JP2001107391A - Slide door for construction machine cab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slide door for a construction machine cab prevented from increasing a clearance between a striker and a holder in a case of setting a lock angle large and having a hold mechanism reducing a shock feeling in approaching the slide door from the outward than usual. SOLUTION: In the side door moving along the outside face of a construction machine cab and opening/closing the door opening part, a striker 8 is provided in the closing end of the door 1 and a door holder 10 having a receiver part 10a of the striker rotationally moving relative to the striker is provided in a cab post 9 in the closing end side. The slide door moves by guided by a slide rail 2 provided along the outside face of the construction machine cab. This machine can be formed with a flange in a receiver part of the striker and formed with a swelled part moving the closing end of the slide door inward the cab in the cab post side of the slide rail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door used in a cab (operator's cab) of a construction machine, and more particularly to a holding mechanism for the sliding door.

[0002]

2. Description of the Related Art Cab of construction machinery (hereinafter referred to as cab).
In order to prevent the door from protruding from the swivel table even when the cab door is opened on the swivel table during the work,
In some cases, a sliding door disclosed in Japanese Patent Publication No. 12556 and shown in FIG. 12 is used. In this case, the door D is supported via a roller on a slide rail or the like laid on the inside of the front edge of the cab C, below, or in the middle of the outside, and the door is slid along the outside of the cab to slide the door opening O. To open and close. In addition, the one that supports the front and rear of the sliding door on the cab by a link and slides the door along the outside of the cab by rotating the link also belongs to the category of the sliding door.

[0003] Japanese Patent Laid-Open No. 9-235753 discloses a hold mechanism for holding a closed end of a slide door, that is, an end which is a leading end when the door is closed, on a cab post on the closed end side when the slide door is closed. And those shown in FIG. 13 were employed. That is, these have a holder H having a receiving port M attached to the cab post P side and a striker S fixed to a closed end of the slide door D, and the receiving port M has a tapered hole as described in the above publication. 12, or a mountain-shaped recess m having a gentle inclined surface facing the outside of the cab as shown in FIG. With such a configuration, when the slide door D is closed, the striker S at the door closed end is used.
Is to enter the receptacle M of the holder H to hold the door.

[0004]

However, when the sliding door D is closed, the closing end of the sliding door D is rotated about a lock point L (see FIG. 1) of the open end on the opposite side to the closed end while substantially rotating. Since it enters the holder H obliquely from the outside of the cap C, the receiving port M of the holder H needs to be a tapered hole or a concave part having a wide front, so that there is a gap between the cap H and the striker S. This makes it difficult to secure a fixed position in the direction perpendicular to the door D, especially when the slide door is closed.

This will be described with reference to FIG. 13. If the lock angle β formed by the gentle inclined surface m ′ of the concave portion m is not outside the approach angle α of the closing end of the slide door D, the slide door D closes. Sometimes, when the door D enters from outside, the striker S collides with the holder H to generate an impact sound, and it is necessary to re-enter the sliding door D. However, the striker S is connected to the receiving port M of the holder H.
When the lock angle β is made large in order to easily enter the striker, the gap with the striker S is increased as described above.

Accordingly, the problem to be solved by the present invention is that even if the lock angle is increased, the gap between the striker and the holder does not increase, and therefore, when the slide door is closed, particularly when the slide door is closed, the angle is set at a right angle to the door. It is an object of the present invention to provide a slide toe for a cab of a construction machine, which has a hold mechanism that can easily secure a position and can reduce the impact feeling even when the slide door enters from outside than usual.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a slide door of a construction machine cab moves along the outer surface of a construction machine cab to open and close a door opening. A striker is provided at a closed end of the cab post, and a cab post on the closed end side is provided with a door holder on which a receiving portion of the striker is turned so as to face the striker. In a sliding door that moves and is guided by a slide rail provided along the outer surface of the door and that opens and closes a door opening, a striker is provided at a closed end of the door,
According to a second aspect of the present invention, a door holder is provided on the cab post on the closed end side, on which a striker receiving portion is turned so as to face the striker.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a slide toe of a cab of a construction machine according to the present invention will be described in detail with reference to FIGS. In the drawing, reference numeral 1 denotes a sliding door of the present invention, and as shown in FIG. 3, this door 1 is constituted by a single transparent plastic plate or the like which covers from the front surface of the cab to approximately half of the left outer surface. 1 is supported by a plurality of arms 3 and rollers 4 and 4 'shown in FIG. 1 on slide rails 2 laid mainly below and inside the front edge of the cab C (the rear part of the door is located at positions c and d in FIG. 3). ) And guided along the rail 2 to move along the outside of the cab C. As a result, when the slide door 1 is fully opened, almost half of the left outer side surface is opened. Reference numeral 5 is a puller for the slide door 1.

The slide rail 2 comprises a slide door 1
At the closed end 1a side of the cab C, it is bent like an inner side 2a, and the sliding door 1 is closed at the closed end 1a.
Has a lock point L on the opposite side 1b. The sliding door 1 has a closed end 1a side as shown in the continuous operation diagram of FIG. 1 by a rotating action about the bent portion 2a of the slide rail 2 and the lock point L (see FIGS. 1 and 3). Be guided.

Reference numeral 6 denotes a slide door holding mechanism according to the present invention, which is a frame 7-2 of the closed end 1a of the slide door 1.
A striker 8 at the location and, correspondingly, a closed end 1
Door holders 10 for receiving and holding the striker 8 are fixed to cab posts 9 on the a side at positions a and b shown in FIG.

As shown in detail in FIGS. 4 and 5, the striker 8 has a contact portion 8b which is slightly tilted down from the substrate 8a. The striker 8 shown in FIG. Is made of a synthetic resin, a non-ferrous metal or the like, and fixes the substrate 8a to the frame 7 of the closed end 1a of the door 1 with bolts 11.

Details of the door holder 10 are shown in FIGS.
As shown in FIG. 7, a receiving member 10-1 including a receiving portion 10a and a supported portion 10c having a stopper 10b formed by bending the upper and lower portions of the receiving portion 10a into a U-shape. The coil spring 10-2 is rotatably supported on the L-shaped mounting member 10-4 by a pin 10-3 penetrating the mounting member 10-4 and the receiving member 10-1.
The stopper 10b of the receiving member 10-1 is urged so as to always contact one corner of the mounting member 10-4.

When such a door holder 10 is fixed to the cab post 9 with a bolt 12 via a mounting member 10-4, as shown in FIGS. 1 and 2, the receiving portion 10a of the receiving member 10-1 When viewed from the outside of C, it is arranged to retreat toward the cab post 9 as it goes further from the front.

Next, the operation of the slide door of the cab of the construction machine of the present invention constructed as described above will be described with reference to FIG. 1. The slide door 1 is moved from the open state to the cab post 9 side by the puller 5. Then, the door 1 moves as shown in the continuous operation diagram of FIG. 1 by the clockwise turning action about the bent portion 2a of the slide rail 2 and the lock point L, and the closed end 1a side of the door 1 is moved to the cab point. 9
Approach.

A striker 8 fixed to the closed end 1a is formed.
As shown in FIG. 2, the tip of the contact portion 8b first contacts the receiving portion 10a of the door holder 10 fixed to the cab post 9, and the receiving portion 10a is turned counterclockwise against the coil spring 10-2. While rotating, the main body of the contact portion 8b of the striker 8 comes into contact with the receiving portion 10a. Due to the rotation of the receiving portion 10a of the door holder 10 against the coil spring 10-2, the sense of impact on the door post 9 of the slide door 1 is reduced. Also, the striker 8 of the sliding door 1
It comes into contact with the receiving portion 10a of the door holder 10 as described above,
The receiving part 10a is pressed in a rotated state, and the closed end 1a side of the door 1 is held (held) in this state.

When the slide door 1 is to be opened, a separate lock mechanism (not shown) is released, and the puller 5 is strongly pulled toward the side opposite to the closed end 1a. Since the side 1a is guided by the bent portion 2a of the slide rail 2 and tries to rotate counterclockwise about the lock point L, the striker 8 moves away from the receiving portion 10a of the door holder 10. This allows
The door 1 is released from the holding action by the door holder 10,
Receiving member 10- of door holder 10 having receiving portion 10a
1 returns to the position where the stopper 10b abuts on the mounting member 10-4 by the coil spring 10-2.

FIG. 8 differs from those shown in FIGS. 1 and 2 only in the door holder 21 and the slide rail 22. That is, the door holder 21 shown in FIG.
Is basically the same as that shown in FIGS. 1 to 7, except that a galling preventing flange 21d is formed at the end on the far side of the receiving portion 21a. As a result, as shown in FIG. 9, (1) even when the closed end 20a side of the slide door 20 excessively enters the inside of the cab C (solid line), and conversely, (2) the closed end 20a side is outside the cab C. The striker 8 is also in the receiving portion 2 when it is shaken (dotted line).
1a can be reliably engaged and held. 1 and 2, when the slide door 1 is closed, there is a possibility that the striker 8 may go deeper than the state (solid line) in FIG. 10
When the slide door 1 is closed without contact with the a, and the door 1 is pulled as described above to open it, the back surface of the striker 8 and the tip of the receiving portion 10a come into contact with each other to generate so-called galling. Although there is a possibility that the sliding door 1 cannot be opened, there is no such a possibility in the one shown in FIG.

The slide rail 22 shown in FIG.
This is also basically the same as that shown in FIG. 1, except that a “bulge” 22b is added near the tip of the bent portion 22a. As a result, when the striker 8 of the slide door 20 contacts the receiving portion 21a of the holder 21 and then rotates the receiving portion 21a counterclockwise, as shown in FIG. The roller 4 moves into the "bulge" 22b of the slide rail 22 and moves the closed end side to the back of the cab C. The positional relationship between the receiving portion 21a and the striker 8 as shown in FIG. A positional relationship is set such that the distance between the line “a” passing in parallel with the direction of the striker 8 and the line “b” passing in parallel with the opening direction of the slide door 20 and passing through the outermost portion of the receiving portion 21a is large. The sliding door 20 is securely held.

[0019]

According to the present invention, a slide door of a cab for a construction machine moves along an outer surface of a cab for a construction machine, and in a slide door for opening and closing a door opening, a striker is provided at a closed end of the door and the closure is provided. The first invention is characterized in that a door holder on which a striker receiving portion is rotated opposite to the striker is provided on the end cab post, and a slide rail provided along the outer surface of the construction machine cab. In a sliding door which is guided and moved to open and close a door opening, a striker is provided at a closed end of the door, and a receiving portion of the striker rotates on the cab post on the closed end side in opposition to the striker. Since the door holder is provided, the gap between the striker and the holder is increased even if the lock angle is increased. Therefore, it is easy to secure a fixed position in the direction perpendicular to the door, especially when the slide door is closed, and furthermore, there is provided a hold mechanism which can reduce the above-mentioned impact even if the slide door enters from outside. There is an effect that a sliding door of the mechanical cab can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a main part of a slidable door of a cab of a construction machine according to a first embodiment of the present invention in a continuous operation.
Showing the XX section of

FIG. 2 is an enlarged schematic plan view showing a part of FIG. 1;

FIG. 3 is an external perspective view of a construction machine cab provided with the sliding door of the present invention.

FIG. 4 is a perspective view showing an example of a striker in a slide toe of a cab of a construction machine according to the present invention.

FIG. 5 is a perspective view showing another example of the striker in the slide toe of the cab of the construction machine according to the present invention.

FIG. 6 is a front view showing an example of a holder in the slide toe of the cab of the construction machine according to the present invention.

FIG. 7 is a plan view showing an example of a holder in the slide toe of the cab of the construction machine according to the present invention.

FIG. 8 is a schematic plan view showing a main part in a second example of the slide tor of the cab of the construction machine of the present invention.

FIG. 9 is an explanatory view of a positional relationship before contact between a striker and a door holder in a second example of the slide door of the cab of the present invention.

FIG. 10 shows the second slide tor of the cab of the construction machine according to the present invention.
Plan view illustrating the relationship between a slide rail and rollers in an example

FIG. 11 shows the second slide tor of the cab of the construction machine according to the present invention.
Explanatory drawing of the positional relationship after contact of a striker and a door holder in an example

FIG. 12 is an overall perspective view of a cab for a construction machine having a general sliding door.

FIG. 13 is a plan view illustrating a striker and a door holder in a conventional slide door.

[Explanation of symbols]

 C Cab D, 1 Slide door 1a Closed end of slide door O Door opening P, 9 Cab post H, 10, 21 Door holder 10a, 21a Receiving part 10b Stopper 10-1 Receiving member 10-2 Coil spring 10-3 Pin 10 -4 Attachment member 21d Flange for preventing galling M Receptacle S, 8 Striker 8b Contact part L Lock point α Entry angle β Lock angle 2, 22 Slide rail 2a, 22a Bend of slide rail 22b Bulge 3 Arm 4 Roller 5 Puller 6 Hold mechanism for sliding door 7 Frame 11, 12 bolts.

Claims (4)

[Claims] Claims: 1. A construction machine cab moves along an outer surface thereof.
In a sliding door that opens and closes a door opening, a striker is provided at a closed end of the door, and a cab post on the closed end side is provided with a door holder on which a receiving portion of the striker is opposed to the striker. A slide toe for construction machinery cabs. 2. A slide door which is guided by a slide rail provided along an outer surface of a construction machine cab and moves to open and close a door opening, wherein a striker is provided at a closed end of the door, and a striker is provided at the closed end side. Wherein the cab post is provided with a door holder on which a striker receiving portion is rotated so as to face the striker. 3. A slide toe for a cab of a construction machine according to claim 1, wherein a flange is formed in a receiving portion of said striker. 4. The cab post side of the slide rail,
3. A cab slide for a construction machine cab according to claim 2, wherein a bulge portion for moving a closed end side of the slide door inward of the cab is formed.