JPH0437765Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to a handle for a cabin door in an industrial vehicle such as a forklift or a shovel loader.

(Prior Art) In large-sized industrial vehicles such as forklifts and shovel loaders, the cabin is generally installed at a high position because it is necessary to accurately grasp the surrounding situation. Therefore, the cabin door will also be installed at a high position, but installing the outside handle for opening and closing the cabin door at a high position will make it difficult to operate from the ground. The appropriate location for the handle is at the bottom of the cabin door.

On the other hand, the door handle inside the cabin is generally arranged near the position of the outside handle, and is arranged inside the lower part of the cabin door. The inside handle is located close to the floor inside the cabin, making it extremely difficult for the driver in the driver's seat to open and close the cabin door.

In order to solve this problem, we have implemented a configuration in which the inner handle is placed almost above the outer handle, near the vertical center of the cabin door, and the locking mechanism near the outer handle and the inner handle are linked so that they can be unlocked by a link mechanism. has been done.

(Problem that the invention aims to solve) However, recently, the lower part of the cabin door is made of glass to expand the field of view from inside the cabin, and the thickness of the cabin door is made as small as possible from the viewpoint of reducing the weight of the cabin door and improving operability. Considering the cabin configuration, the conventional configuration that restricts the link mechanism to the vertical path requires the link mechanism to be arranged so as to protrude not only outside the thickness of the cabin door but also outside the thickness of the door frame. Become something. In such a configuration, the link mechanism that protrudes outside the thickness of the door frame obstructs driving operation. If an attempt is made to accommodate the link mechanism within the thickness of the door frame in order to avoid this problem, the storage area will increase and the area of the glass portion will inevitably be reduced.

Structure of the invention (means for solving problems) Therefore, the present invention provides a cabin door for an industrial vehicle that has a glass-covered portion between an intermediate frame and a lower frame that are installed between the front and rear frames within the thickness of the door frame. , the outer handle of the cabin door is disposed on either the front end side or the rear end side of the outer surface of the lower frame, and the inner handle is the same as the outer handle in the front-rear direction of the inner surface of the intermediate frame. A cabin door locking mechanism is disposed near one of the inner and outer handles, and is operatively connected to one of the handles via an operating member. The frame on the side away from both the inner and outer handles, the lower frame, and the intermediate frame form a substantially U-shaped continuous transmission path. A transmission mechanism is housed to operatively connect the handle on the side remote from the lock mechanism and the lock mechanism, so that the lock mechanism can be unlocked based on the operation of either the inner or outer handle.

(Function) That is, a substantially U-shaped transmission path is formed by the front and rear frames on the side remote from both the inner and outer handles, the lower frame, and the intermediate frame, bypassing the glass-covered portion at the bottom of the cabin door. A transmission mechanism is housed within the thickness of each frame constituting the transmission path for operatively connecting the lock mechanism to the handle on the side away from the lock mechanism among the inner and outer handles. Further, when the handle operatively connected to the locking mechanism via the transmission mechanism is operated, the transmission mechanism is driven within the thickness of each frame in the plane direction of the cabin door.

(Example) Hereinafter, an example in which the present invention is embodied in a large forklift will be described based on FIGS. 1 to 4.

Figure 1 shows the entire forklift, with front wheels 1
A fork 4 is disposed on the front surface of the vehicle body 3 supported by the rear wheels 2 so as to be movable up and down. A cabin 5 is fixedly installed on the vehicle body 3, and houses and protects operating members such as a driver's seat 6 and a steering wheel 7, instruments, and the like. A door 8 is attached to the side of the cabin 5 so that it can be opened and closed.
A ladder 9 is fixedly installed on the side surface of the vehicle body 3 from the step 3a to the lower end of the cabin door 8.

The front, rear, and side surfaces of the cabin 5 are covered with glass G1, and the cabin door 8 is also covered with a lower glass G2 and an upper glass G3 that is slidable up and down.

The cabin door 8 is rotatably attached to the door frame 40 of the cabin 5 on the rear frame 11 side of the four frames 10, 11, 12, and 13, front and rear, and is mounted within the thickness of the frame 40. An outer handle 14 is disposed on the front end side of the outer surface of the side frame 13. A push button 15 as an actuating member is disposed near the outer handle 14 in a slidable manner in a storage cylinder 16 and is housed so as to be pressed outward by a pressing spring 17. pin 15
a can protrude into the lower frame 13.

As shown in FIGS. 3 and 4, the vicinity of the outer handle 14, that is, the front frame 10 and the lower frame 1
A locking mechanism 18 is disposed within the intersection with 3. To explain the lock mechanism 18, a support plate 19 is erected and fixed on the inner wall surface on the outside handle 14 side at the intersection of the front frame 10 and the lower frame 13. A mounting plate 20 bent at right angles is erected and supported on the rear surface of the support plate 19 (on the right side in FIG. 3), and a substantially dogleg-shaped lever 21 is mounted on the shaft of the mounting plate 20. It is rotatably supported around 22. A shaft pin 23 is rotatably inserted through the lower end of the support plate 19 from the rear side, and an intermediate lever 24 is fixed to the shaft pin 23 on the rear side of the support plate 19 . Support plate 1
A first catch piece 25 is fixed to the front surface of the catch piece 9, and a second catch piece 26 is fixed to the shaft pin 23 within the catch piece 25. A coil spring 27 is interposed between them. The spring 27 biases the shaft pin 23 to rotate counterclockwise in FIG. 4. When the lever 21 is rotated counterclockwise in FIG.
4 is rotated clockwise about the shaft pin 23 from the solid line position shown in FIG. 4 to the chain line position against the coil spring 27. In addition, when the pin 15a of the push button 15 is projected in FIG.
5a comes into contact with the contact plate 24a of the intermediate lever 24,
The intermediate lever 24 is rotated about the shaft pin 23 from the solid line position shown in FIG. 4 to the chain line position against the coil spring 27.

In the locking mechanism 18 having such a structure, the locking rod 28 protruding from the vertical door frame 40 of the cabin 5 corresponding to the locking mechanism 18 is introduced and held between the two catch pieces 25 and 27, thereby locking the cabin door 8. is locked.

An intermediate frame 29 is installed between the front and rear frames 10 and 11 near the vertical center of the cabin door 8, and a drawer is provided inside the front end of the intermediate frame 29, that is, on the inside of the intermediate frame 29 corresponding to the upper part of the outer handle 14. A rotating unlocking handle 30 (hereinafter referred to as the inner handle) is provided. As shown in FIGS. 1 and 2, the intermediate frame 29 is set at a slightly higher position than the driver's seat 6, and is housed within the thickness of the cabin door 8, that is, the thickness of the front and rear and upper and lower frames 10, 11, 12, and 13. ing. Direction change levers 31 and 32 are rotatably disposed at the intersections of the rear frame 11, intermediate frame 29, and lower frame 13, respectively, and between the inner handle 30 and the upper direction change lever 31. , between the upper and lower direction change levers 31 and 32, and the lower direction change lever 3
Connecting rods 33, 34, and 35 are connected between the lever 21 of the locking mechanism 18 and the lever 21 of the locking mechanism 18, respectively. That is, a pair of upper and lower lateral paths and both inner and outer hands 30, 14 are connected by a link mechanism of direction change levers 31, 32 and connecting rods 33, 34, 35.
A substantially U-shaped transmission path called a vertical path connecting both lateral paths is formed on the side separated from the center.
A turnbuckle 36 is interposed in the middle of the connecting rod 35, so that the length of the connecting rod 35 can be adjusted.

Now, when the locking rod 28 is caught between the first and second catch pieces 25 and 26 as shown by the chain line in FIG. The lever 21 is rotated counterclockwise in FIG. 4 through the link mechanism, and the intermediate lever 24 is rotated clockwise around the shaft pin 23 in FIG. Accordingly, the second catch piece 26 is rotated integrally against the coil spring 27 from the solid line position shown in FIG. 4 to the chain line position, and the locking rod 28 is pushed out from between the two catch pieces 25 and 26. It will be in the form of That is, the locking rod 28 is no longer held between the two catch pieces 25 and 26, and the cabin door 8 moves in the opening direction. Therefore, if the cabin door 8 is pushed in the opening direction from this state, the cabin door 8 will be opened.

In this unlocking operation, since the installation position of the inner handle 30 is set at a slightly higher position than the driver's seat 6, the driver sitting on the driver's seat 6 can maintain the normal driving posture while holding the inner handle 3.
0 can be easily reached, and opening the cabin door 8 from inside the cabin 5 requires an extremely simple operation.

The intermediate frame 29 is housed within the thickness of the cabin door 8, that is, the substantially U-shaped link mechanism is housed within the thickness of the cabin door 8. This is obtained from the operation, and therefore does not interfere with the driver's work operations during work. Moreover, the configuration of the transmission path as described above makes it possible to cope with the trend toward further thinning of the cabin door 8, and contributes to reducing the weight of the cabin door 8 and improving the opening/closing operability. Since the intermediate frame 29 is located inside both the upper and lower glasses G2 and G3, it also serves as an armrest when not working.

Further, since the substantially U-shaped link mechanism bypasses the glass G2 portion at the bottom of the cabin door 8, the field of view in the vicinity of the left and right sides of the forklift is secured to the conventional level, and the surrounding situation can be accurately grasped.

On the other hand, if the outer handle 14 is grasped and the push button 15 is pressed with the thumb while the cabin door 8 is in the locked state shown in FIG. 24 rotates clockwise around the shaft pin 23. Therefore, both catch pieces 2
When the locking rod 28 is released from being held by the locking rods 5 and 26, the cabin door 8 is opened by pulling the outside handle 14.

Since the outer handle 14 is disposed at the lower end of the cabin door 8, which is the lower frame 13 of the cabin door 8 installed at a high position, the opening operation of the cabin door 8 from the ground is easy.

Note that if the cabin door 8 is applied to the cabin 5 with a certain degree of rotational speed, the locking rod 28
against the coil spring 27, both catch pieces 25, 2
6, and the cabin door 8 is locked and closed.

The present invention is, of course, not limited to the above-mentioned embodiment; for example, the embodiment shown in FIG. 5 is also possible. In this embodiment, the intermediate frame 37 is mounted on the inner surfaces of both the front and rear frames 10 and 11 so as to protrude into the cabin 5 and fit within the thickness of the door frame 40, and is linked to the inner handle 30. The connecting rod 33 and the connecting rod 34 in the rear frame 11 are connected to each frame 37, 1 by a direction changing lever 38 which is rotatably supported at the connecting portion between the intermediate frame 37 and the rear frame 11.
They are connected within 1. Reference numeral 39 denotes a handle recess that is integrally formed on the upper surface of the central portion of the intermediate frame 37. Also in this embodiment, since the intermediate frame 37 is housed within the thickness of the door frame 40, it does not interfere with the work of the operator sitting in the driver's seat.
Furthermore, since the intermediate frame 37 protrudes into the cabin 5 compared to the previous embodiment, it can be used more effectively as an armrest, and can also be used as a grip for opening and closing the cabin door 8.

Furthermore, in the present invention, the inner handle 30 is installed in the center of the intermediate frame 29, the locking mechanism is installed near the inner handle, or the direction is changed from the above-mentioned embodiment to the extent that the opening operation is not hindered. The transmission mechanism may be constructed by providing rollers instead of levers and using wires instead of connecting rods.

Further, in the embodiment of the present invention, the cabin door 8 is made rotatable on the rear frame 11 side with respect to the door frame 40, but it may be configured to be rotatable on the front frame 10 side. In this case, both the inner and outer handles 14 and 30 will be disposed at the rear end sides of the intermediate frame 29 and the lower frame 13, respectively.

Further, in the above embodiment of the present invention, the cabin door 8 was configured to be rotated to open and close with respect to the door frame 40, but
It is also possible to adopt a structure of an opening/closing sliding type which is conventionally known for cabin doors of industrial vehicles. In that case, both the inner and outer handles 14,
30 are disposed at the ends of the intermediate frame 29 and the lower frame 13 on the side where the cabin door 8 is slid in the left-right direction when the cabin door 8 is closed.

Furthermore, the present invention can be implemented in other industrial vehicles such as shovel loaders.

Effects of the invention As detailed above, in this invention, the inner handle of the cabin door is provided at the height of the intermediate frame, and the outer handle is provided at the height of the lower frame. Not only can it be easily operated from both the inside and outside, but the transmission path for accommodating the transmission mechanism that operatively connects the handle on the side away from the locking mechanism and the locking mechanism is located in the glass section at the bottom of the cabin door. By detouring, the front and rear frames are formed in a substantially U-shape by the frame on the side away from the inner and outer handles, the lower frame, and the middle frame, so that the transmission mechanism allows the field of view from inside the cabin through the glass part to be It is possible to secure a sufficient field of view in the vicinity of the left and right sides of the forklift without being obstructed, and each frame that makes up the transmission path is installed within the thickness of the door frame, and Since the transmission mechanism is driven in the plane direction of the cabin door, there is no fear that the transmission mechanism will interfere with the driver's work operation, and there is an excellent effect that work operability during work can be improved.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment embodying the present invention, with Figure 1 being a side view of a forklift, Figure 2 being a vertical cross-sectional view showing the inside of the cabin door, and Figure 3 being a front view with the main parts cut away. , FIG. 4 is a partially cutaway side view, and FIG. 5 is a longitudinal sectional view of a main part showing another example. 5...cabin, 8...cabin door, 10...
...Front frame, 11...Rear frame, 13...
...Lower frame, 14...Outside handle, 15...
...Push button as an operating member, 18...Lock mechanism, 29, 37...Intermediate frame, 30...
...Inner handle, 31, 32...Direction change lever that constitutes the transmission mechanism, also 33, 34, 35...
...Connecting rod, 40...Door frame, G2...Lower glass as glass part.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cabin door of an industrial vehicle that has a glazed part between an intermediate frame and a lower frame installed between the front and rear frames within the thickness of the door frame, An inner handle is arranged on either the front end side or the rear end side of the outer surface of the side frame, and an inner handle is arranged on the same side as the outer handle in the front-rear direction of the inner surface of the intermediate frame, and both the inner and outer handles are arranged. A cabin door locking mechanism is disposed near one of the handles and is operatively connected to one of the handles via an operating member, and a locking mechanism for a cabin door is disposed near one of the handles, and a locking mechanism for a cabin door is disposed in the vicinity of one of the handles. A substantially U-shaped continuous transmission path is formed by the lower frame and the intermediate frame, and within the thickness of each frame constituting the transmission path, there is a handle on the side away from the lock mechanism of the inner and outer handles, and the handle on the side away from the lock mechanism. A handle for a cabin door in an industrial vehicle, which houses a transmission mechanism for operatively connecting a lock mechanism, and is capable of unlocking the lock mechanism based on operation of either the inner or outer handle.