JPH0352243Y2 - - Google Patents

Description

[Detailed description of the invention] "Technical field" This invention provides an elevated rail switching point that improves safety performance by loading a device to prevent trolleys from falling onto the existing elevated rail switching point. be.

``Prior art'' Conventionally, in slaughterhouses and various factories, elevated rails have been installed under the indoor ceilings, and suspended transport trolleys have been run on the rails. The following two types of switching points are commonly used. The first is Figure 7,
This is the switching point shown in FIGS. 8 and 9. It consists of a main body C attached to a branch B of a flat steel elevated rail A, a sliding body E having a straight rail piece D pivoted at a fulcrum F, and an inverted body having a branch type rail piece G. The sliding body E is connected to the straight rail I and the branched rail J by rotating and reversing it as necessary, so that the sliding body E can be alternately connected to the straight rail I and the branched rail J to perform switching. This is a suspension rail switching point (Utility Model Publication No. 14346/1983), which has a stop piece L pivotally attached to the end of the rail J, so that it is automatically turned over by a reversing body H, and prevents the wheels from moving backwards.

Also, the second conventional switching point is as shown in FIG.
This is shown in FIG. This involves attaching a main body C to a branch B of a flat steel elevated rail A, and providing an inverted body N having a straight rail piece D thereon.
A reversing body H having a branched track piece G is also provided, and rotation reversing gears O and P that mesh with each other are provided at the bases of both of the reversing bodies N and H, and rotation reversing gears O and P are provided as necessary. By doing so, the straight rail piece D and the branched rail piece G are made to appear and disappear alternately, and the straight rail piece I
and branch rails J are connected alternately to perform switching, and a stop piece L is pivotally attached to the end of the branch rail J so that the reversing body H automatically rolls over and the wheels M move backwards. This is a suspension rail switching point that is made up of two parts.

That is, in the first conventional example, the straight track piece D moves in and out through the sliding body E, whereas in the second conventional example, the straight track piece D moves in and out through the reversing body N. The only major difference is that the rotation is reversed by a gear O provided at the base. Both are convenient and highly practical, as they can be easily connected and switched alternately with the straight rail I and the branch rail J by simply pulling down the operating device K suspended from the switching point. be.

``Technical Issues'' However, when switching between conventional two-way switching points, depending on the way the rope is pulled, the conventional switching points may stop in a half-open state, or the wheels may be turned during the rotation of the reversing body or the movement of the sliding body. If there is a moment when the situation is such that the trolley Q happens to be running or going backwards, the wheels M on the elevated rail A
There was an accident in which the trolley Q came off and fell onto the worker's head along with the suspended cargo. Conventionally, the cause of such Trolley Q falling accidents was thought to be derailment and falls caused by workers' mistakes in switching operations, so training and caution in switching operations are being encouraged as an accident prevention measure. However, this accident was viewed as a defect in the equipment, and little effort was made to improve the equipment itself to improve its safety.

However, recently, as the running density of Trolley Q has increased, the inventor has noticed that the number of falling accidents is increasing even if care is taken in switching operations, and the inventor has discovered the truth behind these Trolley Q falling accidents. While searching for the cause of this, it was discovered that there are two structural points in conventional switching points that could cause the wheels to fall during switching operations. It has been discovered that when the wheels M of the trolley Q pass a predetermined location on the elevated rail A at the moment when such a special condition occurs, a falling accident of the trolley Q always occurs. Figure 9 shows
This figure shows the rail switching operation status in the case of the first conventional example, where A is a cross-sectional explanatory diagram showing the state when straight rails are connected, C is a cross-sectional explanatory diagram showing the state when branched rails are connected, and Ro 2 shows the moment during the switching operation when the wheel can be dropped.
In other words, this shows the moment when the branch type rail piece G is in the middle of rotation due to reversal, and at the same time, the straight rail starts sliding and is in a half-open state. . If the trolley Q passes through a half-opened rail section at such a moment with good timing, an accident will occur in which the wheels M will come off the rail and the trolley Q will fall Y. Similarly, Fig. 11 shows the switching operation state in the case of the second conventional example, which changes sequentially from when the straight rail I is connected (a) to when the branch rail J is connected (d).
At the moment shown in Figure B during this reversal rotation, both the straight rail piece D and the branched rail piece G are in a half-open state on the rail, and the wheels M of the trolley Q do not hit anything. It creates a space that you can pass through. Therefore, if the wheel M runs on the half-open portion of the rail at this moment, the trolley Q will come off the rails, causing an accident in which the trolley Q falls. In the above case,
This is the first cause of trolley fall accidents in conventional switching point devices. A device to prevent this is being researched and developed separately.

As mentioned above, in the conventional device, there is another location where the trolley may fall due to structural reasons. This is shown in FIGS. 12 and 13. In other words, in the conventional device, whether it is the first embodiment or the second embodiment, the stop L having the configuration shown in FIG. 12 is pivotally attached to the end of the branch rail J. As shown in Fig. 13C, when the wheels M of the trolley that has passed once move backwards for some reason, the stop pieces L stand up to stop the trolley from moving. However, after the wheels M of the trolley Q pass the point where the branched rail piece G is connected at the end of the branched rail J (Fig. As the wheel rotates, it begins to move in the direction W away from the connection point, but when the wheel M is still on the stop L and remains in an overturned state (Fig. 13 b), the wheel moves backwards. When this starts, the stop piece L has not yet been erected, so the wheel M will simply fall off the end of the branch track J (Fig. 13D). This situation is more likely to occur when many trolleys Q are suspended on the track or when the track is sloped, and is the main cause of trolley falling accidents that have been increasing recently. It is.

The present invention has devised a new trolley fall prevention device that covers the second cause of falling of conventional devices as mentioned above, and by attaching this to the conventional device, it is possible to create a safe elevated rail system that does not cause falling accidents regardless of the operation. The purpose is to realize a switching point.

"Means for Solving Technical Problems" Hereinafter, the present invention will be described in detail based on the illustrated embodiment.A trolley fall prevention device is newly installed at the switching point of a conventional elevated rail.

1, 2, and 3 show a first embodiment of the trolley fall prevention device according to the present invention, and FIG. 4 shows a second embodiment of the trolley fall prevention device. First, to explain the first embodiment, 1 is a body having a bracket 1a for attachment to the end of a branched rail, and this fixed body 1 has a cylindrical body 3 having a vertical guide passage 2 and a balancer attachment body. 4 is provided. The cylindrical body 3 has a braking hook 7 formed by fixing a locking hook part 6 to the upper end of the columnar body 5.
It is fitted so that it can move up and down via the guide passage 2. The locking hook portion 6 is formed so as to wrap around from the side of the end of the branch rail J to the front of the base edge, and has a tip that does not twist when subjected to impact from the wheel M from the side. Fix the twist prevention plate 8 in such a manner.

The balancer mounting body 4 has a fulcrum 10 in the middle of the support arm 9, and one end of the support arm 9 is attached with a weight 11, and the opposite end is shaped like a column of the brake hook 7. A balancer 14 configured to engage with an engaging portion in the body 5 is attached. Moreover, this balancer 14 is designed with the left and right balance calculated around the fulcrum 10. In normal times, the brake hook 7 is lifted upward, but when the branch rail J rotates for connection and a pressing force is applied from above the brake hook 7,
A weight 11 that is heavy enough to be lightly lowered is provided. That is, in the case of the illustrated embodiment, the brake hook 7 is caused to generate a normal upward movement because it is designed so that the following conditions hold.

(wa×1a)<(wb×1b)<(wc) *However, wa is the weight of the brake hook 7, 1a is the distance from the brake hook 7 to the fulcrum 10, wb is the weight of the weight 11, 1b is the distance from the weight 11 to the fulcrum 10, and wc is the pressing force of the branched track piece G.

In addition, 12 in the figure is a protection plate fixed to the lower part of the body 1. This protects the trolley Q from swinging left and right while running and prevents the suspended cargo from coming out due to centrifugal force. It has the function of preventing the iron ring of the hanger connected to the lower part of the columnar body 5 from hitting the lower part of the columnar body 5 and causing damage, and furthermore, preventing the trolley Q from falling off in the vertical direction.

Next, a second embodiment of the trolley fall prevention device will be described based on FIG. 4.A body 1 having a bracket for attachment to the end of a branch rail J, a cylindrical body 3 having a vertical guide passage 2, A balancer mounting body 4 is provided, and a columnar body 5 is attached to the cylindrical body 3.
A braking hook 7 having a locking hook portion 6 fixed to the upper end thereof is fitted so as to be movable up and down via the guide passage 2. On the other hand, the balancer mounting body 4 has the brake hook 7 lifted upward during normal times, but when the branch rail J rotates for connection and a pressing force is applied from above the brake hook 7, Balancer 1 with a weight that lowers it slightly downward
There is no difference from the first embodiment in that 4 is provided. However, the balancer 14 does not apply the lever principle as in the first embodiment, but is connected to a weight and a cable via a pulley 13. Therefore, the shape of the balancer mounting body 4 is also cylindrical.

The trolley fall prevention device configured as described above exhibits its effects by being arranged and interlocked with the switching point 15 of the elevated rail A as described below. The configuration of the elevated rail switching point 15 is as follows:
A main body C is attached to a branch B of an elevated rail A, and a moving body E, N having a straight rail piece D and a reversing body H having a branch type rail piece G are attached to this so as to interlock with each other, and the reversing body C is attached to the branch part B of the elevated rail A. By rotating the body H through its rotation axis 16, the movable bodies E and N appear and disappear, and the straight rail pieces D and the branch type rail pieces G are alternately connected to the branch part B of the elevated rail A. At the very least, the elevated rail A should be switched. Note that the shape of the movable body is not particularly limited as long as it is a member that can move the linear track piece D including the sliding body E and the reversing body N in the illustrated embodiment in a manner that it can freely appear and retract. In the present invention, the trolley fall prevention device is arranged and fixed at the end of the branch rail of the elevated rail A, and the braking hook 7 is mounted on the track in front of the edge of the branch rail by the weight 11 of the balancer 14 during normal operation. It protrudes higher than the branch rail J in order to suppress the lateral impact and load caused by the wheels M that have been lifted upward and are moving backwards on the track, and the branch type rail piece G rotates to connect with the branch rail J and applies braking. When the braking hook 7 is pressed from above, the braking hook 7 is constructed so as to sink slightly below the rail.

When using the present invention, it is only necessary to pull the cable K for switching operation. When the cable K is pulled, as shown in FIG. Both of the straight track pieces D begin to move. In particular, when the branched rail piece G begins to come off the end connection point of the branched rail J, the brake hook 7, whose head was previously held down by the branched rail piece G, rises due to the action of the balancer 14. It protrudes onto the track in front of the edge of the branch track J. Its upward and protruding movement starts automatically as soon as the branched track piece G starts moving, regardless of whether the trolley Q remains on the stop piece L or after it has passed. Therefore, the effect of preventing the trolley from falling is faster and more reliable than with a stopper.

``Effects of the present invention'' As mentioned above, the main body C is attached to the branch B of the elevated rail A.
is attached, and the moving bodies E and N having the straight track piece D and the inverting body H having the branched track piece G are attached thereto so as to interlock with each other, and by rotating the inverting body H, the above-mentioned movement can be achieved. The structures E and N are made to appear and disappear, and the straight rail pieces D and the branched rail pieces G of the elevated rail A are alternately connected, so that the elevated rail A can be switched, and the end of the branched rail J There is a stopper L on the part.
is pivoted, and the stopper L is pressed and released by the inverting body H.
At the elevated rail switching point 15, which automatically overturns or stands up so that the wheels M do not move backwards, at the end of the branch rail J, there is a brake hook 7
is lifted upward during normal times by the weight 11 of the balancer 14, and protrudes higher than the rail so as to suppress the lateral impact and load caused by the wheel M moving backwards on the track, and the branch type rail piece G is connected to the branch rail J. The trolley is equipped with a trolley fall prevention device configured so that when the brake hook 7 is pressed from above when the trolley rotates for connection, the brake hook 7 sinks slightly below the rail. This is an elevated rail switching point with a fall prevention device. Therefore, in the present invention, when the elevated rail is switched from a branched rail to a straight rail by operating the switching point, there is a momentary delay in the rise of the stop L, and depending on the position where the trolley Q is stopped, the stop Trolley Q falls from the end of branch rail J because L does not stand up. In order to prevent this, the present invention protrudes the brake hook 7 ahead of the stopper L to stop the trolley Q traveling at this time, so that it will not fall off accidentally due to structural reasons. We were able to realize a switching point with even higher safety. Moreover, it is economical since there is no need for any special energy supply other than gravity to start its operation. In addition, since it is only necessary to add the trolley fall prevention device according to the present invention without any modification to the existing elevated rail switching point, improvement work to improve the safety of the already installed device is easy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the trolley fall prevention device according to the present invention, FIGS. 2 and 3 are side views showing the operating state of the trolley fall prevention device according to the present invention, and FIG. FIG. 5 is a cross-sectional view of a main part showing another embodiment of the trolley fall prevention device according to the present invention; FIG. 5 is a plan view showing an embodiment of the elevated rail switching point with the trolley fall prevention device according to the present invention; FIG. 7 is a perspective view showing another embodiment of the elevated rail switching point with trolley fall prevention device according to this invention, FIG. 7 is a plan view showing a state in which the conventional switching point connects its straight rails, and FIG. FIG. 9 is a plan view showing a state in which the switching point connects its branch rails; FIG.
Fig. 0 is a perspective view showing another embodiment of the conventional switching point, Fig. 11 A, B, C, and D are cross-sectional explanatory views showing the operating state of the conventional switching point shown in Fig. 10, and Fig. 12 is a perspective view showing another embodiment of the conventional switching point. FIGS. 13A, 13B, 13C and 13D are side views showing the state of the stop pieces provided at the ends of the branch rail, and FIGS. 1... Body, A... Elevated rail, 5... Column body, D... Straight rail piece, 7... Braking hook,
G...branch type track piece, 11...weight, L...stop piece, 14...balancer, Q...trolley.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A main body is attached to a branch part of an elevated rail, and a moving body having a straight rail piece and a reversing body having a branch type rail piece are attached to this so as to interlock with each other. By rotating the reversing body, the movable body appears and disappears, and the straight rail pieces and the branched rail pieces of the elevated rail are alternately connected, so that the elevated rail can be switched. At the elevated rail switching point, a stop piece is pivotally attached to the end of the rail, and when the reversing body is pressed or released, the stop piece automatically rolls over or stands up to prevent the wheels from moving backwards. At the end of the branch track, a brake hook is placed on the track ahead of the edge of the branch track, and is lifted upward by the weight of the balancer during normal times to prevent lateral impact from wheels moving backwards on the track. The branch type rail piece is configured to protrude higher than the rail to restrain the load, and when the branch type rail piece rotates to connect with the branch rail and presses the brake hook from above, the brake hook sinks slightly below the rail. An elevated rail switching point with a trolley fall prevention device, characterized in that it is equipped with a trolley fall prevention device. (2) The trolley fall prevention device has a body fixed to the end of the branch rail via a mounting bracket, and the fixed body is provided with a cylindrical body having a vertical guide passage and a balancer mounting body,
A braking hook formed by fixing a locking hook portion to the upper end of the columnar body is fitted into the cylindrical body so as to be able to move up and down via the guide passage, and the balancer mounting body has a braking hook fixed to the upper end of the columnar body so as to be movable up and down. The braking hook is lifted upwards, but when the branch rail rotates to connect and presses the braking hook from above, a weight balancer is installed so that it will lightly drop downward. An elevated rail switching point with a trolley fall prevention device as set forth in claim 1 of the utility model registration claim.