JP3995438B2 - Tool magazine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tool magazine for a machine tool, and more particularly to a tool magazine provided with a magazine door whose opening / closing safety is ensured by an interlock switch.
[0002]
[Prior art]
Conventionally, a tool magazine is provided on the side of a machine tool such as a machining center, and the tool magazine is used to index a tool T to be used in the next process to an automatic tool changer and to be used from the automatic tool changer. A used tool is received and stored in a predetermined position. The tool magazine is stored in the tool magazine cover to protect the tools to be stored from dust and cutting oil scattered in the atmosphere of the factory, etc., or from the aesthetic point of view of the machine tool, to ensure the safety of the operator. ing. For example, JP-A-4-365536 discloses a cover device that houses a tool magazine including an automatic tool changer.
[0003]
4 and 5, a front view of a tool magazine cover 51 is shown as an example of the tool magazine cover. The tool magazine cover 51 accesses a tool loading station (TLS) from the outside of the cover 51 and attaches a desired tool to the tool magazine inside the cover 51 or removes a tool from the tool magazine. For this purpose, a TLS door 55 is provided. Further, when changing all the tools stored in the tool magazine or a considerable number of tools when changing the line of the machine tool, etc., or for maintenance of the tool magazine, the upper door 53 and lower A door 57 is provided.
[0004]
[Problems to be solved by the invention]
If at least one of the doors 53, 55, and 57 of the tool magazine cover 51 is open and the tool magazine is activated, the operator's body may be damaged. As a method for preventing this, it is conceivable to dispose the interlock switches 59, 61, 63 on the doors 53, 55, 57 and stop the operation of the tool magazine while the doors are open.
[0005]
An object of the present invention is to reduce the number of interlock switches of a tool magazine cover having a plurality of doors and to ensure safety.
[0006]
[Means for Solving the Problems]
The present invention according to claim 1, a tool for automatic tool change with the spindle of the machine tool and a plurality of storage, in a tool magazine covered by a cover, can be opened and closed to the open mouth of the cover A magazine door composed of a predetermined one door and other doors for replacing and checking the stored tools, and the predetermined one door if the other doors are not closed. as not close, provided between said predetermined one door the other and superposed portions formed in overlapped with each other so from the outside part of the door, said predetermined one door and the cover frame The gist of the present invention is a tool magazine comprising an interlock switch for detecting that the predetermined one door is closed.
Due to the presence of the overlapping portion, the predetermined door will not be tightened unless it is the last one, and the interlock switch is actuated by the tightening to ensure safety. That is, the magazine door does not open while the tool magazine is operating, and the tool magazine does not operate when the magazine door is open.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
First, referring to FIG. 3, a machine tool 101 including a tool magazine 11 according to an embodiment of the present invention is illustrated. The machine tool 101 includes a bed 103 that is installed and fixed on a floor surface of a factory or the like. On the upper surface of the bed 103, two X-axis guide rails 105 are extended in parallel to the X-axis direction, which is the horizontal left-right direction, and the column 107 is provided along the X-axis guide rail 105 so as to be reciprocally movable. It has been. In front of the column 107, two Z-axis guide rails 113 extend in parallel in the Z-axis direction, which is a horizontal direction perpendicular to the X-axis direction, and a table 115 extends along the Z-axis guide rail 113. It is provided so that it can reciprocate. In addition, two Y-axis guide rails (not shown) are extended in parallel on the front surface of the column 107 in the Y-axis direction, which is a vertical direction perpendicular to the X and Z axes. A spindle head 109 is provided so as to be reciprocally movable. The spindle head 109 rotatably supports a spindle 111 extending in the Z-axis direction. A tool (not shown) such as a drill or an end mill is attached to the tip of the spindle 111, and the tool is rotated to move relative to the workpiece placed on the table in the X, Y, and Z directions. By doing so, the workpiece is processed into a desired shape.
[0008]
In the machine tool 101, the front area of the column 107 is covered with a splash guard 117, and a machining space is defined by the splash guard 117. In addition, a pallet exchanging device 119 having a pair of pallet exchanging arms 123 arranged back to back, a pivot shaft 121 erected in the vertical direction, and a swivel door 125 that partitions the entrance portion of the splash guard 117 at the entrance portion of the splash guard 117. Is arranged. The front part of the revolving door 125 is a pallet loading station 127, which removes a processed workpiece (not shown) from the pallet P, places an unprocessed workpiece (not shown) on the pallet P, and fixes it. Setup is performed.
[0009]
A tool magazine 11 is disposed on the side of the machine tool 101. The tool magazine 11 is housed in a tool magazine cover 13 and stores a plurality of horizontally oriented tools T arranged in the vertical direction. The tool magazine 11 also determines a tool T to be used in the next process in an automatic tool changer (not shown), receives a used tool from the automatic tool changer, and stores it in a predetermined position. On the front surface of the tool magazine cover 13, a magazine door 15 is provided for maintenance of the tool magazine 11, particularly for attaching / detaching a desired tool to / from a tool loading station (TLS) by an operator. As shown in FIG. 3, the magazine door 15 is rotatably attached to the tool magazine cover 13 via a hinge (not shown).
[0010]
Referring to FIG. 1, the magazine door 15 includes an upper door 17, an intermediate door 19, and a lower door 21, which can be opened and closed. In particular, in the present embodiment, the intermediate door 19 is disposed at a position corresponding to the tool mounting station TLS. Here, referring to FIG. 2, which is a cross-sectional view taken along line II of FIG. 1, the upper and lower doors 17 and 21 are overlapped portions 17 a and 21 a provided so as to partially overlap the intermediate door 19 from the inside. The intermediate door 19 constitutes an outer door. Thus, the upper and lower doors 17 and 21 are prevented from opening outward from the intermediate door 19.
[0011]
The intermediate door 19 is provided with a latch 23 that can be operated from the outside of the tool magazine cover 13. The intermediate door 19 cannot be opened by latching the intermediate door 19 from the outside by the latch 23. An interlock switch 25 for detecting the operating position of the latch 23 is disposed in the vicinity of the intermediate door 19, more specifically in the vicinity of the latch 23, on the side wall in front of the tool magazine cover 13. The interlock switch 25 can be formed by, for example, a proximity switch, detects the latch 23 in the locking position, and sends a detection signal to a control device (not shown) of the machine tool 101. When receiving the detection signal from the interlock switch 25, the control device determines that the intermediate door 19 is closed. The interlock switch 25 may be another type of switch.
[0012]
As described above, since the upper and lower doors 17 and 21 have the overlapping portions 17a and 21a, they cannot be opened outside the intermediate door 19. That is, the intermediate door 19 is always tightened after the upper and lower doors 17 and 21 are tightened. Therefore, when the detection signal is sent from the interlock switch 25 to the control device, it can be determined that all of the upper door 17, the intermediate door 19, and the lower door 21 are closed. On the other hand, when the control device does not receive the detection signal, one of the upper door 17 and the lower door 21 and the intermediate door 19 or the intermediate door 19 are open. Therefore, in this case, if the control device is configured not to operate the tool magazine 11, the operator accessing the inside from the opened door is prevented from being injured. Thus, according to the present embodiment, the safety of the tool magazine 11 can be ensured by one interlock switch 25.
The magazine door can also consist of two. Even if two doors are not provided side by side as in this embodiment, it is detected that a small door is provided in the large door and the small door is closed with respect to the magazine cover frame. An interlock switch may be provided.
[0013]
【The invention's effect】
According to the present invention, it is possible to detect that all magazine doors are closed by providing an interlock switch only for the outer door, and the number of interlock switches can be reduced to one. It becomes possible.
In addition, it is easier to manufacture and the operator to operate a combination of two or three small doors than to configure the magazine door with a single large door.
[Brief description of the drawings]
FIG. 1 is a front view of a tool magazine cover.
FIG. 2 is a cross-sectional view of the magazine door taken along the line of sight II in FIG.
FIG. 3 is a plan view of a machine tool to which the present invention is applied.
FIG. 4 is a front view of a tool magazine cover according to the prior art.
5 is a cross-sectional view of the magazine door taken along the arrow line VV in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Tool magazine 13 ... Tool magazine cover 15 ... Magazine door 17 ... Upper door 17a ... Superimposition part 19 ... Intermediate door 21 ... Lower door 21a ... Superimposition part 23 ... Latch 25 ... Interlock switch 101 ... Machine tool 103 ... Bed 107 ... Column 109 ... Spindle head 111 ... Spindle 115 ... Table 117 ... Splash guard 119 ... Pallet changer 121 ... Swivel shaft 123 ... Pallet change arm 125 ... Swivel door 127 ... Pallet loading station T ... Tool P ... Pallet

Claims (2)

In a tool magazine covered with a cover that stores multiple tools for automatic tool change with the spindle of the machine tool,
Openably provided on the open mouth of the cover, and consists of a predetermined one door and another door, and the magazine door for performing replacement and inspection of the housed tool,
An overlapping portion formed so that the predetermined one door is overlapped with a part of the other door from the outside so that the predetermined one door is not closed unless the other door is closed ;
An interlock switch provided between the predetermined one door and the frame of the cover, and detecting that the predetermined one door is closed;
The tool magazine characterized by comprising. The magazine door includes an upper door, an intermediate door, and a lower door, one predetermined door of the magazine door is the intermediate door, and the overlapping portion is configured such that the intermediate door is the upper door and the lower door. The tool magazine according to claim 1, wherein the tool magazine is provided so as to be partially overlapped from the outside .

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