JP4301127B2 - Cabin lock device - Google Patents

Description

  The present invention relates to a cabin lock device for a cabin in an industrial vehicle such as a forklift truck having a cabin pivotally attached to a vehicle body and a cargo vehicle such as a cab over truck.

In general, as shown in FIGS. 7 and 8, a cabin 51 having a driver's seat as a single box is mounted so as to be tiltable with respect to the vehicle body frame 53 so as to cover the upper part of the engine room 52 of the vehicle body. In an industrial vehicle such as a forklift truck and a cargo vehicle such as a cab over truck, the cabin 51 has one end of a cabin frame 51a that forms the floor surface thereof hinged to the vehicle body frame 53, and a biasing member 54 such as a torsion bar, a spring, and a hydraulic damper. It is pivotally attached so that it can always be biased in the opening direction.
At the other end of the cabin frame 51a, a hook member 55b that can be engaged with and disengaged from a locking pin member 55a fixed to the vehicle body frame 53 is attached. 55b is connected to the operation lever 57, and the lock lever 55 is released and locked by operating the operation lever 57. The cabin 51 has an impact mitigating action when the cabin 51 is locked by a mount member 58 fixed to the vehicle body frame 53 side (or the floor side of the cabin 51).

In this cabin lock device, the lock mechanism 55 is unlocked, the cabin 51 is tilted with respect to the vehicle body frame 53 by the action of a biasing member 54 such as a torsion bar and a spring, and the upper part of the engine room 52 is opened. Check and maintain the engine.
After completion of inspection and maintenance, the cabin 51 is pivoted and lowered, the cabin frame 51a of the cabin 51 is brought into contact with the mount member 58, the impact at the time of lowering is reduced, and the cabin 51 is locked by the lock mechanism 55 ( For example, see Patent Document 1 and Patent Document 2.)
Japanese Patent Laid-Open No. 11-335094 (FIGS. 15-16) Japanese Patent Laid-Open No. 10-119832 (FIGS. 11-13)

  However, in the conventional cabin lock device, the lock mechanism 55 and the mount member 58 are individually attached, and the hook locking strength for preventing the lock mechanism 55 from being unlocked unexpectedly and the mount member. It was necessary to adjust the level of the cabin 51 by adjusting both of the heights 58 while adjusting the heights 58, and the adjustment work was troublesome.

  The lock mechanism 55 is also rubber-mounted by the mount member 58. However, if the components of the lock mechanism 55 are not floated firmly, vibration noise transmitted from the vehicle body frame 53 side, vibration generated from each component of the lock mechanism 55, etc. May be transmitted to the cabin 51 via the lock mechanism 55.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to generate both noises with simple adjustments, which have both functions of a cabin lock and a mount pivotably attached to the vehicle body. An object of the present invention is to provide a cabin lock device having a suppressed lock mechanism.

  In order to achieve the above object, a first aspect of the present invention provides a lock plate provided on the cabin side pivotally attached to the vehicle body so as to be tiltable, and a mount that can be engaged and disengaged with a fitting hole formed in the lock plate. The lock part and the mount part constitute a lock mechanism by fixing the part to the vehicle body side, and the mount part has a locking groove that can be engaged with a part of the peripheral wall of the lock hole of the lock plate, The lock plate is slidably held by a guide mechanism attached to a bracket extending from a cabin.

  The invention according to claim 2 is characterized in that a mount portion is fixed to a cabin side pivotably attached to a vehicle body, and a fitting hole capable of engaging and disengaging the mount portion is formed on the vehicle body side. A lock plate is provided to form a lock mechanism with the lock plate and the mount portion, and the mount portion has a locking groove that can be engaged with a part of the peripheral wall of the lock hole of the lock plate. It is characterized by being slidably held by a guide mechanism attached to a bracket extending from the vehicle body.

According to the first and second aspects of the present invention, the fitting hole of the lock plate that is held slidably by the guide mechanism by lowering and rotating the cabin tilted with respect to the vehicle body, and the locking groove are provided. By fitting and fitting with the mounted mount portion, the bracket receives the bracket at the mount portion and reduces the impact caused by the downward rotation of the cabin.
When the engagement hole peripheral wall of the lock plate and the locking groove of the mount part face each other, the lock plate slides along the guide mechanism, and when the part of the engagement hole peripheral wall engages with the locking groove, the mount part Thus, the movement of the lock plate in the vertical direction and the horizontal direction is elastically prevented, the vibration from the vehicle body side is prevented from being propagated to the cabin side, and the lock plate is elastically floated.
Further, the lock plate is slid to release the engagement between the lock plate and the mount portion, and a part of the peripheral wall of the fitting hole is separated from the locking groove of the mount portion, thereby disengaging the two members. The cabin is raised and tilted with respect to the vehicle body.

  According to a third aspect of the present invention, in the cabin lock device according to the first or second aspect, the mount portion guides a rubber mount member that cushions and supports the bracket, a fitting hole of the lock plate, and the The guide member is formed by a guide member having a locking groove and fixedly supported by the rubber mount member.

  According to a fourth aspect of the present invention, in the cabin lock device according to the third aspect, at least the rubber mount member of the mount portion has a vibration isolating function and is made of a material that can elastically support the cabin with respect to the vehicle body. It is characterized by being formed.

  According to the third and fourth aspects of the present invention, the guide member is fixed to the rubber mount member, and when the cabin is locked, the fitting hole of the lock plate is guided by the guide member to allow the descent, and the rubber mount member The bracket is elastically deformed and received to mitigate the impact caused by the downward rotation of the cabin.

  According to a fifth aspect of the present invention, in the cabin lock device according to any one of the first to fourth aspects, the guide mechanism that slidably holds the lock plate is mainly horizontal to the lock plate. It is characterized by comprising a stopper plate for restricting the moving range in the direction and a guide plate for mainly restricting the moving range in the vertical direction.

  According to a sixth aspect of the present invention, in the cabin lock device according to the fifth aspect, the stopper plate of the guide mechanism has a protrusion formed on a lower surface thereof, and the lock plate includes a protrusion of the stopper plate. A notch that can be engaged when facing each other is formed.

  According to the fifth and sixth aspects of the invention, when releasing the lock, the lock plate is moved horizontally, and when the cutout portion faces the protrusion of the stopper plate, one end side of the lock plate is lifted (lifted by a spring or the like). The lock plate is maintained in a state in which the movement in the horizontal direction is restricted by engaging the notch with the protrusion of the stopper plate.

According to the present invention, the cabin lock mechanism pivotably attached to the vehicle body is a lock mechanism having both the lock function and the mount function. By simply moving in the direction, the cabin can be released from engagement with the mount and tilted with respect to the vehicle body, and the engine room can be opened to facilitate start-up inspections and repairs.
When the cabin, which is in a tilted state, is lowered and turned back to the horizontal state after the start of inspection and repair, etc., the fitting holes of the guide mechanism and the lock plate are guided and fitted by the mount part. The impact force due to the downward rotation of the cabin is reduced and supported, and the mount part elastically prevents the lock plate from moving up and down and horizontally, so that the cabin can be locked and the lock plate and guide mechanism No special floating is required.

(First embodiment)
The cabin lock device according to the first embodiment will be described below with reference to FIGS.
The cabin lock device of this embodiment is suitable for a cabin 51 of an industrial vehicle such as a forklift truck or a cargo vehicle such as a cab over truck, and the driver's seat is formed in one box as schematically shown in FIG. The cabin 51 is mounted so as to be tiltable with respect to the vehicle body frame 53 so as to cover the upper part of the engine room 52 of the vehicle body, and one end of the cabin frame 51 a forming the floor surface of the cabin 51 is hinged to the vehicle body frame 53. It is pivotally attached so as to be always capable of being tilted in the opening direction through a biasing member 54 such as a torsion bar, a spring, or a hydraulic damper. A lock plate 1 constituting a part of a lock mechanism described later is attached to the other end of the cabin frame 51a.

As shown in FIGS. 1, 2, 4, and 6, the lock plate 1 is slidably held at least in the horizontal direction by a bracket 2 attached to the other end of the cabin frame 51a.
The structure of the bracket 2 will be described in more detail. The bracket 2 includes a top plate 2a screwed to the cabin frame 51a, a pair of side plates 2b extending obliquely downward from the top plate 2a, and the side plates 2b. The guide plate 2c is fixed to the lower end of the guide plate, and the guide plate 2c constitutes a part of the guide mechanism. The guide plate 2c has a guide hole 2d having a diameter smaller than that of a rubber mount member 61 that constitutes a part of the mount portion 6 described later. A hook 2e that holds one end of the biasing member 3 such as a tension spring is fixed to the top plate 2a.

  In the figure, reference numeral 4 denotes a stopper plate, which has protrusions 4a on both ends of the lower surface. Between the lower surface of the protrusion 4a of the stopper plate 4 and the guide plate 2c, the lock plate 1 slides in the horizontal direction. It is attached to the side plate 2b of the bracket 2 with an allowable gap. The stopper plate 4 and the guide plate 2c constitute a guide mechanism for the lock plate 1. The protrusions 4a are not necessarily formed on both ends, and may be only on the side farthest from the cabin rotation fulcrum, that is, the rear end.

  The movement range in the vertical direction is mainly restricted by the guide plate 2c and the stopper plate 4 forming the guide mechanism, and the stopper plate 4 is slidably held by the guide mechanism while the movement range in the horizontal direction is mainly restricted. The flat plate-like lock plate 1 has an upright piece 1a at a position facing the front end surface of the stopper plate 4 on the side close to the cabin rotation fulcrum, that is, on the front end side (left side in FIG. 2). On the right side in FIG. 2, gripping plates 1b are respectively attached. In addition, the lock plate 1 is fitted in an oblong shape at the center portion of the guide plate 2c that is larger in diameter than the guide hole 2d of the guide plate 2c and whose center point is drilled at a position that can coincide with the center point of the guide hole 2d. A hole 1d is formed.

Furthermore, when facing the rear end side protrusion 4a of the stopper plate 4 at a position behind the rear end side position of the fitting hole 1d on the both side ends of the lock plate 1 and close to the grip plate 1b, A notch 1c that engages and restricts the movement range of the lock plate 1 mainly in the horizontal direction is formed by the protrusion 4a. When the cabin 51 is in the horizontal state (locked state), this notch The part 1c and the rear end side protruding part 4a are in a non-fitted state.
In the figure, reference numeral 1e denotes a hook that protrudes from the gripping plate 1b, and the other end of the tension spring 3 is hooked to urge the lock plate 1 diagonally forward (upward on the left side in FIG. 4).

In the figure, reference numeral 6 denotes a mount portion, which is disposed on the vehicle body frame 53 at a position where the bracket 2 attached to the other end side of the cabin frame 51a can be mounted.
The mount portion 6 includes a rubber mount member 61 fixed on the vehicle body frame 53, and a guide member 62 that is placed and fixed on the rubber mount member 61 to engage and disengage the guide plate 2c. The mount portion 6 and the lock plate 1 constitute a lock mechanism.

The rubber mount member 61 can elastically support the bracket 2 of the cabin 51 with at least a vibration isolating function by sandwiching an elastic portion 61a such as elastically deformable hard rubber and the upper and lower surfaces of the elastic portion 61a. The guide member 62 is integrally formed on the rubber mount member 61 by screwing the bolt 7 fitted to the shaft center of the guide member 62 into a screw hole formed of the support portion 61b and formed in the shaft center portion. It is placed and fixed.
The diameter of the rubber mount member 61 is larger than the diameter of the guide hole 2d of the guide plate 2c, and the guide plate 2c is buffered and supported on the upper surface of the rubber mount member 61.

Like the rubber mount member 61, the guide member 62 is made of an elastic material such as hard rubber having at least an anti-vibration function, and the diameter of the guide member 62 is smaller than the diameter of the guide hole 2d of the guide plate 2c. The inclined surface 62b formed on the upper side facilitates fitting with the guide hole 2d of the guide plate 2c.
An annular locking groove 62 a is formed in the intermediate portion of the guide member 62 and engages with the rear end side portion of the peripheral wall of the fitting hole 1 d of the lock plate 1.
Further, the formation position of the locking groove 62a is locked via the guide plate 2c buffered and supported by the rubber mount member 61 when the fitting hole 1d of the lock plate 1 is engaged with the locking groove 62a. It is desirable that the plate 1 is in contact with the lower surface side including the protruding portion 4a of the stopper plate 4.

Next, cabin operation by the cabin lock device according to this embodiment will be described.
When the engine room 52 in the closed state is opened and a start-up inspection or the like is performed, the unlocking operation of the cabin 51 in the locked state as shown in FIG. The grip plate 1b of the lock plate 1 constituting a part of the lock mechanism is pulled backward (to the right in FIGS. 2 and 4) against the urging force of the tension spring 3. As the lock plate 1 moves in the horizontal direction, the rear side of the peripheral wall portion of the fitting hole 1d that is engaged with the locking groove 62a of the guide member 62 that forms part of the locking mechanism is separated from the locking groove 62a. Then, the restrained state of both is released (the state shown in FIGS. 3 and 5).

  Further, the movement of the gripping plate 1b is continued, and when the notch 1c of the lock plate 1 faces the rear end protrusion 4a of the stopper plate 4 forming a part of the guide mechanism, the rear end side of the lock plate 1 is Lifted by the urging force of the tension spring 3, the notch 1 c is engaged with the protrusion 4 a, and even if the grip plate 1 b is released, the movement of the lock plate 1 in the horizontal direction is restricted and the lock plate 1 The unlocked state is maintained.

  When a push-up force is applied to the cabin 51 at the time when the lock is released, the cabin 51 is acted upon by a biasing member 54 such as a torsion bar and a spring attached to the hinge coupling portion side of the cabin frame 51a with the vehicle body frame 53. 51 tilts upward with respect to the vehicle body frame 53, the guide plate 2 c held by the bracket 2, the guide hole 2 d of the lock plate 1 and the fitting hole 1 d come out of the mount portion 6, and the upper part of the engine room 52 is opened. The engine can be inspected and maintained.

  After completion of inspection and maintenance, the cabin 51 is lowered and moved so that the bracket 2 of the cabin frame 51a approaches the mount member 6, and the guide hole 2d and the fitting hole 1d of the guide plate 2c and the lock plate 1 are mounted. Fit into part 6. At this time, the downward rotation moment of the cabin 51 is reduced when the guide plate 2c passes through the guide member 62 of the mount portion 6 and contacts the upper surface of the rubber mount member 61, and the bracket 2 of the cabin frame 51a It is held by a rubber mount member 61 of the mount portion 6.

If the guide plate 2c is seated on the upper surface of the rubber mount member 61 and the downward movement of the bracket 2 is restricted, the grip plate 1b of the lock plate 1 is pushed down to engage with the rear end protrusion 4a of the stopper plate 4. The notch 1c of the lock plate 1 in the combined state is detached from the protrusion 4a.
By releasing this engagement, the lock plate 1 is guided by the guide mechanism by the urging force of the tension spring 3 and automatically moves forward (to the left in FIGS. 2 and 4) horizontally, and the lock plate 1 is engaged. The rear side, which is a part of the peripheral wall portion of the hole 1d, is fitted into and engaged with the engaging groove 62a of the guide member 62 in the mount portion 6 constituting a part of the locking mechanism, and further horizontal movement is restricted.

  When the lock plate 1 is engaged with the locking groove 62a and the cabin 51 is locked with respect to the vehicle body frame, the lock plate 1 is moved upward by the elastic force of the rubber mount member 61 via the guide plate 2c. The pushing force is applied to the upper wall of the locking groove 62a to bring the cabin 51 into a locked state in which the upward movement is restricted (the state shown in FIGS. 2 and 4).

The cabin lock device according to this embodiment has the following effects.
(1) A locking device for the cabin 51 pivotably attached to the vehicle body is formed by concentrating most of the extremely simple components of the guide mechanisms 2c and 4 and the locking mechanisms 1 and 6a on the mount portion, and By combining both functions of the lock and the mount, the lock device can be easily attached and adjusted, and the cabin can be restrained and released easily by the lock device.
(2) The unlocking operation of the cabin in the locked state can be performed only by moving the lock plate 1 in the horizontal direction with respect to the locking groove 62a of the mount portion 6, and from the locked state by the mount portion 6 of the cabin. The restraint can be easily released, and the tilting operation with respect to the vehicle body can be performed quickly.

(3) Since the lock plate 1 constituting a part of the lock mechanism can be restrained from moving in the horizontal direction by the protrusion 4a of the stopper plate 4 when in the unlocked state, the cabin is lowered and the lock plate 1 is fitted. The hole 1d can be smoothly fitted into the mount portion 6, and the lock full rate 1 can be released in this state to engage with the mount portion 6 to be locked. That is, in the series of flow up to the locked state based on the downward rotation of the cabin after the lock plate 1 is gripped, the mount portion 6 can perform a plurality of functions such as locking the cabin, mitigating the impact when lowered, and holding the mount. .
(4) By incorporating the lock mechanism into the mount portion 6, a dedicated floating device for preventing the occurrence of vibration, noise, etc. generated from the lock mechanism becomes unnecessary, and the number of parts and assembly man-hours can be reduced. .

(5) The mount portion 6 can alleviate the impact when the cabin 51 is lowered and can suppress the transmission of the vehicle body vibration transmitted from the vehicle body frame 53 to the cabin 51 in the cabin lock state.
(6) Since the lock plate 1 is always urged toward the pivot shaft side of the cabin by an urging member such as a tension spring, the engagement with the mount portion 6 is ensured when the cabin is locked. The locked state is maintained by urging in the direction, and the locked state of the lock plate 1 can be prevented by maintaining the engaged state with the stopper plate 4 when the cabin is unlocked.

The present invention is not limited to the first and second embodiments described above, and various modifications are possible within the scope of the gist of the invention. For example, the following modifications may be made.
In the first embodiment, the bracket 2 having the lock plate 1 is disposed on the cabin side and the mount portion 6 is disposed on the vehicle body frame 53 side. However, the mount portion 6 is disposed on the cabin side and the vehicle body frame 53 side. You may arrange | position the bracket 2 which has the lock plate 1 to.
Thereby, since the lock plate 1 which is a movable operation member is on the side of the vehicle body frame which is easy to operate, the operability can be further improved, and the lock plate 1 is engaged with the stopper plate 4 after the cabin is unlocked. By releasing the engagement, it is possible to perform an automatic engagement operation between the locking groove 62a in the mount portion 6 and the lock plate 1 when the cabin is locked.
The guide member 62 of the mount portion 6 does not necessarily have to be an elastic member, and may be a metal as long as it can be easily fitted with the guide hole 2d of the guide plate 2c of the guide mechanism and the fitting hole 1d of the lock plate 1. It may be a member.

It is a principal part exploded explanatory view of the cabin lock device concerning the embodiment of the present invention. It is a principal part top view which shows the locked state of the cabin lock apparatus which concerns on embodiment of this invention. It is a principal part top view which shows the lock release state of the cabin lock apparatus which concerns on embodiment of this invention. FIG. 3 is a side view taken along the line AA in FIG. 2. It is a principal part cutaway side view in FIG. It is a BB cut side view in FIG. It is a perspective view which shows the conventional cabin lock apparatus typically. It is explanatory drawing which shows typically the locking mechanism in the conventional cabin lock apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock plate 1c Notch part 1d Fitting hole 2 Bracket 2c Guide plate 2d Guide hole 3 Tension spring 4 Stopper plate 4a Protrusion part 4b Downstream pipeline 51 Cabin 51a Cabin frame 53 Body frame 6 Mount part 61 Rubber mount part 62 Guide Member 62a Locking groove 1, 6 Lock mechanism 2c, 4 Guide mechanism

Claims (6)

A lock plate is provided on the cabin side that is pivotally attached to the vehicle body so that the lock plate can be tilted, and a mounting portion that can be engaged with and disengaged from a fitting hole formed in the lock plate is fixed to the vehicle body side, and the lock plate and the mount portion are fixed. The mount portion has a locking groove that can be engaged with a part of the peripheral wall of the lock hole of the lock plate, and the lock plate is attached to a bracket that extends from the cabin. A cabin lock device that is slidably held by a guide mechanism. The lock plate is provided with a lock plate in which a mount portion is fixed to a cabin side pivotally attached to the vehicle body, and a fitting hole in which the mount portion can be engaged and disengaged is formed on the vehicle body side. And the mount portion constitute a lock mechanism, and the mount portion has a locking groove engageable with a part of the peripheral wall of the lock hole of the lock plate, and the lock plate is attached to a bracket extending from the vehicle body. A cabin lock device which is slidably held by an attached guide mechanism. The mount portion is formed by a rubber mount member that cushions and supports the bracket, and a guide member that guides the fitting hole of the lock plate and has the locking groove and is fixedly supported by the rubber mount member. The cabin lock device according to claim 1 or 2, wherein the cabin lock device is provided. The cabin lock device according to claim 3, wherein at least a rubber mount member of the mount portion has a vibration-proof function and is formed of a material capable of elastically supporting the cabin with respect to a vehicle body. The guide mechanism that slidably holds the lock plate includes a stopper plate that mainly restricts a movement range of the lock plate in a horizontal direction and a guide plate that mainly restricts a movement range in the vertical direction. The cabin lock device according to any one of claims 1 to 4, wherein the cabin lock device is provided. The stopper plate of the guide mechanism has a protrusion on its lower surface, and the lock plate has a notch that can be engaged when facing the protrusion of the stopper plate. The cabin lock device according to claim 5, wherein:

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