JPS6246896A - Jib crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a jib crane.

[Prior art and its problems]

As a conventional jib crane, for example, Japanese Patent Application Laid-Open No. 56-43
No. 191 (Japanese Patent Application No. 54-118426) Publication G shows the following.

Although such a jib crane is inexpensive because it is not large in size, it is not convenient to use because the support column is fixed to the floor and the area that can be lifted and transported by the hook block is extremely limited.

Therefore, an object of the present invention is to significantly expand the cargo handling area in a narrow space (for example, indoors).

C Structure of the Invention] In order to achieve such an object, the present invention provides a pair of rails with a cross section I shape whose lower portions are buried parallel to the floor, and which are arranged so as to sandwich the upper portions from both sides, and which slide with respect to the rails. A holder that is made to be freely movable and a support member for a pin that rotatably supports a wheel that slides on the upper end of each of the rails are integrated, and are hung vertically on the lower surface of a substantially rectangular base bracket at a distance from the front and back. However, a support is erected on the upper surface of the base bracket, and a jib is horizontally projected from the top of the support and is rotatably supported.

〔Example〕

Next, the configuration of an embodiment of the present invention will be explained using the drawings.

In the figure, 1 is the floor, 2, 2 is a pair of rails with a cross section of 3 whose lower part 2a is buried in the ground 1, and the distance between each rail 2, 2 is 720 mm, and they are arranged in parallel. ing. 3 is a holder arranged to sandwich the upper part 2b of the rails 2, 2 from both sides and is slidable on the rail 2.2, 4 is a holder that slides on the upper part 2b of the rails 2, 2. A wheel 5 is a support member that rotatably supports the wheel 4 and supports both ends of the shaft 5. The support member 6 and the holder 3 are integrally formed, and a substantially rectangular base bracket is provided. They are vertically installed on the lower surface 7a of 7, spaced apart from each other in the front and back. Reference numeral 8 denotes a column having a vertical length of 2500 mm, and is erected on the upper surface 7b of one side of the base bracket 7.

Reference numeral 9 indicates a rotation support device for the top portion 8a of the support column 80; 10 indicates a jib consisting of one beam with a total length of 1450 mm that is horizontally projected by the rotation support device 9 and supported horizontally rotatably; 11 is a jib 10; This is a trolley placed on top so that it can move freely. 12 is a drive device disposed on one of the wheels 4, 13 is a brake device for the wheel 4, and 14 is a power supply device.

In the holder 3, the shell plate 3a is made of a spring steel plate, and although it bends slightly when the support column 8 is bent due to the load applied to the trolley 11, it does not break, resulting in significantly improved durability. This shell plate 3a has spring steel plate ribs 3b, 3b.
are welded appropriately.

The wheel 4 has a cylindrical shape with one end having a larger diameter, and is arranged so as not to shift laterally from the upper part 2b of the rail 2.

The pillar 8 has an 11-shaped cross section and a side dimension of 200 mm.

The rotation support device 9 has brackets 9a, 9b, and 9c protruding from the top 8a of the column 8 at three locations spaced apart vertically, and the base 10a of the jib 10 is engaged between the first bracket 9a and the second bracket 9b. A cushioning rubber 15 is disposed between the second bracket 9b and the third bracket 9c.
A jib 10 is rotatably supported by a pin 16 inserted between the brackets 9a to 9C.

A base 10a of the jib 10 is rotatably supported by the rotation support device 9, and first and second motors 17 and 18 are fixed near the base 10a, and a free end 10b has a first motor on one side. .20-ra 19.20 is the 30th on the other side
- The rollers 21 are rotatably supported.

The trolley 11 has a rail 2 arranged on one side of the jib 10.
a first member 24 suspended by a roller 23 sliding on the second member 24; a second member 27 whose upper part is connected to the first member 24 by a pin 25 and has a hook 26 at its lower part;
One end of the wire 30 is supported by a rotor 29 that can be wound up and unwinded by the first motor 17, and the other end of the first wire 30 is supported by a pin 10C of the base 10a of the jib 10. The first chain 32 is rotatable on the wire 30, and the first chain 32 meshes with the gear of the shaft 31 rotated by the second motor 18. It is arranged on the other side and changes the direction of flow depending on the forward or reverse rotation direction of the second motor 18, forms a loop at the 30th roller 21, and changes the direction by the guide pin 33. Also, since the first member 24 is fixed to the part 34 of the first chain 32, the second moder 18
The second member 27 includes the base tOa side of the jib lO and the free end 10b.
Controlled to allow movement to each side.

The drive device 12 connects a shaft 43 of a third motor 40 disposed on the lower surface 7a of the base bracket 7 and a gear 41 formed on one shaft 5 of the wheel 4 with a second chain 42, and connects a switch (not shown) Therefore, by rotating the third motor 40 in either the forward or reverse direction, the wheel 4 is rotated, so the base bracket 7 is moved in the direction of rotation of the wheel 4.

The brake device 13 includes an operating mechanism 50 provided on the support column 8 and a brake drive mechanism 6 provided near one of the wheels 4.
0 and more. The operating mechanism 50 is connected to the base 5 of the support column 8.
1, an operating lever 53 rotatably supported on the base 51, and an operating lever 53 provided on the base 51.
3, and a wire 57 that is inserted through a bracket 56 provided on the operating lever 53 and has one end 57a supported. 58 is a fine adjustment device for finely adjusting the dimensions of the wire 57.

A roller 59 is supported by the support column 8 and guides the wire 57 downward. The deterrent drive mechanism 60
7, the other end 57b of which is supported by one end 61a, and the brake lever is rotatably supported by a pin 64 on a bracket 63 fixed to the rear end of a brake guide plate 62 provided on the support member 6. 61, a bushing rod 68 having a bolt 67 inserted through the gap 66 between the brake lever 61 and the plate 65. It consists of a brake shoe 70 which can be pressed by the head 69 and is arranged near the wheel 4. The iris fiber rake shoe 70 is made of brass square material with a side of 50 mm.

71 is a recess formed in the brake shoe 70 and has the same shape as the head 69 of the bushing rod 68, and 72 is a dead end hole 73 formed in the head 69 of the bushing rod 68 and a dead end hole 74 formed in the recess 71, respectively. It is a stopper bottle with both ends engaged. 75 is bolt 67
The gap between the plate 65 and the plate 65 can be adjusted by a nut screwed onto the plate 65. The gap between the brake guide plate 62 and the brake shoe 70 is 0.5 mm and is coated with grease. 76 is wire 5
7 branch members, which are arranged in one piece from one end 57a and are divided into left and right parts.

The base bracket 7 is formed in a rectangular shape, has lightweight holes 80 and 81, and has an inverted V-shaped cross section.
2.82 are arranged in parallel and can support a cylindrical object 83.

The power supply device 14 has a pin 90 at the top 8a of the support 8.
a flexible member 93 made of spring steel wire supported by a ball joint 92 at the upper end of the pillar 91; and a hanger provided at the free end of the flexible member 93. The hanger member 94 is engaged with a hanger rail 95 to which electricity is supplied. 96 is a harness.

Therefore, according to this jib crane, the wheel 4 can be rotated by the third motor 40 to freely change the position, and the jib 10 can be rotated at an appropriate position and some object 83 can be attached to the hook 26.
The jib crane can then be moved again. At this time, when the jib 10 receives the load of the object 83 and the support column 8 withstands it, the holder 3 that supports the support column 8 is made of a spring steel plate, so it absorbs the energy, and the object 83 weighing 1 ton is actually absorbed. We have confirmed that it is supportable.

Effect C] As explained above, the present invention allows movement on the upper part of the rail using the wheels provided on the base bracket, so the working range is significantly expanded. This has the practical effect of not being able to sufficiently withstand the load of the jib, which significantly increases the cargo handling load.

[Brief explanation of the drawing]

Fig. 1 is a front view of a jib crane according to an embodiment of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a view taken in the direction of the arrow in Fig. 1, and Figs. TV-TV line in Figure 1, V
-V cross-sectional view, Figure 6 is an enlarged view of the first gardening department, Figure 7 is a cross-sectional view of the *th *-■ line, Figure 8 is an enlarged view of the
9 and 10 are lines IX-IX and X of FIG. 8, respectively.
- It is an X-ray sectional view. 1...floor, 2...rail, 3...
...Holder, 4...Wheel, 5...Support member, 7...Base bracket, 8...
...Strut, IO... Jib. Patent applicant Mitsuo Iwatate'Km ff'TS-eup

Claims (1)

[Claims] A holder arranged to sandwich the upper parts of a pair of rails having an I-shaped cross section with their lower parts buried parallel to the floor from both sides and capable of sliding freely with respect to the rails; A support member for a pin that rotatably supports a sliding wheel is integrated with the support member, and is vertically hung from the bottom surface of a substantially rectangular base bracket at a distance from the front and back, and a column is erected from the top surface of the base bracket. A jib crane characterized by having a jib horizontally protruding from the top of a support column and rotatably supported.