JPS59186757A - Truck type conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a transport vehicle guided by a guide rail is provided with a drive gear and a motor for driving this gear, and a rack gear that engages with the drive gear is provided on the travel path side of the vehicle. This relates to a trolley-type conveyance device, in which the driving gear is pressed toward the rack gear by a spring, and the meshing depth of both gears can always be kept constant, so that Another object of the present invention is to enable the drive gear and rack gear to engage smoothly and reliably, and to promote the i-carrying carriage favorably.

Hereinafter, one embodiment of the present invention will be described based on the attached illustrative drawings. In FIGS. Units 6 are attached to the lower four corners of the loading platform 4. 5,6
are a pair of left and right guide rails, which are located inside each unit 2, 5 in the transport vehicle 1, and guide wheels 7, which sandwich rail portions 5a, 6a extending inward from the lower end from above and below; 8 and a vertical axis roller 9 for steady rest, which is close to the inner end surface of the rail portions 5a, l)a, is pivotally supported by the guide rail winding portions 2a, 3a in each unit 2.6 of the transport vehicle 1. . Support members 10 support the pair of left and right guide rails 5 and 6 in a cantilevered manner at their upper ends, and are arranged at appropriate intervals in the length direction of the guide rails 5 and 6. Each unit 2. The guide rail windings 2a, i5a move between this support 10 and the guide rail 5.6. 11
is a cover plate installed between the upper ends of the pair of left and right guide rails 5 and 6.

A reduction gear 12 is mounted on a support section 2b connected inwardly from the lower end of the drive unit 2 of the transport vehicle 1, and as shown in FIGS. 3 to 5, the reduction gear 12 is Among the output shafts 12a and 12b that protrude on both left and right sides, a high-speed drive gear 16 is directly fixed to the output shaft 12a that protrudes outward, and a transmission gear 14 is directly fixed to the output shaft 12b that protrudes inward.
is fixed. These two output shafts 12a, 12b are
The motor 15 is driven by a motor 15 attached to the speed reducer 12 in the front-rear direction, and the motor 15 receives power from the power supply' and control signal transfer rail 16 supported on the guide rail support member 10 in multiple stages up and down to the support base section. It is driven by power and control signals applied via current collecting means 17 attached to the inner end of 2b.

Reference numeral 18 denotes a low-speed drive gear, which is pivotally supported at the tip of a swinging arm 21 that is pivotally supported to be vertically swingable around a support shaft 20 by a bearing member 19 mounted on the support base portion 2b. It engages with a small gear 22 pivotally supported by a support shaft 20.

26 is a large gear concentrically integrated with the small gear 22,
It meshes with the transmission gear=14. Therefore, transmission gear 1
4 is rotated through the large gear 2'5 and the small gear 22.
It is transmitted to the C low-speed drive gear 18 in a decelerated state.

25 is a compression coil spring that urges the swing arm 21 upward, and 26 is a stopper bolt that restricts the upper limit of the swing arm 21. The low-speed drive gear 18 is provided with an auxiliary wheel 2 having an outer diameter equal to the pinch circle diameter of the low-speed drive gear 18.
7 are installed concentrically.

Transport vehicle 1 constituted by the guide rails 5.6
As shown in FIGS. 3 and 6, a rack gear 28 that meshes with the high-speed drive gear 15 is installed on the horizontal path portion of the traveling path, and a first rack gear 28 is installed on the upward or downward inclined path portion. As shown in the drawings and FIG. 6, a rack gear 29 is installed, which engages the low-speed drive gear 18 in a state where it is slightly pressed down against the compression coil spring 25. The rack gear 28 is attached to the guide rail 5, and the rack gear 29 is attached to the guide rail support member 10. Reference numeral 30 denotes a flat guide rail arranged in parallel on one side of a rack gear 29 that meshes with the low-speed drive gear 18, and when the auxiliary wheels 27 contact and roll on the lower surface of this rail, the low-speed drive gear 18 and the rack gear 29 are connected to each other.
Maintain a constant depth of engagement.

According to the above configuration, when the transport vehicle 1 is on the horizontal path, the high-speed drive gear 1'6 driven by the motor 12 and the rack gear 28 engage, so that the transport vehicle 1 is moved along the guide rail 5, Drive at high speed while being guided by 6. When the carriage 1 is on the inclined path, the carriage 1 is moved along the kite rail 5. While being guided by 6, the vehicle will travel at low speed in the same direction.

Incidentally, the starting ends of both rank gears 28 and 29 are inclined as shown in the starting end of the rack gear 29 shown in FIG. 6 so that the meshing depth of the high-speed drive gear 15 and the low-speed drive gear 18 gradually becomes deeper. In particular, as shown in FIG. When biasing the rack gears 28 and 29 so that the
The start of engagement can be performed more reliably and smoothly.

Further, as shown in FIG. 6, after the high-speed drive gear 1i5 is disengaged from the rack gear 28 at the starting end position of the inclined path portion, until the low-speed drive gear 18 engages with the rack gear 29, the low-speed drive gear By providing a small section in which only the auxiliary wheels 27 that rotate together with the flat guide rail 50 contact the flat guide rail 50,
The traveling speed of the transport vehicle 1 after the transport vehicle 1 is disengaged from the rank gear 28 can be reduced while the low-speed rotating auxiliary wheels 27 roll against the flat guide rail i50 with scratches, and the low-speed drive gear 18 and rack gear 2
The occlusion with 9 can be performed smoothly without any pain.

As in the above embodiment, a trolley-type conveyance device is provided with a rack gear that engages with a drive gear pivotally supported on the conveyance vehicle on the traveling path side, and the conveyance vehicle is propelled by the rotation of the drive gear described in I. In this case, the rack gear that engages with the drive gear can be placed parallel to the carriage guide rail in the horizontal path section, but in some cases the drive gear must be pivoted at a position away from the carriage guide wheels. Therefore, if the position of the drive gear is fixed at the entrance/exit of the vertically inclined route section (the section that curves in the vertical direction), the distance between the movement locus of the gear and the carrier guide rail will not be constant. , determine the curved shape of the rack gear J
This makes it extremely difficult to achieve smooth engagement between the rank gear and the drive gear.

. However, according to the present invention, the drive gear (low-speed drive gear 18 in the embodiment) is movable in the direction of distance from and near the corresponding rack gear and is pressed toward the rack gear by a spring, so that the rack gear teeth,
As shown in Fig. 6, even at the entrances and exits of the above-mentioned inclined route portions, for example, the entrances and exits of the inclined route portions are simply arranged so as to maintain a substantially constant distance from the guide rails of the transport vehicle, but there are some variations in their positions. Also, the drive gear can be reliably and smoothly engaged with the rack gear. Therefore, manufacturing and installation of the rack gear becomes easy. In other words, the drive gear can be placed at any position.

On the other hand, when the drive gear is pressed toward the rack gear by a spring as described in item 2, the greater the pressing force, the more the drive gear will bite into the gear, which will cause both gears to operate normally. It becomes impossible to mesh. However, according to the present invention, an auxiliary wheel is provided in parallel with the drive gear, and the guy 1-rail is arranged in parallel with the drive gear, and the guy 1-rail restricts the engagement between the drive gear and the rack gear to a constant depth when the auxiliary wheel comes into contact with the drive gear. Since it is installed in parallel with the rack gear, even if the spring force that suppresses the drive gear against the rack gear is increased to obtain a strong propulsive force, the drive gear will not bite into the rack gear. This allows the meshing depth between both gears to be maintained at a normal level, allowing the transport vehicle to advance smoothly.

The above-mentioned J wheel can also be pivotally supported for relative rotation to a drive gear (low speed drive gear 18 in the embodiment).

In this case, the auxiliary wheel can have an arbitrary diameter with respect to the drive gear, but as shown in the embodiment, the auxiliary wheel is
When configured to rotate integrally with the drive gear with the same diameter as the notch diameter, the auxiliary wheel is connected to the guide rail (the flag of the embodiment) before the drive gear engages with the gear. y) Provide a section where the guide rail 60) is brought into contact with the conveyor truck traveling at a speed different from the circumferential speed of the drive gear, before the drive gear engages with the rack gear. By correcting the speed to be equal to or close to the circumferential speed of the gear, it is possible to smoothly start meshing the drive gear and the rank gear.

Incidentally, in the present invention, the high-speed drive gear 13 and the rack gear 28 meshing with the high-speed drive gear 13 shown in the embodiment are not essential.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view, Fig. 2 is a side view showing the drive unit 71 and the guide unit on one side, Fig. 3 is a longitudinal sectional front view of the main parts in the route section where the high-speed drive gear is used, and Fig. 4. Figure 5 is a cutaway view of the same part, Figure 6 is an explanatory diagram of the operation near the starting end position in the upward route, and Figure 7 is the rack gear starting end. FIG. 3 is a side view showing the specific structure of the position.

Claims (1)

[Claims] ■ A trolley-type conveyance device in which a drive gear and a motor for driving this gear are provided on a conveyance vehicle guided by a guide rail, and a rack gear that engages with the drive gear is disposed on the travel path side of the trolley. The driving gear is supported so as to be movable within a certain range in the direction of distance from and near the rank gear, is biased toward the corresponding gear by a spring, and is provided with a gear meshing depth regulating gear disposed in parallel with the rank gear. A trolley-type single-speed transport device comprising an auxiliary wheel that contacts a guide rail and is arranged concentrically with the drive gear. (2) The conveying device according to item 0, wherein the auxiliary wheel has the same diameter as the diameter of the drive gear and rotates integrally with the drive wheel.