JP2003039259A - Two axis fastening apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to efficiently fasten respective nuts and the like using a two axis fastening apparatus even in the case where an obstacle exists on an extension line in the axial direction of a stud bolt. SOLUTION: A fixed side fastener 10 is attached to one end side of a support plate 7, which can rock about a pivot axis 5 with respect to a hanging rod 4, via a fixed plate 20, and a movable side fastener 11 is attached to the other end side of the support plate 7 via a slide plate 17 so that the movable side fastener 11 can approach to and separate from the fixed side fastener 10. Sockets 23 are provided on tips of fastening shafts 14, 15 of the respective fasteners 10, 11. Driving force from respective nut runners 12 is transmitted to the sockets 23.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-shaft tightening device capable of efficiently performing an operation of tightening a nut on a stud bolt of an engine cylinder, for example. [0002] Conventionally, for example, V used for riding lawn mowers
A plurality of stud bolts are built into the cylinder body of a model twin engine, and in the process of tightening nuts to these stud bolts, the gap between the cylinder body and the cooling fins is narrow, so a single shaft fastener is used. They are tightened one by one. [0003] However, if each of them is tightened one by one with a single-shaft fastener as in the prior art, the right and left fastening forces may be different, resulting in one-sided tightening, and work efficiency may be reduced. Was not good. On the other hand, from the viewpoint of improving work efficiency, even if it is attempted to simultaneously tighten the nuts of two stud bolts using a conventional general two-shaft tightening device, there are cooling fins in the direction in which the stud bolt axis extends.
The sockets of both fasteners could not be set at the position of the stud bolt at the same time, and the two shafts could not be simultaneously tightened. Accordingly, an object of the present invention is to make it possible to simultaneously and efficiently tighten each nut and the like with a biaxial fastener even when there is an obstacle in the axial direction of the stud bolt. [0005] In order to achieve the above object, the present invention relates to a biaxial tightening device provided with a biaxial tightening tool. The fastener on the other side can be moved toward and away from the fastener, and the fasteners can be tilted about the middle point between them. [0006] As described above, if the fastener on the other side is allowed to approach and separate from the fastener on the one side, even if there is an obstacle on the extension of the stud bolt, it is orthogonal to the axial direction. A socket or the like can be made to enter from the direction, and it is possible to simultaneously tighten with a biaxial fastener. In addition, if the two fasteners are made to be tiltable, for example, even when the number of the fastening parts is four or six in the circumferential direction, it is possible to fasten the fasteners two by two while appropriately tilting. In addition, work efficiency can be improved. Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a side view of a state in which a nut is tightened to a stud bolt of a V-type twin engine using a biaxial tightening device according to the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a biaxial tightening device. 4 is a plan view of the same, FIG. 5 is a left side view of FIG. 4, FIG. 6 is a right side view of FIG. 4, FIG. 7 is a horizontal sectional view of the tightening shaft, and FIG. FIG. 9
FIG. 4 is an explanatory view showing an example of a fastening method. The two-shaft tightening device according to the present invention is configured as a device suitable for, for example, tightening a nut on a stud bolt of a V-type twin engine cylinder used for a riding lawn mower, and simultaneously connects two nuts simultaneously. By tightening, work can be performed efficiently. That is, as shown in FIGS. 1 and 2, the biaxial tightening device 1 includes an upper beam 3 supported by a suspending tool 2, a hanging shaft 4 hanging down from the center of the upper beam 3. A pivot shaft 5 is attached to the lower end of the suspension shaft 4.
And a supporting plate 7 fixed to the mounting plate 6 so as to be adjustable in height. A left and right portion is provided between both ends of the supporting plate 7 and both ends of the upper beam 3. A pair of springs 8 are stretched, a fixed-side fastener 10 is fixed near one end of the support plate 7, and a movable-side fastener 11 is provided near the other end. . Each of the fasteners 10 and 11 is adapted to transmit a rotational driving force from the upper nut runner 12 to the lower fixed and movable tightening shafts 14 and 15 via the angle type socket 13. . That is, as shown in FIGS. 4 and 5, the movable-side fastener 11 is attached to a slide plate 17 which is slidable along a guide rail 16 provided on the back side of the support plate 7, and is horizontal. An operation handle 18 for an operator to operate is attached to a lower surface of one end of the slide plate 17. On the other hand, the fixed-side fastener 10 is attached to a fixed plate 20 fixed to the back side of the support plate 7 as shown in FIGS. For this reason, by sliding the slide plate 17 to the left and right, the movable-side fastener 11 becomes fixed-side fastener 10.
Can be approached and separated from the camera. Each of the fastening shafts 14 and 15 is tapered as shown in FIGS. 7 and 8 so that the socket portion at the tip can be inserted even in a narrow place. That is, the driving force transmitted from the angle type socket 13 to the output shaft 21 is transmitted to the leading socket 23 through the gear train 22. As shown in FIG. It can be inserted even in a narrow place such as a gap between the stud bolt Es of the engine cylinder E and the cooling fin Ef. In the two-axis tightening device 1 as described above, the distance between the fixed-side fastener 10 and the movable-side fastener 11 is adjustable, and the mounting plate 6 is swung about the pivot shaft 5. As a result, the tightening shafts 14, 1,
5 can be changed, and when the swinging power is released, the original posture is restored by the reaction force of the spring 8. Next, the operation and the like of the biaxial tightening device 1 will be described. As shown in FIGS. 1 and 2, the engine cylinder E flows into the tightening process. The engine cylinder E has four stud bolts, and in the case of a V-type twin engine, eight stud bolts are implanted. When the engine cylinder E is clamped by a clamp jig (not shown), An operator attaches a nut N to this stud bolt Es.
Is temporarily tightened. Next, as shown in FIG. 9, the operator fits the socket portion 23 of the fixed-side tightening shaft 14 into the nut N at a predetermined position, and then slides the movable-side tightening tool 11 to move the movable-side tightening tool 11. The socket portion 23 of the tightening shaft 15 is inserted from the gap between the stud bolt Es and the cooling fin Ef in the diagonal direction, and is fitted to the nut N temporarily tightened on the stud bolt Es to simultaneously tighten the two shafts. When the tightening of the two nuts N is completed,
The operator swings the mounting plate 6 around the pivot shaft 5 in accordance with the position of the next stud bolt Es as shown by the chain line in FIG. The same operation is repeated by changing the positions of the attached shafts 14 and 15 to simultaneously tighten the two shafts. When tightening is completed and the operator removes the oscillating power, the tightening device returns to the original position by the action of the spring 8. According to the above procedure, even if there is an obstacle on the axial extension of the stud bolt Es,
The two shafts can be tightened at the same time, and problems such as partial tightening can be prevented. The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and exhibiting the same functions and effects belong to the technical scope of the present invention. For example, the type of the work and the like are arbitrary. As described above, the two-axis tightening device according to the present invention allows the other fastener to approach and separate from the one fastener, and the intermediate between the two fasteners. The two fasteners can be tilted freely using the point as a fulcrum, so even if there is an obstacle on the axis extension of the stud bolt, a nut runner, etc. can be entered from the side of the shaft, making it a two-axis fastener. At the same time, it is possible to improve work efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a state in which a nut is tightened to a stud bolt of a V-type twin engine using a biaxial tightening device according to the present invention. Front view of the two-axis tightening device [FIG. 4] Same plan view [FIG. 5] Left side view of FIG. 4 [FIG. 6] Right side view of FIG. 4 [FIG. 7] Horizontal sectional view of the tightening shaft [FIG. Front view of a tightening shaft [FIG. 9] Explanatory diagram showing an example of a tightening method [Description of reference numerals] 1 ... Two-axis tightening device, 4 ... Suspension shaft, 5 ... Pivot shaft, 7 ... Support plate, 10 ... Fixed side fastener, 11 ... Movable side fastener, 14
... fixed side tightening shaft, 15 ... movable side tightening shaft, 16 ... guide rail, 17 ... slide plate, 23 ... socket part, E ... engine cylinder, Es ... stud bolt, N ... nut.

Claims (1)

Claims: 1. A two-shaft tightening device having a two-shaft fastener, wherein the two-shaft fastener has one fastener with respect to the other fastener. A biaxial tightening device, wherein the fasteners can be moved toward and away from each other, and the two fasteners can be tilted about an intermediate point therebetween.