A safety device for preventing the release of a hot press

Abstract

The utility model relates to a kind of hot press anti-drop safety device, and second connecting seat and locking portion are additionally arranged in movable unit, and active locking member and locking drive assembly are set in the corresponding position of rack, when movable unit rises to preset anti-drop position, locking drive assembly drives active locking member to move, so that it forms mechanical connection with locking portion, when movable unit needs to be lowered, locking drive assembly drives active locking member to separate from locking portion again, locking and unlocking of active locking member to locking portion are controlled by locking drive assembly, when lifting cylinder is caused to drop due to vibration, mechanical fatigue or accidental touch etc., the mechanical connection of active locking member and locking portion can effectively limit the descent of movable unit, directly solve the problem that movable unit is out of control due to lifting cylinder drop in prior art, threaten equipment operation safety and operator personal safety.

Description

Technical Field

[0001] This utility model relates to the field of hot presses, and in particular to a safety device for preventing hot presses from detaching. Background Technology

[0002] A hot press (belt splicer) is a specialized device that connects the ends of two belts into one unit through a hot pressing process. It is widely used in belt repair and processing in industrial conveyor belts and other fields. The core function of the hot press relies on the stable operation of the lifting drive cylinder to control the lifting and lowering of the upper hot press component to complete the belt splicing operation. In the existing technologies, the small-size belt splicer with publication number CN219806483U and the box-type air-cooled splicer with publication number CN117087181A are equipped with a lifting drive cylinder mounted on the top plate and then connected to the top cover through a fixing component to achieve lifting control. However, in the existing hot press, the lifting cylinder may accidentally fall off due to vibration, mechanical fatigue (such as wear of connecting threads), or accidental contact during the lifting or pressing process. At the same time, the hot press has a high-temperature surface during operation, which directly affects the safety of equipment operation and the personal safety of operators. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a hot press anti-detachment safety device to address the shortcomings of the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hot press anti-detachment safety device, comprising a frame, a fixed unit and a movable unit arranged opposite each other at both axial ends of the frame, and a drive mechanism for driving the movable unit to move closer to or away from the fixed unit. A connection space is formed between the fixed unit and the movable unit for the belt to enter or disengage. The drive mechanism includes a plurality of lifting cylinders installed on the frame above the movable unit and a plurality of first connecting seats installed on the movable unit. The output end of the lifting cylinder is connected to the first connecting seat and drives the movable unit to move axially through the first connecting seat. The movable unit is provided with a second connecting seat, and the second connecting seat is provided with a locking part. One end of the frame corresponding to the locking part is provided with an active locking element and a locking drive assembly for driving the active locking element to move. The locking drive assembly drives the active locking element to unlock or lock the locking part.

[0005] Using the above technical solution, a connection space is formed between the fixed unit and the movable unit by supporting the frame. The lifting cylinder in the drive mechanism is connected to the first connecting seat on the movable unit through its output end, thereby driving the movable unit to lift axially to complete the belt connection operation. On this basis, a second connecting seat and a locking part are added to the movable unit, and an active locking component and a locking drive assembly are set at corresponding positions on the frame. When the movable unit rises to the preset anti-detachment position, the locking drive assembly drives the active locking component to move, so that it forms a mechanical connection with the locking part (such as locking). When the movable unit needs to be lowered, the locking drive assembly drives the active locking component to disengage from the locking part. (i.e., unlocking) The locking drive component controls the locking and unlocking of the locking part by controlling the active locking component. When the lifting cylinder falls off due to vibration, mechanical fatigue or accidental contact, the mechanical connection between the active locking component and the locking part can effectively limit the fall of the movable unit. This directly solves the problem in the prior art of the movable unit losing control due to the falling of the lifting cylinder, threatening the safety of equipment operation and the personal safety of operators. At the same time, the precise drive of the locking drive component ensures the reliability and controllability of the locking and unlocking actions. The locking drive component can be a motor, cylinder or other structure, and the active locking component and the locking part can be a hook, pin or other structure.

[0006] The aforementioned hot press anti-detachment safety device can be further configured as follows: the locking part is a hanging ring, the active locking component is a locking hook, the locking hook is hinged to the frame, and one end is provided with a hook-shaped part for cooperating with the hanging ring, and the other end is provided with a driven part that is linked with the locking drive assembly. The inner surface of the hook-shaped part has a hook groove that connects with the hanging ring.

[0007] By adopting the above technical solution, the locking part is set as a hanging ring, and the active locking component is set as a locking hook that is hinged to the frame. The hook-shaped part at one end of the locking hook engages with the hanging ring through the hook groove on its inner surface, and the driven part at the other end is linked with the locking drive assembly. When the locking drive assembly drives the driven part to move, the locking hook rotates around the hinge point, causing the hook-shaped part to move closer to or away from the hanging ring, thereby locking (the hook-shaped part engages with the hanging ring through the hook groove) or unlocking (the hook-shaped part disengages from the hanging ring). The hook groove design of the hook-shaped part enhances the connection stability with the hanging ring and prevents the hanging ring from sliding or accidentally disengaging in the locked state. The hinge structure makes the movement of the locking hook flexible and controllable. The linkage between the driven part and the locking drive assembly ensures the accuracy of locking and unlocking. When the lifting cylinder accidentally falls off due to vibration, mechanical fatigue, or accidental contact, the hook-shaped part of the locking hook can effectively limit the fall of the movable unit through the mechanical locking of the hook groove with the hanging ring. This directly solves the problem in the prior art where the movable unit loses control due to the disengagement of the drive component, threatening the safety of equipment operation and the personal safety of operators.

[0008] The aforementioned hot press anti-detachment safety device can be further configured such that: the hanging ring is fixedly connected to the second connecting seat by a second fastener, and the hanging ring is vertically upward with a hook-shaped part passing through the middle.

[0009] Using the above technical solution, the hanging ring is detachably and fixedly connected to the second connecting seat on the movable unit through a second fastener (such as a bolt or screw), ensuring the structural integration of the hanging ring and the movable unit. The vertically upward design of the hanging ring makes its opening direction match the movement trajectory of the locking hook (usually vertical or near vertical). The reserved hooking space in the middle provides a clear insertion path for the hook-shaped part of the locking hook. When the locking drive assembly drives the locking hook to move, the hook-shaped part can pass through the hooking space and form a hook groove with the hanging ring. The vertically upward direction of the hanging ring is consistent with the movement direction of the hook-shaped part, reducing the risk of misalignment between the hook-shaped part and the hanging ring during the locking process, and improving the accuracy and efficiency of the locking action. The hooking space in the middle provides a precise insertion guide for the hook-shaped part, ensuring that the hook-shaped part can pass smoothly through the hook groove and tightly engage with the hanging ring.

[0010] The aforementioned hot press anti-detachment safety device can be further configured as follows: the frame includes a base frame for fixing the unit for installation, a top frame corresponding to the base frame, and a column connecting the base frame and the top frame; the locking hook is disposed inside the top frame; the top frame and the locking hook are hinged together by a hinge shaft; the locking hook protrudes from the lower end of the top frame to form the hook-shaped part; and the locking hook protrudes from the upper part of the top frame to form the driven part that is linked with the locking drive assembly.

[0011] Using the above technical solution, the frame consists of a base frame, a top frame, and columns connecting the two, forming a stable support frame. The locking hook is located inside the top frame and is hinged to the top frame via a hinge shaft, allowing it to rotate around the hinge shaft. The lower end of the locking hook protrudes from the top frame to form a hook-shaped part, and the upper end protrudes from the top frame to form a driven part. When the locking drive assembly drives the driven part to move, the locking hook rotates around the hinge shaft, causing the hook-shaped part at the lower end to move closer to or away from the hanging ring, thereby locking or unlocking the movable unit. The internal space of the top frame provides installation protection for the locking hook, preventing external environmental factors (such as dust and collisions) from interfering with its operation and improving the stability of the anti-detachment structure.

[0012] The aforementioned hot press anti-detachment safety device can be further configured as follows: the top frame has a hollow groove inside, the locking hook is disposed in the hollow groove, the top frame has a first sliding groove for the driven part to move above it, and a second sliding groove for the hook-shaped part to move below it, the second sliding groove is arranged parallel to the first sliding groove, and the locking hook is also provided with a limiting stop angle extending to one side.

[0013] The above technical solution incorporates a hollow groove inside the top frame as a accommodating space for the locking hook. The locking hook is placed within this groove for structural protection. A first sliding groove above the top frame and a second sliding groove below it are arranged parallel to each other, respectively constraining the movement trajectories of the upper driven part and the lower hook-shaped part of the locking hook. This ensures that when the driven part moves under the action of the locking drive assembly, the hook-shaped part moves synchronously in the same direction as the driven part. A limiting stop extending to one side of the locking hook contacts the inner wall of the top frame or the edge of the sliding groove during its rotation, limiting excessive rotation. The hollow groove provides a closed installation environment for the locking hook, reducing external... Dust and collisions can interfere with the locking hook's movement, improving structural reliability. The parallel design of the first and second slides ensures that the driven part and the hook-shaped part move in the same direction, preventing misalignment between the hook-shaped part and the hanging ring due to trajectory deviation. This improves the accuracy of locking and unlocking actions. The limiting stop angle restricts the rotation range of the locking hook, preventing the hook-shaped part from detaching from the hooking space or colliding with other parts due to excessive rotation. This ensures a stable connection between the hook-shaped part and the hanging ring in the locked state, and also prevents the hook-shaped part from getting stuck due to excessive movement during unlocking, further enhancing the reliability of the anti-detachment safety device.

[0014] The aforementioned hot press anti-detachment safety device can be further configured as follows: the limiting stop angle is disposed in the hollow groove and extends toward one end of the locking drive assembly; a counterweight is provided at the limiting stop angle; and the counterweight is disposed at the end of the limiting stop angle away from the hook-shaped part.

[0015] Using the above technical solution, the limiting stop is set in the hollow groove of the top frame and extends towards the locking drive assembly. It limits the maximum rotation of the locking hook by contacting the inner wall of the hollow groove. The counterweight is set at the end of the limiting stop away from the hook-shaped part. By increasing the weight at this end, the center of gravity distribution of the locking hook is adjusted. Gravity is used to assist the locking hook in resetting and stabilize its movement. The gravity of the counterweight will naturally pull the locking hook back to the initial position, ensuring that the hook-shaped part can exit the hanging ring in time or remain in the locked state, thus improving the reliability of the action response. The cooperation between the counterweight and the limiting stop can offset the inertial offset of the locking hook caused by high-speed movement or vibration, reduce the risk of misalignment between the hook-shaped part and the hanging ring, and make the locking and unlocking actions smoother.

[0016] The aforementioned hot press anti-detachment safety device can be further configured such that: the locking part has a pin hole, the active locking component is a plug block, the plug block is hinged to the frame, and one end is provided with a pin for engaging with the pin hole, and the other end is provided with a driven part that is linked with the locking drive assembly.

[0017] Using the above technical solution, another structural method is proposed. The locking part is provided with a pin hole as a locking interface. The active locking component adopts a plug-in block structure that can be hinged around the frame. One end of the plug-in block forms a plug-in and plug-out engagement with the pin hole through a pin, and the other end is linked with the locking drive assembly through a driven part. When the locking drive assembly is activated, the driving force is transmitted to the driven part, causing the plug-in block to rotate around the hinge axis or move directly in a straight line (for example, the pin hole directly passes through the top frame), which drives the pin end to move closer to or away from the pin hole of the locking part, thereby realizing the action of inserting the pin into the hole or withdrawing it from the hole.

[0018] The aforementioned hot press anti-detachment safety device can be further configured such that: the locking drive assembly includes a locking cylinder mounted on the frame, the delivery end of the locking cylinder is connected to the active locking component, and drives the active locking component to perform locking or unlocking actions on the locking part.

[0019] The above technical solution utilizes a locking drive assembly consisting of a locking cylinder mounted on the frame. Its delivery end is connected to the active locking component. The cylinder piston rod extends or retracts, transmitting driving force to rotate the active locking component around its hinge axis. This causes the pin or hook-shaped part of the active locking component to move closer to or further away from the pin hole or hanging ring, thus locking or unlocking the locking part. The locking cylinder, acting as a power source, is directly connected to the active locking component, simplifying the drive transmission path, reducing mechanical losses in intermediate transmission components, and improving the action response speed. The linear motion characteristics of the cylinder match the hinge rotation of the active locking component, allowing precise adjustment of the active locking component's action amplitude by controlling the cylinder stroke. This ensures the precise fit between the pin and pin hole, and between the hook-shaped part and hanging ring. The fixed mounting on the frame stabilizes the direction of the cylinder's driving force, preventing action deviations caused by installation position offsets. When main drive components such as the lifting cylinder fail unexpectedly, the locking cylinder can mechanically lock the active locking component to limit the movement of the unit, directly solving the equipment loss of control and safety hazards caused by the detachment of drive components in existing technologies.

[0020] The aforementioned hot press anti-detachment safety device can be further configured such that: the movable unit is provided with a wedge-shaped mounting track, and the first connecting seat and / or the second connecting seat are provided with a wedge-shaped groove adapted to the surface of the wedge-shaped mounting track, and the first connecting seat and / or the second connecting seat can slide along the surface of the wedge-shaped mounting track.

[0021] Using the above technical solution, a wedge-shaped mounting rail is installed on the movable unit. The first connecting seat and / or the second connecting seat form a sliding fit with the guide rail through the wedge-shaped grooves that fit the surface. The inclined characteristics of the wedge surface constrain the movement direction of the connecting seat—the connecting seat can only slide along the extension direction of the guide rail. In the plane perpendicular to the sliding direction (such as the up-down or left-right directions), displacement cannot occur due to the fit of the wedge surface. The fitting design of the wedge-shaped guide rail and the wedge-shaped groove improves the guiding accuracy of the connecting seat during sliding through large-area contact, avoiding misalignment of the connecting seat with other components due to shaking or displacement. The wedge structure The inclined surface can distribute the load borne by the connector, reduce local pressure, reduce wear on the guide rail and the groove, and extend service life. The guiding effect of the wedge-shaped surface enables the connector to have a self-centering function during installation or sliding (the inclined surface can automatically adjust the position of the connector), simplifying assembly operations and improving positioning efficiency. In addition, the wedge fit has a certain tolerance for manufacturing or installation errors (the inclined surface allows the connector to fine-tune its position within a small range), ensuring smooth sliding operation, while stabilizing and limiting the displacement of the moving unit in the non-sliding direction, providing a basis for the precise fit of subsequent locking mechanisms (such as pins and hooks).

[0022] The aforementioned hot press anti-detachment safety device can be further configured such that: the first connecting seat and / or the second connecting seat include a connecting fixed seat and a connecting movable block, the connecting movable block is detachably connected to the connecting fixed seat through a first fastener, and the wedge-shaped groove is formed after the ends of the connecting movable block and the connecting fixed seat are locked together.

[0023] Using the above technical solution, the first connecting seat and / or the second connecting seat adopt a split structure design, consisting of a fixed connecting seat and a movable connecting block, which are detachably connected by a first fastener (such as bolts, screws, etc.). When the ends of the movable connecting block and the fixed connecting seat are locked together, the two together form a wedge groove that fits the surface of the wedge-shaped mounting track of the movable unit, thereby achieving a sliding fit with the wedge-shaped mounting track. The split design reduces the overall processing difficulty of the wedge groove. By adjusting the installation position of the movable block, a precise fit with the guide rail can be achieved. The pre-tightening force of the fasteners can be used to adjust the fit between the movable block and the fixed seat, ensuring that the groove wall is in close contact with the guide rail and avoiding jamming or guide deviation during sliding movement.

[0024] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0025] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0026] Figure 2 This is a diagram showing the state of the mobile unit during its ascent, according to an embodiment of this utility model.

[0027] Figure 3This is a diagram showing the state of the active unit when locked according to an embodiment of this utility model.

[0028] Figure 4 This is a partial line drawing of the locking mechanism of the mobile unit in an embodiment of this utility model.

[0029] Figure 5 for Figure 4 A 3D diagram after removing the top frame.

[0030] Figure 6 for Figure 5 Enlarged view of point A.

[0031] Figure 7 This is a schematic diagram of the connection structure between the active unit and the first connecting seat in an embodiment of this utility model. Detailed Implementation

[0032] like Figures 1-7 As shown, a hot press anti-detachment safety device includes a frame, a fixed unit 1 and a movable unit 2 arranged opposite each other at both ends of the frame's axial direction, and a drive mechanism for driving the movable unit 2 to move closer to or away from the fixed unit 1. A connection space is formed between the fixed unit 1 and the movable unit 2 for the belt to enter or disengage. The drive mechanism includes two lifting cylinders 3 installed on the frame above the movable unit 2 and two first connecting seats 4 installed on the movable unit 2. The frame includes a base frame 10 for mounting the fixed unit 1, a top frame 11 corresponding to the base frame 10, and a connection between the base frame 10 and the top frame. The column 12 of the top frame 11 has a hollow groove inside. The top frame 11 and the column 12 are connected by angle steel 13. The output end of the lifting cylinder 3 is connected to the first connecting seat 4 and drives the movable unit 2 to move axially through the first connecting seat 4. The movable unit 2 is provided with a second connecting seat 5 in the middle of the first connecting seat 4. The second connecting seat 5 is provided with a hanging ring 51. The top frame 11 is provided with a locking hook 6 and a locking cylinder 7 that drives the locking hook 6 to move. The locking cylinder 7 drives the locking hook 6 to enter or disengage from the hanging ring 51, thereby unlocking or locking the movable unit 2.

[0033] like Figure 6 As shown, the locking hook 6 is set in the hollow groove inside the top frame 11. The locking hook 6 is hinged to the top frame 11 through the hinge shaft 61. The lower end of the locking hook 6 protrudes from the top frame 11 and has a hook-shaped part 62 for cooperating with the hanging ring 51. The other end protrudes from the top of the top frame 11 and has a driven part 63 that is linked with the locking cylinder 7. The inner surface of the hook-shaped part 62 has a hook groove 621 for connecting with the hanging ring 51. The hanging ring 51 is fixedly connected to the second connecting seat 5 through the second fastener 52, and the hanging ring 51 is vertically upward with a hanging space 53 in the middle for the hook-shaped part 62 to pass through.

[0034] like Figure 4 , Figure 6As shown, the top frame 11 has a first slide groove 111 above for the driven part 63 to move inside, and a second slide groove 112 below for the hook-shaped part 62 to move inside. The second slide groove 112 is arranged parallel to the first slide groove 111. The locking hook 6 also has a limiting stop angle 63 extending to one side. The limiting stop angle 63 is set in the hollow groove and extends toward one end of the locking cylinder 7. A counterweight block 631 is installed on the limiting stop angle 63. The counterweight block 631 is set at the end of the limiting stop angle 63 away from the hook-shaped part 62. The conveying end of the locking cylinder 7 is connected to the locking hook 6 and drives the locking hook 6 to lock (hook) or unlock (release) the hanging ring 51.

[0035] like Figures 1-3 As shown, when the fixed unit 1 and the movable unit 2 are opened, the lifting cylinders 3 on both sides drive the movable unit 2 to rise. At this time, the locking cylinder 7 pushes the driven part 63 above the locking hook 6 away from the locking cylinder 7. The hook-shaped part 62 below the locking hook 6 will rotate along the hinge shaft 61, approach the locking cylinder 7, and cause the hook-shaped part 62 to be misaligned with the hanging ring 51. As the movable unit 2 continues to rise until it reaches the preset anti-detachment position, the locking cylinder 7 will stop air intake and retract, causing the hook-shaped part 62 to reset and the hanging ring 51 to be sleeved in the hook groove 621. The setting of the counterweight 631 provides locking The stable counterweight provided by cylinder 7 prevents insufficient tension of locking hook 6 under normal conditions, ensuring that even if lifting cylinder 3 falls off, locking hook 6 will firmly hold movable unit 2 and prevent it from falling, greatly improving personnel safety and facilitating safe material changing or loading operations. When descent is required, locking cylinder 7 pushes the driven part 63 above locking hook 6 away from locking cylinder 7, causing hook-shaped part 62 to disengage from hanging ring 51, making it easier for lifting cylinders 3 on both sides to drive movable unit 2 to descend and close. Then locking cylinder 7 stops supplying air, and locking hook 6 completes the entire anti-detachment operation.

[0036] like Figures 4-7 As shown, the movable unit 2 is provided with a wedge-shaped mounting track 21. The first connecting seat 4 and the second connecting seat 5 are both provided with wedge-shaped grooves 40 that are adapted to the surface of the wedge-shaped mounting track 21, so that the first connecting seat 4 and the second connecting seat 5 can slide laterally along the surface of the wedge-shaped mounting track 40, which facilitates the adjustment of the relative position of the first connecting seat 4 and the second connecting seat 5 to adapt to different cylinder positions. At the same time, the first connecting seat 4 and the second connecting seat 5 each include a connecting fixed seat 41 and a connecting movable block 42. The connecting movable block 42 is detachably connected to the connecting fixed seat 41 by a first fastener 43. After the ends of the connecting movable block 42 and the connecting fixed seat 41 are locked together, the wedge-shaped groove 40 is formed, so that the adjusted position of the first connecting seat 4 and the second connecting seat 5 will not move. The structural design of the wedge-shaped mounting track 21 and the wedge groove 40 makes it easy to adjust the first connecting seat 4 and the second connecting seat 5 radially, while also stably connecting them to the top of the movable unit 2 and restricting their axial disengagement.

[0037] Correspondingly, the anti-detachment mounting device can also be configured such that: a pin hole is provided on the surface of the locking part, and the active locking component is a plug-in block. The plug-in block is hinged to the frame, and one end is provided with a pin for engaging with the pin hole, while the other end is provided with a driven part that is linked to the locking drive assembly. When it is necessary to complete the locking action to prevent the movable unit 2 from detaching, it is only necessary to push the plug-in block by the locking cylinder 7, thereby aligning the pin with the upward-moving pin hole to achieve stable locking and prevent the movable unit 2 from accidentally detaching.

Claims

1. A safety device for preventing the detachment of a hot press, comprising a frame, a fixed unit and a movable unit disposed opposite each other at both axial ends of the frame, and a drive mechanism for driving the movable unit to move closer to or away from the fixed unit, wherein a connection space is formed between the fixed unit and the movable unit for a belt to enter or disengage, the drive mechanism comprising a plurality of lifting cylinders mounted on the frame above the corresponding movable unit and a plurality of first connecting seats mounted on the movable unit, the output end of the lifting cylinders being connected to the first connecting seats and driving the movable unit to move axially up and down through the first connecting seats, characterized in that: The active unit is provided with a second connecting seat, and the second connecting seat is provided with a locking part. The frame is provided with an active locking component and a locking drive assembly that drives the active locking component to move at one end of the locking part. The locking drive assembly drives the active locking component to unlock or lock the locking part.

2. A safety device for preventing the release of a press according to claim 1, characterized in that: The locking part is a hanging ring, and the active locking component is a locking hook. The locking hook is hinged to the frame, and one end is provided with a hook-shaped part for cooperating with the hanging ring, and the other end is provided with a driven part that is linked with the locking drive assembly. The inner surface of the hook-shaped part has a hook groove that connects with the hanging ring.

3. A safety device for preventing the release of a press according to claim 2, characterized in that: The hanging ring is fixedly connected to the second connecting seat by a second fastener, and the hanging ring is vertically upward with a hook-shaped part passing through the middle.

4. A safety device for preventing the release of a press according to claim 2, characterized in that: The frame includes a base frame for mounting the fixed unit, a top frame corresponding to the base frame, and a column connecting the base frame and the top frame. The locking hook is located inside the top frame. The top frame and the locking hook are hinged together by a hinge shaft. The locking hook extends through the lower end of the top frame to form the hook-shaped part. The locking hook extends through the upper part of the top frame to form the driven part that is linked with the locking drive assembly.

5. A safety device for preventing the release of a press according to claim 4, characterized in that: The top frame has a hollow groove inside, and the locking hook is set in the hollow groove. The top frame has a first sliding groove for the driven part to move above it and a second sliding groove for the hook-shaped part to move below it. The second sliding groove is parallel to the first sliding groove. The locking hook also has a limiting stop angle extending to one side.

6. A hold-down safety device for a hot press according to claim 5, wherein: The limiting stop angle is disposed in the hollow groove and extends toward one end of the locking drive assembly. A counterweight is provided at the limiting stop angle, and the counterweight is disposed at the end of the limiting stop angle away from the hook-shaped part.

7. A safety device for preventing the release of a press according to claim 1, characterized in that: The locking part has a pin hole, the active locking component is a plug block, the plug block is hinged to the frame, and one end is provided with a pin for engaging with the pin hole, and the other end is provided with a driven part that is linked with the locking drive assembly.

8. A hold-down safety device for a hot press according to any one of claims 1 to 7, wherein: The locking drive assembly includes a locking cylinder mounted on the frame. The delivery end of the locking cylinder is connected to the active locking component, which drives the active locking component to lock or unlock the locking part.

9. A hot press anti-detachment safety device according to any one of claims 1-7, characterized in that: The movable unit is provided with a wedge-shaped mounting track, and the first connecting seat and / or the second connecting seat are provided with a wedge-shaped groove adapted to the surface of the wedge-shaped mounting track. The first connecting seat and / or the second connecting seat can slide along the surface of the wedge-shaped mounting track.

10. A safety device for a hot press according to claim 9, wherein: The first connecting seat and / or the second connecting seat includes a connecting fixed seat and a connecting movable block. The connecting movable block is detachably connected to the connecting fixed seat through a first fastener. After the ends of the connecting movable block and the connecting fixed seat are engaged and locked, the wedge-shaped groove is formed.

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