JPH04138014U - Workpiece conveyance device that allows for high-level conveyance and low-level assembly. - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] A device that changes the height of the workpiece to a lower place in the workpiece assembly process and to a higher place in the workpiece transfer process, and also rotates the workpiece in the workpiece transfer direction in the workpiece assembly process. to provide. [Configuration] The workpiece conveyance device 30 includes a traveling frame 31
a pair of work rotation arms 33 that rotate around an axis 32 that intersects the traveling direction of the traveling frame; and a pair of holding mechanisms 35 that are provided on the pair of work rotation arms and hold both sides of the work. , a pair of rotation mechanisms 35 for rotating the pair of workpiece rotation arms, and the shaft is provided near a lower corner of a side surface of the workpiece parallel to the traveling direction, and the rotation mechanism 35 rotates the workpiece rotation arm. The work can be held on the rotating arm by the holding mechanism and rotated by the rotating mechanism. The workpiece rotates around an axis located off the center of the side of the workpiece, so it takes two positions: a high place and a low place.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention allows workpieces to be placed at low locations during the workpiece assembly process, and at high locations during the workpiece transport process. In addition, in the workpiece assembly process, the workpiece is transferred in the workpiece transfer direction. For example, by rotating the The present invention relates to a device for making it possible to do this.

0002

[Conventional technology]

Conventionally, the workpiece was transported and parts were assembled into the workpiece in the workpiece assembly process. A device that can tilt the workpiece according to each task when processing. As an example, there is a conveying device described in Japanese Patent Publication No. 54-38393. This conveyance device (see FIG. 16) consists of an arcuate hub provided on a moving movable frame 21. After the ringer 22 is engaged with the rotation means 23 installed on the floor G, this rotation means 23 When the hanger 22 is operated, the hanger 22 is tilted, and the workpiece W is tilted. Furthermore, this conveyance device 20 is used both in the workpiece conveyance process and in the workpiece assembly process. The workpieces are transported at approximately the same height even when the

0003

[Problem that the idea aims to solve]

However, such a conveying device 20 can only work within the length of the hanger 22. The workpiece cannot be tilted (approximately 45 degrees in Figure 16), for example, when assembling the bottom of the workpiece. In the process, a worker works on the bottom of the workpiece until it reaches a vertical position, that is, the workpiece is The problem is that it cannot be rotated approximately 90 degrees. Furthermore, since the conveyance height of the workpiece is always constant in this conveyance device 20, the workpiece conveyance height is always constant. During the workpiece conveyance process, workers may enter the workpiece conveyance path or Since it is not possible to install various necessary equipment, we are trying to make effective use of the workpiece conveyance path. There is also the problem that it cannot be done.

0004

[Means to solve the problem] The present invention has a running frame and an axis centered on the axis that intersects the running direction of the running frame. a pair of work rotation arms that rotate to A pair of holding mechanisms that hold both sides of the workpiece and a pair of workpiece rotation arms that rotate the workpiece. and a pair of rotation mechanisms that rotate the shaft, and the shaft is rotated under the side of the work parallel to the traveling direction. The above-mentioned problem is solved by a device provided near the corner.

[0005]

[Effect]

The workpiece transfer device holds the workpiece on the workpiece rotation arm by a holding mechanism, The workpiece is transported to the assembly process by the traveling frame. In the workpiece assembly process, the workpiece transport device stops and the rotating mechanism moves the workpiece. Rotate the rotating arm downward until the worker can move it to the desired angle that makes assembly work easier. Tilt the arc. At this time, the workpiece is located near the lower corner of the side surface of the workpiece, which is offset from the center. Because it rotates around a shaft attached to it, it can rotate from a high place to a low place. After the workpiece assembly work is completed, the workpiece transfer device moves the workpiece rotation arm upward. The workpiece is rotated to return it to its original height and transported to the next process.

[0006]

【Example】

Hereinafter, embodiments of the present invention will be described based on the drawings. The workpiece conveyance device 30 is used, for example, in an automobile production line to transport an automobile body ( Hereinafter, it will be referred to as "work". ) is transported, stopped during the assembly process, and the workpiece W is transported. The workpiece is rotated approximately 90 degrees in the transport direction, and the worker assembles or processes the workpiece bottom WB. This is a device that makes work easier. The workpiece conveyance device 30 includes a traveling frame 31 and a traveling direction of the traveling frame 31. Intersecting horizontal axes (axes) 32, 32 and vertical directions centered around the horizontal axes 32, 32 (Fig. A pair of rotating arms (work rotating arms) 33 that rotate in the vertical direction in the figure) , 33, and a pair of rotating arms 33, 33 that hold both sides of the workpiece W. A pair of holding mechanisms 34, 34 and a pair of rotations for rotating the pair of rotation arms 33, 33. A pair of rotating arms that move the moving mechanisms 35, 35 and a pair of rotating arms 33, 33. It has a moving mechanism 36, 36.

[0007] The traveling frame 31 has a rectangular frame-like shape (see Figure 3) and is suitable for use in high places. It constitutes a part of the frame of the carrier 40 that runs on the monorail R that has been laid. ing. The carrier 40 (see FIG. 1) has a drive wheel 42 rotated by a drive motor 41 and , and a driven wheel 43. Note that the running frame 31 is a chain that circulates. It may also be provided on a conveyor (not shown) and run by being pulled by a chain. On both sides of the running frame 31 (see FIGS. 2, 9, and 10), the running frame 31 Guide rollers 44, 44 are provided to prevent both ends of the roller from swinging in the vertical direction. Ga The idle rollers 44, 44 are a pair of guide rails G laid parallel to the monorail R. It is now possible to run on R and GR.

[0008] Furthermore, the traveling frame 31 includes movable frames 45, 45 (see FIG. 3) and rotating frames 45, 45 (see FIG. 3). A pair of moving arm moving mechanisms 36, 36 and a pair of rotating mechanisms 35, 35 are provided, respectively. ing. The movable frame 45 (see FIGS. 3 and 11 to 13) is moved by four rollers 46. The movable frame 47 moves on the traveling frame 31 and the movable frame 47 is vertically moved. It is composed of a substantially U-shaped hanging frame 48 that is placed in a lower position. drooping flare A horizontal shaft 32 is provided at the lower end of the frame 48 and is perpendicular to the traveling direction of the traveling frame 31. It is being A rotating arm 33, which will be described later, is rotatably provided on this horizontal shaft 32. ing. The rotating arm moving mechanism 36 has a cylinder 50. The cylinder 50 is It is provided horizontally on the frame 31 and connected to the movable frame 47. Therefore, when the cylinder 50 is actuated, the movable frame 45 moves to the traveling frame. 31, and adjust the position of the rotating arm 33 in the left-right direction in FIGS. 2 and 3. can do. Since a pair of rotating arm moving mechanisms 36 are provided, it can be adjusted according to the size of the workpiece. The pair of rotating arms 33 can be moved toward and away from each other, or the position where the workpiece is placed can be moved. You can move it left and right while keeping the interval constant according to the .

[0009] The rotation mechanism 35 transfers the rotational force of the motor 50 with a reduction gear to the rotation of the first shaft 51. A gear box 52 that changes the transmission direction by 90 degrees, a first universal joint 53, and a second shaft It is transmitted to the bevel gear 57 through the spline shaft 54, the spline shaft 55, and the second universal joint 56. , is a mechanism for vertically rotating a rotating arm 33 supported by a horizontal shaft 32. The motor 50, the first shaft 51, and the gear box 52 are installed on the traveling frame 31. I'm being kicked. The spline shaft portion 55 has a plurality of protrusions (not shown) formed in the longitudinal direction of the outer circumference. A second shaft 54 and a groove (not shown) into which this shaft enters and engages the protrusion are provided. A shaft 58 of a second universal joint 56 having a hole (not shown) formed in the longitudinal direction, Engaged by protrusions and grooves, capable of transmitting rotational force, and mutually movable in the longitudinal direction It is a mechanism that allows connection. The bevel gear 57 is composed of a drive gear 60 and a fan-shaped driven gear 61. 0 is rotatably attached to the hanging frame 48 of the movable frame 45, and the driven gear 61 is attached to the rotating arm. They are each provided integrally with the frame 33. The first and second universal joints 53 and 56 and the spline shaft portion 55 are a rotating arm moving mechanism. 36 moves the movable frame 45 and the rotating arm 33 in the left and right direction in FIGS. 2 and 3. (for example, the position of the imaginary line in FIG. 2), the inclination of the second shaft 54 and , provided to accommodate changes in the distance between the bevel gear 57 and the gear box 52. It is.

0010 The above rotating mechanism 35 is provided with a pair corresponding to the pair of rotating arms 33, 33. There is. However, the motor 50 with a speed reducer is shared. Therefore, a pair of times The moving mechanisms 35, 35 rotate the pair of rotating arms 33, 33 by a common motor 50. For this purpose, the pair of rotating arms 33, 33 can be rotated synchronously. Note that the motor with reducer is not shared, but is installed separately on the hanging frames 48, 48, and controlled. The rotating arms 33 may be rotated synchronously by a control circuit. In this case, the drive gear The first and second shafts 51, 54, the first and second shafts can be directly rotated. The structure can be simplified by omitting the joints 53, 56, etc.

[0011] The pivot arm 33 (see FIGS. 4, 14, and 15) is mounted horizontally on a hanging frame 48. It is provided so as to be rotatable in the vertical direction, which is the direction of arrow E in FIG. A gear 61 and a holding mechanism 34, which will be described next, are provided.

0012 The holding mechanism 34 (see FIGS. 4 to 8) is a vertically tilting mechanism pivotally supported by the rotating frame 33. Moving arm (work holding arm) 70 and left/right tilting arm (work holding arm) 71 It is a mechanism that holds both sides of the workpiece W. The vertically tilting arm 70 is a pair of pressing pieces provided with rubber pads 78, 78. 72, 72, and the vertical direction (in FIGS. 4 and 5) by the upward cylinder 73. It is designed to tilt in the vertical direction (as shown in the figure). The left and right tilting arm 71 is made of rubber. It has a pair of pressing pieces 74, 74 provided with pads 79, 79, and has a horizontal cylinder. 75 in the left-right direction (in the left-right direction of the figure in Figure 4, in the vertical direction of the figure in Figure 7) ). Reference numerals 76 and 77 indicate axes. Therefore, the holding mechanism 34 operates each cylinder 73, 75, and the vertical tilting arm 70 and the left-right tilting arm 71 from the position of the imaginary line to the position of the solid line in FIGS. 5 and 7. The pressing pieces 72 and 74 are moved to spread apart from each other. By this , the holding mechanism 34 can hold the automobile body from inside the window frame hole WD. . Note that one vertical and one horizontal tilting arm is provided, but more than one tilting arm is provided. Of course, it may be provided. Furthermore, the holding mechanism is a mechanism that holds the workpiece by expanding the tilting arm. However, even if the mechanism has a clamping structure (not shown) that grips the thick part of the workpiece, good.

[0013] Next, the overall operation of the transport device 30 will be explained. First, the transport device 30 is moved to the workpiece loading place by the drive motor 41 in an empty state. Run on rail R. The workpiece W is placed in advance on a lifter (not shown) on the floor G. I am forced to do so. At this time, the transport device 30 includes a pair of movable frames 45, 45 and a pair of rotating arms. Move the arms 33, 33 to the position shown in the imaginary line in FIG. Make sure that the tip of the tilting arm 71 does not hit the workpiece W. Also, up and down, left The right tilting arms 70, 71 are tilted to the position shown by the solid line in FIGS. 5 and 7.

[0014] The transfer device 30 has a pair of rotating arms 33, 33 facing each other on both sides of the workpiece W. Stop at the position. Thereafter, the rotating arm moving mechanisms 36, 36 are connected to the pair of movable frames 45, 45. Move the pair of rotating arms 33, 33 from the position indicated by the imaginary line in Fig. 2 to the position indicated by the solid line. , press the pressing pieces 72, 74 of the vertical and horizontal tilting arms 70, 71 onto the window frame of the automobile body. Insert into hole WD. The vertical and horizontal tilting arms 70, 71 are operated by respective cylinders 73, 75 as shown in FIG. 7 from the imaginary line position to the solid line position, and press the pressing pieces 72 and 74 into the window frame hole WD. Press the inside of the corner and hold both sides of the workpiece W. After that, the transport device 30 The machine transports the workpiece to the workpiece assembly process.

[0015] The transport device 30 that transported the workpiece W to the assembly process is stopped and is started by the motor 50. to operate the pair of rotation mechanisms 35, 35, and rotate the driven gear 61 in the direction of arrow A in FIG. make it turn Since the driven gear 61 is integrated with the rotating arm 33, the rotation of the driven gear 61 is Along with the rotation, the rotating arm 33 also rotates in the direction of arrow A around the horizontal axis 32, that is, in the direction of the conveying device. Rotate to 30 runs. This rotation angle is approximately 90 degrees, but due to the shape of the driven gear 43, Therefore, a rotation angle of 90 degrees or more can be obtained. The rotation angle is determined by sensor 80 (Fig. (see). As a result, the workpiece bottom WB, which was previously facing the floor G, is now approximately becomes vertical. Moreover, the horizontal axis 32, which is the center of rotation of the workpiece W, is located on the side of the workpiece. Because the workpiece W is mounted near the lower right corner off-center, it is difficult for the worker to assemble the workpiece W. It comes down to a height that makes it easy to do standing work.

[0016] After that, the worker enters the workpiece conveyance path of the workpiece conveyance device 30, and the workpiece bottom W Incorporate parts into B or perform processing. After the assembly processing is completed, the workpiece transfer device 30 moves the rotating arm 3 by the rotating mechanism 35. 3 in the direction opposite to the arrow A in Figure 1, and raise the workpiece W to its original state. Then, the machine moves on to the next process. At this time, the workpiece W is in the workpiece assembly process. in a higher position.

[0017] Therefore, the workpiece conveyance device 30 has the following advantages. Since the work W is designed to rotate around the horizontal axis, the rotation of the work W The angle can be made larger. This allows assembly or machining of the workpiece W. The workpiece W can be tilted to a desired angle that is easy to perform, increasing the efficiency of assembly or processing work. can be improved. In particular, it becomes easier to assemble the bottom of the workpiece. The workpiece W is an upper and lower part that moves in and out of the workpiece and spreads out from each other within the workpiece. , is held on the pivot arm by the horizontal tilting arm, so that the To prevent the workpiece W from shifting relative to the rotating arm when the rotating arm is rotated. I can do that. The rotating arm uses a rotating arm movement mechanism to transport the workpiece of the workpiece transfer device. It is now possible to move in the direction that intersects the direction (left and right in Figure 2). Because of this, it is possible to hold workpieces of various sizes. Since the horizontal axis is located near the lower right corner off the center of the side of the workpiece, Therefore, rotate the workpiece to a lower position when assembling and to a higher position when transporting. can be set. This makes it easier to assemble and process workpieces. At the same time, it is possible to avoid danger when transporting workpieces, and to avoid damage to the workpiece transport path. Effective use can be achieved.

[0018]

[Effect of the idea]

The workpiece conveyance device of the present invention has the following effects. Since the workpiece rotates around the axis, the rotation angle of the workpiece can be increased. can be reduced. This makes it easy to assemble or process workpieces. You can tilt the workpiece to the desired angle and perform assembly processing, improving work efficiency. be able to. Because the horizontal axis is located near the bottom corner of the side of the workpiece, off center. , place the workpiece in a low position when performing assembly or processing work, and place it in a high position when transporting. The arc can be rotated. This allows you to assemble or process the workpiece. This makes it easier to carry out the work, and also avoids dangers when transporting workpieces. , it is possible to effectively utilize the inside of the workpiece conveyance path.

[Brief explanation of drawings]

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

FIG. 2 is a left side view of FIG. 1.

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

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

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

FIG. 6 is a plan view of FIG. 5;

7 is a sectional view taken along arrow 7-7 in FIG. 5. FIG.

8 is a sectional view taken along arrow 8-8 in FIG. 4. FIG.

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

FIG. 10 is a side view of the traveling frame when FIG. 9 is viewed from the front side.

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

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

FIG. 13 is a plan view of FIG. 12;

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

FIG. 15 is a left side view of FIG. 14;

FIG. 16 is a side view of a conventional workpiece conveyance device, and FIG.
This is a diagram corresponding to .

[Explanation of symbols]

W work 30 Workpiece conveyance device 31 Traveling frame 32 Horizontal axis (axis) 33 Work rotation arm (rotation arm) 34 Retention mechanism 35 Rotation mechanism 70 Vertical tilting arm (work holding arm) 71 Left and right tilting arm (work holding arm)

Continuation of front page (72) Creator Fusao Yoshiba 1-3-1 Shimotsuruma, Yamato City, Kanagawa Prefecture Car Within Tai Kogyo Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A traveling frame, a pair of workpiece rotation arms that rotate about an axis intersecting the traveling direction of the traveling frame, and a pair of workpiece rotation arms that are provided on the pair of workpiece rotation arms and that hold both sides of a workpiece. and a pair of rotation mechanisms for rotating the pair of workpiece rotation arms, and the shaft is provided near a lower corner of a side surface of the workpiece parallel to the traveling direction. , workpiece conveyance device.