JPH10291768A - Position detecting device of crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive position detecting device of a crane, to be hardly affected in the measuring environment (dust, oil, etc.) in relation to the measuring precision. SOLUTION: A traverse position detecting device 31 is provided with a touch roller device 45 provided with a roller 2 to be brought in contact with a traverse rail 1 and to be rolled on the traverse rail 1, and a rotary encoder 8 in which a rotary shaft 8a is connected to the base end 3c of a shaft joint 3 as a rotary shaft of the roller 2 through a coupling 1. The touch roller device 45 can be rotated by taking a bolt 5 as a rotary shaft, springs 10a, 10b are interposed between the touch roller device 45 and a frame 5a as a supporting part of it, and the touch roller device 45 is rotated by energizing force of the springs 10a, 110b so as to press the roller 2 to the traverse rail 1. The springs 10a, 110b and the frame 5a are fixed to one another by bolts 56 through elongated holes formed on an attaching plate 9. Moreover, a buffer 12 for alleviating shock received from the traverse rail 1 to the roller 2 is interposed between the touch roller device 45 and the frame 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position detecting device for a crane, and is useful when applied to a crane that traverses or travels along a rail, such as an overhead traveling crane.

[0002]

2. Description of the Related Art Overhead traveling cranes are used for cargo handling in various factories. FIG. 11 is a perspective view showing a schematic configuration of an example of such an overhead traveling crane. As shown in the figure, the overhead traveling crane 100 includes a pair of saddles 105a and 105b, a hoist 101, and the like.

[0003] Saddles 105a and 105b are a pair of traveling rails 104a and 105 provided in parallel near the ceiling of a factory.
104b. These saddles 105a,
105b is a traveling motor (induction motor: I
M) 106a and 106b are provided respectively. The saddles 105a and 105b are connected to the running rails 104a and
It supports both ends of a pair of parallel traversing rails 108a and 108b arranged in a direction orthogonal to 104b.

[0004] The hoist 101 includes a traversing rail 108a,
108b and traverse motor (IM) 102
, A drum 107 rotated by the lift motor (IM) 103,
07 to be wound up or down
1. Hook 11 provided at the lower end of wire rope 111
2 etc. are equipped.

Accordingly, the overhead traveling crane 100 travels in the direction of the arrow Y in the figure along the traveling rails 104a and 104b by driving the traveling motors 106a and 106b, and the hoist 101 is driven by the traversing motor 102. The cargo 113 traverses along the traversing rails 108a and 108b in the direction indicated by the arrow X in the figure, and transports the load 113 suspended from the hook 112 to a target position. At this time, the wire rope 111 provided on the hoist 101 swings in the traveling direction (Y direction) due to the traveling, and also swings in the transverse direction (X direction) due to the traversing.

Various types of overhead traveling cranes including the overhead traveling crane 100, like other transporting machines such as containers and trolleys, reduce shocks during shifting in a shorter time to a target position. It is important to be able to carry the load. On the other hand, in the overhead traveling crane, various devices constituting the overhead traveling crane, that is, a motor (a traveling motor or the like), an inverter for controlling rotation of the motor,
Although the performance has been steadily improving due to the development of various gripping devices and the like, the operation still depends on the manual operation of a skilled operator having advanced skills. However, due to the severe working environment of long-time continuous operation and the aging of operators, labor shortages have become serious, and automation of the operation of overhead traveling cranes has been desired.

Therefore, in order to realize the operation automation of the overhead traveling crane, it is important to obtain information on the deflection of the crane, that is, information on the swing angle of the wire rope 111 and the moving position (traverse position and traveling position) of the overhead traveling crane. Becomes Hereinafter, this point will be described in detail.

First, the operation sequence of the cargo handling operation by the overhead traveling crane 100 will be described. Overhead traveling crane 1
00 is carried out in the following order of operation.

At a predetermined position, the load 113 is slung on the hook 112 by the slinging rope 114. The luggage 113 is wound up. The overhead traveling crane 100 travels and travels to a predetermined position while avoiding obstacles and confirming safety. The overhead traveling crane 100 is stopped at a predetermined position. In order to stop the swing and adjust the position, the wire rope 111 slightly moves by traversing or running in accordance with the swing state of the wire rope 111. The luggage 113 is lowered. After landing the luggage 113 at a predetermined position and fixing it,
Remove the slinging rope 114 from the hook 112.

[0010] In the above operations (1) to (4), the object of automation of the operation of the overhead traveling crane 100 which is generally referred to is:
Is.

Table 1 shows each operation of the overhead traveling crane 100 which is an object of the operation automation, each control means necessary for automatically performing these operations, and necessity of shake information in each control means. It is the table | surface which showed these.

As shown in the table, the run-out information of the crane is necessary for performing the positioning control and the steady rest control, and the positioning control and the steady rest control are almost all of the operations of the overhead traveling crane 100. Obviously, obtaining the crane deflection information is important in realizing the automated operation of the overhead traveling crane 100.

[0013]

[Table 1]

Conventionally, among such run-out information of the crane, a magnetic position detector or a photoelectric position detector has been used as a position detecting device for obtaining the transverse position information and traveling position information of the overhead traveling crane. Was mainstream.

[0015]

However, since both the magnetic type position detecting device and the photoelectric type position detecting device are expensive, an overhead traveling crane having a large rated capacity installed in a factory or the like of a large company is expensive. Although it can be applied, it cannot be applied to overhead traveling cranes with small rated capacity installed in factories of small and medium-sized enterprises because of its large effect on cost. Most of the overhead traveling cranes are such small overhead traveling cranes having a rated capacity.

In addition, the photoelectric type position detecting device is used for dust, dust,
Since measurement errors easily occur due to measurement environment conditions such as oil and light, applicable environmental conditions are limited.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a crane position detecting device which is inexpensive and less affected by measurement environment conditions (dust, oil, etc.) on measurement accuracy in view of the above prior art.

[0018]

Means for Solving the Problems A first method for solving the above problems is described below.
The position detecting device for a crane according to the present invention is provided on a support portion of a crane main body that moves along a rail, and moves along with the crane main body to detect a moving position of the crane. The touch roller device includes a roller that rolls on the touch roller device, and a rotary encoder having a rotating shaft connected to the rotating shaft of the roller.

Therefore, according to the crane position detecting device of the first invention, when the crane moves along the rail, the roller of the touch roller device rolls (rotates) on the rail, and the rotating shaft of the roller At the same time, the rotation shaft of the rotary encoder rotates. That is, the moving distance of the crane is converted into the number of rotations by the touch roller device, and the amount of mechanical displacement in the direction of rotation is converted into a digital amount by the rotary encoder. Thus, the moving position of the crane is detected. Moreover, since the position detecting device of the crane is a combination of the touch roller device and the rotary encoder, the configuration is simple.

The position detecting device for a crane according to a second invention is the position detecting device for a crane according to the first invention, wherein the touch roller device is rotatably supported by the support portion, and the touch roller device is connected to the touch roller device. An elastic member is interposed between the support member and the elastic member, and the urging force of the elastic member rotates the touch roller device to press the roller against the rail. .

Therefore, according to the crane position detecting device of the second aspect of the present invention, since the elastic member is provided, the roller of the touch roller device is pressed against the rail by the urging force of the elastic member. It rotates more reliably as it moves.

The position detecting device for a crane according to the third invention is the position detecting device for a crane according to the second invention, wherein one end or the other end of the elastic member is formed at the one end or the other end. It is characterized by being fixed to the support portion side or the touch roller device side by bolts through a long hole or a long hole formed on the support portion side or the touch roller device side.

Therefore, according to the position detecting device for a crane of the third aspect of the present invention, one end or the other end of the elastic member is fixed to the support portion side or the touch roller device side through the elongated hole, so that the elastic member It is possible to arbitrarily adjust the fixed position between one end or the other end of the touch roller device and the support portion side or the touch roller device side to arbitrarily adjust the biasing force of the elastic member pressing the roller of the touch roller device against the rail. it can.

A crane position detecting device according to a fourth aspect of the present invention is the crane position detecting device according to the first, second or third aspect, wherein the roller is provided between the touch roller device and the supporting portion. It is characterized in that a shock-absorbing member for reducing the impact received from the rail is provided.

According to the position detecting device for a crane of the fourth aspect of the present invention, since the shock absorbing member is provided, even if the rail has backlash or the like, the impact received by the roller of the touch roller device from the rail can be reduced by the shock absorbing member. Is absorbed by

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. Here, the case where the hoist and saddle of the overhead traveling crane are provided with the position detecting device of the present invention will be described.

First, the positioning of the traverse position detecting device and the traveling position detecting device according to the embodiment of the present invention in the overhead traveling crane positioning and steadying control system will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration of a positioning and steadying control system for an overhead traveling crane provided with the traversing position detecting device and the traveling position detecting device, and FIG. 2 is a block diagram of the traversing position detecting device and the traveling position detecting device. It is a block diagram which shows a part structure.

In FIG. 1, portions surrounded by a chain line are a traversing position detecting device 31 and a traveling position detecting device 32 according to the embodiment of the present invention. As shown in FIG. 2, both the traversing position detecting device 31 and the traveling position detecting device 32
Alternatively, the touch roller device 45 includes the roller 2 that comes into contact with the traveling rail 61, the rotary encoder 8, and the coupling 5 that couples the rotation shaft of the roller 2 and the rotation shaft of the rotary encoder 8. ing.

As will be described in detail later, the touch roller device 45
Converts the travel distance of the crane (the hoist's traverse distance, the total travel distance of the overhead traveling crane) into a rotation speed, and the rotary encoder 8 converts the mechanical displacement amount in the rotation direction converted by the touch roller device 45 into a digital amount. I do. Thus, the traverse position of the hoist and the traveling position of the entire overhead traveling crane are detected. Then, as shown in FIG. 1, the traversing position signal and the traveling position signal are output to the control device 120.

As shown in FIG. 1, a rotary encoder 33 provided on a lifting motor 39 for rotating and driving a drum 34 detects a lifting position of a hanging member 35 such as a hook provided at a lower end of a wire rope 36. Then, the elevating position signal is output to the control device 120.

On the other hand, the traverse direction deflection angle sensor 129 and the traveling direction deflection angle sensor 130 detect the traverse direction deflection angle and the traveling direction deflection angle of the wire rope 36, respectively.
That is, the traverse direction deflection angle sensor 129 is connected to the sensor head 12.
5 is an eddy current type displacement sensor comprising an amplifier unit 128 and an amplifier unit 128.
At the same time, outputs a current corresponding to the transverse direction distance between the supporter 40 that swings in the transverse direction (ie, the swing angle of the wire rope 36 in the transverse direction), and the amplifier unit 128 converts the output current of the sensor head 125 into a DC voltage or a current. And outputs it to the control device 120 (that is, outputs a traverse direction deflection angle signal). The running direction deflection angle sensor 130 is an eddy current type displacement sensor including a sensor head 126 and an amplifier unit 127. In the sensor head 126, the running direction distance between the wire rope 36 (that is, the wire rope 3) is used.
6), and the amplifier unit 127 converts the output current of the sensor head 126 into a DC voltage or current and outputs the DC voltage or current to the control device 120 (that is, outputs a traveling direction deflection angle signal). ).

In the control unit 120, each of the above detection signals is inputted through the measurement data input processing unit 120a, and the set value is inputted through the set value input processing unit 12b. Processing at 120c,
Based on the processed data, the positioning and steadying control unit 120d performs a positioning control calculation and a steadying control calculation, and outputs a set speed signal from the speed command output unit 120e to each of the inverters 121, 122 and 123 based on the calculation results. I do. Then, based on these set speed signals, the inverters 121, 122, and 123 provide a traveling motor 37 for driving the entire overhead traveling crane 41, a traversing motor 38 for traversing the hoist, and an elevating motor 39 for rotatingly driving the drum 34. The rotation of each is controlled.

The configuration of the positioning and steadying control system and the positioning of the traverse position detecting device 31 and the traveling position detecting device 32 in the positioning and steadying controlling system have been described above. Here, FIGS. The specific configurations of the traversing position detecting device 31 and the traveling position detecting device 32 will be described based on the following.

FIG. 3 is a partially cutaway front view showing the structure of the traversing position detecting device 31, and FIG.
1 is a partially cutaway plan view, FIG. 5 is a side view showing the configuration of the traversing position detecting device 31, and FIG. 7 is a front view showing the configuration of the travel position detection device 32, FIG. 8 is a plan view showing the configuration of the travel position detection device 32, and FIG. 9 is a side view showing the configuration of the travel position detection device 32. ,
FIG. 10 is an enlarged view (an enlarged view of a portion B in FIG. 7) showing the configuration of the traveling position detecting device 32, partially cut away.

<Structure of the traversing position detecting device> In FIG. 3, reference numeral 42 denotes a hoist of an overhead traveling crane 41 (see FIG. 1). As shown in FIG. 34, etc.), a pair of frames 5a and 5b are provided in parallel so as to be located on both sides in the width direction of the traversing rail 1. The frames 5a and 5b are fastened by a nut 49 and a bolt 50 via a U-shaped holding member 48, and are held at regular intervals.

As shown in FIG. 4, drive wheels 44a and 44b are rotatably supported inside one frame 5b. These drive wheels 44a and 44b are provided inside the frame 5b along the longitudinal direction of the traversing rail 1, and both are located on the traversing surface 1a of the traversing rail 1 and attached to the outside of the frame 5b. The traverse motor 38 is driven to rotate. A driven wheel 4 is provided inside the other frame 5a.
3a and 43b are rotatably supported respectively. These driven wheels 43a, 43b are provided at both inner ends of the frame 5a along the longitudinal direction of the traversing rail 1, and both are located on the traversing surface 1a of the traversing rail 1.

Accordingly, the hoist 42 is driven by the traverse motor 38.
The driving wheels 44a and 44b are driven to rotate, thereby traversing along the traversing rail 1 in the direction of arrow X in FIG.

As shown in FIGS. 3, 4, and 5, the longitudinal center portion of the frame 5a (the driven wheel 43a
And 43b), the traversing position detecting device 31 extends through the rectangular hole 5a-1 formed in the central portion.
Is provided.

More specifically, as shown in FIGS. 4 and 5,
The encoder joint 4 penetrates a hole 5a-1 at the center of the frame 5a. Bosses 5a-2 projecting from the lower end of the encoder coupling 4 and both sides of the hole 5a-1,
5a-3 is penetrated by one bolt 51, and nuts 52 are screwed to both ends of the bolt 51, whereby the encoder joint 4 is connected to the bolt 5
It can rotate up and down around 1 as a rotation axis.

As shown in FIG. 6, a bearing 13 is fitted inside the encoder joint 4, and a central portion 3 a of the shaft joint 3 is fitted inside the bearing 13. That is, the shaft joint 4 is the bearing 1
3 is rotatably supported by an encoder joint 4 via an axis 3, and its axial direction is along the width direction of the traversing rail 1. Reference numerals 14 and 15 in FIG. 6 are retaining rings for preventing the shaft joint 3 and the bearing 13 from moving in the axial direction.

The roller 2 is fitted to the tip 3b of the shaft joint 4. The roller 2 and the shaft joint 3
Are fixed by bolts 47. Roller 2
Is in contact with the running surface 2a of the traversing rail 1. Therefore, the roller 2 can freely rotate about the shaft joint 3 as a rotation axis, and rolls on the traversing surface 1a of the traversing rail 1 as the hoist 42 traverses.

An encoder flange 6 is fixed to an end face of the encoder joint 4 by a bolt 53. That is, in the present embodiment, the touch roller device 45 is constituted by the roller 2, the shaft joint 3, the encoder joint 4, and the encoder flange 6.

A rotary encoder 8 is fixed to the end face of the encoder flange 6 by bolts 54. The rotary shaft of the rotary encoder 8 and the base end 3c of the shaft joint 3 (that is, the rotary shaft of the roller 2) are connected. They are connected by a coupling 7. The coupling operation of the coupling 7 can be performed from the outside through a hole 6a formed on the side of the encoder flange 6.

As shown in FIGS. 5 and 6, two pins 55 a and 55 b are provided on the end face of the encoder flange 6, while two pins 55 a and 55 b are provided on the mounting plate 9 fixed to the upper outside of the frame 5. Long pins 57a, 57b are provided, and these pins 55a, 55b and pin 57
a and 57b are connected by springs 10a and 10b, respectively. The springs 10a and 10b are pins 55a and 55
b is urged upward. Therefore, the roller 2 is
Due to the urging forces of a and 10b, the bolt 51 is rotated downward with the bolt 51 as a rotation axis, and its outer peripheral surface 2a is pressed against the traversing surface 1a of the traversing rail 1.

Moreover, the mounting plate 9 is
Are fixed to the frame 5a by bolts 56a and 56b through vertically long holes 9a and 9b formed in the frame 5a.
Therefore, the vertical position of the mounting plate 9 can be arbitrarily adjusted within the length range of the elongated holes 9a and 9b, whereby the urging force of the springs 10a and 10b (that is, the pressing force of the roller 2) can be arbitrarily adjusted. can do.

A mounting plate 11 is fixed to an upper end surface of the frame 5a by bolts 58, and a tip 11a of the mounting plate 11 projects inside the frame 5a. A plurality of buffers 12 serving as buffer members are penetrated through the distal end portion 11a.
2a. The cap 12b attached to the tip of the rod 12c of the buffer 12 is directed downward, and is in contact with the upper end surface of the encoder joint 4. When an impact is applied to the cap 12b, the rod 12c contracts and absorbs the impact, and the buffer 12 is a well-known buffer that is generally commercially available.

Therefore, when an impact is applied to the roller 2 due to backlash of the rail 1 while the roller 2 is rolling on the rail 1, the impact is transmitted to the buffer 12 via the shaft joint 3 and the encoder joint 4. , Buffer 12.

<Structure of Traveling Position Detecting Apparatus> In FIGS. 7, 8 and 9, reference numeral 65 denotes a saddle of the overhead traveling crane 41 (see FIG. 1). It is U-shaped and long in the running direction (arrow Y direction in FIGS. 8 and 9).

As shown in FIG. 8, drive wheels 63a and 63b are rotatably supported inside one longitudinal end of the saddle 65, respectively. These drive wheels 63a, 63b
Are connected by a shaft 66, each of which is located on the running surface 61a of the running rail 61 and is rotatably driven by a running motor 37 mounted outside the one end. In addition, saddle 6
The driven wheels 64a and 64b are rotatably supported inside the other end of the driven wheel 6 in the longitudinal direction.
4a and 64b are also located on the running surface 61a of the running rail 61. The other saddle (not shown) has the same configuration as the one saddle 61.

Therefore, the entire overhead traveling crane 41 travels along the traveling rail 61 in the arrow Y direction in FIG. 8 by rotating the driving wheels 63a and 63b by the traveling motor 37.

As shown in FIG. 9, the other end of the saddle 65 in the longitudinal direction passes through a rectangular hole 65a formed on one side surface of the other end of the saddle 65 so that the traveling position detecting device 32 are provided. This traveling position detecting device 3
2 is also rotatable in the vertical direction using a single bolt 51 as a rotation axis passing through the lower end of the encoder joint 4 and the bosses 65b and 65c protruding from both sides of the hole 65a. I have.

As shown in FIG. 10, the traveling position detecting device 32 is attached to the saddle 65, and is different from the traversing position detecting device 31 in that the roller 2 rolls on the traveling surface 61a of the traveling rail 61. However, the configuration of the apparatus itself is the same as that of the above-described traversing position detecting apparatus 31. Therefore, in the figure, the same parts as those of the traversing position detecting device 31 are denoted by the same reference numerals, and the detailed description of the configuration of the traveling position detecting device 32 is omitted.

<Operation / Effect> According to the traversing position detecting device 31 or the traveling position detecting device 32 having the above structure, the hoist 4
2 moves along the traversing rail 1 or when the entire overhead traveling crane 41 travels along the traveling rail 61, the roller 2 of the touch roller device 45 moves on the traversing surface 1 a of the traversing rail 1 or the traveling surface 61 a of the traveling rail 61. The roller 2 rolls (rotates) above, and the rotation shaft 8 a of the rotary encoder 8 rotates together with the shaft joint 3 which is the rotation shaft of the roller 2.

That is, the traversing distance of the hoist 42 or the traveling distance of the overhead traveling crane 41 as a whole is determined by the touch roller device 45.
, And the amount of mechanical displacement in the direction of rotation is converted into a digital amount by the rotary encoder 8. Thus, the traversing position of the hoist 42 or the traveling position of the entire overhead traveling crane 41 is detected.

Each of the traversing position detecting device 31 and the traveling position detecting device 32 has a simple configuration in which the touch roller device 45 and the rotary encoder 8 are combined.
It is cheap. In addition, the influence of measurement environment conditions (dust, oil, etc.) is small, and general-purpose application is easy. Furthermore, the conventional overhead traveling crane can be easily mounted by adding a small number of parts or performing a small amount of processing or welding.
In other words, the manufacturing process of the conventional overhead traveling crane can be left as it is, and only the overhead traveling crane that requires positioning and steadying control can be easily mounted by adding a few parts, slightly processing, and welding. . For this reason, the position detection devices 31 and 32 can be attached at low cost.

The roller 2 of the touch roller device 45 is pressed against the traversing surface 1a of the traversing rail 1 or the traveling surface 61a of the traveling rail 61 by the urging force of the springs 10a and 10b. It rotates more reliably as the overhead traveling crane 41 travels in its entirety. Therefore, the traversing position of the hoist 42 and the traveling position of the overhead traveling crane 41 as a whole can be detected more reliably.

Since the upper ends (mounting plate 9) of the springs 10a and 10b and the frame 5 are fixed via elongated holes 9a and 9b formed in the mounting plate 9, the spring 10
a, 10b are fixed to the frame 5 by the elongated holes 9
a, 9b arbitrarily adjusted in the length range, and the spring 10 pressing the roller 2 of the touch roller device 45 against the traversing surface 1a of the traversing rail 1 or the running surface 61a of the running rail 61.
The urging forces of a and 10b can be adjusted arbitrarily. For this reason, it is possible to easily adjust the pressing force of the roller 2 to be optimal. The position where the elongated hole is formed is not limited to the upper end side (attachment plate 9) of the springs 10a and 10b as described above, but may be the lower end side of the springs 10a and 10b, the frame 5a side, or the touch roller device 45 side. You may.

Further, since the buffer 12 is provided, even if there is play on the traversing rail 1 or the running rail 61, the impact that the roller 2 of the touch roller device 45 receives from the traversing rail 1 or the running rail 61 is reduced by the buffer. 12 to be absorbed. Therefore, it is possible to prevent the touch roller device 45 and the like from being damaged by the impact.

[0059]

As described above in detail with the embodiments of the present invention, the crane position detecting device of the first invention has a simple configuration in which a touch roller device and a rotary encoder are combined. It is cheap. In addition, the influence of measurement environment conditions (dust, oil, etc.) is small, and general-purpose application is easy. Further, the conventional crane can be easily mounted by adding a small number of parts or performing a small amount of processing and welding. In other words, it is possible to easily attach the crane to the crane that requires the positioning and steadying control only by adding a small number of components, performing a slight processing, and welding without changing the manufacturing process of the conventional crane. For this reason, the position detecting device can be attached at low cost.

According to the position detecting device for a crane of the second invention, the elastic member is provided, so that the roller of the touch roller device is pressed against the rail by the urging force of the elastic member. It rotates more reliably with. For this reason, the moving position of the crane can be detected more reliably.

According to the position detecting device for a crane of the third invention, one end or the other end of the elastic member is fixed to the support portion side or the touch roller device side via the elongated hole, so that the elastic member The fixing position between the one end or the other end and the support portion or the touch roller device side can be arbitrarily adjusted, and the biasing force of the elastic member pressing the roller of the touch roller device against the rail can be arbitrarily adjusted. . Therefore, it is possible to easily adjust the pressing force of the roller so as to be optimal.

According to the position detecting device for a crane of the fourth aspect of the present invention, since the cushioning member is provided, even if there is backlash or the like on the rail, an impact received by the roller of the touch roller device from this rail is provided by the cushioning member. Absorbed. Therefore, it is possible to prevent the touch roller device and the like from being damaged by the impact.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a positioning and steadying control system for an overhead traveling crane provided with a traversing position detecting device and a traveling position detecting device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a main configuration of the traversing position detecting device and the traveling position detecting device.

FIG. 3 is a partially cutaway front view showing the configuration of the traversing position detecting device according to the embodiment of the present invention.

FIG. 4 is a plan view showing a configuration of the traversing position detecting device, partially cut away.

FIG. 5 is a side view showing a configuration of the traversing position detecting device.

FIG. 6 is an enlarged view (an enlarged view of a part A in FIG. 3) showing a configuration of the traversing position detecting device.

FIG. 7 is a front view showing a configuration of a traveling position detection device according to the embodiment of the present invention.

FIG. 8 is a plan view showing a configuration of the traveling position detecting device.

FIG. 9 is a side view showing a configuration of the traveling position detecting device.

FIG. 10 is an enlarged view (an enlarged view of a portion B in FIG. 7) showing a configuration of the traveling position detecting device, partially cut away.

FIG. 11 is a perspective view showing a schematic configuration of an example of a conventional overhead traveling crane.

[Explanation of symbols]

 Reference Signs List 1 traversing rail 1a traversing surface 2 roller 3 shaft joint 4 encoder joint 5 frame 5a-1, 65a hole 5a-2, 5a-3, 65b, 65b boss 6 encoder flange 7 coupling 8 rotary encoder 9 mounting plate 10a, 10b spring REFERENCE SIGNS LIST 11 mounting plate 12 buffer 31 traverse position detecting device 32 running position detecting device 41 overhead traveling crane 42 hoist 45 touch roller device 51 bolt 52 nut 61 running rail 61a running surface

Claims (4)

[Claims] 1. A device provided on a support portion of a crane main body that moves along a rail, and moves together with the crane main body to detect a moving position of the crane, and contacts the rail to roll on the rail. A position detecting device for a crane, comprising: a touch roller device including a roller that rotates; and a rotary encoder having a rotating shaft connected to the rotating shaft of the roller. 2. The position detecting device for a crane according to claim 1, wherein the touch roller device is rotatably supported by the support portion, and elasticity is provided between the touch roller device and the support portion. A position detecting device for a crane, wherein a member is interposed, and the touch roller device is rotated by an urging force of the elastic member to press the roller against the rail. 3. The position detecting device for a crane according to claim 2, wherein one end side or the other end side of the elastic member is an elongated hole formed at the one end side or the other end side, or the support portion side, or the support member side. A crane position detecting device, wherein the position detecting device is fixed to the support portion side or the touch roller device side by bolts via an elongated hole formed in the touch roller device side. 4. The crane position detecting device according to claim 1, 2 or 3, wherein a cushioning member is provided between the touch roller device and the support portion to reduce an impact received by the roller from the rail. A crane position detection device, which is provided.