JP2000317745A - Pallet type general-purpose clamping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pallet type general-purpose clamping device which is low-cost and has a number of general-purpose properties. SOLUTION: This device is equipped with plural nut runners 4a, 4b, and 4c composed of a clutch 5, a decelerator part 6, a torque detecting part 7, and a socket 8, and a rotation transmission part 9 for commonly rotating plural nut runners 4a, 4b, and 4c, on the upper and lower surfaces of a pallet 1 respectively. The plural runners 4a, 4b, and 4c are selectively and rotatably driven through on-off control for a clutch 5 by a rotation drive device 11 having only a rotation function to be detachably secured to the transmission part 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pallet-type general-purpose fastening device.

[0002]

2. Description of the Related Art For example, in an automobile assembly line,
There are steps of tightening the engine on the chassis frame, tightening the underbody such as the axle, and tightening the body on the subframe.

A pallet-type tightening device using a nut runner is used for the above-mentioned tightening operation. However, a conventional pallet-type tightening device is loaded onto a roller 2 provided on a carriage 1 as shown in FIG. A plurality of sockets of the A car socket 80a, the B car socket 80b, and the A / B car common socket 80c are arranged on the pallet 3 to be set.
A rotary drive device 110 is provided on the carriage 1 below the trolley 1. The rotary drive device 110 is configured such that a movable table 13 is guided on a fixed table 12 by a guide shaft 14 so as to be able to move up and down, and is moved up and down with a required stroke by a cylinder 15. Rotation drive unit 50, reduction gear unit 60, torque detection unit 70, rotation shaft 17
The two nut runners 40a and 40b composed of
One of the nut runners 40a is an A car socket 80a.
And the movable base 1 corresponding to the positions of the A-car socket 80a and the B-car socket 80b so as to couple the rotating shaft 17 to the coupling socket 10 of the B-car socket 80b.
3 and is guided by the guide rail 90 on the shift cylinder 9.
1 and the other nut runner 40b is fixed to correspond to the A and B common socket 80c.

As shown in FIG. 4, the A vehicle socket 80a, the B vehicle socket 80b, and the A / B vehicle common socket 80c are rotatably supported by a holder 81 fixed on the pallet 3 so as to be rotatable. The upper end of the shaft 82 is provided with an A vehicle socket 80a (B socket 80b, AB
The vehicle common socket 80c) is attached, and the coupling socket 10 is formed at the lower end of the shaft 82.

[0005]

The above-mentioned conventional pallet-type tightening device is designed so that each time a pallet with a socket is replaced for each vehicle type, the pallet is tightened according to the position of the socket and the tightening torque.
Since the positions of multiple nutrunners are variably arranged or the number of nutrunners is fixed and tightening is performed, the equipment becomes a dedicated machine and multi-model mixed production requires large equipment costs for each new model introduction There was a problem that required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pallet-type general-purpose fastening device that is low in cost and highly versatile.

[0007]

In order to achieve the above object, the gist of the present invention is to dispose a plurality of nut runners comprising a clutch, a speed reducer, a torque detector and a socket on the upper surface of a pallet. A lower surface is provided with a rotation transmission unit for transmitting rotation to the plurality of nut runners, and a rotation drive device having only a rotation function of detachably coupled to the rotation transmission unit and applying a rotation force is moved up and down below the pallet. It is characterized by being arranged as possible.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, for an A-vehicle, a clutch 5, a reduction gear unit 6, a torque detection unit 7, and a socket 8 are provided on the upper surface of a pallet 3 which is carried in via rollers 2 provided on a carriage 1. A plurality of nut runners of a nut runner 4a, a nut runner 4b for a B car, and a nut runner 4c for an A / B car are arranged, and a rotation transmission unit 9 for transmitting rotation to the plurality of nut runners on the lower surface of the pallet 3.
The trolley 1 below the pallet 3 is provided with a rotation drive device 11 having only a rotation function.

The rotary drive device 11 is configured such that a movable table 13 is guided by a guide shaft 14 on a fixed table 12 so as to be able to move up and down, and is moved up and down by a cylinder 15 at a required stroke. A single rotation drive device 11 composed of a rotation drive unit 16 and a rotation shaft 17 that removably couples to a coupling socket 10 provided on the rotation transmission unit 9 and that applies a rotational force is arranged thereon. It is the structure which did.

As shown in FIG. 2, the rotation transmission portion 9 includes a nut runner 4a for an A vehicle and a nut runner 4b for a B vehicle.
And pulley 9 for nut runner 4c for A and B vehicles
A rotation transmission mechanism using a timing belt mechanism or a gear mechanism spanning a is used.

The operation of the pallet-type general-purpose fastening device will be described. The bogie 1 runs synchronously with a vehicle body conveyed by a conveyor in an automobile assembly line. The pallet 3 is loaded onto the carriage 1 and fixed in position. The nut runner 4a for vehicle A, the nut runner 4b for vehicle B, or the nut runner 4b for vehicle B is conveyed by a conveyor and performs a tightening operation.
-The nut runner 4c for vehicle B is made to correspond to the tightening portion of the vehicle body. In the case where the rotary drive device 11 is not installed on the movable carriage 1 and the work is stopped at a fixed position as in tact transfer and tightening is performed, the rotary drive device 11 is moved to the fixed position where the work stops. It is also possible to use a fixed type installed.

The operation of the rotary drive device 11 is as follows. The movable base 13 is lifted by the cylinder 15 to raise the rotary drive unit 16, and the rotary shaft 17 is connected to the connection socket 1 on the lower surface of the pallet 3.
Bind to 0. Thus, by instructing the rotation drive unit 16 to perform a rotation operation, a rotational force is applied to all of the nut runner 4a for the A vehicle, the nut runner 4b for the B vehicle, and the nut runner 4c for the A and B vehicles through the rotation transmission unit 9. State.

The nut runner 4a for the vehicle A, the nut runner 4b for the vehicle B, and the nut runner 4c for the vehicle A and B, which are in a state of applying a rotational force through the rotation transmission portion 9, are connected to the clutch 5 so that the required Nut runner 4a,
4b or 4c is operated, and their operation, tightening torque, and stop are controlled by a control computer and a nutrunner controller (not shown).

This operation is performed in a series of vehicle type determination → vehicle positioning → pallet ascending shift → rotary drive ascending → nut runner rotation → torque detection / OK → clutch disengagement → nut runner stop → rotary drive descending and returning → pallet downshift → pallet replacement. Perform the operation.

As described above, according to the present invention, a plurality of nut runners 4a, 4b, 4c mounted on various pallets are commonly driven by a rotary drive device having only one rotary function. In addition, there is no need to provide a plurality of rotary drive devices 110 including a rotary drive unit 50, a speed reducer unit 60, and a torque detection unit 70, and a variable device for associating them with the positions of the nut runners. The cycle time can be shortened.

Further, the clutch 5 is built in each of the nut runners 4a, 4b, 4c, and the required nut runners 4a, 4b, 4c or all can be operated by controlling the clutch 5, so that the tightening is sequentially completed. Also, it is possible to cope with simultaneous tightening of each shaft, improving work efficiency.

In the above-described embodiment of the present invention, an example in which the present invention is applied to the tightening of bolts and nuts in an automobile assembly line has been described. However, the present invention is not limited to this. It can be applied to tightening bolts and nuts in assembling.

[0018]

As described above, according to the present invention, a plurality of nut runners composed of a clutch, a speed reducer, a torque detector and a socket are provided on the upper surface of the pallet, and the plurality of nut runners are commonly provided on the lower surface of the pallet. A configuration in which a plurality of nut runners are selectively driven to rotate by a clutch on / off control by a rotation drive device having only a rotation function detachably coupled to the rotation transmission unit, comprising a rotation transmission unit that rotates. Therefore, it is possible to cope with mixed production of various models without using a dedicated machine, and it is possible to reduce equipment costs and cycle time, thereby improving working efficiency.

[Brief description of the drawings]

FIG. 1 is a side view of the apparatus of the present invention.

FIG. 2 is a side view of a nut runner.

FIG. 3 is a side view of a conventional device.

FIG. 4 is a sectional view of a socket of a conventional device.

[Explanation of symbols]

 Reference Signs List 1 cart 3 pallet 4a nut runner 4b nut runner 4c nut runner 5 clutch 6 reduction gear unit 7 torque detection unit 8 socket 9 rotation transmission unit 11 rotation drive unit 16 rotation drive unit

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Takao Nakazawa, Inventor No., Taura Port Town, Yokosuka City, Kanagawa Prefecture Inside Kanto Automobile Industry Co., Ltd. (72) Hisao Katsuta, 869-2 Kitajima-cho, Hamamatsu City, Shizuoka Prefecture Inside

Claims (1)

[Claims] A plurality of nut runners each including a clutch, a speed reducer, a torque detector, and a socket are arranged on an upper surface of the pallet, and a rotation transmission unit for transmitting rotation to the plurality of nut runners is provided on a lower surface of the pallet; A pallet-type general-purpose tightening device, characterized in that a rotary drive device having only a rotation function of detachably connecting to a rotation transmission portion and applying a rotational force is arranged below the pallet so as to be able to move up and down.