A preform unloading mechanism for bottle blowing machine

Abstract

The present invention discloses a blank unloading mechanism for a bottle blowing machine, comprising: a plurality of blank insertion head mechanisms fixed on a conveying chain of the bottle blowing machine, and a manipulator fixed on a blank unloading area of ​​the bottle blowing machine; a fixed frame is fixedly arranged in the blank unloading area of ​​the bottle blowing machine, a driving structure is installed on the fixed frame, a connecting rod with a movable plate is vertically fixedly installed on a driving member of the driving structure, a left clamping arm of a left half clamping jaw is hinged to the left part of the movable plate, a right clamping arm of a right half clamping jaw is hinged to the right part of the movable plate, a locking structure is arranged between the left half clamping jaw and the right half clamping jaw to put the left half clamping jaw and the right half clamping jaw in a closed clamping state, and an unlocking structure for unlocking the locking structure and opening the left half clamping jaw and the right half clamping jaw to both sides is also arranged between the fixed frame and the left half clamping jaw and the right half clamping jaw. The blank unloading mechanism for a bottle blowing machine of the above structure has the advantages of simple structure, convenient maintenance, low manufacturing cost, and the ability to smoothly pull the blank insertion head out of the softened bottle blank.

Description

Technical Field

[0001] The invention relates to a bottle blowing machine, in particular to a blank unloading mechanism of the bottle blowing machine. Background Art

[0002] The bottle blowing machine is a mechanical equipment that blows plastic particles (softened into liquid) or bottle embryos into bottles through certain process means. It has replaced most manual bottle blowing production methods because of its advantages such as convenient and quick operation, large molding volume, good molding effect and high production efficiency.

[0003] The entire bottle blowing process of the bottle blowing machine can be divided into two parts: heating and forming. The former heats the preform to the required temperature, and the latter sends the heated preform into the bottle blowing mold for blowing and shaping. Among them, the preform is sent to the heating box for heating through the preform insertion head in the preform insertion head mechanism, and then the preform insertion head is pulled out from the preform after heating. At present, the commonly used preform insertion head mechanism pulls the preform insertion head out of the preform through the elastic force of the reset spring to realize the preform unloading operation, but the preform will become soft after heating, and it is easy to cause misalignment and increase the tension force of the preform on the preform insertion head. Therefore, it is very easy for the preform insertion head to be stuck in the softened preform because it cannot be pulled out and reset from the preform by the elastic force of the reset spring alone, causing the bottle blowing machine to be in a state of failure, affecting the normal operation of the entire beverage filling production line. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a preform unloading mechanism for a bottle blowing machine which has a simple structure and can smoothly pull out a preform inserting head from a softened bottle preform.

[0005] To solve the above problems, the technical solution adopted by the present invention is: the blank unloading mechanism of a blow molding machine comprises: a plurality of blank insertion head mechanisms fixed on the conveying chain of the blow molding machine, and a robot fixed in the blank unloading area of ​​the blow molding machine, the number of the robot is at least one, the arrangement spacing between the robots is consistent with the arrangement spacing between the blank insertion head mechanisms, and each robot is below the blank insertion head mechanisms in the blank unloading area, and each robot can grasp the blanks on the blank insertion head of the blank insertion head mechanism directly above it. A fixed frame is fixedly arranged in the unloading area of ​​the bottle blowing machine, and the fixed frame is above each blank insertion head mechanism in the unloading area. A driving structure is installed on the fixed frame, and a connecting rod is vertically fixedly installed on the driving member of the driving structure, and the connecting rod can move downward or upward under the drive of the driving structure; a movable plate is fixedly installed at the lower end of the connecting rod, the left clamping arm of the left half clamping jaw is hinged to the left part of the movable plate, and the right clamping arm of the right half clamping jaw is hinged to the right part of the movable plate, and a locking structure that makes the left half clamping jaw and the right half clamping jaw in a closed clamping state is arranged between the left half clamping jaw and the right half clamping jaw, and a locking structure that makes the left half clamping jaw and the right half clamping jaw in a closed clamping state is arranged between the fixed frame and the left half clamping jaw and the right half clamping jaw. An unlocking structure is also provided for unlocking the locking structure and allowing the left half jaw and the right half jaw to open to both sides respectively; the structure of each blank insertion head mechanism includes: a cylinder vertically fixedly installed on the conveying chain, an insertion and extraction rod movably inserted into the cylinder, a clamping portion for closing and clamping the left half jaw and the right half jaw is provided on the insertion and extraction rod extending out of the upper end of the cylinder, an insertion and extraction head is fixedly provided at the lower end of the insertion and extraction rod, and the lower end of the insertion and extraction head extends out of the lower end of the cylinder, and a reset mechanism is provided between the cylinder and the insertion and extraction rod, which enables the insertion and extraction rod clamped and pulled upward by the left half jaw and the right half jaw to automatically return downward to an unpulled position after the left half jaw and the right half jaw are opened.

[0006] During the preform unloading operation, the preform is clamped and grasped by the corresponding robot arm, and the insertion head inserted into the preform moves upward synchronously through the upward movement of the left half clamping jaw and the right half clamping jaw of the clamping part of the clamping and grasping insertion and extraction rod, thereby achieving the purpose of pulling the insertion head out of the preform.

[0007] Furthermore, the aforementioned unloading mechanism of a bottle blowing machine, wherein the locking structure is as follows: the left end of the front tension spring is fixedly mounted on the front side wall of the left clamping jaw arm, and the right end of the front tension spring is fixedly mounted on the front side wall of the right clamping jaw arm; the left end of the rear tension spring is fixedly mounted on the rear side wall of the left clamping jaw arm, and the right end of the rear tension spring is fixedly mounted on the rear side wall of the right clamping jaw arm; and the front tension spring and the rear tension spring are both located below the hinge point between the left clamping jaw arm and the movable plate, and the hinge point between the right clamping jaw arm and the movable plate; under the elastic force of the front tension spring and the rear tension spring, the left half clamping jaw swings inward around the hinge point between the left clamping jaw arm and the movable plate, and the right half clamping jaw swings inward around the hinge point between the right clamping jaw arm and the movable plate, so that the left half clamping jaw and the right half clamping jaw are in a closed clamping state.

[0008] Furthermore, in the aforementioned unloading mechanism of a bottle blowing machine, the claw hooks of the left half clamp and the right half clamp are both support bar structures placed horizontally from front to back, the number of left clamp arms is at least one, the number of right clamp arms is at least one, the number of left clamp arms and right clamp arms is the same, and the positions of the left clamp arms and the right clamp arms are symmetrically distributed relative to the vertical center plane of the movable plate.

[0009] When the number of left clamp arms is two or more, the number of front tension springs is one, and the front tension spring is located on the front side wall of the frontmost left clamp arm and the front side wall of the frontmost right clamp arm. The number of rear tension springs is one, and the rear tension spring is located on the rear side wall of the rearmost left clamp arm and the rear side wall of the rearmost right clamp arm.

[0010] In this solution, each left clamp arm is hinged to the left part of the movable plate in the following structure: a first hinge plate extending inwards is provided on the inner side wall of each left clamp arm, and the first hinge plate is hinged to the left part of the movable plate. Each right clamp arm is hinged to the right part of the movable plate in the following structure: a second hinge plate extending inwards is provided on the inner side wall of each right clamp arm, and the second hinge plate is hinged to the right part of the movable plate.

[0011] Furthermore, in the aforementioned unloading mechanism of a bottle blowing machine, the unlocking structure is as follows: the upper end of each left clamping jaw arm is higher than the corresponding first hinge plate, and a first embedding groove is opened inwardly on the outer side wall of each left clamping jaw arm higher than the corresponding first hinge plate, and the angle between the upper groove surface of the first embedding groove and the groove bottom of the first embedding groove is greater than 90°; the upper end of each right clamping jaw arm is higher than the corresponding second hinge plate, and a second embedding groove is opened inwardly on the outer side wall of each right clamping jaw arm higher than the corresponding second hinge plate, and the angle between the upper groove surface of the second embedding groove and the groove bottom of the second embedding groove is greater than 90°. The angle is greater than 90°; a left extension arm is provided at the left end of the fixed frame, which extends downward and corresponds to the number and position of each left clamping claw arm, and a first side hinge seat with a first limiting platform is fixedly installed on the inner side wall of each left extension arm, and a first limiting flip block on the first side hinge seat above the first limiting platform is provided on each first side hinge seat, and a first torsion spring is sleeved on the first hinge pin. Under the elastic force of the first torsion spring, the first limiting flip block swings around the first hinge pin to abut against the first limiting platform, and the first limiting The positioning flip block is in a horizontal position; a right extension arm is arranged at the right end of the fixing frame, which extends downward and corresponds to the number and position of each right clamping claw arm; a second side hinge seat with a second limiting platform is fixedly installed on the inner side wall of each right extension arm; a second limiting flip block on the second side hinge seat above the second limiting platform is hingedly connected to the second limiting platform through a second hinge pin is arranged on each second side hinge seat; a second torsion spring is mounted on the second hinge pin; under the elastic force of the second torsion spring, the second limiting flip block swings around the second hinge pin to abut against the second limiting platform, and The second limit flap is in a horizontal position; the distance between the first limit flap resting on the first limit platform and the second limit flap resting on the second limit platform is less than the distance between the upper outer wall of the left clamp arm and the upper outer arm of the right clamp arm when the left half clamp and the right half clamp are in a closed clamping state; and the distance between the first limit flap resting on the first limit platform and the second limit flap resting on the second limit platform is greater than or equal to the distance between the bottom of the first embedded groove and the bottom of the second embedded groove when the left half clamp and the right half clamp are in a closed clamping state.

[0012] Furthermore, in the aforementioned unloading mechanism of a bottle blowing machine, the right end face of the first limit flap abutting against the first limit platform is a first arc surface, and the curvature of the first arc surface is convex to the lower right; the left end face of the second limit flap abutting against the second limit platform is a second arc surface, and the curvature of the second arc surface is convex to the lower left. The advantage of such a setting is that when the left clamp arm and the right clamp arm located below the first limit flap and the second limit flap move upward under the drive of the driving structure, the outer side of the upper end of the left clamp arm contacts the first arc surface, and the outer side of the upper end of the right clamp arm contacts the second arc surface, so that the first limit flap and the second limit flap can be pushed upward more smoothly without problems such as jamming and blocking, thereby ensuring that the left half clamp and the right half clamp in the closed clamping state can smoothly pass through the area where the first limit flap and the second limit flap are located.

[0013] Furthermore, in the aforementioned unloading mechanism of a bottle blowing machine, the driving structure is a cylinder, the cylinder body of the cylinder is vertically fixed on a fixed frame, the driving member of the driving structure is an extension rod of the cylinder pointing downward, and the upper part of the connecting rod is fixedly connected to the extension rod of the cylinder.

[0014] Furthermore, in the aforementioned unloading mechanism of a bottle blowing machine, at least one guide structure is arranged between the fixed frame and the movable plate; the guide structure is as follows: a guide sleeve is vertically fixedly arranged on the fixed frame, a through hole is opened on the fixed frame opposite to the inner hole of the guide sleeve, and the lower end of the sliding shaft is inserted into the guide sleeve from the top of the guide sleeve, and then passes through the through hole and is fixedly connected to the movable plate; when the movable plate moves upward or downward under the drive of the driving structure, each sliding shaft moves upward or downward synchronously in the corresponding guide sleeve. Usually, the number of guide structures is set to two, and the two guide structures are arranged symmetrically with respect to the cylinder. The setting of the guide structure ensures that the movable plate can rise or fall smoothly under the drive of the driving structure without shaking, getting stuck, or other problems.

[0015] Furthermore, in the aforementioned unloading mechanism of a bottle blowing machine, the reset mechanism is as follows: an annular groove is cut inwardly on the inner hole wall of the lower section of the cylinder, an axial ring extending into the annular groove is arranged on the plug-in rod, and a reset spring is sleeved on the plug-in rod, and the upper end of the reset spring abuts against the upper groove surface of the annular groove, and the lower end of the reset spring abuts against the axial ring.

[0016] The beneficial effects of the present invention are as follows: the preform unloading mechanism of the bottle blowing machine with the above structure has the advantages of simple structure, convenient maintenance, low manufacturing cost, and the ability to smoothly pull the preform insertion head out of the softened bottle preform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural schematic diagram of a preform unloading mechanism of a bottle blowing machine.

[0018] Figure 2 is Figure 1 A schematic diagram of the state in which the driving structure drives the connecting rod to move downward, forcing the left half clamping jaw and the right half clamping jaw to open to both sides respectively.

[0019] Figure 3 is Figure 2 Schematic diagram of the state after the driving structure continues to drive the connecting rod to move downward, causing the left half clamping jaw and the right half clamping jaw to return to the closed clamping state.

[0020] Figure 4 is Figure 3 A schematic diagram of the state when the driving structure at the position drives the connecting rod to move upward, forcing the first limit flip block and the second limit flip block to flip upward.

[0021] Figure 5 It is a structural schematic diagram of the blank insertion head mechanism.

[0022] Figure 6 is from Figure 1 Schematic diagram of the local structure from the left view direction. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0024] Embodiment 1

[0025] For the convenience of description, the terms "front", "back", "left", "right", "up", and "down" in this solution are based on the following definitions: Figure 1 The left-hand direction is defined as "left", located at Figure 1 The right-hand direction is defined as "right", located at Figure 1 The direction above is defined as "up", located at Figure 1 The direction below is defined as "down", which is the same as the previously defined "left", "right", "up", and "down". Figure 6 The left-hand direction is defined as "front", located at Figure 6 The right-hand direction is defined as "back". All directional words involved in this scheme are based on this.

[0026] See also Figure 5 and Figure 6As shown, on the blow molding machine, a plurality of blank insertion head mechanisms 60 are evenly spaced and fixedly arranged on the conveying chain 40 of the blow molding machine, and a plurality of manipulators 50 are fixedly arranged in the blank unloading area of ​​the blow molding machine. Each manipulator 50 is evenly spaced and arranged like each blank insertion head mechanism 60, and the arrangement spacing between each manipulator 50 is consistent with the arrangement spacing between each blank insertion head mechanism 60. In the process of the conveying chain 40 driving each blank insertion head mechanism 60 to be transported from back to front, each blank insertion head mechanism 60 will pass through the blank unloading area of ​​the blow molding machine. When any blank insertion head mechanism 60 located in the blank unloading area is in a corresponding position with any manipulator 50 up and down, the manipulator 50 can be located in the blank insertion head mechanism 60 above it. This is the existing structure of the blow molding machine. This scheme improves the blank insertion head mechanism 60 on this basis, and designs the blank unloading mechanism of the blow molding machine described in this scheme in combination with the improved blank insertion head mechanism and manipulator.

[0027] like Figure 1 As shown, a blank unloading mechanism of a blow molding machine described in this embodiment includes: a plurality of blank insertion head mechanisms 60 fixed on the conveying chain 40 of the blow molding machine, and a manipulator 50 fixed in the blank unloading area of ​​the blow molding machine, and the number of the manipulator 50 is at least one. The arrangement spacing between the manipulators 50 is consistent with the arrangement spacing between the blank insertion head mechanisms 60, and the manipulators 50 are below the blank insertion head mechanisms 60 in the blank unloading area. A fixed frame 1 is fixedly provided in the blank unloading area of ​​the blow molding machine, and the fixed frame 1 is above the blank insertion head mechanisms 60 in the blank unloading area. A driving structure is installed on the fixed frame 1, and a connecting rod 5 is vertically fixedly installed on the driving member of the driving structure, and the connecting rod 5 can move downward or upward under the drive of the driving structure.

[0028] There are many kinds of driving structures on the market, and any driving structure that can achieve the function of driving the connecting rod 5 to rise to the desired position and maintain it at the position, or to descend to the desired position and maintain it at the position can be used. However, considering the compactness, practicality, economy, ease of operation, and easy maintenance of the overall structure, the driving structure in this solution adopts a cylinder 4, such as Figure 1 and Figure 2 As shown, the cylinder body 41 of the cylinder 4 is vertically fixedly installed on the fixing frame 1, the driving member of the driving structure is the extension rod 42 of the cylinder 4 pointing downward, and the upper part of the connecting rod 5 is fixedly connected to the extension rod 42 of the cylinder 4. When the extension rod 42 of the cylinder 4 extends downward, the connecting rod 5 is driven to move downward, and when the extension rod 42 of the cylinder 4 retracts upward, the connecting rod 5 is driven to move upward.

[0029] like Figure 1 and Figure 2As shown, a movable plate 6 is fixedly installed at the lower end of the connecting rod 5, the left clamp arm 22 of the left half clamp 2 is hinged to the left part of the movable plate 6, and the right clamp arm 32 of the right half clamp 3 is hinged to the right part of the movable plate 6. A locking structure for placing the left half clamp 2 and the right half clamp 3 in a closed clamping state is provided between the left half clamp 2 and the right half clamp 3, and an unlocking structure for unlocking the locking structure and opening the left half clamp 2 and the right half clamp 3 to both sides is also provided between the fixed frame 1 and the left half clamp 2 and the right half clamp 3. When the unlocking structure is not intervened, the left half clamp 2 and the right half clamp 3 are always in a closed clamping state under the action of the locking structure. When the unlocking structure intervenes, the locking structure is locked and contacted, and the left half clamp 2 and the right half clamp 3 are opened to both sides respectively.

[0030] like Figure 5 As shown, the structure of each blank insertion head mechanism 60 includes: a cylinder 606 vertically fixedly mounted on the conveying chain 40, an insertion rod 603 movably inserted into the cylinder 606, a clamping portion 601 for closing and clamping the left half jaw 2 and the right half jaw 3 is provided on the insertion rod 603 extending out of the upper end of the cylinder 606, and an insertion head 602 is fixedly provided at the lower end of the insertion rod 603, and the lower end of the insertion head 602 extends out of the lower end of the cylinder 606. After the left half jaw 2 and the right half jaw 3 clamp the clamping part 601 of the plug-in rod 603, the driving structure drives the connecting rod to move upward, driving the left half jaw 2 and the right half jaw 3 in the closed clamping state to move upward, thereby pulling the plug-in rod 603 upward, and a reset mechanism is provided between the cylinder 606 and the plug-in rod 603, and the left half jaw 2 and the right half jaw 3 open to both sides respectively. After the clamping part 601 of the plug-in rod 603 is released, the plug-in rod 603 returns downward to the position when it is not pulled up under the action of the reset mechanism.

[0031] There are many types of reset mechanisms on the market, and any reset mechanism that can realize the function of restoring the plug-in rod 603 that is not subjected to external force and is in the pulled-out state to the unpulled position can be used. However, considering the compactness, practicality, economy, simplicity of operation, and ease of maintenance of the overall structure, the reset mechanism in this solution adopts the following structure: Figure 5As shown, an annular groove 608 is cut inwardly on the inner hole wall of the lower section of the cylinder 606, and a collar 607 extending into the annular groove 608 is arranged on the plug-in rod 603. The collar 607 can be made of an integral molding with the plug-in rod 603, or it can be a split splicing structure. The reset spring 605 is sleeved on the plug-in rod 603, and the upper end of the reset spring 605 abuts on the upper groove surface of the annular groove 608, and the lower end of the reset spring 605 abuts on the collar 607. Under the elastic force of the reset spring 605, the plug-in rod 603 in the pulled-out state without external force will move downward until the collar 607 abuts against the lower groove surface of the annular groove 608 again. At this time, the plug-in rod 603 is in the position when it is not pulled out. In the process of the plug-in rod 603 being pulled up by external force, the collar 607 is driven to move upward, and the compression force of the reset spring 605 gradually increases from the initial compression force.

[0032] The blank unloading mechanism of the bottle blowing machine of the above structure has the advantages of simple structure, convenient maintenance, low manufacturing cost, and the ability to smoothly pull the blank insertion head 602 out of the softened bottle blank 10.

[0033] Embodiment 2

[0034] This embodiment is based on the locking structure of the first embodiment. The locking structure described in this embodiment uses a front tension spring 92 and a rear tension spring 91. Figure 1 and Figure 6 As shown, the left end of the front tension spring 92 is fixedly mounted on the front side wall of the left clamp arm 22, and the right end of the front tension spring 92 is fixedly mounted on the front side wall of the right clamp arm 32. The left end of the rear tension spring 91 is fixedly mounted on the rear side wall of the left clamp arm 22, and the right end of the rear tension spring 92 is fixedly mounted on the rear side wall of the right clamp arm 32. And the front tension spring 92 and the rear tension spring 91 are both located below the hinge point between the left clamp arm 22 and the movable plate 6, and the hinge point between the right clamp arm 32 and the movable plate 6. Under the elastic force of the front tension spring 92 and the rear tension spring 91, the left half-jaw 2 swings inwards around the hinge point between the left clamp arm 22 and the movable plate 6, and the right half-jaw 3 swings inwards around the hinge point between the right clamp arm 32 and the movable plate 6, thereby locking the left half-jaw 2 and the right half-jaw 3 in a closed clamping state.

[0035] In order to achieve the purpose of clamping a plurality of sequentially arranged clamping parts 601 on the blank insertion head mechanism 60 at one time, the claw hook 21 of the left half clamping jaw 2 and the claw hook 31 of the right half clamping jaw 3 are both set as a support bar structure placed horizontally from front to back, and the length of the support bar structure determines the number of clamping parts 601 on the blank insertion head mechanism 60 that can be grasped at one time by the left half clamping jaw 2 and the right half clamping jaw 3. Of course, the number of manipulators 50 is also consistent with the number of clamping parts 601 on the blank insertion head mechanism 60 that can be clamped at one time by the left half clamping jaw 2 and the right half clamping jaw 3.

[0036] For example: the number of clamping parts 601 on the blank insertion head mechanism 60 clamped by the left half clamp 2 and the right half clamp 3 at one time is five, then the number of corresponding manipulators 50 is also five. When the five blank insertion head mechanisms 60 moved to the blank unloading area through the conveying chain 40 correspond to the positions of the manipulators 50 one by one, the five manipulators 50 respectively clamp the blanks 10 on the blank insertion heads 602 of the corresponding five blank insertion head mechanisms 60. At this time, the driving structure drives the connecting rod 5 to move downward until the left half clamp 2 and the right half clamp 3 clamp the clamping parts 601 on the five blank insertion head mechanisms 60. Then the driving structure drives the connecting rod 5 to move upward, driving the left half clamp 2 and the right half clamp 3 to clamp the clamping parts 601 on the five blank insertion head mechanisms 60 and move upward, and pull the blank heads 602 in the five blank insertion head mechanisms 60 out of the corresponding bottle blanks 10.

[0037] There is at least one left clamp arm 22 and at least one right clamp arm 23 , and the number of the left clamp arm 22 and the right clamp arm 23 are the same, and the positions of the left clamp arm 22 and the right clamp arm 23 are symmetrically distributed relative to the vertical center plane of the movable plate 6 .

[0038] When there are two or more left clamping jaw arms 22, there is one front tension spring 92, and the front tension spring 92 is located on the front side wall of the frontmost left clamping jaw arm 22 and the front side wall of the frontmost right clamping jaw arm 32. There is one rear tension spring 91, and the rear tension spring 91 is located on the rear side wall of the rearmost left clamping jaw arm 22 and the rear side wall of the rearmost right clamping jaw arm 32. When the left half-jaw 2 and the right half-jaw 3 are in the closed clamping state, the compression forces of the front tension spring 92 and the rear tension spring 91 are the same, so that the stability of the clamping of the left half-jaw 2 and the right half-jaw 3 can be ensured.

[0039] Embodiment 3

[0040] This embodiment expands and elaborates on the unlocking structure based on the second embodiment.

[0041] First, each left clamping claw arm 22 is hinged to the left portion of the moving plate 6 in the following manner: Figure 1 and Figure 2As shown, a first hinge plate 24 extending inward is provided on the inner side wall of each left clamp arm 22, and the first hinge plate 24 is hinged to the left part of the movable plate 6. The structure in which each right clamp arm 32 is hinged to the right part of the movable plate 6 is as follows: a second hinge plate 34 extending inward is provided on the inner side wall of each right clamp arm 32, and the second hinge plate 34 is hinged to the right part of the movable plate 6. Under the elastic force of the front tension spring 92 and the rear tension spring 91, the left half-jaw 2 swings inward around the hinge point a between the left clamp arm 22 and the movable plate 6, and the right half-jaw 3 swings inward around the hinge point b between the right clamp arm 32 and the movable plate 6, thereby achieving the purpose of the left half-jaw 2 and the right half-jaw 3 being in a closed clamping state.

[0042] The unlocking structure described in this embodiment is as follows: Figure 1 and Figure 3As shown, the upper end of each left clamp arm 22 is higher than the corresponding first hinge plate 24, and a first embedding groove 23 is opened inwardly on the outer side wall of each left clamp arm 22 higher than the corresponding first hinge plate 24, and the angle between the upper groove surface 231 of the first embedding groove 23 and the groove bottom 232 of the first embedding groove is greater than 90°. The upper end of each right clamp arm 32 is higher than the corresponding second hinge plate 34, and a second embedding groove 33 is opened inwardly on the outer side wall of each right clamp arm 32 higher than the corresponding second hinge plate 34, and the angle between the upper groove surface 331 of the second embedding groove 33 and the groove bottom 332 of the second embedding groove 33 is greater than 90°. A left extension arm 11 is provided at the left end of the fixing frame 1, which extends downward and corresponds to the number and position of each left clamping claw arm 22. A first side hinge seat 7 with a first limiting platform 71 is fixedly installed on the inner side wall of each left extension arm 11. A first limiting flip block 73 on the first side hinge seat 7 above the first limiting platform 71 is provided on each first side hinge seat 7. A first hinge pin 74 is hinged to the first limiting platform 71. A first torsion spring 72 is mounted on the first hinge pin 74. One end of the first torsion spring 72 abuts against the first side hinge seat 7, and the other end of the first torsion spring 72 abuts against the first limiting flip block 73. Under the elastic force of the first torsion spring 72, the first limiting flip block 73 swings around the first hinge pin 74 to abut against the first limiting platform 71. At this time, the first limiting flip block 73 is in a horizontal position. A right extension arm 12 is provided at the right end of the fixing frame 1, which extends downward and corresponds to the number and position of each right clamping claw arm 32. A second side hinge seat 8 with a second limiting platform 81 is fixedly installed on the inner wall of each right extension arm 12. A second limiting flap 83 on the second side hinge seat 8 above the second limiting platform 81 is provided on each second side hinge seat 8. A second hinge pin 84 is hinged to the second limiting platform 81. A second torsion spring 82 is mounted on the second hinge pin 84. One end of the second torsion spring 82 abuts against the second side hinge seat 8, and the other end of the second torsion spring 82 abuts against the second limiting flap 83. Under the elastic force of the second torsion spring 82, the second limiting flap 83 swings around the second hinge pin 84 to abut against the second limiting platform 81. At this time, the second limiting flap 83 is in a horizontal position.

[0043] The distance between the first limit flip block 73 abutting against the first limit platform 71 and the second limit flip block 83 abutting against the second limit platform 81 is less than the distance between the upper outer wall of the left clamp arm 22 and the upper outer arm of the right clamp arm 23 when the left half clamp 2 and the right half clamp 3 are in the closed clamping state. And the distance between the first limit flip block 73 abutting against the first limit platform 71 and the second limit flip block 83 abutting against the second limit platform 81 is greater than or equal to the distance between the groove bottom 232 of the first embedded groove 23 and the groove bottom 332 of the second embedded groove 33 when the left half clamp 2 and the right half clamp 3 are in the closed clamping state.

[0044] The right end surface of the first limit flap 73 abutting against the first limit platform 71 is a first arc surface 731, and the curvature of the first arc surface 731 is convex to the lower right. The left end surface of the second limit flap 83 abutting against the second limit platform 82 is a second arc surface 831, and the curvature of the second arc surface 831 is convex to the lower left.

[0045] like Figure 1 The figure shows that the left half jaw 2 and the right half jaw 3 are in the initial position, and the distance between the first limit flap 73 resting on the first limit platform 71 and the second limit flap 83 resting on the second limit platform 81 is greater than or equal to the distance between the bottom 232 of the first embedding groove 23 and the bottom 332 of the second embedding groove 33 when the left half jaw 2 and the right half jaw 3 are in the closed clamping state, so at this time the first limit flap 73 and the second limit flap 83 have no force on the left jaw arm 22 and the right jaw arm 32.

[0046] In this embodiment, the number of clamping parts 601 on the blank insertion head mechanism 60 clamped by the left half clamping jaw 2 and the right half clamping jaw 3 at one time is taken as an example, and the number of the manipulator 50 is also one. When a blank insertion head mechanism 60 moved to the bottom of the left half clamping jaw 2 and the right half clamping jaw 3 by the conveying chain 40 corresponds to the position of the manipulator 50, the manipulator 50 clamps the blank 10 on the blank insertion head 602 of the corresponding blank insertion head mechanism 60, such as Figure 1 shown.

[0047] When the driving structure drives the connecting rod 5 to move downward, the left clamp arm 22 moves downward relative to the first limit flap 73 in the horizontal position, so that the first limit flap 73 is subjected to a downward force and is always in the horizontal position, and will not flip up. Similarly, the right clamp arm 32 moves downward relative to the second limit flap 83 in the horizontal position, so that the second limit flap 83 is subjected to a downward force and is always in the horizontal position, and will not flip up. When the left clamp arm 22 moves to the point where the first limit flap 73 contacts the upper groove surface 231 of the first embedded groove 23, the right clamp arm 32 also moves to the point where the second limit flap 83 contacts the upper groove surface 331 of the second embedded groove 33. As the left clamp arm 22 and the right clamp arm 32 continue to move downward, the distance from the upper groove surface 231 of the first embedded groove 23 in contact with the first limit flap 73 to the upper groove surface 331 of the second embedded groove 33 in contact with the second limit flap 83 increases with the movement of the left clamp arm 22 and the right clamp arm 32. The right clamp arm 32 continues to move downward and gradually increases, while the distance between the first limit flip block 73 in the horizontal swing position and the second limit flip block 83 in the horizontal placement position remains unchanged, which forces the left clamp arm 22 in contact with the first limit flip block 73 to swing inward, and the right clamp arm 32 in contact with the second limit flip block 83 to swing inward as well. At this time, the left half clamp 2 and the right half clamp 3 overcome the spring force of the front tension spring 92 and the rear tension spring 91 and open to both sides respectively, as shown in FIG. Figure 2 shown.

[0048] When the left half jaw 2 and the right half jaw 3 move to the clamping part 601 on the insertion head mechanism 60, the upper end of the left jaw arm 22 contacts the first limit flap 73, and the upper end of the right jaw arm 32 contacts the second limit flap 83. At this time, the opening angle of the left half jaw 2 and the right half jaw 3 is the largest. When the driving structure drives the connecting rod 5 to continue to move downward, at this time, the left clamping jaw arm 22 disengages from the first limit flip block 73, and the right clamping jaw arm 32 disengages from the second limit flip block 83. Under the elastic force of the front tension spring 92 and the rear tension spring 91, the left half clamping jaw 2 and the right half clamping jaw 3 swing inward around the hinge point between the left clamping jaw arm 22 and the movable plate 6, and the right half clamping jaw 3 swings inward around the hinge point between the right clamping jaw arm 32 and the movable plate 6, and returns to the closed clamping state. At this time, the left half clamping jaw 2 and the right half clamping jaw 3 firmly clamp the clamping portion 601 on the blank insertion head mechanism 60. Figure 3 shown.

[0049] Then the driving structure drives the connecting rod 5 to move upward. When the upper end of the left clamping jaw arm 22 contacts the first limit flip block 73 and the upper end of the clamping jaw arm 32 contacts the second limit flip block 83, the driving structure continues to drive the connecting rod 5 to move upward. The first limit flip block 73 and the second limit flip block 83 are subjected to an upward force, so that the first limit flip block 73 overcomes the elastic force of the first torsion spring 72 and flips upward, and the second limit flip block 83 overcomes the elastic force of the second torsion spring 82 and flips upward, so that the left half clamping jaw 2 and the right half clamping jaw 3 in the closed clamping state can smoothly pass through the area where the first limit flip block 73 and the second limit flip block 83 are located. Figure 4 shown.

[0050] In this way, the preform 10 can be mechanically separated from the inserting head 602 by force, so that the bottle blowing machine can completely eliminate the malfunction caused by the inability of the preform 10 to separate from the inserting head 602.

[0051] Embodiment 4

[0052] This embodiment is based on the first embodiment, the second embodiment or the third embodiment, and a guide structure is added: at least one guide structure is provided between the fixed frame 1 and the movable plate 6. Figure 6 As shown, the guide structure is as follows: a guide sleeve 20 is vertically fixed on the fixed frame 1, a through hole is opened on the fixed frame 1 opposite to the inner hole of the guide sleeve 20, and the lower end of the sliding shaft 30 is inserted into the guide sleeve 20 from the top of the guide sleeve 20, and then passes through the through hole and is fixedly connected to the movable plate 6.

[0053] When the movable plate 6 moves upward or downward under the driving structure, each sliding shaft 30 moves upward or downward synchronously in the corresponding guide sleeve 20. Usually, there are two guide structures, which are symmetrically arranged front and back relative to the cylinder 4. The arrangement of the guide structures ensures that the movable plate 6 can be smoothly raised or lowered under the driving structure without shaking, getting stuck or other problems.

[0054] The above description is only a preferred embodiment of the present invention and does not constitute any other form of limitation to the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.

Claims

1. A preform unloading mechanism for a bottle blowing machine, comprising: A plurality of blank insertion head mechanisms fixed on the conveying chain of the blow molding machine, and a manipulator fixed in the blank unloading area of ​​the blow molding machine, the number of the manipulator is at least one, the arrangement spacing between the manipulators is consistent with the arrangement spacing between the blank insertion head mechanisms, and the manipulators are below the blank insertion head mechanisms in the blank unloading area; it is characterized in that: a fixed frame is fixedly arranged in the blank unloading area of ​​the blow molding machine, the fixed frame is above the blank insertion head mechanisms in the blank unloading area, a driving structure is installed on the fixed frame, a connecting rod is vertically fixedly installed on the driving member of the driving structure, and the connecting rod can move downward or upward under the drive of the driving structure; a movable plate is fixedly installed at the lower end of the connecting rod, the left clamping jaw arm of the left half clamping jaw is hinged to the left part of the movable plate, and the right clamping jaw arm of the right half clamping jaw is hinged to the right part of the movable plate, A locking structure is provided between the left half-jaw and the right half-jaw to keep the left half-jaw and the right half-jaw in a closed clamping state, and an unlocking structure is also provided between the fixed frame and the left half-jaw and the right half-jaw to unlock the locking structure and open the left half-jaw and the right half-jaw to both sides respectively; the structure of each blank insertion head mechanism comprises: a cylinder body vertically fixedly mounted on the conveying chain, an insertion and extraction rod movably inserted into the cylinder body, a clamping portion for closing and clamping the left half-jaw and the right half-jaw is provided on the insertion and extraction rod extending out of the upper end of the cylinder body, an insertion and extraction head is fixedly provided at the lower end of the insertion and extraction rod, and the lower end of the insertion and extraction head extends out of the lower end of the cylinder body, and a reset mechanism is provided between the cylinder body and the insertion and extraction rod to enable the insertion and extraction rod, which is clamped and pulled up by the left half-jaw and the right half-jaw, to automatically return downward to a non-pulled position after the left half-jaw and the right half-jaw are opened; The structure in which each left clamping jaw arm is hinged to the left part of the movable plate is as follows: a first hinge plate extending inwardly is provided on the inner side wall of each left clamping jaw arm, and the first hinge plate is hinged to the left part of the movable plate; the structure in which each right clamping jaw arm is hinged to the right part of the movable plate is as follows: a second hinge plate extending inwardly is provided on the inner side wall of each right clamping jaw arm, and the second hinge plate is hinged to the right part of the movable plate; The unlocking structure is as follows: the upper end of each left clamping claw arm is higher than the corresponding first hinge plate, and a first embedding groove is opened inwardly on the outer side wall of each left clamping claw arm higher than the corresponding first hinge plate, and the angle between the upper groove surface of the first embedding groove and the groove bottom of the first embedding groove is greater than 90°; the upper end of each right clamping claw arm is higher than the corresponding second hinge plate, and a second embedding groove is opened inwardly on the outer side wall of each right clamping claw arm higher than the corresponding second hinge plate, and the angle between the upper groove surface of the second embedding groove and the groove bottom of the second embedding groove is greater than 90°; on the left side of the fixing frame, A left extension arm is provided at the end thereof, which extends downward and corresponds to the number and position of each left clamping claw arm. A first side hinge seat with a first limiting platform is fixedly installed on the inner side wall of each left extension arm. A first limiting flip block on the first side hinge seat above the first limiting platform is hingedly connected to the first side hinge seat through a first hinge pin. A first torsion spring is mounted on the first hinge pin. Under the elastic force of the first torsion spring, the first limiting flip block swings around the first hinge pin to abut against the first limiting platform, and the first limiting flip block is in a horizontal position. The fixing frame is provided with a right extension arm extending downward and corresponding to the number and position of each right clamping claw arm one by one at the right end, and a second side hinge seat with a second limiting platform is fixedly installed on the inner side wall of each right extension arm, and a second limiting flip block on the second side hinge seat above the second limiting platform is hingedly connected to the second limiting platform through a second hinge pin is provided on each second side hinge seat, and a second torsion spring is sleeved on the second hinge pin, and under the elastic force of the second torsion spring, the second limiting flip block swings around the second hinge pin to abut against the second limiting platform, and the second limiting flip block The block is in a horizontal placement position; the distance between the first limit flip block abutting against the first limit platform and the second limit flip block abutting against the second limit platform is less than the distance between the outer side wall of the upper end of the left clamp arm and the outer side arm of the upper end of the right clamp arm when the left half clamp and the right half clamp are in a closed clamping state; and the distance between the first limit flip block abutting against the first limit platform and the second limit flip block abutting against the second limit platform is greater than or equal to the distance between the bottom of the first embedded groove and the bottom of the second embedded groove when the left half clamp and the right half clamp are in a closed clamping state; The reset mechanism is as follows: an annular groove is cut inwardly on the inner hole wall of the lower section of the cylinder, a shaft ring extending into the annular groove is arranged on the plug-in rod, a reset spring is sleeved on the plug-in rod, and the upper end of the reset spring abuts against the upper groove surface of the annular groove, and the lower end of the reset spring abuts against the shaft ring.

2. A preform unloading mechanism for a bottle blowing machine according to claim 1, characterized in that: The locking structure is as follows: the left end of the front tension spring is fixedly mounted on the front side wall of the left clamping jaw arm, and the right end of the front tension spring is fixedly mounted on the front side wall of the right clamping jaw arm; the left end of the rear tension spring is fixedly mounted on the rear side wall of the left clamping jaw arm, and the right end of the rear tension spring is fixedly mounted on the rear side wall of the right clamping jaw arm; and the front tension spring and the rear tension spring are both located below the hinge point between the left clamping jaw arm and the movable plate, and the hinge point between the right clamping jaw arm and the movable plate; under the elastic force of the front tension spring and the rear tension spring, the left half clamping jaw swings inward around the hinge point between the left clamping jaw arm and the movable plate, and the right half clamping jaw swings inward around the hinge point between the right clamping jaw arm and the movable plate, so that the left half clamping jaw and the right half clamping jaw are in a closed clamping state.

3. A preform unloading mechanism for a bottle blowing machine according to claim 2, characterized in that: The claw hooks of the left half clamp and the right half clamp are both support bar structures placed horizontally from front to back, the number of left clamp arms is at least one, the number of right clamp arms is at least one, the number of left clamp arms and right clamp arms is the same, and the positions of the left clamp arms and the right clamp arms are symmetrically distributed relative to the vertical center plane of the movable plate.

4. A preform unloading mechanism for a bottle blowing machine according to claim 3, characterized in that: When there are more than two left clamp arms, there is one front tension spring, which is located on the front side wall of the frontmost left clamp arm and the front side wall of the frontmost right clamp arm; there is one rear tension spring, which is located on the rear side wall of the rearmost left clamp arm and the rear side wall of the rearmost right clamp arm.

5. A preform unloading mechanism for a bottle blowing machine according to claim 3 or 4, characterized in that: The right end face of the first limit flap resting on the first limit platform is a first arc surface, and the curvature of the first arc surface is convex to the lower right; the left end face of the second limit flap resting on the second limit platform is a second arc surface, and the curvature of the second arc surface is convex to the lower left.

6. A preform unloading mechanism for a bottle blowing machine according to claim 1, characterized in that: The driving structure is a cylinder, the cylinder body of which is vertically fixed on a fixing frame, the driving member of the driving structure is an extension rod of the cylinder pointing downward, and the upper part of the connecting rod is fixedly connected to the extension rod of the cylinder.

7. A preform unloading mechanism for a bottle blowing machine according to claim 1 or 6, characterized in that: At least one guide structure is arranged between the fixed frame and the movable plate; the guide structure is as follows: a guide sleeve is vertically fixedly arranged on the fixed frame, a through hole penetrating from top to bottom is opened on the fixed frame opposite to the inner hole of the guide sleeve, the lower end of the sliding shaft is inserted into the guide sleeve from the top of the guide sleeve, and then passes through the through hole and is fixedly connected to the movable plate; when the movable plate moves upward or downward under the drive of the driving structure, each sliding shaft moves upward or downward synchronously in the corresponding guide sleeve.

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