JPH10119832A - Cab locking structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the cab locking structure which is made light in weight, thereby can try to enhance its operability, concurrently is assembled compactly, and thereby can try to lower manufacturing cost, enhance its assemblage, and facilitate the management of parts and so on. SOLUTION: A tilt locking hand lever 1 is inserted in the inside of a hand lever mounting bracket 2 in which a hand lever clip 3 is inserted, so as to be held therein at the time of locking. Under this condition, a lock pin 4 is transfixed through the tilt locking hand lever 1, the hand lever mounting bracket 2 and the hand lever clip 3 so as to allow these three items to be connected with one another. By this constitution, the hand lever mounting bracket 2 is thereby made smaller so as to be made lighter in weight. Besides, since the tilt locking hand lever 1 and the hand lever mounting bracket 2 are made out of the die casting product of light material such as a magnesium alloy and so on, the structure can thereby be assembled in a light and compact form.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab lock structure for locking a cab of an automobile, and more particularly to a cab lock structure formed to be lightweight and compact.

[0002]

2. Description of the Related Art Many cabs, such as cab-over type trucks, are designed to rotate forward so that an engine room or the like can be inspected. Therefore, at normal times, the cab needs to be locked at a predetermined position, and a cab lock structure is employed. This cab lock structure is shown in FIG.
As shown in the figure, the back panel 32 of the cab 31 and the carrier 3
9 in many cases.

FIG. 11 shows an outline of a cab lock structure generally used conventionally. That is, the cab lock structure includes a hand lever mounting bracket 2a fixed to the back panel 32 of the cab 31, a tilt lock hand lever 1a held by the hand lever mounting bracket 2a, a safety lock lever 33, and the like.

The tilt lock hand lever 1a is rotatably supported by a hand lever mounting bracket 2a, and a connecting rod 35 is pin-connected to one end thereof. The connecting rod 35 is connected to a tilt lock (not shown). A lock is provided between the tilt lock hand lever 1a and the hand lever mounting bracket 2a so that the tilt lock hand lever 1a does not move in the lock release direction when the tilt lock hand lever 1a rotates in the cab locking direction. A pin 4a is provided. On the other hand, the safety lock lever 33 operates a safety lock (not shown) for preventing the unlocked cab 31 from suddenly turning forward, and the coil spring 34 operates the safety lock lever 33 to lock the safety lock lever 33. It is urged to press to the side.

FIG. 12 shows the releasing operation of the cab lock structure shown in FIG. That is, the lock pin 4
is removed, the tilt lock hand lever 1a is released, and the tilt lock hand lever 1a is rotated counterclockwise as shown to unlock the cab.
Here, the safety lock is released by pulling out the safety lock lever 33 against the spring force of the coil spring 34 while holding the tilt grip 36. When the cab 31 is rotated forward with the tilt grip 36 in this state, the cab 31 easily falls forward.

FIG. 13 shows a detailed structure of a main part of a conventional general cab lock structure, which is slightly different from the above cab lock structure in detail structure. The hand lever mounting bracket 2b includes a base 14b fixed to a back panel (not shown), a holding bracket 15b fixed to the base 14, a boss 17b, a stopper 18b, and the like. The holding bracket 15b is bent in an L shape and has a key hole 19b through which the lock pin 4b passes and a holding hole 21b through which a safety lock lever (not shown) passes. The bush 6b is fitted into the holding hole 21b. A key hole 19b having the same shape as the key hole 19b of the holding bracket 15b is formed through the base 14b facing the key hole 19b of the holding bracket 15b.

The tilt lock hand lever 1b is composed of a hand lever body 8b having a hollow elliptical cross section and a grip 9b fitted to the tip end thereof, and a support shaft 10b is formed so as to protrude at the center of rotation. Note that the support shaft 10b is connected to the boss 1
7b is inserted into the support hole 22b, and is secured by the washer 5b and the split pin 7b.

The lock pin 4b is formed of a key member having a key-shaped key portion 29b. One end of the chain 30b is connected to the end opposite to the key portion 29b, and the other end of the chain 30b is connected to the holding bracket 15b. Is connected to the mounting hole 20b.

As shown in the right side of FIG. 4, the tilt lock hand lever 1b is locked as follows. First, the base 1 of the hand lever mounting bracket 2b
A U-shaped hand lever clip 3b is inserted between the holding bracket 4b and the holding bracket 15b, and is fixed by a rivet 37. The tilt lock hand lever 1b is inserted into the hand lever mounting bracket 2b while being held between the hand lever clips 3b. In this state, the lock pin 4b is passed through between the keyholes 19b, 19b, so that the tilt lock hand lever 1b is supported by the lock pin 4b on one side 1b 'and is prevented from falling out toward the hand lever mounting bracket 2b. Will be retained.

[0010] On the other hand, various known techniques relating to the cab lock structure have been disclosed. For example, JP-A-6-27457 and JP-A-6-39677 are mentioned. The former is characterized by a cab lock mechanism, particularly a stopper pin mounting structure, and a plate member (7) and a plate welded to a lock lever (8) and a tilt latch lever (11) in a bracket (5). A member (10) is interposed, and both side plates (5) of the bracket (5) are provided.
a), (5a) and plate members (7), (10)
a), (6a), (9a), and (12a) are formed through and have horizontal grooves (17) and rectangular holes (6) communicating therewith.
b), horizontal grooves (18), (19) and the like are formed. The above-described round hole (6a), rectangular hole (6b), horizontal groove (17), and the like allow the stopper pin (13) to be freely inserted from the front and rear direction and the lateral direction of the cab. In addition, the latter "cab lock device" is a device devised around the insertion hole of the stopper pin (41) so that the cab lock can be checked and the operation of the tilt latch can be checked simultaneously without shortening the length of the carrier. A bracket (21);
It comprises a holding member (22) fixed thereto by welding or the like, an operation lever (23), and the like, and the holding member (22) and the operation lever (23) are separately provided fixed locking plates (37).
And the movable lock plate (39) are respectively fixed.

[0011]

As shown in the right side of FIG. 4 and FIG. 13, in the conventional cab lock structure,
The tilt lock hand lever 1b is located on one side 1 outside thereof.
b 'is held on the hand lever mounting bracket 2b side while the lock pin 4b is in contact with the lock pin 4b.
The base 14b and the holding bracket 15b of the hand lever mounting bracket 2b need to be formed so as to protrude toward the opening edge by the dimensions a and b in FIG. 4, and must be relatively heavy. Further, since the position of the boss 17b supporting the support shaft 10b of the tilt lock hand lever 1b is disposed at least outside the opening edge of the holding bracket 15b, the tilt lock hand lever 1b is stored in the lock position. However, a relatively large rotation angle is required until the operation is completed, and there is a problem that the operability is reduced accordingly.
Furthermore, each component of the conventional cab lock structure is made of an iron material and one obtained by welding and joining the iron material, so that the overall weight is high, the number of parts is large, the production cost is high, the parts management is complicated, and the assemblability is increased. There were even bad problems.

Each of the above-mentioned known techniques has its own features, but it is composed of many parts like the above-mentioned conventional cab lock structure, and has a structure in which they are fixed by welding or the like, and Since it is made of an iron material, there is a problem that the manufacturing cost is high, the assembling takes time, and the weight is high, as in the above-described conventional technology.

An object of the present invention is to solve the above problems and to provide a cab lock structure which is formed to be light in weight, has good operability, is compactly assembled, and has good assemblability and manageability of parts. And

[0014]

SUMMARY OF THE INVENTION In order to achieve the above objects, the present invention provides a tilt lock hand lever for operating a tilt lock, and a tiltable hand lever for rotatably holding the tilt lock hand lever. In a cab lock structure including a hand lever mounting bracket fixed to the panel side, the tilt lock hand lever is detachably mounted by a lock pin that skews the tilt lock hand lever and the hand lever mounting bracket. It constitutes a cab lock structure connected to the hand lever mounting bracket. The hand lever mounting bracket has a U-shaped cross-section formed from a base end surrounding the tilt lock hand lever and both wall portions projecting from the base end. The length from the side to the opening edge is formed to be substantially the same as or slightly shorter than the width in the rotating direction of the tilt lock hand lever. Further, the tilt lock hand lever and the hand lever mounting bracket are integrally formed of a lightweight material, and the tilt lock hand lever and the hand lever mounting bracket are respectively provided on the front surface and / or the back surface for reinforcement. Are provided.

The tilt lock hand lever of the present invention is the same as the prior art in that it is inserted into and held by the hand lever mounting bracket when locked, but the lock pin has a tilt lock hand lever and a hand lever mounting bracket. There is a difference in the structure to skewer and connect the two. Therefore, the hand lever mounting bracket is reduced in size and weight, and the rotation angle during operation is small, so that operability can be improved. Further, the tilt lock hand lever and the hand lever mounting bracket are formed of a lightweight material, and since there is no welding structure, the whole is compactly formed and formed light. Even if a lightweight material is used, the reinforcement ribs are formed, so that the rigidity is hardly reduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the cab lock structure of the present invention will be described below in detail with reference to the drawings. Although the cab lock structure includes components such as a safety lock lever 33 and the like, these components are almost the same as those in the prior art, and in this example, only the main components excluding these components will be described. As shown in FIG. 1, FIG. 5, FIG. 6, and FIG. 7, the hand lever 1 for tilt lock is made of a die-cast molded product of a magnesium alloy in this embodiment, and has a hand lever body having an I-beam cross-sectional shape shown in FIG. 8, a grip 9, and a spindle 10
And reinforcing ribs 11 and the like. In addition, a key hole 12 through which the lock pin 4 can pass is formed in the hand lever main body 8, and a connection hole 13 is formed to connect a connection rod (not shown) connected to a tilt lock (not shown). Since these are integrally molded, they are light and compact. A drain hole for draining water that has entered the grip 9 is formed below the grip 9 (not shown).

As shown in FIGS. 1, 8, and 9, the hand lever mounting bracket 2 includes a base 14 fixed to a back panel of a cab (not shown), a holding bracket 15, which is formed integrally therewith, Support bracket 16, boss 1
7, a stopper 18 and the like, and in this example, a die-cast formed body of a magnesium alloy. Holding bracket 15
Is a bent member having a U-shaped vertical section and bent into an L-shape. The L-shaped bent portion, the U-shaped vertical cross-section, and the base 1
4 to hold the hand lever clip 3 (FIG. 1). The holding bracket 15 is formed with a key hole 19 through which the lock pin 4 penetrates, and an attachment hole 20 to which the chain 30 of the lock pin 4 is connected. Also,
A key hole 19 having the same shape as the key hole 19 of the holding bracket 15 is formed through the base 14 at a position facing the key hole 19 of the holding bracket 15.

A holding hole 21 through which the safety lock lever 33 passes is formed in the support bracket 16 of the hand lever mounting bracket 2, and the mounting hole 2 is formed in the base 14.
3, 24 and 25 are respectively formed. As shown in FIG. 2, a coil spring 34 is provided between the support bracket 16 and the safety lock lever 33. The support shaft 10 of the tilt lock hand lever 1 is pivotally supported in the support hole 22 of the boss 17, and the support shaft 10 is provided with a washer 5.
Through the split pin 7. The bush 6 is fitted into the holding hole 21. Further, as shown in FIG. 8, a reinforcing rib 26 is formed integrally with the hand lever mounting bracket 2 to improve rigidity.

As shown in FIG. 1, the hand lever clip 3 has a U-shaped cross section, and has a grip portion 27 bulging inward inside. A keyhole 28 having the same shape as the keyhole 19 is formed on both side surfaces thereof.
The keyhole 28 is formed so as to be at a position facing the keyhole 19 when the hand lever clip 3 is inserted into a predetermined position of the hand lever mounting bracket 2.

The lock pin 4 is formed of a key member forming a key portion 29 corresponding to the key holes 12, 19, 28 as shown in FIGS. 1 and 2, and the chain 30 connected to one end thereof is held as described above. It is connected to the mounting hole 20 of the bracket 15.

Next, a connection structure of the tilt lock hand lever 1 and the hand lever mounting bracket 2 when the tilt lock hand lever 1 is locked will be described with reference to FIGS. The hand lever clip 3 is inserted between the base 14 and the holding bracket 15 of the hand lever mounting bracket 2. The tilt lock hand lever 1 is held in contact with the back of the hand lever clip 3 and is held by the grip portion 27 of the hand lever clip 3. In this state, the keyholes 19, 2
Since the lock pins 8, 12, 28 and 19 are arranged in a straight line, the lock pin 4 penetrates the tilt lock hand lever 1, the hand lever mounting bracket 2 and the hand lever clip 3, and can skew the three. As described above, the tilt lock hand lever 1 is held and locked in the hand lever mounting bracket 2.

As shown in the left-hand view of FIG. 4, the hand lever 1 for tilt lock differs from the prior art in that the outer side 1b 'of the tilt lock does not abut the lock pin 4 so that both sides of the hand lever mounting bracket 2 are provided. Base 14 corresponding to wall surface
In addition, the dimension of the holding bracket 15 projecting from the base end 15 ′ may be equal to or slightly shorter than the width of the tilt lock hand lever 1.

FIG. 4 compares the lengths of the base 14b and the holding bracket 15b of the conventional hand lever mounting bracket 2b with the base 14 and the holding bracket 15 of the present embodiment. As shown, the base 14 and the base 14b have a shorter base 14 by a dimension c, and the holding brackets 15 and 15b have a shorter holding bracket 15 by a dimension d. Accordingly, the hand lever mounting bracket 2 is formed lighter by that much. Further, in this embodiment, the hand lever mounting bracket 2 is made of a magnesium alloy, and has a specific gravity of 1.80, which is much smaller than that of 7.85 of iron, so that the weight is further reduced.

On the other hand, as described above, in this embodiment, the lock pin 4 engages with the tilt lock hand lever 1 or the like in a skewered state, so that the lock is performed more securely than the lock structure using the conventional lock pin 4b. In addition, rattling noise and the like during cab vibration are less generated, and a noise reduction effect is produced. Also,
Because it consists of a die cast molded product of magnesium alloy,
There is no welding, the number of parts is small, and manufacturing costs can be reduced and assemblability can be improved.

In the above description, the hand lever for tilt lock has an I-beam shape. However, the present invention is not limited to this. The hand lever may have another cross-section shape that can be die-cast. Further, the shape of the hand lever clip is not limited to the illustrated one.

[0026]

【The invention's effect】

1) According to the cab lock structure according to the first and second aspects of the present invention, the tilt lock hand lever and the hand lever mounting bracket are locked in a skewered state by the lock pin. The hand lever mounting bracket is smaller and lighter. In addition, due to the downsizing of the hand lever mounting bracket, the rotation angle at the time of operating the tilt lock hand lever is reduced, and the operability can be improved. 2) According to the cab lock structure according to the third aspect of the present invention, the tilt lock hand lever and the hand lever mounting bracket are made of an integrally molded product of a lightweight material. Since the number of points is small, manufacturing cost can be reduced, assemblability can be improved, and parts management can be facilitated. 3) According to the cab lock structure according to the fourth aspect of the present invention, even if the tilt lock hand lever or the hand lever mounting bracket is formed from a lightweight material, the ribs are provided, thereby preventing a reduction in rigidity. Is done.

[Brief description of the drawings]

FIG. 1 is a divided perspective view showing a schematic structure of main components of a cab lock structure of the present invention.

FIG. 2 is a partial perspective view showing an engagement state when a tilt lock hand lever and a hand lever mounting bracket of the cab lock structure of the present invention are locked, and a lock structure using a lock pin.

FIG. 3 is an enlarged sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view showing a dimensional comparison between a hand lever mounting bracket having a cab lock structure of the present invention and a conventional cab lock structure.

FIG. 5 is a front view of a tilt lock hand lever having a cab lock structure according to the present invention.

FIG. 6 is a left side view of FIG. 5;

FIG. 7 is an enlarged sectional view taken along line BB of FIG. 5;

FIG. 8 is a rear view of a hand lever mounting bracket having a cab lock structure according to the present invention.

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a partial side view of the vehicle for explaining a mounting position of the cab lock structure.

FIG. 11 is a perspective view showing a main part of a conventional cab lock structure.

FIG. 12 is a perspective view for explaining a cab lock releasing operation of the conventional cab lock structure.

FIG. 13 is a divided perspective view showing main components of a general cab lock structure made of a conventional iron material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hand lever for tilt lock 2 Hand lever mounting bracket 3 Hand lever clip 4 Lock pin 5 Washer 6 Bush 7 Split pin 8 Hand lever body 9 Grip 10 Support shaft 11 Rib 12 Key hole 13 Connection hole 14 Base 15 Holding bracket 15 ' Base end portion 16 Support bracket 17 Boss portion 18 Stopper 19 Key hole 20 Mounting hole 21 Holding hole 22 Support hole 23 Mounting hole 24 Mounting hole 25 Mounting hole 26 Rib 27 Gripping portion 28 Key hole 29 Key portion 30 Chain 31 Cab 32 Back panel 33 Safety lock lever 34 Coil spring 35 Connecting rod 36 Tilt grip

Claims (4)

[Claims] 1. A cab lock structure including a tilt lock hand lever for operating a tilt lock, a hand lever mounting bracket and the like which hold the tilt lock hand lever in a rotatable manner and are fixed to a back panel side of a cab. 3. The cab lock structure according to claim 1, wherein the tilt lock hand lever is detachably connected to the hand lever mounting bracket by a lock pin for skewing the tilt lock hand lever and the hand lever mounting bracket. 2. The hand lever mounting bracket,
It has a U-shaped cross-section formed from a base end surrounding the tilt lock hand lever and both wall portions projecting from the base end, and the length from the base end to the opening edge of the wall surface is 2. The cab lock structure according to claim 1, wherein the cab lock structure is formed to have substantially the same width as or slightly shorter than the width of the tilt lock hand lever in the rotation direction. 3. The cab lock structure according to claim 1, wherein the tilt lock hand lever and the hand lever mounting bracket are integrally formed of a lightweight material. 4. The tilt lock hand lever and the hand lever mounting bracket are provided with reinforcing ribs on the front surface and / or the back surface, respectively.
4. A cab lock structure according to any one of claims 1 to 3.