JPH0114538Y2 - - Google Patents

Description

[Detailed description of the invention] This invention supports the center position in the width direction at two locations in the front and back of the load support platform by a pair of front and rear trolleys that are movably supported between a pair of opposing U-shaped guide rails. The present invention relates to a conveyance device.

The biggest problem with this type of conveyance device is that the load support platform is unstable in the lateral direction. In conventional conveying devices of this kind, in order to prevent the load support from rolling, a steady rest guide is used to support a horizontal shaft roller for a steady rest that is pivotally supported near the widthwise end of the load support. Although the rails were constructed separately from the trolley running guide rails, the present invention provides a conveyance device that can achieve the intended purpose without using the above-mentioned guide rails dedicated to resting the load support platform. This is what I am trying to do.

Hereinafter, one embodiment of the present invention will be described based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a load support platform, and 2 and 3 are at both front and rear ends of the load support platform 1. A front trolley and a rear trolley support the center position in the width direction, 4 is a leading trolley, 5 is a rear end trolley, and 6a and 6b are a pair of left and right opposing U-shaped guide rails that movably support each of the trolleys 2 to 5. be. Each of the trolleys 2 to 5 has a pair of left and right wheels 7 and a pair of front and rear wheels 7 that fit on the guide rails 6a and 6b, and a pair of front and rear wheels that fit between the lower opposing edges of the guide rails 6a and 6b. The pair of front and rear trolleys 2 and 3 that support the load support platform 1 are provided with a pair of front and rear trolleys 2 and 3 that fit between the lower opposing edges of the guide rails 6a and 6b. A vertical axis roller 9 for steady rest is provided. The front and rear trolleys 2 and the leading trolley 4 are:
Connecting rod 1 with universal joints 10a and 10b at both ends
1, and the rear trolley 3 and rear end trolley 5 are connected to each other by universal joints 12a and 1 at both ends.
They are connected to each other by a connecting rod 13 having 2b.

Further, the pair of front and rear trolleys 2 and 3 that support the load support platform 1 are provided with rotating bodies 15 that are rotatable around vertical shafts 14 that protrude from these trolleys 2 and 3. A pair of pins 16 are provided concentrically protruding from both left and right sides. A pair of bearing plates 17 that sandwich the rotary body 15 are protruded from both front and rear ends of the load support platform 1, and the pair of bearing plates 17
slits 18 formed upward from the lower sides of the
Both front and rear ends of the load support platform 1 are supported by the trolleys 2 and 3 by fitting the pins 16 into the trolleys 2 and 3. Therefore, the load support platform 1 has both front and rear trolleys 2 and 3.
In contrast, they are vertically swingable around pins 16, and horizontally swingable together with rotary body 15 around vertical axis 14.

Reference numeral 19 denotes a driven claw pivotally supported on the lower part of the leading trolley 4 so as to be able to freely swing up and down; 20, a drive trolley equipped with a pusher 21 that engages with the driven claw 19 to propel the leading trolley 4; and 22, the driving trolley. A pair of left and right opposing U-shaped guide rails movably support the trolley 20, 23 is a drive chain that propels the drive trolley 20, and 24 is an operating piece protruding rearward from the lower part of the rear end trolley 5 for stopping the following trolley. be. Incidentally, the driven pawl 19 may be of a fixed type and the pusher 21 may be of a vertically movable type.

In the above-mentioned conveyance device, the present invention provides roller support members 25 and 26 that are connected to the left and right sides of the pair of front and rear trolleys 2 and 3 that support the load support platform 1 from above the guide rails 6a and 6b. , the guide rail 6 is attached to the roller support members 25 and 26.
The horizontal shaft rollers 27 and 28 for steady rest are pivotally supported at a height that slightly floats above the upper surfaces of the rollers a and 6b.

In the conveying device configured as described above, the pusher 21 of the drive trolley 20 engages with the driven pawl 19 of the leading trolley 4 as shown in the figure, so that the four trolleys 2 to 5 and the load support platform 1 A transport carriage consisting of the following is made to travel along guide rails 6a and 6b. Universal joints 10a, 10b and 12a, 12b are provided at both ends of the connecting rods 11, 13.
is interposed, the load support 1 can be rotated about the vertical axis 14 relative to the trolleys 2, 3, and the load support 1 can be rotated around the pin 16 relative to the trolleys 2, 3. By being able to swing up and down, the carrier can smoothly travel on horizontal curved paths and vertical curved paths. In this way, the conveyance work is carried out by supporting the conveyed object on the load support platform 1 of the conveyance vehicle that can travel along a fixed route. Normally, a pair of front and rear and a pair of upper and lower vertical shaft rollers 8 and 9 for steady rests, which are pivotally supported by trolleys 2 and 3 that support the front and rear of the load support platform 1, are mounted on the upper and lower sides of a pair of left and right guide rails 6a and 6b. This is prevented by fitting between the opposing side edges on both sides. If the load support platform 1 is shaken significantly beyond the permissible range during transport, the pair of left and right horizontal shaft rollers for steady rest, which are pivotally supported by the trolleys 2 and 3, should be removed. By bringing one of the guide rails 6a, 6b into contact with the upper surface of one of the guide rails 6a, 6b, the load support platform 1 is prevented from swinging unreasonably.

By separating the driven pawl 19, which can swing up and down, from the pusher 21 using a stopper that can move in and out, it is possible to stop only the transport vehicle without stopping the drive trolley 20, and to operate the rear end trolley 5. By the action of the piece 24 and the driven pawl 19 of the leading trolley 4, it is possible to automatically stop and store the following conveyance carriage, as is well known in the art.

In the above embodiment, the horizontal axis roller 2 for steady rest
Roller support members 25 and 26 that pivotally support 7 and 28
are connected to the trolleys 2 and 3, but near both front and rear ends of the load support platform 1 (for example, a lateral extension member 1 equipped with load support attachments 1a and 1b at both ends)
c, 1d or near both ends of the main frame 1e in the front-rear direction). In addition, as shown in FIG. 3, when a U-shaped support member 29 that opens laterally is interposed between the trolleys 2, 3 and the vertical shaft 14, the U-shaped support member 29 has a horizontal support member 29 for steady rest. The shaft rollers 27 and 28 can be supported pivotally.

Furthermore, the horizontal axis roller 27 or 28 for steadying may be pivotally supported on only one of the trolleys 2 and 3 that support the front and rear of the load support platform 1. In addition, horizontal shaft rollers 27, 2 for steadying are provided on the load support platform 1 side.
8, the roller may be supported only on one of the front and rear ends of the load support platform 1, or it may be supported at an intermediate position.

The conveyance device of the present invention can be implemented and used as described above, and is carried at two locations, front and rear of the load support platform, by a pair of front and rear trolleys movably supported between a pair of opposing U-shaped guide rails. In the conveying device, a horizontal axis roller located above each of the upper surfaces of the pair of guide rails is mounted on at least one of the pair of front and rear trolleys or on the load support platform. and these horizontal axis rollers are pivoted at a height that slightly floats above the upper surface of the guide rail when the load support platform is in a horizontal position.
Only when the load support platform 1 is in a situation where it is abnormally swaying, the horizontal axis roller is brought into contact with the upper surface of the pair of guide rails for running the trolley to prevent the load support platform from lateral shaking; Normally, the horizontal axis roller is floated above the guide rail, allowing the load support platform to run smoothly without providing any extra resistance. Moreover, there is no need to separately install a dedicated guide rail to prevent the load support platform from rolling in cooperation with the horizontal axis roller, which is economical, and the floor surface can be effectively used even during the trolley travel path. It is.

In the embodiment, by lifting the load support stand 1 upward, the bearing plate 17 can be detached from the pin 16 on the trolleys 2 and 3 side, and the load support stand 1 can be removed from the trolleys 2 and 3. Instead of the open slit 18, an elongated hole with closed upper and lower ends may be used. In this case, the bearing plate 17 may be detachably attached to the load support 1 side.

[Brief explanation of the drawing]

Fig. 1 is a side view with the front half of the trolley running guide rail omitted; Fig. 2 is a longitudinal sectional front view with the drive trolley and drive chain omitted;
FIG. 3 is a longitudinal sectional front view showing a modified example. DESCRIPTION OF SYMBOLS 1... Load support platform, 2, 3... Trolley for supporting the load support platform, 4... Leading trolley, 5... Rear end trolley, 6a, 6b... A pair of opposing U-shaped guide rails for running the trolley, 7 ...Horizontal axis wheels, 8, 9...
...Vertical axis roller for steady rest, 10a, 10b,
12a, 12b... Universal joint, 11, 13... Connecting rod, 14... Vertical shaft, 15... Rotating body, 16...
...Pin, 17...Bearing plate, 18...Slit, 1
9... Driven claw, 20... Drive trolley, 21...
Pusher, 22...Guide rail for supporting the driving trolley, 24...Operation piece for stopping the following trolley, 2
5, 26...Roller support member, 27, 28...
Horizontal axis roller for steady rest.

Claims (1)

[Scope of utility model registration request] In a conveyance device in which a pair of front and rear trolleys movably supported between a pair of opposing U-shaped guide rails support the center position in the width direction at two locations in the front and rear of a load support platform, At least one of the trolleys or the load support is provided with horizontal axis rollers located above each of the upper surfaces of the pair of guide rails, and these horizontal axis rollers are configured to move when the load support is in a horizontal position. A conveying device that is pivotally supported at a height that slightly floats above the upper surface of the guide rail.