Injection molding machine manual safety door capable of being opened and closed by one hand

Abstract

The injection molding machine manual safety door capable of being opened and closed by one hand comprises a door frame and a door plate in sliding connection with the door frame, a handle is arranged on the front side of the door plate, and a lock groove is formed in the door frame; a lock tongue clamped with the lock groove is arranged on the rear side of the door plate; a driving rod is arranged on the inner side of the handle holding part; the driving rod rotates to drive the lock tongue to be clamped with or separated from the lock groove; when the driving rod rotates in the hand holding direction, the lock tongue is separated from the lock groove; and when the hand is separated from the driving rod, the driving rod resets under the action of the spring. According to the arrangement, the handle and the driving rod can be held by a single hand at the same time, the palm abuts against the handle, the driving rod is held by taking the handle as a fulcrum, the spring bolt can be separated from the lock groove, when the driving rod is loosened, the driving rod resets under the action of the spring and is automatically clamped with the lock groove, and therefore operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a manual safety door of an injection molding machine which can be opened and closed by one hand. Background Art

[0002] The loading and unloading stations of the injection molding machine will be equipped with safety doors to ensure safe loading and unloading.

[0003] Safety doors usually require two hands to open and close, with one hand holding the handle on the door and the other hand unlocking or locking the door. Workers usually have tools on hand, which makes it very difficult to open and close safety doors.

[0004] Therefore, how to realize single-handed opening and closing of the safety door has become a problem to be solved urgently by those skilled in the art. Utility Model Content

[0005] In order to solve the technical problems in the background technology, the utility model discloses a manual safety door for an injection molding machine which can be opened and closed by one hand.

[0006] The utility model provides a manual safety door for an injection molding machine which can be opened and closed with one hand, comprising a door frame and a door panel slidably connected to the door frame, a handle is arranged on the front side of the door panel, and a lock slot is arranged on the door frame;

[0007] A lock tongue engaging with a lock groove is arranged at the rear side of the door panel;

[0008] A driving rod is arranged on the inner side of the handle grip;

[0009] The driving rod is hinged to the door panel, and the locking tongue is driven to engage or disengage from the locking slot by the rotation of the driving rod;

[0010] When the driving rod rotates in the direction of the hand holding, the lock tongue is separated from the lock groove;

[0011] When the human hand is released from the driving rod, the driving rod is reset under the action of the spring.

[0012] With the above arrangement, one hand can hold the handle and the driving rod at the same time, and the palm of the hand is against the handle, and the driving rod is held with the handle as a fulcrum, so that the lock tongue can be disengaged from the lock slot. When the driving rod is released, the driving rod is reset under the action of the spring and automatically engages the lock slot. This operation is simple and convenient.

[0013] The specific structure of the driving rod hinge is: a vertically arranged hinge shaft is provided on the door panel; two ends of the driving rod are fixedly connected to two ends of the hinge shaft; and the lock tongue is fixedly installed on the hinge shaft.

[0014] The specific installation structure of the driving rod and the spring is: a vertically connected connecting shaft is arranged on the inner side of the door panel; the spring is sleeved on the connecting shaft; the lock tongue is sleeved on the connecting shaft so that the spring is located between the door panel and the lock tongue.

[0015] If the end of the driving rod passes through the door panel and is connected to the hinge shaft, the connection is difficult. Based on this, further improvements are: the two ends of the driving rod are vertically led out of the connecting rod; the two ends of the hinge shaft are provided with convex plates; the convex plate part protrudes from the front side of the door panel; the part of the convex plate protruding from the front side of the door panel is fixedly connected to the connecting rod.

[0016] The connecting rod, the convex plate and the hinge shaft are generally connected by welding, which is cumbersome to operate and not conducive to disassembly. Based on this, a further design is: the convex plate is sleeved on the hinge shaft; the fastening bolt passes through the convex plate and the hinge shaft and is threadedly connected to the connecting rod.

[0017] The articulated shaft is generally connected in rotation by a bearing with a seat. The cost of the bearing with a seat is relatively high. Based on this, further improvements are made in that two fixed plates arranged up and down are provided on the inner side of the door panel; an oil-free bushing is installed on the fixed plate; and the articulated shaft is inserted into the oil-free bushing.

[0018] The oil-free bushing is directly installed on the fixed plate, the operating space is small, and the disassembly and assembly are difficult. Based on this, a further improvement is that the oil-free bushing is installed on the connecting plate; the connecting plate is connected to the fixed plate by bolts.

[0019] Since the oil-free bushing runs through both sides of the connecting plate, an avoidance hole needs to be opened on the fixed plate to provide installation space for the oil-free bushing, and the articulated shaft needs to move axially for installation; since there are two oil-free bushings on the articulated shaft, installation is difficult. Based on this, further improvements are made in that a U-shaped groove is opened on the fixed plate; the oil-free bushing is inserted into the U-shaped groove. With this arrangement, the articulated shaft can be installed and fixed on the fixed plate by radial movement, which is convenient to operate.

[0020] In order to achieve the oil-free bushing limit, a further design is: an elastic cylindrical pin is inserted radially into the articulated shaft; the outer wall of the elastic cylindrical pin abuts against the limit plate protruding from one end of the oil-free bushing. The elastic cylindrical pin is elastic, which not only facilitates the elastic cylindrical pin to pass through the articulated shaft, but also improves the position stability of the elastic cylindrical pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0024] Figure 3 It is a structural schematic diagram of the utility model from another perspective;

[0025] Figure 4 yes Figure 3The enlarged view of point B in the middle;

[0026] Figure 5 yes Figure 4 Enlarged view of point C in the middle;

[0027] Figure 6 It is a structural schematic diagram of the hidden handle of the utility model;

[0028] Figure 7 yes Figure 6 The enlarged view of point D in the middle;

[0029] Figure 8 It is the front view of the utility model;

[0030] Fig. 9 yes Figure 8 Sectional view of EE;

[0031] In the figure: 1. door frame; 2. door panel; 3. handle; 4. lock slot; 5. lock tongue; 6. drive rod; 7. spring; 8. hinge shaft; 9. connecting shaft; 10. fastening bolt; 11. fixing plate; 12. oil-free bushing; 13. connecting plate; 14. U-shaped groove; 15. elastic cylindrical pin; 16. limit plate; 17. limit sensor; 18. drive plate; 61. connecting rod; 62. intermediate rod; 81. convex plate. DETAILED DESCRIPTION

[0032] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0033] like Figure 1-9 As shown, the utility model discloses a manual safety door for an injection molding machine which can be opened and closed with one hand, comprising a door frame 1 and a door panel 2 slidably connected to the door frame 1, and a vertically arranged handle 3 is provided on the front side of the door panel 2 for workers to hold and push the door panel 2 to move.

[0034] A lock plate is provided on the door frame 1, and a lock slot 4 is provided on the lock plate. A lock tongue 5 is provided on the rear side of the door panel 2. The lock tongue 5 is engaged with the lock slot 4 to achieve safety door closing.

[0035] A vertically arranged driving rod 6 is provided inside the gripping part of the handle 3. A hinged hinge shaft 8 is provided inside the door panel 2, and the lock tongue 5 is fixed on the hinge shaft 8 by welding. Both ends of the driving rod 6 are respectively and vertically led out of the intermediate rod 62 and the connecting rod 61, and the connecting rod 61 is fixedly connected to both ends of the hinge shaft 8, so that when the driving rod 6 is rotated, the lock tongue 5 can be driven to engage or disengage from the lock groove 4.

[0036] The hinge shaft 8 is also elastically connected to the door panel 2 through the spring 7, specifically: a vertically connected connecting shaft 9 is arranged inside the door panel 2; the spring 7 is sleeved on the connecting shaft 9; the lock tongue 5 is L-shaped, one end of which is used to engage the lock groove 4, and the other end is sleeved on the connecting shaft 9, so that the spring 7 is located between the door panel 2 and the lock tongue 5. When the door panel 2 is in a closed state, if the driving rod 6 is not subjected to external force, the lock tongue 5 is engaged with the lock groove 4 under the elastic force of the spring 7.

[0037] The specific installation structure of the hinge shaft 8 is as follows: two fixing plates 11 arranged up and down are provided inside the door panel 2, and a U-shaped groove 14 is provided on the side of the fixing plate 11 away from the door panel 2. Oil-free bushings 12 are sleeved at both ends of the hinge shaft 8, and a raised circular convex plate 81 is provided at one end of the oil-free bushing 12, and the other end thereof penetrates the connecting plate 13, so that the hinge shaft 8, the oil-free bushing 12 and the connecting plate 13 are connected as a whole. During installation, the hinge shaft 8 is radially moved so that the connecting plate 13 fits with the fixing plate 11, and is fixed by bolts, so that the hinge shaft 8 is easy to install.

[0038] The hinge shaft 8 is radially plugged with an elastic cylindrical pin 15, the outer wall of which abuts against the limit plate 16 to limit the installation of the oil-free bushing 12. The elastic cylindrical pin 15 is elastic, which not only facilitates the elastic cylindrical pin 15 to pass through the hinge shaft 8, but also improves the position stability of the elastic cylindrical pin 15.

[0039] A limit sensor 17 is installed on the door frame 1 to drive the injection molding machine to open and close. The connecting plate 13 below vertically leads out the drive plate 18 corresponding to the limit sensor 17. When the safety door is closed, the drive plate 18 contacts the limit sensor 17, and the limit sensor 17 connects the injection molding machine start circuit; when the safety door is opened, the drive plate 18 moves away from the limit sensor 17, and the limit sensor 17 disconnects the start circuit to stop the injection molding machine.

[0040] Circular convex plates 81 are provided at both ends of the hinge shaft 8; the convex plate 81 partially protrudes from the front side of the door panel 2, and the protruding portion thereof is in a bad arc shape; the connecting rod 61 is fixedly connected to the portion of the convex plate 81 protruding from the front side of the door panel 2. Such a configuration facilitates the connection of the connecting rod 61 with the hinge shaft 8. The convex plate 81 sleeves the hinge shaft 8; the fastening bolt 10 passes through the convex plate 81 and the hinge shaft 8, and is threadedly connected to the connecting rod 61, so that the hinge shaft 8 and the driving rod 6 are conveniently disassembled and assembled.

[0041] With the above arrangement, one hand can hold the handle 3 and the driving rod 6 at the same time, and the palm of the hand rests against the handle 3, and the driving rod 6 is held with the handle 3 as a fulcrum, so that the lock tongue 5 can be disengaged from the lock slot 4. When the driving rod 6 is released, the driving rod 6 is reset under the action of the spring 7 and automatically engages the lock slot 4. The operation is simple and convenient.

[0042] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A manual safety door for an injection molding machine that can be opened and closed with one hand, comprising a door frame (1) and a door panel (2) slidably connected to the door frame (1), wherein a handle (3) is provided on the front side of the door panel (2), and characterized in that: The door frame (1) is provided with a lock slot (4); The door panel (2) is provided with a lock tongue (5) on the rear side thereof for engaging with the lock groove (4); A driving rod (6) is arranged on the inner side of the gripping portion of the handle (3); The driving rod (6) is hinged to the door panel (2), and the locking tongue (5) is driven to engage with or disengage from the locking groove (4) by the rotation of the driving rod (6); When the driving rod (6) rotates in the direction of the hand holding, the locking tongue (5) is separated from the locking groove (4); When a person's hand is released from the driving rod (6), the driving rod (6) is reset under the action of the spring (7).

2. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 1, characterized in that: The door panel (2) is provided with a vertically arranged hinge shaft (8); The two ends of the driving rod (6) are fixedly connected to the two ends of the hinge shaft (8); The locking tongue (5) is fixedly mounted on the hinge shaft (8).

3. The manual safety door of an injection molding machine that can be opened and closed with one hand according to claim 2, characterized in that: A vertically connected connecting shaft (9) is arranged on the inner side of the door panel (2); The spring (7) is sleeved on the connecting shaft (9); The lock tongue (5) is sleeved on the connecting shaft (9), so that the spring (7) is located between the door panel (2) and the lock tongue (5).

4. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 2, characterized in that: Connecting rods (61) are vertically extended from both ends of the driving rod (6); Both ends of the hinge shaft (8) are provided with convex plates (81); The convex plate (81) partially protrudes from the front side of the door panel (2); The portion of the protruding plate (81) protruding from the front side of the door panel (2) is fixedly connected to the connecting rod (61).

5. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 4, characterized in that: The convex plate (81) is sleeved on the hinge shaft (8); The fastening bolt (10) passes through the convex plate (81) and the hinge shaft (8) and is threadedly connected to the connecting rod (61).

6. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 2, characterized in that: Two fixing plates (11) arranged up and down are provided on the inner side of the door panel (2); An oil-free bushing (12) is installed on the fixing plate (11); The hinge shaft (8) is inserted into the oil-free bushing (12).

7. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 6, characterized in that: The oil-free bushing (12) is mounted on the connecting plate (13); The connecting plate (13) is connected to the fixing plate (11) via bolts.

8. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 7, characterized in that: The fixing plate (11) is provided with a U-shaped groove (14); The oil-free bushing (12) is inserted into the U-shaped groove (14).

9. The manual safety door for an injection molding machine that can be opened and closed with one hand according to claim 8, characterized in that: The hinge shaft (8) is radially plugged with an elastic cylindrical pin (15); The outer side wall of the elastic cylindrical pin (15) abuts against a stopper plate (16) protruding from one end of the oil-free bushing (12).

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