JPH039958Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) This invention provides a fixing means that can be built into the moving body such as a work table that has a difficult structure to incorporate a means for attaching and fixing. The present invention relates to a pallet with a built-in fixing means, which is characterized by being locked with a handle.

(Prior Art) Conventionally, among the workpiece and tool holding devices that can be removed from the machine as accessory devices for machine tools, those that are attached to a work table, etc., have been attached to the work table of a machining center and can be replaced freely. In the palette that
In a pallet changer, a barbed pin is inserted into the T-slot on the lower surface, and the pin is fixed by pulling the pin from the table side.
A means of fixing the pallet by driving a pin into a locking hole provided on the side surface of the pallet from the side wall of the inverting table is usually used, and it has been hoped that a means for further saving labor when replacing the pallet will be realized.

(Problems to be solved by the invention) In view of the above-mentioned circumstances, this invention can be easily attached to a moving object such as a work table and it is difficult to incorporate fixing means and a driving source inside the pallet itself. The present invention is intended to facilitate attachment and replacement of pallets by incorporating a fixing means in the pallet, which is the opposite of the conventional technique for locking the pallet to a work table or the like.

[Structure of the idea]

(Means for Solving the Problems) This invention is a means to achieve the above-mentioned purpose, and is a fixing means that can be built into the lower frame of the pallet mounting floor plate. It consists of a lever arm device and a clamp cylinder that can fix a bracket, which has a T-groove protruding from its lower end that allows the head of a barbed pin, which has been screwed onto the work table in advance, to be inserted and held while moving the pallet laterally, and can be moved up and down. In addition to incorporating an appropriate number of fixing devices, shafts that can be inserted into and engaged with the support holes provided in the opposing support side walls of the inversion table that supports the pallet when exchanging or inverting the pallet are installed on both longitudinal end faces and one longitudinal side of the pallet. A reciprocating drive means consisting of a clamp cylinder that can be freely engaged and removed from the side and loaded with a spring, and a stopper that intervenes in the gap between the rear end of the shaft and the clamp cylinder head from a direction perpendicular to the shaft axis to freely engage and disengage the shaft. This relates to a pallet provided with a clamp cylinder that can be fixed to a pallet.

(Function) The function and effect of this device will be explained. In Figures 4 and 7, pallet 1 is placed on work table T.
When fixing the pallet 1 to the barbed pin 4 which is screwed onto the work table T and has a protruding jaw part 8.
While moving the bracket in a lateral direction perpendicular to the direction of movement of the work table T, it is inserted into the T-groove 9 of the lower end 10 of the bracket 14 protruding from the lower side of the pallet 1. At this time, the bracket 1 is moved by the elastic force of the spring 13 so that the lower end surface of the T-slot 9 is at the lowest position.
4 is pushed down, and the insertion gap of the barbed pin 4 is T.
It is formed between the groove 9 and the lower surface of the jaw. At this time, the opposite arm 22 of the lever arm 18 is connected to the bracket 1.
4. A stopper 24 that can limit the swing by hitting the lower surface of the arm 22 is installed vertically on the surface of the arm 22, and its length is adjusted, so that when the hydraulic pressure of the clamp cylinder 23 is released, the cylinder head 25 moves to When the bracket 14 is pushed up to the upper surface and reaches the raised position and stopped, as shown in FIG. 7, the clamp cylinder 23 is moved and the cylinder When the arm 22 is pushed down by the head 25 and reaches a horizontal position, the bracket 14 can hold the jaw pin 4.

Therefore, since the clamp cylinder 23 can be fixed at a length that allows hydraulic pressure to be applied, the time required for installing the pallet 1 can be streamlined, which can significantly contribute to increasing the efficiency of the machining center by replacing pallets.

Next, in FIGS. 8 and 10, the shaft 6 is inserted and locked into the support hole S provided in the opposite side wall where the pallet 1 is attached to the reversing table H which becomes the pallet changer C. The shaft 6 is supported by bushings 31 provided on the end and one side in the longitudinal direction, and a spring 33 is elastically loaded between the shaft 6 and a stepped portion 32, so that the shaft 6 protruding from the clamp cylinder 36a is retracted by elastic force. A stopper 41 that can move forward and backward in a direction perpendicular to the 6-axis direction of the shaft
the head of the shaft rear end 34 and the cylinder head 3
The fixing device 7 is provided with a clamp cylinder 43 that can intervene between the pallet 1 and the pallet 1 to lock and release the shaft rear end 34, and a spring 48 that allows the stopper 41 to be pushed out is provided at the rear end. Since the pallet can be easily and securely fixed to the side wall of the inversion table H by being built into both ends and one side of the table, the effect is great.

(Example) An example of this invention will be described below based on the drawings. Figures 1 and 2 show the left and right sides of a pallet 1 that incorporates the fixing means of this invention, and lower frames 3a, 3b,... A total of 10 fixing devices 5, which can hold and fix the jaw pins 4 protruding from the work table T shown in FIG.
The pallet is provided with a fixing device 7 which can insert and support the shaft 6 into the side wall of the reversing table H of a total of six pallet changers C at two places on both left and right ends and on one side. In addition, four floating wheels R for pallet movement are provided respectively.

Figure 3 shows pallets 1 installed above and below the inversion table H.
, which is incorporated into a pallet changer C which is supported by the side wall of a fixing device 7, inverted and moved onto a work table T via a push/pull device P.

4 to 7 show a fixing device 5 that can be fixed to the work table T mentioned above.

A barbed pin 4 screwed onto the work table T shown in FIG. 4 and having a protruding jaw portion 8 is attached to the work table T.
T that can be inserted from the side and hold the jaw part 8
A spring 13 having a groove 9 formed in the lower end 10 and a guide 12 with a protruding upper end 11 fitted into the inner diameter part is elastically mounted between the back surface of the mounting floor plate 2 of the pallet 1 and Middle body part 1 of bracket 14 that can be lowered
5 is opened with a central space 16 passing through the T-slot 9 in a direction perpendicular to the T-slot 9, and a horizontal shaft 17 having both ends pivoted to the bracket 14 is passed through the center thereof in parallel with the T-slot 9. The tip of the lever 19 of the lever arm 18 which can come into contact with the lower circumferential surface of the pallet 1 is allowed to swing freely into the central space 16.
A bracket 21 supporting a rotatable lever arm 18, which is pivoted to a support shaft 20 at the base of a lever 19 that can freely move through the frame 3b, is attached to the mounting floor plate 2 of the pallet 1 on the side of the frame 3b.
A clamp cylinder 23 is provided vertically from the bracket 21 and can be attached to the back side of the lever arm 18 and abut against the top surface of the tip end of the arm 22 facing the lever arm 18.
Further, a stopper 24 whose protrusion length can be adjusted is provided protruding from the upper surface of the arm 22, thereby making it possible to limit the range of swing of the arm 22.

In FIG. 4, the clamp cylinder head 25 is projected, the lever arm 18 is in a horizontal position, and the jaw portion 8 of the jaw pin 4 is inserted into the T-slot 9 of the bracket 14.
Indicates a state of holding.

As shown in FIGS. 5 and 6, the bracket 14
are the frames 3a arranged in parallel on the lower side of the pallet 1,
3b and a small frame 26a connecting this to the left and right,
The small frames 26a and 2
The height of the bracket 6b is set lower than the frames 3a and 3b on both sides so that the lower end 10 of the bracket 14 having the T-groove 9 protrudes and allows the jaw pin 4 to be inserted from the side. Note that a stop pin 17a is provided on the horizontal shaft 17 to prevent movement in the axial direction.

FIG. 7 shows that the tip of the stopper 24 attached to the retractable arm 22 hits the lower surface of the bracket 21 and the lever arm 18 is brought to the lowered position, so that the bracket 14 also lowers and the lower end holding the barbed pin 4 is removed. This shows that a gap 29 is created between the T-slots 9 of the portion 10. At this time, the lower end portion 10 of the bracket 14 is in a state of slightly protruding from the lower surface of the frames 3a, 3b of the pallet 1. Further, a shim 30 is inserted between the upper surface of the bracket 21 and the lower surface of the mounting floor plate 2 of the pallet 1 to facilitate adjustment of the mounting of the lever arm 18 and clamp cylinder 23.

Figures 8 to 11 show pallet changer C.
This figure shows a fixing device 7 that can insert and fix the shaft 6 into a support hole S provided in a support side wall of an inversion table H.

FIG. 8 shows a bushing Bf that has the head of the shaft 6 protruding from the longitudinal end face of the pallet 1 and is attached to the reversing frame F that forms the supporting side wall of the reversing table H.
A fixing device 7 is built into the lower side of the pallet 1, which is shown engaged with a support hole S. Bushing 31 provided on the end face and frame 3c
The shaft 6, which is supported by
1, a spring 33 is loaded between the clamp cylinder 36a and the pallet so that the shaft 6 always acts in the retracting direction, and the head 37 of the clamp cylinder 36a, which can be fitted into the recess 35 provided in the rear end 34 of the shaft 6, is protruded and driven. It is supported by a slider 38 and a retainer 39 installed on the back side of the mounting floor plate 2 of No. 1, and is attached to a slidable holder 40 as shown in FIG. This is a double-barreled system.

FIG. 10 shows the front end portion 42 of the stopper 41 that can releasably lock the shaft rear end 34 in the forward position where the shaft 6 is projected and locked in the support hole S from the lateral direction perpendicular to the shaft 6. The head 44 of the clamp cylinder 43 is formed so as to be able to intervene between the rear end 34 of the shaft, and as shown in FIG. L that can be connected to cylinder 43
The long legs of the letter-shaped stoppers 41 are slidably attached along the horizontal frame 3c of the pallet 1, and the ends of the springs 48, which can be fitted into the guide shafts 47 protruding from the rear end, are attached to the frame 3d of the pallet 1.
The stopper 41 is so formed that it always exerts a repulsive force that can be brought into contact with a block 49 attached to the shaft 6 to advance the stopper 41 and lock it to the rear end 34 of the shaft 6.
In this case, the clamp cylinder 43 is the stopper 4.
It acts to move back 1.

[Effect of idea]

Since this invention has the above-mentioned configuration, it has the following advantages.

(1) Because the work table of a machine tool is a movable object, it is difficult to incorporate a means for fixing a holding device for workpieces and tools or a drive source inside. This structure can be solved by incorporating fixing means into the pallet itself. Easy and hassle-free.

(2) Since the rotating reversing frame of the pallet changer is also a moving body, by providing the same fixing means as above on the pallet side, it can be easily installed and the pallet can be replaced without any hassle.

[Brief explanation of drawings]

Figure 1 is an explanatory view (front view) of the entire assembly of the right rear side of the pallet incorporating the fixing means of this invention;
The figure is also an overall assembly explanatory diagram (front view) of the left rear side,
Fig. 3 is an explanatory diagram (side view) of the pallet mounted on the pallet changer, Fig. 4 is an explanatory diagram (partial sectional view) of the overall assembly of the fixing device for mounting the work table, and Fig. 5 is the same as above (rear view). ), Figure 6 is the 5th
7 is an explanatory diagram (cross-sectional view) of the same fixing device as above when the arm is raised, and FIG. 8 is an explanation of the assembly of the shaft drive part of the fixing device for attaching the reversing table of the pallet changer. (side sectional view), FIG. 9 is a BB sectional view of FIG. 8, FIG. 10 is an overall assembled view (plan view) of the same fixing device as above, and FIG. 11 is same as above (side view). Explanation of the symbols of the main parts: 1: Pallet with built-in fixing means, 2: Mounting floor plate, 4: Jaw pin,
5: Fixing device, 6: Shaft, 7: Fixing device,
9: T groove, 14: Bracket, 23: Clamp cylinder, 33: Spring, 34: Shaft rear end, 3
6a, 36b: Clamp cylinder, 37: Clamp cylinder head, 41: Stopper, 4
3: Clamp cylinder, 48: Spring, H: Inversion table, S: Support hole, T: Work table.

Claims (1)

[Scope of utility model registration request] A bracket 14 having a T-slot 9 protruding from the lower end 10 into which a jaw pin 4 protruding from the work table T can be inserted and held is provided with a clamp cylinder 23 which can be fixed in a vertically movable manner via a lever arm 18. A clamp that can detachably engage the head of the shaft 6 from the longitudinal end face, which can be inserted into and engaged with the support hole S provided in the supporting side wall facing the fixing device 5 and the inversion table H that supports both ends and sides of the pallet and can be turned over. Cylinder 36a, 36b and spring 33
and the rear end 34 of the shaft 6.
A stopper 41 is interposed between the shaft 6 and the clamp cylinder head 37 from a direction perpendicular to the axis of the shaft 6, and a spring 48 capable of locking the shaft rear end 34 and a clamp cylinder 43 are provided so that the clamp cylinder 43 can be freely engaged and detached. A pallet having a built-in fixing means, characterized in that a fixing device 7 is provided inside the frame 3 on the back side of the mounting floor plate 2.