JPS639398Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a conveyance device for conveying a workpiece.

[Prior Art] Conventionally, when transporting many types of workpieces using, for example, a lift-and-carrier transport device, the positions of a pair of reference holes formed in the workpieces and the position of the reference holes are determined depending on the type of the workpieces. Because of the different pitches, it becomes difficult to position and transport the workpiece using a dowel pin, and it becomes necessary, for example, to position and transport the workpiece by pressing one side of the workpiece against a reference metal.

However, if this is done, the reference hole of the workpiece will not be at a constant position at the forward end of the transport (that is, the position of the reference hole will vary depending on the type of workpiece), and depending on the workpiece, the position of the reference hole will not be constant at the forward end of the transport. There was a drawback that the positioning knob pins provided at each station could not be inserted into the reference holes.

[Purpose of invention]

In view of the above-mentioned conventional drawbacks, the present invention allows the transfer device to absorb deviations in the reference hole of the workpiece due to changes in the type of workpiece, and enables the transfer of many types of workpieces with a common transfer device. It is an object of the present invention to provide such a conveying device.

[Structure of the idea]

The present invention provides a conveyance device that sequentially conveys a workpiece having a reference hole in a fixed conveyance direction from one station to another, which is equipped with a knock pin that is installed on a fixed support stand and engages with the reference hole of the workpiece. a workpiece pedestal; a transfer bar that conveys the workpiece supported by the workpiece pedestal in the conveyance direction;
A movable member connected to the transfer bar to be regulated in the transport direction and mounted to the support base so as to be able to reciprocate in the transport direction, and a stopper for regulating the forward end position of the movable member are configured to be movable. The invention is characterized by comprising a forward movable stopper device.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show an embodiment of the present invention, and in these figures, reference numeral 1 denotes a fixed support stand, and 2 parts are connected to each other so as to bridge the front side wall 1a and the rear side wall 1b of the support stand 1. Book pilot bars 2 and 3 are fixedly installed. the pilot bar 2,
The movable member 4 through which 3 passes is a transfer cylinder 5
When activated, it is possible to move forward (direction a) or backward (direction b) through the piston rod 6 while being guided by the pilot bars 2 and 3. However, the first
Since the state shown in the figure shows the most retracted position of the movable member 4, it cannot move rearward from the state shown in this figure. A vertically long slit is formed in the movable member 4 on a surface facing a transfer bar 7, which will be described later. A low cylindrical protrusion having a diameter equal to the horizontal length of the slit is formed on the transfer fiber 7, and the transfer fiber is held by the movable member so as to be slidable in the vertical direction.

When the movable member 4 moves forward or backward as described above, the transfer bar 7 also moves integrally in the same direction. However, the movable member 4 moves forward,
Although the transfer bar 7 can only move backward and cannot move vertically, the transfer bar 7 is configured so that it can also move vertically as described later.

The transfer bar 7 is constructed of two plates separated by a certain distance as shown in FIG. The mounted support roller 9 is rotatably engaged. The swing arms 8, 8A swing around the pin 12 in the direction of the arrow as the piston rod 11 reciprocates when the lifting cylinder 10 is activated. The swinging causes the transfer bar 7 to move up and down via the roller 9. Here, since the swing arms 8 and 8A are pivotally connected by one connecting rod 13, they can swing in the same direction at the same time. Incidentally, reference numerals 14, 15, and 16 are brackets, and 14 is the lifting cylinder 1.
For pivotally holding one end of 0, 15, 16
is fixed to the support base 1 to hold the pin 12.

The support stand 1 has a forward movable stopper device A.
and a backward movable stopper device B are provided. The former A is for regulating the stopping position at the forward end when the movable member 4 moves forward as shown by the two-dot chain line, and is fixed to the support base 1 as is clear from FIGS. 1 and 3. A servo motor 20 supported by the blocks 17 and rotating the screw shaft 19, and a guide rod 21 bridged between the support blocks 17 and 18 rotate the screw shaft 19 back and forth. It consists of a movable block 22 that can freely reciprocate in the direction of the arrow shown in the third figure, a stopper 23 fixed to the block 22, and a deceleration switching valve 24 attached to the movable block 22.
In the deceleration switching valve 24, the movable member 4 is connected to the stopper 23.
Immediately before the dog 25 comes into contact with the movable member 4, the other end inclined portion (see FIG. 1) of the dog 25, which has one end fixed to the movable member 4, aligns the vertically movable operating portion 24a of the switching valve 24 with the inclined portion of the dog 25. The downward pressure of the operating portion 24a controls the transfer cylinder 5 to decelerate the forward speed of the movable member 4, and the movable member 4 impacts the stopper 24. It is provided to prevent contact with the By providing the movable stopper device A, the position of the stopper 23 can be adjusted in the front-rear direction. With such a forward movable stopper device A, the workpiece W can be transported to a position where its reference hole coincides with the dowel pins 36 and 37 on the workpiece pedestal 35, regardless of the change in the type of workpiece.

On the other hand, the latter retreat-side movable stopper device B is for regulating the stop position of the movable member 4 when it retreats from the position shown by the two-dot chain line in FIG.
As is clear from FIGS. 1 and 4, there is a support block 26 fixed to the support base 1, a servo motor 28 that is supported by the block 26 and rotates the screw shaft 27, and a servo motor 28 that is slidably inserted into the support block 26. The stopper 29 is attached to the stopper 29 and reciprocates when the screw shaft 27 rotates. By providing the movable stopper device B in this way, the position of the stopper 29 can be adjusted in the front-rear direction.
Such a retreating side movable stopper device B allows the workpiece W to be held in a fixed positional relationship by the workpiece support 30 on the transfer bar 7 at the retreating end position, regardless of the change in the advancing end position by the advancing side movable stopper device A.
can be supported.

Workpiece support stands 30 are fixed on the transfer bar 7 at regular intervals (pitch) P, and each support stand 30 includes a clamping cylinder 31.
are provided for each. The operation of the cylinder 31 allows the clamp 32 to move in the left-right direction in FIG. 1, that is, in the front-back direction. On the workpiece support stand 30, there are a vertical part 33a and a horizontal part 33.
A reference metal 33 consisting of a horizontal portion 33b is fixed, and the cross-sectional shape of the horizontal portion 33b is formed into a semicylindrical shape with a curved upper side.

Two workpiece holders 3 are provided on the upper surface of the support 1.
4 and 35 (see FIG. 2) are fixed at a fixed interval L. A main knock pin 36 and a sub-knock pin 37 are provided on one of the pedestals 35 along the transfer fiber 7. However, the sub-knock pin 37 is provided so as to be movable forward and backward by a motor 38. Further, two seat pads 39 are arranged between both the knock pins 36 and 37, and the seat pad 39 on the side of the sub-knock pin 37
is movable together with the sub-knock pin 37. Further, as shown in the second figure, two seat pads 40 are also provided on the workpiece holder 34, and these seat pads 39, 40 have their upper surfaces accurately finished and are placed on the workpiece holders 34, 35. Workpiece W
Regulates the bottom position of the

Here, the workpiece holders 34 and 35 are fixed to the upper surface of the support stand 1 as described above, and if this position is defined as the second station 2st,
A third position is placed at a distance of P before and after the 2nd st.
There are station 3st and station 1 1st.
The 3st and 1st also have workpiece holders 34 and 35 similar to the 2st.
is fixed on a support (not shown). Also, the workpiece support 3 fixed to the transfer bar 7
A support stand similar to 0 is provided at a position P apart.

In such a configuration, the workpiece W is sequentially moved from the front station (not shown) to the first station 1st, second station 2st, third station 3st, and further to the rear station (not shown).
To describe the operation of the device, assuming that the first to third stations shown in the figure are processing stations, first, it is assumed that the processing of the workpiece W at each station has been completed, and the 1. To raise the transfer bar 7, which is at the lowest position in the illustrated state, use the lifting cylinder 10.
is activated to move the rod 11 forward and raise the support roller 9. As a result, the transfer bar 7 rises (→ in Fig. 5), and the workpiece pedestal 3
The semi-cylindrical curved surface of the upper surface of the horizontal portion 33b of the reference metal 33 and the upper surface of the workpiece support stand 30 contact the lower surface of each workpiece W placed astride the transfer bar 7. When the workpiece W is raised, each workpiece W is raised from the state shown in the first figure, and finally the reference hole drilled in the workpiece W and both the notch pins 36 and 37 are disengaged. Immediately after this engagement is released, the transfer bar 7 reaches the highest position and stops rising. When this upward movement is stopped, the clamping cylinder 31 is activated, and the clamper 3 moves rearward to clamp the side surface of the workpiece W with the vertical portion 33a.

Next, when the transfer cylinder 5 works and the rod 6 and movable member 4 begin to move forward, the transfer bar 7 and each workpiece W move forward together, and the front side of the movable member 4 comes into contact with the stopper 23, causing each workpiece to move forward. Workpiece W is transported forward by P (Fig. 5→
).

Next, the lifting cylinder 10 operates to rotate the swing arms 8, 8A clockwise, and the transfer bar 7 descends to the lowest position (→ in FIG. 5).
As a result of this lowering, each workpiece W is placed on the workpiece holders 34 and 35 of the adjacent station, and the reference holes on the lower surface of the workpiece W are engaged with the respective knock pins 36 and 37.

Finally, the transfer cylinder 5 operates again to move the movable member 4 rearward, and the movable member 4
moves until it comes into contact with the rear stopper 29, and as a result, the transfer bar 7 and the workpiece support 30
returns to the original state as shown in Figure 1 (→ in Figure 5)
).

In addition, when the workpiece W to be transported is changed to one with a different reference hole position, the workpiece support stand 3
The stoppers 23,
Shift the position of 29 by the same amount. Further, if the pitch between the pair of reference holes is different, the position of the sub-knock pin 37 is also changed accordingly.

As a result, the position of the moving forward end of the movable member 4, that is, the workpiece support 30, is adjusted to the position of the main knock pin 36.
Even if the type of the workpiece W is changed according to the position of the reference hole into which the workpiece W is inserted, the reference hole of the workpiece W is connected to the pair of knock pins 3 at the forward transport end.
6, 37 can be reliably engaged.

This example shows the case where the present invention is applied to a lift-and-carry type conveyance device, but
Alternatively, it may be applied to other methods. For example, as shown in FIG. 6a, a transfer bar 51 is provided so as to be able to reciprocate with respect to the fixed member 50, and the transfer bar 51 is rotatable around the axis of the transfer bar 51 and at the same time integrally moves in the direction perpendicular to the plane of the paper. A reciprocating hollow body 52 is provided, a protrusion 52a is provided on the outer periphery of the hollow body 52, and as shown in FIG. When the body 52 is moved downward in the direction perpendicular to the plane of the paper (that is, in the transport direction), the workpiece W is pressed by the protrusion 52a and is transported in the same direction. Assuming that the distance of the pressure conveyance is P, after moving by P, the hollow body 52 is rotated again as shown in FIG. 6a to release the contact between the protrusion 51a and the workpiece W. If the hollow body 52 is moved upward by P in the direction perpendicular to the plane of the paper, the hollow body 52 will return to its original state.

Even in such other embodiments, the present invention can be achieved by providing a movable stopper device to restrict the forward end position of the transfer bar 51 and the hollow body 52 when they move in the conveyance direction. I can do it.

(Effect of the invention) In this way, the present invention allows the transfer device to absorb the deviation of the reference hole of the workpiece due to changes in the type of workpiece, and therefore allows the transfer device to handle many types of workpieces. Not only can the workpiece be conveyed, but also the workpiece can be positioned using a fixed main knock pin that is free from positional deviation, and there is an advantage in that there is no need to adjust the position of the main knock pin.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is an enlarged plan view of the forward movable stopper device A in FIG. 4
The figure shows the retreating side movable stopper device B in Figure 1 - a sectional view taken along the line, Figure 5 is a conveyance cycle diagram,
FIG. 6 is a sectional view of a main part of another embodiment. DESCRIPTION OF SYMBOLS 1... Support stand, 2, 3... Pilot bar, 4... Movable member, 5... Transfer cylinder, 7... Transfer bar, 10... Lifting cylinder, 13... Connection rod, 20, 28... Servo motor, 23, 29... Stopper, 30... Workpiece support stand, 34, 35... Workpiece pedestal, 36, 37... Knock pin, W... Workpiece (workpiece).

Claims (1)

[Utility Model Claims] (1) A conveying device for conveying a workpiece having a reference hole in a fixed conveying direction one station at a time, comprising: a workpiece support table mounted on a fixed support table and equipped with a knock pin engaging with the reference hole of the workpiece, a transfer bar for conveying the workpiece supported on the workpiece support table in the conveying direction, a movable member connected to the transfer bar and mounted on the support table so as to be movable in the conveying direction and reciprocating in the conveying direction, and a forward-side movable stopper device for movablely restricting the forward end position of the movable member. (2) The forward-side movable stopper device as described in Utility Model Claims 1 comprises a support block fixed to the support table, a servo motor supported by the support block and rotating a screw shaft, a movable block guided by a guide rod mounted on the support block and reciprocating in the forward and backward directions by the rotation of the screw shaft, and a stopper fixed to the movable block.