), the press intermediate product is loaded into the press on the rear side by the loader. By the way, in this press line, after processing a predetermined quantity of a certain press product, when switching to processing another press product, the molds of each press are replaced, and with this replacement, the reciprocating stroke of the reciprocating cart is changed. changes are often required. For example, as shown in FIG. 1A, the reciprocating stroke of the reciprocating cart 83 when the centers of the products of both the front press 81 and the rear press 82 coincide with the center of the press mold mounting bolster. S, if the center of the product in the rear press 82 is shifted by L from the center of the bolster as shown in FIG. By changing only L to the front press 81, the intermediate product can be loaded into the rear press 82 at a position along the mold. Note that the broken line arrow in the figure indicates movement by an unloader or a loader. However, since the drive mechanism of the reciprocating cart 83 generally converts the rotation of the crank into linear motion and uses the dead point of the crank to stop it, it is not possible to change only the stopping position of one of the reciprocating ends in this way. I can't. Furthermore, as shown in FIG. 1C, the stopping position of the reciprocating carriage 83 may be changed by L/2 to the front and rear sides, respectively, but in this case, large-scale work such as changing the mounting position of the crank relative to the crank is required. becomes.

This invention has been made in view of the above points, and is a reciprocating conveyance device that can easily change the reciprocating stroke and can also change the reciprocating stroke without changing the stopping position of one of the reciprocating ends. This is what we are trying to provide.

A first embodiment in which the present invention is applied to an inter-press conveyance device will be described below with reference to FIGS. 2 to 5.

In the figure, reference numeral 1 denotes an interpress transfer device, in which a reciprocating cart 4 is mounted on a rail 3 provided parallel to the upper part of a base frame 2 at an arrow mark
It is placed so that it can move back and forth in the direction. Reference numeral 5 denotes a drive mechanism for linearly driving the reciprocating cart 4, which is pivotally supported by a fixed gear 7 fixed to a box 6 fixed to the base frame 2 and an arm 9 rotatable around the central axis 8 of this gear. It has a gear train consisting of a gear 10 and a gear 11 which is pivotally supported at the tip of the arm 9 and has a pitch circle diameter 1/2 that of the fixed gear 7, meshing in a straight line. A known mechanism is used in which the bases of arms 12 of the same length are fixed to the gear 11 and the distal ends 12a of the arms 12 are pivotally supported on the reciprocating cart 4. The base of an arm 9 is fixed to the upper end of a shaft 13 which is rotatably supported by the fixed gear 7 and the box 6 via bearings, and a gear 14 is fixed to the intermediate portion of the shaft 13. Guide hole 15 extending in the longitudinal direction of the base frame bored in the box 6
A rod 16 is fitted into the rod 16 so as to be slidable in the longitudinal direction, and a rack 17 carved on one side of the rod 16
is meshing with gear 14. Further, 18 is an electric motor with a reduction gear, and a chain wheel 18a fixed to its drive shaft.
A driving chain 22 is wound around a chain wheel 21 fixed to a central shaft 20 rotatably supported on the base frame 2 by a bearing stand 19. Reference numeral 23 indicates an air clutch brake for braking disposed opposite to a brake disc fixed to one end of the center shaft 20; 24 indicates an air clutch brake for braking;
A crank 25 fixed to the other end is a connecting rod that connects this crank to the end of the rod 16. On the other hand, the reciprocating cart 4 includes a first cart 31 and a second cart 3.
It consists of 2. The first truck 31 is attached to the rail 3 by rollers 33a so as to be freely movable. 1st
At the lower end of a shaft 34 rotatably supported around the vertical axis of the truck 31, there is provided a distal end 12a of an arm 12.
is fixed to the upper end of the shaft 34, and a gear 35 is fixed to the upper end of the shaft 34. On the upper surface of a gear 36 that is pivotally supported by the first truck 31 and meshes with this gear 35, there are two parallel swing levers 37a and 37b (generally referred to as swing levers 37) that face each other with the central axis of the gear as an axis of symmetry. ) is fixed. Further, the second cart 32 is also attached to the rail 3 by rollers 33b so as to be freely movable. This second cart 32 includes two parallel guides 38a and 38b (generally referred to as guides 38).
is fixedly installed, and a threaded rod 3 is installed in the center of this guide.
9 is rotatably mounted by a bearing 40. A block 41 is screwed onto the threaded rod 39 and is guided by the guide 38 to be slidable in the longitudinal direction of the guide. A roller 4 is attached to the lower end of a shaft 42 that protrudes from the center of the lower surface of the block and passes through an elongated hole bored in the second truck 32 between the guides 38a and 38b.
3 is rotatably mounted, and this roller engages with the inner surfaces of two swing levers 37a, 37b of the first truck. 44 is a handle for moving the block 40, which is rotatably attached to the second cart 32;
The handle 44 and the threaded rod 39 are connected by a universal joint 45. Furthermore, the fifth
In the figure, 46 is a straight line passing through the center N of the gear 36 (that is, the center of rotation of the swing lever 37) and extending in the longitudinal direction of the rail 3, and P is the center line 4 between this straight line and the guide 38.
The point on the second truck 32 that is the intersection with 7 is shown. In addition, in FIG. 2, the reciprocating cart 4 shown by a solid line is stopped at a position near the press on the front side, and the dashed line 48 shows a state where the crank 24 has rotated 180 degrees and stopped at a position near the press on the rear side. A reciprocating trolley is shown. Further, in FIG. 5, the left side shows the reciprocating cart 4 stopped on the front side near the press, and the right side shows the reciprocating cart 4 stopped on the rear side near the press. (The same applies to other figures below.) The guide 38 is attached to the second truck 32 so that the center line 47 of the guide 38 coincides with the center line 49 of the swinging lever 37 when the swing lever 37 is stopped near the press on the rear side. It is permanently installed. (See FIG. 5) A cover plate 50 is fixed to the second truck 32, and has a plurality of cylinders 52 to which nests 51 for supporting the pressed product W are attached. Note that this cover plate 50 may be attached to the second truck 32 so as to be movable up and down using a known lifter.

In the apparatus having the above configuration, as shown in FIGS. 2 and 5, the center Q of the roller 43 is set at a distance l from the point P on the second truck, and the electric motor 18 with a reduction gear is operated. When the crank 24 is rotated by 180 degrees, the drive mechanism 5 is driven by the rod 16, and the arm 12 swings about the center line 53 passing through the center of the fixed gear 7 as an axis of symmetry, and the reciprocating carriage 4 is moved on the rail 3. go back and forth. At this time, as shown in FIG.
When moving in this direction, the arm 12 rotates clockwise relative to the first cart 31 when viewed from above, and this rotation causes the swing lever 37 to move through the gears 35 and 36.
rotates counterclockwise by an angle of 2α, so the second
The truck 32 is L=2 l with respect to the first truck 31
It will move further forward toward the press by sinα. Therefore, the cover plate 50 on which the press parts are placed has a stroke S+ together with the second truck 32.
A reciprocating motion of L will be performed. Next, when changing the stroke described above, if the reciprocating cart 4 is stopped at a position closer to the rear press, the center lines 49 and 47 of the swing lever 37 and the guide 38 will overlap, so the handle 44 can be rotated. Block 4
1 can be moved along the guide 38 with a slight operating force, so the center of the roller 43 can be moved by the center N of the gear 36, for example, as shown in the right figure of FIG.
Set it to match the state. In this state, when the drive mechanism 5 moves the reciprocating carriage 4 toward the front side of the press, the guide 38 moves toward the first carriage 31 even if the swinging lever 37 rotates by an angle 2α as the arm 12 swings. The second
The carriage 32 will perform a reciprocating motion with a stroke S equal to that of the first carriage. Of course, it is also possible to set the roller 43 at a position intermediate between A and B in FIG. 5, and the stroke of the second cart 32 can be obtained in accordance with the set position. In addition, as shown in FIG. 5C, the center Q of the roller 43 is
6 may be set at a position beyond the center N of the second carriage 32, in which case the stroke of the second carriage 32 is S'=S-
L', and a shorter stroke than S can be obtained.
In any case, regardless of stroke adjustment, the rear stopping position of the second truck 32 is always the same, and only the front stopping position of the second truck 32 changes, as shown in FIG. This makes it possible to change the reciprocating stroke without changing the stopping position of one of the reciprocating ends. Of course, the inter-press conveyance device 1 can also be used as a device for changing the reciprocating stroke without changing the stopping position on the front side of the second truck 32 by arranging the left and right sides reversed.

In the above embodiment, the gears 35 and 36 are omitted, and the swing lever 37 is directly attached to the upper end of the shaft 34.
may be fixed, and when the swing angle of the arm 12 is relatively small, the same effects as in the above embodiment can be obtained with this configuration.

FIG. 6 shows a second embodiment of the present invention, in which a guide 61 is fixed to the second truck 32 so as to be orthogonal to the straight line 46. In this case, as is clear from FIG. The stroke of the two carriages 32 can be adjusted so that the stop positions of both the front press and the rear press are moved closer to or farther apart by an equal amount M or M'. In this case, the stroke can be easily adjusted near the center of the stroke where the directions of the swing lever 37 and the guide 61 match, as shown in the figure.

FIG. 7 shows a third embodiment of the present invention, in which the same or equivalent parts as in FIGS. 1 to 5 are given the same reference numerals. In this embodiment, the swing levers 37a, 3 fixed to the gear 36 of the first embodiment are
7b to slidably guide the block 41,
Bearing plates 71 and 72 fixed to both ends of the swing lever
The screw rod 39 is rotatably supported by the screw rod 39, and this screw rod is screwed into the block 41. Further, a roller 43 supported by a shaft 42 projecting from the center of the upper surface of this block is engaged with the inner surfaces of two guides 38a and 38b fixed to the second truck 32 of the first embodiment. Reference numeral 73 denotes a handle for moving the block, which is fixed to one end of the threaded rod 39.

That is, this embodiment differs from the first embodiment only in that the swing lever 37 is attached to the block 41, and the guide 38 is the engagement target of the roller 43 (opposite to the first embodiment). By changing the distance l between the center Q of gear 43 and the center N of gear 36, the stroke of second truck 32 can be adjusted, and the same effects as in the first embodiment can be obtained. Also, as shown in Figure 6, the guide 38
By arranging , the same effects as in the second embodiment can be obtained.

The present invention is not limited to the above-described embodiments; for example, if the threaded rod 39 for driving the block is operated by an electric motor, the stroke can be adjusted more quickly and easily. Further, in each of the above embodiments, the position of the roller 43 is adjusted by moving the block 41 guided by the guide 38 or the swinging lever 37 using the threaded rod 39. Although the stroke of the truck can be easily and continuously adjusted, if the position of the rollers is to be adjusted discontinuously, the blocks 41 can be moved to a predetermined number of blocks on the guide 38 or the swing lever 37. It is also possible to directly attach and detach it to the position using a clamp mechanism or other means. Further, in the above embodiment, the position of the roller 43 is adjusted with the directions of the swing lever and the guide aligned, but the adjustment is possible even if the directions of the swing lever and the guide are misaligned. However, at this time, the second truck 32 will move relative to the first truck 31 during this adjustment. Further, in each of the above embodiments, the first truck 31 and the second truck 31
The second cart 32 is moved along the common rail 3 with the cart 32, but the second cart 32 is moved along the common rail 3 with the first cart 32.
It may be placed on 1 in a movable or slidable manner.

Moreover, in the above, the first cart 31 is driven and the swinging lever 3 is
The arm 12 of the linear drive mechanism 5, which is a combination of a spur gear and an arm, is used as the swing arm for indirectly or directly swinging the drive mechanism 7 or 61, but other types of drive mechanisms for reciprocating drive may be used. The present invention is also applicable when using a swinging arm such as the one shown in FIG.

As explained above, the present invention includes a first truck reciprocally driven by a swing arm, a second truck supported movably relative to the first truck, and a second truck pivotally supported by the first truck. A swinging lever driven by a swinging arm, a guide fixed to the second truck, and a connecting body that is attached to the guide or swinging lever so that its mounting position can be changed and engages with the swinging lever or guide. Since the object is supported by the second cart, the reciprocating stroke of the second cart for supporting the object can be easily made by changing the attachment position of the coupling body to the guide or swing lever. Moreover, the reciprocating stroke can be changed without changing the stopping position of one of the reciprocating ends of the second truck.

[Brief explanation of the drawing]

FIG. 1 is a (front) view explaining the conveying process of the inter-press conveying device, FIG. 2 is a partially cutaway plan view of the inter-press conveying device showing the first embodiment of the present invention, and FIG.
4 is a sectional view taken along line BB, and FIG. 5 is a (plan) view explaining stroke adjustment.
FIG. 6 is a view corresponding to FIG. 5 showing a second embodiment of the invention, and FIG. 7 is a plan view of essential parts showing a third embodiment of the invention. 1... Inter-press transfer device, 3... Rail, 5...
... Drive mechanism, 12 ... Arm, 31 ... First cart, 32 ... Second cart, 34 ... Shaft, 35 ... Gear, 36 ... Gear, 37 ... Rocking lever, 38 ...
...Guide, 39...Threaded rod, 41...Block,
42... shaft, 43... roller, 61... guide.

Claims (1)

[Scope of Claims] 1. A first truck that is reciprocated by a swinging arm, a second truck that is supported to be movable relative to the first truck, and a second truck that is pivotally supported by the first truck and that swings. The second truck includes a swing lever driven by an arm, a guide fixed to the second truck, and a connecting body that is attached to the guide so that its mounting position can be changed and engages with the swing lever. A reciprocating conveyance device characterized in that an object to be conveyed is supported by. 2. A reciprocating conveyance device according to claim 1, wherein the connecting body has a roller supported pivotally on a block guided by a guide, and the roller is engaged with a swing lever. 3. The reciprocating conveyance device according to claim 2, comprising a threaded rod for moving the block screwed into the block. 4. A first truck that is reciprocated by a swinging arm, a second truck supported so as to be movable relative to the first truck, and a rocker that is pivotally supported by the first truck and driven by the swinging arm. A movable lever, a guide fixed to the second truck, and a connecting body that is attached to the swing lever so that its mounting position can be changed and engages with the guide, and supports the conveyed object by the second truck. A reciprocating conveyance device characterized by: 5. The reciprocating conveyance device according to claim 4, wherein the connecting body has a roller pivotally supported on a block guided by a swing lever, and the roller is engaged with the guide. 6. The reciprocating conveyance device according to claim 5, comprising a threaded rod for moving the block screwed into the block.