JP2507193Y2 - Work transfer device with adjustable work arm - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention is capable of holding a work of any size and rotating in the work conveying direction in the work assembling process to, for example, mount a part on the bottom of a work or perform machining. It relates to a device for making it possible to apply.

[0002]

2. Description of the Related Art Conventionally, as a device capable of inclining a work according to each work when the work is transported and parts are incorporated into the work or processed in the work assembling process, Japanese Patent Publication No. There is a transport device described in Japanese Patent No. 38393. In this carrying device (see FIG. 16), after the arcuate hanger 22 provided on the moving movable frame 21 is engaged with the turning means 23 installed on the floor G, the turning means 23 operates. The hanger 22 is tilted so that the work W is tilted.

[0003]

However, such a transfer device 20 can tilt the work only within the range of the length of the hanger 22 (about 45 degrees in FIG. 16), and the work bottom is processed. In a processing step to be performed, there is a problem that the work W cannot be tilted to an angle (for example, about 90 degrees) at which the worker can easily work.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a traveling frame, a pair of workpiece rotating arms that rotate about a horizontal axis intersecting the traveling direction of the traveling frame, and the horizontal axis are provided.
One that supports and traverses independently on the traveling frame.
A rotating arm moving mechanism including a pair of moving frames, a pair of holding mechanisms included in the pair of work rotating arms for holding both sides of the work, and a pair of rotating units for rotating the pair of work rotating arms. And a rotation mechanism,
Connect the end to the drive shaft through the universal joint and the other end to the universal joint.
Via the drive gear shaft that drives the workpiece rotation arm to rotate.
Movement of the rotating arm that has a spline shaft part connected
The above-mentioned problem is solved by a device having an intermediate transmission shaft portion that transmits the driving force following the above.

[0005]

[Action] work conveying apparatus, scaling adjust the distance between the pair of works rotating arm on the size of the workpiece by the rotation arm moving mechanism, or a pair of the distance between the pivot arm
While holding, adjust the movement to the left and right according to the work position.
After that, the work is held on the work rotating arm by the holding mechanism, and is transported to the work assembling step by traveling of the traveling frame. In the work assembly process, the work transfer device is stopped, and the work rotating arm is rotated downward by the rotation mechanism to tilt the work to a desired angle at which the worker can easily perform the assembly work. After the work assembling work is completed, the work transfer device rotates the work rotation arm upward,
The work is conveyed to the next process.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. The work transfer device 30 transfers, for example, an automobile body (hereinafter referred to as “work”) in an automobile production line, stops the assembly process, rotates the work W in the work transfer direction by about 90 degrees, and the worker It is a device that facilitates the assembly or processing of the work bottom WB. The work transfer device 30 includes a traveling frame 31 and
Horizontal axes 32, 3 intersecting the traveling direction of the traveling frame 31
2, a pair of rotation arms (work rotation arms) 33, 33 that rotate in the vertical direction (the vertical direction in FIG. 1) about the horizontal shafts 32, 32, and a pair of rotation arms 33, 3
3, a pair of holding mechanisms 34, 34 provided on the both sides of the work W, a pair of rotating mechanisms 35, 35 for rotating the pair of rotating arms 33, 33, and a pair of rotating arms 3.
A pair of rotating arm moving mechanisms 36 for moving the 3, 33,
36 and.

The traveling frame 31 has a shape like a rectangular frame (see FIG. 3) and constitutes a part of the frame of the carrier 40 traveling on the monorail R laid at a high place. The carrier 40 (see FIG. 1) has a drive wheel 42 rotated by a drive motor 41 and a driven wheel 43. The traveling frame 31 may be provided on a chain conveyor (not shown) that circulates and may be run by pulling the chain. Running frame 31 (Fig. 2,
Guide rollers 44, 44 are provided on both sides (see FIGS. 9 and 10) for preventing vertical swinging of both ends of the traveling frame 31. The guide rollers 44, 44 can run on a pair of guide rails GR, GR laid in parallel with the monorail R.

Further, the traveling frame 31 has movable frames 45, 45 (see FIG. 3) and a rotating arm moving mechanism 3.
6, 36 and a pair of rotation mechanisms 35, 35 are provided. Movable frame 45 (FIG. 3, FIG. 11 to FIG. 1)
3), the traveling frame 3 is formed by the four rollers 46.
1 moving frame 47, and moving frame 47
It is configured with a substantially U-shaped hanging frame 48 which is provided in a hanging state. A horizontal shaft 32 orthogonal to the traveling direction of the traveling frame 31 is provided at the lower end of the hanging frame 48. The horizontal shaft 32 has a rotating arm 33 which will be described later.
Is rotatably provided. Rotating arm moving mechanism 36
Has a cylinder 50. The cylinder 50 is provided horizontally on the traveling frame 31 and is connected to the moving frame 47. Therefore, when the cylinder 50 is operated,
The movable frame 45 moves on the traveling frame 31, and the position of the rotating arm 33 can be adjusted in the left-right direction in FIGS. 2 and 3. Since a pair of rotating arm moving mechanisms 36 are provided, the space between the pair of rotating arms 33 is expanded / reduced relative to each other according to the size of the work, or the space is kept constant according to the position where the work is placed. You can move it to the left or right while still doing it.

The rotation mechanism 35 includes a drive shaft 51, a gear box 52 for converting the rotation transmission direction by 90 degrees, and a first universal joint 5 of an intermediate transmission shaft portion 54 for the rotational force of the motor M with a reduction gear.
3, spline shaft portion 55, via the second universal joint 56, Wa
This mechanism is a mechanism for transmitting the rotation arm to the shaft of a drive gear 60 for rotating the rotation arm, and rotating the rotation arm 33 axially supported by the horizontal shaft 32 in the vertical direction. Motor M, the drive shaft 51, that has gear box 52 is provided on the traveling frame 31.
Consists of a gear 57 bevel and drive Dohaguruma 60 and fan-shaped driven gear 61, the drive gear 60 is rotatably suspended frame 48 of the movable frame 45, the driven gear 61 rotates the arm 33
Are provided integrally with each other. The first and second universal joints 53 and 56 and the spline shaft portion 55 are provided when the rotating arm moving mechanism 36 moves the movable frame 45 and the rotating arm 33 in the left and right directions in FIGS. 2 and 3 (in FIG. 2). ,
For example, the position of the imaginary line), the inclination of the intermediate transmission shaft portion 54, and the change in the distance between the bevel gear 57 and the gear box 52 are allowed.

The rotating mechanism 35 described above is provided as a pair corresponding to the pair of rotating arms 33, 33. However, the speed reducer-equipped motor M is shared. Accordingly, the pair of pivot mechanisms 35, 35 for rotating the pair of pivot arms 33, 33 by a common motor M, Ru can be synchronized rotating the pair of pivot arms 33, 33.

The rotating arm 33 (see FIGS. 4, 14 and 15)
1) centering on the horizontal axis 32 on the drooping frame 48.
4 It is equipped rotatably in the vertical direction, which is the direction of the middle arrow E,
A driven gear 61 and a holding mechanism 34 described below are provided.

The holding mechanism 34 (see FIGS. 4 to 8) includes a vertical tilting arm (workholding arm) 70 and a horizontal tilting arm (workholding arm) which are pivotally supported by the rotating frame 33.
71 is a mechanism for holding both sides of the work W. The vertical tilting arm 70 includes rubber pads 78, 7
8 has a pair of pressing pieces 72, 72, and is tilted in the up-down direction (up-down direction in FIGS. 4 and 5) by the upward cylinder 73. The left and right tilting arm 71 has a pair of pressing pieces 74, 74 provided with rubber pads 79, 79, and is horizontally moved by a horizontal cylinder 75 (left and right direction in FIG. 4 and up and down direction in FIG. 7). ). Code 7
Reference numerals 6 and 77 denote axes. Therefore, the holding mechanism 34
The cylinders 73 and 75 are operated to move the vertical tilt arm 70.
5 and 7, the left and right tilting arms 71 are tilted from the position indicated by the imaginary line to the position indicated by the solid line, and the pressing pieces 72, 74 are moved so as to spread relative to each other. This allows the holding mechanism 34 to hold the automobile body from the inside of the window frame hole WD. It should be noted that although one vertical and one horizontal tilting arms are provided, it is needless to say that more arms may be provided. Further, although the holding mechanism is a mechanism for holding the work by expanding the tilting arm, it may be a mechanism having a holding structure (not shown) for grasping the plate thickness portion of the work.

Next, the operation of the entire carrier device 30 will be described. First, the transport device 30 is operated by the drive motor 41 in an empty state.
Runs on the rail R to the work loading place. The work W is previously placed on a lifter (not shown) on the floor G. At this time, the transfer device 30 moves the pair of movable frames 45, 45 and the pair of rotating arms 33, 33 to the positions indicated by the imaginary lines in FIG. 2 so that the tip ends of the up-down tilting arm 70 and the left-right tilting arm 71. Be careful not to hit W. Further, the vertical and horizontal tilting arms 70 and 71 are at the positions indicated by the solid lines in FIGS .

The transfer device 30 includes a pair of rotating arms 33,
The work 33 stops at a position facing both sides of the work W. After that, the rotating arm moving mechanism 36, 36 moves the pair of movable frames 45, 45 and the pair of rotating arms 33, 33 from the position of the imaginary line in FIG. , 71 are inserted into the window frame holes WD of the automobile body. The up / down and left / right tilting arms 70 and 71 are moved by the cylinders 73 and 75 as shown in FIG.
It rotates from the position of the imaginary line of FIG. 7 to the position of the solid line, and the pressing pieces 72 and 74 are attached to a plurality of inner side surfaces where the window frame holes WD intersect.
The both sides of the work W are held by bringing them into contact with each other. After that, the transfer device 30 transfers the work W to the work assembly process.

The transfer device 30 that has transferred the work W to the assembly process is stopped, and the pair of rotating mechanisms 3 is driven by the motor M.
5, 35 are actuated to rotate the driven gear 61 in the direction of arrow A in FIG. Since the driven gear 61 is integrated with the rotating arm 33, the rotating arm 3 is rotated along with the rotation of the driven gear 61.
3 is also in the direction of arrow A about the horizontal axis 32, that is, the conveying device 3
It turns to run 0. This rotation angle is about 90 degrees,
Depending on the shape of the driven gear 43, a rotation angle of 90 degrees or more can be obtained. The rotation angle is detected by the sensor 80 (see FIG. 1). As a result, the work bottom portion WB, which has been opposed to the floor G until now, becomes substantially vertical to the floor G. Moreover, since the horizontal shaft 32, which is the center of rotation of the work W, is provided near the rear lower corner, which is offset from the center of the side surface of the work, the work W descends to a height at which the worker can easily perform the assembly work. .

After that, the worker enters the work transfer path of the work transfer device 30 and assembles parts on the work bottom portion WB or processes them. After the assembly process is completed, the work transfer device 30 causes the rotation mechanism 33 to rotate the rotation arm 33 in the direction opposite to the arrow A in FIG. Drive to. At this time, the work W is at a higher position than in the work assembly process.

Therefore, the work transfer device 30 has the following advantages. Since the work W rotates around the horizontal axis, the rotation angle of the work W can be increased. As a result, the work W can be tilted at a desired angle at which the work W can be easily assembled or processed, and the efficiency of the work can be improved. In particular, the work of assembling the bottom of the work is facilitated. The work W is held on the rotating arm by the vertical and horizontal tilting arms that move in and out of the work and spread apart in the work, and therefore rotate when the rotating arm is rotated. It is possible to prevent the work W from being displaced relative to the arm. The rotating arm can be moved in a direction intersecting the work transfer direction of the work transfer device (left-right direction in FIG. 2) by the rotation arm moving mechanism, so that works of various sizes can be moved. Can be held. Since the horizontal shaft is provided in the vicinity of the lower right corner deviated from the center of the side surface of the work, the work can be rotated to a low position when assembling and to a high position when transporting. As a result, the work of assembling the work can be easily performed, and the danger at the time of carrying the work can be avoided, so that the work can be effectively used in the work carrying path.

[0018]

The work transfer device of the present invention has the following effects. (1) Since the work rotates around the horizontal axis, the rotation angle of the work can be increased. As a result, the work can be performed by inclining the work at a desired angle that facilitates the work of assembling or working the work, thus improving the work efficiency. (2) The rotating arms can be independently moved by the rotating arm moving mechanism in a direction intersecting the work transfer direction of the work transfer device (for example, the left-right direction in FIG. 2). Therefore, between the pair of rotating arms
Workpieces of various sizes can be held by expanding and contracting the distance, and the distance between the rotating arms can be maintained.
Since it can be moved left and right while holding it, the work position can be
Even if it is not fixed, it moves right above the work piece and holds it securely
it can. (3) Moreover, both ends are attached to the transmission shaft of the rotation driving force of the rotation arm.
Has an expansion spline shaft that connects the transmission shaft with a universal joint.
Since the intermediate transmission shaft part is connected,
Intermediate transmission shaft part even if the arm expands / reduces or moves left / right
Can follow and bend to move
The driving force from the drive shaft is simultaneously transmitted to each rotating arm.
And the separated rotating arms form a pair of rotating arms.
Rotation in synchronization with the
It is possible to perform actual work rotation.

[Brief description of drawings]

FIG. 1 is a front view of a work transfer device according to an embodiment of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a plan view of FIG. 2;

FIG. 4 is a front view of a holding mechanism.

5 is a left side view of FIG. 4. FIG.

FIG. 6 is a plan view of FIG.

7 is a cross-sectional view taken along line 7-7 of FIG.

8 is a cross-sectional view taken along the line 8-8 of FIG.

FIG. 9 is a plan view of a traveling frame.

FIG. 10 is a side view of the traveling frame seen from the front side in FIG.

FIG. 11 is a front view of a movable frame.

FIG. 12 is a left side view of FIG. 11.

FIG. 13 is a plan view of FIG.

FIG. 14 is a front view of a rotating arm.

FIG. 15 is a left side view of FIG.

16 is a side view of a conventional work transfer device, and FIG.
It is a figure equivalent to.

[Explanation of symbols]

W work 30 work transfer device 31 traveling frame 32 horizontal shaft 33 work rotation arm (rotation arm) 34 holding mechanism 35 rotation mechanism 36 rotation arm movement mechanism 70 vertical tilting arm (workholding arm) 71 left and right tilting arm (workpiece Holding arm)

Continuation of front page (72) Inventor Fusao Yoshiha 1-3-1, Shimotsuruma, Yamato-shi, Kanagawa Inside Body Industry Co., Ltd. (56) Reference JP-A-1-313216 (JP, A) 32574 (JP, U) Actual development Sho 59-128458 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A traveling frame, a pair of workpiece rotating arms that rotate about a horizontal axis that intersects the traveling direction of the traveling frame, and the traveling frame that supports the horizontal axis.
A rotating arm moving mechanism including a pair of moving frames independently traversing above, a pair of holding mechanisms included in the pair of workpiece rotating arms for holding both sides of the work; And a pair of rotation mechanisms for rotating the workpiece rotation arm , the one end of which is driven through a universal joint.
Workpiece rotation arm connected to the shaft and the other end through a universal joint
It has a spline shaft that is connected to the drive gear shaft that rotates the
The driving force is transmitted following the movement of the rotating arm.
Work transfer device with an intermediate transmission shaft .