CN212893556U - Limiting device for crane railing door - Google Patents

Abstract

The utility model relates to a limiting device for a crane railing door, which comprises a railing door body and a limiting switch, wherein the limiting switch is communicated with a power supply, a first upright post and a second upright post are symmetrically arranged at two sides of the railing door body, the front side and the rear side of the upper part of the first upright post are both detachably and fixedly connected with one end of the railing door body through a locking mechanism, the other end of the railing door body is hinged with the second upright post through a hinge, a fixed plate extending forwards is fixed at the front side below the first upright post, the rear side of the fixed plate is fixed on the first upright post, threaded holes are respectively arranged at the four corners of one side of the fixed plate close to the railing door body, the limiting switch is detachably and fixedly connected on the fixed plate through bolts passing through the threaded holes, when the railing door body is in a closed state, the free end of the trigger rod is in contact with the lower part of the railing door body. Reduce the welding area of fixed plate and first stand, avoid the fixed plate to take place the slope, make things convenient for the bolt to wear the dress.

Description

Limiting device for crane railing door

Technical Field

The utility model belongs to the technical field of hoisting equipment, especially, relate to a stop device for hoist railing door.

Background

The crane refers to a multi-action crane for vertically lifting and horizontally carrying heavy objects within a certain range. The crane has the working characteristics of intermittent movement, namely corresponding mechanisms for taking materials, transporting, unloading and the like in one working cycle work alternately, so that the crane is more and more widely applied to the market. Along with the development of society, people also have higher and higher requirements on the safety of cranes, and in order to ensure safe production, people put forward higher requirements on the design, manufacture, use and maintenance of cranes. In order to ensure the safety of the personnel who operate the crane, a limit switch is usually arranged on a railing door of the crane. By arranging the limit switch, when the railing door is opened, the limit switch is in a disconnected state, and each operating mechanism of the crane stops operating; when the railing door is closed, the limit switch is in a closed state, and each running mechanism of the crane is started. When guaranteeing that maintenance personal maintains the inspection, when opening the railing door hoist from top to bottom, each running gear of hoist all is in the stall state, has avoided not starting the hoist when maintaining, takes place danger.

However, the stop device for the crane railing door in the current market mainly has the following problems due to unreasonable structural design and unreasonable installation mode: the bottom surface lug weld of fixed plate is inboard at the stand of railing door below, limit switch passes through the bolt and installs on the top surface of fixed plate, because the mould, drawing and operation process all have certain error, the bottom surface of fixed plate inclines easily when welding on circular steel pipe, and during the installation limit switch, the stand is touched easily to the tip of bolt, lead to the unable dress of wearing of bolt, inconvenient fixed, and often choose for use LX19-111 limit switch, the length of unable adjustment limit switch trigger bar, the adjustment of direction about only can realizing. The existence of above-mentioned problem all can lead to the pulley on the limit switch trigger bar to contact with the railing door, can't realize the outage or the circular telegram to each operating device of hoist, can't satisfy the demand of safety in production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a stop device for hoist railing door to solve the stop device for hoist railing door among the prior art because structural design is unreasonable and the mounting means is unreasonable, thereby lead to the pulley on the limit switch trigger bar can't contact with railing door, can't satisfy the technical problem of safety in production demand.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: a limiting device for a crane railing door is provided, which comprises a railing door body and a limiting switch, wherein the limiting switch is communicated with a power supply, a first upright post and a second upright post are symmetrically arranged at two sides of the railing door body, the front side and the rear side of the upper part of the first upright post are respectively detachably and fixedly connected with one end of the railing door body through symmetrically arranged latching mechanisms, the other end of the railing door body is hinged with the second upright post through a hinge, a fixing plate which extends forwards and is vertical to the first upright post is fixedly connected with the front side below the first upright post, the rear side of the fixing plate is fixedly connected onto the first upright post, threaded holes are respectively formed in the four corners of one side of the fixing plate, which is close to the railing door body, the limiting switch is detachably and fixedly connected onto the fixing plate through bolts penetrating through the threaded holes, a trigger rod is arranged on the limiting, the free end of the trigger bar is contacted with the lower part of the railing door body.

The limit switch is a YBLX-K3 travel switch.

The hasp mechanism includes the latch hook of fixed connection both sides around first stand upper portion, with latch hook matched with hasp and be used for installing the installation component of hasp, the installation component includes the supporting seat of fixed connection both sides around the railing door body, the supporting seat is type of protruding, the horizontal segment fixed connection of supporting seat is on the railing door body, the vertical section of supporting seat articulates through the round pin axle has the regulating plate that the symmetry set up extends to the direction of keeping away from first stand, fixedly connected with installation pole between two regulating plates, the installation pole runs through two regulating plates, the hasp is one end opening, one end confined door style of calligraphy, the opening direction of hasp is towards the installation pole, the blind end and the latch hook of hasp cooperate, fixed connection can be dismantled on the installation pole in the both sides of hasp open end, the bottom fixedly connected with depression bar of two regulating plates.

The railing door body comprises a pair of parallel transverse rods and a pair of parallel vertical rods, the transverse rods are fixedly connected with the vertical rods through arc-shaped rods, horizontal rods are fixedly connected between the two vertical rods, and the transverse rods, the arc-shaped rods and the vertical rods are connected end to form a rectangular frame structure.

The thickness of the fixed plate is 5 mm.

The utility model has the advantages that: (1) the structure design is reasonable, the installation position is reasonable, the rear side face of the fixing plate is fixed on the front side of the first stand column, compared with the prior art that the bottom face of the fixing plate (namely one face with the largest area on the fixing plate) is directly welded on the inner side of the stand column below the railing door, the welding of a plane and an arc face in the prior art is converted into the welding between a ridge and the arc face, the welding area of the fixing plate and the first stand column is reduced, the situation that the trigger rod cannot be contacted with the railing door body due to the fact that the fixing plate is inclined in the welding process is avoided, the installation precision of the limit switch is improved, the pulley on the trigger rod can be ensured to be contacted with the railing door body, the requirement of safe production is met, when the limit switch is installed, the end portion of the bolt cannot touch the first stand column, the bolt is convenient; (2) the front side and the rear side of the upper part of the first upright post are respectively provided with a locking mechanism, so that the operating personnel can be protected doubly, the hand rail door body can be prevented from being opened when the operating personnel touch the hand rail door body unintentionally, and the safety performance of the hand rail door body can be further improved; (3) the limit switch selects the YBLX-K3 travel switch, and compared with the LX19-111 limit switch commonly used in the prior art, the trigger bar can not only be adjusted in the left-right direction, but also can be adjusted in the up-down direction, so that the situation that a pulley on the trigger bar cannot be contacted with a railing door body due to the difference of the welding heights of the fixing plates is avoided, and the requirement of safe production is further met.

Drawings

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a rear view of FIG. 1;

FIG. 4 is an enlarged view taken at A in FIG. 1;

fig. 5 is an enlarged view at B in fig. 2.

Reference numerals: 1-railing door body, 2-limit switch, 3-first stand, 4-second stand, 5-latched devices, 6-hinge, 7-fixed plate, 8-screw hole, 9-trigger bar, 10-latch hook, 11-hasp, 12-installation component, 13-supporting seat, 14-round pin axle, 15-regulating plate, 16-installation pole, 17-depression bar, 18-transverse bar, 19-vertical bar, 20-arc pole, 21-horizontal bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

In the description of the present specification and the embodiments, the direction in which the front side surface of the first pillar 3 is located in fig. 2 is taken as the front.

As shown in fig. 1 and 2, the utility model comprises a balustrade door body 1 and a limit switch 2, the limit switch 2 is connected with a power supply, the balustrade door body 1 is symmetrically provided with a first upright 3 and a second upright 4, as shown in fig. 2 and 3, the front and back sides of the upper part of the first upright 3 are respectively connected with one end of the balustrade door body 1 by a symmetrically arranged locking mechanism 5, the other end of the balustrade door body 1 is hinged with the second upright 4 by a hinge 6, as shown in fig. 4, the front side of the lower part of the first upright 3 is welded with a fixing plate 7 which extends forwards and is vertical to the first upright 3, the back side of the fixing plate 7 is welded on the first upright 3, the four corners of one side of the fixing plate 7 close to the balustrade door body 1 are respectively provided with a threaded hole 8, the limit switch 2 is fixedly connected on the fixing plate 7 by, the thickness of fixed plate 7 is 5mm, conveniently trompil on fixed plate 7, and the installation of the bolt of being convenient for is fixed. The limit switch 2 is provided with a trigger rod 9, and when the railing door body 1 is in a closed state, the free end of the trigger rod 9 is in contact with the lower part of the railing door body 1. The limit switch 2 selects a YBLX-K3 travel switch. As shown in fig. 5, the latch mechanism 5 includes latch hooks 10 fixedly connected to the front and rear sides of the upper portion of the first upright post 3, a latch 11 matched with the latch hooks 10, and an installation assembly 12 for installing the latch 11, the installation assembly 12 includes support bases 13 fixedly connected to the front and rear sides of the balustrade door body 1, the support bases 13 are in a convex shape, the horizontal sections of the support bases 13 are fixedly connected to the balustrade door body 1, the vertical sections of the support bases 13 are hinged to symmetrically arranged adjustment plates 15 extending in a direction away from the first upright post 3 by pins 14, an installation rod 16 is fixedly connected between the two adjustment plates 15, the latch 11 is in a door shape with an open end and a closed end, the open direction of the latch 11 faces the installation rod 16, the closed end of the latch 11 is matched with the latch hooks 10, and two sides of the open end of the latch 11 are, the bottom ends of the two adjusting plates 15 are fixedly connected with a pressure lever 17, and the pressure lever 17 is Y-shaped.

As shown in fig. 2, the balustrade door body 1 includes a pair of parallel transverse rods 18 and a pair of parallel vertical rods 19, the transverse rods 18 and the vertical rods 19 are welded and fixed through arc rods 20, horizontal rods 21 are welded between the two vertical rods 19, and the transverse rods 18, the arc rods 20 and the vertical rods 19 are connected end to form a rectangular frame structure.

The limit switch 2 described in this embodiment is prior art, and is not described in detail.

During the use, after the maintainer got into the maintenance platform, adjust depression bar 17, when the blind end of hasp 11 removed to contact with latch hook 10, with hasp 11 locking on latch hook 10, both sides all set up latched device 5 around first stand 3 upper portion, further improve railing door body 1's security performance. After the rod door body 1 is closed, the free end of the trigger rod 9 is in contact with the lower part of the railing door body 1, the limit switch 2 is in a closed state, the limit switch 2 transmits the signal to a control system of the crane, and the control system controls each running mechanism of the crane to be started. When the barrier door body 1 is opened by a maintainer, the free end of the trigger rod 9 is separated from the lower part of the barrier door body 1, the limit switch 2 is in a disconnected state, the limit switch 2 transmits a signal to the control system of the crane, the control system controls the stop operation of each operating mechanism of the crane, the crane is prevented from being started when the barrier door body 1 is opened, and the personal safety of the maintainer is ensured.

The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.

Claims (5)

1. The utility model provides a stop device for hoist railing door which characterized in that: the guardrail comprises a guardrail door body and a limit switch, wherein the limit switch is communicated with a power supply, a first upright post and a second upright post are symmetrically arranged at two sides of the guardrail door body, the front side and the rear side of the upper part of the first upright post are respectively detachably and fixedly connected with one end of the guardrail door body through symmetrically arranged latching mechanisms, the other end of the guardrail door body is hinged with the second upright post through a hinge, a fixing plate which extends forwards and is vertical to the first upright post is fixedly connected with the front side below the first upright post, the rear side surface of the fixing plate is fixedly connected with the first upright post, threaded holes are respectively formed in the four corners of one side of the fixing plate, which is close to the guardrail door body, the limit switch is detachably and fixedly connected with the fixing plate through bolts passing, when the railing door body is in a closed state, the free end of the trigger rod is in contact with the lower part of the railing door body.

2. The spacing device for a crane balustrade door of claim 1, wherein: the limit switch is a YBLX-K3 travel switch.

3. The spacing device for a crane balustrade door of claim 2, wherein: the hasp mechanism includes the latch hook of fixed connection both sides around first stand upper portion, with latch hook matched with hasp and be used for installing the installation component of hasp, the installation component includes the supporting seat of fixed connection both sides around the railing door body, the supporting seat is type of protruding, the horizontal segment fixed connection of supporting seat is on the railing door body, the vertical section of supporting seat articulates through the round pin axle has the regulating plate that the symmetry set up extends to the direction of keeping away from first stand, fixedly connected with installation pole between two regulating plates, the installation pole runs through two regulating plates, the hasp is one end opening, one end confined door style of calligraphy, the opening direction of hasp is towards the installation pole, the blind end and the latch hook of hasp cooperate, fixed connection can be dismantled on the installation pole in the both sides of hasp open end, the bottom fixedly connected with depression bar of two regulating plates.

4. The spacing device for a crane balustrade door of claim 2, wherein: the railing door body comprises a pair of parallel transverse rods and a pair of parallel vertical rods, the transverse rods are fixedly connected with the vertical rods through arc-shaped rods, horizontal rods are fixedly connected between the two vertical rods, and the transverse rods, the arc-shaped rods and the vertical rods are connected end to form a rectangular frame structure.

5. A spacing device for a crane balustrade door according to any one of claims 1-4, wherein: the thickness of the fixed plate is 5 mm.

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