JP2002220073A - Holder device for assembling mobile working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate replacement and control for a holder when a frame body is assembled in a mobile working machine, and to make control effective for reduction of a storage space for the holder easily executed. SOLUTION: Plural clamp units 13 are mounted position-changeably on a working table 12 for mounting a temporarily assembled and welded truck frame 3 as a work W, the each clamp unit 13 is equipped with a positioning pin 16 inserted into a knock hole 23 formed in the work W, a clamp metal 17 for fixing fasteningly the work W on the working table, and a driving means for operation thereof respectively, and a driving means for position-changing the each clamp unit 13 along a surface of the working table is provided in the working table 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig used for assembling a frame in a self-propelled working machine such as a backhoe or a log loader.

[0002]

2. Description of the Related Art In a backhoe, a track frame for supporting a traveling device, and a turning frame for mounting a front working device, an engine, and a boarding operation unit are provided as frame members. After the components are partially welded and temporarily assembled, they are automatically welded by a welding robot and assembled. Also,
If necessary, machining such as drilling is performed after the automatic welding.

In this case, during the automatic welding process of the frame body, the temporarily assembled work is positioned and fixed by using a jig, and the jig is replaced for the work each time the specification of the work is different. .

[0004]

However, since a jig is prepared for each work having different specifications, it is troublesome to replace the jig every time a work is changed and to manage the jig. It required a lot of space for storage of utensils.

The present invention has been made in view of such circumstances, and can easily perform replacement and management of jigs when assembling a frame body in a self-propelled work machine, and can also perform repair. It is a main object of the present invention to provide an assembling jig device that can easily perform management effective for reducing storage space for tools.

[0006]

Means for Solving the Problems [Structure, operation and effect of the invention according to claim 1]

(Structure) According to a first aspect of the present invention, a work table on which a temporarily assembled and welded track frame is mounted as a work is provided with a pair of clamp units so as to be changeable in position. Equipped with a positioning pin inserted into the knock hole formed in the above, a clamp fitting for tightening and fixing the work on the work table, and a driving means for operating this, and changing the position of each clamp unit along the work table surface The work table is provided with driving means for causing the work table to be driven.

(Effect) According to the above configuration, the clamp unit may be moved to a predetermined position with respect to the work by the driving means each time the work of a different specification is processed. The work can be properly positioned and fixed on one work table.

(Effects) Therefore, according to the first aspect of the present invention, it is not necessary to replace the jig every time the specifications of the workpiece are different, so that the setup can be changed easily and quickly, and the number of models is small. It is possible to improve the efficiency of the assembling operation when manufacturing one base at a time.

[0010] Further, since a single jig device can cope with works of many specifications, the management of the jig becomes easy, and the storage space for the jig can be greatly reduced, contributing to the effective use of the space in the facility. can do.

[Structure, operation and effect of the invention according to claim 2]

(Structure) According to a second aspect of the present invention, in the first aspect of the present invention, by inputting work information, each clamp unit is moved to a predetermined position corresponding to the work for which the work information is input. Control means for automatic movement are provided.

(Operation / Effect) According to the above configuration, information on the work can be read, for example, by key operation, bar code reading,
The clamp unit can be automatically moved to the position corresponding to the workpiece by inputting the information by using the tool, etc., so that the jig can be changed in a very short time, and the time required for the change can be saved. As a result, the working efficiency can be further improved, and the above-described effect of the first aspect of the present invention is promoted.

[Structure, operation and effect of the invention according to claim 3]

(Structure) According to a third aspect of the present invention, a pair of movable frames are horizontally arranged side by side on a work table supporting a revolving frame temporarily welded as a work.
Each movable frame is configured to be movable by a driving means in the direction parallel to the movable frame, and a pair of clamps for locking a work can be moved to each movable frame in a horizontal direction orthogonal to the moving direction of the movable frame. The clamps are arranged so as to be opposed to each other with an interval, and each of the clamps is configured to be movable by a driving means in a horizontal direction orthogonal to the moving direction of the movable frame.

(Operation) According to the above configuration, when processing a workpiece having a different specification, the work frame and the clamps provided for each work frame are moved by the driving means, so that the two-dimensional clamp bracket is moved. It is possible to properly position and fix a work having a dimensional specification that falls within the movement range on one work frame.

(Effects) Therefore, according to the third aspect of the present invention, it is not necessary to replace the jig each time the specifications of the work are different, so that the setup can be changed easily and quickly, and the number of models is small. This is effective in improving the efficiency of assembling work when manufacturing one base at a time.

[Structure, operation and effect of the invention according to claim 4]

(Structure) According to a fourth aspect of the present invention, in the third aspect of the present invention, by inputting work information, each movable frame and a clamp are preset in correspondence with the work for which the work information has been input. Control means for automatically moving to the set position.

(Operation / Effect) According to the above configuration, by inputting information of a work by key operation, reading of a bar code, or the like, each clamp can be automatically moved to a position corresponding to the work. Therefore, the jig can be changed in a very short time, the time for the change can be saved, the work efficiency can be further improved, and the above effect of the third aspect of the invention can be promoted.

[Structure, operation and effect of the invention according to claim 5]

(Structure) According to a fifth aspect of the present invention, a work table for holding a track frame or a turning frame as a work is provided between a processing position of a machining machine and a work attaching / detaching position deviated therefrom. The work table is provided with a plurality of clamp members for fixing the work so as to be movable and adjustable by driving means in two orthogonal directions.

(Operation) According to the above configuration, the work is positioned and fixed to the work table via the clamp at the work attaching / detaching position, and then is carried into the processing position of the machine, where predetermined processing such as drilling is performed. Is applied to the work. When the processing is completed, the work table is moved to the work attaching / detaching position to carry out the processed work and mount a new work.

In this case, when the specification of the work is changed,
The clamp is moved two-dimensionally by the driving mechanism, and the setup is changed to a state where the clamp is positioned and fixed at a predetermined clamp position corresponding to the work.

(Effects) Therefore, according to the invention of claim 5, it is not necessary to replace the jig each time the specifications of the work are different, so that the setup can be changed easily and quickly, and the number of models is small. This is effective in improving the efficiency of assembling work when manufacturing one base at a time.

[Structure, operation and effect of the invention according to claim 6]

(Structure) According to a sixth aspect of the present invention, in the fifth aspect of the invention, by inputting the work information, each of the clamp members is moved to a preset position corresponding to the work in which the work information is input. Control means for automatic movement are provided.

(Operation / Effect) According to the above configuration, by inputting information of a work by key operation, reading of a bar code, or the like, each clamp can be automatically moved to a position corresponding to the work. Therefore, the jig can be changed in a very short time, the time for the change can be saved, the work efficiency can be further improved, and the above effect of the invention of claim 5 is further promoted.

[0029]

FIG. 1 shows a backhoe as an example of a self-propelled work machine. This backhoe is mounted on a track frame 3 provided with a pair of left and right crawler-type traveling devices 1 and a dozer device 2 so that the turning frame 4 can be fully turned.
And a front device 8 in which a bucket 7 and a bucket 7 are sequentially connected, and a driving unit 9 containing an engine (not shown) and a boarding operation unit 10 are mounted.

The track frame 3 and the revolving frame 4 are structures assembled by welding components made of cast steel or steel plate. The present invention improves the jig device used in the process of assembling them. And
One example is described below.

(First example)

FIGS. 2 to 7 show a jig device A1 used in the step of automatically welding the track frame 3. FIG. In the following description, the track frame 3 is referred to as a work W.

The jig device A1 is detachably mounted on a support table 11 fixedly mounted on the floor in front of the welding robot B, and is provided with a work table 12 mounted and connected to the support table 11. And a pair of left and right clamp units 13 protrudingly arranged on the work table 12.

Each clamp unit 13 is provided with a movable frame 15 movable left and right along a rail 14 provided on the lower surface of the work table 12, a positioning pin 16, a clamp 17, and a work support table 18. The two clamp units 13 are horizontally movably exposed from the left and right long openings 19 formed in the work table 2. Also,
A screw shaft 20 that feeds the movable frame 15 by screws and an electric motor 2 that drives the movable frame 15 in forward and reverse directions are provided below the work table 12 as driving means for moving each clamp unit 13 to the left and right.
1 as well as a controller 22 for controlling this.

The positioning pins 16 of the clamp unit 3 are for positioning the work W by being inserted into a pair of knock holes 23 formed in the work W, and are operated by an air cylinder 24. In addition, the clamp 17 is swung up and down around the fulcrum a to hold down and fix the edge of the center opening of the work W, and is swung by the air cylinder 25. .

Here, the controller 22 is connected to a fixed control device 26, and the controller 27 of the welding robot B is also connected to the control device 26. When the information for specifying the work W is input by manual operation, the operation of the electric motor 21 is controlled based on the information set in advance, and a predetermined value set for appropriately positioning and fixing the target work W is set. The clamp unit 3 is automatically moved to the position. In addition, based on the input work information, the welding robot B operates based on a preset program, and automatic welding corresponding to the fixed work W is performed.

Further, the jig device A1 can be detached from the support table 11 and replaced with a support table of another welding robot. At this time, the controller 22 mounted on the work table 12 is replaced with the controller of another welding robot. In this welding robot, the work information is input to the control device as in the previous case, whereby the automatic position change control of the clamp unit 3 and the setting of the welding program are performed. Will be

(Second example)

FIGS. 8 to 14 illustrate a jig device A2 used in the step of automatically welding the turning frame 4. As shown in FIGS. In the following description, the turning frame 4 is referred to as a work W.

This jig device A2 is a welding robot (first
A worktable 32 which is detachably mounted on a support base 11 fixedly mounted on the floor in front of B) and which is mounted and connected to the support base 11;
A pair of left and right positioning pins 33 provided at the center of the worktable 32, four sets of clamps 34 provided at the front, rear, left and right of the worktable 32, and a clamp 34c provided at the center back (robot side). It is composed of

As shown in FIGS. 10 and 13, a support frame 36 is erected on the left and right fixed middle frames 35 located at the center of the work table 32, and the work W 2 is placed on the support frame 36. A pair of left and right free balls 37 received from the bottom
Has been deployed. A movable plate 40 which can be moved up and down via left and right guide shafts 38 and which is driven up and down by an air cylinder 39 is provided between the support frames 36. The movable plate 40 is provided with the positioning pins 33. Thus, the pair of positioning pins 33 are configured to move integrally. Here, a positioning ring member 41 shown in FIG. 14 is bolted and connected to the bottom surface of the work W2 in a predetermined posture, and each positioning pin 33 is inserted into a downward boss 42 provided on the left and right sides of the ring member 41. The work W2 is thus positioned.

Rails 44 are provided on the left and right sides of the worktable 32 to move forward and backward. A horizontally long movable frame 45 is provided so as to be guided by the rails 44 and to be able to move back and forth in parallel.
A screw shaft 46 for moving the movable frame 45 forward and backward by screw feed
The movable frame 45 can be arbitrarily moved in the parallel direction by driving the screw shaft 46 forward and reverse by the electric motor 47. Each of the movable frames 45 is provided with a pair of left and right clamps 34, and the rear movable frame 45 is provided with a central clamp 34c.

The clamp fitting 34 includes a positioning pin 3
The work W2 functions to lock the outer peripheral edge of the work W2 positioned by 3 and press down and fix the work W2, and is configured to be able to swing up and down around the fulcrum b by the air cylinder 48. The clamp fitting 34 and the air cylinder 48 are connected to the rail 52 on the upper surface of the movable frame 45.
The clamps 34 can be moved to the left and right by arbitrarily moving the movable table 49 right and left by the air cylinder 50. . Further, the center clamp fitting 34c also functions to lock the central part of the outer periphery of the positioned work W2 on the deep side and press down and fix the work W2, and swing up and down around the fulcrum c by the air cylinder 53. It is configured to be possible. The clamp metal 34c and the air cylinder 53 are mounted on a movable base 55 that can move left and right along a rail 54 on the upper surface of the movable frame 45 on the back side. By moving the clamp metal 34c back and forth, it is possible to change the operating position of the clamp fitting 34c back and forth.

That is, by combining the forward and backward movement of both movable frames 45, the left and right movement of movable table 49, and the forward and backward movement of movable table 55, five sets of clamp fittings 34,
It is possible to arbitrarily change the position of 34c two-dimensionally along the horizontal plane.

Here, the work table 32 is controlled by controlling the air cylinders 48, 50, 56 to clamp the clamps 34, 34c.
A controller 51 for two-dimensionally changing the position of the welding robot B is mounted, and this controller 51 is also connected to the installed and fixed control device 26, and the controller 27 of the welding robot B is also connected to this control device 26. ,
When information for specifying the work W2 is input to the input unit 26a of the control device 26, the air cylinders 48, 50, and 56 operate based on information input and set in advance to appropriately position and fix the target work W. The clamp fittings 34, 34c are moved to the predetermined positions set in. Also,
Based on the input work information, the welding robot B operates based on a preset program, and automatic welding corresponding to the work W is performed.

Then, similarly to the jig device A1, the jig device A2 can be replaced with the support base 11 of another welding robot B together with the controller 51, and the same operation as described above can be performed.

That is, in a workplace where a plurality of welding robots B of the same specification are installed, the jig devices A1 and A
2 can be arbitrarily moved or replaced, and the jig devices A1 and A2 that are not used can be removed and stored.

(Third example)

FIGS. 15 to 20 illustrate a jig device A3 used in the step of performing various drilling and end milling operations on the revolving frame 4. FIG.

The jig device A3 is supported on the work table 60 in a posture in which the revolving frame 4 as the work W is upright, and is provided with a machining center (MC) as an example of a machine tool.
61. The machining center 61 has a processing chamber 6 provided with a work entrance 64 opened and closed by a shutter 63 in front of a processing machine main body 62.
5, the jig device A3 is configured to move forward and backward between a processing position in the processing chamber 65 and a workpiece attaching / detaching position located outside the processing chamber. ing.

A turntable 66 on which two worktables 60 can be mounted is provided at the work attaching / detaching position. While one worktable 60 carries the work W into the processing chamber, The next work W is mounted on the other work table 60, and one work table 6 that has come out of the processing chamber after finishing the processing.
Then, the work table 60 loaded with the work W is sent to the processing chamber, and the work table which has been carried out is replaced with the next work W. Do.

Next, the detailed structure of the work table 60 will be described. As shown in FIGS. 17 and 18, the work table 60 is formed in a hollow frame shape when viewed from the front, and a pair of left and right movable vertical parts that are independently screwed left and right by forward and reverse rotation of the screw shaft 67. A frame 68 is mounted so as to be able to move left and right along a rail 69. Further, a pair of upper and lower clamp mechanisms 71 which are independently screwed up and down by forward and reverse rotation of a screw shaft 70 are mounted on each movable vertical frame 68 so as to be vertically movable along a rail 72.

Screw shaft 67 for moving movable vertical frame 68 laterally
Each of the work tables 60 is horizontally laid horizontally on the upper part of the work table 60, and one end thereof is provided on a lateral outer side surface of the work table 60. The screw shaft 70 for vertically moving the clamp mechanism 71 is vertically supported by the movable vertical frame 68, and the upper end of each screw shaft 70 is attached to the operation shaft 73 horizontally and horizontally above the worktable 60 by the bevel gear 74, It is interlocked and connected via 75. Here, the bevel gear 74 of the operation shaft 73 is externally mounted on the operation shaft 73 so as to be unable to move laterally with respect to the movable vertical frame 68, to slide horizontally with respect to the operation shaft 73, and to transmit rotation. While allowing the movable vertical frame 68 to move laterally,
The four clamp mechanisms 71 can be independently screwed up and down by the rotation operation.

The clamp mechanism 71 is constructed by mounting a short-axis-shaped clamp member 78 which is retracted by an air cylinder 77 on a movable base 76 which is moved vertically by screw feed. As shown, the clamp member 7
8 is inserted through the opening 79 formed in the bottom plate of the work W from below, and then the clamp member 78 is moved upward or downward, and the locking step portion is formed. After locking 78a to the edge of the opening 79,
By retracting the clamp member 78, the work W is configured to be tightened and fixed in a positioning state.

As shown in FIG. 15 and FIG.
7 and the operation shaft 73 are rotated, and the clamp mechanism 71 is rotated.
An operation console 80 for vertically and horizontally adjusting the position of the camera from the outside is provided. A movable frame 82 is provided above and below each operation table 80 so as to be able to advance and retreat by an air cylinder 81. A drive-side pawl clutch member 84 that is rotated forward and reverse by a motor 83 is provided on the movable frame 82. The drive-side pawl clutch member 84 is configured such that the working table 60 is
0, the driven pawl clutch member 67 provided at the outer ends of the screw shaft 67 and the operating shaft 73.
a, 73a.

Therefore, when the work table 60 is at a predetermined position between the left and right operation tables 80, the movable frames 82 are moved forward to move the respective drive side pawl clutch members 84 to the driven side pawl clutch members. 67a and 73a, and by operating each motor 83 to rotate the screw shaft 67 and the operation shaft 73, the four clamp mechanisms 71
Can be arbitrarily screwed up and down independently.

By inputting work information on the work W to be machined in the controller 85 provided on one work table 60, each clamp mechanism 71 appropriately positions and fixes the work W to be processed. The workpiece W is moved to a predetermined position set for fixing the work W.

[Another Embodiment] The present invention can also be carried out in the following modes.

(1) In the first example, one of the pair of clamp units 13 is installed as a reference clamp unit in a fixed position, and the other clamp unit 13
It can also be configured to move only one.

(2) In the second example, the number of the clamps 34 attached to the movable frame 45 is arbitrary.

(3) In each of the above examples, the control device 2
As the means for inputting the work information in 6, a well-known input means such as key input, bar code input, magnetic card input, etc. may be appropriately selected.

[Brief description of the drawings]

FIG. 1 is an overall side view of a backhoe.

FIG. 2 is a side view of an automatic welding facility using the jig device of the first example.

FIG. 3 is a plan view of an automatic welding facility using the jig device of the first example.

FIG. 4 is a plan view showing the jig device of the first example.

FIG. 5 is a vertical sectional side view of the jig device of the first example.

FIG. 6 is a longitudinal sectional front view showing a state before mounting a work in the jig device of the first example;

FIG. 7 is a longitudinal sectional front view showing a fixed state of the work in the jig device of the first example;

FIG. 8 is a plan view of an automatic welding facility using the jig device of the second example.

FIG. 9 is a plan view showing a fixed state of a work in the jig device of the second example.

FIG. 10 is a plan view showing a state before mounting a work in the jig device of the second example.

FIG. 11 is a longitudinal sectional front view showing a state in which a work is fixed in the jig device of the second example.

FIG. 12 is a longitudinal sectional front view showing a state before fixing a work in the jig device of the second example.

13A is a longitudinal sectional front view of a main part showing a state before positioning of a workpiece in the jig apparatus of the second example. FIG. 13B is a longitudinal sectional front view of a main part showing a workpiece positioning state in the jig apparatus of the second example.

FIG. 14 is a perspective view of an auxiliary member used in the jig device of the second example.

FIG. 15 is a plan view of machining equipment using the jig device of the third example.

FIG. 16 is a front view showing a state in which a work is held in the jig device of the third example.

FIG. 17 is a front view showing a jig device according to a third example;

FIG. 18 is a vertical sectional side view of the jig device of the third example.

FIG. 19 is a side view of a main part of the jig device of the third example, which is longitudinally sectioned.

FIG. 20 is a front view showing a clamp location in the jig device of the third example;

[Explanation of symbols]

 Reference Signs List 3 track frame 4 revolving frame 12 work table 13 clamp unit 16 positioning pin 17 clamp metal 32 work table 34 clamp metal 45 movable frame 60 work table W work

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Onizuka 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Inside Kubota Hirakata Factory Co., Ltd. (72) Inventor Takashi Aiko 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture No. 1 Inside Kubota Hirakata Factory (72) Inventor Tsuneo Okada 1-1 1-1 Nakamiya Oike, Hirakata-shi, Osaka Prefecture Inside Kubota Hirakata Factory (72) Inventor Atsushi Kasai 1-chome Nakamiya Oike, Hirakata-shi, Osaka No. 1-1 Inside Kubota Hirakata Factory (72) Inventor Isao Kuwahara 1-1-1 Nakamiya Oike, Hirakata City, Osaka Prefecture Inside Kubota Hirakata Factory (72) Inventor Kazutoshi Tashiro Nakamiya Oike, Hirakata City, Osaka Prefecture 1-1-1-1 Kubota Hirakata Factory (72) Inventor Shigeyuki Inaoka 1-1-1 Nakamiya Oike, Hirakata-shi, Osaka Company Kubota Hirakata production house F-term (reference) 3C030 DA37 3D114 AA11 AA12 BA02 CA05 DA01 DA17

Claims (6)

[Claims] 1. A workbench on which a temporarily assembled and welded track frame is mounted as a work, is provided with a clamp unit capable of changing its position, the clamp unit includes a positioning pin inserted into a knock hole formed in the work, It is characterized in that the work table is provided with a clamp fitting for fastening and fixing the work on the work table, and a drive means for operating the clamp, and a drive means for changing the position of the clamp unit along the work table surface. Jig device for assembling self-propelled work machines. 2. A control device according to claim 1, further comprising a control unit for automatically moving the clamp unit to a preset position corresponding to the work to which the work information has been input by inputting the work information. A jig device for assembling a traveling work machine. 3. A pair of movable frames are horizontally arranged in parallel on a work table supporting a temporarily assembled and welded revolving frame as a work, and each movable frame can be moved and adjusted by a driving means in the movable frame parallel direction. In each movable frame, a clamp fitting for locking a work is provided on each movable frame so as to be movable in a horizontal direction perpendicular to the moving direction of the movable frame. A jig device for assembling a self-propelled working machine, wherein the jig device is configured to be movable by a driving means in a direction. 4. A control means for automatically moving each movable frame and clamp to a preset position corresponding to the work to which the work information has been input, by inputting the work information. 3. A jig device for assembling a self-propelled work machine according to 3. 5. A work table which holds a track frame or a turning frame as a work is configured to be capable of moving forward and backward between a processing position of a machining machine and a work detaching position deviated from the processing position. A jig device for assembling a self-propelled work machine, wherein a plurality of clamp members for fixing a work are provided on a table so as to be movable and adjustable by driving means in two orthogonal directions. 6. The apparatus according to claim 5, further comprising control means for automatically moving each clamp member to a preset position corresponding to the work to which the work information has been input by inputting the work information. A jig device for assembling self-propelled work machines.