JPH0110293Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an asynchronous transport device equipped with a transport carriage that moves along a guide rail. More specifically, a driving means such as a chain that moves along this path is provided on the side of the carriage moving route, and a toothed wheel that engages with the driving means is pivotally supported on the side of the transporting carriage, and a braking means is provided on the side of the carriage. In the trolley-type asynchronous conveyance device, the carriage is moved forward together with the driving means by fixing the gear, and the carriage is stopped by releasing the braking action of the braking means. It is an object of the present invention to enable the forward drive of the transport vehicle to be performed strongly and reliably when the gears are braked, and at the same time to enable the stopping operation of the transport vehicle to be performed smoothly and reliably when the brake is released. .

Hereinafter, one embodiment of the present invention will be explained based on the attached illustrative drawings. In Fig. 1, 1 is a guide rail constructed along a horizontal circulation path, and 2 is movably supported on the guide rail 1. 3 is a drive chain for moving the transport vehicle 2 forward (means for driving this drive chain 3 is not shown);
4 is a transport vehicle stopping means.

As shown in FIGS. 2 and 3, the guide rail 1 has an upper guide rail portion 1a and a lower guide rail portion 1b connected and integrated by a vertical wall portion 1c. includes a loading platform 2a located on one side of the guide rail 1 at substantially the same level as the lower guide rail 1b, and a vertical wall 2b adjacent to the guide rail 1. The drive chain 3 includes a vertical shaft roller 3a supported at both upper and lower ends of the link connecting pin, and a supporting horizontal shaft roller 3b pivotally supported by the lower link, and is located directly above the lower guide rail portion of the guide rail 1. By loosely fitting the rollers 3a and 3b into the chain guide rail parts 5a and 5b integrally formed at the position,
It is supported to move along a fixed path. 6
are mounting screws that are respectively engaged with upper and lower engagement grooves 7 that are integrally formed on the back side of the guide rail vertical wall 1c. ) is attached to the guide rail 1.

As shown in FIGS. 3 and 4, the transport vehicle 2 includes an upper guide rail portion 1a of the guide rail 1.
A pair of front and rear horizontal axis rollers 8 to ride on, a pair of front and rear vertical axis rollers 9 that come into contact with the back side of the upper guide rail section 1a, a pair of front and rear vertical axis rollers 10 that come into contact with the front side of the lower guide rail section 1b, and the rollers. It is movably supported by the guide rail 1 via a vertical shaft roller 11 that abuts on the back side of the lower guide rail portion 1b at a position corresponding to 10.

Reference numeral 12 denotes a sprocket wheel that meshes with the drive chain 3, and a vertical rotation shaft 14 supported via a bearing 13 on the back side of the vertical wall portion 2b of the conveyor cart.
is fixed. Reference numeral 15 denotes a vertically movable cone clutch type braking means, and as shown in FIG. The movable brake body 16b is fitted into the cone-shaped brake body 16a and loosely fits into the cone-shaped brake body 16a so as to be able to come into contact with and separate from the cone-shaped body.

17 is an operation means for releasing the brake from the cone clutch type braking means 15, which includes a pair of brake release levers 18, a vertical operation lever 22 extending forward, and a link mechanism 28 for interlocking both levers 18, 22. , and a sub roller 38 pivotally supported on the side adjacent to the guide rail 1 at an intermediate position of the operating lever 22. The brake release lever 18 is attached to a horizontal support shaft 18 as shown in FIG.
a is pivotally supported on the back side of the vertical wall portion 2b of the conveyance vehicle so as to be able to swing up and down, and its free end sandwiches the parallel flat side surface portion 19 formed on the movable brake body 16b, and also connects these side surfaces. A pair of pins 20 protruding from the portion 19 are engaged with each other through elongated holes 21 .
Therefore, rotation of the movable brake body 16b is prevented by this lever 18. The vertically movable operating lever 22 is pivotally supported by a horizontal support shaft 23 on the back side of the vertical wall portion 2b of the transport vehicle so as to be able to freely swing vertically. On the opposite side, a cam driven roller 25 rotatable around a horizontal support shaft 24 and a brake spring 26 (see FIG. 3) that apply an appropriate rotational resistance force to this roller 25 are provided. The braking force of this brake spring 26 can be adjusted with an adjusting nut 27. The link mechanism 28 includes a link 29a that integrally extends upward from the operating lever 22, and this link 29a.
a link 29b connecting the tip of a and the middle part of the brake release lever 18, and connecting pins 30a, 3
0b. 31 is braking means 1
The brake release lever 1 is a spring that biases the brake release lever 1 to a braking state through a spring receiving seat 33 that is housed in a fixed bracket 32 and that can be raised and lowered.
The position of the link connecting pin 30b of No. 8 is pressed downward, and the pressing force can be adjusted by the adjustment screw 34.

Reference numeral 35 is a cam for stopping a subsequent conveyance vehicle attached to the rear side of the vertical wall portion 2b of the conveyance vehicle in a state of extending rearward, and as shown by the imaginary line in FIG. The operation lever 22 of the transport vehicle is provided at a position where it can be moved upward via a roller 25 at its tip, and a stopper 37 is attached to the end thereof to abut against the contact surface 36 of the following transport vehicle. There is.

Reference numeral 39 is a cam rail for moving the operating lever 22 upward via the sub-roller 38, as shown by the imaginary line in FIG. It is attached to the cam rail attachment part 40 of the guide rail 1. Transport vehicle stopping means 4 shown in FIG.
As shown by the imaginary line in FIG. 4, the cam 41, which is the same as the cam 35 for stopping the subsequent transport vehicle, is placed in the active position (the passing position of the cam 35 for stopping the subsequent transport vehicle) and in the non-operative position, which allows the transport vehicle 2 to pass. The cam 41 is configured to be movable between positions, and the position switching of this cam 41 is performed manually or automatically.

Next, the method of use and operation will be explained. Normally, as shown in FIG. 4, the movable braking body 16b of the braking means 15 is biased downward by the biasing force of the spring 31, and the movable braking body 16b is tightly pressed against the cone-shaped braked body 16a. By fitting, the sprocket wheel 12 is fixed so as not to rotate. Therefore, as the drive chain 3 moves in the transport vehicle forward direction 42, the sprocket wheel 12 engages with the drive chain 3.
Each carriage 2 equipped with a drive chain 3 moves in the forward direction 42 along the guide rail 1 together with the drive chain 3.

When stopping the approaching transport vehicle 2 at a predetermined stop position, the cam 41 of the stopping means 4 disposed at the stop position is moved from the non-operating position shown by the imaginary line in FIG. 4 for stopping the following transport vehicle. By manually or automatically switching to the operating position where the cam 35 passes, the carrier 2 approaches this stop position.
The operating lever 22 is moved upward around the horizontal support shaft 23 by the roller 25 riding on the cam 41. As a result, the brake release lever 18 is pushed upward around the horizontal support shaft 18a via the links 29a and 29b, and the movable brake body 16b of the brake means 15 resists the biasing force of the spring 31 and moves to the fifth position.
It is raised as shown in the figure, and the tight fit with the cone-shaped braked body 16a is released. That is, the braking means 15
The brake is released and the sprocket wheel 1
2 is in a state where it is free to rotate, so it rotates as the drive chain 3 moves, and the carriage 2 becomes free. The carriage 2, now free, stops at a predetermined position due to the contact between the stopper 43 provided at the tip of the cam 41 and the front end contact surface 36.
A transport vehicle fixed position locking means for locking the transport vehicle 2 at a predetermined position may also be used.

After the load transfer work between the stopped transport vehicle 2 and the loading platform 2a or various operations on the workpieces on the loading platform 2a is completed, the cam 41 of the stopping means 4 is retracted to the non-operating position and the cam 41 is not operated. By making the lever 22 movable downward and allowing the transport vehicle 2 to move forward, the braking means 15 automatically brakes the sprocket wheel 12 by the biasing force of the spring 31. The carriage 2 starts moving forward together with the drive chain 3. While the transport vehicle 2 is stopped at the stop position as described above, when the following transport vehicle 2 approaches the position where it collides with the stopped transport vehicle 2, the following transport vehicle 2 is stopped as shown by the imaginary line in FIG. 2 operation lever 2
2 is moved upward by the cam 35 for stopping the subsequent conveyance vehicle 2 in the same way as when the cam 41 of the stop means 4 moves upward, and therefore, as described above, the subsequent conveyance vehicle 2 The braking means 15 of the cam 3 is switched to a brake release state, and the following conveyance vehicle 2 automatically becomes free, and the cam 3
It will stop with the contact surface 36 in contact with the rear end stopper 37 of No. 5. In this way, the carriages 2 can be automatically stored one after another starting from the position of the stop means 4.

In addition, in the section where the cam rail 39 is provided in the horizontal circulation path of the transport vehicle 2, the sub roller 38 of the operating means 17 rides on the cam rail 39, so that the operating lever 22 moves upward, and the sprocket The braking action of the braking means 15 on the wheel 12 is released in the same way as when it is released by the cam 35 or 41, and the carrier 2 becomes free. Moreover, the sub roller 38 is the cam rail 3
Sprocket wheel 1 as long as it is on 9
Since the brake applied to the carriage 2 remains released, the brake on the carriage 2 remains released within the section where the cam rail 39 is located.
It can be moved freely by hand operation.

In addition, as shown in FIG. 6, the conveyance carriage 2 has an appropriate structure at a place where the drive chain 3 detours to pass through a drive means or between two drive chains 3 driven by another drive means. feeder 44
(For example, a feeder configured to move the pusher 45 for backing the transport vehicle by the drive chain 46, etc.) will move it forward to the position where the sprocket wheel 12 engages with the drive chain 3 on the lower side. In order to smoothly engage the sprocket wheel 12 with the drive chain 3 on the side, the drive chain 3 is tilted by the two guide wheels 47 and 48, and the depth of engagement between the sprocket wheel 12 and the drive chain 3 is adjusted. gradually increases, and the guide wheel 4 on the lower side
8 is pivotally supported on a movable frame 50 that can move backward against a spring 49, as shown in FIGS. Even when they are in a mating state, it is preferable that the drive chain 3 is configured to be able to move backward together with the guide wheel 48 until the two are properly engaged. Note that the guide wheel 48 is connected to the sprocket wheel 12 as shown in the figure.
It is preferable to be configured so as to abut the link or guide roller 3a of the drive chain 3 on both sides of the circumferential groove 48a so as not to interfere with the engagement between the drive chain 3 and the drive chain 3.

The loading platform portion 2a of the transport vehicle 2 may have a structure depending on the purpose of use. FIG. 9 shows a loading platform section in which a loading platform 2a is provided with a load receiving platform 52 that can be tilted around a horizontal support shaft 51 so that it can be used as a transport vehicle for sorting work, and a cam driven roller 53 is pivotally supported on the loading platform 52. It shows the structure. When using this carrier, when the carrier 2 is stopped by the stopping means 4, a pusher is raised and lowered by a cylinder/piston unit or the like to a position directly below the cam driven roller 53. 54 is arranged, and by the upward movement of the pusher 54, the load receiving platform 52 of the stopped transport vehicle 3 is pushed up and tilted as shown by the imaginary line, and the loaded load slides laterally. By configuring it so that it can be dropped, sorting work can be performed. Of course, a large number of freely rotatable rollers 52a can be arranged in parallel on the cargo receiving platform 52 to facilitate the sliding of the cargo.

The horizontal circulation trolley-type transport device of the present invention can be implemented and used as described above, and the transporter movably supported on the guide rail is equipped with a toothed wheel (implemented) rotatable about a vertical axis. The example includes a sprocket wheel 12), a vertically movable cone clutch type braking means for switching the toothed wheel between a fixed state and a rotatable state, and a spring that biases this braking means into a braking state and fixes the toothed wheel. , an operating lever that extends forward and is movable up and down, and interlocking means (in the embodiment, a link mechanism 28
and a brake release lever 18), and a trailing truck stopping cam that moves the operating lever of the trailing truck upward when the trailing truck approaches. A drive means such as a chain that moves along the guide rail (in the embodiment, it is the drive chain 3, but a timing belt or the like may also be used), and a transport vehicle stopping means that performs the same function as the following vehicle stopping cam are provided. Therefore, it is possible to asynchronously advance and stop each of the plurality of transport vehicles belonging to a common movement route, and to conveniently utilize it as a highly flexible transport device. In particular, even when the conveyor truck is supported in a cantilevered manner on one side of the guide rail as in the embodiment, by combining the vertically movable cone clutch type braking means and the vertically movable operating lever, the vertically movable cone clutch is The space where the brake means, vertical movement control lever, etc. are arranged, that is, the space between the transport vehicle and the guide rail, is configured to be narrow, and the extension of the transport vehicle relative to the guide rail is reduced to improve strength. obtain.

By using the vertically movable cone clutch type braking means, the fixed frictional force of the gears can be greatly increased compared to the strength of the spring that biases the braking state, and even a highly loaded conveyance vehicle can be powerfully and reliably propelled. At the same time, it is easy to smoothly switch from the gear brake state to the brake release state, or vice versa, via the half-clutch state, and to smoothly and safely start and stop the transport vehicle.

Furthermore, the cone clutch type braking means as described above requires a very large disconnection force when separating from the braked state to the brake released state, but by moving the operating lever upward, the braking means can be changed to the brake released state. When the control lever is moved upward by the cam, the upward force that acts on the transport vehicle is absorbed by the transport vehicle's own weight and load, and the operation is performed as the transport vehicle moves forward. It is possible to reliably move the lever upward and reliably switch the braking means to the brake release state. Moreover, during this switching action, the carrier does not make any unnecessary movements in the left-right and lateral directions.

As a result, it has become possible to obtain extremely useful effects in practical terms.

In addition, when a braking means is used to apply an appropriate braking force to the cam driven roller 25 pivotally supported on the operating lever 22 as in the embodiment, an appropriate braking force is applied to the rolling of the roller 25 on the cam 35 or 41. Since a strong resistance force is applied, the stopped transport vehicle is difficult to move back and forth, and the transport vehicle can be stably stopped. In particular, a one-way clutch type braking means is provided on the roller 25 that allows the roller 25 to rotate only in the forward direction and prevents the roller 25 from rotating in the backward direction.
5 and the horizontal support shaft 24 fixed to the operating lever 22, the abutment surface 36 is inserted into the stopper 37.
Alternatively, it is possible to more reliably prevent the carriage 2 from moving backward due to reaction from the state in which it is in contact with 43.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of the entire structure, Fig. 2 is a perspective view showing the guide rail and carrier, Fig. 3 is a vertical side view of the main part, Fig. 4 is a longitudinal cross-sectional rear view of the main part, and Fig. 5 6 is an enlarged vertical cross-sectional view showing the vicinity of the cone clutch type braking means, FIG. 6 is a schematic plan view showing the transfer point of the transport vehicle between the drive chains, FIG. 7 is an enlarged plan view of the main parts, and FIG. 8 is the same view. FIG. 9 is a vertical side view showing a modification of the carrier platform. 1...Guide rail, 2...Transportation cart, 3...
Drive chain (driving means), 4...stopping means, 12
...Sprocket wheel (gear), 15...Vertical movable cone clutch type braking means, 16a...Cone shaped braked body, 16b...Movable braking body, 17...
Operating means, 18... Brake release lever, 22... Operating lever, 25... Cam driven roller, 26...
Brake springs, 29a, 29b...Links, 31...Springs that bias the braking state, 3
5... Cam for stopping the following transport vehicle, 36... Contact surface, 37, 43... Stopper, 38... Sub roller, 39... Cam rail, 41... Cam for stopping the transport vehicle (stopping means), 44... ...Feeder for transfer to transport vehicle, 52...Tiltable loading platform,
54... A pushchair that can be raised and lowered.

Claims (1)

[Scope of utility model registration request] A carrier movably supported on a guide rail includes a gear wheel rotatable about a vertical axis, a vertically movable cone clutch type braking means for switching the gear wheel between a fixed state and a rotatable state, and the braking means. a spring that biases the gear into a braking state and fixes the gear; an operating lever that extends forward and is movable up and down;
interlocking means that switches the braking means to a brake release state in conjunction with the upward movement of the operating lever, and a subsequent carriage stopping cam that moves the operating lever of the succeeding carriage upward when the succeeding carriage approaches;
A drive means such as a chain that engages with the gears and moves along the guide rail, and a transport vehicle stopping means that performs the same function as the following vehicle stopping cam are provided beside the guide rail. Trolley type asynchronous transport device.