JPS5815429Y2 - Automatic gripping device for conveyor - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic gripping device for a conveying machine used for conveying rolling materials, forging materials, etc., or for transferring and conveying small workpieces, etc. in assembly lines. It is.

Conventionally, when transporting the above-mentioned items, a gripping device is provided that has a claw opening/closing device that is operated by wire binding, air suction, electromagnetic suction, or manual operation of a chain or wire, etc. At the same time, conveyance is performed by hanging a gripping device from a hook of a conveyor to grasp, release, or lift the conveyed object.

However, in the case of the above-mentioned conveyed objects, red-hot state,
At least many of them are in a high temperature state, and it is impossible to bind them with wires or attract them with air or electromagnets.
Particularly in assembly line work, binding with wires impedes work efficiency, and adsorption with air or electromagnets requires energy sources such as electricity, air, oil, etc.

Furthermore, even in the manually operated gripping device described above, (1) If the object to be transported is in a red-hot state, heat protection measures are required for the workers, and even then, poor working conditions cannot be avoided.

(2) When using a gripping device, the direction of the gripping device is limited because a place for operating the chain, wire, etc. is required.

(3) Due to the characteristics mentioned in the previous paragraph, the usable area of the storage area for transported objects is limited depending on the shape of the transported objects.

(4) Since manual operation is required when opening and closing, it is necessary to arrange a worker for this manual operation, which increases labor costs.

(5) Due to the nature of the location where the gripping device must be opened and closed, the placement of workers is inappropriate for safety reasons.

There were other drawbacks.

The present invention aims to eliminate such conventional drawbacks and thereby provide an automatic gripping device for a conveyor machine that saves labor, makes effective use of work space, improves efficiency, safety, and saves energy. That is the purpose.

Hereinafter, the present invention will be explained based on the accompanying drawings showing one embodiment thereof.

In FIGS. 1 to 6, numerals 1 and 2 refer to the arm portions 1',
The two grip plates are connected by the grip plate shaft 3 passing through the grip plate shaft 3 at approximately the center of the grip plate 2', and both of the grip plates are rotatable around the grip plate shaft 3 and are kept open at a constant angle. It is constructed so that it does not open more than a certain degree.
In addition, a hook 4 of the conveyor is attached to one end of the arms 1' and 2'.
A wire 5 or the like is attached to the wire 5 to hang the gripping device, and gripping portions 1'' and γ for gripping the conveyed object are formed at the other end, respectively.

Reference numeral 6 denotes a push-up rod fixed to the grip plate 2 on the side of the grip plate shaft 3, for example, the left side in the figure, and moves up and down as the grip plate 2 moves up and down, and its upper surface forms the contact surface 7. ing.

Reference numeral 8 denotes a fixed lever whose central portion is rotatably mounted on a fixed lever shaft 9 fixed to the grip plate 1. A fixed lever guide section 10 is provided at one end of the fixed lever, and a fixed lever shaft 9 is attached to the other end of the fixed lever. When the lever pawl 11 is under the force and the fixed lever guide section 10 has entered the trough 13 of the cam 12 which will be described later, the gripping device is lifted and the gripping plate 2 is rotated to the left and the gripping plate 1 is rotated to the right. When the fixed angle reaches a predetermined angle, the fixed lever pawl 11 engages with the fixed pin 14 fixed to the grip plate 2, thereby rotating the grip plate, that is, the grip part 1
", 2" is prevented from further closing, gripping portion 1", f
A fixing lever pawl 11 is formed and a fixing pin 14 is installed so as to maintain the opening to a certain extent.

15 is a ratchet control rod, and in the middle thereof,
On the ratchet wheel shaft 16 fixed to the grip plate 1, together with the cam 12, a ratchet wheel 17 is fixed.
Both are rotatably supported, and a follower 18 is provided at one end so as to be in contact with the contact surface 7 of the push-up rod 6, and a ratchet that engages with a ratchet wheel 17 is provided at the other end. 19 is rotatably mounted at its base.

The ratchet control rod 15 is arranged so that the follower 18 is always lowered by gravity, and the ratchet 19 is also always engaged with the ratchet wheel 17.

Further, the cam 12 is formed such that its peaks 20 and valleys 13 are located at four locations around the entire circumference, and the ratchet wheel 17 provided integrally with the cam 12 also has peaks 20 and troughs 13 ( Ratchet teeth are provided corresponding to the grooves 13 and with which the ratchet 19 engages.

21 is a lower limit stopper provided on the grip plate 1 that hits the ratchet operation rod 15 and limits its rotation when the ratchet operation rod 15 rotates counterclockwise and the follower 18 lowers; the lower limit stopper 21 and the grip plate 1 .

In this embodiment, the ridges and troughs of the circumferential cam 12 and the ratchet teeth of the ratchet wheel 17 are four or a multiple thereof, but they are equally divided into numbers other than four, and the ratchet control rod 15 is divided into four. The rotation angles may be made to correspond, and the circumferential cam 12 may be a cam having a shape such as a surface cam.

The present invention has such a configuration, and its operation will be explained next.

First, when lowering the gripping device to grip the conveyed object, the gripping plates 1 and 2 open as the gripping device descends, and the push-up rod 6 rises and the follower comes into contact with its contact surface 7. 18, push up the ratchet control rod 15,
The grip plates 1 and 2 are fully opened in the state shown in FIGS. 3 and 4, and as a result, the peak 20 of the cam 12 and the fixed lever 8
When the fixed lever guide part 10 comes into contact with the fixed lever guide part 10, the fixed lever 8 rotates clockwise, so that the fixed lever pawl 11 escapes to the left in the figure, and as shown in FIG. Even if the grip plates 1 and 2 turn in the closing direction due to lifting of the grip device, the fixing pin 14
and the fixed lever pawl 11 do not engage.

The gripping plates 1, 2 are therefore pivoted to close the gripping portions 1'', 7/ until the conveyed article is gripped by the gripping portions 1'', 1'.

In this case, as the grip portions 1//, f are closed, the push-up rod 6 is lowered, and the follower 18 of the ratchet control rod 15 is also lowered, causing the ratchet control rod 15 to rotate counterclockwise until it hits the lower limit stopper 21. The ratchet 19 advances one ratchet tooth against the ratchet wheel.

Next, when the object to be conveyed is to be released, by placing the object against the stationary surface, the grip portions 1' will naturally open and release the object. In order to also raise the push-up rod 6, the ratchet control rod 1
5 is also pushed up and rotated, and the cam 12 is rotated by a half pitch via the ratchet 19 attached to it and the ratchet wheel 17 engaged with it, and the fixed lever 8 is rotated. The fixed lever guide part 10 is joined to the valley 13 of the cam 12.

In this way, when the valley 13 of the cam 12 and the fixed lever guide part 10 are joined, the fixed lever 8 rotates to the left and the fixed recess 11 turns to the right.

In this way, the state in which the grip plates 1 and 2 are fully opened is shown, but as shown in FIGS. 5 and 6, in particular, as shown in FIG. is approaching.

If the gripping device is lifted in this state, the fixed lever pawl 11 and the fixed pin 14 will engage in the middle of the lifting, but until this engagement occurs, the gripping plates 1 and 2 operate to close and the push-up rod 6 The ratchet control rod 15 also lowers accordingly, and the ratchet 19 advances by one ratchet tooth.

However, both the gripping plates 1 and 2 are prevented from rotating any further, so that the gripping device is lifted up with the fixed lever pawl 11 left open to some extent.

Therefore, the gripped object to be transported is released, and preparations for gripping the next transported object can be maintained.

Since the present invention is constructed and operates in this way, the work of fixing the grip plate necessary for opening and closing the grip plate can be done automatically without requiring a separate worker or special energy. This eliminates the need for energy sources such as electricity, air, or oil for the placement of workers during opening/closing, and for transfers, etc., and also eliminates the need for energy sources such as electricity, air, or oil for transfers, etc., and also eliminates the need for heat protection measures, chains, and wires for workers when handling objects that are in a red-hot state. This not only eliminates the need for limiting the direction of the gripping device based on the need for scaffolding, as well as limiting the storage area for the transported object based on the shape of the transported object, as well as safety measures for workers, but also eliminates the need to open and close the gripping device. Since the fixing can be carried out automatically during the opening and closing operations, the gripping and disengaging operations, that is, the conveying operations can be carried out very quickly, smoothly and efficiently, which has very significant and many advantages.

[Brief explanation of the drawing]

Fig. 1 is an overall front schematic view of a gripping device of a conveyor, Fig. 2 is a plan view thereof, Fig. 3 is a plan view of an embodiment of the present invention in a state where the gripping operation is possible, and Fig. 4 is its plan view. IV-
5 is a sectional view taken along line IV; FIG. 5 is a plan view of the above embodiment in a state in which the grip plate can be lifted with it open;
FIG. 6 is a sectional view taken along line VI-VI. 1.2...Gripper plate, 5...Wire, 6...Push-up bar, 7...Attaching surface, 8
...Fixed lever, 9...Fixed lever shaft, 10...Fixed lever guide section, 11...
・Fixed lever catch, 12...Cam, 13...
...Valley, 14...Fixing pin 15...
・Ratchet control rod, 16... Ratchet wheel axis, 17... Ratchet wheel, 18.
...Follower, 19...Ratchet, 20
...Mountain, 21...Lower limit stopper.

Claims (1)

[Claims for Utility Model Registration] Both central parts are rotatably connected to each other, and the grip part 1
" f is prevented from opening beyond a certain opening degree, and is lifted by a wire 5 etc. fixed to one end of each. A gripping device for a conveyor machine having two gripping plates 1 and 2. At one end, a cam 12 fixed to a ratchet wheel 1T, which is rotatably supported on a ratchet wheel shaft 16 fixed to one gripping plate 1, and a ratchet 19 engaged with a ratchet wheel 17 are connected to one end of the follower. 18
a ratchet control rod 15 having a grip plate 1 at the other end;
The lever is supported by a push-up rod 6 fixed to the grip plate 2 which is actuated by the follower 18 to rotate the ratchet control rod 15 when the lever 2 is opened, and a fixed lever shaft 9 fixed to the grip plate 1;
A fixed lever 8 which has a fixed lever guide part 10 in contact with the cam surface of the cam 12 at one end and a fixed lever pawl 11 at the other end.
, the fixed lever guide part 10 is aligned with the valley 13 or peak 20 of the cam surface.
When the gripping device is lifted with the gripping device in contact with the gripping device, the fixed lever pawl 11 can or cannot be engaged during the lifting. An automatic gripping device for a conveying machine comprising a lower limit stopper 21 installed on a gripping plate 1 for preventing descent.