JPH04135597U - Lifting height detection device for cargo handling equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lifting height detection device for a cargo handling device that accurately detects lifting height without being affected by expansion and contraction of a lifting chain. [Configuration] When the lifting cylinder 13 is extended, the cargo handling tool 11
is lifted by the lifting chain 12 and fixed mast 1
It rises along 0. Along with this, the lifting height detection chain 14 rotates and the amount of movement of the lifting height detection chain 14 is detected by the lifting height detector 15.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention detects the lifting height of cargo handling equipment installed on cargo handling vehicles such as forklifts. Regarding equipment.

0002

[Conventional technology]

The configuration of a lift height detection device for a conventional cargo handling device is shown in FIGS. 5 to 7. Figures 5 and 6 are Lifting height detection for single-mast type cargo handling equipment; Figure 7 shows lift height detection for double-mast type cargo handling equipment The device is shown.

0003 <Conventional example 1> In the lift height detection device of the cargo handling equipment shown in Fig. 5, a lift chain 2 is attached to a fixed mast 1. , a lift height detection sprocket 5 is attached to the lift bracket 4 attached to the fork 3. is installed, and this rotational speed is detected by the rotary encoder 6 and the lift of the bracket 4 is determined. Detecting high.

0004 <Conventional example 2> In the lifting height detection device of the cargo handling equipment shown in Fig. 6, the rotational speed of the sheave 7 is determined by the rotary encoder. The lift height of the lift bracket 4 is detected by the radar 6. In addition, in the figure, 8 is It is a lift cylinder.

[0005] <Conventional example 3> In the lift height detection device of the cargo handling equipment shown in FIG. Installation, detect the amount of movement of the lifting mast 9 using the rotary encoder 6 and detect the lift height. are doing.

[0006]

[Problem that the idea aims to solve]

Conventional Examples 1 to 3 described above have the following problems. (1) In conventional example 1 shown in Fig. 5 Since the lift height detector is attached to a moving part, the wiring becomes complicated and disconnections may occur. Moreover, a large space is required to install the lift height detector.

[0007] (2) In the conventional example 2 shown in Fig. 6, in addition to the problem in (1), the lift If the chain expands or contracts, accurate lift height cannot be detected.

[0008] (3) In the conventional example 3 shown in Fig. 7, like the conventional example 2, the lift is caused by changes in the load. If the chain is expanded or contracted, accurate lift height cannot be detected.

[0009] In view of the above, the present invention simplifies the wiring of the lift height detector and is less prone to disconnection. , the lifting height of cargo handling equipment that enables accurate lifting height detection without affecting the expansion and contraction of the lift chain. The purpose is to provide a detection device.

0010

[Means to solve the problem]

(1) The problem solving means according to claim 1 of the present invention is fixed to the vehicle body as shown in Figures 1 and 2. A fixed mast 10 and a cargo handling tool 1 that can be raised and lowered with respect to the fixed mast 10. 1, a lifting chain 12 that suspends the cargo handling tool 11 such that it can be raised and lowered, and the cargo handling tool 1 1 along a fixed mast 10. In the device, an endless lifting height detection chain 14 is attached to the fixed mast 10 and rotates freely. The cargo handling tool 11 is fixed to a part of the lifting height detection chain 14, The cargo handling tool 1 is attached to the fixed mast 10 by detecting the amount of movement of the lifting height detection chain 14. A lifting height detector 15 for detecting lifting height of 1 is attached.

[0011] (2) The problem solving means according to claim 2 is a fixing device fixed to the vehicle body as shown in FIG. a mast 10; a lifting mast 30 attached to the fixed mast 10 so as to be able to rise and fall; , a cargo handling tool 11 that can be raised and lowered with respect to the lifting mast 30, and A lifting chain 12 that is suspended so as to be freely lowered, and a fixed mast 10 that connects the lifting mast 30. In the cargo handling device comprising a lifting cylinder 13 for lifting and lowering along the An endless lifting height detection chain 14 is rotatably wound around the lifting mast 30. A cargo handling tool 11 is fixed to a part of the high detection chain 14, and is mounted on the fixed mast 10. Detects the amount of movement of the lifting height detection chain 14 to detect the lifting mast 30 and the cargo handling equipment. A lifting height detector 15 for detecting the lifting height of 11 is attached.

0012 (3) The problem solving means according to claim 3 is a fixing device fixed to the vehicle body as shown in FIG. a mast 10; a lifting mast 30 attached to the fixed mast 10 so as to be able to rise and fall; , a cargo handling tool 11 that can be raised and lowered with respect to the lifting mast 30, and For raising and lowering the lifting chain 12 that is suspended so as to be freely lowered and the lifting mast 30 In the cargo handling device, the fixed mast 10 has an endless lifting cylinder 13. A first lifting height detection chain 14 is rotatably wound around the lifting mast 30. An end-shaped second lifting height detection chain 40 is rotatably wound around the second lifting height detection chain 40. A cargo handling tool 11 is fixed to a part of the crane 40, and a cargo handling tool 11 is fixed to a part of the crane 40, and the A first transmission sprocket 41 meshing with the second lifting height detection chain 40; It meshes with the lift height detection chain 14 and rotates synchronously with the first transmission sprocket 41. The amount of movement of the second lifting height detection chain 40 is transmitted to the first lifting height detection chain 14. A second transmission sprocket 42 is disposed at the lower part of the fixed mast 10. The movement amount of the lifting height detection chain 14 is detected and the lifting mast 30 and the cargo handling equipment 11 are moved. A lift height detector 15 for detecting lift height is attached.

[0013]

[Effect]

(1) In the problem solving means according to claim 1, the lifting cylinder 13 is extended. Then, the cargo handling equipment 11 is lifted by the lifting chain 12 and placed along the fixed mast 10. and rise. Along with this, the lifting height detection chain 14 rotates. At this time, The lifting height detector 15 detects the amount of movement of the lifting height detection chain 14, and detects the lifting height of the cargo handling tool 11. is detected.

[0014] (2) In claim 2, when the lifting cylinder 13 is extended, the lifting mast 30 is fixed. The cargo handling tool 11 is lifted up by the lifting chain 12. and rises along the elevating mast 30. Along with this, the lifting height detection chain 14 Rotate and move. At this time, the lift height detector 15 detects the amount of movement of the lift height detection chain 14. The lifting height of the lifting mast 30 and the lifting height of the cargo handling tool 11 are detected.

[0015] (3) In claim 3, when the lifting cylinder 13 is extended, the lifting mast 30 is fixed. The cargo handling equipment 11 is lifted up along the fixed mast 10 and lifted by the lifting chain 12. and rises along the lifting mast 30. Along with this, the second lifting height detection chain 4 0 rotates, the transmission sprocket 41 is connected to the second lifting height detection chain 40. It rotates and moves by meshing with it. At this time, the transmission sprocket 42 is also transmitted. It rotates together with the sprocket 41. Then, the first lifting height detection chain 14 is rotated by the engagement of the second transmission sprocket 42. At this time, the lift test The lifting device 15 detects the amount of movement of the first lifting height detection chain 14 and lifts the lifting mast 30. The height and the lifting height of the cargo handling tool 11 are detected.

[0016]

【Example】

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

[0017] <First example> FIG. 1 is a schematic diagram showing the configuration of a lifting height detection device of a cargo handling device according to a first embodiment of the present invention; FIG. 2 is also a schematic side view thereof.

[0018] As shown in the figure, the lift height detection device of this embodiment is a substantially U-shaped fixed device fixed to the vehicle body. A fixed mast 10, a cargo handling tool 11 that can be raised and lowered with respect to the fixed mast 10, and A lifting chain 12 (lift chain) that suspends the cargo handling equipment 11 so as to be able to rise and fall freely; A lifting cylinder (lift) for raising and lowering the cargo handling tool 11 along the fixed mast 10 In a single-mast type cargo handling device consisting of a cylinder) 13, the fixed mast An endless lift height detection chain 14 is rotatably wound around the lift height detection chain 10. The cargo handling equipment 11 is fixed to a part of the chain 14, and the lifting equipment 11 is fixed to the fixed mast 10. Lifting height detection that detects the lifting height of the cargo handling tool 11 by detecting the amount of movement of the height detection chain 14 A container 15 is attached.

[0019] As shown in FIG. 2, the cargo handling tool 11 includes a fork 16 for handling cargo, and It consists of a lift bracket 17 attached to the back of the lift The foot bracket 17 is fixed to the lifting chain 12 via a fixture 17a. Ru.

[0020] As shown in FIG. 1, one end of the lifting chain 12 is fixed to the lift bracket 17. a sheave 18 whose other end is rotatably supported by the rod tip of the lifting cylinder 13; The cylinder body is fixed to the cylinder body of the lifting cylinder 13.

[0021] The lifting height detection chain 14 is rotatable above and below the fixed mast 10, as shown in FIG. It is interposed between a pair of sprockets 19 and 20 that are currently supported.

[0022] The lift height detector 15 is rotatably supported on the upper part of the fixed mast 10, as shown in FIG. The lift height detection sprocket 19 and the rotor connected to the sprocket 19 It is composed of a re-encoder 21.

[0023] In the above configuration, when the lifting cylinder 13 is extended, the cargo handling tool 11 is moved to the lifting chain. It is hoisted by a horn 12 and rises along a fixed mast 10. Along with this, fried The high detection chain 14 rotates between sprockets 19 and 20. At this time, The rotary encoder 21 reads the rotation speed of the lift height detection sprocket 19 and The amount of movement of the height detection chain 14 is detected, and the lifting height of the cargo handling tool 11 is detected.

[0024] In this way, the lift height detection chain 14 is separately attached to the fixed mast 10 to determine the lift height. A part of the detection chain 14 is fixed to the cargo handling tool 11, and the lifting height is detected by the lifting height detector 15. By detecting the amount of movement of the transport chain 14 and detecting the lifting height of the cargo handling tool 11, Since the height detector 15 can be installed at any position below the fixed mast 10, it is possible to check the height of the lift. The wiring of the output device 15 is simplified and is less likely to be disconnected. In addition, lifting chain 1 The lifting height of the cargo handling tool 11 can be accurately detected without being affected by the expansion and contraction of the cargo handling tool 2.

[0025] <Second example> FIG. 3 is a perspective view of a lifting height detection device of a cargo handling device according to a second embodiment of the present invention.

[0026] As shown in the figure, the lift height detection device of this embodiment includes a fixed mast 10 and a fixed mast 1. a substantially U-shaped elevating mast 30 that is attached to the A cargo handling tool 11 that can be raised and lowered freely, and a lift that suspends and supports the cargo handling tool 11 so that it can be raised and lowered. The descending chain 12 and the elevating mast 30 are raised and lowered along the fixed mast 10. In a double-mast type cargo handling device consisting of a lifting cylinder 13 for An endless lifting height detection chain 14 is rotatably wound around the descending mast 30 to detect the lifting height. A cargo handling tool 11 is fixed to a part of the detection chain 14, and the upper part of the fixed mast 10 The amount of movement of the lifting height detection chain 14 is detected and the lifting mast 30 and the cargo handling tool 1 are A lifting height detector 15 for detecting lifting height of 1 is attached.

[0027] The lifting chain 12 has one end fixed to the lift bracket 17 of the cargo handling tool 11. The other end is rotatably attached to the upper beam portion 30a of the lifting mast 30 via a fixture 30f. The sheave 18 is supported by a sheave 18 and is fixed to the upper part of the fixed mast 10. Ru.

[0028] The rod of the lifting cylinder 13 is fixed to the upper beam portion 30a.

[0029] The lifting height detection chain 14 is provided with fixtures 31b and 31 at the top and bottom of the lifting mast 30. It is interposed between sprockets 31 and 32 which are rotatably supported via c. Further, a part of the lifting height detection chain 14 is connected to the lift height detection chain 14 of the cargo handling tool 11 via the fixture 17a. It is attached to the foot bracket 17.

[0030] The lift height detector 15 is mounted on the upper part of the fixed mast 10 via a fixture 10a. a lift height detection sprocket 19 that is supported by the lift height detection chain 14 and meshes with the lift height detection chain 14; , and a rotary encoder 20 connected to the sprocket 19. Ru.

[0031] In the above configuration, when the lifting cylinder 13 is extended, the lifting mast 30 is moved to the fixed mast. The cargo handling equipment 11 is lifted up by the lifting chain 12. It ascends along the elevating mast 30. Along with this, the lifting height detection chain 14 is Since the rocket rotates between 31 and 32, the lift height detection sprocket 19 also changes the lift height. It rotates by meshing with the detection chain 14. At this time, rotary encoder 2 1 reads the rotation speed of the lift height detection sprocket 19, and reads the rotation speed of the lift height detection chain 14. The lifting height of the lifting mast 30 and the lifting height of the cargo handling tool 11 are detected.

[0032] In this way, in addition to the lifting chain 12, there is also a lifting chain to which a part of the cargo handling equipment 11 is fixed separately. A height detection chain 14 etc. is provided on the lifting mast 30, and this lift height detection chain 14 The lift height detector 15 detects the lift height from the movement amount of the lifting chain 12. The lifting height of the lifting mast 30 and the lifting height of the cargo handling equipment 11 can be accurately detected without affecting the expansion and contraction of the Ru. Other effects are similar to those of the first embodiment.

[0033] <Third Example> FIG. 4 is a perspective view of a lifting height detection device for a cargo handling device according to a third embodiment of the present invention.

[0034] In the second embodiment, the lifting height detection chain 14 is attached to the lifting mast 30. Therefore, the lifting height detector 15 that detects the amount of movement of the lifting height detection chain 14 is mounted on a fixed mast. If the height of the fixed mast 10 is high, the lifting height The work of installing and adjusting the detector 15 becomes complicated.

[0035] Therefore, as shown in the figure, in this embodiment, the fixed mast 10 is provided with an endless first lift height detector. A second lifting height detection chain 14 is rotatably wound around the lifting mast 30, and an endless second lifting height detection chain 14 is installed. The chain 40 is rotatably wound around the chain 40, and a cargo handling tool is attached to a part of the second lifting height detection chain 40. 11 is fixed and engaged with the second lifting height detection chain 40 at the lower part of the lifting mast 30. The first transmission sprocket 41 meshes with the first lifting height detection chain 14. It rotates synchronously with the lifting sprocket 41 to change the amount of movement of the second lifting height detection chain 40. A second transmission sprocket 42 for transmission to the first lifting height detection chain 14 is disposed, A lifting mast is installed at the bottom of the fixed mast 10 by detecting the movement amount of the first lifting height detection chain 14. A lifting height detector 15 for detecting the lifting height of the striker 30 and the cargo handling equipment 11 is installed.

[0036] The first lifting height detection chain 14 has fixtures 10a on the top and bottom of the fixed mast 10, It is interposed between the sprockets 19 and 43 which are rotatably supported via the sprocket 10b. Ru.

[0037] The second lifting height detection chain 40 is fixed to the upper beam portion 30a of the lifting mast 30. Sprocket 31 rotatably supported via tool 30b and lifting mast 30 A first transmission sprocket 41 is rotatably attached to the lower beam portion 30c via a fixture 30e. It is interposed between. In addition, a part of the second lifting height detection chain 40 is a fixture. It is attached to the lift bracket 17 of the cargo handling tool 11 via 17a.

[0038] The second transmission sprocket 42 is similar to the first transmission sprocket 41. The first lifting height detection chip is rotatably supported by the lower beam portion 30e of the lifting mast 30. It is meshed with Aene 14. Note that the other configurations are almost the same as the second embodiment. be.

[0039] In the above configuration, when the lifting cylinder 13 is extended, the lifting mast 30 is moved to the fixed mast. The cargo handling equipment 11 is lifted up by the lifting chain 12. It ascends along the elevating mast 30. Along with this, the second lifting height detection chain 40 is Since it rotates, the first transmission sprocket 41 connects to the second lifting height detection chain 40. It rotates by meshing with the At the same time, the second transmission sprocket 42 also connects to the first transmission sprocket. It rotates together with the transmission sprocket 41. Then, the first lifting height detection chain 14 is connected between sprockets 19 and 43 by the meshing force of the second transmission sprocket 42. Rotate and move. At this time, the rotary encoder 21 detects the lift height detection sprocket 1. 9 and detects the amount of movement of the first lifting height detection chain 14, The lift height of the striker 30 and the lift height of the cargo handling tool 11 are detected.

[0040] In this way, the first lifting height detection chain 14 is attached to the fixed mast 10, and the A second lifting height detection chain 40 is attached to the mast 30, and each lifting height detection chain 14 , 40 are engaged with the respective transmission sprockets 41 and 42 attached to the lifting mast 30. By doing so, the amount of movement of the cargo handling tool 11 can be changed from the second lifting height detection chain 40 to the transmission stage. Is it possible to communicate from the prokets 41, 42 to the first lifting height detection chain 14? In addition, the lift height detector 15 can be installed at any position below the fixed mast 10. Becomes Noh. Therefore, the installation work and adjustment work of the lift height detector 15 can be easily performed. I can do it. Other effects are similar to those of the first embodiment.

[0041] It should be noted that the present invention is not limited to the above-mentioned embodiments, but may be modified within the scope of the present invention. Of course, many modifications and changes may be made to the embodiments described.

[0042] For example, in the second embodiment, a two-tiered mast was described, but a three-tiered mast was described. may also be applied.

[0043] Additionally, the present invention may be applied to masts with free lifts and full free masts. .

[0044]

[Effect of the idea]

As is clear from the above description, according to claims 1 to 3 of the present invention, the lifting chain Instead of detecting the lift height by detecting the amount of movement, a separate chain for detecting the lift height is installed. The lifting height can be detected by detecting the amount of movement of the lifting height detection chain using the lifting height detector. This simplifies the wiring of the lift height detector, eliminates disconnections, and reduces the lift height. Excellent effectiveness, such as being able to accurately detect the lift height without being affected by the expansion and contraction of the ahn. There is fruit.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the configuration of a lifting height detection device for a cargo handling device according to a first embodiment of the present invention.

FIG. 2 is also a schematic side view thereof.

FIG. 3 is a perspective view of a lifting height detection device of a cargo handling device according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a lifting height detection device for a cargo handling device according to a third embodiment of the present invention.

FIG. 5 is a schematic diagram showing the configuration of a lifting height detection device for a cargo handling device according to Conventional Example 1.

FIG. 6 is a schematic diagram showing the configuration of a lifting height detection device for a cargo handling device according to Conventional Example 2.

FIG. 7 is a schematic diagram showing the configuration of a lifting height detection device for a cargo handling device according to Conventional Example 3.

[Explanation of symbols]

10 Fixed mast 11 Cargo handling equipment 12 Lifting chain 13 Lifting cylinder 14,40 Lift height detection chain 15 Lift height detector 30 Lifting mast 41, 42 Transmission sprocket

Claims (3)

[Scope of utility model registration request] Claim 1: A fixed mast fixed to a vehicle body, a cargo handling tool that can be raised and lowered with respect to the fixed mast, a lifting chain that suspends the cargo handling tool so that the cargo handling tool can be raised and lowered, In a cargo handling device comprising a lifting cylinder for raising and lowering the cargo along a fixed mast, an endless lifting height detection chain is rotatably wound around the fixed mast, and a part of the lifting height detection chain is connected to the lifting cylinder. A lift height detection device for a cargo handling equipment, wherein the tool is fixed, and a lift height detector for detecting the movement amount of the lifting height detection chain is attached to the fixed mast to detect the lift height of the cargo handling equipment. . [Claim 2] A fixed mast fixed to the vehicle body, and an elevating mast attached to the fixed mast so as to be able to rise and fall freely;
A cargo handling device comprising a cargo handling tool that can be raised and lowered with respect to the lifting mast, a lifting chain that suspends the cargo handling tool so that the lifting mast can be raised and lowered, and a lifting cylinder that raises and lowers the lifting mast along a fixed mast. , an endless lifting height detection chain is rotatably wound around the lifting mast, a cargo handling tool is fixed to a part of the lifting height detection chain, and the lifting height detection chain is attached to the upper part of the fixed mast. 1. A lifting height detection device for a cargo handling device, characterized in that a lifting height detector is installed to detect the lifting height by detecting the amount of movement of the cargo handling equipment. [Claim 3] A fixed mast fixed to the vehicle body, and an elevating mast attached to the fixed mast so as to be movable up and down.
A cargo handling device comprising a cargo handling tool that can be raised and lowered with respect to the lifting mast, a lifting chain that suspends the cargo handling tool so that the lifting mast can be raised and lowered, and a lifting cylinder that raises and lowers the lifting mast. A first endless lift height detection chain is rotatably wound around the lifting mast, and an endless second lift height detection chain is rotatably wound around the lifting mast;
A cargo handling tool is fixed to a part of the second lifting height detection chain,
At the lower part of the lifting mast, there is a first transmission sprocket that meshes with the second lifting height detection chain, and a first transmission sprocket that meshes with the first lifting height detection chain and rotates synchronously with the first transmission sprocket to determine a second lifting height. A second transmission sprocket for transmitting the amount of movement of the detection chain to the first chain for detecting lift height is disposed at the lower part of the fixed mast, and the sprocket detects the amount of movement of the first chain for lifting height detection and lifts and lowers. A lift height detection device for a cargo handling equipment, characterized in that a lift height detector for detecting the lift height of a mast and cargo handling equipment is installed.