Injection molding machine safety door with hidden damping device

Abstract

The injection molding machine safety door with the hidden damping device comprises a safety door body, guide wheels are arranged on the upper side and the lower side of the safety door body, an upper guide rail and a lower guide rail which are connected with the guide wheels in a clamping mode are arranged on the upper side and the lower side of a machine frame of an injection molding machine respectively, sliding of the safety door body is achieved, and the lower guide rail is a rectangular pipe; a stop block which is elastically connected through a spring is mounted in the lower guide rail; the top of the stop block protrudes out of the upper end face of the lower guide rail. The guide wheel presses down or breaks away from the check block, so that the check block descends or resets. Under the action of the stop block, the power potential energy of the safety door is reduced, so that the impact force on the door frame is reduced; the stop block is hidden in the lower guide rail, only the top of the stop block protrudes out of the lower guide rail upwards, the space of the safety door cannot be occupied, the area of the stop block protruding out of the lower guide rail is small, and the stop block is not prone to being damaged by external force.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machines, in particular to a safety door of an injection molding machine with a hidden damping device. Background Art

[0002] When the safety door on the injection molding machine is closed manually, it will cause an impact on the door frame with a large impact force. It is not only easy to deform and damage, but also noisy.

[0003] The existing damping device is composed of a nylon cylinder clamped by a special-shaped spring sheet, which is exposed to the outside, not only occupies the space of the safety door, but also is easily damaged by external forces. Utility Model Content

[0004] In order to solve the technical problems in the background technology, the utility model discloses a safety door of an injection molding machine with a hidden damping device.

[0005] The utility model provides an injection molding machine safety door with a hidden damping device, comprising a safety door, guide wheels are arranged on the upper and lower sides of the safety door, and upper and lower sides of the frame of the injection molding machine are respectively provided with an upper guide rail and a lower guide rail for clamping the guide wheels, so as to realize the sliding of the safety door, and the lower guide rail is a rectangular tube;

[0006] A stopper is installed in the lower guide rail and is elastically connected by a spring;

[0007] The top of the stopper protrudes from the upper end surface of the lower guide rail;

[0008] The block is lowered or reset by pressing the guide wheel downward or disengaging from the block.

[0009] When the safety door rolls to the block, pressure is applied to the block, causing the block to drop; when the block drops to the point where its top is flush with the upper end surface of the lower guide rail, the guide wheel passes over the block; when the guide wheel is separated from the block, the block is reset under the action of the spring; under the action of the block, the safety door reduces the dynamic potential energy, thereby reducing the impact force on the door frame; in the utility model, the block is hidden in the lower guide rail, and only its top protrudes upward from the lower guide rail, which not only does not occupy the space of the safety door, but also has a small area protruding from the lower guide rail, and is not easily damaged by external forces. Moreover, when the guide wheel passes over the block, there will be a speed change, so the human hand can feel whether the guide wheel passes over the block, thereby being able to accurately judge the opening and closing state of the safety door.

[0010] In order to facilitate the guide wheel to stably pass over the block, a further design is that the top of the block is an isosceles obtuse triangle. In this way, the top of the block is inclined downward on both sides, and the slope is small, so that the guide wheel can stably pass over the block.

[0011] In order to facilitate the stable lifting of the stopper, a further improvement is that the stopper is matched with the inner wall of the lower guide rail in a clearance. In this way, the stopper is limited by the inner wall of the lower guide rail, and its lifting is more stable.

[0012] The upper end surface of the lower rail is provided with a plug-in hole, and the stopper is installed in the plug-in hole; if the stopper descends too far and swings in the length direction of the lower rail, it is easy to get misplaced and stuck in the plug-in hole and cannot be reset. Based on this, a further improvement is that the plug-in hole is connected to two sides of the length direction of the lower rail with folding plates extending downward; the stopper and the folding plate are matched with each other. The setting of the folding plate extends the depth of the plug-in hole, which not only prevents the stopper from being disengaged from the plug-in hole and causing dislocation, but also limits the baffle, so that the baffle will not swing in the length direction of the lower rail, and its lifting stability is higher.

[0013] In the case of machining errors and assembly errors, the resistance of the block to the safety door may be too small, making it difficult to effectively reduce the dynamic potential energy of the safety door. Based on this, a further improvement is that: an adjusting bolt is threadedly connected to the lower guide rail, and the height of the spring can be adjusted by screwing the adjusting bolt, thereby adjusting the resistance of the block to the guide wheel. The specific installation structure is: a blind hole is provided on the lower end face of the block; a convex column is provided on the threaded end of the adjusting bolt; one end of the spring is inserted into the blind hole, and the other end is sleeved with the convex column.

[0014] Since vibration will be generated when the guide wheel presses over the block, the adjusting bolt will easily loosen and rotate after long-term use, causing the height of the block to deviate. Based on this, further improvements are made: a nut is provided on the lower end face of the lower guide rail; the adjusting bolt is threadedly connected to the nut for locking the adjusting bolt.

[0015] In order to improve the moving stability of the safety door, a further design is that the guide wheel is provided with an annular clamping groove; the clamping groove is in a flared trapezoidal shape.

[0016] If a force in the width direction of the guide rail occurs in the event of an accident or misoperation, the guide wheel may easily detach from the guide rail. Based on this, a further improvement is that a retaining groove is radially extended from the slot opening.

[0017] Due to the shape difference of the rectangular tube, the guide wheel is clamped with the rectangular tube, which may cause unstable movement. If the upper guide rail also adopts a rectangular tube, the movement stability of the safety door will be reduced. Based on this, further improvements are made in that: the lower end face of the upper guide rail is an arc surface; the arc surface is in contact with the slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 It is the front view of the utility model;

[0022] Figure 4 yes Figure 3 Cross-sectional view of the middle BB;

[0023] Figure 5 yes Figure 4 The enlarged view of point D in the middle;

[0024] Figure 6 yes Figure 3 Cross-sectional view of CC;

[0025] Figure 7 yes Figure 6 Sectional view of EE;

[0026] Figure 8 yes Figure 7 The enlarged view of F in the middle;

[0027] In the figure: 1. safety door; 2. guide wheel; 3. frame; 4. upper guide rail; 5. lower guide rail; 6. block; 7. adjusting bolt; 8. nut; 9. spring; 10. limit bolt; 21. slot; 22. stop slot; 41. arc surface; 51. plug-in hole; 52. folding plate; 61. blind hole; 62. limit slot; 71. convex column. DETAILED DESCRIPTION

[0028] 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.

[0029] like Figure 1 and 3 As shown, the utility model discloses an injection molding machine safety door with a hidden damping device, including a safety door 1 installed in a door frame of an injection molding machine frame 3, one side of the door frame is set as a closed side, the safety door 1 is closed when it moves to fit the closed side, and is opened when it moves away from the closed side.

[0030] The upper and lower sides of the door frame are respectively provided with an upper guide rail 4 and a lower guide rail 5. Both ends of the upper and lower sides of the safety door 1 are provided with guide wheels 2, which are clamped on the upper guide rail 4 or the lower guide rail 5 to achieve directional movement. Figure 4 As shown, the guide wheel 2 is provided with an annular clamping groove 21; the cross section of the clamping groove 21 is an expanded trapezoid.

[0031] If a force in the width direction of the guide rail occurs in the event of an accident or misoperation, the guide wheel 2 is likely to come off the guide rail. Figure 5As shown, the insertion hole 51 of the card slot 21 radially extends with a retaining groove 22, and the groove wall of the retaining groove 22 is perpendicular to the groove bottom of the card slot 21. When the guide wheel 2 moves axially, it will be blocked by the groove wall of the retaining groove 22, thereby preventing the guide wheel 2 from detaching from the guide rail.

[0032] The lower guide rail 5 is a rectangular tube, and a stopper 6 protruding upward is installed near the closed side of the lower guide rail 5. The specific structure is as follows: Figure 7 and Figure 8 As shown, a plug hole 51 is provided at the top of the lower guide rail 5 near the closed side, and the stopper 6 is plugged into the plug hole 51. The lower end surface of the stopper 6 is provided with two symmetrically arranged blind holes 61, and the lower end surface of the lower guide rail 5 is provided with a threaded adjustment bolt 7, whose threaded end penetrates upward into the lower guide rail 5. The threaded end of the adjustment bolt 7 is provided with a boss 71, one end of the spring 9 is sleeved with the boss 71, and the other end is inserted into the blind hole 61, so that the spring 9 is installed and limited, and the stopper 6 is also made elastic. The spring 9 also supports the stopper 6, so that the top of the stopper 6 protrudes from the top of the lower guide rail 5, and blocks the guide wheel 2 on the lower side of the safety door 1 near the closed side.

[0033] By screwing the adjusting bolt 7, the height of the spring 9 can be adjusted, thereby adjusting the height of the stopper 6 and adjusting the resistance of the stopper 6, so that the safety door 1 can be effectively blocked even if there are processing errors and assembly errors.

[0034] The lower end surface of the lower guide rail 5 is provided with a nut 8 which is threadedly connected to the adjusting bolt 7; when the nut 8 is locked, it abuts against the lower end surface of the lower guide rail 5 and generates pressure between the nut 8 and the lower end surface, thereby locking and fixing the adjusting bolt 7 to prevent the adjusting bolt 7 from loosening due to vibration, causing the height of the stopper 6 to deviate.

[0035] like Figure 2 and Figure 8 As shown, the top of the block 6 is an isosceles obtuse triangle, so that the top of the block 6 is inclined downward on both sides, guiding the guide wheel 2; and the slopes on both sides of the top of the block 6 are small, so that the guide wheel 2 can stably pass over the block 6.

[0036] like Figure 6 As shown, a vertically arranged limit groove 62 is provided on the stopper 6, and a limit bolt 10 is threadedly connected on the lower guide rail 5 and clamped in the limit groove 62 to limit the lifting range of the stopper 6 to avoid excessive lifting of the stopper 6 causing plastic deformation of the spring 9.

[0037] The stopper 6 is fitted with the inner wall of the lower guide rail 5 so that the stopper 6 will not swing in the width direction of the lower guide rail 5. Figure 8As shown, the plug hole 51 is connected to two sides of the lower guide rail 5 in the length direction with folding plates 52 extending downward; the stopper 6 is in clearance with the folding plates 52. The folding plates 52 extend the depth of the plug hole 51, which not only prevents the stopper 6 from being disengaged from the plug hole 51 and causing misalignment, but also limits the stopper 6, so that the stopper 6 does not swing in the length direction of the lower guide rail 5, and the lifting stability is higher.

[0038] Due to the shape difference of the rectangular tube, the guide wheel 2 is clamped with the rectangular tube, which may cause unstable movement. If the upper guide rail 4 also adopts a rectangular tube, the movement stability of the safety door 1 will be reduced. Therefore, the following design is made: the end face of the upper guide rail 4 is an oblong, and its lower end face is a circular arc surface 41; the circular arc surface 41 is in contact with the clamping groove 21.

[0039] When the safety door 1 rolls to the stopper 6, pressure is applied to the stopper 6, so that the stopper 6 descends; when the stopper 6 descends until its top is flush with the upper end surface of the lower guide rail 5, the guide wheel 2 passes over the stopper 6; when the guide wheel 2 is separated from the stopper 6, the stopper 6 is reset under the action of the spring 9; under the action of the stopper 6, the safety door 1 reduces the dynamic potential energy, thereby reducing the impact force on the door frame; in the utility model, the stopper 6 is hidden in the lower guide rail 5, and only its top protrudes upward from the lower guide rail 5, which not only does not occupy the space of the safety door 1, but also its protruding area from the lower guide rail 5 is small and is not easily damaged by external forces. Moreover, when the guide wheel 2 passes over the stopper 6, there will be a speed change, so the human hand can feel whether the guide wheel 2 passes over the stopper 6, so that the opening and closing state of the safety door 1 can be accurately judged.

[0040] 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 safety door for an injection molding machine with a hidden damping device, comprising a safety door (1), wherein guide wheels (2) are arranged on the upper and lower sides of the safety door (1), and an upper guide rail (4) and a lower guide rail (5) are arranged on the upper and lower sides of a frame (3) of the injection molding machine, respectively, for clamping the guide wheels (2) to realize the sliding of the safety door (1), characterized in that: The lower guide rail (5) is a rectangular tube; A stopper (6) is installed in the lower guide rail (5) and is elastically connected via a spring (9); The top of the stopper (6) protrudes from the upper end surface of the lower guide rail (5); The guide wheel (2) presses down or disengages from the stopper (6), thereby achieving the descent or reset of the stopper (6).

2. The safety door of an injection molding machine with a hidden damping device according to claim 1, characterized in that: The top of the stopper (6) is in the shape of an isosceles obtuse triangle.

3. The safety door of an injection molding machine with a hidden damping device according to claim 1, characterized in that: The stopper (6) is clearance-matched with the inner wall of the lower guide rail (5).

4. The safety door of an injection molding machine with a hidden damping device according to claim 3, characterized in that: The upper end surface of the lower guide rail (5) is provided with an inserting hole (51), and the stopper (6) is installed in the inserting hole (51); The plug-in holes (51) are located on both sides of the lower guide rail (5) in the length direction and are connected with folding plates (52) extending downwards; The stopper (6) and the folding plate (52) are clearance-matched.

5. The safety door of an injection molding machine with a hidden damping device according to claim 1, characterized in that: The lower guide rail (5) is threadedly connected with an adjusting bolt (7). By screwing the adjusting bolt (7), the height of the spring (9) can be adjusted, thereby adjusting the resistance of the stopper (6) to the guide wheel (2).

6. The safety door of an injection molding machine with a hidden damping device according to claim 5, characterized in that: The lower end surface of the stopper (6) is provided with a blind hole (61); The threaded end of the adjusting bolt (7) is provided with a protruding column (71); One end of the spring (9) is inserted into the blind hole (61), and the other end is sleeved on the protruding column (71).

7. The safety door of an injection molding machine with a hidden damping device according to claim 6, characterized in that: The lower end surface of the lower guide rail (5) is provided with a nut (8); The adjusting bolt (7) is threadedly connected to the nut (8) for locking the adjusting bolt (7).

8. The safety door of an injection molding machine with a hidden damping device according to claim 1, characterized in that: The guide wheel (2) is provided with an annular clamping groove (21); The clamping slot (21) is in a flared trapezoidal shape.

9. The safety door of an injection molding machine with a hidden damping device according to claim 8, characterized in that: A retaining groove (22) is radially extended from the slot opening of the clamping groove (21).

10. The safety door of an injection molding machine with a hidden damping device according to claim 1, characterized in that: The lower end surface of the upper guide rail (4) is an arc surface (41); The arc surface (41) is in contact with the clamping groove (21).

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