JP2735275B2 - Rear cover locking device in rotary - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear cover locking device in a rotary, particularly when replacing a rotary claw, or performing rough tilling or ridge work. In this case, the present invention relates to a rear cover locking device in a rotary in which the rear cover is rotated upward to expand and the rear cover can be easily locked at the expanded position.

[Related Art] Conventionally, a rear cover locking device in this type of rotary will be described with reference to FIG. In the drawing, (1) is a rotary, and a rear cover (3) is hinged to a main cover (2). Brackets (4) and (4) are fixed to the rear end of the main cover (2), and the press rods (5) and (4) are slidably mounted on the rod guides (4a) and (4a) of the brackets (4) and (4). 5) is inserted. or,
The rod guides (4a) (4a) support the press rods (5) (5) so that they can be turned up and down.
Further, the lower ends of the press rods (5) and (5) are pivotally connected to the pins (6a) and (6a) of the brackets (6) and (6), respectively, and rod springs (5) and (5) are attached to the press rods (5) and (5). 7) (7) ... is wound. Thus, the pressing mechanisms (8) and (8) are formed by the brackets (4) and (4), the press rods (5) and (5), the brackets (6) and (6), and the rod springs (7) and (7). Make up. A pin insertion hole (9) is provided below the brackets (4) and (4) of the press rods (5) and (5).
(9) ... is opened.

Therefore, when replacing the tilling claw (10) of the rotary (1), or during rough tilling or ridge work, the rear cover (3) is turned upward, and this In order to lock the rear cover (3), first grasp the lower edge of the rear cover (3) with both hands, lift it up, and rotate the rear cover (3) upward. At this time, the pin insertion holes (9) of the press rods (5) and (5)
(9) project above the brackets (4) and (4). When a pin (not shown) is inserted through the pin insertion holes (9) (9)... Above the brackets (4) (4), the pins are inserted into the upper ends of the brackets (4) (4). And the rear cover (3) can be locked.

[Problem to be Solved by the Invention] The rear cover locking device in the conventional rotary described above is configured so that the pin is inserted into the pin insertion hole of the pre-seal rod to lock the rear cover. When turning, the rear cover can be grasped and lifted with both hands, but when inserting a pin, it is necessary to support the rear cover with one hand, and the pin is inserted, and Since the rear cover is supported, an unstable posture is forced. Therefore, the locking operation requires a great deal of time and labor, and especially the locking operation of the heavy rear cover involves danger to the human body, so that the locking operation cannot be performed by one person.

Therefore, there is a technical problem to be solved in order to simplify the locking operation of the rear cover so that the locking operation can be performed easily and safely by one person. The purpose is to solve.

Means for Solving the Problems The present invention has been proposed to achieve the above object, and in a rotary in which an upper end edge of a rear cover is hinged to a rear end edge of a main cover, A rock bar is fixed to an intermediate portion of the rear cover, and the rock bar is extended above the rear cover. A locking portion is formed at a tip of the rock bar, and a bracket or the like is used on an upper surface of the main cover. Pivot the hook so that it can rotate back and forth
The locking portion of the lock bar can be locked to the hook, a switching lever is pivotally mounted coaxially with the hook, and the switching lever and the hook are connected by a spring. The spring is urged in the tightening direction or the loosening direction with respect to the locking portion of the lock bar by the operation described in (1), thereby providing a rear cover locking device in a rotary. Things.

[Operation] In the present invention, the locking bar is fixed to the rear cover, and the locking portion is provided at the tip of the locking bar. Further, a hook is pivotally mounted on the upper surface of the main cover using a bracket or the like, and a switching lever or the like is provided so that the hook can be urged in a tightening direction or a loosening direction with respect to the locking portion via a spring. Is pivoted to

Therefore, in order to rotate the rear cover upward and lock it in the expanded state, first, the switching lever is operated to urge the hook in the tightening direction. When the lower end of the rear cover or the lower end of the rock bar is gripped with both hands and turned upward, the hook and the locking portion of the lock bar are engaged, and the rear cover is locked in the expanded state. be able to.

Therefore, it is possible to support the rear cover with both hands, and to lock the rear cover in a stable posture,
The danger to the human body of the lock operation can be eliminated. Further, since there is no need to perform the operation of inserting the pins into the insertion holes unlike the conventional type, even the single person can easily lock the rear cover. Further, since the hook is urged toward the locking portion of the lock bar by a spring, the hook does not accidentally come off from the locking portion of the lock bar, and the locked state of the rear cover can be reliably maintained. Can be.

On the other hand, to release the locked state of the rear cover, the switching lever is rotated so as to urge the hook in the loosening direction with respect to the locking portion of the locking bar by utilizing the dead center of the spring. At this time, the hook does not come off from the locking portion of the lock bar due to the weight of the rear cover. By rotating the rear cover slightly upward, the engagement between the hook and the engaging portion is released, and the hook is rotated by the bias of the spring in the loosening direction with respect to the engaging portion of the rock bar. Therefore, the locked state of the rear cover can be easily released.

[Embodiment] One embodiment of the present invention will be described below in detail with reference to FIGS. For convenience of explanation, technical matters belonging to the related art will be described at the same time.

In the figure, (10) is a main cover, and a rear cover (11) is hinged to the main cover (10). As shown in FIG. 1, a rock bar (12) is erected on the rear cover (11), and the rock bar (12) is bent and extended upward. In addition, this rock bar (12)
Is formed in an inverted shape in rear view, or the upper end is bent laterally to provide a locking portion (12a). Then, as shown in FIGS. 1 and 2, a bracket (13) is fixed to the upper surface of the main cover (10), and a hook (14) of the hook (14) is attached to a pivot pin (13a) of the bracket (13). The upper end part is pivotally attached to the front and rear pivotably. Further, a switching lever (15) is pivotally attached to the pivot pin (13a) so as to be pivotable back and forth.
A pin (15a) protrudes laterally above the bracket (13) at an intermediate portion of (5). In addition, the hook (1
At the lower end of 4), a pin (14a) is also protruded laterally, and the pin (14a) of the hook (14) and the pin (1) of the switching lever (15) are connected.
Both ends of the coil spring (16) are fixed to 5a).

Therefore, in order to rotate the rear cover (11) upward and lock the rear cover (11) in the expanded state, first, rotate the upper end of the switching lever (15) backward (in the direction of arrow V). I do. At this time, the coil spring (16), which urges the hook (14) forward, crosses over the dead center and urges the hook (14) rearward. It is turned in the direction. Thus, the rear cover (11)
The lower cover or the lower end of the rock bar (12) is gripped and the rear cover (11) is lifted upward and turned.
When the rear cover (11) is rotated until the locking portion (12a) of the lock bar (12) comes into contact with the hook (14), the locking portion (12a) is moved to the distal end portion (11) of the hook (14). 14b)
Is pressed to rotate the hook (14) slightly rearward, and the locking portion (12a) is locked by the locking portion (14) of the hook (14).
Upon reaching the position (c), as shown in FIG. 3, the hook (14) is restored to its original position by the urging of the coil spring (16), and the hook (14) and the rock bar (12) are restored.
Since the locking portion (12a) of the rear cover is engaged, the rear cover (1
1) can be locked in the expanded state. Even if the rear cover (11) is tilled in this expanded state, the hook (14) is tightened (in the direction of the arrow X) with respect to the locking portion (12a) of the rock bar (12). As a result, the hook (14) and the locking portion (12a) can be securely maintained in the locked state without any accidental departure.

On the other hand, to release the lock of the rear cover (11), the upper end of the switching lever (15) is turned forward (in the direction of arrow Y). At this time, the coil spring (16) urges the hook (14) forward (in the direction of arrow Z) beyond the dead center, but the hook (14) is locked by the rock bar (12).
The rear cover (1
The locked state of the rear cover (11) is maintained by the weight of 1). When the rear cover (11) is rotated slightly upward, the locking portion (12a) of the lock bar (12) rises above the engaging portion (14c) of the hook (14), and the hook (14) is raised. Is the coil spring (16)
The rear cover (11) can be released from the locked state since the rear cover (11) is rotated forward (in the direction of arrow Z) by the urging force.

As another embodiment, as shown in FIGS. 4 and 5, an inverted fixing bar (17) is erected on the upper surface of the main cover (10), and a bracket (18) is mounted on the rear cover (11).
Fasten (18). Then, the lower end of the plate (19) having the hook (19a) formed at the tip is pivotally attached to the pivot pin (18a) of the bracket (18) (18). Further, the pivot pin (18a) is protruded sideways (T). Then, a collar (20) is attached to the projecting portion (T) of the pivot pin (18a).
And a Z-shaped pin (21) is fixed to the outer peripheral surface of the collar (20) so that the Z-shaped pin (21) can rotate up and down. Stoppers (22) and (22) for preventing the Z-shaped pin (21) from rotating in the direction of the main cover (10) are fixed to the bracket (8). Further, a pin (19b) is protruded laterally from the plate (19), and both ends of the coin spring (23) are connected to the pin (19b) of the plate (19) and the Z-shape on the bracket (18) side. Secure with pin (21).

Therefore, to lock the rear cover (11) in the expanded state, the Z-shaped pin (21) is rotated downward (in the direction of arrow B). At this time, the plate (19) is urged downward (in the direction of arrow Y) by the urging of the coil spring (23). When the rear cover (11) is rotated upward, the hook (19a) of the plate (19) engages with the fixed bar (17) fixed to the main cover, and the rear cover (11) is expanded. You can lock in the state. or,
To release the locked state, the Z-shaped pin (21) is turned upward (in the direction of arrow A). At this time, the coil spring (23) goes over the dead center and the plate (19)
Of the rear cover (1).
The locked state is not released by the weight of 1). Furthermore,
By rotating the rear cover (11) slightly upward, the engagement between the hook (19a) of the plate (19) and the fixing bar (17) is released, and the coil spring (23) is released. The plate (19) is rotated upward (in the direction of arrow X) by the urging, so that the lock of the rear cover (11) can be released.

Further, as another embodiment, as shown in FIGS. 6 to 9, grooves (2) are formed in the press rod (25) of the pressing mechanism (24).
6) Form (26) ... A link mechanism (28) is provided in the bracket (27).
A roller (29) is fixed to the rear end of the roller. That is, an L-shaped arm (30) is provided on the inner wall surface on one side of the bracket (27).
And another arm (31) by a pin (32), and the L-shaped arm (30) and the arm (31) face the inner wall surface on the other side of the bracket (27). 33) and arm (34)
And are pivoted at the pin (36). A switch lever (30a) is provided with one side of the L-shaped arm (30) standing upright, and the front end of the other side and the front end of the arm (33) are connected to the connecting pin (36). Connected. The rear end of the arm (31) and the rear end of the arm (34) are connected by a C-shaped ring (37). Further, rollers (29) are rotatably connected to both ends of the C-shaped ring (37), and the rollers (29) are provided on the press rod (25) on the upper surface of the rod guide (38). The grooves (26) (26) are formed so as to be engaged with each other, and the respective arms (30) (31) (3
3) (34) is formed so as to be able to turn up and down around the pins (32) and (35) as a turning fulcrum. A coil spring (39) is fixed to the front piece (37a) of the C-shaped ring (37) and the connecting pin (36). Further, in order to maintain the rotation of the arms (30) (31) (33) (34) at a fixed interval, the stoppers (40) (40).
It protrudes from the inner surface of 7).

Therefore, to rotate the rear cover (11) upward and lock it in the expanded state, the switching lever (30a) is rotated forward (in the direction of arrow Y). At this time, the roller (29) is urged downward by the urging of the coil spring (39) and contacts the upper surface of the rod guide (38).
When the rear cover (11) is rotated upward, the groove (26) provided in the press rod (25) engages with the roller (29), and the rear cover (11) is locked in an expanded state. can do. In this locked state, the roller (29) is pressed downward by the weight of the rear cover (11). There is no sliding down. Further, when the rear cover (11) is further expanded and locked, the roller (29) is inserted into an arbitrary groove (26) simply by turning the rear cover (11) upward.
And the rear cover (11) can be locked. That is, when the rear cover (11) is raised, the groove (26) rises, and the arms (31) and (34) of the roller (29) engaged with the groove (26) also rotate slightly upward. But
The roller (29) itself rotates by the urging of the coil spring (39), returns to the original position on the upper surface of the rod guide (38), and engages with the groove (26).

On the other hand, to release the lock of the rear cover (11), first, the switching lever (30a) is rotated rearward (in the direction of the arrow X). At this time, the coil spring (39) crosses over the dead center and urges the roller (29) upward, but the roller (29) engaged with the groove (26) of the press rod (25). Does not come off from the groove (26) due to the weight of the rear cover (11). When the rear cover (11) is rotated slightly upward, the roller (29) is
6) The coil spring (39)
As a result, the arms (31) and (34) rotate upward, so that the lock of the rear cover (11) can be released. Thus, in this embodiment, the rear cover (1
There is an advantage that you can lock 1).

The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[Effects of the Invention] According to the present invention, the switching lever is operated by using the dead point of the spring, and the hook is urged in the tightening direction with respect to the locking portion provided at the tip of the rock bar. Then, when the lower end of the rear cover or the lower end of the rock bar is gripped with both hands and the rear cover is rotated upward, the hook engages with the locking portion provided at the tip of the rock bar. The rear cover can be locked in the opened state.

Therefore, the rear cover can be supported with both hands in a stable posture, and the rear cover can be easily locked without operation such as inserting a pin into an insertion hole unlike a conventional type. Can be.

To release the locked state, the switching lever is switched to cause the coil spring to move beyond the dead center, thereby urging the hook against the locking portion of the locking bar in the loosening direction. Then, the hook is released from the engaging portion only by slightly turning the rear cover upward, so that the lock releasing operation can be easily performed.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a partially cutaway side view, FIG. 2 is a rear view of the same part cutaway, FIG. 3 is a partially cutaway side view showing a locked state of a rear cover, FIG. 5 and 5 show another embodiment, FIG. 4 is a partially cutaway bevel view, FIG. 5 is a cutaway vertical side view of the same part, and FIGS. 6 to 9 show other embodiments. 6 is a partially cutaway perspective view, FIG. 7 is a perspective view of the main part, FIG. 8 is a side view of the main part, FIG. 9 is a side view of the main part showing the locked state of the rear cover, and FIG. It is a partially cutaway slope view of a conventional type. (10)… Main cover, (11)… Rear cover (12)… Rock bar, (12a)… Locking part (13)… Bracket, (14)… Hook (15)… Switching lever ( 16) Coil spring

Continuing from the front page (72) Inventor Isao Takechi 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Opened Sho 59-88002 (JP, A) Opened Sho 62-53611 (JP, U) Opened Sho 62-107607 (JP, U) Opened Sho 62-175804 (JP, U) Opened Sho 60-10326 (JP, U) JP, Y2)

Claims (1)

(57) [Claims] A rotary bar having a rear cover hinged to an upper edge of a rear cover at a rear edge of a main cover, wherein a rock bar is fixed to an intermediate portion of the rear cover, and the rock bar is extended above the rear cover. At the same time, a locking portion is formed at the tip of the lock bar, and a hook is pivotally attached to the upper surface of the main cover so as to be pivotable back and forth using a bracket or the like.
The locking portion of the rock bar can be locked to the hook, a switching lever is pivotally mounted coaxially with the hook, and the switching lever and the hook are connected by a spring.
A rear cover locking device for a rotary, wherein the spring urges the hook in a tightening direction or a relaxing direction with respect to a locking portion of the lock bar by operating the switching lever.