JPH0751407B2 - Gate-shaped carrier - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a portal transfer apparatus, and more particularly, to improvement of a power transmission mechanism of the portal transfer apparatus.

[Conventional technology]

2 to 4 show a conventional gate-shaped carrier,
In the figure, (1) is a drive unit side base, and a motor (2) is disposed inside the box-shaped drive unit side base (1) as shown in FIG. A drive pulley (3) is fitted to the rotatable output shaft (not shown) of 2).
(4) is an additional unit side base arranged in parallel to the drive unit side base (1), and the substrate (5) is placed inside the box-shaped pursuit unit side base (4), A pair of rods (6) are erected in parallel on the substrate (5). The pair of rods (6)
A bracket (8) rotatably supporting a rotatable follower pulley (7) is vertically pierced therethrough. Then, the spring (9) and the nut (10) are fitted or screwed into the pair of rods (6), respectively. The function of the spring (9) will be described later.

Further, (11) is a gate-shaped frame which is bridged between the drive unit side base (1) and the chasing unit side base (4), and a fourth frame is provided in an upper part of the frame (11). As shown in the figure, a plurality of rollable guide rollers (12) are arranged in two rows, and a guide groove along the frame (11) is provided on the front surface of the frame (11) as shown in FIG. A hole (13) is provided. (14)
Is an endless wire rope (transmission body) supported by a guide roller (12) in the frame. This wire rope (14)
As shown in FIG. 4, both ends of are wound around the drive pulley (3) of the motor (2) and the follow-up pulley (7) of the bracket (8), respectively, to rotate the drive pulley (3). Along with this, the guide roller (12) is guided to move circularly. The above-mentioned spring (9) exerts an action of elastically biasing the bracket (8) supported by the wire lobe (14) downward to tension the wire rope (14) and maintain the tension.

However, (15) is a carrier, and this carrier (15) is
A moving part (not shown) movably arranged in the frame (11) and locked to a part of the wire rope (14), and the moving part is attached to the moving part and penetrates the guide groove hole (13). And a mounting portion (15b) (see FIG. 3) protruding outwards and a mounting portion (15b) swingably supported by the projecting end of the supporting portion (15a) to support a work (not shown). The wire rope (14) moves along with the rotation of the drive pulley (3) to move along the frame (11), in other words, along the guide groove (13) to carry the mounted work. When the carrier (15) moves upward-horizontally-downward, the mounting portion (15b) swings and is always maintained in a horizontal state, which serves to prevent the mounted work from falling.

Therefore, the carrier (15) provided with the work moves upward-horizontally-downward along the guide groove hole (13) by the movement of the wire rope (14) accompanying the rotation of the drive pulley (3).

By the way, the power transmission mechanism of the conventional gate-shaped carrier is a motor (2) provided with a drive pulley (3) and a follower pulley (7).
And a wire rope (14) which is a transmission body, and the transmission of power is carried out by the frictional force between the drive pulley (3) and the follower pulley (7) and the wire rope (14). It was generated by the tension of the wire rope (14). In order to reliably transmit the power by the frictional force, it is necessary to tension the wire rope (14) to increase the tension. Then, the wire rope (1
There was a problem that the burden of 4) became heavy and it could not be used for a long time. Further, since the life of the wire rope (14) is not ensured, it is necessary to dispose the guide roller (12) having a size several tens of times larger than that of the wire system in the curved portion of the upper portion of the frame (11) where the load increases. As a result, the radius of the curved portion of the frame had to be increased, and the frame (11) could not be downsized (FIG. 4).

As a prior art document of this type, there is JP-A-62-116407.

[Problems to be Solved by the Invention]

The conventional gantry carrier is configured as described above, and it is necessary to tension the wire rope (14) to make the tension very large in order to reliably transmit the power by frictional force. However, there is a problem in that it cannot be used for a long period of time due to the large burden of (). Furthermore, it was necessary to secure the life of the wire rope (14) by disposing a guide roller (12) having a size of several tens of times the wire diameter in the upper curved portion of the frame (11). Since R becomes large, the frame (11) cannot be made compact (see FIG. 4).

The present invention has been made in view of the above points, and an object of the present invention is to provide a gate-shaped transfer device capable of long-term use of a transmission and miniaturization of a frame.

[Means for Solving the Problems]

In the present invention, in order to achieve the above object, a drive unit side base having a rotatable drive pulley incorporated therein, and a follower drive having a rotatable drive pulley arranged opposite to the drive unit side base. A part-side base, a gate-shaped frame that is bridged between the follower-side base and the drive-side base, and is arranged inside the frame and wound around the drive pulley and the follower pulley. The carrier includes an endless transmission member, and a swingable carrier that penetrates the guide groove of the frame and is locked to a part of the transmission member and moves along the frame as the transmission member moves. In which the workpiece is mounted and conveyed, teeth are formed on the peripheral surface of the drive pulley and the follower pulley, and the transmission member wound around the drive pulley and the follower pulley is a toothed belt, A small diameter guide that supports this toothed belt. It is characterized in that a plurality arranged rollably in said frame Dorora.

[Action]

According to the present invention, teeth are engraved on the peripheral surfaces of the drive pulley and the follower pulley, and the transmission member wound around the drive pulley and the follower pulley is composed of a toothed belt, and the toothed belt is guided and supported. Since a plurality of small-diameter guide rollers are rotatably arranged in the frame, the transmission can be used for a long period of time and the frame can be downsized.

〔Example〕

Hereinafter, the present invention will be described in detail based on an embodiment shown in FIG. 1. In the figure, (16) is an output shaft (not shown) of a motor (2).
The drive pulley fitted to the drive pulley (16) is provided with meshing teeth on the peripheral surface portion unlike the conventional example. (17)
Is a rotatable follower pulley pivotally supported by the bracket (8), and meshing teeth are formed on the peripheral surface of the follower pulley (17).

(18) is a plurality of rolling guide rollers arranged in two rows in the upper part of the frame (11).
Is a guide roller (18A) provided on the outer peripheral side of the upper part of the frame and provided with meshing teeth on its peripheral surface part, and a guide roller (18A) arranged on the inner peripheral side of the upper part of the frame and having a smaller diameter than the guide roller (18A). Consisting of a toothless guide roller (18B),
Both of these guide rollers (18A) and (18B) have a smaller diameter than the conventional guide roller (12).

Thus, (19) is an endless toothed belt supported by the guide roller (18), and both ends of the toothed belt (19) have the drive pulley (16) and the follower pulley (17) described above. Each of them is wound around and is guided by a guide roller (18) to rotate in accordance with the rotation of the drive pulley (16). The drive pulley (16) and the follower pulley (1
7) and the overlapping surface of the guide roller (18A) that overlaps with the peripheral surface of the guide roller (18A) are formed with meshing teeth that mesh with each other. The other parts are the same as the conventional example.

As described above, according to the present invention, the transmission of power is a toothed belt transmission, in other words, the drive pulley (16) and the follower pulley (17).
And the meshing teeth of the guide roller (18A) and the toothed belt (1
The toothed belt (19) prevents slippage and speed changes by engaging with the meshing teeth in 9) and transmitting.
The tension of the tooth belt can be reduced and the toothed belt can be used for a long time. Further, according to the present invention, since it is not necessary to configure the guide roller to have a large diameter to secure the life of the toothed belt (19), the radius R of the curved portion at the upper part of the frame is reduced to make the frame (11) compact. Can be configured. Further, according to the present invention, since the power is transmitted by the transmission of the toothed belt, it can be expected that the conveying device and the like can be downsized and reduced in weight, and that noise due to rotation can be suppressed and eliminated.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a gate-shaped transfer device capable of achieving long-term use of the transmission body and downsizing of the frame.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a gate-shaped carrier according to the present invention, FIG. 2 is a front view showing a conventional gate-shaped carrier, and FIG.
The drawing is a plan view of FIG. 2, and FIG. 4 is a view corresponding to FIG. 1 showing a conventional gate-shaped carrier. In the figure, (1) is a drive side base, (3) and (16) are drive pulleys, (4) is a follower side base, (7) and (17) are driven pulleys, and (11) is Frame, (12) and (18) are guide rollers, (13) is guide slot, (14) is wire rope, (1
5) is a carrier and (19) is a toothed belt. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A drive unit side base having a rotatable drive pulley built-in, a chasing unit side base arranged opposite to the drive unit side base having a rotatable drive pulley, and A gate-shaped frame that is bridged between the follower-side base and the drive-side base, and an endless transmission member that is arranged in the frame and wound around the drive pulley and the follower pulley. And a swingable carrier that penetrates through the guide groove of the frame and is locked to a part of the transmission member and moves along the frame as the transmission member moves. In the door-shaped carrier, the teeth are formed on the peripheral surfaces of the drive pulley and the follower pulley, and the transmission member wound around the drive pulley and the follower pulley is a toothed belt. A guide roller with a small diameter that guides and supports Portal conveying apparatus characterized by a plurality disposed rollably within.