JPS60150922A - Tentative assembly work apparatus for bolts, etc. - Google Patents

Abstract

PURPOSE:To permit the automatic and proper screwing-in of bolts in the initial state by allowing the screw-part center into of a workpiece, axis line of rotary shaft, and the bolt axis line before screwing-in the bolts to coincide with each other by the pushing of a magnetic absorbing part, in the assembly work for a speed change gear for car, etc. CONSTITUTION:A bolt V is dropped by the retreat of a piston rod 6, onto a bolt receiving part 10 raised by a feeding cylinder 9, and then lowered until it is allowed to coincide with a center line X and absorption-held onto the front edge surface of a magnetic absorbing member 23 by the extension of a sliding cylinder 15. The first and the second position adjusting cylinders 31 and 35 are operated alternately to transfer the bolt V on the front-edge surface of the magnetic absorbing member 23, and the axis line is accodded with the screw axis line (x) of a workpiece W. When a slidable cylinder 15 is extended further, and a rotary shaft 22 is turned by a motor 17, the bolt V is screwed into the front surface of the magnetic absorbing member 23 in a proper posture and in the state where the axis line coincides with the center line of the screw part M of the workpiece, W, and tentative assembly is performed.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is useful for assembling and fixing workpiece Hepol Hi on the assembly line of various types of JA machines because the work is done automatically and quickly. The attachment relates to a temporary assembly device for bolts, which performs temporary assembly by screwing a bolt a into a threaded portion of a workpiece by, for example, about 2 to 3 thousand pitches at the beginning of work.

(Prior art) For example, on an assembly line that continuously performs assembly work to assemble and fix parts into the case of an automobile transmission, etc., the work process involves assembling bolts such as bolts and plugs to the workpiece. Since the number of times required for tightening is large, and torque management is required for tightening, it is desirable to automate the process with a machine rather than relying on manual labor to perform the work quickly and accurately.

However, most of the conventional work for assembling bolts onto workpieces is done using a portable rotating movable tool, and although bolts are tightened automatically using power from an air motor, etc. Assembling bolts and other workpieces relies on manual means to move them into position and adjust their positioning to the screwed-in position. This is because when automatically assembling bolts to a workpiece, if the bolts to be screwed in are tilted relative to the threaded part of the workpiece or are in a position that deviates from the normal screwing position, the bolts may Initial screw engagement with the threaded portion of the workpiece may not be possible, or the center line of the threaded portion of the workpiece and the axis of the rotating shaft of the rotary movable crab tool that screws into the workpiece while rotating bolts, and this rotation. If the axes of the bolts held by the movable crab tool or other bolt holders do not roughly match the axis of the bolts just before they are screwed in, the bolts cannot be assembled properly and may cause damage to the workpiece, etc. Furthermore, there are problems such as the washer, which is normally indispensable for bolt assembly, tends to prevent the Pol HW from being screwed into the threaded part of the workpiece, and these problems still exist. This is because no effective measures have been taken to solve the problem.

(Purpose of the Invention) In view of the above, the present invention provides a method for assembling and fixing bolts to a work by controlling and arranging the bolts in the correct screwing position and in the correct screwing position at the initial stage of the work. Temporary assembly of bolts that allows the initial screwing into the workpiece to be performed automatically without relying on human means, and subsequent tightening of bolts can be performed properly and quickly. The purpose is to serve the equipment.

(Structure of the Invention) A temporary assembly device for bolts according to the present invention is provided with a magnetic adsorption portion having a plane substantially perpendicular to the axis of the rotating wheel at the tip of a rotating shaft that moves forward and backward. An assembly rotation means, a supply means for supplying bolts to the plane of the magnetic attraction part, and the bolts held by attraction to the plane of the magnetic attraction part are moved on the plane to adjust their positions. The center line of the threaded part of the work into which bolts are screwed, the axis of the rotating shaft, and the position adjustment means are supplied by the supply means and held by adsorption on the flat surface of the magnetic attraction part, and the flat surface Align the axes of the bolts whose positions have been adjusted above,
Proceed the rotation axis toward the workpiece and rotate it,
Temporary assembly of bolts to the threaded portion of the workpiece is performed. With this configuration, the screwing posture and screwing position of bolts into the workpiece can be made appropriate without relying on human means, and the initial screwing of the port t-i into the threaded part of the workpiece can be adjusted properly. This means that the input can be carried out reliably.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
3 to 3 show an example of a temporary assembly device for bolts according to the present invention. Reference numeral 1 shown in Fig. 2 is a hopper for bolts, 2 shown in Figs. The washers J from 2 are sent to the washer mounting section 3, where the washers J are mounted on the bolts 2 and then stacked on the chute 4. At the bottom of the chute 4, as shown in FIG. 1, a fall prevention cylinder 5 is arranged to lock the bolt v that has reached the lowest stage of the chute 4, and the bolt V is secured to the tip of the bolt V when the piston rod 6 is extended. When the connected stopper 7 enters the chute 4 (the position shown in the figure), it is locked, and when the piston rod 6 is retracted and the stopper 7 exits the chute 4, it falls. Further, below the chute 4, a supply cylinder 9 is disposed so as to move a piston rod 10 forward and backward in a direction (vertical direction) along the center line Y shown by a chain line in FIG. At the tip of the bolt 10, a receiving surface 11a corresponding to the outer shape of the threaded part of the bolt ■ is provided so that the bolt ■ can be received and held from the chute 4.
A bolt receiving portion 11 is provided. In addition,
The bolt receiver 11 is set to a size and shape that can receive and stably hold the bolt V falling from the chute 4, taking into consideration the position of the center of gravity of the bolt Alternatively, a magnetic member may be used to attract and hold the bolt (2).

1 and 3, perpendicular to the center line Y mentioned above.
As shown by the chain line in the figure, a rotating means for temporarily assembling the bolt V, which faces the threaded portion M of the workpiece W and has a center vAx that coincides with the axis of the threaded portion M of the workpiece W to which the bolt ■ is attached. is located. This rotating means for temporary assembly is
It is installed on a slide table 13 placed so that it can slide in the center line X direction on a fixed frame 12, and in order to reciprocate this slide table 13, it is held on a bed 14 fixed to the frame 12. A sliding cylinder 15 and a piston rod 6 extending from the sliding cylinder 15 and connected to the slide table 13 are arranged along the centerline X direction.

An air motor 17 is fixed on the slide table 13, and a bearing stand 2o fixed to the slide table 13 is attached to the protruding shaft 18 of the air motor 17 via a connecting member 19.
A rotating shaft 22 is connected to the bearing base 20, and a spring 21 is compressed between the shaft 20 and the bearing stand 20. The rotating shaft 22 is positioned so that its axis coincides with the center line A magnetic attraction member 23 made of a permanent magnet and having a flat front end surface is fitted and fixed in the center of the section so that the front end surface thereof is orthogonal to the axis of the rotating shaft 22. The rotating shaft 22 is rotated integrally with the output shaft 18 of the air motor 17 by the connecting member 19, and is also moved in the axial direction thereof, that is, in the direction of the center line X. Further, the spring 21 is supported at its end so as not to rotate together with the rotation shaft 22, and absorbs the impact applied to the rotation shaft 22 when the bolt V is screwed into the threaded portion M of the workpiece W. It plays a mitigating role.

Furthermore, as shown in FIG. A piston rod 32 protrudes from the cylinder 31 along the center line Z, and an engaging portion 33 having an abutting surface 33a that abuts the head of the bolt v is provided at the tip of the piston rod 32. Further, on the other side in the direction of the center line Z, a retaining portion 37 having a second position adjusting cylinder 35.piston rod 36 and a contact surface 37a is arranged to connect the first position adjusting cylinder 31.piston. They are arranged symmetrically with respect to the rod 32 and the engaging portion 33, respectively.

According to an example of the device for temporarily assembling the pole 11 according to the present invention configured as described above, when temporarily assembling the pole l-V onto the threaded portion M of the workpiece W placed at a predetermined position, the supply cylinder 9 is moved. Operate the port receiving part 1 of the piston rod 10.
1 is raised to approach the lower part of the chute 4, as shown by the chain line in FIGS. 1 and 2. Next, when the fall prevention cylinder 5 is activated to cause the piston rod 6 to retract, the lowest one of the bolts V stacked on the chute 4 is released from the stopper 7 and falls. The screw portion is received and held by the bolt receiving portion 11. In this state, the piston rod 10 is lowered and stopped at a position where the center axis of the pole +-V substantially coincides with the center line X, as shown by the chain line in FIGS.

Subsequently, the sliding cylinder 15 is operated to cause the piston rod 16 to protrude, thereby causing the sliding table 13
is gradually advanced, and the magnetic adsorption member 23 attaches the pole l- to its front end surface.
The head of the V is magnetically attracted and the bolt V held in the bolt receiving part 11 is temporarily stopped at a receiving position (the position shown in FIG. 3). Here, the pole +-V is attached to the front end surface of the magnetic adsorption member 23 at the bolt receiving part 1 of the piston rod 10.
It is supplied from 1 and held by adsorption. At this time, bolt V
The axis of is parallel to the center line X because the head end face of the pole V and the front end face of the magnetic adsorption member 23 are perpendicular to the center line X, but the axis is parallel to the center line X. There is a possibility that a positional shift has occurred with respect to the threaded portion M of the workpiece W in the direction and the vertical direction, that is, in the direction of the center line Z and the direction of the center line Y. Therefore, in order to move the axis of the bolt ■ to an appropriate position, the first position adjustment cylinder 3
The first and second position adjusting cylinders 35 are operated alternately to advance the engaging portions 33 and 37 by a predetermined distance so that the axis of the bolt (2) coincides with the center line (X). That is, the port t held on the front end surface of the magnetic attraction member 23
- If the position of the axis of V is shifted from the center line X toward the workpiece W in the right direction (first position adjustment cylinder 31 side) and in the vertical direction, the first position adjustment cylinder 31 is activated. When the piston rod 32 is caused to protrude by a predetermined distance and the retaining portion 33 is advanced to the position shown in FIG.
The head of the magnetically attracting member 23 is moved so that its axis coincides with the center line X. Further, if the position of the axis of the bolt V is shifted toward the work W with respect to the center line
When the position adjusting cylinder 35 is operated to protrude the screw I/N rod 36 by a predetermined distance and the retaining part 37 is advanced to the position shown by the chain line in FIG. The head is pushed so that the axis of the pole V coincides with the center line X.

Next, the bolt (2) whose position has been adjusted on the front end surface of the magnetic attraction member 23 is screwed into the threaded portion M of the workpiece W. Therefore, the sliding cylinder 15 is actuated to move the slide table 13 further toward the workpiece W from the position shown in FIG. (In this example, the V is formed on the right-hand thread, so rotate it clockwise). As a result, Pol l-■ is attached to the magnetic adsorption member 23.
The front end face of the workpiece W is suctioned and held in a proper posture with its axis aligned with the center line of the threaded part M of the workpiece W, and is screwed into the threaded part M of the workpiece W while rotating.
It is temporarily assembled by being screwed into the threaded portion M by about 3 pitches.

When the temporary assembly is completed in this way, the sliding cylinder 15 is operated, the piston rod 16 is retracted, the slide table 13 is retracted, the air motor 17 is stopped, and other tightening operations are performed using tools. then tighten the bolt V into the work W and assemble it. At this time, since the bolt (2) has been temporarily assembled, the bolt (2) can be properly and quickly assembled without adjusting the position of the pole +-V.

In the above example, when supplying the bolt to the front end surface of the magnetic adsorption member 23 of the rotating means for temporary assembly, the center &IX which coincides with the center line of the threaded portion M of the work W and the axis of the rotating shaft 22 is Although the bolt receiver 11 is moved in a direction perpendicular to the bolt V, a manipulator or the like may be used to supply the bolt V to the front end surface of the magnetic attraction member 23.

(Effect of the invention) As is clear from the explanation below, the bolt m according to the present invention
According to the temporary assembly device, a magnetic attraction part having a plane perpendicular to the axis of the rotation shaft is provided at the tip of the rotation shaft for screwing bolts into the threaded part of the workpiece. After adsorbing and holding the pol l- type on the flat surface of the magnetic adsorption part, push it to adjust the position of the por ti on the flat surface of the magnetic attraction part,
The center line of the threaded part of the workpiece, the axis of the rotating shaft, and the axis of the bolt before screwing in are made to match, so the bolts are automatically aligned with the threaded part of the workpiece without relying on human means. It is possible to make adjustments to make the screwing posture and screwing position appropriate. Therefore, the initial screwing in when assembling bolts to a workpiece can be automatically performed in a state where the bolts assume an appropriate posture and position relative to the threaded part of the workpiece, and subsequent bolts can be screwed into the workpiece automatically. Tightening can be done easily and quickly, and automatic temporary assembly can be performed.

[Brief explanation of the drawing]

FIGS. 1, 2, and 3 are a side view, a front view, and a plan view, respectively, showing the structure and operation of an example of a temporary assembly device for bolts according to the present invention. In the figure, 4 is a shoe I, 5 is a drop prevention cylinder, 9 is a supply cylinder, 13 is a slide table, 15 is a sliding cylinder, 17 is an air motor, 22 is a rotating shaft, 23 is a magnetic attraction member, 31 and 35 are first and second position adjustment cylinders, ■ is a bolt, J is a washer, W is a workpiece, and M is a threaded portion of the workpiece W. Patent Applicant: Toyo Kogyo Co., Ltd. Figure 2

Claims (1)

[Claims] A rotating means for temporary assembly, comprising a rotating wheel that moves forward and backward, and a magnetic attraction part having a plane substantially perpendicular to the axis of the rotating shaft at the tip of the rotating shaft; and the magnetic attraction part. a supply means for supplying bolts onto a flat surface, and moving bolts attracted and held onto a flat surface of the magnetic attraction part on the flat surface;
and a position adjustment means for adjusting the position, the center line of the threaded part of the work into which the bolt is screwed, the axis of the rotary wheel, and the plane of the magnetic attraction part supplied from the supply means. aligning the axes of the bolts held by suction and whose positions have been adjusted by the position adjustment means, advancing the rotation shaft towards the workpiece and rotating it;
A temporary assembling device for bolts, which performs temporary assembling of the threaded part of the workpiece of the Pol 1 type.