JPH0722865B2 - Manual pallet changer - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual pallet changer for loading and unloading pallets on a table of a machine tool.

2. Description of the Related Art Conventional techniques and problems to be solved by the invention A conventional pallet changer automatically changes pallets by using a hydraulic cylinder or a motor.

If a hydraulic cylinder or a motor is used, the pallet changer becomes large and heavy, and the manufacturing cost tends to increase. Further, problems may occur with respect to pallet positioning, starting timing, and the like. There was also a problem in terms of maintenance when a failure occurred. Further, in the pallet transfer device disclosed in Japanese Utility Model Laid-Open No. 62-61435, an operator sometimes cannot easily access the table of the machine tool.

In view of the above-mentioned problems, an object of the present invention is to provide a manual pallet changer which is small and lightweight, has few failures, is excellent in operability, and can be manually operated.

The present invention relates to a manual pallet changer for loading and unloading a pallet between a table of a machine tool and a pallet magazine, and a first spherical contact type pallet at the bottom of the pallet.
The caster (24) is provided, the second caster (14) is provided on the leg of the pallet magazine (12), the pallet magazine (12) is connected to the machine tool with the opening / closing joint (13), and the pallet magazine (12) A first guide rail (17) in a predetermined direction of the pallet magazine, and a second guide rail (28) substantially orthogonal to the first guide rail (17) in the other direction of the pallet magazine. 2 guide rails (17,28)
A groove (22) for guiding the first caster (24) is provided on the first guide rail (17, 28), and a pallet is placed on the first and second guide rails (17, 28) so that the first caster (24) and the groove (22) function. The pallet magazine (12) can be replaced by manually moving the pallet, and the pallet magazine (12) can be entirely swung around the fulcrum of the opening / closing joint (13). The gist of the manual pallet changer is characterized in that the second guide rail (28) faces the table of the machine tool when the position (12) is set to the closed position.

The pallet P1, P2, ... Is exchanged between the table 11 and the pallet magazine 12 by moving the working pallet P along the first or second guide rails 17, 28.

Further, the pallet magazine is entirely swiveled around the fulcrum of the opening / closing joint 13, and the worker works near the table (between the pallet magazine and the machine tool table).

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

FIG. 1 shows a manual pallet changer (hereinafter,
FIG. 1 is a top view showing a pallet changer 10). The pallet changer 10 includes a machine tool table 11 and a pallet magazine 12. In addition, in the drawings, a part of the machine tool main body is omitted for simplicity, and the table 11 is illustrated.

The pallets P1, P2, ... Will be described with reference to FIGS. The pallets P1, ... have two rail-shaped legs 8 on the lower surface. The foot 8 has a hook-shaped cross section. A ball caster 24 is provided on the lower surface of the foot 8. A pull tab 7 is fixed to the front of the pallet P1 ,. A collar 6 is fixed to the front part and the rear part of the center of the lower surface of the pallet, thereby forming a recess 9.

The pallet magazine 12 is hinged to the front or side of the machine tool by a hinge or an opening / closing joint 13. The pallet magazine 12 can be entirely rotated (swirl) around a fulcrum of the opening / closing joint 13. The phantom line in FIG. 1 shows how the pallet magazine 12 has swung.

2 and 3 are sectional views taken along lines II-II and III-III in FIG. The pallet magazine 12 has a box shape as a whole and has a leg portion 3
Castors 14 are provided on the.

Guide rails 17 and 28 are provided on the upper surface of the frame 15.
The guide rails 17 are arranged in the longitudinal direction of the pallet magazine 12, and the other guide rails 28 are arranged in the lateral direction.
And both guide rails 17 and 28 intersect in the central part. The distance between the guide rails 17 and 28 corresponds to the distance between the ball casters 24 provided on the pallet. Guide rail 17,2
A V-shaped groove 22 is provided on the upper part of the 8. The depth of the V-shaped groove 22 corresponds to the ball caster 24 provided on the pallet.

While the ball casters 24 are guided by the V-shaped groove 22, the pallet can move smoothly along the guide rails 17 and 28. At the intersection of the guide rails 17 and 28, the pallet is configured to be able to go straight or turn.

A connecting means 29 is provided on the opposite side of the pallet magazine and the opening / closing joint 13 in the machine tool 2. Connection means 29
Has a structure in which two plates are joined by a knob. Next, the table 11 of the machine tool 2 will be described. Usually, a tip guard 5 is provided around the table 11. Seventh,
Figure 8 shows its outline. FIG. 7 is a front view and FIG. 8 is a side view. In FIGS. 7 and 8, parts other than the tip guard 5 are shown in a simplified manner. FIG. 4 is a top view of the table 11 on which the pallet is placed, in which part of the pallet is cut away for easy viewing. FIG. 5 is a front view showing a partial cross section of the table 11, and FIG. 6 is a cross sectional view taken along line VI-VI of FIG.

The table 11 is, for example, an XY table of a machining center, and pallets are exchanged at the position shown in the drawing.

Two brackets 41 are provided on the front surface of the table 11, and the bracket 41 includes rollers 42. bracket
The reference numeral 41 is located almost on the extension line of the guide rail 28 in the other direction, and the pallet can be smoothly moved from the guide rail 28 to the bracket 41. The table 11 is provided with clamp means 43.

The clamp means 43 will be described. A shaft 44 is provided horizontally in the center of the table 11. A grip lever 45 for rotating the shaft 44 is fixed to the shaft 44. An eccentric shaft 46 is fixed to one end of the shaft 44. The amount of eccentricity is shown by d in FIG.

The eccentric shaft 46 is rotatably provided in the clamp base 51. A needle bearing 48 is provided at the center of the eccentric shaft 46, and a housing 47 is provided outside the needle bearing 48. A clamp plate 50 is fixed to the top of the housing 47. Rollers 50a are provided on both upper sides of the clamp plate 50. The clamp plate 50 has a shape and width that fit between the two legs 8 of the pallet P1 ,. A disc spring 60 and a cover 61 are provided on the top of the housing 47.

At both ends of the eccentric shaft 46, a spring pin 49, a block 52,
Pin 53 is provided. The block 52 is pressed downward by a spring 54.

As shown in FIGS. 4 and 6, when the pallet P is clamped by the clamp base, the tip of the pin 53 is inserted into the recess 9 of the pallet.

By rotating the eccentric shaft 46 while holding the grip lever 45, the clamp plate 50 is moved up and down. The clamp base 51 has four convex portions 51a, and the legs 8 of the pallet P are clamped there.

Next, the operation of the pallet changer 10 will be briefly described with reference to FIG.

In FIG. 1, the pallet P1 on which the processed work W1 is placed is clamped on the table. Operate the grip lever 45 to unclap the pallet P1. Pull the pull tab 7 to move the pallet P1 in the direction of arrow B2.

Move the pallet P1 from the rail bracket 41 to the rail 28, and when it reaches the center position of the pallet magazine,
Move P1 in the direction of arrow C2 to the right position. Similarly, slide the pallet P2 on which the unprocessed work W2 is placed in the direction of arrow C2, and move it to the center position. Further, the pallet P2 is slid in the B1 direction and moved onto the table via the rail bracket 41. And grip lever
Operate 45 to clamp pallet P2 on the table.

The pallet P1 and the pallet P2 can be exchanged by the above procedure.

Further, by rotating the pallet magazine as shown by the phantom line in FIG. 1, an operator can enter the front of the machine tool.

The pallet changer of the present invention is not limited to the above-mentioned embodiment. The pallet clamp may be electrically driven. Further, the groove may be U-shaped or concave. Also,
The number of casters provided on the pallet may be four. Also,
The guide rail may be a large flat plate, and grooves may be provided in the vertical and horizontal directions of the flat plate.

EFFECTS OF THE INVENTION The manual pallet changer of the present invention is small and lightweight, has few failures, can be easily operated by hand, and has an excellent workability because an operator can easily approach the table of a machine tool.

[Brief description of drawings]

1 is a top view showing a pallet changer of the present invention, FIG. 2 is a sectional view taken along the line II-II of the pallet magazine shown in FIG. 1, and FIG. 3 is a sectional view taken along the line III-III. 4 is a top view of the table shown in FIG. 1, FIG. 5 is a side view of a partial cross section of the table, FIG. 6 is a cross sectional view taken along line VI-VI of FIG. 4, and FIG. FIG. 8 is a front view showing an overview of a pallet changer showing a tip cover attached to a machine tool body, and FIG. 8 is a side view of the pallet changer of FIG. 11 …… table 12 …… pallet magazine 13 …… opening joint 17 …… first guide rail 22 …… groove 24 …… ball caster 28 …… second guide rail 43 …… clamping means

Claims (1)

[Claims] 1. A manual pallet changer for loading and unloading a pallet between a table of a machine tool and a pallet magazine, wherein a spherical contact type first caster (24) is provided below the pallet, and the pallet magazine is provided. A second caster (14) is provided on the leg portion of (12), the pallet magazine (12) is connected to the machine tool by an opening / closing joint (13), and a first guide rail (in a predetermined direction of the pallet magazine (12) ( 17) is provided, and a second guide rail (28) that is substantially orthogonal to the first guide rail (17) is provided in the other direction of the pallet magazine, and the first and second guide rails (17, 28) are provided.
A groove (22) for guiding the first caster (24) is provided on the first guide rail (17, 28), and a pallet is placed on the first and second guide rails (17, 28) so that the first caster (24) and the groove (22) function. The pallet magazine (12) can be replaced by manually moving the pallet, and the pallet magazine (12) can be entirely swung around the fulcrum of the opening / closing joint (13). A manual pallet changer characterized in that the second guide rail (28) faces the table of the machine tool when the (12) is in the closed position.