JPH0349700B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a conveyance device that uses a transfer bar to convey a shaft workpiece from one station to the next station.

(Prior art) This type of shaft workpiece conveying device reciprocates a transfer bar provided almost horizontally between a plurality of stations in the vertical direction and the longitudinal direction, and supports the shaft workpiece by the transfer bar. The workpiece is sent from one station to the next station, and in the conventional method, a workpiece support bracket is fixed at a position corresponding to each station on the transfer bar, and the upper surface of this workpiece support bracket (a support recess is provided as necessary). Both ends of the shaft work were supported by
Publication No. 33586). In such prior art, the axis of the shaft workpiece supported by the work support bracket is vertically shifted due to the diameter of the support portion of the shaft workpiece. Therefore, when machining shaft workpieces with different diameters, the workpiece support bracket must be replaced each time, requiring extra effort for setup changes.

(Object of the Invention) The present invention reduces the above-mentioned labor by clamping the shaft workpiece with a pair of clamp members that move in opposite directions, and further has a simple and compact structure that makes it easy to hold the shaft workpiece when clamping. It is an object of the present invention to provide a shaft workpiece conveyance device with less fear of interference.

(Structure of the Invention) In order to achieve the above object, the present invention provides a shaft work transfer device of this type, in which a clamping device main body is fixed at a position corresponding to each of the stations on the transfer bar, and A reciprocating shaft passing through each of the clamp device bodies is provided so as to be movable along the transfer bar, and the reciprocating shaft is reciprocally driven by a clamping cylinder installed on the transfer bar, and the first actuating member is attached to each of the clamp device main bodies, respectively. The movable shaft is slidably supported in the longitudinal direction, and is coaxially slidably passed through each of the first actuating members, and is provided at one end of each of the first actuating members and a part of the forward and retractable shafts outside of the first actuating member. A spring is interposed between each spring receiving member, and the spring causes the other end of each first actuating member to elastically come into contact with each corresponding contact member provided on a part of the advance/retreat shaft. a second actuating member is slidably supported on each of the clamp device bodies in a direction above and parallel to each of the first actuating members; racks are formed along the sides, and a pinion is rotatably supported on the clamping device main body at an intermediate position between the two operating members so as to be rotatable about an axis perpendicular to the two operating members, and each of the racks is meshed with each of the pinions. Each one of a pair of clamp members facing each other is fixed to the ends on the same side of each of the first and second actuating members, and a horizontal clamp groove is formed in at least one of the opposing surfaces of the pair of clamp members. , and the shaft workpiece is clamped by the pair of clamp members via the clamp groove.

(Effects of the Invention) According to the present invention, the shaft workpiece can be supported on the transfer bar at the same axis center height even if the diameter of the support part of the shaft workpiece is different. However, there is no need to replace the workpiece support bracket. In addition, since each clamp device is actuated by a common forward and backward axis via a spring, the structure is simple, and even if there is an error in the adjustment of each clamp device or the diameter of each shaft workpiece, all clamp devices can operate all shaft objects. Workpieces can be held securely. Further, the advance/retreat shaft coaxially passes through the first actuating member, and a spring for absorbing the error is provided outside one end of the first actuating member, and the first and second actuating members are connected to each other from a rack and a pinion. Since the shaft workpiece is held between the clamp members at one end that are axially apart,
The structure of each clamping device becomes simple and compact, and interference between the clamping devices of the shaft workpiece is eliminated.

(Embodiment) First, the outline of the embodiment shown in FIGS. 1 to 3 will be explained. The transfer bar 20 provided between a plurality of processing stations S is moved by a vertical movement mechanism operated by a lift cylinder 17. It is reciprocated in the vertical direction and is also reciprocated in the longitudinal direction by the transfer cylinder 21. A clamp device 30 is provided at a position corresponding to each station S on the transfer bar 20. Each clamp device 30 has a first actuating member 32 and a second actuating member 33 which are interlocked and coupled to each other so as to move in opposite directions via a pinion 34, and each actuating member 32, 33 has a shaft work W. A pair of clamp members 3 to be held together
6 and 37 are fixed. Each clamp device 3
0 first actuating member 32 is the clamp cylinder 23
The clamp members 36 and 37 of each clamp device 30 are connected to a reciprocating shaft 24 that reciprocates, and the clamp members 36 and 37 of each clamp device 30 approach and separate at the same time by the reciprocating movement of the reciprocating shaft 24. The clamping of the shafted work W by the clamp members 36 and 37 is performed via horizontal clamp grooves 36a and 37a provided on the opposing surfaces of the clamp members 36 and 37, and the first actuating member 32 is connected to the forward and backward shaft 24 during clamping. The force is transmitted through the spring 26.

Next, each part will be explained in detail. As shown in FIG. 1, the fixed portion of the apparatus of this embodiment consists of a bed 10, a bracket 11 on its side, a fixing base 12 on the bed 10, and a beam 12a. The vertical movement mechanism has a plurality of swinging arms 14 that are pivotally supported by beams 12a via a pivot 13, and a transfer bar 20 is supported by a roller 15 at the upper end so as to be movable in the longitudinal direction, and the lower end is supported by a connecting rod 16. Link. The tip of the piston rod 17a of the lift cylinder 17, which is pivotally supported on the bracket 11 by the pivot pin 18, is connected to the connecting rod 16, and the lift cylinder 17 is operated from the lowered state shown in FIG. 1 to move the swing arm 14 to the right. When the transfer bar 20 swings around, the transfer bar 20 rises. On the other hand, the tip of the piston rod 21a of the transfer cylinder 21, which is pivotally supported on the bracket 11 by the pivot pin 22, is pivotally supported on one end of the transfer bar 20, so that the transfer cylinder 21 is pivoted to one end of the transfer bar 20, and the transfer cylinder 21 is pivoted to the bracket 11 by the pivot pin 22. When the cylinder 21 is actuated, the transfer bar is reciprocated in the longitudinal direction.

As shown in FIGS. 2 and 3, the clamping device 30 includes a clamping device main body 31 fixed on the transfer bar 20, a first operating member 32, a second operating member 33, and a pinion 34 supported by the clamping device main body 31. The shaft-shaped first actuating member 32 is supported by penetrating the clamp device main body 31 in the longitudinal direction of the transfer bar 20, and can be axially moved relative to the clamp device main body 31, but rotation is controlled by a sliding key (not shown) or the like. be bound by. Above the first actuating member 32, parallel to the first actuating member 32, a shaft-shaped second actuating member 33 is supported by the clamping device main body 31, and this is also able to pivot relative to the clamping device main body 31, but its rotation is restricted. . Racks 32a and 33a are provided on opposite sides of the first and second actuating members 32 and 33, respectively, and mesh with the pinions 34 located therebetween.
4 is rotatably supported by the clamp device main body 31 via pivot shafts 34a on both sides so as to be rotatable around a horizontal axis perpendicular to each operating member 32, 33. Thus, the first and second actuating members 32 and 33 are interlocked so that they move in opposite directions at the same speed. 1st
A stay 35 is erected and fixed above one end of the actuating member 32 to face the same end of the second actuating member 33, and a pair of clamp members 36, 37 are provided at each opposing part.
to be fixed. V-shaped clamp grooves 36 are provided in the opposing surfaces of the clamp members 36 and 37, respectively, along the horizontal direction.
a, 37a are provided. Covers 29 and 29a are provided on both sides of the clamp device main body 31.

Each clamping device 30 is operated simultaneously by a reciprocating shaft 24 connected to each first operating member 32 . Second
As shown in the figure, the forward and backward shafts 24 are connected to the first to third rods 24.
a, 24b, 24c, each first rod 24
a passes through the coaxial hole 32b of each first actuating member 32 in a axially movable manner, and the end of each first rod 24a is screwed to the end of the second rod 24b to connect the next first rod 24a.
4a. As shown in FIGS. 1 and 2, a clamping cylinder 23 is provided at the left end of the transfer bar 20 via a plate 20a.
The left end of the first rod 24a on the leftmost side is connected to the piston rod 23a of the clamping cylinder 23 via the third rod 24c, and the entire forward and backward shaft 24 is reciprocated in the longitudinal direction of the transfer lever 20 by the operation of the clamping cylinder 23. do. The first rod 24a of the forward/backward shaft 24 and the first actuating member 32 are connected by an abutting member 25 and a spring 26.
That is, as shown in FIG. 2, the abutting member 25 is fixed to the first rod 24a located on the left side of the first actuating member 32, and the contact member 25 is fixed to the right side of the first actuating member 32 between it and the second rod 24b. Spring receiving members 27, 28
A compression spring 26 is provided via the first actuating member 32.
is applied to the contact member 25 side. When the advance/retreat shaft 24 moves to the right due to the operation of the clamp cylinder 23, the first actuating member 32 is pushed by the contact member 25 and moves to the right, and at the same time, the second actuating member 33 moves to the left via the pinion 34. A pair of clamp members 3
6 and 37 are separated from each other. When the advance/retreat shaft 24 moves to the left, the first actuating member 32 is pushed by the spring 26 and moves to the left, bringing the clamp members 36 and 37 closer to each other, but after clamping the shaft work W by the clamp grooves 36a and 37a, First and second actuation members 3
2 and 33 are stopped, and the forward/backward shaft 24 moves the remaining stroke, causing the spring 26 to flex. Therefore,
Even if the timing of clamping the workpiece by each clamping device 30 is different due to a dimensional error in each part or a difference in the diameter of the supporting portion of the shafted workpiece W, each clamping device 30 reliably clamps the shafted workpiece W. In addition, the clamping grooves 36a and 3 are used to clamp the shaft workpiece W.
7a, even if the diameters of the support portions are different, the axial position of the support portions can be maintained at the same height with respect to the transfer bar 20.

FIG. 1 shows the standby state of this shaft workpiece conveyance device. In this state, the clamping cylinder 23 moves the clamping member 24 to the right when advancing and retracting, and each clamping member 36, 37
are in an isolated state, machining is performed at each machining station S, and unmachined shaft workpieces are supplied to a workpiece supply position P. When the machining at each machining station S is completed, the lift cylinder 17 is activated to raise the transfer bar 20, and then the clamp cylinder 23 is activated to raise each clamp device 3.
0 is the workpiece supply position P and each processing station S
A shaft workpiece W supported by a center support member Sa (device shown in FIG. 3) is held between the two. Next, the center support member Sa moves backward, and the transfer bar 20 is sequentially lowered by the lift cylinder 17, moved forward by the transfer cylinder 21, and raised again by the lift cylinder 17 to move each shaft workpiece to the next processing station S. send. Each processing station S
The center support member Sa moves forward and each shaft workpiece W
After the clamping cylinder 23 is activated, each clamping device 30 releases the clamping of the shaft workpiece W, and then the transfer bar 20 is sequentially lowered by the lift cylinder 17 and retreated by the transfer cylinder 21 to move to the first Return to the standby position shown in the figure. Machining is performed at each station S. Although the above embodiment has been described as a ground-and-carry system, it is also possible to perform the process using a lift-and-carry system or the like. Furthermore, the support at the processing station S is not limited to the center support method as shown, but may also be a chuck gripping method, and in that case, the processing at the processing station S can include processing other than turning, such as flange drilling. Clamp members 36, 3
The clamp groove 7 may have a shape other than V-shape, and the axial position of the shaft workpiece W can be maintained at the same height by providing it only in either one of the clamp members 36 and 37. Furthermore, it is also possible to provide idler stations between each processing station if necessary.

(Effects of the Embodiment) In the above embodiment, even if the diameters of the supporting parts of the shafted workpieces W are different, the shafted workpieces can be supported on the transfer fiber 20 at the same axis center height. Even when processing the workpiece W, there is no need to replace the workpiece support bracket when changing the setup. Further, a forward and backward shaft 24 that is pivoted by one clamp cylinder 23 is passed through each first actuating member 32, and a spring 2 is provided on the outside of one end thereof.
Since all the clamp devices 30 are operated through the clamp device 6, the operation mechanism of the clamp device 30 is simplified and the cost of the device can be reduced. Further, the interlocking mechanism of the first and second actuating members 32, 33 is constituted by racks 32a, 33a and pinion 34, and a pair of clamp members 36, 37 provided at one end axially away from the racks 32a, 33a are used to hold the shaft workpiece W. Since they are clamped, each clamping device has a simple and compact structure, and there is no interference between the shaft workpiece W and the clamping device. Furthermore, even if there is a dimensional error in each part or a difference in the supporting part diameter of the shafted workpiece W, all the shafted workpieces W can be securely clamped by the clamping device 30, so even if there is a difference in the diameter of the supporting part of the shafted workpiece W, all the shafted workpieces W can be reliably clamped by the clamping device 30. In this case, two types of shaft workpieces can be continuously fed and machined.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a side view showing the whole, FIG. 2 is an enlarged side sectional view showing the main part, and FIG. 3 is a part showing the main part. FIG. Explanation of symbols, 20...Transfer bar, 23...
...Clamp cylinder, 24...Advance/retreat axis, 25...
... Contact member, 26 ... Spring, 27 ... Spring receiving member, 31 ... Clamp device main body, 32 ... First actuation member, 33 ... Second actuation member, 32a, 33a
...Rack, 34...Pinion, 36,37...
Clamp member, 36a, 37a...clamp groove,
W...Shaft work, S...Station.

Claims (1)

[Claims] 1 A transfer bar installed almost horizontally between a plurality of stations is reciprocated in the vertical and longitudinal directions, and the transfer bar supports the shaft workpiece and transports the shaft workpiece from one station to the next station. In the apparatus, a clamping device main body is fixed at a position corresponding to each of the stations on the transfer bar, and a forward and backward axis passing through each of the clamping device main bodies is provided to be movable along the longitudinal direction of the transfer bar. The forward and backward shafts are reciprocated by a clamp cylinder installed on the transfer bar, and each of the clamp device bodies supports a first actuating member slidably in the longitudinal direction, and the forward and backward shafts are attached to each of the first actuating members. A spring is interposed between one end of each first actuating member and each spring receiving member provided on a part of the advance/retreat shaft outside the first actuating member. 1. The other end of the first actuating member is brought into elastic contact with each abutting member provided on a part of the advance/retreat shaft, and
A second actuating member is slidably supported by each of the clamp device bodies above and parallel to the actuating member, and each of the first and second actuating members has a rack along opposite sides thereof. At the same time, a pinion is rotatably supported on the clamping device main body at an intermediate position between the two actuating members so as to be rotatable about an axis perpendicular to these two actuating members, and each of the racks is engaged with each of the pinions. Each one of a pair of clamp members facing each other is fixed to the end of the same side of the member, and a horizontal clamp groove is provided in at least one of the opposing surfaces of the pair of clamp members, and the clamp groove is provided with a horizontal clamp groove. A shaft workpiece conveying device characterized in that the shaft workpiece is held between the pair of clamp members via the clamp members.