CN116620771A - Fork stretching device, fork stretching system and code wheel removing machine - Google Patents

Abstract

The application discloses a fork stretching device, a fork stretching system and a code stripping disc machine, which comprise a bearing part capable of moving along the vertical direction, fork arms arranged on the bearing part and a trigger piece arranged on the bearing part and linked with the fork arms, wherein the fork arms have a fork stretching state and a fork collecting state, and the trigger piece can be triggered by the movement of the bearing part to enable the fork arms to be switched between the fork stretching state and the fork collecting state. According to the technical scheme of the application, the extending fork and the retracting fork can be controlled only through a pure mechanical structure, and an additional driving mechanism is not needed, so that the cost is greatly saved.

Description

Fork stretching device, fork stretching system and code wheel removing machine

Technical Field

The application relates to the field of storage, in particular to a fork stretching device, a fork stretching system and a code wheel removing machine.

Background

The current logistics industry uses intelligent warehouse system to manage goods more and more, and correspondingly, the huge tray that appears needs to deposit management, and manual stacking tray inefficiency just stacks irregularly, extravagant manpower, material resources, increase cost. Therefore, the code wheel removing machine is compliant, and the code wheel removing machine can automatically complete the code wheel and the disc removing work. The fork stretching device is used for stretching the fork arm to the bottom of the tray and lifting or lowering the tray.

However, the existing products on the market require a set of driving mechanisms on the fork-extending device or a set of driving mechanisms for the selection of the code-removing function. Generally, at least three sets of drive mechanisms are required to achieve tamper compatibility, increasing cost.

Therefore, how to reduce the driving mechanism on the premise of not influencing the function of the unpacking is a technical problem to be solved by the application.

Disclosure of Invention

In view of the above, the present application provides a fork extending device, a fork extending system and a code wheel removing machine, so as to overcome the above technical problems.

According to the technical scheme of the application, the fork extending device comprises a bearing part capable of moving along the vertical direction, a fork arm arranged on the bearing part and a trigger piece arranged on the bearing part and linked with the fork arm, wherein the fork arm is provided with a fork extending state and a fork receiving state, and the trigger piece can be triggered by the movement of the bearing part to enable the fork arm to be switched between the fork extending state and the fork receiving state.

Preferably, the fork extending device includes a conversion shaft rotatably mounted on the bearing part, a rotation axis of the conversion shaft extends along a horizontal direction, the fork arm is fixed on the conversion shaft, the fork extending device includes two triggering pieces, the two triggering pieces are perpendicular to the rotation axis, are angularly mounted on the conversion shaft and synchronously rotate along with the conversion shaft, when one triggering piece is in a triggering state, the other triggering piece is in a standby state, and the triggering piece and the fork arm are set as follows: when one of the triggering pieces is in a triggering state, the fork arm is in the fork extending state; when the other trigger piece is in a trigger state, the fork arm is in the fork-folding state.

Preferably, the two triggering pieces are respectively mounted at different positions in the axial direction of the switching shaft.

Preferably, the carrying part comprises a back plate, the fork arm is provided with an arm part for carrying the tray and a horizontal limiting part, and when the fork arm is in the stretched state, the horizontal limiting part is positioned below the arm part and is stopped on the back plate.

Preferably, the fork extending device is provided with a holder for holding the fork arm in the extended or retracted state.

Preferably, the holder includes a crank mounted to the switching shaft at an angle to the arm portion, the crank being connected to the bearing portion by the tension spring, the tension spring being always kept in a stretched state, and the holder is configured to: when the tension spring is in the maximum stretching state, the fork arm is in an intermediate state between the stretching state and the fork-folding state, and the crank horizontally extends.

According to the technical scheme of the application, the application also provides a fork extending system, which comprises: the trigger piece in the trigger state is partially projected in the vertical direction to be overlapped with the conversion mechanism, and the trigger piece in the standby state is projected in the vertical direction to be not overlapped with the conversion mechanism.

Preferably, the switching mechanism is capable of adjusting the position in the vertical direction.

Preferably, the fork extending system comprises a longitudinal beam, the conversion mechanism comprises a positioning part connected with the longitudinal beam, and a conversion piece which is biased at a working position and is installed at the positioning part, the conversion piece comprises a stop surface capable of contacting with the trigger piece and a passing surface, so that the stop surface stops the trigger piece in a trigger state in the moving process of the fork extending device, and the passing surface can be abutted by the trigger piece to overcome the biasing force to move so as to avoid the trigger piece.

According to the technical scheme of the application, the application further provides a disc stripping machine, which comprises a frame, a driving mechanism and the fork extending system, wherein the fork extending device is movably arranged on the frame, and the driving mechanism is arranged on the frame to drive the fork extending device to move.

According to the technical scheme of the application, the fork stretching device can switch the fork stretching or fork folding of the fork arm through the trigger piece when passing through a specific position in the moving process, replaces the control of a driving mechanism, and can realize the fork stretching or fork folding only through a mechanical structure, thereby greatly reducing the cost.

Additional features and advantages of the application will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 is a schematic view of a fork apparatus according to one embodiment of the present application;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a fork system according to one embodiment of the present application;

fig. 4 is a schematic diagram of a de-palletizer according to one embodiment of the present application.

Description of the reference numerals

1: a fork extending device;

101: a fork arm;

1011: an arm section;

1012: a vertical limit part;

1013: a horizontal limit part;

102: a switching shaft;

103: a trigger;

1031: a first trigger;

1032: a second trigger;

104: a clamp;

105: a crank;

106: a tension spring;

110: a carrying part;

111: a back plate;

112: a traction member;

2: a longitudinal beam;

201: an adjustment tank;

3: a conversion mechanism;

301: a positioning part;

3011: a limit groove;

302: a conversion plate;

3021: a stop surface;

3022: a passing surface;

303: a limiting pin;

304: a rotation pin;

4: a frame;

401: a base;

5: a driving mechanism;

6: a transmission shaft;

601: a driving wheel;

602: a driving wheel;

7: a drive chain;

8: and (5) pulling the chain.

Detailed Description

The technical scheme of the present application will be described in detail below with reference to the accompanying drawings in combination with embodiments.

According to one aspect of the present application, there is provided a fork extension device, including a carrying portion 110 capable of moving in a vertical direction, a fork arm 101 mounted on the carrying portion 110, and a trigger member 103 mounted on the carrying portion 110 and linked with the fork arm 101, wherein the fork arm 101 has a fork extension state and a fork retraction state, and the trigger member 103 can be touched by movement of the carrying portion 110 to switch the fork arm 101 between the fork extension state and the fork retraction state.

In this technical scheme, stretch fork device can include a plurality of, for example can be two, thereby lie in the both sides of tray respectively and cooperate synchronous motion with each other and carry out coded disc or tear dish open. The fork arm 101 may be in a suitable form, for example, the portion for supporting the tray may be an integral part, or may include a plurality of parts, which are respectively used for carrying different positions on one side of the tray, so long as the tray can be carried, which is not limited herein. The fork arm 101 may take any suitable form, for example, a fork arm and a fork arm which rotate in a horizontal plane about a vertical axis may be used, or a fork arm and a fork arm which are lifted and put flat about a horizontal axis may be used, so long as it is ensured that the fork arm 101 can avoid a tray or the like in a retracted state so that the carrier 110 can move unimpeded, and the fork arm 101 can lift the tray in a fork state so that the tray can move with the carrier 110. Wherein, the trigger piece 103 can be linked with the fork arm 101, and the fork arm 101 can be synchronously moved by touching the trigger piece 103 to trigger the trigger piece 103, so as to switch between a fork extending state and a fork receiving state. The trigger piece 103 can be triggered by contacting with the trigger mechanism when passing through the trigger mechanism with a fixed position in the moving process of the bearing part 110, so that the fork arm 101 linked with the trigger piece 103 can switch between a fork extending mode and a fork retracting mode, wherein the trigger piece 103 can take various proper forms, for example, the trigger piece 103 can be provided with two trigger parts, the two trigger parts are in an L-shaped arrangement, the trigger can be performed through the two trigger parts, in addition, the two trigger pieces 103 with separate trigger parts can be respectively installed at different positions in the axial direction of the conversion shaft 102, for example, the trigger pieces 103 are respectively located at two ends of the conversion shaft 102, and the trigger pieces 103 can be respectively in a trigger state and a standby state and can be mutually converted.

According to the technical scheme, in the actual operation process, the bearing part 110 moves up and down, and the trigger piece 103 can be triggered at a preset position through the trigger mechanism by moving the bearing part 110, so that the fork arm 101 stretches or withdraws at the preset position to perform disc disassembling and disc stacking operations. According to the technical scheme, the fork arm 101 is switched to extend and retract through a pure mechanical structure, a driving mechanism is not required to be additionally provided, and the cost is greatly reduced.

The fork extension device may take a suitable form so that the fork arm 101 is switched between a fork extension state and a fork retraction state by means of the trigger member 103, and according to a preferred embodiment, as shown in fig. 1 and 2, the fork extension device 1 comprises a switching shaft 102 rotatably mounted to the carrying part 110, the rotation axis of the switching shaft 102 extending in a horizontal direction, the fork arm 101 being fixed to the switching shaft 102, the fork extension device comprises two trigger members 103, the two trigger members 103 being mounted to the switching shaft 102 at an angle to the rotation axis and rotating synchronously with the switching shaft 102, and when one of the trigger members 103 is in the trigger state, the other trigger member 103 is in the standby state, the trigger member 103 and the fork arm 101 being arranged: when one of the triggering pieces 103 is in a triggering state, the fork arm 101 is in the fork extending state; when the other trigger piece 103 is in the trigger state, the fork arm 101 is in the fork-folding state.

In this embodiment, the conversion shaft 102 is rotatably mounted on the bearing 110, and bearings may be mounted on both sides of the conversion shaft 102 in the axial direction and fixed to the bearing 110 by the bearings so that the conversion shaft 102 can smoothly rotate. Fig. 2 shows a manner of switching the different states of the yoke 101 according to an embodiment, in which the yoke 101 is fixed to the switching shaft 102 so that the yoke 101 can rotate around the switching shaft 102, and specifically, the different states of the yoke 101 are switched by rotating around the switching shaft 102: a furling state (shown in broken lines in fig. 2) when the fork arm 101 is lifted upward so as to be in a position where it is prevented from contacting the tray; the fork arm 101 is extended along a horizontal line, so that it is in a fork-extended state when it is in a position capable of supporting a tray. In order to support the tray, the rotation of the yoke 101 may be restricted in various forms, so that the yoke 101 is prevented from sinking when in the extended state, for example, the switching shaft 102 may be rotated only within a limited range of angles (e.g., 60 °, 90 °, etc.) by a limiting structure.

The trigger member 103 includes two and is fixedly mounted to the switching shaft 102 at an included angle of a specific angle (e.g., 60 °, 90 °, etc.). The trigger member 103 is in a trigger state when the trigger member 103 is in a horizontally extended state, and the trigger member 103 can be in contact with the trigger mechanism; when the trigger 103 is retracted downward or upward, the trigger 103 is in a standby state, and the trigger 103 cannot contact the trigger mechanism. And, the triggering state of one of the triggering pieces 103 can correspond to the extending state of the fork arm 101; while the triggering state of the other triggering piece 103 corresponds to the forked state of the fork arm 101, the two triggering pieces 103 are fixed in relative position so that when one triggering piece 103 is in the triggering state, the other is in the standby state, and vice versa.

Through this technical scheme, because trigger piece 103 and yoke 101 all install on conversion axle 102 for trigger piece 103 and yoke 101 can be synchronous around the axis rotation, and two trigger pieces 103 are in trigger state and standby state respectively, so that it can carry out state conversion through trigger mechanism in predetermined position, and then control yoke 101 stretches fork or receives the fork. Two of the triggering pieces 103 may be mounted in various forms and in various forms, for example, the triggering pieces 103 may be mounted on the shaft body of the switching shaft 102 by bolts, welding, or the like. Preferably, the trigger 103 may be secured to the shift shaft 102 by a clip 104 to adjust its position and angle. Also, the two triggering pieces 103 may be installed at the same position or different positions in the axial direction of the switching shaft 102 as long as the state thereof can be switched by the triggering mechanism, which is not limited herein.

The triggering element 103 may take a suitable form to control the triggering element 103 to be able to be triggered at different positions, according to a preferred embodiment, as shown in fig. 1, two of said triggering elements 103 are mounted at different positions in the axial direction of said switching shaft 102, respectively.

By this solution, the two triggering pieces 103 can be matched with the two triggering mechanisms to switch the state at different positions, thereby changing the state of the fork arm 101. Illustrating: the trigger 103 includes a first trigger 1031 and a second trigger 1032, where the yoke 101 is in a fork state, the first trigger 1031 is in a trigger state, and the second trigger 1032 is in a standby state, when the carrier 110 moves down to a first height to make the first trigger 1031 touch the trigger mechanism, the first trigger 1031 is triggered to rotate upwards, and the yoke 101 and the second trigger 1032 synchronously rotate upwards until the first trigger 1031 is converted to a standby state, the yoke 101 is converted to a fork-folding state, and the second trigger 1032 is in a trigger state, thereby completing the fork-folding operation. When the carrier 110 moves up to the second height again to make the second trigger 1032 in the triggered state touch the other trigger mechanism, the second trigger 1032 rotates downward, and the fork arm 101 and the first trigger 1031 simultaneously rotate downward until the second trigger 1032 enters the standby state, the fork arm 101 is converted into the fork-extending state, and the first trigger 1031 enters the triggered state, thereby completing the fork-extending operation.

In order to limit the rotation range of the fork arm 101 to avoid sinking in the fork-extended state, the fork extension device 1 may take a suitable form, and according to a preferred embodiment, as shown in fig. 1 and 2, the carrying part 110 includes a back plate 111, the fork arm 101 has an arm 1011 for carrying the tray and a horizontal limiting part 1013, and the horizontal limiting part 1013 is located below the arm 1011 and stops against the back plate 111 when the fork arm 101 is in the fork-extended state, so that the arm 1011 cannot be further turned over and moved down.

In this embodiment, the fork arm 101 has a horizontal limiting part 1013 protruding from a bending, and the horizontal limiting part 1013 may have a relatively flat contact surface for contacting and supporting against the back plate 111, so that the fork arm 101 can maintain a horizontally extending state without sinking when in a fork extending state, so as to support the tray, and the horizontal limiting part 1013 does not limit the fork arm to rise upwards and rotate to a fork receiving state, for example, the arm 1011 can be rotated to a position for supporting against the back plate 111 to receive the fork.

Through this technical scheme, can restrict the rotation scope of yoke 101, make yoke 101 can only rotate in approximately 90 angular range, the limit of rotation scope corresponds respectively and receives fork state and stretches fork state to the bearing tray that yoke 101 can be stable under stretching fork state.

In addition, since the arm 1011 only needs to be prevented from contacting the tray in the fork-folding state, the fork arm 101 may be further provided with a vertical limiting portion 1012 (as shown in fig. 2), and when the fork arm 101 is in the fork-folding state, the vertical limiting portion 1012 abuts against the back plate 111 so that the arm 1011 cannot continue to approach the back plate, thereby further limiting the rotation angle of the fork arm 101 and improving the sensitivity of the conversion of the fork arm 101 between the fork-stretching state and the fork-folding state.

In order to keep the yoke 101 in the extended or retracted state, avoiding undesired state transitions of the yoke 101 due to vibrations or other factors or in an intermediate state between the extended and retracted state, the fork device 1 is provided with a holder for holding the yoke 101 in the extended or retracted state.

In this embodiment, the holding mechanism may be of any suitable form, and for example, magnets may be attached to the horizontal stopper 1013 and the vertical stopper 1012 and the back plate to hold the yoke by magnetic force, or a tension spring eccentric to the switching shaft 102 may be used to hold the yoke 101 in the extended state or the retracted state without applying a force exceeding a specific strength.

Through the technical scheme, the fork arm 101 can be kept in the extending fork state or the receiving fork state by the retaining mechanism, so that the fork arm 101 is prevented from shaking due to vibration and other factors in the moving process of the bearing part 110, and even the fork arm 101 is enabled to be in state transition at an unexpected position.

The holding mechanism may take a suitable form, according to a preferred embodiment, as shown in fig. 1, the holder includes a crank 105 and a tension spring 106, the crank 105 is mounted to the switching shaft 102 at an angle to the arm 1011, the crank 105 is connected to the bearing 110 by the tension spring 106, the tension spring 106 is always kept in a stretched state, and the holder is provided with: when the tension spring 106 is in the maximum tension state, the yoke 101 is in an intermediate state between the extended state and the retracted state and the crank 105 is horizontally extended.

In this technical solution, a retaining mechanism may be disposed at two ends of the conversion shaft 102, the crank 105 is fixed to the conversion shaft 102 so as to be capable of rotating synchronously with the conversion shaft 102, two ends of the tension spring 106 are respectively connected with the crank 105 and the bearing portion 110 to provide a pulling force for pulling the crank 105, in order to make the crank 105 cooperate with the tension spring 106 to maintain the fork or fork-receiving state of the fork arm 101, the crank 105 and the arm 1011 are disposed at an angle so as to achieve an intermediate state between the fork and fork-receiving state when the tension spring 106 reaches the maximum tensile state by rotating the crank 105, since the maximum tensile state of the tension spring 106 is an unstable state, there is a tendency of contracting, the crank 105 can be pulled to rotate selectively in two opposite directions to reduce the tendency of the tensile degree, and the retaining mechanism is in a stable state under the fork-receiving state due to the limit of the fork arm 101.

By this solution, the tension spring 106 provides a resistance against the change of state of the yoke 101, when the force applied to the trigger 103 is smaller than this resistance, the yoke 101 can remain in the current state, and only when the force applied is greater than this resistance, the yoke 101 will disengage from the holding of the holding mechanism, and thus switch state, while the holding mechanism will enter a new stable state, thus holding the yoke 101 in the new state. Therefore, the yoke 101 can be kept stable in the extended state and the retracted state, and an undesired positional shift of the yoke 101 due to vibration or the like is avoided.

In another aspect of the present application, there is provided a fork system comprising: the switching mechanism 3 and the fork-extending device 1 as described above, wherein a partial projection of the trigger piece 103 in the trigger state in the vertical direction overlaps the switching mechanism 3, and a projection of the trigger piece 103 in the standby state in the vertical direction does not overlap the switching mechanism 3.

According to the technical scheme, when the carrying part 110 moves and passes through the switching mechanism 3, the triggering piece 103 in the triggering state can contact the switching mechanism 3, and as the carrying part 110 moves, the switching mechanism 3 applies upward or downward force to the triggering piece 103 in the triggering state, so that the triggering piece 103 rotates around the switching shaft 102 to be switched from the triggering state to the standby state, and the state of the fork arm 101 is switched.

In order to enable the switching mechanism 3 to trigger the trigger piece 103 in different positions, according to a preferred embodiment, the switching mechanism 3 is vertically adjustable in position.

According to the technical scheme, an operator can adjust the position of the conversion mechanism 3 to convert the state of the fork arm 101 when the fork stretching device 1 passes through a specific position in the moving process.

The fork extension system may take a suitable form to realize the state transition of the fork arm 101 controlled by the transition mechanism 3, as shown in fig. 3, the fork extension system comprises a longitudinal beam 2, the transition mechanism 3 comprises a positioning part 301 connected with the longitudinal beam 2, and a transition piece 302 mounted on the positioning part 301 and biased in an operating position, the transition piece 302 comprises a stop surface 3021 capable of contacting with the trigger piece 103 and a passing surface 3022, so that the stop surface 3021 stops the trigger piece 103 in the trigger state during the movement of the fork extension device 1, and the passing surface 3022 can be pushed by the trigger piece 103 to overcome the biasing force to avoid the trigger piece 103.

In the present solution, the conversion mechanism 3 may be mounted by the side member 2, and the side member 2 may be provided with the adjustment groove 201 and the positioning portion 301 may be mounted with the adjustment groove 201 by bolts, so that the conversion mechanism 3 can adjust the position in the vertical direction on the side member 2. In order to keep the conversion mechanism 3 and the longitudinal beam 2 stable, the longitudinal beam 2 may be provided with a plurality of adjusting grooves 201, and the positioning portion 301 passes through the adjusting grooves 201 through a plurality of bolts so as to firmly position the conversion mechanism 3 on the longitudinal beam 2.

Since in the extended state, one of the triggering pieces 103 is in the triggered state and is affected by the limitation of the fork arm 101, the triggering piece 103 can only rotate in one direction but cannot rotate in the other direction, for example, the first triggering piece 1031 in the triggered state in fig. 1 can only rotate upwards, so that the fork arm 101 enters the fork-collecting state, but the first triggering piece 1031 cannot rotate downwards due to the limitation of the fork arm 101, so that the switching mechanism 3 can only contact the first triggering piece 1031 from below. To meet the requirement that the trigger member 103 passes through the switch mechanism 3 in the triggered state without being hindered by it, the switch mechanism 3 includes a switch plate 302 that can pass the trigger member 103 in one direction, as shown in fig. 3, the switch plate 302 may have a stop surface 3021 capable of stopping the trigger member 103 and a passing surface 3022 capable of avoiding the trigger member when being interfered by the trigger member 103 to pass through. Wherein, the conversion piece 302 may be rotatably connected with the positioning portion 301 through the rotation pin 304, and the positioning portion 301 may be provided with an arc-shaped limit groove 3011, and the limit pin 303 mounted on the conversion piece 302 may be embedded into the limit groove 3011 to limit the movement of the conversion piece 302, where the conversion piece 302 may have a tendency to pop out (i.e. extend out of the outline range of the positioning portion 301) through a spring or the like, so as to meet the requirement that the trigger piece 103 can abut against the stop surface 3021 of the conversion piece 302 from one direction, thereby converting the trigger piece 103 into a standby state; and the trigger member 103 can abut against the passing surface 3022 of the conversion plate 302 from the other direction so as to overcome the resistance of the conversion plate 302 and avoid the trigger member 103, thereby allowing the trigger member 103 to pass smoothly through the conversion mechanism. Wherein the pass-through surface 3022 may be beveled so that the force of the trigger 103 against the pass-through surface 3022 can have a horizontal component to push the conversion plate 302 against the resistive force.

By means of the technical scheme, the trigger piece 103 in the trigger state can pass through the switching mechanism 3 in one direction, and control of the fork arm 101 is more flexible.

In another aspect of the present application, a disc stripping machine is provided, which comprises a frame 4, a driving mechanism 5 and the fork extending system as described above, wherein the fork extending device 1 is movably mounted on the frame 4, and the driving mechanism 5 is mounted on the frame 4 to drive the fork extending device 1 to move.

In this technical scheme, stretch fork system can be paired the setting in the both sides of frame 4 for the bearing is sent into by the transfer chain tray, and actuating mechanism 5 and transmission shaft 6 can be installed on the base 401 of frame 4, and transmission shaft 6 can be installed with transmission shaft 6 synchronous rotation's drive wheel 601 and drive wheel 602, and drive chain 7 can be overlapped and locate actuating mechanism 5's rotation part and drive wheel 601, and drive chain 8 can be overlapped the tight pulley at drive wheel 602 and frame top, and drive chain 8 can be connected with the top and the bottom of stretching fork device 1 through traction piece 112, so that actuating mechanism 5 can drive transmission shaft 6 rotation through drive chain 7, thereby make transmission shaft 6 make stretch fork device 1 reciprocate through drive chain 8. The driving wheel 602 may have two driving wheels, which are respectively mounted on two sides of the driving shaft 6 in the axial direction, and each fork extending device 1 may be pulled by two pulling chains 8.

The specific operation procedure is illustrated by fig. 3:

taking fig. 3 as an initial state as an example: when the fork device 1 is lifted, the first trigger 1031 abuts against the passing surface 3022 of the higher switching mechanism 3, and the passing surface 3022 is retracted by resistance to allow the first trigger 1031 to pass through, so that the fork arm 101 can keep the fork-stretching state to move to the highest position. At this time, if the fork extension device 1 starts to descend, the first trigger 1031 will abut against the stop surface 3021 of the higher switching mechanism 3, so that the first trigger 1031 is switched to the standby state, and at the same time, the second trigger 1032 enters the triggered state, and the fork arm 101 is switched to the fork-retracted state. When the fork extension device 1 continues to descend, the second trigger member 1032 in the triggered state abuts against the passing surface 3022 of the lower switching mechanism 3, and the passing surface 3022 is retracted by resistance to avoid the second trigger member 1032 from passing, so that the fork arm 101 can keep the fork extension state to move to the lowest position. When the fork device 1 rises again, the second trigger member 1032 in the triggered state will abut against the stop surface 3021 of the lower switching mechanism 3, so that the second trigger member 1032 is switched to the standby state, and at the same time, the first trigger member 1031 enters the triggered state, and the fork arm 101 is switched to the fork state again.

It should be noted that the mounting manner of the switching mechanism 3 needs to conform to the switching direction limitation of the trigger 103, that is, when the trigger 103 is rotated in one direction to be switched to the triggered state, the trigger cannot continue to rotate in the direction, and thus the stop surface 3021 cannot continue to abut against the trigger 103 in the direction.

It can be understood from the above procedure that the installation position of the conversion mechanism 3 can control the trigger member 103 to perform state conversion at the position, so as to control the fork extending and receiving of the fork arm 101, therefore, during the disc removing and stacking operation, only the position of the conversion mechanism 3 needs to be adjusted, so that the fork arm 101 can be controlled to extend and receive at the predetermined position, and the disc removing or stacking operation can be performed.

Through this technical scheme, through the different position installation shifter 3 at longeron 2 can make stretch fork device 1 when passing shifter 3, get into and stretch fork state or receive fork state to tear open a dish or code wheel operation open fork and receive the fork and only can control through pure mechanical structure, and need not extra actuating mechanism, saved the cost greatly.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the scope of the technical concept of the present application, and all the simple modifications belong to the protection scope of the present application.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the application can be made without departing from the spirit of the application, which should also be considered as disclosed herein.

Claims (10)

1. The fork extending device is characterized by comprising a bearing part (110) capable of moving along the vertical direction, a fork arm (101) mounted on the bearing part (110) and a trigger piece (103) mounted on the bearing part (110) and linked with the fork arm (101), wherein the fork arm (101) has a fork extending state and a fork receiving state, and the trigger piece (103) can be touched through the movement of the bearing part (110) to enable the fork arm (101) to be switched between the fork extending state and the fork receiving state.

2. The fork device according to claim 1, wherein the fork device (1) comprises a switching shaft (102) rotatably mounted to the carrier (110), the rotation axis of the switching shaft (102) extending in a horizontal direction, the fork arm (101) being fixed to the switching shaft (102), the fork device comprising two triggering members (103), the two triggering members (103) being mounted to the switching shaft (102) at an angle perpendicular to the rotation axis and rotating synchronously with the switching shaft (102), the other triggering member (103) being in a standby state when one of the triggering members (103) is in a triggering state, the triggering members (103) being arranged with the fork arm (101) such that: when one of the triggering pieces (103) is in a triggering state, the fork arm (101) is in the fork extending state; when the other trigger piece (103) is in the trigger state, the fork arm (101) is in the fork-folding state.

3. The fork device according to claim 2, characterized in that two of the triggering elements (103) are each mounted at a different position in the axial direction of the switching shaft (102).

4. A fork device according to any one of claims 1 to 3, wherein the carrying part (110) comprises a back plate (111), the fork arm (101) having an arm (1011) for carrying a pallet and a horizontal limiting part (1013), the horizontal limiting part (1013) being located below the arm (1011) and stopping against the back plate (111) when the fork arm (101) is in the fork state.

5. The fork device according to claim 4, characterized in that the fork device (1) is provided with a holder for holding the fork arm (101) in the extended or retracted state.

6. The fork device according to claim 5, characterized in that the holder comprises a crank (105) and a tension spring (106), the crank (105) being mounted to the conversion shaft (102) at an angle to the arm (1011), the crank (105) being connected to the carrier (110) by the tension spring (106), the tension spring (106) being kept in a stretched state all the time, and the holder being arranged: when the tension spring (106) is in the maximum tension state, the fork arm (101) is in an intermediate state between the extended fork state and the retracted fork state, and the crank (105) extends horizontally.

7. A fork system, comprising: conversion mechanism (3) and fork-extending device (1) according to any one of claims 1 to 6, wherein a partial projection of the trigger piece (103) in the triggered state in the vertical direction overlaps the conversion mechanism (3), and a projection of the trigger piece (103) in the armed state in the vertical direction does not overlap the conversion mechanism (3).

8. The fork system according to claim 7, characterized in that the conversion mechanism (3) is vertically adjustable in position.

9. The fork system according to claim 8, characterized in that the fork system comprises a longitudinal beam (2), the changeover mechanism (3) comprises a positioning part (301) connected with the longitudinal beam (2), and a changeover tab (302) mounted to the positioning part (301) and biased in an operating position, the changeover tab (302) comprising a stop surface (3021) which can be brought into contact with the trigger piece (103) and a pass-through surface (3022) such that during movement of the fork device (1), the stop surface (3021) stops the trigger piece (103) in the triggered state, the pass-through surface (3022) being movable against a biasing force by the trigger piece (103) to avoid the trigger piece (103).

10. A code wheel machine, characterized by comprising a frame (4), a driving mechanism (5) and a fork extending system according to any one of claims 7 to 9, wherein the fork extending device (1) is movably mounted on the frame (4), and the driving mechanism (5) is mounted on the frame (4) to drive the fork extending device (1) to move.