JPH017609Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a door device for a tractor cabin.

Conventionally, the cabin of a tractor is generally provided with a door that can be opened and closed, and the door shown in FIG. 1 is a typical example of such a door. That is, the door 1 is composed of a transparent window material 2 made of glass or plastic, which is divided into two parts vertically, and a door frame 3 fixed to the periphery of the window material 2. Therefore, an intermediate frame 4, which is a part of the door frame 3, is positioned substantially horizontally between the upper and lower window members 2, and this intermediate frame 4 improves the visibility from the driver's seat. is being prevented. Next, as another typical example, there is one that has a single flat window material without an intermediate frame, and although the visibility from the driver's seat is good, the window material is large and the window material of the window material is large. The rigidity in the direction perpendicular to the material surface is reduced, and membrane vibrations and muffled sounds due to membrane vibrations are likely to occur, and the door frame must have a strong structure to prevent the window material from falling off.

This invention was devised in view of these points, and the purpose is to obtain a door device for a tractor cabin that can improve visibility from the driver's seat and increase the rigidity of the window material in the direction perpendicular to the surface of the window material. That is.

This idea improves the visibility of the outside of the door from the driver's seat by using a single large transparent window material on the tractor cabin door, and the window material is fixed to the window material and the periphery of the window material. By bending the door frame in a substantially dogleg shape in such a way that it protrudes outward at the center in the vertical direction, the rigidity of the window material in the direction perpendicular to the surface of the window material is increased, and the rigidity of the window material is increased due to the membrane vibration and membrane vibration of the window material. This prevents muffled noise inside the cabin, and also increases the strength of the door frame by providing a rod-shaped reinforcing member along the bent part on the inside of the door and connecting this reinforcing member to the door frame and window material. The structure is such that the door frame can be made lighter.

An embodiment of this invention will be explained based on FIGS. 2 to 5. A cabin 6 is fixed to a tractor body 5 surrounding a driver's seat space, and a door 7 is attached to a side surface of the cabin 6 so as to be openable and closable. This door 7 is composed of a window material 8 made of transparent glass or plastic and a door frame 9 fixed to the periphery of the window material 8, and the window material 8 is made into a large-sized integral body. The window material 8 and the door frame 9 are bent at approximately the center in the vertical direction into a substantially V-shape so as to protrude outward. Inside the door 7, a rod-shaped reinforcing member 10 whose front and back ends are fixed to the door frame 9 is provided along the bent portion of the door 7, and the substantially central part of the reinforcing member 10 and the window material A connecting member 11 is connected between the front, rear, and upper and lower central portions of 8 .

In such a configuration, since the window material 8 is a large integrated object, visibility of the outside of the door 7 from the driver's seat is improved. In addition, since the window material 8 and the door frame 9 are bent in a substantially dogleg shape, the rigidity of the window material 8 in the direction perpendicular to the window material surface is increased, and the window material 8 is less likely to cause membrane vibration. Muffled noise inside the cabin 6 due to vibrations is prevented. Further, by providing a reinforcing member 10 along the bent portion of the door 7 and connecting this reinforcing member 10 to the door frame 9 and the window material 8, the strength of the door frame 9 is increased, and the door frame 9 is made thinner and lighter. This makes it possible to use plastics with a small Young's modulus as the window material 8. Furthermore, door 7
The reinforcing member 10 may be used as a handle when opening and closing. Note that the reinforcing member 10 is formed into a rod shape and has a small diameter, so that it does not obstruct the view.

This invention has the above-mentioned structure, so visibility from the driver's seat can be improved by making the transparent window material into a large integrated piece, and by bending the door into an approximately dogleg shape, the window can be seen. By increasing the rigidity of the material in the direction perpendicular to the window material surface, it is possible to prevent the occurrence of membrane vibration and muffled noise inside the cabin due to membrane vibration, and by providing a rod-shaped reinforcing member on the door. This has effects such as increasing the strength of the door frame and reducing the weight of the door frame.

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional example, Fig. 2 is a side view showing an embodiment of the invention, Fig. 3 is an enlarged side view of the door, Fig. 4 is a longitudinal rear view thereof, and Fig. 5 is a side view showing an embodiment of the invention.
The figure is a perspective view thereof. 5... Airframe, 6... Cabin, 7... Door, 8
... Window material, 9 ... Door frame, 10 ... Reinforcement member, 11 ... Connection member.

Claims (1)

[Scope of utility model registration request] A cabin surrounding the driver's seat space is provided in the body of the tractor, and a door consisting of a transparent window material and a door frame fixed to the periphery of the window material is provided on the side of the cabin, and the window material and the door The frame is bent in a substantially dogleg shape so as to protrude outward at approximately the center in the vertical direction, and a rod-shaped reinforcing member whose front and rear ends are fixed to the door frame is provided inside the door along the bent portion; A door device for a tractor cabin, characterized in that a substantially central portion of the reinforcing member and a substantially central portion of the window material in the longitudinal and vertical directions are connected by a connecting member.