Lifter

Abstract

To provide a lifter that is able to prevent occurrence of torsional deformation in a first arm.SOLUTION: This lifter includes a dolly 1, a column member 2 standing on the dolly 1, and a support-target supporting member 3 provided on the column member 2. The support-target supporting member 3 includes a pair of first arms 301 provided on the column member 2 so as to be capable of being lifted / lowered; and a pair of second arms 302 provided one by one on each of the pair of first arms 301. Each of the pair of second arms 302 is slidable with respect to a corresponding one first arm 301 of the pair of first arms 301 in a longitudinal direction of the first arm 301. The support-target supporting member 3 further includes a first-arm first connecting member 304 that connects the pair of first arms 301 at a position apart from the column member 2.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] This disclosure relates to a lifter.

Background Art

[0002] Conventionally, a lifter including a carriage, a column member, and a supported object support member for supporting a supported object has been known. The column member is erected on the carriage. The supported object support member is provided on the column member so as to be movable up and down. The supported object support member has a pair of first arms and a pair of second arms provided one by one on each of the pair of first arms. Each of the pair of second arms is slidable with respect to the corresponding first arm of the pair of first arms. When the second arm slides with respect to the first arm, the supported object support member expands and contracts. A supported object is placed on the second arm (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the configuration described in Patent Document 1, in the width direction of the carriage, the second arms are arranged adjacent to the first arms. As a result, when a supported object is placed on the second arm, the first arm is likely to be torsionally deformed. When the first arm is torsionally deformed, there is a problem that it becomes difficult for the second arm to slide with respect to the first arm.

[0005] This disclosure has been made to solve the above-described problems, and an object thereof is to provide a lifter capable of suppressing torsional deformation of the first arm.

Means for Solving the Problems

[0006] The lifter according to this disclosure comprises a trolley, a column member erected on the trolley, and a support member for an object to be supported provided on the column member. The support member for an object to be supported has a pair of first arms that are vertically movable on the column member, and a pair of second arms provided on each of the pair of first arms. Each of the pair of second arms is slidable in the longitudinal direction of the first arm relative to the corresponding first arm of the pair of first arms. The support member for an object to be supported further has a first arm first connecting member that connects the pair of first arms at a position away from the column member. [Effects of the Invention]

[0007] The lifter according to this disclosure can suppress torsional deformation in the first arm. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view showing the first state of the lifter according to Embodiment 1. [Figure 2] This is a side view showing the second state of the lifter according to Embodiment 1. [Figure 3] This is a perspective view showing the main parts of the lifter according to Embodiment 1. [Figure 4] This is a perspective view showing the main parts of the lifter according to Embodiment 2. [Figure 5] Figure 4 is a perspective view showing a modified example of the suspension member. [Figure 6] This is a perspective view showing the main parts of the lifter according to Embodiment 3. [Figure 7] Figure 6 is an enlarged perspective view showing the second stopper and the second magnet. [Figure 8] Figure 6 is a perspective view showing the contact area. [Figure 9] Figure 8 is a plan view showing the contact area. [Figure 10] Figure 8 is a front view showing the contact area. [Figure 11]It is a side view showing the support object bottom plate inclination suppression member of FIG. 6. [Figure 12] It is a perspective view showing the main part of the lifter according to Embodiment 4. [Figure 13] It is a perspective view showing the main part of the lifter according to Embodiment 5. [Figure 14] It is a perspective view showing the first state of the push-pull cable of FIG. 13. [Figure 15] It is a perspective view showing the second state of the push-pull cable of FIG. 13. [Figure 16] It is a side view showing the third stopper at the movement restriction position of FIG. 13. [Figure 17] It is a side view showing the third stopper at the restriction release position of FIG. 13. [Figure 18] It is a side view showing the lifter according to Embodiment 6. [Figure 19] It is a cross-sectional view taken along the line XIX-XIX of FIG. 18. [Figure 20] It is a front view showing the main part of the lifter according to Embodiment 7. [Figure 21] It is a front view showing the state where the rotating part of FIG. 20 has rotated 90 degrees.

Mode for Carrying Out the Invention

[0009] Embodiment 1. FIG. 1 is a side view showing the first state of the lifter according to Embodiment 1. FIG. 2 is a side view showing the second state of the lifter according to Embodiment 1. FIG. 3 is a perspective view showing the main part of the lifter according to Embodiment 1. The lifter according to Embodiment 1 includes a cart 1, a column member 2, a support object support member 3, a brake 4, a balance weight 5, an operation handle 6, and a grip 7.

[0010] The cart 1 has a base 101, a pair of legs 102, a pair of front wheels 103, and a pair of rear wheels 104. Let the moving direction of the cart 1 when viewed from above be the front-rear direction D1 of the cart 1. Let the direction perpendicular to the front-rear direction D1 of the cart 1 when viewed from above be the width direction D2 of the cart 1.

[0011] The base 101 extends in the width direction D2 of the carriage 1. The pair of legs 102 are separated from each other in the width direction D2. Also, the pair of legs 102 face each other in the width direction D2. Each of the pair of legs 102 extends from the base 101 in the front-rear direction D1.

[0012] The pair of front wheels 103 are rotatably provided one by one on each of the pair of legs 102. The pair of rear wheels 104 are rotatably provided on the column member 2. As the front wheels 103 and the rear wheels 104 roll on the floor surface 8, the carriage 1 moves in the front-rear direction D1. The front wheels 103 and the rear wheels 104 are the wheels of the carriage 1.

[0013] The column member 2 is erected on the base 101. The column member 2 is fixed to the base 101. Therefore, the column member 2 moves in the front-rear direction D1 together with the carriage 1.

[0014] The support object support member 3 has a pair of first arms 301 and a pair of second arms​​​​​​​The overall dimension of the first arm 301 and the second arm 302 in the front-rear direction D1 is denoted as the overall arm dimension L. By sliding the second arm 302 relative to the first arm 301, the second arm 302 moves between a first position where the overall arm dimension L is the first dimension L1 and a second position where the overall arm dimension L is the second dimension L2, which is larger than the first dimension L1. When the second arm 302 is in the first position, the lifter is in the first state, and when the second arm 302 is in the second position, the lifter is in the second state.

[0017] Brake 4 is provided on the column member 2. Brake 4 is operated by the operator using the lifter. When brake 4 is operated, it moves between a wheel braking position that brakes the rear wheels 104 and a brake release position where the brake on the rear wheels 104 is released. When the rear wheels 104 are braked by brake 4, the movement of the trolley 1 in the longitudinal direction D1 is suppressed.

[0018] The balance weight 5 is provided on the column member 2. In the front-rear direction D1, the balance weight 5 is positioned on the opposite side of the column member 2 from the second arm 302.

[0019] The operating handle 6 is provided on the column member 2. The operating handle 6 is operated by the operator using the lifter. When the operating handle 6 is operated, a pair of first arms 301 move up and down relative to the column member 2. In other words, when the operating handle 6 is operated, the support member 3 for the object to be supported moves up and down relative to the column member 2. This causes the object to be supported 9 to move up and down. The object to be supported 9 is then stored in the storage container 10 via the lifter.

[0020] The handle 7 is provided on the column member 2. The handle 7 is grasped by the worker using the lifter. While holding the handle 7, the worker moves the lifter in the forward / backward direction D1.

[0021] The object support member 3 further comprises a slide rail 303, a first arm first connecting member 304, a second arm connecting member 305, a first stopper 306, a second stopper 307, a fixing device 308, and an acceleration suppression device 309.

[0022] In the width direction D2, the first arm 301 and the second arm 302 are adjacent to each other. The slide rail 303 is positioned between the first arm 301 and the second arm 302 in the width direction D2. The slide rail 303 has a slide fixing portion 310 fixed to the first arm 301 and a slide movable portion 311 fixed to the second arm 302. The slide fixing portion 310 is fixed to the first arm 301 via a plurality of screws (not shown). The slide movable portion 311 is fixed to the second arm 302 via a plurality of screws (not shown).

[0023] Each of the sliding fixed portion 310 and the sliding movable portion 311 extends in the longitudinal direction D1. The sliding movable portion 311 has a plurality of rollers (not shown) that roll on the sliding fixed portion 310. As the plurality of rollers roll on the sliding fixed portion 310, the sliding movable portion 311 moves in the longitudinal direction D1 relative to the sliding fixed portion 310. As the sliding movable portion 311 moves in the longitudinal direction D1 relative to the sliding fixed portion 310, the second arm 302 slides in the longitudinal direction D1 relative to the first arm 301.

[0024] The first arm first connecting member 304 extends in the width direction D2. The first arm first connecting member 304 connects a pair of first arms 301 at a position away from the column member 2. The first arm first connecting member 304 is formed in the shape of a round bar. A screw groove 312 is formed on the outer circumferential surface of the longitudinal end of the first arm first connecting member 304. The first arm 301 has a through hole 313 into which the first arm first connecting member 304 is inserted. With the end of the first arm first connecting member 304 inserted into the through hole 313, the first arm first connecting member 304 is fixed to the first arm 301 by attaching a nut (not shown) to the first arm first connecting member 304.

[0025] The second arm connecting member 305 connects a pair of second arms 302 at a position further from the column member 2 than the first arm connecting member 304. The second arm connecting member 305 includes a frame 314, a connecting plate 315, and a shackle member 316.

[0026] The frame 314 extends in the width direction D2. The connecting plate 315 connects the frame 314 to the second arm 302. The shackle member 316 connects the frame 314 to the object to be supported 9. The object to be supported 9 is suspended from the second arm 302 via the second arm connecting member 305. Therefore, the second arm connecting member 305 has the function of supporting the object to be supported 9 on the second arm 302.

[0027] The connecting plate 315 can be selectively attached to the second arm 302 at different positions in the front-rear direction D1. The operator selects the attachment position of the connecting plate 315 to the second arm 302 according to the shape of the object to be supported 9. Figure 3 shows the connecting plate 315 being attached to the attachment position further away from the column member 2 in one of the pair of attachment positions for the connecting plate 315.

[0028] When the object to be supported 9 is suspended from the second arm 302, a torsional force is generated in the first arm 301 around a straight line passing through its center and extending in the front-rear direction D1. The first arm first connecting member 304 connects the pair of first arms 301, thereby suppressing torsional deformation in the first arm 301.

[0029] Furthermore, when the object to be supported 9 is suspended from the second arm 302, a torsional force is generated in the second arm 302 centered on a straight line extending in the front-rear direction D1 through the center of the second arm 302. The second arm connecting member 305 connects the pair of second arms 302, thereby suppressing torsional deformation of the second arm 302.

[0030] The first stopper 306 and the second stopper 307 are each fixed to the first arm 301. The first stopper 306 and the second stopper 307 are positioned apart from each other in the front-rear direction D1. The first stopper 306 and the second stopper 307 are facing each other in the front-rear direction D1.

[0031] The second arm 302 has a second arm body 317 and a contact portion 318. The second arm body 317 is attached to the sliding movable portion 311. The contact portion 318 is attached to the second arm body 317. The contact portion 318 is positioned between the first stopper 306 and the second stopper 307 in the front-rear direction D1.

[0032] When the overall arm dimension L is the first dimension L1, the contact portion 318 contacts the first stopper 306. By contacting the first stopper 306, the first stopper 306 restricts the movement of the second arm 302 relative to the first arm 301 in a direction that makes the overall arm dimension L smaller than the first dimension L1.

[0033] When the overall arm dimension L is equal to the second dimension L2, the contact portion 318 contacts the second stopper 307. By contacting the second stopper 307, the second stopper 307 restricts the movement of the second arm 302 relative to the first arm 301 in a direction in which the overall arm dimension L is greater than the second dimension L2.

[0034] The fixing device 308 fixes the second arm 302 and the first stopper 306 in the first position, or fixes the second arm 302 and the second stopper 307 in the second position. In the lifter according to Embodiment 1, the fixing device 308 is made of bolts. When the fixing device 308 is provided across the second arm 302 and the first stopper 306, the second arm 302 and the first stopper 306 are fixed to each other. This maintains the position of the second arm 302 in the first position. On the other hand, when the fixing device 308 is provided across the second arm 302 and the second stopper 307, the second arm 302 and the second stopper 307 are fixed to each other. This maintains the position of the second arm 302 in the second position.

[0035] The acceleration suppression device 309 includes a friction member support member 319 and a friction member 320. The friction member support member 319 is attached to the second arm 302 via a plurality of screws (not shown). The friction member 320 is attached to the friction member support member 319. Therefore, as the second arm 302 moves relative to the first arm 301, the friction member 320 moves relative to the first arm 301 and the slide fixing part 310. The friction member 320 is positioned to contact the slide fixing part 310. The contact of the friction member 320 with the slide fixing part 310 suppresses the increase in the movement speed of the second arm 302 relative to the first arm 301.

[0036] The acceleration suppression device 309 further includes a constant-load spring device 321. The constant-load spring device 321 is connected to the first arm 301 and the second arm 302. The constant-load spring device 321 includes a constant-load spring and a drum around which the constant-load spring is wound. By connecting the constant-load spring device 321 to the first arm 301 and the second arm 302, a constant load is applied between the first arm 301 and the second arm 302 in the direction that the second arm 302 moves from the second position to the first position. As a result, when the second arm 302 moves from the first position to the second position, the increase in the movement speed of the second arm 302 relative to the first arm 301 is suppressed.

[0037] Next, the procedure for storing the object to be supported 9 in the storage container 10 using the lifter according to Embodiment 1 will be described. First, the operator sets the brake 4 to the wheel braking position and the second arm 302 to the first position, and then has the object to be supported 9, which is placed on the floor surface 8, supported by the second arm 302.

[0038] Subsequently, the worker operates the control handle 6 to raise the support member 3 for the object to be supported, thereby raising the object to be supported 9.

[0039] Subsequently, the worker moves brake 4 to the brake release position. This allows the lifter supporting the object 9 to move in the front-rear direction D1.

[0040] Subsequently, the worker moves the lifter around the storage container 10 and sets the brake 4 to the wheel braking position.

[0041] Subsequently, the worker moves the second arm 302 from the first position to the second position, positioning the object to be supported 9 above the storage container 10.

[0042] Subsequently, the operator operates the control handle 6 to lower the support member 3 for the object to be supported, and stores the object to be supported 9 in the storage container 10. This completes the procedure for storing the object to be supported 9 in the storage container 10 using the lifter.

[0043] As described above, the lifter according to Embodiment 1 comprises a trolley 1, a column member 2 erected on the trolley 1, and a support member 3 provided on the column member 2. The support member 3 has a pair of first arms 301 that are vertically movable on the column member 2, and a pair of second arms 302, one of which is provided on each of the pair of first arms 301. Each of the pair of second arms 302 is slidable in the longitudinal direction of the first arm 301 relative to the corresponding first arm 301 of the pair of first arms 301. The support member 3 has a first arm first connecting member 304 that connects the pair of first arms 301 at a position away from the column member 2. With this configuration, the first arm first connecting member 304 connects the pair of first arms 301. This makes it possible to suppress torsional deformation of the first arms 301.

[0044] Furthermore, in the lifter according to Embodiment 1, the support member 3 for the object to be supported has a second arm connecting member 305 that connects a pair of second arms 302 at a position further from the column member 2 than the first arm first connecting member 304. With this configuration, the second arm connecting member 305 connects the pair of second arms 302. This makes it possible to suppress torsional deformation in the second arms 302.

[0045] Furthermore, in the lifter according to Embodiment 1, the second arm 302 moves between a first position and a second position by sliding relative to the first arm 301. The first position is the position of the second arm 302 where the overall arm dimension L is the first dimension L1, and the second position is the position of the second arm 302 where the overall arm dimension L is the second dimension L2, which is larger than the first dimension L1. The support member 3 for the object to be supported has a first stopper 306 and a second stopper 307. The first stopper 306 restricts the movement of the second arm 302 relative to the first arm 301 in the direction in which the overall arm dimension L is smaller than the first dimension L1. The second stopper 307 restricts the movement of the second arm 302 relative to the first arm 301 in the direction in which the overall arm dimension L is larger than the second dimension L2. With this configuration, the position of the second arm 302 can be restricted between the first position and the second position. This allows the overall arm dimension L to be limited to between the first dimension L1 and the second dimension L2.

[0046] Furthermore, in the lifter according to Embodiment 1, the support member 3 for the object to be supported has a fixing device 308 that fixes the second arm 302 in the first position to the first stopper 306, or fixes the second arm 302 in the second position to the second stopper 307. With this configuration, the position of the second arm 302 can be maintained in the first position or the second position.

[0047] Furthermore, in the lifter according to Embodiment 1, the support member 3 for the object to be supported has an acceleration suppression device 309 that suppresses the increase in the movement speed of the second arm 302 relative to the first arm 301. With this configuration, when the second arm 302 slides relative to the first arm 301, it is possible to suppress the increase in the movement speed of the second arm 302. This makes it possible to mitigate the impact when the second arm 302 hits the first stopper 306 or the second stopper 307.

[0048] In the above embodiment 1, the acceleration suppression device 309 was described in a configuration that includes a friction member support member 319 and a friction member 320, and a constant load spring device 321. However, the acceleration suppression device 309 may also be configured to include either the friction member support member 319 and the friction member 320, or the constant load spring device 321.

[0049] Furthermore, in the above embodiment 1, a configuration was described in which the object to be supported 9 is suspended from the second arm 302. However, a configuration in which the object to be supported 9 is placed on the second arm 302 is also possible.

[0050] Embodiment 2. Figure 4 is a perspective view showing the main parts of the lifter according to Embodiment 2. In the lifter according to Embodiment 2, the object support member 3 has a first arm second connecting member 322 and a suspension member 323.

[0051] The first arm second connecting member 322 connects the pair of first arms 301 at a position further from the column member 2 than the first arm first connecting member 304. The first arm second connecting member 322 is formed in the shape of a round bar. A screw groove 324 is formed on the outer circumferential surface of the longitudinal end of the first arm second connecting member 322. The first arm 301 has a groove 325 into which the first arm second connecting member 322 is inserted. With the end of the first arm second connecting member 322 inserted into the groove 325, the first arm second connecting member 322 is fixed to the first arm 301 by attaching a nut (not shown) to the first arm second connecting member 322.

[0052] In the lifter according to Embodiment 2, the object support member 3 does not have a second arm connecting member 305.

[0053] The suspension member 323 has the function of supporting the object to be supported 9 on the second arm 302. The suspension member 323 includes a frame 326, a pair of U-shaped members 327, and a pair of hook members 328.

[0054] The frame 326 extends in the width direction D2. A pair of U-shaped members 327 are spaced apart from each other in the width direction D2. Each U-shaped member 327 is provided on the frame 326. A pair of hook members 328 are spaced apart from each other in the width direction D2. Each hook member 328 is provided on the frame 326. An object to be supported 9 is hung on each hook member 328.

[0055] In the front-rear direction D1, a pair of through holes 329 are formed at different positions on the second arm 302. The U-shaped member 327 can be selectively inserted into either of the pair of through holes 329. By inserting the U-shaped member 327 into either of the pair of through holes 329, the suspension member 323 is suspended from the second arm 302. Depending on the shape of the object to be supported 9, the worker selects the mounting position of the suspension member 323 on the second arm 302.

[0056] The other configurations of the lifter according to Embodiment 2 are the same as those of the lifter according to Embodiment 1.

[0057] As described above, in the lifter according to Embodiment 2, the support member 3 for the object to be supported has a pair of first arms 301 that are vertically movable on the column member 2, and a pair of second arms 302 that are provided on each of the pair of first arms 301. Each of the pair of second arms 302 is slidable in the longitudinal direction of the first arm 301 relative to the corresponding first arm 301 of the pair of first arms 301. The support member 3 for the object to be supported has a first arm second connecting member 322 that connects the pair of first arms 301 at a position further from the column member 2 than the first arm first connecting member 304. With this configuration, the first arm second connecting member 322 connects the pair of first arms 301. This makes it possible to more reliably suppress torsional deformation of the first arms 301.

[0058] In the lifter according to Embodiment 2, the suspension member 323 was described as having a frame 326, a U-shaped member 327, and a hook member 328. However, as shown in Figure 5, the suspension member 323 may also have a frame 326, a U-shaped member 327, and a shackle member 330. In this case, the shackle member 330 connects the frame 326 to the object to be supported 9.

[0059] Embodiment 3. Figure 6 is a perspective view showing the main parts of the lifter according to Embodiment 3. In the lifter according to Embodiment 3, the second arm 302 has a through hole 331 into which the second arm connecting member 305 is inserted. The second arm connecting member 305 is formed in the shape of a round bar. With the end of the second arm connecting member 305 inserted into the through hole 331, the second arm connecting member 305 is fixed to the second arm 302 by attaching a nut (not shown) to the second arm connecting member 305.

[0060] The second arm 302 has a pair of grooves 332 formed therein. The pair of grooves 332 are located at different positions in the front-rear direction D1. The U-shaped member 327 can be selectively inserted into the pair of grooves 332. By inserting the U-shaped member 327 into either of the pair of grooves 332, the suspension member 323 is suspended from the second arm 302. The operator selects the mounting position of the suspension member 323 on the second arm 302, corresponding to the shape of the object to be supported 9.

[0061] In the lifter according to Embodiment 3, the fixing device 308 includes a first magnet 333 provided on the first stopper 306 and a second magnet 334 provided on the second stopper 307.

[0062] Figure 7 is an enlarged perspective view showing the second stopper 307 and the second magnet 334 of Figure 6. The second stopper 307 has a first L-shaped plate 335 fixed to the first arm 301 and a second L-shaped plate 336 fixed to the first L-shaped plate 335. The first L-shaped plate 335 is fixed to the first arm 301 via a plurality of screws (not shown). The second magnet 334 is fixed to the second L-shaped plate 336. As shown in Figure 6, the friction member support member 319 is fixed to the second L-shaped plate 336 via a plurality of screws (not shown).

[0063] Figure 8 is a perspective view showing the contact portion 318 of Figure 6. Figure 9 is a plan view showing the contact portion 318 of Figure 8. Figure 10 is a front view showing the contact portion 318 of Figure 8. In the lifter according to Embodiment 3, the fixing device 308 further comprises a third magnet 337 and a fourth magnet 338.

[0064] The third magnet 337 and the fourth magnet 338 are fixed to the contact portion 318. The third magnet 337 is positioned to face the first magnet 333 in the front-rear direction D1. The fourth magnet 338 is positioned to face the second magnet 334 in the front-rear direction D1.

[0065] When the second arm 302 is in the first position, the third magnet 337 is in contact with the first magnet 333. The third magnet 337 and the first magnet 333 are magnetized to attract each other. Therefore, when the second arm 302 is in the first position, the third magnet 337 and the first magnet 333 attract each other. This fixes the second arm 302 and the first stopper 306 in the first position to each other. Thus, the position of the second arm 302 is maintained in the first position.

[0066] When the second arm 302 is in the second position, the fourth magnet 338 contacts the second magnet 334. The fourth magnet 338 and the second magnet 334 are magnetized to attract each other. Therefore, when the second arm 302 is in the second position, the fourth magnet 338 and the second magnet 334 attract each other. This fixes the second arm 302 and the second stopper 307 in the second position to each other. Thus, the position of the second arm 302 is maintained in the second position.

[0067] In the lifter according to Embodiment 3, the support member 3 for the object to be supported has a support base plate tilt suppression member 339. The support base plate tilt suppression member 339 is attached to the second arm 302.

[0068] Figure 11 is a side view showing the support object bottom plate inclination suppression member 339 in Figure 6. The support object bottom plate inclination suppression member 339 is used when the support object 9 is eccentric. When the support object 9 is eccentric, the bottom plate 902 of the frame 901 of the support object 9 is inclined with respect to the horizontal plane. The support object bottom plate inclination suppression member 339 pushes the bottom plate 902 downward to suppress the inclination of the bottom plate 902 of the frame 901 of the support object 9 with respect to the horizontal plane.

[0069] The other configurations of the lifter according to Embodiment 3 are the same as those of the lifter according to Embodiment 2.

[0070] As described above, in the lifter according to Embodiment 3, the support member 3 for the object to be supported has a support object bottom plate inclination suppression member 339 provided on the second arm 302. The support object bottom plate inclination suppression member 339 pushes the bottom plate 902 downward so as to suppress the bottom plate 902 of the frame 901 of the object to be supported from inclining with respect to the horizontal plane. With this configuration, it is possible to suppress the inclination of the bottom plate 902 with respect to the horizontal plane when the object to be supported 9 is eccentric. As a result, the second arm 302 can be moved between the first position and the second position while the bottom plate 902 is aligned with the horizontal plane.

[0071] Embodiment 4. Figure 12 is a perspective view showing the main parts of the lifter according to Embodiment 4. In the lifter according to Embodiment 4, the object support member 3 has a frame fixing member 340 that is fixed to the frame 901 of the object 9.

[0072] The frame fixing member 340 has a pair of side support plate portions 341, a plurality of hook portions 342, a plurality of fixing portions 343, and a pair of support beam portions 344.

[0073] The pair of side support plates 341 are provided one on each of the pair of opposing inner wall surfaces of the frame 901. Figure 12 shows one of the pair of side support plates 341.

[0074] The hook portion 342 is fixed to the side support plate portion 341. The hook portion 342 is inserted into a hole 903 formed in the wall surface of the frame 901. The fixing portion 343 is hung on the frame 901. The side support plate portion 341 is fixed to the fixing portion 343. The fixing portion 343 restricts the side support plate portion 341 from moving away from the wall surface of the frame 901. This prevents the hook portion 342 from coming out of the hole 903.

[0075] A pair of support beams 344 are arranged apart from each other in the front-rear direction D1. The pair of support beams 344 are provided across a pair of side support plates 341. Each of the pair of support beams 344 is fixed to each of the pair of side support plates 341. Each support beam 344 rests on a second arm 302. The second arm 302 supports the frame fixing member 340 inside the frame 901.

[0076] In the lifter according to Embodiment 4, the object support member 3 has a second arm connecting member 305. The second arm connecting member 305 connects a pair of second arms 302 at a position further from the column member 2 than the first arm connecting member 304. The second arm connecting member 305 has a frame 314 and a handle 345. The handle 345 is attached to the frame 314. In the lifter according to Embodiment 4, the second arm connecting member 305 does not have the function of supporting the object 9 on the second arms 302.

[0077] The other configurations of the lifter according to Embodiment 4 are the same as those of the lifter according to Embodiment 3.

[0078] As described above, in the lifter according to Embodiment 4, the object support member 3 has a frame fixing member 340 that is fixed to the frame 901 of the object to be supported 9. The second arm 302 supports the frame fixing member 340 inside the frame 901. With this configuration, even if there is only space inside the storage container 10 to store the object to be supported 9, the object to be supported 9 can be supported and stored in the storage container 10.

[0079] Embodiment 5. Figure 13 is a perspective view showing the main parts of the lifter according to Embodiment 5. In the lifter according to Embodiment 5, the support member 3 for the object to be supported includes a push-pull cable 346 and a third stopper 347.

[0080] Figure 14 is a perspective view showing the first state of the push-pull cable 346 in Figure 13. Figure 15 is a perspective view showing the second state of the push-pull cable 346 in Figure 13. The push-pull cable 346 is in the first state when the brake 4 is in the wheel braking position. On the other hand, the push-pull cable 346 is in the second state when the brake 4 is in the brake release position.

[0081] Figure 16 is a side view showing the third stopper 347 in the movement-restricted position as shown in Figure 13. Figure 17 is a side view showing the third stopper 347 in the restriction-release position as shown in Figure 13. The third stopper 347 moves between the movement-restricted position and the restriction-release position. The second arm 302 has a groove 348 into which the third stopper 347 is inserted.

[0082] The third stopper 347 includes a rotating member 349 and a first pin 350 provided on the rotating member 349. When the third stopper 347 is in a movement-restricting position, the first pin 350 is inserted into the groove 348. Therefore, when the third stopper 347 is in a movement-restricting position, the first pin 350 contacts the second arm 302 in the first position, thereby restricting the second arm 302 from moving toward the second position.

[0083] When the third stopper 347 is in the release position, the first pin 350 is pulled out of the groove 348. Therefore, when the third stopper 347 is in the release position, contact between the second arm 302 and the first pin 350 is released. This releases the restriction on the movement of the second arm 302 toward the second position.

[0084] The third stopper 347 receives power from the operation of the brake 4 via the push-pull cable 346. When the push-pull cable 346 is in the first state, the position of the third stopper 347 becomes the movement-restricted position. When the push-pull cable 346 is in the second state, the position of the third stopper 347 becomes the restriction-release position. Therefore, when the brake 4 is braking the rear wheel 104, the position of the third stopper 347 becomes the restriction-release position, and when the rear wheel 104 is not being braked by the brake 4, the position of the third stopper 347 becomes the movement-restricted position.

[0085] The support member 3 for the object to be supported further includes a second pin 351, a fourth stopper 352, a fifth stopper 353, a third pin 354, and a tension spring 355.

[0086] The second pin 351 is provided on the first arm 301. The second pin 351 extends in the width direction D2. The rotating member 349 is attached to the second pin 351. The third stopper 347 rotates around the second pin 351. By rotating the third stopper 347, the third stopper 347 moves between a movement-restricted position and a movement-released position.

[0087] The fourth stopper 352 is provided on the first arm 301. The third stopper 347, which is in a movement-restricted position, contacts the fourth stopper 352. The fifth stopper 353 is provided on the first arm 301. The third stopper 347, which is in an unrestricted position, contacts the fifth stopper 353. The movement range of the third stopper 347 is restricted by the fourth stopper 352 and the fifth stopper 353.

[0088] The third pin 354 is provided on the first arm 301. A tension spring 355 is connected to the first pin 350 and the third pin 354. The positions of the first pin 350 and the third pin 354 are such that the distance between them is greatest at an intermediate point where the third stopper 347 moves between a restricted position and an unrestricted position. As a result, when power is not transmitted to the third stopper 347 via the push-pull cable 346, the elastic force of the tension spring 355 causes the third stopper 347 to move to either the restricted position or the unrestricted position.

[0089] Other configurations of the lifter according to Embodiment 5 are the same as those of the lifter according to Embodiment 1. In addition, in the lifter according to Embodiment 5, the object support member 3 may have a suspension member 323, similar to the lifter according to Embodiment 2. Also, in the lifter according to Embodiment 5, the object support member 3 may have an object bottom plate inclination suppression member 339, similar to the lifter according to Embodiment 3. Furthermore, in the lifter according to Embodiment 5, the object support member 3 may have a frame fixing member 340 that is fixed to the frame 901 of the object 9, similar to the lifter according to Embodiment 4.

[0090] As described above, in the lifter according to Embodiment 5, the support member 3 for the object to be supported has a third stopper 347 that moves between a movement-restricted position and a movement-release position. When the third stopper 347 is in the movement-restricted position, the first pin 350 of the third stopper 347 contacts the second arm 302 in the first position, thereby restricting the second arm 302 from moving toward the second position. When the third stopper 347 is in the movement-release position, the contact between the second arm 302 and the first pin 350 of the third stopper 347 is released. Power from the operation of the brake 4 is transmitted to the third stopper 347. When the brake 4 is braking the rear wheel 104, the position of the third stopper 347 becomes the movement-release position, and when the rear wheel 104 is not being braked by the brake 4, the position of the third stopper 347 becomes the movement-restricted position. With this configuration, the second arm 302 can be moved from the first position to the second position only when the brake 4 is braking the rear wheel 104. This prevents the second arm 302 from moving from the first position to the second position when the brake 4 is not braking the rear wheel 104.

[0091] Embodiment 6. Figure 18 is a side view showing a lifter according to Embodiment 6. Figure 19 is a cross-sectional view taken along the line XIX-XIX in Figure 18. The lifter according to Embodiment 6 further comprises an additional balance weight support member 11 and an additional balance weight 12.

[0092] The additional balance weight support member 11 is detachably attached to the base 101 of the trolley 1. The base 101 of the trolley 1 has an insertion opening 105. The additional balance weight support member 11 is attached to the base 101 by being inserted into the insertion opening 105. The additional balance weight support member 11 is removed from the base 101 by being pulled out of the insertion opening 105.

[0093] The additional balance weight 12 is provided on the additional balance weight support member 11. In the front-rear direction D1, the additional balance weight 12 is positioned on the opposite side of the column member 2 from the second arm 302. The operator of the lifter adjusts the weight of the additional balance weight 12 to match the weight of the supported object 9 suspended from the second arm 302.

[0094] The other configurations of the lifter according to Embodiment 6 are the same as those of the lifter according to any of Embodiments 1 to 5.

[0095] As described above, the lifter according to Embodiment 6 includes an additional balance weight support member 11 that is detachably attached to the trolley 1, and an additional balance weight 12 that is attached to the additional balance weight support member 11. The additional balance weight 12 is positioned in the front-rear direction D1 on the side opposite to the second arm 302 relative to the column member 2. With this configuration, the additional balance weight 12 can be attached to and detached from the trolley 1 according to the weight of the object to be supported 9. This makes it possible to maintain the balance of the lifter supporting the object to be supported 9 in the front-rear direction D1.

[0096] Embodiment 7. Figure 20 is a front view showing the main parts of the lifter according to Embodiment 7. In the lifter according to Embodiment 7, the object support member 3 further includes a rotating part 356 and a suspension member 357.

[0097] The rotating part 356 is provided on the second arm connecting member 305. The rotating part 356 rotates about an axis extending in the vertical direction. The rotating part 356 is capable of rotating 180 degrees. The rotating part 356 can be fixed to the second arm 302 at a preset rotation position. In this example, the preset rotation positions are 0 degrees, 90 degrees, and 180 degrees.

[0098] The suspension member 357 is supported by the rotating part 356. The suspension member 357 has the function of supporting the object to be supported 9 on the second arm 302 via the rotating part 356. The suspension member 357 has a frame 358 and a pair of shackle members 359.

[0099] The frame 358 is mounted on the rotating part 356. Therefore, the frame 358 rotates together with the rotating part 356. A pair of shackle members 359 are positioned apart from each other in the longitudinal direction of the frame 358. Each of the pair of shackle members 359 is attached to the frame 358. A support object 9 is suspended from each of the pair of shackle members 359.

[0100] Figure 21 is a front view showing the rotating part 356 of Figure 20 rotated by 90 degrees. In Figure 21, the long member, the support object 9, is positioned so that its longitudinal direction coincides with the front-to-back direction D1. If the longitudinal dimension of the support object 9 is greater than the distance between the pair of legs 102, the support object 9 is positioned between the pair of legs 102 with its longitudinal direction coinciding with the front-to-back direction D1.

[0101] If the longitudinal direction of the object to be supported 9 coincides with the width direction of the opening of the storage container 10, it is necessary to align the longitudinal direction of the object to be supported 9 with the width direction D2 before inserting the object to be supported 9 into the opening of the storage container 10. Therefore, the state of the object to be supported 9, which is suspended from the floor surface 8, needs to be changed from a state in which the longitudinal direction of the object to be supported 9 coincides with the front-to-back direction D1 to a state in which the longitudinal direction of the object to be supported 9 coincides with the width direction D2.

[0102] The operator of the lifter rotates the rotating part 356 by 90 degrees while the object to be supported 9 is suspended from the floor surface 8. This causes the longitudinal direction of the object to be supported 9 to coincide with the width direction D2. Therefore, the object to be supported 9 can be inserted into the opening of the storage container 10.

[0103] The other configurations of the lifter according to Embodiment 7 are the same as those of the lifter according to any of Embodiments 1 to 6.

[0104] As described above, in the lifter according to Embodiment 7, the support member 3 for the object to be supported has a rotating part 356 and a suspension member 357. The rotating part 356 is supported by a pair of second arms 302. The rotating part 356 rotates about an axis extending in the vertical direction. The suspension member 357 is supported by the rotating part 356. The object to be supported 9 is suspended from the suspension member 357. With this configuration, the object to be supported 9 suspended from the lifter can be rotated and inserted into the opening of the storage container 10. [Explanation of Symbols]

[0105] 1. Trolley, 2. Column member, 3. Supported object support member, 4. Brake, 5. Balance weight, 6. Operating handle, 7. Handle, 8. Floor surface, 9. Supported object, 10. Storage container, 11. Additional balance weight support member, 12. Additional balance weight, 101. Base, 102. Legs, 103. Front wheel, 104. Rear wheel, 105. Insertion port, 301. First arm, 302. Second arm, 303. Slide rail, 304. First arm first connecting member, 305. Second arm connecting member, 306. First stopper, 307. Second stopper, 308. Fixing device, 309. Acceleration suppression device, 310. Slide fixing part, 311. Slide movable part, 312. Screw groove, 313. Through hole, 314. Frame, 315. Connecting plate, 316. Shackle member, 317. Second arm body, 318. Contact part, 319 Friction member support member, 320 Friction member, 321 Constant load spring device, 322 First arm second connecting member, 323 Suspension member, 324 Screw groove, 325 Groove, 326 Frame, 327 U-shaped member, 328 Hook member, 329 Through hole, 330 Shackle member, 331 Through hole, 332 Groove, 333 First magnet, 334 Second magnet, 335 First L-shaped plate, 336 Second L-shaped plate, 337 Third magnet, 338 Fourth magnet, 339 Support object bottom plate inclination suppression member, 340 Frame fixing member, 341 Side support plate part, 342 Hook part, 343 Fixing part, 344 Support beam part, 345 Handle, 346 Push-pull cable, 347 Third stopper, 348 Groove, 349 Rotating member, 350 first pin, 351 second pin, 352 fourth stopper, 353 fifth stopper, 354 third pin, 355 tension spring, 356 rotating part, 357 suspension member, 358 frame, 359 shackle member, 901 frame, 902 bottom plate, 903 hole.

Claims

1. A trolley and A column member erected on the aforementioned trolley, A support member for an object to be supported is provided on the column member, Equipped with, The object support member comprises a pair of first arms mounted on the column member so as to be able to move up and down, and a pair of second arms, one of which is provided on each of the pair of first arms. Each of the pair of second arms is slidable in the longitudinal direction of the first arm relative to the corresponding first arm of the pair of first arms. The object support member further includes a first arm first connecting member that connects the pair of first arms at a position away from the column member, The overall dimensions of the first arm and the second arm in the longitudinal direction are defined as the overall arm dimensions. As the second arm slides relative to the first arm, the second arm moves between a first position where the overall dimension of the arm is a first dimension and a second position where the overall dimension of the arm is a second dimension that is greater than the first dimension. The object support member includes a first stopper that restricts the second arm from moving relative to the first arm in a direction that makes the overall dimension of the arm smaller than the first dimension, and a second stopper that restricts the second arm from moving relative to the first arm in a direction that makes the overall dimension of the arm larger than the second dimension. The support member for the object to be supported has a fixing device that fixes the second arm and the first stopper in the first position, or fixes the second arm and the second stopper in the second position.

2. A trolley and A column member erected on the aforementioned trolley, A support member for an object to be supported is provided on the column member, Equipped with, The object support member comprises a pair of first arms mounted on the column member so as to be able to move up and down, and a pair of second arms, one of which is provided on each of the pair of first arms. Each of the pair of second arms is slidable in the longitudinal direction of the first arm relative to the corresponding first arm of the pair of first arms. The object support member further includes a first arm first connecting member that connects the pair of first arms at a position away from the column member, The overall dimensions of the first arm and the second arm in the longitudinal direction are defined as the overall arm dimensions. As the second arm slides relative to the first arm, the second arm moves between a first position where the overall dimension of the arm is a first dimension and a second position where the overall dimension of the arm is a second dimension that is greater than the first dimension. The object support member includes a first stopper that restricts the second arm from moving relative to the first arm in a direction that makes the overall dimension of the arm smaller than the first dimension, and a second stopper that restricts the second arm from moving relative to the first arm in a direction that makes the overall dimension of the arm larger than the second dimension. The bogie is equipped with brakes to stop the wheels, The object support member has a third stopper that moves between a movement restriction position, which restricts the movement of the second arm toward the second position by contacting the second arm at the first position, and a restriction release position, which releases contact with the second arm. The third stopper is configured to receive power from the operation of the brake, A lift in which the position of the third stopper becomes the release position when the brake is braking the wheel, and the position of the third stopper becomes the movement restriction position when the wheel is not being braked by the brake.

3. The bogie is equipped with brakes to stop the wheels, The object support member has a third stopper that moves between a movement restriction position, which restricts the movement of the second arm toward the second position by contacting the second arm at the first position, and a restriction release position, which releases contact with the second arm. The third stopper is configured to receive power from the operation of the brake, The lifter according to claim 1, wherein the position of the third stopper becomes the release position when the brake is braking the wheel, and the position of the third stopper becomes the movement restriction position when the wheel is not being braked by the brake.

4. The lifter according to any one of claims 1 to 3, wherein the object support member has a first arm second connecting member that connects the pair of first arms at a position further away from the column member than the first arm first connecting member.

5. The lifter according to any one of claims 1 to 3, wherein the object support member has a second arm connecting member that connects the pair of second arms at a position further away from the column member than the first arm first connecting member.

6. The lifter according to any one of claims 1 to 5, wherein the object support member has an acceleration suppression device that suppresses an increase in the movement speed of the second arm relative to the first arm.

7. An additional balance weight support member is detachably provided on the aforementioned trolley, The additional balance weight provided on the additional balance weight support member, Equipped with, The lifter according to any one of claims 1 to 6, wherein the additional balance weight is positioned in the front-rear direction of the trolley on the opposite side of the column member from the second arm.

8. The aforementioned support member for the object to be supported has a frame fixing member that is fixed to the frame of the object to be supported, The lifter according to any one of claims 1 to 7, wherein the second arm supports the frame fixing member inside the frame.

9. The lifter according to any one of claims 1 to 8, wherein the object support member is supported by the pair of second arms and has a rotating part that rotates about an axis extending in the vertical direction, and a suspension member that is supported by the rotating part and from which the object to be supported is suspended.

10. The object support member has an object bottom plate tilt suppression member provided on the second arm, The lifter according to any one of claims 1 to 9, wherein the support object bottom plate inclination suppressing member pushes the bottom plate downward so as to suppress the bottom plate of the support object frame from inclining with respect to the horizontal plane.

Images