JPS5840243A - Pallet changer - Google Patents

Abstract

PURPOSE:To aim at making a pallet convertible automatically in an accurate, easy manner, by fitting an E-shaped fork member, which performs reciprocating motion to and from the table base of a metal cutting machine tool, in slideway grooves provided at both sides of the pallet so as to hold and convey said pallet. CONSTITUTION:A table T clamping a pallet Pa with a clamp plate 25 slides on a base B in the direction of an arrow X and helps cut a workpiece on the pallet. A rack 20 engaging in an extended chain 21 on a pallet changer base 19 is secured to the lower surface of an E-shaped fork member 11 provided with two openings and travels by reciprocation of the chain 21. When the fork member 11 starts traveling, a pallet supporting member 13 is inserted into slideway prooves 14 provided at both sides of the pallet Pa on the table T. The fork member 11 is moved back after the following procedures get through; clamping the pallet Pa is released, the table T is moved in the direction of said arrow X and traveled as far as beneath a pallet Pb, and this pallet Pb is clamped to the table T.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a pallet changer for alternating pallets to a table space of a machine tool.

In order to prevent a decrease in the operating rate of the machine tool 0 due to workpiece O stage machining 111K, pallet changers that automatically change pallets according to the table pace of the machine tool are widely used.

The purpose of this product is to provide a small pallet changer with a small surface area in a compact manner, since it is used in a comparatively small machine tool equipped with a table pace for direct retransfer. Wow.

This pallet chain a)/ja is equipped with a Mllll fork member that reciprocates toward the machine tool O table pace, and has a sliding member on both sides of the pallet. It is characterized by being inserted into a groove and supported by a pallet so that it is transparent.

The following is an explanation of the actual example with reference to the drawings.

FIG. 7 is a plan view of the pallet changer according to the present invention, FIG. 1 is a partial cross-sectional view taken along line IF in FIG. 1, and FIG.
-1 line partial sectional view. In the figure, the symbol // is a double-sided door opening member, and the E-shaped fork member // has one opening l located parallel to each other, and this opening opening /J
A pallet support part /J is provided along the opening edge /Ja of O. The pallet support part / 7 is inserted into the sliding groove / 41 provided on both sides of the pallet to support the pallet (P), and has a convex shape. are provided on both sides of the pallet because they are perpendicular to the reciprocating direction of the table base of the machine tool (#!/arrow X direction in the figure). The Nil fork member // is mounted on a pair of guide rails tzm arranged in a direction orthogonal to the direction of reciprocating movement of the table base TO and on the central guide rail 16. The guide rails /1 and /4 are fixed to the base /l of the pallet changer, respectively, since the guide rails /1 and /4 are arranged so as to be reciprocally movable via the pallet changer. In addition, the tips of the pair of guide rails are pulled up to a position where they sandwich the table base T of the machine tool from both sides.
The W1y oak member /l moves along the guide rail tslc, and the upper part of the table base T is sufficiently inserted into the opening l- of the opening l-. I
A hook member
The membership is suspended. The silent chain col is equipped with a pair of sprockets wVC*m, one of which is rotationally driven by a hydraulic motor.

A pallet P is attached to the opening edge lJ1 of the multi-form fork member //.
The side of i [K provided! ! A stopper, us, and mb, which are inserted and stopped at IN (!I not shown), are installed so that they can be moved back and forth alternately.

The table base is rotatably mounted on a saddle cock that reciprocates in the direction of arrow X on the bellows) 1, and
It has a clamp plate that clamps and holds the pallet ν.

Next, the operation and effects of this embodiment O having such a configuration will be explained.

The dam view to the end view are explanatory diagrams showing the operation of the pallet changer according to the present embodiment. 5k as shown in the dam map
, a pallet (Pa) is placed on the machine tool O table pace T, and a pallet (pb) is supported on the oak member //117. Now, assuming that the workpieces placed on pallet P& have been processed and the workpieces placed on pallet pb are unprocessed, I will explain the operation of exchanging these workpieces with respect to table base 〒.

First, in the state shown in Fig. 1), the clamp 111w is raised, the pallet Pa is raised, and the pallet Pa and the flang plate are unclamped. // is moved in the direction of the table base of the machine tool, and the pallet support part tS is inserted into the pallet Pa 0llll movement groove.
From this k, a pallet) Pa, WbtiLMl/l is supported by the fork member //.

When moving the small fork member l/, the guide tray kl
! /4K) If a taper is provided near the tip or a lifting cam is provided to slightly lift the IC117*-ri member/l, pallets h and b can be slightly lifted from the pallet support part tJTK at the same time. , a gap is created between the clamp plate U and the saddle MO, which allows the subsequent movement of the clamp plate U to be carried out smoothly.
Due to the movement, the table base is in the direction of the CWA arrow VC.
＄It is moved and the clamp plate U is exposed) Pb O”F
ll will be suspended from insertion.

In this OS, the stopper 4a approaches and stops the pallet Pa, and the stopper that stops the pallet bK retreats and comes off. Subsequently, the MWi fork unit #/l moves backward, and the pallet (Pa) is transported rearward, while the pallet (b) is left on the table base. Pallet deck b is clamped by clamp 1, moved to a predetermined position O by saddle J, and machining of the workpieces placed on pallet pbK is started.

On the other hand, the workpiece placed on the pallet (P&) is replaced with an unprocessed workpiece.

In this way, one pallet I'a, Pis is exchanged with respect to the table base T, and the reciprocating movement of the goose-shaped fork member Iio is performed by reciprocating the silent chain U from the hydraulic cylinder agc. Wow.

Further, these series of operations are appropriately controlled by the building detection switch and the dock assembly using general sequence technology.

As explained above, according to the present invention, the number of pallets can be reliably adjusted to the table pace of a machine tool.

Pallet replacement according to the present invention can be easily and automatically replaced by using the reciprocating movement of the table base.
This can be done by reciprocating the I-type fork member in a direction perpendicular to this movement direction, and compared to the conventional eccentric placement using a swing arm, the placement is smaller and more compact. Move the play fork member to a position above the table base and press it directly against the table base.
Since the transfer operation is performed at 5K, the pallet O can be moved quickly and reliably, and the rigidity of the pallet changer can be improved.

[Brief explanation of drawings]

Figure 1 is Honji 9I! 1 is a plan view of a pallet changer according to
The 11-1 line partial cross-section diagram and the Dam diagram to the DiD diagram are explanatory diagrams showing the operation of the pallet changer O according to the present invention. //...1117 Oak member, closing... opening, /
J l--opening edge, /J--pallet support section, line--sliding groove of pallet, J5--tutter member, co/-
・・Silent chain, Co.・Clamp plate, JAa
, J4k...Stopper, Ding...Table pace. Seijin Agent Kasu Mata Kiyoshi 82 Figure 7ρ Figure 3 Figure 4A Figure 4B

Claims (1)

[Scope of Claims] l Having a pallet clamp mechanism, a sliding groove is provided on the side surface of the table base O on the side perpendicular to the direction of reciprocating movement with respect to the table pace of the machine tool moving back in the # direction Ka. The pallet changer alternately exchanges pallets provided therein, the pallet changer has one O opening provided parallel to each other, and the pallet 0IlIIkflI is inserted along the edges of the opening. This is because it consists of a forter member with a pallet support part that is slidably engaged with the machine tool, and a reciprocating drive mechanism that moves the key recorder member back and forth on the table space of the machine tool. A palette changer featuring 1. The reciprocating drive mechanism includes a chain device and a rack member that is linearly moved back and forth by the chain device, and the rack member is the IC! Claim 1, paragraph 0, characterized in that it is fixed to the Jl fork member'.
Palette changer