JPS6225315Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pallet device used to place and transport workpieces in a machine tool.

[Prior art]

In general, machine tools equipped with a pallet changer that rotates a pallet on which a workpiece is placed along an arcuate path and exchanges the pallet with a machine table, The clamper for clamping must have an arcuate shape that matches the arcuate trajectory, and therefore the pallet must also be a special type having an arcuate guide groove.

However, since such pallets are special, even if they are effective for the machine tool in question, they cannot be used for other machine tools, and have the disadvantage of lacking in versatility.

[Purpose of invention]

In view of the above-mentioned conventional drawbacks, the present invention has been proposed by forming a special guide groove inside the adapter by engaging the adapter so as to be able to slide relative to the linear guide groove formed inside the standard pallet, and furthermore, by forming a special guide groove inside the adapter. By providing a coupling means for separably coupling a standard pallet and an adapter, it is an object of the present invention to provide a versatile pallet device that can be used in various machine tools.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the - line in FIG. In these figures, the symbol Pc represents a pallet changer, H represents a conveyor, and M represents a machine table. An arc-shaped support member 3 is fixed on a support plate 2 fixedly mounted on a support frame 1 (FIG. 2). Further, other arc-shaped support members 4 and 5 are fixed on the machine table M,
When the table M is in the position shown, the three parties 3, 4,
5, it has a substantially circular shape. The support members 4 and 5
An indexing table 6 is installed between them, and an arc-shaped clamper 7 for holding and clamping the pallet is provided inside the indexing table 6.

A swing drive member 8 is provided at the center of the arc-shaped support member 3, and the member 8 engages engagement blocks 9, which are protruded from the standard pallets P' and P when replacing the pallets.
It is designed to hold 10.

Hereinafter, the position of the pallet P' indicated by the solid line in FIG. 1 will be referred to as the "pallet exchange position", and the position of the pallet P' indicated by the two-dot chain line will hereinafter be referred to as the "pallet standby position".

In the standard pallets P and P', there is a linear first pallet.
A guide groove 11 (FIGS. 2 and 3) is formed, and it is slidable along this guide groove 11 in a direction perpendicular to the plane of the paper in FIG. 2, and has an arcuate second guide groove 12 inside. An adapter 13 is attached.
The upper part 3a of the previously described arc-shaped support member 3 is fitted into the space in which the guide groove 12 is formed, and a plurality of support rollers 1 are provided on both sides of the upper part 3a.
4, and a plurality of guide rollers 15 are provided at both ends of the upper surface of the base 3b. The support roller 14 serves to support the adapter 13, the pallet P, and the workpiece placed on the pallet P, and the guide roller 15 supports the pallet P and the adapter 13 in an arcuate shape as described later. Provides guidance when moving along the support member 3.

The second guide groove 12 is formed as a special arc-shaped guide groove, but this is necessary in order to match the shape of the support member 3, and other shapes may not be used. For example, it may be a narrow linear guide groove.

A spring 19 is inserted into the blind hole 16 drilled in the pallet P, and the spring 19 has one end engaged with a lid 17 and the other end engaged with a positioning pin 18. A coupling pin 20 is installed in a direction perpendicular to the positioning pin 18, and the tip 1 of the positioning pin 18
8a engages with the outer circumferential groove 20a of the coupling pin 20, so that the pallet P and the adapter 13 are integrated. The upper part of the coupling pin 20 is removably inserted into the hole of the pallet P, and the lower part is inserted into the adapter 13.
It is inserted into the through hole. When a downward tensile force is applied against the urging force of the spring 19 due to the operation described below, the engagement between the tip 18a and the groove 20a is disengaged, and the upper end of the pin 20 is lowered to the position indicated by the two-dot chain line. At this time, the pallet P can be separated from the adapter 13.

A flange portion 20b and a small diameter portion 20c, both of which have a circular cross section, are formed at the lower end of the coupling pin 20 (see FIG. 4). In the pallet standby position, as shown in FIGS. 2 and 4, the engagement shaft member 21
It can engage with a groove 21a provided in the radial direction at the upper end. The engagement shaft member 21 can be moved up and down in the axial direction by supplying and discharging hydraulic pressure into the lower cylinder 22 (FIG. 2 shows a state in which it has moved to the uppermost position).

On the other hand, a blind hole 23 is bored in the lower end surface of the adapter 13 at a position opposite to the coupling pin 20. The upper end of the lower dowel pin 24 can fit into this hole 23 as shown by the two-dot chain line. The lower end of the knock pin 24, which is slidably installed on the support plate 2, is pivoted to the other end of a link 25, one end of which is pivoted to the lower end of the engagement shaft member 21. and link 25
The center portion thereof is pivotally supported by a pin 27 to the lower end of a holding member 26 fixed to the lower surface of the support plate 2. Therefore, by supplying and discharging hydraulic pressure into the cylinder 22, the link 25 swings around the pin 27, and when the engagement shaft member 21 is at the highest position as shown in the figure, the knock pin 24 is at the lowest position. Therefore, the upper end of the knock pin 24 is connected to the hole 2.
3 and is in a disengaged state.

Next, we will discuss the effect.

A standard pallet P with unprocessed workpieces placed on its upper surface is conveyed by the conveyor H shown in Fig. 1,
The pallet is sent to the pallet standby position by appropriate means,
Convex portions 13 on both sides of the adapter 13 that is waiting to be fixed
a (see Fig. 2), the first guide groove 11 of the pallet P
are forced to slide relative to each other. Then, in a state where the adapter 13 is completely accommodated in the first guide groove 11 as shown in FIG. While fixing the pallet P, the knock pin 23 is removed from the adapter 13.

On the other hand, when the machining of the workpiece being machined on the machine table M is completed and another pallet P' on which the machined workpiece is placed is at the pallet exchange position as shown in Fig. When the member 8 works, the pallet P, the connecting pin 20, and the adapter 13 rotate in a counterclockwise direction in FIG. 1 along the arcuate support member 3. In this case, since the engagement shaft member 21 shown in FIG. 2 does not rotate, the pin 2
0 comes off the groove 21a. Simultaneously with the rotation of the pallet P, the other pallet P' located at the pallet exchange position also rotates in the same counterclockwise direction, and eventually the pallet P on which the unprocessed workpiece placed at the pallet standby position is placed is 180 mm. degree and reaches the pallet exchange position, while the pallet P' on which the machined workpiece placed at the pallet exchange position is placed reaches the pallet standby position. Then, the pallet P is clamped to the machine table M, and machining of the unprocessed workpiece placed thereon is started, and at the same time, the shaft member 21 is lowered and the knock pin 24 is raised, and the other pallet P' is moved to the adapter. The standard pallet P' alone is sent to the transport conveyor H and transported to a predetermined location.

[Effect of idea]

As described above, the present invention provides a standard pallet having a linear guide groove of a constant width inside, an adapter that engages with the guide groove so as to be able to slide relative thereto and has a special guide groove inside, and the adapter. Since it is composed of a connecting means that connects the standard pallet in a separable manner, when the adapter is separated, it can be used as a standard pallet, and when the adapter is combined, it can be used as a special pallet. It has an excellent practical effect of being able to
Versatility is greatly increased compared to conventional pallets.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention;
1, FIG. 3 is a bottom view as seen from the direction of FIG. 2, and FIG. 4 is an enlarged sectional view taken along the line - in FIG. 2. 2...Support plate, 3, 4, 5...Circular support member, 7...Clamper, 8...Swivel drive member,
9, 10... Engagement block, 11, 12... Guide groove, 13... Adapter, 14, 15... Roller,
20... Connection pin, 21... Engagement shaft member, 24...
...Notsukupin.

Claims (1)

[Scope of utility model registration request] A standard pallet having a linear guide groove of a constant width inside, an adapter that engages with the guide groove so as to be slidable relative thereto and has a special guide groove inside, and the adapter can be separated into the standard pallet. and a coupling means for coupling the pallet to the pallet.