KR20160042222A - Back latch for heavy equipment - Google Patents

Abstract

The present invention relates to a back latch for heavy equipment which drives a latch with a release lever of a driver′s seat to release locking for a striker. Water and moisture do not infiltrate any portion except for a striker hole which is inevitably opened, corrosion of the interior and the inner face of the casing is prevented, and foreign materials which are factors responsible for abnormal functions of active elements are blocked from infiltrating. The back latch of heavy equipment comprises: a casing which excludes an active hole for a latch catch or a lever hole for operation activation operated outside to release locking for a striker by interworking with the latch; a fork which corresponds to the operation of a lever catch; which a catch shaft which has a key groove integrally connecting and supporting the fork and the lever catch; and a catch and a fork to which a key of the catch shaft is added, wherein the key is inserted into the shaft hole.

Description

{Back latch for heavy equipment}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heavy-duty back latch for releasing a lock on a striker by driving a latch with a release lever of a driver's seat, and more particularly, It is effective in preventing corrosion of latch and latch catches, latch shaft and latch shafts, latches and latch catches that pivotally support them, and is also effective in preventing malfunctions and deterioration of movable components caused by accumulation of foreign substances in the casing This relates to heavy-duty back latches.

The back latch can easily be unlocked from the driver's seat with the release lever by attaching to the hood or hatch of a specially equipped vehicle such as a trunk hatch or hood of a passenger car, a specially equipped vehicle such as a crane, a forklift, a dump truck, a fork crane, an excavator, When the closing film such as a hood or a hatch is closed, the striker attached to the body side is locked to lock the door without being artificially locked. The casing, the latch, the latch claw, the return spring for the latch and the return spring for the latch claw are key.

The casing supports and protects the built-in latches and latch catches, the return spring for the latches and the return spring for the latch catches, and the latch is the key part to lock the striker to lock and unlock the hatch or hood to open. Also, the latch catch is a component that locks the latch to retain the lock to the striker until the locking latch that restrains the striker intentionally releases the lock.

The latch is provided with a latching jaw which is locked by the locking jaw of the latching claw. The pulling end of the latching claw is provided so as to be exposed to the outside of the pulling-out end of the opening of the case. It is linked and connected.

In the strict sense, the double lock disclosed in the prior art Patent Publication No. 1979-1250, which is different from the technical field, but which can be replaced by a back latch, and Patent Document No. 2004- The locking device of a heavy duty vehicle disclosed in Japanese Patent Application Laid-Open No. 5744 and the locking and unlocking device of a work vehicle disclosed in Japanese Patent Laid-Open Publication No. 2013-98567 are good examples.

The prior art described in these patent documents is that the lever ball or the latch claw for pulling the opening of the casing in the ceiling of the casing is used for rainwater in rainfall, water for melting snow in snowfall, high pressure washing water for washing or washing, The foreign matter becomes a penetration.

Water that penetrates into the lever ball or the traction-only activity ball corrodes the casing interior and promotes corrosion, and the foreign matter interferes with the shaft of the rotating latch and latch claw in the shaft, thereby impairing function or causing an activity disorder.

Moisture generated by evaporation of water impregnated into the casing also causes corrosion of the inner surface of the casing and the latches, the latch claws, the return spring for the latches and latch claws, and the latch and latch claw shafts. Particularly, in winter, moisture and water penetrating into the casing are frozen and the parts are frozen, and the operation of opening the latch is insufficient until the ice melts.

In view of this, in order to prevent or eliminate the internal corrosion of the back latch, the functional deterioration of the active element, and the dysfunction, it is necessary to suppress or prevent the penetration of foreign matter such as dust or dirt into the casing.

Patent Publication No. 1979-0001250

Published Japanese Patent Application No. 2004-0005744

Published Patent Publication No. 2013-0098567

The present invention can prevent moisture and moisture from penetrating into any part of the striker except for the striker access hole which is inevitable to open, preventing corrosion of the inner surface and internal parts of the casing, And also to provide a heavy duty back latch capable of blocking the penetration.

The above object is also achieved by a control apparatus for a lever, comprising: a casing which excludes a lever hole for inter-operation of a lever to be operated externally to unlock the striker by engaging the latch and an operation hole for the latch catch; A heavy duty back latch comprising a latch shaft having a key groove for supporting and linking the lever latches in an identical manner and a latch catch and fork to which a key is attached to the key shaft of the latch shaft.

In the present invention, components such as levers and latches, which are essential for locking the striker, are provided inside the casing to form a non-exposed structure that is not exposed to the outside, so that moisture penetration holes are not formed on the upper and side surfaces of the casing. Therefore, rainwater or washing water can not penetrate into the casing, and the penetration of foreign matter is also impossible. Therefore, the corrosion of the inner surface of the casing and the various internal parts, which are concerned due to moisture and moisture, is eliminated, and the function of the elements in the casing due to the accumulation of the foreign substances and the function failure phenomenon can be eliminated.

In addition, the present invention relates to a lever which is connected to an external cable to transmit a forward /

And the latch claw is interlocked with the pawl shaft having the key groove by extending the lower portion of the casing so that the forward and backward driving force of the upper end of the lever is easily transferred to the latch pawl through the lower end portion of the lever and the pawl shaft at the lower side of the casing, The clogging structure on the upper surface of the casing can be easily used by adopting the transfer structure.

1 is a partial exploded view of a conventional single acting type back latch to which a lever hole or a pawl pulled casing is applied.
Figure 2 is an exploded view of the conventional back latch shown in Figure 1;
Figure 3 is a perspective view of a back latch according to the present invention.
Fig. 4 is a longitudinal front view of Fig. 3
Figure 5 shows an exploded view of the back latch
Figure 6 is a side view of the coupling of the fork and latch claw

The backlatch illustrated in Figures 1 and 2 is a deformed backlatch that is not described in the background art. This prior art feature is single acting, with only one latch and one latch.

Concretely, the ceiling 5 positioned at the opposite side of the striker accessing groove 15 in the casing 1 is provided with an active hole 7 for pulling tongue of the catch 3, The striker 14 is locked or unlocked in its place by being hooked on the transverse latch shaft 8 in the vicinity of the middle striker access groove 15 inserted in the casing 2 and the casing 2 between the latch 2 and the ceiling 5, The lock pawl 13 integrally formed with the lock jaw 13 that locks the latching jaw 12 of the latch 2 restrained by the striker is loosely attached to the latched pawl shaft 9 in parallel with the latch shaft 8, Pulling the release lever installed on the driver's seat while the driver is seated on the driver's seat causes the latch 2 to perform the angular movement corresponding to the movement force of the release lever transmitted through the cable 10, thereby helping the latch 2 to release the lock.

Reference numeral 11 denotes a flange for attaching a vehicle body, 16 denotes a return spring for a catch, and 17 denotes a return spring for a latch.

The single-acting back latches shown in these figures are also pierced with the latch holes for the latch claws on the ceiling of the casing, so that the drawbacks of the above-mentioned prior art are evident.

The technical structure of the present invention is shown in detail in FIG. 3, FIG. 4, FIG. 5, and FIG.

The latch casing of the present invention is divided into an upper body (A) and a lower body (B). The upper body A is formed as a single body with a ceiling (roof) closed and is formed integrally with the flat flange so that water or moisture can not flow into the upper body A.

The lower body B to be coupled to the lower portion of the upper body A is similar to the upper body but has a U-shaped striker access groove 15 so that the striker 14 can be inserted into the lower surface thereof. Since the striker entrance / exit groove 15 is formed on the bottom surface of the lower body, water can not flow into the lower body. Instead, the striker entrance / exit groove 15 serves as a natural outlet for falling down even if moisture or moisture penetrates. Therefore, the upper body (A) of the casing of the present invention is a characteristic element of the non-hollow upper body structure in which the ceiling (50) is not provided with a lever ball or a traction sheave ball.

A latch 30 is provided on the upper body A of the present invention and a latch 20 is provided on the lower body B. The upper body A and the lower body B, Are integrated by fixing means such as welding or reversing.

The lever 40 of the present invention for transmitting the driving force has a different structure from the conventional one. Since the ceiling of the upper body (A) is clogged with the present invention, the lever (40) and the catch (30) can not be directly connected.

Therefore, the present invention is characterized in that the lower end of the lever 40 is formed in a pair of forks so that the lever 40 and the claw 30 are connected and connected by a detour connection method as another characteristic element.

The pawl 30 mounted on the inside of the upper body is fixed to both side walls of the upper body by the pawl shaft 19. The present invention is characterized in that both ends of the lever 40 are connected to the pawl shaft 19, ).

A return spring 42 is provided between the pulling end 41 at the upper end of the lever 40 and the upper body so that the lever 40 advanced by the cable is pulled back and returned to the original position.

The rear end of the cable 10 derived from the driver's seat release lever (not shown) is connected to the pull end 41. The lever 40 is a transmission means for moving the pawl 30 and transmits the pawl movement of the lever 40 directly to the pawl 30 through the pawl shaft 19.

As shown in Fig. 4, the combination state of the lever 40, the pawl 30 and the pawl shaft 19 can be confirmed. The latch 20 is loosely fitted to the latch shaft 8 and the coil spring 17 coaxially inserted is engaged with the latch 20 as soon as the lock jaw 13 of the lock 30 is released from the latch jaw 12. [ Lock pawl 19 and the latch 30 provided to rest against the pawl shaft 19 is connected to the latch 20 which restrains the striker 14 with the aid of a coil spring threaded on the pawl shaft 19 So as to be locked.

Another peculiar feature of the present invention is that the keyway 29 uses a given pawl shaft 19 and the pawl 30 and the lever 40 are coupled together on the pawl shaft 19 with the keyway 29 Respectively.

Specific details are shown in Fig. 5 and Fig. That is, as shown in these drawings, the shaft hole 33 for the lock body of the upper body A is a circular hole, the lock shaft 19 has a key groove 29 formed at one point of the outer circumferential surface in the axial direction, The key 32 and 42 are integrally formed in the shaft hole 41 of the shaft hole 31 and the lever 40 of the lever 40 so as to be forcedly fitted into the key groove 29.

The pawl shaft 19 is inserted into the shaft hole 33 of the upper body A while the pawl 30 is inserted into the upper body A and the key 32 is fitted to the key hole 29, So that the pawl shaft 19 and the pawl 30 have a sense of unity not only mechanically but also powerfully.

The lever 40 is assembled in such a way that the key 42 is fitted into the key groove 29 in the same manner as in the case of the lock 30 so as to have a sense of unity.

The assembling steps include placing the lever 40 on the outer surface of the upper body A, centering the shaft holes 41, 33 and 31 of the inner and outer members, aligning the shaft holes 41, The key shaft 29 is fitted to the key 42 or 32 of the key shaft 32 and the tip end of the lock shaft 19 is pulled out to the shaft hole 33 opposite to the upper body to fix the key shaft 29 in the axial direction In order.

When the lever 40 is a twin-lever type, that is, in the form of a fork, the latch shaft 19 is fitted in the order of one leg of the lever, one side wall of the casing, the latch claw, the other side wall of the casing, do.

The casing has no holes other than the striker access groove 15, regardless of how it is assembled. There is no gap. In casings without gaps, rainwater, washing water, moisture penetration is blocked, and penetration of foreign matter is completely blocked.

Mounting this back latch on the back panel of the hood or hatch of the heavy equipment or the loading plate prevents the premature corrosion of all the casing internal parts including the inner surface of the casing and the latches and latch catches and the active component in the casing The function failure and the malfunction phenomenon disappear, so that it can be used without durability. The back latch of the present invention can be equally effective even if it is devoted to a car door lock device for a general automobile.

A: upper body
B: Lower body
8: Latch shaft
19: Locking shafts
20: latch
29: Keyway
30: Clasp
31, 33, 41,: Slippery
32, 42: Key
40: Lever

Claims (3)

A back latch for a heavy equipment vehicle comprising a casing having a striker access groove and a body attachment flange, a striker locking latch, a latch catch, a latch shaft, a catch shaft, a latch return means,
Wherein the casing is formed of a combination of an upper body and a lower body and is formed of a non-porous casing having no hole except the lower striker access groove,
The pawl is formed with a shaft hole provided with a key in the shaft hole,
The pawl shaft is formed as an axis to which a keyway to which the key of the pawl is to be fitted is attached,
Wherein a shaft hole of a lever to which a key is attached is fitted to the exposed end of the casing shaft which is inserted into the inside of the casing with the key lock.
The heavy duty back latch according to claim 1, wherein a lower end portion of the lever is provided on an outer surface of the upper body so as to be rotated back and forth from the outside of the casing.
The heavy duty back latch of claim 1, wherein the lever is bi-stable.

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