JPS5988235A - Machine tool with tool storage magazine - Google Patents

Abstract

PURPOSE:To prevent chips flying under machining, from clining to tools stored in a magazine, by supporting the magazine to be movable back and forth relative to the spindle of a machine tool. CONSTITUTION:A magazine 10 is moved on a support base 7 between a foremost position near a spindle and a rearmost position for from it by a magazine reciprocating cylinder 11. A driving sprocket 13, which is integrally coupled with a driving gear 14, is rotatably supported on a shaft 12 extending vertically and secured on the front of the magazine 10. The sprocket 13 is rotated by a motor 15. A shaft 16 is provided on the rear of the magazine 10 in parallel with the shaft 12 to adjust the tension of an endless chain 18 engaged with the driving sprocket 13 and a driven sprocket 17. A plurality of claws 19, by which tools T are removably held, are coupled to the chain 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a machine tool, in particular a magazine body for holding a plurality of tools, in which a tool storage magazine is installed on the side of a column that guides and supports a spindle head that supports a spindle in a vertically movable manner. The tool storage magazine is guided so that it can move forward and backward relative to the spindle, moves the magazine body toward the spindle when changing tools, and retracts the magazine body to a position where it does not interfere with the movement of the spindle after the tool change is completed. This relates to machine tools equipped with

In the case where a tool storage magazine is installed on the column side, when changing tools without using a tool changer, the magazine body holding a plurality of tools is guided and supported so that it can move forward and backward with respect to the main axis of the machine tool, When changing tools, it is necessary to move the magazine body toward the spindle, and after the tool change is complete, it is necessary to retract the magazine body to a position where it does not interfere with the movement of the spindle. If this retracted position is close to the spindle, the workpiece There is a risk that chips scattered during machining may adhere to the taper fitting surface of the tool held in the magazine body, making it impossible to mount the tool on the spindle in the correct orientation.

For this reason, it is better to move the magazine body back as far away from the spindle head as possible, but if you do this, not only will the moving stroke of the magazine body become large and the machine become larger, but also the magazine body will need to be moved when changing tools. There is a problem in that it takes time to move forward and backward, and the time required to change tools becomes longer.

In order to solve the above problem, the present invention provides an opening/closing cover on the magazine body side to shield between the tool holder and the main shaft.
This opening/closing cover is opened when the magazine body is moved toward the main shaft, and closed when it is in the retracted position, so that it will not scatter even if the magazine body is moved as close as possible to the main shaft. To provide a machine tool which is free from the influence of powder, and therefore reduces the forward and backward stroke of the magazine body and shortens the tool change time.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a machine tool according to the present invention, in which 1 is a bed, 2 is a machine tool according to the present invention;
is a table provided on the ped 1, and is capable of sliding in a direction perpendicular to the plane of the drawing. 3 is a column fixedly installed on the ped 1 across the table 2; 4 is a saddle supported by the column 3 so as to be movable in a horizontal direction that intersects with the sliding direction of the table 2; 5 is a saddle 4; It is a spindle head provided to be movable in the vertical direction, and has a spindle 6 in the direction of the vertical spiral 11 line.

Reference numeral 8 denotes a tool storage magazine which holds a tool 1, and is placed between a forward end position close to the main shaft 6 and a backward end position far from the main shaft 6 on a support base 7-H which is eB toward the column 3011111. It is advanced and retreated.

The structure of this tool storage magazine 8 will be explained with reference to FIGS. 2 and 3.

IO is a magazine body, and a cylinder 11 for advancing and retreating the magazine.
It moves on the support base 7 to the forward end position and the backward end position. When the magazine body 10 is directed forward, a support shaft 12 is fixed to the front end of the magazine body 10 in the vertical axis direction, and a drive sprocket 13 integrated with a drive gear 14 is rotatable on the support shaft 12. It is pivoted on -
(.15 is an indexing motor that rotationally drives the drive gear 14.

At the rear end of the magazine body 10, there is a support shaft 1 with Ail markings.
The support 16 on the two axis lines connects the chain 1, which will be described later.
8, the distance between the shafts 12 and 12 can be adjusted, and the driven Sugerocket 1
7 is rotatably supported.

An endless chain 18 is passed between the driving sprocket 13 and the driven sprocket 17, and a plurality of gripping gourds 19 for detachably holding the tool T are connected to the chain 11 at predetermined intervals.

The driving sprocket 13 and the driving gear 14 are supported by a shaft.
A support shaft is provided in the magazine body 10 passing through the axis of the support shaft 120 in front of the filter, and a pair of opening/closing covers 2 are attached to this support shaft.
The opening/closing cover 21 is a tool held in the magazine body 10 by the opening 32 of the fixed cup which surrounds the front corner of the magazine body 0. 'r has a five-fan shape, and the key position thereof is a turning support point by the support shaft 20.

A fixed bin 22 is provided at the rear σ) upper part of the pivot support point based on the support shaft 20vI.
As the second fixing means, a frame body C is fixed on the support base 7, a cross member 24 located above the magazine body 10 is fixed to this frame body 23, and the fixed bin 22 is fixed to the cross member 24. Fix it.

Further, a pivot pin δ is placed in front of the pivot support point by the support shaft nod, and on the upper surface of the opening/closing cup <-21σ).
One end of the link 26 is pivoted to this pivot pin 6. A long hole 27 is formed at the other end of the link 26, and the long hole 27 is slidably engaged with the fixed pin 22. Further, an open/close cover 21 is provided between the fixed bin 22 and the vicinity of the pivot point of the link 26 by the pivot bin 5.
A spring portion is tensioned to apply a turning force f=J in the closing direction.

In the illustrated example, the opening/closing cover 21 is composed of a pair, and therefore the opening/closing cover 21 corresponds to the fixed bin 22, the pivot bin 5, the link 26, and the spring foot. The pair of opening/closing covers 21 are combined into one shape, and include a fixed bin 22, a pivot bin 6,
It is also possible to configure the link portion and the spring path as a single piece.

In the figure, reference numeral 29 denotes an outer cover fixedly installed on the support space 7, which has an opening I through which the magazine body 10 moves forward and backward, and stores the magazine body IO in the backward position of the magazine body 10 at position 9114.

Since the present invention has the above-mentioned configuration of ' It is closed by force and isolates the tool T held in the magazine body 10 and the main shaft 6, and prevents the problem that chips etc. scattered during workpiece machining adhere to the taper fitting surface of the tool and T. It is prevented.

When the magazine body 10 moves forward toward the main shaft 6 during tool exchange, the link 26 tends to move linearly along with the magazine body 10. However, since this link 26 is pulled backward by the spring path, the link swings with the fixed bin 22 as a fulcrum due to the external force due to the forward movement of the magazine body 10, and the opening/closing cover 21 is applied to the tension force in the closing direction of the spring. The magazine body 1 rotates in the opening direction against the
0 becomes the fully open state at the forward end position near the main Il+6.

When the tool exchange is completed in this state and the magazine body 10 is moved backward, the link 26 is restricted from moving backward by the fixed bin 23, so the opening/closing cover 2 is moved by the tension of the spring section.
1 turns in the closing direction and becomes fully open at the rearward end position stored inside the ill cover 29.

As described above, according to the present invention, the opening/closing cover is provided which opens when the magazine body moves forward and isolates the tool held by the magazine body from the main shaft at the backward end position. The retracted position should not be located too far away from the main body 11111 than necessary; therefore, the forward and backward stroke of the magazine body can be reduced, and the tool exchange time can be shortened.

In addition, since the opening/closing operation of the opening/closing cover utilizes the forward and backward movement of the magazine body, there is no need for a special actuator, which is very advantageous in terms of space, energy, and cost. , has the advantage that reliable operation can be obtained with a simple structure of a closing spring and an opening link.

[Brief explanation of the drawing]

FIG. 1 is a front view of a machine tool according to the present invention, FIG. 2 is a cross-sectional view of a tool storage magazine, and FIG. 1.1 bed, 21111m table, 3-fist/column, 4e...saddle, 5...spindle head, 600. main shaft,
7..., support base, 8.・. Tool storage magazine, lO...Magazine body, II-...
・Magazine advancement/retraction cylinder, 19...gripping claw, 20・
...Support shaft, 21...Opening/closing cover, 22..., Fixed bin W @ 1111 Pivoting bin, A00. Link, 27
...φ long hole, hole...spring, 31.---Fixed cover.

Claims (1)

[Claims] (+) A machine tool having a spindle head that supports a spindle, and a tool storage magazine installed in the side force of the spindle head,
A support base is installed on the side of the spindle head, and a tool holder for holding a plurality of tools is provided on the support base, and a drive device moves the forward end position close to the spindle and the retreat end position far from the spindle. The housing includes a spring that guides and supports a magazine main body that moves forward and backward therebetween, rotatably supports an opening/closing cover that shields between the tool holder and the main shaft, and biases the opening/closing cover in a closing direction. A fixed bin that is substantially integral with the support base is provided at a position rearward from the pivot support point of the opening/closing cover, and a link is guided and supported by the fixed bin, and the tip of this link is placed in front of the pivot support point of the opening/closing cover. A tool storage magazine equipped with an opening/closing operation device for opening/closing the cover which is pivotally attached to the magazine body, opens by the forward movement of the magazine body, and closes by the backward movement of the magazine body. (2) The above-mentioned opening/closing covers can be opened/closed in opposite directions.
A machine tool equipped with a tool storage magazine, characterized in that it is composed of a pair of cover members.