JP2001354063A - Housing and fixing device for housing type cargo receiving table elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing and fixing device for a housing type cargo receiving table elevator, easy to operate, with superior operability, capable of surely fixing at a housing position, with excellent safety. SOLUTION: The housing type cargo receiving table elevator has the cargo receiving table 5 elevatably provided on a platform 1 via a link mechanism 4. The cargo receiving table 5 can be slid to a housing position under the platform 1. The elevator comprises a fixing member 71 provided on the side of the platform 1 for fixing the slide of the cargo receiving table 5 at the housing position and a canceling member 75 provided on the side of the cargo receiving table 5 or the platform 1 for canceling the fixing by the fixing member 71. The fixing member 71 fixes the slide of the cargo receiving plate in the state of being previously arranged at a fixing position with the sliding operation of the cargo receiving table 5 to the housing position, and it is displaced from the fixing position to the canceling position with operation of the canceling member 75 for fixing cancellation and displaced from the canceling position to the fixing position with the sliding operation of the cargo receiving table 5 from the storage position back to the platform 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a retractable loading / unloading device in which a loading platform provided on a loading platform via a link mechanism is slidable below the loading platform and can be stored. The present invention relates to a storage and securing device that secures a sliding operation of a receiving tray at the storage position when the storage device is disposed at the storage position.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a retractable loading tray elevating device has a mounting member b slidably provided along a slide rail c at a rear end of a vehicle frame a1 of a vehicle on which a loading platform a is mounted. And two upper links d1 on the mounting member b.
And a link mechanism d having a lower link d2 and a loading mechanism e.
Is placed at the working position behind the loading platform a, and is moved up and down between the ground and the floor surface of the loading platform a by the operation of the link mechanism d. At the end of the lifting operation, the loading platform a is folded down with the loading platform e folded. By sliding the mounting member b forward along the slide rail c from the rear, the entire mechanism including the load receiving table e is stored below the load table a.

The stored loading tray e is secured by a securing device f at this storage position, so that the entire mechanism does not inadvertently slide rearward due to vibration or the like when the vehicle travels.

More specifically, as shown in FIG. 6, a securing device f includes a hook g provided on a mounting member b and a lock pin h provided on the vehicle frame a1 side and capable of locking the hook g. Have. Therefore, when the mounting member b slides to the storage position, first, the tip of the hook g is locked by the lock pin h.
Then, the tip of the hook g moves over the lock pin h against the urging force of the spring i, so that the hook g is locked on the lock pin h. To secure the entire mechanism at the storage position.

An operation handle j is connected to the hook g. The operation handle j is rotated to release the hook g locked on the lock pin h against the urging force of the spring i. Thus, the securing of the mounting member b is released, and the entire mechanism can be slid backward from the storage position to the loading platform.

[0006]

However, in the above-mentioned conventional securing device f, securing at the storage position is performed by automatically locking the hook g to the lock pin h as the mounting member b slides. However, in order to release the securing, it is necessary to slide the attachment member b along the slide rail c while rotating the operation handle j. In other words, two operations, the sliding operation of the mounting member b and the turning operation of the operation handle j, must be performed simultaneously, and thus the operation is complicated and the operability is poor.

[0007]

According to the present invention, there is provided a storage and securing device in a retractable loading / unloading device of the present invention, wherein the loading / unloading platform is provided on a loading platform via a link mechanism having two upper and lower links and a lower link. A retractable loading / unloading device which is configured to be slidable to a storage position below the loading platform in a state where the loading platform is folded back and forth, wherein the loading platform is disposed at the storage position on the loading platform side. A securing member for securing the slide is provided, and a release member for releasing the securing by the securing member is provided on the receiving side or the loading side, and the securing member is moved to the storage position of the receiving side. Along with the slide operation, the slide of the load receiving tray is secured in a state where it is previously arranged at the securing position, and the securing member is released from the securing position to the release position by operating the release member. Furthermore the receiving platform of the storage location with the sliding movement of the loading platform rear those that are configured to be positioned lashing position from the release position.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

First, before describing the storage and securing device in the retractable loading and unloading device according to the present invention, the configuration of the retractable loading and unloading device provided with the storage and securing device will be described.

FIG. 1 shows the overall schematic structure of the retractable loading tray lifting device.

In FIG. 1, reference numeral 1 denotes a loading platform mounted on a vehicle frame 11 of the vehicle. A retractable loading platform lifting device 2 is provided below the rear end of the loading platform 1.

The retractable loading tray lifting device 2 includes a mounting member 3 provided on a vehicle frame 11 and a link mechanism 4 attached to the mounting member 3.
And a receiving table 5 provided through the intermediary.

An attachment member 3 is provided with an outward U-shaped slide rail 12 disposed at the rear end of the vehicle frame 11 in the front-rear direction.
Are provided so as to be slidable in the front-rear direction. More specifically, the front and rear rollers 31, 31 provided above the mounting member 3 are rotatably disposed in the slide rail 12, and the mounting member 3 is manually or appropriately moved by the slide rail. By sliding along the slide 12, the entire retractable loading / unloading device 2 can be moved back and forth below the floor of the loading platform 1.

As an example of the moving means, a chain 13 is provided below the slide rail 12.
2, the attachment member 3 is provided with a sprocket 32 that meshes with the chain 13 from below, and the sprocket 32 is rotated in a forward / reverse direction by a drive motor (not shown) via an appropriate transmission mechanism. , The mounting member 3 is moved back and forth. In addition, as the moving means, the mounting member 3 may be moved back and forth by using an actuator such as a cylinder or an operation handle in addition to the above-described configuration.

A drive shaft 6 is supported on the mounting member 3 substantially horizontally. A base end of a drive arm 61 is integrally fixed to the drive shaft 6, and a tip of a telescopic rod 62 a of a lift cylinder 62 provided on the mounting member 3 is connected to a tip of the drive arm 61.

The drive shaft 6 is integrally provided with a base end of a turning bracket 63, and a base end of a lift link 41, which will be described later, is pivotally supported at an intermediate portion of the turning bracket 63.

The link mechanism 4 includes a lift link 41 as a lower link and a connecting link 42 as an upper link.

The base end of the lift link 41 is pivotally supported by a pivot 41a at an intermediate portion of the rotating bracket 63.

A contact bolt 64 provided at the distal end of the rotating bracket 63 is configured to be able to contact the lower surface of the lift link 41 near the base end thereof. By contacting the base 41 at a position near the base end from below, the expansion / contraction operation of the lift cylinder 62 is transmitted to the lift link 41 as the rotation operation of the rotation bracket 63 via the drive arm 61 and the drive shaft 6. As a result, the lift link 41 rotates up and down.

The connecting link 42 has its base end pivotally supported by the mounting member 3 by a pivot 42a.

The slide rail 12, the mounting member 3, the link mechanism 4, and the drive shaft 6 are provided in a pair on each side of the vehicle frame 11. The left and right mounting members 3 synchronize the slide rail 12. It is connected by a connecting member 3a so as to slide.

The receiving table 5 comprises a distal member 51 and a proximal member 52. The distal member 51 and the proximal member 52 are connected to each other by an upper hinge 53. The upper surface of the end side member 52 is made to be able to be folded in two.

On both left and right sides of the base end of the base end member 52, the upper ends of the left and right connecting links 42 are pivotally supported by pivots 42b via brackets 54, and the lower ends of the left and right lift links are mounted below. The tip of 41 is pivotally supported by a pivot 41b.

The distal end of the distal end side member 51 is formed in a wedge shape, and when the loading table 5 reaches the ground, it tilts as shown by a dashed line in FIG. It is designed to be grounded.

The retractable loading / unloading device 2 is
By the operation of the moving means described above, the mounting member 3 is slid to the foremost end of the slide rail 12 in a state where the load receiving table 5 is folded and stored therein (see FIG. 2), and the mounting member 3 is moved to the slide rail 12. The loading table 5 slid to the rear end and folded into the distal end member 51 and the proximal end member 52.
Are unfolded horizontally, and the unfolded / folded position B (see FIG. 3) for folding the unfolded loading tray 5 and the mounting member 3 are slid to the middle position of the slide rail 12 and unfolded. Can be arranged at a lifting / lowering operation position (see FIG. 1) C where the lifting / lowering operation is performed between the ground and the floor of the loading platform 1.

The retractable loading / unloading device 2 configured as described above includes a storage and securing device 7 as a main part of the present invention for securing the retractable loading / unloading device 2 at the storage position A. Is provided.

As shown in FIG. 4, the storage and securing device 7 is provided on the vehicle frame (packing side) 11 and has a hook 71 as a securing member for securing the slide of the loading table 5 at the storage position A. The hook 7 is provided on the mounting member (load receiving side) 3.
1 and a release member 75 for releasing the securing by the lock 1.

The hook 71 is arranged near the front part of the connecting member 3a of the mounting member 3 arranged at the storage position A. Specifically, a bracket 14 fixed to the vehicle frame 11 is provided with a middle portion rotatably by a pivot pin 72, and a horizontal position as a securing position indicated by a solid line in FIG. It is rotatable between a vertical position as a release position indicated by a chain line.

A hook 71a is formed at one end of the hook 71 (the right end in a state where the hook 71 is arranged at a horizontal position indicated by a solid line in FIG. 4). The lock pin 3b fixed to the upper surface can be locked.

A spring 73 is connected between the bracket 71 and the one end of the hook 71. Accordingly, the hook 71 is held at the horizontal position where the other end abuts against the stopper 74 by the urging force of the spring 73 and the vertical position where the other end abuts the side surface of the connecting member 3a. Become.

That is, the biasing force of the spring 73 acts on the center line connecting both ends of the spring 73 with the center point of the pivot pin 72 as a dead point, and the biasing force of the spring 73 acts on the center line. Hold in horizontal and vertical positions. Specifically, when the hook 71 is arranged at the horizontal position, the center line connecting both ends of the spring 73 is located below the dead point, whereby the urging force of the spring 73 is reduced.
In a horizontal position, and
Is in the vertical position, the spring 73
Is located above the dead point, whereby the urging force of the spring 73 acts to hold the hook 71 in the vertical position.

Further, the hook 71 disposed at the vertical position
When the mounting member 3 is slid backward from the storage position A, the contact pin 33 provided on the mounting member 3
Abut from the front. Accordingly, when the contact pin 33 slides rearward and abuts on one end of the hook 71, the hook 71 is forcibly arranged from the vertical position to the horizontal position. In addition, this contact pin 3
For example, 3 may be used together with a pivot supporting the sprocket 32.

The release member 75 is provided with an operating arm 7 for forcibly rotating the hook 71 from a horizontal position to a vertical position.
6 and an operating handle 7 for operating the operating arm 76
8.

The operating arm 76 is disposed at an intermediate portion of the connecting member 3a facing the hook 71, and has a base end integrally formed with an inner end of an interlocking rod 76a rotatably supported by a bracket (not shown). It is provided in. A release pin 77 is provided at the distal end of the operation arm 76. The other end of the hook 71 in which the release pin 77 is disposed at the horizontal position in the storage position A by a rotation operation of an operation handle 78 described later. The hook 71 is forcibly rotated from the horizontal position to the vertical position by contacting the hook portion.

The operating handle 78 is provided integrally with the outer end of the interlocking rod 76a extending outside the mounting member 3 at its base end, and rotates the operating handle 78 downward in FIG. By operating, the hook 71 is forcibly rotated from the horizontal position to the vertical position by the release pin 77 of the operation arm 76 as described above.

The operating arm 76 and the connecting member 3a
A spring 79 is connected to the actuator and the operating arm 76 and the operating handle 78 are normally held at the positions indicated by solid lines in FIG. 4 by the urging force of the spring 79, and the operating handle 78 is rotated. At this time, the operating arm 76 rotates as described above against the urging force of the spring 79.

Next, the operation of the above-described retractable loading / unloading device will be described together with the operation of the storage and securing device 7.

First, as shown in FIG. 2, the retractable loading / unloading device 2 disposed at the storage position A has the hook 71 disposed at a horizontal position for locking the lock pin 3b. The slide of the attachment member 3 is secured by 71, and thereby the slide is stably held without being accidentally moved even by vibration during traveling.

When the loading / unloading operation of the load is performed by the storage-carrying-table lifting device 2, the operating handle 78 is turned downward to move the release pin 77 of the operating arm 76 to the other end of the hook 71. Then, the hook 71 is arranged from the horizontal position to the vertical position against the urging force of the spring 73. As a result, the locking of the lock pin 3b by the hook 71 is released, and the mounting member 3 is slidable forward along the slide rail 12. The operating handle 78 and the operating arm 76 are returned to their original positions by the urging force of the spring 79 when the operator releases his / her hand.

In this state, the mounting member 3 is connected to the slide rail 1.
By sliding from the front end to the rear end of the storage tray 2, the retractable loading tray elevating device 2 is arranged at the unfolded / folded position B shown in FIG. At this time, the hook 71 arranged at the vertical position moves the mounting member 3 to the storage position A.
With the operation of sliding the mounting member 3 forward from
When the contact pin 33 contacts from the front, the contact pin 33 is placed again from the vertical position to the horizontal position.

Subsequently, the distal end member 51 of the load receiving table 5 folded at the deployment / folding position B is rotated rearward so that the proximal end member 52 and the distal end member 51 are deployed horizontally. . Thereafter, the mounting member 3 is slid forward from the rear end of the slide rail 12 to be positioned at the lifting / lowering work position C shown in FIG. As a result, the loading tray 5 can be moved up and down between the ground and the floor of the loading platform 1 by the expansion and contraction operation of the lift cylinder 62. By this lifting / lowering operation, the load can be transferred between the ground and the loading platform 1 through the loading tray 5. Perform unloading work.

When the loading / unloading operation of the package is completed and the retractable loading / unloading device 2 is to be stored, the retractable loading / unloading device 2 is moved to the storage position A by the operation reverse to the above-mentioned operation.
To place. That is, the retractable loading / unloading device 2 is temporarily placed at the unfolding / folding position B from the lifting / lowering operation position C, and at this position, the distal end side member 51 of the loading tray 5 is folded, and the mounting member 5 is folded. 3 is slid from the rear end to the front end of the slide rail 12 to dispose the retractable loading table lifting device 2 at the storage position A.

At this time, when the mounting member 3 reaches the storage position A, first, the lock pin 3b comes into contact with one end of the hook 71, and the hook 71 rotates slightly upward while rotating the lock pin 3b.
b so that the retractable loading table lifting device 2 is stably held at the storage position A.

As described above, the hook 71 can be automatically arranged from the vertical position to the horizontal position in accordance with the sliding operation from the storage position A to the rear, and the hook 71 can be automatically moved in accordance with the sliding operation from the rear to the storage position A. Since the lock pin 3b can be automatically locked and secured, the operation of the storage and securing device 7 can be performed by the operation handle 78 with the hook 71.
It is only necessary to dispose from the horizontal position to the vertical position, the operation is easy and the operability is good, and furthermore, in the storage position A, the retractable loading tray elevating device 2 can be securely fastened and the safety is high.

Further, by deploying or folding the receiving platform 5 by disposing the retractable loading platform lifting / lowering device 2 at the deploying / folding position B, the entire receiving platform 5 is loaded with the loading platform 1 and the vehicle frame 1.
1 is pulled out to the rear of the loading tray 1 at this position even if the loading tray 5 is unfolded or folded.
In addition, the receiving table 5 does not interfere with the vehicle frame 11.

Although the present embodiment has been described with reference to the case in which the expansion / contraction operation of the lift cylinder 62 is transmitted to the lift link 41 serving as the lower link to rotate the lift cylinder 62 and thereby move the load receiver 5 up and down, the load receiver 5 is moved up and down. The lifting / lowering drive mechanism is not limited to this.
The drive may be carried by the two sides, and the drive source for rotating the lower link and the upper link is not limited to this.

In the present embodiment, the release member 75 is provided on the mounting member 3 on the cargo receiving table side. However, the release member 75 may be provided on the vehicle frame side.

[0048]

As described above, according to the storage and securing device in the retractable loading and unloading device of the present invention, the slide of the loading and receiving device can be automatically secured when the storage position is reached. By simply performing only the operation of placing the securing member from the securing position to the releasing position by the releasing member, the securing at the storage position can be released, and the operation is easy and the operability is good,
In addition, in the storage position, the retractable loading tray elevating device can be securely fastened, and the safety is high.

[Brief description of the drawings]

FIG. 1 is a side view showing a state in which a retractable loading tray elevating device is arranged at an elevating operation position.

FIG. 2 is a side view showing a state where the retractable loading tray elevating device is similarly arranged at a storage position.

FIG. 3 is a side view showing a state in which the retractable loading tray elevating device is similarly arranged at an unfolded / folded position.

FIG. 4 is an enlarged side view showing the configuration of a storage and lashing device in the retractable loading tray elevating device of the present invention.

FIG. 5 is a side view showing a conventional retractable loading tray elevating device.

FIG. 6 is a side view showing a securing device in the conventional retractable loading / unloading device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 loading platform 12 slide rail 2 retractable loading platform lifting device 3 mounting member 4 link mechanism 41 lift link (lower link) 42 connecting link (upper link) 5 loading platform 7 storage and securing device 71 hook (securing member) 75 release member A Storage position

Claims (1)

[Claims] A loading platform is provided on a loading platform via a link mechanism having upper and lower two upper links and a lower link so as to be able to move up and down, and the loading platform is folded back and forth and a storage position below the loading platform. A retractable loading / unloading device configured to be slidable and retractable, wherein a securing member for securing a slide of the loading cradle at the storage position is provided on the loading side, and the loading side or the loading side. A release member for releasing the lashing by the lashing member, and the lashing member slides on the loading cradle in a state where the lashing member is previously disposed at the lashing position with the sliding operation of the loading cradle to the storage position. And the release member is disposed from the securing position to the release position by operating the release member to release the securing. Storage lashing device in retractable receiving platform lifting device, characterized in that it is configured to be positioned from the position on the lashing position.