JP2004224163A - Lock mechanism of slide door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock mechanism of a slide door that can reduce operating force of an occupant that is required to lock the slide door and that can ensure locking of the slide door while occurrence of half-locking is prevented. <P>SOLUTION: This lock mechanism of a slide door 6 includes lock assist means 10 for energizing the slide door 6 that is at a half-locked position to move the door 6 to the locked position. The lock assist means 10 includes an electric motor 11 and an assist lever 12 mounted on the rotation shaft of the motor 11. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lock mechanism for a slide door, and more particularly, to a lock mechanism for holding a slide door in a closed lock position and / or an open lock means for holding a slide door in an open lock position. The present invention relates to a lock mechanism for a sliding door having the following.
[0002]
[Prior art]
For example, there is a hydraulic shovel, which is an embodiment of a construction vehicle, that employs a sliding door that moves along the outer surface of the cab so as not to protrude outside the cab when the door is opened.
[0003]
The slide door is slidably supported via rollers on guide rails or the like laid on the cab, and has a closed position for closing a cab opening (door opening) and a cab opening (door opening). It moves between an open position and an open position, and is configured to be locked in a closed position where the boarding opening is closed by a locking means using a latch / striker mechanism including, for example, a latch and a striker engaged with and disengaged from the latch. (For example, see Patent Document 1).
[0004]
Further, in the construction vehicle such as the above-mentioned hydraulic excavator or the like, work may be performed in a state where the slide door is left open. Some devices include means (open lock means) for locking the slide door in the open position where the mouth is open.
[0005]
[Patent Document 1]
JP 2001-107391 A [Problems to be Solved by the Invention]
Incidentally, in a construction vehicle having a slide door lock mechanism as described above, a lock reaction force of a latch / strike mechanism constituting a lock means, a reaction force of a seal member interposed between the cab and the slide door, and the like. However, when the sliding door is locked at the open position or the closed position, a large operating force is imposed on the crew member, so that it is difficult to say that the operability (usability) is good.
[0006]
In addition, when the slide door is locked in the open position or the closed position due to the large lock reaction force of the latch / strike mechanism and the large reaction force of the seal member, the lock means is configured. In some cases, a so-called half-lock (half-door) state occurs in which the engagement between the latch and the striker ends unsuccessfully, so that there is a disadvantage that the locking of the slide door becomes uncertain.
[0007]
SUMMARY OF THE INVENTION An object of the present invention is to provide a slide door capable of reducing the operation force of an occupant required for locking a slide door in view of the above-described situation, and also capable of securely locking the slide door by suppressing the occurrence of half-lock. To provide a lock mechanism.
[0008]
Means and effects for solving the problem
In order to achieve the above object, a lock mechanism for a slide door according to the present invention includes both a close lock means for holding a slide door in a closed lock position and an open lock means for holding a slide door in an open lock position. Alternatively, a lock mechanism for a slide door having one of a close lock means and an open lock means, wherein the lock urges the slide door occupied in the semi-lock position close to the lock position to move to the lock position. It is characterized by having assist means.
[0009]
According to the above configuration, since the slide door is moved to the lock position by the lock assist means, a large operation force against the lock reaction force of the close lock means or the open lock means is required when locking the slide door. In addition, the slide door can be held at the lock position, so that the operation force of the occupant can be greatly reduced.
[0010]
Further, according to the above configuration, since the slide door occupied in the half-lock position is moved to the lock position by the lock assist means, the slide door is half-locked (half-door) against the crew's intention. In this case, the slide door can be held at the lock position, and the lock of the slide door can be secured by preventing the occurrence of half-lock. .
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing examples.
1 to 7 show an example in which a lock mechanism for a slide door according to the present invention is applied to a hydraulic excavator which is an embodiment of a construction vehicle.
[0012]
As shown in FIGS. 1 and 2, the excavator 1 includes a lower traveling body 2 having a traveling mechanism of a crawler type, and an upper revolving body 3 mounted and supported on the lower traveling body 2. A work machine 4 equipped with a boom, a bucket, and the like is installed in 3, and an operator's cab 5 for both traveling and work machines is provided.
[0013]
As shown in FIG. 3, the cab 5 includes a cab main body 5A in which an exterior panel is mounted on a frame formed in a cage shape, and a slide door 6 attached to a side surface of the cab main body 5A. are doing.
[0014]
The slide door 6 is closed with respect to the cab main body 5A as shown in FIG. 3 (a) to close the boarding port 5B (lock position), and is opened as shown in FIG. 3 (b). Between the open position (lock position).
[0015]
The operator's cab 5 is provided with closing lock means for holding the slide door 6 at a closed position (lock position) and open lock means for holding the slide door 6 at an open position (lock position). The lock means and the open lock means are constituted by a well-known latch / strike mechanism (not shown).
[0016]
Since the specifics of the latch / striker mechanism are already well known, a detailed description of the structure and operation of the closing and opening locking means will be omitted.
[0017]
As shown in FIG. 4, the cab main body 5A in the cab 5 is provided with a closed lock assisting means 10 described later in detail, while the slide door 6 is engaged with the closed lock assisting means 10. A matching closing lock pin 6C is attached.
[0018]
The cab main body 5A includes a closing operation detection switch Sc for detecting a state in which the slide door 6 is occupied in the half-lock position shown in FIG. And a closed lock detection switch Scr for detecting a state where the vehicle is occupied in the closed position (lock position) shown in FIG.
[0019]
Here, the semi-locked position shown in FIG. 4A means that when the occupant closes the slide door 6, it is very close to the closed position (locked position) shown in FIG. This indicates a state in which the slide door 6 is not held by the closing lock means (not shown) including the striker mechanism.
[0020]
As shown in FIG. 5, the closing lock assisting means 10 has an electric motor 11 and an assist lever 12 attached to a rotating shaft of the electric motor 11, and the assist lever 12 has a bent shape at the tip. Present.
[0021]
The assist lever 12 of the closing lock assisting means 10 swings between a standby position indicated by a two-dot chain line and a lock position indicated by a solid line in FIG. 5 based on the operation of the electric motor 11. The electric motor 11 is provided with a potentiometer (not shown) for detecting the swing position of the assist lever 12.
[0022]
Now, when the slide door 6 is moved from the open position to the closed position in order to close the boarding port 5B of the cab main body 5A, the slide door 6 slides to the half-lock position shown by the dashed line in FIGS. When the door 6 is reached and the sliding door 6 is detected by the closing operation detecting switch Sc, the assist lever 12 of the closing lock assist means 10 swings from the standby position to the locking position in the direction of arrow Rc in FIG. Start moving.
[0023]
The assist lever 12 of the closing lock assisting means 10 is stopped in a retracted position that does not interfere with the slide door 6 that moves between the closed position and the open position in a normal state other than during operation.
[0024]
After the assist lever 12 starts swinging in the direction of the arrow Rc from the standby position, the assist lever 12 comes into contact with the closing lock pin 6C of the slide door 6 as shown by a dashed line in FIG. 5, and further locks shown by a solid line in FIG. By oscillating toward the position, the slide door 6 is urged through the close lock pin 6C, and the slide door 6 is moved to the closed position (lock position) indicated by a solid line in FIGS. The door 6 is moved.
[0025]
In this manner, the sliding door 6 moved to the closed position (lock position) by the operation of the closed lock assisting means 10 is moved to the closed position (locked position) by the closed lock means including the latch / strike mechanism. 5A.
[0026]
Thereafter, when the potentiometer (not shown) of the closing lock assisting means 10 detects that the assist lever 12 has reached the lock position, or when a predetermined time has elapsed from the start of the swing of the assist lever 12, the assist lever is activated. When the lock lever 12 is estimated to have reached the lock position, or when it is detected by the close lock detection switch Scr that the slide door 6 is at the close position (lock position), the assist lever 12 of the close lock assist means 10 is turned on. It swings from the lock position to the evacuation position, and stops at this evacuation position.
[0027]
According to the above-described slide door lock mechanism, the slide door 6 in the semi-lock position is moved to the close position (lock position) based on the operation of the close lock assist means 10, so that the latch / strike mechanism is provided. The sliding door 6 can be locked in the closed position without requiring a large operation force against the lock reaction force or the like of the closing lock means composed of the above, and the operation force on the occupant can be greatly reduced. Good operability (usability) can be obtained.
[0028]
Here, when the slide door 6 is moved at a stroke to the closed position (lock position) by the occupant's large operating force and the slide door 6 is locked by the close lock means, the closed lock detection switch Scr is set to the closed position (locked). By detecting the sliding door 6 at the position (position), the operation of the closing lock assist means 10 is controlled so as not to operate at all.
[0029]
On the other hand, although the slide door 6 is moved to the closed position (lock position) at a stretch to lock it, the operation by the occupant is insufficient, and the lock by the close lock means is attempted, and the slide door 6 is in the half-lock position. According to the above-described lock mechanism of the slide door, the slide door 6 can be held at the closed position (locked position) even when the lock state is half-locked (half-door).
[0030]
That is, as described above, when the slide door 6 occupying the half-lock position is detected by the closing operation detection switch Sc, the assist lever 12 of the closing lock assist unit 10 swings from the standby position to the lock position. Is started and the slide door 6 is urged to move to the closed position (lock position), whereby the slide door 6 is held by the cab body 5A by the closed lock means.
[0031]
As described above, in the above-described lock mechanism of the slide door, the slide door 6 occupied in the half-lock position is moved to the closed position by the operation of the close lock assisting means 10, so that it is contrary to the crew's intention. Even when the slide door 6 is in a half-locked (half-door) state (in a situation where the crew is not aware), the slide door 6 can be locked in the closed position, so that the half-lock occurs before it occurs. , The locking of the slide door 6 can be ensured.
[0032]
As shown in FIG. 6, the cab main body 5A in the cab 5 is provided with an open lock assist means 20, which will be described in detail later, while the slide door 6 is engaged with the activated open lock assist means 20. A matching open lock pin 60 is attached.
[0033]
The cab main body 5A includes an opening operation detection switch So for detecting a state in which the slide door 6 is occupied in the half-lock position shown in FIG. 6A, and a slide door 6 shown in FIG. And an open lock detection switch Sor for detecting a state where the vehicle is occupied in the open position (lock position) shown in FIG.
[0034]
Here, the half-lock position shown in FIG. 6 (a) means that when the occupant opens the slide door 6, it is very close to the open position (lock position) shown in FIG. This indicates a state in which the slide door 6 is not held by the open lock means (not shown) including the striker mechanism.
[0035]
As shown in FIG. 7, the open lock assist means 20 has an electric motor 21 and an assist lever 22 attached to a rotating shaft of the electric motor 21. The assist lever 22 has a linearly extending shape. Is presented.
[0036]
Further, the assist lever 22 of the open lock assist means 20 swings between a standby position indicated by a two-dot chain line in FIG. 7 and a lock position indicated by a solid line based on the operation of the electric motor 21. The electric motor 21 is provided with a potentiometer (not shown) for detecting the swing position of the assist lever 22.
[0037]
Now, when the slide door 6 is moved from the closed position to the open position in order to open the boarding port 5B of the cab main body 5A, the slide door 6 is moved to the half-lock position shown by the one-dot chain line in FIGS. When the sliding door 6 is reached and the sliding door 6 is detected by the opening operation detection switch So, the assist lever 22 of the opening lock assisting means 20 moves from the standby position to the locking position in the direction of arrow Ro in FIG. Start rocking.
[0038]
Note that the assist lever 22 of the open lock assisting means 20 is stopped at a retracted position that does not interfere with the slide door 6 that moves between the closed position and the open position in a normal state other than during operation.
[0039]
After the assist lever 22 starts swinging in the direction of arrow Ro from the standby position, the assist lever 22 comes into contact with the open lock pin 60 of the slide door 6 as shown by a dashed line in FIG. 7 and then locks as shown by a solid line in FIG. By swinging toward the position, the slide door 6 is urged through the open lock pin 60, and the slide door 6 is moved to the open position (lock position) indicated by the solid line in FIGS. The door 6 is moved.
[0040]
As described above, the slide door 6 moved to the open position (lock position) by the operation of the open lock assisting means 20 is moved to the open position (lock position) by the open lock means including the latch / strike mechanism. 5A.
[0041]
Thereafter, when the potentiometer (not shown) of the open lock assisting means 20 detects that the assist lever 22 has reached the lock position, or when a predetermined time has elapsed from the start of the swing of the assist lever 22, the assist lever is turned on. When it is estimated that the sliding door 22 has reached the lock position, or when it is detected by the open lock detection switch Sor that the slide door 6 is in the open position (lock position), the assist lever 22 of the open lock assist means 20 is turned on. It swings from the lock position to the evacuation position, and stops at this evacuation position.
[0042]
According to the lock mechanism of the slide door described above, the slide door 6 in the semi-lock position is moved to the open position (lock position) based on the operation of the open lock assist means 20, so that the latch / strike mechanism is provided. The sliding door 6 can be locked in the open position without requiring a large operation force against the lock reaction force of the open lock means composed of Good operability (usability) can be obtained.
[0043]
Here, when the slide door 6 is moved to the open position (lock position) at a stretch by the occupant's great operating force and the slide door 6 is locked by the open lock means, the open lock detection switch Sor is set to the open position (lock). By detecting the slide door 6 at the position (position), the operation of the open lock assist means 20 is controlled so as not to operate at all.
[0044]
On the other hand, although the slide door 6 was moved to the open position (lock position) at a stretch and tried to be locked, the operation force of the occupant was insufficient, and the lock by the open lock means was attempted, and the slide door 6 was in the half-lock position. According to the above-described lock mechanism of the slide door, the slide door 6 can be held in the open position (lock position) even when the lock state is half-locked (half-door).
[0045]
That is, as described above, when the slide door 6 occupying the half-lock position is detected by the opening operation detection switch So, the assist lever 22 of the opening lock assisting means 20 swings from the standby position to the lock position. Is started and the slide door 6 is urged to move to the open position (lock position), whereby the slide door 6 is held by the cab body 5A by the open lock means.
[0046]
As described above, in the above-described slide door lock mechanism, the slide door 6 occupied in the half-lock position is moved to the open position by the operation of the open lock assist means 20, so that the crew is contrary to the intention of the crew. Even when the slide door 6 is half-locked (half door) (in a situation where the crew member is not aware), the slide door 6 can be locked in the open position, so that half-lock occurs before it occurs. , The locking of the slide door 6 can be ensured.
[0047]
FIG. 8 shows another embodiment of the lock mechanism according to the present invention. This open / close lock assist means 30 includes one electric motor 31 and an assist lever 32 attached to a rotation shaft of the electric motor 31. The assist lever 32 includes a closing lock lever 32c and an open locking lever 32o.
[0048]
Further, based on the operation of the electric motor 31, the assist lever 32 of the open / close lock assist means 30 moves the close lock lever 32c to the standby position (solid line) and the lock position (second position) as shown in FIG. 8B, the open lock lever 32o swings between the standby position (solid line) and the lock position (two-dot line) as shown in FIG. 8B. The electric motor 31 is provided with a potentiometer (not shown) for detecting the swing position of the assist lever 32.
[0049]
That is, the open / close lock assisting means 30 is an assist lever 32 in which the assist lever 12 of the closed lock assisting means 10 and the assist lever 22 of the open lock assisting means 20 in the embodiment shown in FIGS. Is pivoted by one electric motor 31, and its operation mode is basically the same as the closed lock assist means 10 and the open lock assist means 20 of the embodiment shown in FIGS. 1 to 7.
[0050]
Also in the lock mechanism of the slide door including the above-described opening / closing lock assist means 30, similarly to the lock mechanism of the embodiment shown in FIGS. Needless to say, the sliding door can be reliably locked while the occurrence of the half lock can be suppressed.
[0051]
Further, in the lock mechanism of the slide door provided with the open / close lock assist means 30 described above, one electric motor 31 constituting the open / close lock assist means 30 assists the slide door 6 in closing and opening lock. Since the lever 32 is oscillated, the number of components for constructing the lock mechanism is reduced as compared with the embodiment shown in FIGS. 1 to 7, so that the space and the cost can be reduced as much as possible. Can be achieved.
[0052]
Note that the lock mechanism in the above-described embodiment includes both closed lock means and open lock means composed of a latch / striker, and includes two lock assist means of closed lock assist means and open lock assist means. However, it is also possible to provide only one lock assist means of the closed lock assist means or the open lock assist means.
[0053]
Further, it is provided with only one of the closed lock means and the open lock means comprising a latch / striker, and a lock assist means corresponding to the lock means (a closed lock assist means for the closed lock means and an open lock assist means for the open lock means). , It is also possible to constitute a lock mechanism for the slide door.
[0054]
In the above-described embodiment, each of the closing lock assisting means and the opening lock assisting means is constituted by an electric motor (rotary electric machine) and an assist lever which is swung by the electric motor. As long as the lock assist means is provided with an ability to surely move by a distance, for example, various drive mechanisms such as a linear actuator can constitute the lock assist means.
[0055]
Further, the layout (installation position) of each lock assist means and the layout (installation position) of the close lock pin and the open lock pin are not limited to those in the embodiment, but may be, for example, various specifications such as design specifications in a cab. Needless to say, it can be appropriately set based on conditions.
[0056]
In the above-described embodiment, the closing lock pin and the opening locking pin are attached to the slide door. However, if the member can reliably receive the urging force to the slide door by the corresponding lock assist means, the pin Instead, various members such as brackets can be employed.
[0057]
Further, an opening or a cut-and-raised portion provided in the sliding door can be used as a substitute for each of the locking pins described above. , Cut-and-raised portions, steps, projections, etc.), use of these portions can prevent an inadvertent increase in the number of components.
[0058]
Further, in the above-described embodiment, an example in which the present invention is applied to a hydraulic shovel which is an embodiment of a construction vehicle is shown. However, various construction vehicles other than the above-described hydraulic shovel, and various slide vehicles such as a work vehicle. It goes without saying that the present invention can be effectively applied to various vehicles having doors.
[Brief description of the drawings]
FIG. 1 is an overall side view of a hydraulic shovel employing a slide door lock mechanism according to the present invention.
FIG. 2 is an overall plan view of the hydraulic excavator shown in FIG.
FIG. 3 is a side view of a cab of the excavator shown in FIG. 1;
FIG. 4 is a conceptual diagram showing an embodiment of a lock mechanism for a slide door according to the present invention.
FIG. 5 is a conceptual diagram showing an operation mode of a closing lock assist unit.
FIG. 6 is a conceptual diagram showing one embodiment of a lock mechanism for a slide door according to the present invention.
FIG. 7 is a conceptual diagram showing an operation mode of an open lock assist unit.
FIG. 8 is a conceptual diagram showing another embodiment of the lock mechanism of the slide door according to the present invention.
[Explanation of symbols]
1. Hydraulic excavator,
5 ... cab,
5A ... cab body,
5B ... Boarding gate,
6 ... Slide door,
6C… Close lock pin,
6O: Open lock pin,
10 ... Closed lock assist means,
11 ... electric motor,
12 ... Assist lever,
Sc: closing operation detection switch
Scr: Closed lock detection switch
20: Open lock assist means,
21 ... Electric motor,
22 ... Assist lever,
So: Open operation detection switch,
Sor open lock detection switch
30 ... open / close lock assist means,
31 ... Electric motor,
32 ... Assist lever.

Claims (1)

Closed lock means for holding the slide door in the closed lock position, open lock means for holding the slide door in the open lock position, or a slide door having one of the closed lock means and the open lock means A locking mechanism,
A lock mechanism for a slide door, comprising lock assist means for urging the slide door occupying a half-lock position close to the lock position to move to the lock position.

Images