Device with moving tool

Abstract

To provide a device with a movement tool, which is structured to reduce a damage of even a caster of a strength likely to be damaged when it collides with a step with a standard upper limit strength.SOLUTION: This device comprises: a base 10 of the device; and a caster 20 having a wheel 21 rolling on a floor surface 30 during movement and a support shaft 22 fixed to the base 10 at a position in front of the rotational center line L1 of the wheel 21 during the movement and higher than the upper end 21a of the wheel 21 to support the wheel 21. The base 10 is provided with a frame 12 provided at a position behind the support shaft 22 in a movement direction and higher than the upper end 21a of the wheel 21 to receive contact of the caster 20 when the support shaft 22 collides with a step 31 to be bent rearward.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a device with a moving tool. [Background technology]

[0002] Even heavy, stationary equipment may need to be moved during installation, or even after installation, for example, once every few years, and may be equipped with moving devices such as casters.

[0003] When moving the device using the moving tool provided with the device, there is a risk that the moving tool may hit a step in the floor. If the impact causes significant damage to the support shaft of the moving tool, it may become difficult to move the device further. The risk of the moving tool hitting a step in the floor also applies to devices with moving tools, such as carts, that transport objects to be transported.

[0004] One way to avoid this risk is to provide a more robust moving device, but this would increase costs. It is not advisable to implement costly measures for a device that is rarely moved.

[0005] Patent Document 1 proposes a structure in which a separate item, different from the moving tool, is placed against the step so that the step does not directly hit the caster. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-38826 Summary of the Invention [Problem to be solved by the invention]

[0007] To provide a device with a moving tool having a structure that reduces damage to the moving tool even if the moving tool has a strength that may cause damage when hitting a step with the maximum strength specified. [Means for solving the problem]

[0008] First aspect The invention relates to: A base and a moving tool having wheels that roll on a floor surface during movement, and a support part that is fixed to the base at a position higher than the upper ends of the wheels and supports the wheels, This is a device with a moving tool, characterized in that the base has a contactable part that is located behind the support part in the direction of movement and higher than the upper end of the wheel, and that comes into contact with the moving tool when the support part bends backward.

[0009] Second aspect The invention relates to: The contacted portion is provided rearward of the rotation center line of the wheel in the direction of movement during movement. First aspect 1 is a device with a moving tool as described above.

[0010] Third aspect The invention relates to: The contacted part is located in a direction parallel to the rotation center line of the wheel and the moving direction of the wheel when the wheel is moving. rear The moving direction of the moving object is located rearward of the center between the moving object and the end. Second aspect 1 is a device with a moving tool as described above.

[0011] Fourth Aspect The invention relates to: The contacted portion is provided forward of the rear end of the wheel in the direction of movement during movement. First aspect from Third aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0012] Fifth Aspect The invention relates to: The support part is fixed to the base part at a position higher than the contacted part. First aspect from Fourth Aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0013] Sixth Aspect The invention relates to: The support part has a fixed center point in the direction of movement to the base part, the center point being located forward of the center in the direction of movement between the rotation center line of the wheel and the front end of the wheel in the direction of movement during movement. First aspect from Fifth Aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0014] Seventh Aspect The invention relates to: before The support portion has the center point behind the front end of the wheel in the moving direction during movement. Sixth Aspect 1 is a device with a moving tool as described above.

[0015] Eighth Aspect The invention relates to: The contacted portion is provided at a position where it is contacted by the moving tool when it is within the range of elastic deformation of the support portion. First aspect from Seventh Aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0016] Ninth Aspect The invention relates to: The contacted portion is The support portion is fixed to the base portion so that an angle formed between a first line connecting the center point of deformation in the movement direction when the support portion bends backward and the contacted portion and a second line connecting the center point and a portion of the wheel that comes into contact with the contacted portion is 10 degrees or less. Characterized by First aspect from Seventh Aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0017] Tenth Aspect The invention relates to: the moving tool has a visor between the wheel and the contacted part, The contacted portion is When the support portion is bent backward, the eaves are sandwiched between the contacted portion and the wheel, and the support portion is bent backward from a first angle between a first line connecting the center point of deformation in the movement direction when the support portion is bent backward and the contacted portion, which is a fixed portion of the support portion to the base portion in the state before deformation of the support portion, and a second line connecting the center point and a portion of the wheel that contacts the contacted portion with the eaves sandwiched between the contacted portion and the wheel. covered The contact portion is provided at a position where a differential angle obtained by subtracting a second angle between the first line and the second line when the contact portion is in contact with both the wheel and the contact portion is 10 degrees or less. Characterized by First aspect from Seventh Aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0018] Eleventh Aspect The invention relates to: The moving device is arranged in plurality with a gap therebetween, and the contacted part is provided at a position corresponding to the moving device arranged forward in the moving direction. First aspect from Tenth Aspect Of Any one of the following 1 is a device with a moving tool as described above.

[0019] Twelfth Aspect The invention relates to: At least one of the moving tools is a front-placed moving tool that is positioned forward in the moving directions in two directions that intersect with each other, and the contacted part is provided at a position corresponding to the movement of the front-placed moving tool in both of the two directions. Eleventh Aspect 1 is a device with a moving tool as described above. [Effects of the Invention]

[0020] First aspect According to the device with the moving tool, damage to the moving tool when the moving tool hits a step hard is reduced compared to when no contacted part is provided.

[0021] Second aspect - Fourth Aspect According to the device with the moving tool of the above, the contacted part functions more effectively than when the requirements of each claim are not met.

[0022] Fifth Aspect - Seventh Aspect According to the device with the moving tool of the above, the contacted part can be provided at a higher position compared to a case where the requirements of each claim are not met.

[0023] Eighth Aspect - Tenth Aspect According to the device with the moving tool, damage to the moving tool can be avoided compared to when the contacted part is provided in a position where it will be contacted by the wheel after the support part has been plastically deformed.

[0024] Eleventh Aspect According to the device with the moving tool, the contacted part acts more effectively than when the contacted part is provided at a position corresponding to the moving tool arranged rearward in the movement direction.

[0025] Twelfth Aspect According to the device with the moving tool, the contacted part can be effectively moved in multiple directions. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a diagram illustrating a device with a moving tool according to a first embodiment of the present invention. [Figure 2] 2 is an enlarged schematic view of a portion of circle R1 shown in FIG. 1(A) and a portion of circle R2 shown in FIG. 1(B). [Figure 3] FIG. 10 is a schematic diagram showing a state in which a caster hits a step on the floor surface. [Figure 4] FIG. 10 is a schematic diagram illustrating the amount of lift of the wheel when the support shaft is deformed when the support shaft and the wheel are misaligned in the traveling direction. [Figure 5] 3 is an enlarged schematic view of a portion of a device with a moving tool according to a second embodiment of the present invention, the portion corresponding to FIG. 2. FIG. [Figure 6]6 is a schematic diagram showing a state in which the caster of the device with a moving device according to the second embodiment shown in FIG. 5 hits a step on the floor surface. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, an embodiment of the present invention will be described.

[0028] FIG. 1 is a diagram illustrating a device with a moving tool according to a first embodiment of the present invention.

[0029] Figure 1( A ) shows an example of a so-called multifunction machine that has multiple functions such as printing and scanning. Note that although the explanation here focuses on the multifunction machine 1, the following explanation is not limited to the multifunction machine 1 and applies to any device with casters in general. Here, "device" refers to machines, tools, furniture, boxes, etc., including machines such as multifunction machines, carts, casters, desks, etc. Which can be cited as an example.

[0030] This multifunction device 1 is too heavy to lift and move by hand, so casters 1b for movement are provided near the four corners of the bottom surface 1a. These casters 1b are of a type that changes direction depending on the direction of movement so that the multifunction device 1 can be moved in any direction. The structure that allows this change in direction will be described later with reference to Figure 2.

[0031] Furthermore, this multifunction device 1 is designed to be lifted and carried using a forklift or hand lift (not shown), and is set at a height that allows enough space between the bottom surface 1a and the floor surface 3 to insert the forks of the forklift or hand lift.

[0032] In the case of this multifunction machine 1, the housing or frame forming the bottom surface 1a is base The caster 1b corresponds to an example of the moving tool of the present invention.

[0033] FIG. 1(B) shows an example of a cart and an example of a floor surface.

[0034] The dolly 2 is a device for placing an object to be transported on the main body 2a and pushing the handle 2b to transport the object, and casters 2d are provided near the four corners of the bottom surface 2c of the main body 2a. In the case of this dolly 2, the two casters 2d on the side away from the handle 2b, i.e., on the front side in the direction of travel, are casters that can change direction, while the two casters 2d on the handle 2b side, i.e., on the rear side in the direction of travel, are casters with fixed direction. In the case of this dolly 2, the main body 2a corresponds to an example of a base as referred to in the present invention. Furthermore, in the case of this dolly 2, the casters 2d also correspond to an example of a moving tool as referred to in the present invention.

[0035] In the case of the cart 2, even if there is a step 3a on the floor 3, the height of the bottom surface 2c of the cart 2 is required to be such that the step 3a on the floor 3 does not come into contact with the bottom surface 2c of the cart 2. However, even if the step 3a is not high enough to come into contact with the bottom surface 2c of the cart 2, there is a risk that the caster 2d may hit the step 3a during movement. When this happens, a lateral force is applied to the caster 2d, which may cause deformation or even damage to the caster.

[0036] This situation is not limited to the cart 2, but also applies to the multifunction device 1 shown in Fig. 1(A). Note that although the multifunction device 1 and cart 2 have been taken up for explanation here, the explanation here is not limited to the multifunction device 1 and cart 2, but applies to any device with casters in general.

[0037] Figure 2 is an enlarged schematic diagram of the circle R1 shown in Figure 1(A) and the circle R2 shown in Figure 1(B). Caster 1b shown in circle R1 is drawn differently from caster 2d shown in circle R2, but this is because caster 1b is drawn facing in a different direction than caster 2d. Both casters have the same structure and can change direction. Therefore, the following explanation will be given without distinguishing between them, with the casters and bottom surfaces given new reference numerals.

[0038] In this Figure 2 base Casters 20 are shown attached to the bottom surface 11 of 10.

[0039] The caster 20 has a wheel 21 that rolls on the floor surface 30 during movement and a support shaft 22 that supports the wheel 21. The wheel 21 has a rotation shaft 211 fixed to the support shaft 22 and is rotatable around the rotation shaft 211, i.e., around a rotation center line L1 extending perpendicular to the plane of FIG. 2 . The support shaft 22 is attached to the bottom surface 11 of the base 10 via a mounting bracket 221 at a position higher than the upper end 21 a of the wheel 21 so as to be rotatable around a rotation center line L2 extending vertically. In this embodiment, the rotation center line L2 of the support shaft 22 is offset from the rotation center line L1 of the wheel 21 without intersecting with it. Therefore, when the caster 20 receives a force from the floor surface 30 during movement, the wheel 21 rotates in a direction that is rearward of the support shaft 22 in the direction of travel indicated by arrow X, as shown in FIG. 2 .

[0040] The base 10 is also provided with a frame 12 that protrudes downward from the bottom surface 11. The frame 12 is provided behind the support shaft 22 in the direction of movement, behind the rotation center line L1 of the wheel 21 during movement, and higher than the upper end 21a of the wheel 21, spanning the entire width of the wheel 21 (the dimension perpendicular to the plane of FIG. 2). The frame 12 serves to receive the contact of the caster 20 when the support shaft 22 bends backward. The reason why the frame 12 is provided at a position higher than the upper end of the wheel 21 is to avoid unevenness in the floor surface 30.

[0041] Also, forklift centre When transporting using a forklift, make sure to secure a space for the forklift to enter the frame. 12 The height h to the base is preferably 60 mm or more.

[0042] As described above, the caster 20 corresponds to an example of the transportation device referred to in the present invention. However, the transportation device referred to in the present invention does not necessarily need to change direction depending on the direction of travel, as does the caster 20 shown here. The wheel 21 and the support shaft 22 constituting the caster 20 correspond to an example of the wheel and the support part, respectively, referred to in the present invention. Furthermore, the contacted part 121 of the frame 12 that comes into contact with the wheel 21 corresponds to an example of the contacted part referred to in the present invention. In the case of a caster that does not change direction, the fixed position of the wheel to the support part or base is generally aligned vertically with the center of rotation of the wheel.

[0043] FIG. 3 is a schematic diagram showing the state in which the caster hits a step on the floor surface.

[0044] Since the support shaft 22 of the caster 20 is located further forward than the wheel 21 in the traveling direction indicated by the arrow X, the support shaft 22 abuts against the step 31 on the floor surface 30 .

[0045] In the case of a heavy device such as the multifunction peripheral 1 shown in FIG. 1(A), or when a heavy object to be transported is placed on the cart 2 shown in FIG. 1(B), when the support shaft 22 hits the step 31 hard, the support shaft 22 is pushed backward and deformed, causing the wheel 21 to hit the frame 12. Note that in the example shown here, the wheel 21 hits the frame 12, but it is not necessarily the wheel 21 that hits the frame 12. As shown in a second embodiment described later, there are also casters in which a curved eaves is provided above the wheel 21 to follow the curve of the wheel 21, and in that case, it may be the eaves that hits the frame 12. However, here, the explanation will be continued assuming that the wheel 21 hits the frame 12.

[0046] In this embodiment, the dimensions, arrangement position, and the like of the frame 12 and the like are set so that the wheel 21 hits the frame 12 while the support shaft 22 is within the range of elastic deformation. Specifically, the contacted portion 121 of the frame 12 is provided behind the center in the movement direction between the rotation center line L1 of the wheel 21 and the rear end 21b of the wheel 21 in the movement direction (the position indicated by the straight line L3) during movement, and in front of the rear end 21b of the wheel 21 in the movement direction during movement. In other words, the contacted portion 121 of the frame 12 is located within the last 1 / 4 region when the wheel 21 is divided into 4 in the traveling direction. As a result, a position of approximately the rear 1 / 4 of the wheel 21 hits the contacted portion 121.

[0047] The support shaft 22 is fixed to the bottom surface 11 of the base 10 via a mounting bracket 221 at a position higher than the contacted portion 121 of the frame 12 that comes into contact with the wheel 21. The support shaft 22 is oriented in such a way that, in the movement direction indicated by the arrow X, the rotation center line L2 of the support shaft 22 is located forward of the center in the movement direction between the rotation center line L1 of the wheel 21 and the front end 21c of the wheel 21 in the movement direction (the position indicated by the straight line L4). base 10. Furthermore, the rotation center line L2 of this support shaft 22 is located behind the front end 21c of the wheel 21 in the direction of movement during movement. In other words, the rotation center line L2 of the support shaft 22 is within the first quarter of the wheel 21 when the wheel 21 is divided into four in the direction of travel. This allows the support shaft to move upward by a large amount when deformed, and can even strike against the frame 12 that is located at a high position.

[0048] Here, we will explain why, in this embodiment, when the wheel 21 is divided into four parts in the direction of travel, the rotation center line L2 of the support shaft is located within the first 1 / 4 area, and the contacted part 121 of the frame 12 is located within the last 1 / 4 area.

[0049] FIG. 4 is a schematic diagram that considers the amount of lift of the wheel when the support shaft is deformed when the support shaft and the wheel are misaligned in the traveling direction.

[0050] 4(A) shows a case where the rotation center line L1 of the wheel 21 is at a position where it intersects with the rotation center line L2 of the support shaft 22. Here, when the support shaft 22 deforms, it deforms starting from a center point 222 (see both FIGS. 2 and 3) which is the fixed portion at the upper end of the support shaft 22 and intersects with the rotation center line L2.

[0051] If the distance between the center point 222 and the rotation center point L1 of the wheel 21 is x and the angle of deformation is θ, the amount of lift d of the wheel 21 is given by: d=x·(1-cosθ) Here, as an example, if θ=10°, the lift amount d of the wheel 21 is expressed as follows: d=x 0.015 (1) That is, when the rotation center line L1 is at a position where it intersects with the rotation center line L2 of the support shaft 22, the rise is only a small amount, 0.015 times the distance x.

[0052] 4(B) shows a case where the rotation center line L1 of the wheel 21 is shifted in the direction of travel with respect to the rotation center line L2 of the support shaft 22, as in the embodiment shown in FIG. 2. Here, the angle from the vertical measured at the center point 222 is assumed to be α. Now, assume that the caster 20, in which the wheel 21 and support shaft 22 are shifted in this way, is deformed by an angle θ.

[0053] At this time, the lift amount d of the wheel 21 is d=x·(cosα−cos(α+θ)) For example, if α=30° and θ=10°, the lift amount d of the wheel 21 is expressed as follows: d=x·(0.866-0.766)=x·0.1··(2) This equation (2) expresses a larger amount of lift d than equation (1). That is, by displacing the rotation center line L1 of the wheel 21 and the rotation center line L2 of the support shaft 22 in positions that are offset in the direction of travel, the amount of lift d of the wheel 21 increases even with the same amount of deformation at the angle θ.

[0054] The embodiment shown in Figs. 2 and 3 utilizes this fact and is configured to bring the wheel 21 into contact with the contacted portion 121 while the support shaft 22 is in a state of slight deformation within the range of elastic deformation.

[0055] Returning to Figure 2, we continue the explanation.

[0056] 2 is a line connecting the center point 222 of deformation of the support shaft 22 and the contacted part 121 of the frame 12. Also, a line L6 is a line connecting the center point 222 of deformation and the contact point 21e of the wheel 21 with the contacted part 121 when the support shaft 22 is deformed. The angle θ formed by these two lines L5 and L6 is, as exemplified in the explanation of FIG. 4, θ≦10° If θ≦10°, the wheel 21 can be brought into contact with the contacted portion 121 while the deformation of the support shaft 22 is within the range of elastic deformation.

[0057] If we only consider increasing the amount of lift d of the wheel 21 during deformation (see Figure 4), it is desirable to increase the angle α shown in Figure 4(B). The larger the amount of lift d when the wheel 21 is deformed by the same amount of deformation θ, the higher the frame 12 can be positioned, increasing the height h from the floor 30, i.e., the larger the space available for the forklift tines to fit into.

[0058] However, if the angle α is increased, the wheel 21 will have to draw a large arc when changing its direction of travel. In other words, the larger the angle α, the larger the area occupied by the wheel 21 when changing its direction of travel, which is undesirable. Therefore, in this embodiment, when the wheel 21 is divided into four parts in the direction of travel, the rotation center line L2 of the support shaft 22 is located within the first quarter of the area, and the contacted portion 121 of the frame 12 is located within the last quarter.

[0059] If the frame 12 and the support shaft 22 have a structure that satisfies the above conditions, the support shaft 22 can be brought into contact with the frame 12 within the range of elastic deformation, as shown in Figure 3. If the frame 12 is struck against the frame 12 while it is still within the range of elastic deformation, the support shaft 22 will return to its original shape when the caster 20 leaves the step 31 on the floor surface 30, and transportation can continue as is.

[0060] 1(A) and 1(B), a plurality of casters 1b, 2d are arranged at intervals on the multifunction printer 1 or the cart 2. However, it is the caster 20 arranged forward in the direction of movement indicated by the arrow X that may collide with the step 31 shown in Fig. 3. Accordingly, the frame 12 shown in Figs. 2 and 3 is provided at a position corresponding to the caster 20 arranged forward in the direction of movement.

[0061] 1(A), all of the casters 20 are configured to change direction depending on the direction of travel, allowing the multifunction device 1 to move forward and sideways. Therefore, the frame 12 is provided in positions corresponding to all of the casters 20 that may be positioned forward in the direction of travel, and corresponding to each of the multiple directions of travel in which the caster 20 is forward in the direction of travel.

[0062] Next, a second embodiment of the present invention will be described. In the second embodiment described below, the same elements as those in the first embodiment described above will be denoted by the same reference numerals, and only the differences will be described.

[0063] FIG. 5 is an enlarged schematic view of a portion of a device with a moving tool according to a second embodiment of the present invention, which corresponds to FIG.

[0064] FIG. 6 is a schematic diagram showing a state in which the caster of the device with a moving device according to the second embodiment shown in FIG. 5 hits a step on the floor surface.

[0065] In the first embodiment described above, when comparing the wheel 21 and the support shaft 22, the support shaft 22 protrudes toward the leading edge in the traveling direction. Therefore, as shown in FIG. 3, the support shaft 22 abuts against the step 31. In contrast, in the second embodiment, the front end 21c of the wheel 21 in the traveling direction is located closer to the leading edge in the traveling direction than the support shaft 22. Therefore, as shown in FIG. 6, the wheel 21 abuts against the step 31. Typically, the support shaft 22 is made of metal, and the outer surface of the wheel 21 is often made of rubber. Therefore, it is preferable for the wheel 21 to abut against the step 31 from the viewpoints of preventing scratches, mitigating impacts at the time of abutment, and preventing scratches. However, even in this example, when the wheel 21 is divided into four parts in the traveling direction, it is preferable that the rotation center line L2 of the support shaft be located within the first one-quarter region.

[0066] 5 and 6, the caster 20 is provided with a visor 23 arranged to surround the upper side of the wheel 21. Therefore, as shown in FIG. 6, when the support shaft 22 hits a step 31 and is deformed, the visor 23 comes into contact with the contacted portion 121 of the frame 12. Then, the wheel 21 presses the visor 23 against the contacted portion 121.

[0067] 2, the straight line L5 is a straight line connecting the center point 222 of the deformation and the contact point 121 of the frame 12. However, unlike the case of FIG. 2, the straight line L6 is a straight line connecting the center point 222 of the deformation and the contact point 121 of the frame 12 when the wheel 21 is contacted with the eaves 23 when the wheel 21 is deformed as shown in FIG. contact 121c is a straight line connecting the pressing point 221e to the pressing point 221c where the pressing point 221c is pressed against the portion 121.

[0068] Here, the angle formed by the two straight lines L5 and L6 before deformation shown in Fig. 5 is θ1, and the angle formed by the two straight lines L5 and L6 after deformation shown in Fig. 6 is θ2. In this way, when the canopy 23 is provided, which is sandwiched between the contacted part 121 and the wheel 21 and pressed against both of them during deformation, the canopy 2 3 The difference angle Δθ=θ1-θ2 obtained by subtracting the thickness equivalent of Δθ≦10° It is preferable that:

[0069] Although the multifunction device 1 and the dolly 2 have been described as examples here, the present invention is not limited to these multifunction device 1 and dolly 2, and is applicable to any device with casters in general. [Explanation of symbols]

[0070] 1 Multifunction device 1a Bottom 1b Caster 2 carts 2a books body 2b Handle 2c Bottom 2d caster 3 Floor 3a step 10 base 11 Bottom 12 frames 121 Contacted part 20 Caster 21 wheels 21a Top of the wheel 21b Rear end of wheel movement direction 21c Front end of wheel movement direction 22 Spindle 221 Mounting bracket 222 Center point 23 Eaves 30 Floor 31 Steps

Claims

1. A base and a moving tool having wheels that roll on a floor surface during movement, and a support part that is fixed to the base at a position higher than the upper ends of the wheels and supports the wheels, the base portion includes a contacted portion that is provided at a position rearward of the support portion in the movement direction and higher than the upper end of the wheel, and that is contacted by the moving tool when the support portion bends rearward; A device with a moving tool, characterized in that the support part has a center point of the movement direction fixed to the base between the center of the movement direction between the center line of rotation of the wheel and the front end of the wheel in the movement direction during movement, and the front end of the wheel in the movement direction during movement.

2. A base and a moving tool having wheels that roll on a floor surface during movement, and a support part that is fixed to the base at a position higher than the upper ends of the wheels and supports the wheels, the base portion includes a contacted portion that is provided at a position rearward of the support portion in the movement direction and higher than the upper end of the wheel, and that is contacted by the moving tool when the support portion bends rearward; The contacted portion is A device with a moving tool, characterized in that the fixing portion of the support portion to the base portion of the support portion is located at a position where the angle between a first line connecting the center point of deformation in the movement direction when the support portion bends backward and the contacted portion and a second line connecting the center point and the portion of the wheel that contacts the contacted portion is 10 degrees or less.

3. A base and a moving tool having wheels that roll on a floor surface during movement, and a support part that is fixed to the base at a position higher than the upper ends of the wheels and supports the wheels, the base portion includes a contacted portion that is provided at a position rearward of the support portion in the movement direction and higher than the upper end of the wheel, and that is contacted by the moving tool when the support portion bends rearward; the moving tool has a visor between the wheel and the contacted part, The contacted portion is a first line connecting the center point of deformation in the movement direction when the support part is bent backward and the contacted part, which is a fixed part of the support part to the base part before deformation of the support part, and a second line connecting the center point and the part of the wheel that contacts the contacted part across the eaves, and a second angle between the first line and the second line when the support part is bent backward and the eaves are sandwiched between the contacted part and the wheel and in contact with both the contacted part and the wheel, the differential angle being 10 degrees or less.

4. The device with a moving tool according to claim 2 or 3, characterized in that the support part has a center point in the moving direction of its fixation to the base part, further forward in the moving direction than the center in the moving direction between the center line of rotation of the wheel and the front end of the wheel in the moving direction during movement.

5. 5. The device with a moving implement according to claim 4, wherein the support portion has the center point rearward of the front end of the wheel in the direction of movement during movement.

6. 6. A device with a moving tool according to claim 1, 4, or 5, characterized in that the contacted part is provided at a position that receives contact with the moving tool when it is within the range of elastic deformation of the support part.

7. 7. The device with a moving implement according to claim 1, wherein the contacted portion is provided rearward in the direction of movement from a center line of rotation of the wheel during movement.

8. The device with a moving implement according to claim 7, characterized in that the contacted portion is located rearward in the direction of movement from the center of the direction of movement between the center line of rotation of the wheel and the rear end of the wheel in the direction of movement during movement.

9. 9. The device with a moving implement according to claim 1, wherein the contacted portion is provided forward of a rear end of the wheel in a moving direction during movement.

10. 10. The device with a moving tool according to claim 1, wherein the support part is fixed to the base part at a position higher than the contacted part.

11. A device with a moving tool as described in any one of claims 1 to 10, characterized in that a plurality of the moving tools are arranged with spaces between them, and the contacted part is provided at a position corresponding to the moving tool arranged forward in the movement direction.

12. The device with moving tools described in claim 11, characterized in that at least one of the moving tools is a forward-positioned moving tool that is located forward in the movement direction for movement in two directions that intersect with each other, and the contactable part is provided at a position corresponding to movement of the forward-positioned moving tool in both of the two directions.

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