JPH0476812B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a restraining device for preventing the non-operating side of two shift arms provided close to each other from moving unintentionally.

In a shift operation unit in which two operating shafts with respective shift arms are arranged on the same axis or close to each other, adjustments must be made to ensure that the check operation of the check piece does not go awry. The work is difficult because the adjustment allowance is small.

In the conventional restraining device, the restraining piece is generally provided at a position away from the change guide that guides the respective operating positions of the change lever, that is, in the vicinity of the swinging fulcrum of the change lever.
There is a large difference between the operating position of each of the change levers and the position of the restraining piece, which makes the above-mentioned adjustment work even more difficult.

In view of the above-mentioned defects, the present invention was proposed in order to improve the above-mentioned problems, and is to provide two operation shafts each having a shift arm on the same axis or close to each other. In the shift operation section, engagement parts 4a and 5a of the change lever 10 are provided at the upper portions of the shift arms 4 and 5, respectively, and the engagement parts 4a and 5a of the shift arms 4 and 5 are provided respectively.
A chain guide 6 is provided close to and above a, and the chain guide 6 has an H-shaped guide groove 11.
is opened, and furthermore, a flat check piece 12 is provided which is slidably supported in the right and left directions along the upper or lower surface of the change guide 6, and the check piece 1
A groove 12 having a shape substantially equal to one groove of the H-shaped guide groove 11 of the chain guide 6 is provided on one side of the chain guide 6.
a, and both ends of the restraining piece 12 are bent downward, and the shift arms 4, 5 are attached to the bent portions.
An engagement groove 1 that can be engaged with each of the engagement portions 4a and 5a of
2b and 12c, and furthermore, the change lever 10 is inserted into the groove 12a of the restraining piece 12 and the H-shaped guide groove 11 of the change guide 6, and the change lever 10 is inserted into the groove 11a on the left side of the guide groove 11.
When the left shift arm 5 is engaged with the engagement portion 5a of the left shift arm 5, the left engagement groove 1 of the check piece 12 is moved to the left shift arm 5.
2b is the engagement groove 12 on the right side after being disengaged from the engagement portion 5a.
c engages with the engaging portion 4a of the shift arm 4, and further moves the change lever 10 to the right groove 11b of the guide groove 11 and engages with the engaging portion 4a of the right shift arm 4. The right engagement groove 12c of the restraining piece 12 is disengaged from the engagement part 4a, the left engagement groove 12b engages with the engagement part 5a of the shift arm 5, and the change lever 10 is the guide groove 11
A neutral groove 11c in the center of the left and right grooves 11a and 11b.
, the engaging groove 12a of the restraining piece 12 can be engaged with the engaging part 5a, and the engaging groove 12c can be engaged with the engaging part 4a, respectively. It provides equipment.

An embodiment of the invention will be described based on the drawings. Fig. 1 shows a perspective view, second shows a view from arrow A (front view), and Fig. 3 shows a view from arrow B (side view). As shown above, the operating shaft 2 and the operating shaft 3 are attached to the bearing body 1.
As shown in the figure, each shaft is supported so that it can rotate independently around the same axis (or, although not shown, both operating shafts are parallel to each other and close to each other and supported in parallel). The bifurcated engaging portions 4a and 5a of the shift arms 4 and 5 fixed to the shafts 2 and 3 are positioned close to each other, and a change guide 6 is positioned above the engaging bodies 4a and 5a and brought close to the engaging portions 4a and 5a. A rectangular block 8 is rotatably fitted to a fixed shaft 7 fixed to a machine frame (not shown) and fixed to a bearing body 1 concentrically with the axes of the operating shafts 2 and 3. If the bifurcated portion 10a of the change lever 10 is pivoted to a fixed pin 9 fixed to this block 8 at right angles to the block 7, and the change lever 10 is swung from side to side in FIG. , the change lever 10 is engaged with and disengaged from the engaging parts 4a and 5a of the shift arms 4 and 5, and the change lever 10 is swung in the front and back directions in FIG. 3 by being engaged with the engaging parts 4a and 5a. When operated, the operating arm 2a or 3a of the operating shaft 2 or 3 operates a speed change mechanism (not shown).

As shown in FIGS. 5 to 7, a flat plate-shaped check piece 12 is provided on one side of the check piece 12, and has a shape approximately equal to one of the H-shaped guide grooves 11 of the change guide 6. A groove 12a is provided, and both ends of the restraining piece 12 are bent downward, and the bent portion is provided with a substantially reverse side so that it can be fitted onto the engaging portions 4a and 5a of the shift arms 4 and 5, respectively. Engagement grooves 12b and 12c formed by a letter-shaped notch are provided. Furthermore, the change lever 10 is fitted into the groove 12a of the check piece 12, and the check piece 12 is provided so as to be sandwiched from above and below by the change guide 6 and the guide plate 18 below it, as shown in FIG. Change lever 10 like
When it is moved to the left groove 11a of the guide groove 11 and fitted onto the engagement part 5a of the left shift arm 5, the left engagement 12b of the restraining piece 12 is moved to the engagement part 5a of the left shift arm 5.
However, since the right engagement groove 12c is externally fitted into the engagement portion 4a of the shift arm 4, the shift arm 4 is prevented from moving inadvertently by the restraining piece 12, and the change lever 10 When it is moved to the right groove 11b of the guide groove 11 and fitted onto the engagement part 4a of the right shift arm 4 as shown in FIG. 4, the right engagement groove 12c of the restraining piece 12 is Engagement part 4
However, the left engaging groove 12b is fitted onto the engaging portion 5a of the shift arm 5, and the shift arm 5 is configured to be prevented from moving inadvertently by the restraining piece 12. Although not shown, when the change lever 10 is placed in the neutral groove 11c at the center of the left and right grooves 11a and 11b of the guide groove 11, the engagement groove 12b of the restraining piece 12 is connected to the engagement part 5.
a, and the engaging groove 12c is fitted onto the engaging portion 4a, respectively, so as to block both shift arms 4 and 5 together.

Although not shown, the restraint piece 12 may be positioned above the change guide 6 and the guide plate 18 may be provided above the restraint plate 12.

The change lever restraining device according to the present invention is constructed as described above, and since the restraining piece 12 and the shift arms 4 and 5 are provided close to each other on the change guide 6, the change lever 10 is 16 into the guide groove 11, the engagement and disengagement state of the shift arms 4 and 5 at this time, and the engagement and disengagement state of the check piece 12 and the shift arms 4 and 5. This invention can solve the difficulty of adjustment operations caused by the large distance between the change guide and the check piece as in the conventional check device described above.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention; FIG. 1 is a perspective view, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIGS. 3 and 4 are views taken in the direction of arrow B in FIG. 5 is a plan view of the main part of FIG. 1, FIG. 6 is a slope view of the restraining piece, and FIG. 7 is a vertical sectional view of the main part of FIG. 1. Explanation of symbols, 2, 3... Operating unit, 4, 5... Shift arm, 6... Change guide, 10... Change lever, 12... Check piece.

Claims (1)

[Claims] 1 In a speed change operation section in which two operation shafts, each equipped with a shift arm, are provided on the same axis or close to each other, the engagement portions 4a, 5a of the change lever 10 are located above the shift arms 4, 5. Further, a change guide 6 is provided close to and above the engaging portions 4a, 5a of the shift arms 4, 5, and an H-shaped guide groove 11 is formed in the change guide 6. Furthermore, a flat check piece 12 is provided along the upper or lower surface of the change guide 6 so as to be slidable in the right and left directions, and a check piece 12 in the form of a flat plate is provided on one side of the check piece 12. A groove 12a of approximately the same shape is provided in one groove of the H-shaped guide groove 11, and both ends of the restraining piece 12 are bent downward, and each of the shift arms 4 and 5 is attached to the bent portion. Further, the change lever 10 is inserted into the groove 12a of the restraining piece 12 and the H-shaped guide groove 11 of the change guide 6,
When the change lever 10 is moved to the left groove 11a of the guide groove 11 and engaged with the engagement portion 5a of the left shift arm 5, the left engagement groove 12b of the check piece 12 After disengaging from the engaging part 5a, the right engaging groove 12c engages with the engaging part 4a of the shift arm 4, and then the change lever 10 is moved to the right groove 11b of the guide groove 11, and the right engaging groove 12c is disengaged from the engaging part 5a. shift arm 4
When the restraining piece 12 is engaged with the engagement portion 4a, the right engagement groove 12c of the restraining piece 12 is disengaged from the engagement portion 4a, and the left engagement groove 12b is engaged with the engagement portion 5a of the shift arm 5.
and when the change lever 10 is in the neutral groove 11c at the center of the left and right grooves 11a, 11b of the guide groove 11, the engagement groove 12 of the restraining piece 12
a to the engaging part 5a, and the engaging groove 12c to the engaging part 4.
A check lever device for a change lever, characterized in that it is configured to be able to engage with a.