Heavy object experiencing device
The weight object feeling device addresses the lack of instability simulation in conventional devices by using a displaceable content support within the box body, positioning the center of gravity above the handles, thereby recreating the sensation of instability during lifting.
Patent Information
- Application Number
- JP2023197680
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-11-21
- Publication Date
- 2025-06-02
AI Technical Summary
Conventional weight object feeling devices allow users to experience the risk of judging a heavy object's weight visually but fail to simulate the sense of instability when lifting a box body.
A weight object feeling device with a pair of handles, a box body containing contents, and a support that allows the contents to be relatively displaceable within the box body, positioning the center of gravity above the handles to induce a sense of instability during lifting.
The device effectively recreates the sensation of instability when lifting a heavy object by allowing the contents to shift within the box body, enhancing user awareness of the object's weight distribution.
Smart Images
Figure 2025083969000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a weight object feeling device, and particularly to a weight object feeling device capable of experiencing the sense of instability when lifting a box body.
Background Art
[0002] For example, Non-Patent Document 1 describes a weight object feeling device that allows a person to experience the difference between the appearance and the actual weight of the contents. In this weight object feeling device, weights of different sizes (volumes) are stored in three box bodies. Therefore, a person who visually observes these box bodies will presume that the box body containing the smallest weight is relatively light. On the other hand, actually, the weights of the weights stored in each box body are the same. For this reason, after lifting the box body containing a relatively large weight and then lifting the box body containing a small weight, it is possible to make the person experience that the box body judged to be light visually is much heavier than expected. Thus, for example, when judging the weight of a heavy object visually and lifting it forcefully, it is possible to experience the risk of hurting the body.
Prior Art Documents
Patent Documents
[0003]
Non-Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, in the above-described conventional technology, although the risk of judging the weight of a heavy object visually can be experienced, there is a problem that the sense of instability when lifting the box body cannot be experienced.
[0005] The present invention has been made to solve the above-described problems, and an object thereof is to provide a heavy object feeling device capable of experiencing a sense of instability when lifting a box body.
Means for Solving the Problems
[0006] To achieve this object, the heavy object feeling device of the present invention includes a pair of handles for a user to grip, a box body provided on both side surfaces with the pair of handles and having contents stored therein, and a support attached to the box body and supporting the contents so as to be relatively displaceable with respect to the box body, and the center of gravity of the contents is located above the pair of handles.
Effects of the Invention
[0007] According to the heavy object feeling device described in claim 1, since the support attached to the box body supports the contents so as to be relatively displaceable with respect to the box body, when the user grips the pair of handles and lifts the box body, the contents can be displaced inside the box body. Since the center of gravity of the contents is located above the pair of handles, the center of gravity of the contents can be moved above the gripping position of the handles by the user. Due to this movement of the center of gravity of the contents, there is an effect that a sense of instability when lifting the box body can be experienced.
[0008] According to the heavy object feeling device described in claim 2, in addition to the effects exhibited by the heavy object feeling device described in claim 1, the following effects are exhibited. The support guides the displacement of the contents along one direction while restricting the displacement of the contents in a direction different from the one direction. Therefore, when the box body is lifted, the center of gravity of the contents is likely to move along one direction, while it is difficult to move in a direction different from that. In this way, by providing a difference in the direction in which the center of gravity of the contents is likely to move, there is an effect that different senses of instability can be experienced depending on the way of holding the box body.
[0009] According to the weight object sensing device described in claim 3, in addition to the effects achieved by the weight object sensing device described in claim 2, since the displacement direction of the content along one direction intersects with the virtual line connecting the pair of handles in the top view of the box body, the center of gravity of the content can be moved forward or backward relative to the gripping position of the handles by the person experiencing the sensation. Therefore, there is an effect that the instability when lifting the box body can be increased.
[0010] According to the weight object sensing device described in claim 4, in addition to the effects achieved by the weight object sensing device described in claim 2, since the support is a rod-shaped slide bar from which the content is suspended slidably, the content can be slid in one direction with a relatively simple structure. Therefore, there is an effect that the manufacturing cost of the weight object sensing device can be reduced.
[0011] According to the weight object sensing device described in claim 5, in addition to the effects achieved by the weight object sensing device described in claim 4, since the mounting position of the slide bar with respect to the box body can be changed, the slide direction of the content along the slide bar can be changed. Therefore, there is an effect that the center of gravity movement of the content in various directions can be experienced.
[0012] According to the weight object sensing device described in claim 6, in addition to the effects achieved by the weight object sensing device described in claim 4, since the content is suspended from the slide bar and includes an annular ring having an inner diameter larger than the diameter of the slide bar, the ring can be rotated around the slide bar or swung in the longitudinal direction of the slide bar. Due to the rotation and swinging of these rings, while sliding the content along the slide bar, the content can be swung, so there is an effect that the instability when lifting the box body can be increased.
[0013] According to the weight object sensing device described in claim 7, in addition to the effects achieved by the weight object sensing device described in claim 6, the following effects are achieved. The slide bar extends in one direction (the slide direction of the content), and includes a hanging portion from which the ring is suspended, and a connecting portion that extends upward from an end portion of the hanging portion in one direction and is connected to the upper surface inside the box body. Since the sliding displacement of the ring with respect to the hanging portion is restricted by the contact between the ring and the connecting portion, at the time of such contact, due to the inertial force of the sliding displacement of the content along the hanging portion, the content swings upward (toward the front side in the slide direction) with such a contact portion (connecting portion) as a fulcrum. After this upward swing, since the content repeats the swing with respect to the hanging portion due to its own weight, there is an effect that the instability when the box body is lifted can be increased.
[0014] According to the weight object sensing device described in claim 8, in addition to the effects achieved by the weight object sensing device described in claim 7, the following effects are achieved. The connecting portions are provided in a pair on both end sides of the hanging portion in one direction, and the hanging portion is arranged at a position eccentric from the center of the box body in one direction. Thereby, when the ring contacts one of the pair of connecting portions, compared with the case where the ring contacts the other connecting portion, the content can be swung at a position relatively far (or close) from the center of the box body. Therefore, there is an effect that a different sense of instability can be felt when the ring contacts one connecting portion and when the ring contacts the other connecting portion.
[0015] According to the weight object sensing device described in claim 9, in addition to the effects achieved by the weight object sensing device described in claim 1, since it includes a shielding body that makes the inside of the box body invisible from the outside, the internal structure of the box body (for example, how the content is stored) can be hidden by the shielding body. Thereby, it can be made difficult for the person experiencing the sensation to imagine how the box body behaves when it is lifted, so there is an effect that the sense of instability when the box body is lifted can be increased.
[0016] According to the weight object sensing device described in claim 10, in addition to the effects achieved by the weight object sensing device described in claim 9, an opening that allows displacement of the contents to the outside of the box body is formed on the side surface of the box body, so that a large displacement amount of the contents can be ensured. Therefore, there is an effect that the instability when lifting the box body can be increased. Further, since the opening formed on the side surface of the box body is covered by a shielding body having flexibility, even if the contents displaced to the outside of the box body through the opening come into contact with the shielding body, the contact sound generated at the time of contact can be reduced. Therefore, it is possible to make it difficult for the body sensor to imagine the internal structure of the box body, and there is an effect that the sense of instability when lifting the box body can be increased.
[0017] According to the weight object sensing device described in claim 11, in addition to the effects achieved by the weight object sensing device described in claim 1, the support is a box-shaped case fixed to the box body above the pair of handles, and the contents having a circular cross section are stored in the case. Therefore, when the box body is lifted, the center of gravity can be moved by the rotation of the contents themselves. Therefore, for example, it is not necessary to separately provide a rolling body for sliding the contents inside the case, and there is an effect that the manufacturing cost of the weight object sensing device can be reduced.
[0018] According to the weight object sensing device described in claim 12, in addition to the effects achieved by the weight object sensing device described in claim 1, the support is a box-shaped case fixed to the box body above the pair of handles, and the case is provided with rollers that roll on the inner bottom surface thereof and support the contents slidably. Therefore, when the box body is lifted, the center of gravity of the contents can be moved by the rolling of the rollers. Therefore, there is an effect that the center of gravity movement of the contents can be made smooth.
[0019] According to the weight object sensing device described in claim 13, in addition to the effects achieved by the weight object sensing device described in claim 1, the support is a box-shaped case fixed to the box body above the pair of handles, and the content is a liquid enclosed in the case. Therefore, when the box body is lifted, the liquid can cause the liquid level to fluctuate while moving its center of gravity. That is, there is an effect that the specific behavior when lifting a heavy object with a liquid inside can be experienced.
Brief Description of the Drawings
[0020]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Modes for Carrying Out the Invention
[0021] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1(a) is a perspective view of a weight object feeling device 100 in the first embodiment, and FIG. 1(b) is a perspective view of the weight object feeling device 100 with the cover 180 removed. In FIG. 1, the arrows F-B, U-D, and L-R in the figure indicate the front-rear direction, the up-down direction (vertical direction), and the left-right direction of the weight object feeling device 100, respectively (the same applies hereinafter in FIG. 2 and subsequent figures).
[0022] As shown in FIG. 1, the weight object feeling device 100 is a device for allowing a user to experience the behavior when carrying a heavy object with a moving content. Although details will be described later, when the user (the person experiencing the feeling) lifts the box body 110, the user can experience the same behavior (a feeling of instability) as when lifting a heavy object with a moving content due to the movement of the center of gravity of the weight 160. Also, when performing such an experience, the rectangular parallelepiped box body 110 is covered with an opaque cover 180 (see FIG. 1(a)).
[0023] The cover 180 is formed in a rectangular parallelepiped shape having an opening on one surface (the lower surface) by sewing five sheets, and through holes and cutouts for passing the lower handle 120 and the upper handle 170 are formed on the upper surface and side surfaces of the cover 180. By covering the box body 110 with this cover 180, the upper surface and the four side surfaces of the box body 110 are covered, so that the user cannot visually recognize the internal structure (how the weight 160 operates). Therefore, the user can feel the feeling of instability more strongly when lifting the weight object feeling device 100.
[0024] The detailed configuration of this weight object feeling device 100 will be described with reference to FIGS. 1 and 2. FIG. 2(a) is a side view of the weight object feeling device 100 viewed from the direction of arrow IIa in FIG. 1(b), FIG. 2(b) is a rear view of the weight object feeling device 100 viewed from the direction of arrow IIb in FIG. 1(b), and FIG. 2(c) is a partial cross-sectional view of the weight object feeling device 100 taken along line IIc-IIc in FIG. 2(a). In FIGS. 2(a) and 2(b), the cover 180 is omitted from the illustration (the same applies in FIG. 4). Also, FIG. 2(c) is an end view showing only the cross-section of the upper center frame 113d.
[0025] The weight object sensing device 100 includes a box body 110 that constitutes a substantially rectangular parallelepiped framework. The box body 110 includes a lower frame 111 that constitutes a substantially H-shaped framework at its lower part, four side frames 112 that extend upward (in the direction of arrow U) from the four corners of the lower frame 111, and an upper frame 113 that constitutes a substantially rectangular framework at the upper parts of the four side frames 112. Each of these frames is a member made of aluminum formed in a substantially quadrangular prism shape.
[0026] The lower frame 111 includes a pair of lower side frames 111a that are separated from each other by a predetermined distance in the left-right direction (arrow L-R direction), and a lower center frame 111b that is connected to the center in the front-rear direction (arrow F-B direction) of the pair of lower side frames 111a.
[0027] The lower side frame 111a is a frame that extends in the front-rear direction, and the lower center frame 111b is a frame that extends in the left-right direction. A lower handle 120 is attached to the side surface of the lower side frame 111a that faces the outside in the left-right direction.
[0028] The lower handle 120 is a member made of steel in which a cylindrical pipe is bent into a substantially U shape, and includes a pair of connection parts 121 that protrude laterally from the lower side frame 111a, and a handle part 122 that connects the tips of the pair of connection parts 121 in the front-rear direction. The handle part 122 is a part that is gripped by the user's hand when the user lifts the box body 110 (weight object sensing device 100).
[0029] The base end part of the connection part 121 is attached to the outer surface of the lower side frame 111a via a fixture 130, and the details of this fixture 130 will be described later. The tip part of the connection part 121 is curved upward (rising inclined toward the outside in the left-right direction), and the handle part 122 that connects the pair of connection parts 121 is located above the lower side frame 111a.
[0030] The lower handle 120 is provided on each of the pair of left and right lower side frames 111a. Therefore, the box body 110 can be lifted by the user holding the pair of left and right lower handles 120 (handle parts 122) with both hands.
[0031] Both ends of the lower side frame 111a in the front - rear direction are connected to the lower - end sides of the front and rear surfaces of the two side frames 112 arranged in the front - rear direction. Each of the four side frames 112 is a frame extending in the vertical direction (arrow U - D direction), and rubber legs 140 are attached to the lower surfaces of the side frames 112. The box body 110 is grounded to the ground surface via these legs 140.
[0032] An upper frame 113 is connected to the upper part of the side frame 112. The upper frame 113 includes a pair of upper side frames 113a spaced apart by a predetermined distance in the left - right direction, a front frame 113b and a rear frame 113c spaced apart by a predetermined distance in the front - rear direction, and an upper - center frame 113d connecting the rear surface of the front frame 113b and the front surface of the rear frame 113c.
[0033] The upper side frame 113a is a frame extending in the front - rear direction, and both ends of the upper side frame 113a are connected to the upper - end sides of the front and rear surfaces of the two side frames 112 arranged in the front - rear direction.
[0034] The front frame 113b and the rear frame 113c are frames extending in the left - right direction, and both ends of the front frame 113b and the rear frame 113c are connected to the upper - end sides of the inner surfaces (surfaces facing the inner side in the left - right direction) of the two side frames 112 arranged side - by - side in the left - right direction.
[0035] The upper center frame 113d is a frame extending in the front-rear direction, and the centers of the front frame 113b and the rear frame 113c in the left-right direction are connected by the upper center frame 113d. That is, a rectangular space surrounded by the pair of upper side frames 113a, the front frame 113b, and the rear frame 113c is divided into two parts left and right by the upper center frame 113d. Also, in a top view, the upper center frame 113d intersects the lower center frame 111b.
[0036] A slide bar 150 is attached to the lower surface of the upper center frame 113d (the upper surface inside the box body 110). The slide bar 150 is a steel member formed by bending a cylindrical pipe into a substantially U shape, and includes a pair of connecting portions 151 extending downward in parallel from the upper center frame 113d and a hanging portion 152 extending in a direction orthogonal to the pair of connecting portions 151.
[0037] The total length of the slide bar 150 in the front-rear direction (the dimension from the front surface of the front-side connecting portion 151 to the rear surface of the rear-side connecting portion 151) is set to be shorter than the length of the upper center frame 113d and longer than half of the length of the upper center frame 113d. The connecting portion 151 of the slide bar 150 is attached to the lower surface of the upper center frame 113d via a fixture 130.
[0038] A groove 114 (see Fig. 2(c)) for fixing the fixture 130 is formed on the side surface of the upper center frame 113d. The groove 114 is formed on each of the four side surfaces of the upper center frame 113d, and these four grooves 114 extend across both ends in the longitudinal direction of the upper center frame 113d (the direction perpendicular to the paper surface of Fig. 2(c)).
[0039] The groove 114 includes a first groove portion 114a having a constant groove width extending from the side surface of the upper center frame 113d toward the center, and a second groove portion 114b formed closer to the center side of the upper center frame 113d than the first groove portion 114a and having a larger groove width than the first groove portion 114a. The second groove portion 114b has a substantially trapezoidal cross section.
[0040] The fixture 130 includes a flat base member 131 (see Fig. 2(c)) and bolts 132 and nuts 133 for fixing the base member 131 to the upper central frame 113d. The base member 131 is formed in an oval shape. Although not shown, a pair of through-holes are formed in the base member 131 along its longitudinal direction (the direction perpendicular to the plane of Fig. 2(c)).
[0041] Of this pair of through-holes, one through-hole shown in Fig. 2(c) is a hole for inserting the bolt 132, and the other through-hole (not shown) located on the back side in the direction perpendicular to the plane of Fig. 2(c) is a hole for screwing the connecting portion 151 (see Fig. 2(a)) of the slide bar 150. Although not shown, the slide bar 150 is attached to the fixture 130 by fastening a bolt inserted into the other hole of the base member 131 to the inner peripheral side of the cylindrical connecting portion 151.
[0042] The nut 133 is inserted (fitted) into the second groove portion 114b of the groove 114 of the upper central frame 113d. With the nut 133 inserted into the groove 114, the slide bar 150 is attached to the lower surface of the upper central frame 113d via the fixture 130 by fastening the bolt 132 passed through the through-hole of the base member 131 to the nut 133. In this attached state, the slide bar 150 is arranged at the center in the left-right direction (arrow L-R direction) of the box body 110 (see Fig. 2(b)).
[0043] The nut 133 is slidably inserted along the longitudinal direction of the groove 114 (the second groove portion 114b). It is also possible to insert the nut 133 through the opening (the first groove portion 114a) of the groove 114 formed on the side surface of the upper central frame 113d. That is, since the attachment position of the fixture 130 in the longitudinal direction of the groove 114 (the upper central frame 113d) can be changed without disassembling the box body 110, the operation of changing the attachment position of the slide bar 150 can be simplified.
[0044] Note that a groove similar to the groove 114 of the upper central frame 113d is also formed in the lower side frame 111a, and the mounting structure of the lower handle 120 to the lower side frame 111a using the fixture 130 is the same as the mounting structure of the slide bar 150 to the upper central frame 113d.
[0045] A weight 160 is suspended from the hanging portion 152 of the slide bar 150. The weight 160 includes an annular ring 161 that is slidably suspended from the hanging portion 152, a cylindrical shaft member 162 fixed to the ring 161, and a cylindrical weight member 163 through which the shaft member 162 is inserted and detachably held.
[0046] The ring 161 is integrally formed with a frustum-shaped fixing portion 161a for fixing the shaft member 162, and the fixing portion 161a is formed with a threaded hole extending in the radial direction of the ring 161 (the vertical direction in FIG. 2). One end of the shaft member 162 is inserted upward inside the weight member 163. A male thread is formed on the upper end (one end) side of the shaft member 162, and by fastening this male thread to the threaded hole of the fixing portion 161a, the shaft member 162 is attached to the ring 161.
[0047] The weight member 163 is formed with a through hole (a hole extending in the vertical direction in FIG. 2) into which the shaft member 162 can be inserted, and a support portion 162b having an outer shape larger than the inner diameter of the through hole is formed on the lower end (the other end) side of the shaft member 162. By fastening the shaft member 162 inserted into the through hole of the weight member 163 to the fixing portion, the weight member 161 is attached to the ring 161, and in this attached state, the weight member 163 is supported by the support portion 162b of the shaft member 162.
[0048] In this way, the weight 160 is slidably supported by the ring 161 on the hanging portion 152 of the slide bar 150. That is, the slide bar 150 supports the weight 160 so as to be relatively displaceable with respect to the box body 110. Thereby, when the user grips the pair of lower handles 120 and lifts the box body 110 (see FIG. 3), the weight 160 can be slid along the slide bar 150 (hanging portion 152) inside the box body 110.
[0049] In particular, when the box body 110 is lifted such that the slide bar 150 (hanging portion 152) is inclined with respect to the horizontal direction, the weight 160 slides more easily along the slide bar 150. And since the center of gravity of the weight 160 is located above the pair of lower handles 120 (the entire weight 160 is located above the lower handles 120), the center of gravity of the weight 160 can be moved above the gripping position of the handle 120 by the user. Thereby, the sense of instability when lifting the box body 110 can be felt. That is, since the same sense of instability as when lifting a heavy object with moving contents can be felt, it can be made for the user to recognize that it is dangerous to lift a heavy object without checking the state of the contents.
[0050] The weight 160 is slidable in the longitudinal direction (front-rear direction) of the hanging portion 152 (slide bar 150), while the slide in a direction different from the longitudinal direction of the hanging portion 152 (left-right direction) is restricted by the engagement between the hanging portion 152 and the ring 161. Therefore, when the lifted box body 110 tilts forward and backward (see FIG. 3), the center of gravity of the weight 160 easily moves, whereas when the box body 110 tilts in the left-right direction, the center of gravity of the weight 160 hardly moves. In this way, by causing a difference in the ease of movement of the center of gravity of the weight 160, different senses of instability can be felt depending on how the box body 110 is held.
[0051] Also, the extending direction of the hanging part 152 extending in the front-rear direction (arrow F-B direction) is orthogonal to the direction connecting the pair of lower holders 120 (arrow L-R direction). That is, although not shown in the figure, when the box body 110 is viewed from above (when viewed in the direction of arrow B in FIG. 2), the sliding direction of the weight 160 intersects with an imaginary line connecting the pair of lower holders 120 (for example, the longitudinal center of the holding part 122). Thereby, when the user grips the lower holder 120 (holding part 122) and lifts the device, the center of gravity of the weight 160 can be moved forward or backward from the gripping position (see FIG. 3).
[0052] When the center of gravity of the weight 160 moves away from the gripping position of the lower holder 120 by the user, a relatively large force is required to support the movement of the center of gravity. Therefore, for example, compared with the case where the sliding direction of the weight 160 and the direction connecting the pair of lower holders 120 are parallel, the instability when lifting the box body 110 can be increased.
[0053] Also, since the weight 160 is suspended slidably on the slide bar 150 by a support structure, the center of gravity of the weight 160 can be moved. Therefore, compared with the case where the sliding direction (displacement direction) of the weight 160 is guided in one direction using a support structure such as a slide rail, the weight 160 can be slid by a relatively simple structure. Thus, the manufacturing cost of the heavy object feeling device 100 can be reduced.
[0054] Also, since the inner diameter of the ring 161 is larger than the outer diameter of the hanging part 152 and the cross-sectional shape of the ring 161 is circular, the ring 161 (weight 160) can be rotated around the axial direction of the hanging part 152 of the slide bar 150, or the ring 161 (weight 160) can be swung in the longitudinal direction (front-rear direction) of the hanging part 152. Therefore, while sliding the weight 160 along the longitudinal direction of the slide bar 150, the weight 160 can be swung, so that the instability when lifting the box body 110 can be increased.
[0055] On the upper surface of the upper center frame 113d that supports the slide bar 150, an upper handle 170 is detachably attached. The upper handle 170 is a steel member formed by bending a cylindrical pipe into a substantially U shape, and includes a pair of connecting portions 171 extending upward from the upper center frame 113d and a handle portion 172 connecting the upper ends of the pair of connecting portions 171 in the front-rear direction. The connecting portion 171 is attached to the outer surface of the upper center frame 113d via a fixture 130.
[0056] Since the upper handle 170 and the slide bar 150 are attached to the common upper center frame 113d, it is not necessary to separately provide frames for attaching them. As a result, the weight of the weight object feeling device 100 can be reduced.
[0057] The handle portion 172 is disposed at the longitudinal center of the upper center frame 113d. When the weight object feeling device 100 is mainly carried by the user, the handle portion 172 is gripped by the user. However, by lifting the box body 110 with the handle portion 172 (upper handle 170), a different behavior from when the box body 110 is lifted with the lower handle 120 can also be experienced.
[0058] That is, since the weight 160 is provided below the handle portion 172 of the upper handle 170, when the box body 110 is lifted with the handle portion 172 (for example, when the user holds the box body 110 as if lowering it by hand), even if the weight 160 slides along the slide bar 150 and the center of gravity of the entire device moves, it is difficult to feel the instability due to the movement of the center of gravity of the weight 160. Therefore, it is possible to make the user feel that the sense of instability when lifting the weight object feeling device 100 with the lower handle 120 is greater than the sense of instability when lifting the weight object feeling device 100 with the handle portion 172 of the upper handle 170.
[0059] Next, with reference to FIG. 3, a method of using the weight object feeling device 100 will be described. FIG. 3 is a side view of the weight object feeling device 100 in a use state. In FIG. 3, a part of the cover 180 is partially omitted and illustrated. In FIG. 3, a state is illustrated in which a user standing on the rear side (in the direction of arrow B) of the weight object feeling device 100 holds and lifts the holding portions 122 of the pair of lower handles 120 by hand.
[0060] As shown in FIG. 3, when making the user feel the instability when lifting the box body 110 (weight object feeling device 100), the box body 110 is covered with the cover 180. As a result, since the position of the weight 160 is shielded by the cover 180 and cannot be seen, the user cannot perceive the center of gravity position of the weight object feeling device 100. Therefore, for example, when the user lifts the box body 110 in a state where the weight 160 is located on the front side rather than the center in the front-rear direction of the box body 110 (slide bar 150), the box body 110 tends to tilt toward the side where the weight 160 exists (in this embodiment, the front side (in the direction of arrow F)).
[0061] Due to this tilt of the box body 110, the weight 160 slides forward along the slide bar 150, so that the center of gravity of the weight object feeling device 100 moves further forward. Since this movement of the center of gravity of the weight object feeling device 100 (weight 160) occurs above the gripping position of the handle 120 by the user, the user can strongly feel the instability when lifting the box body 110. That is, the behavior when lifting a heavy object whose center of gravity of the contents moves can be experienced.
[0062] In addition, since the box body 110 is covered with the cover 180, it is difficult for the user to imagine the internal structure (a structure in which the weight 160 can slide and swing). Therefore, since it is impossible to imagine that the weight 160 slides and the center of gravity moves, and that the weight 160 swings, the sense of instability when lifting the box body 110 can be increased.
[0063] Since the connecting portions 151 extend upward from both the front and rear ends of the hanging lower portion 152 of the slide bar 150, when the weight 160 slides to the front end or the rear end of the hanging lower portion 152, the ring 161 of the weight 160 contacts the connecting portion 151, and the slide of the weight 160 is restricted by this contact. When the ring 161 contacts the connecting portion 151, due to the inertial force of the slide of the weight 160 along the hanging lower portion 152, the weight 160 swings upward (the front side in the sliding direction) with such a contact portion (connecting portion 151) as a fulcrum.
[0064] After this upward swing, since the weight 160 repeats the swing with respect to the hanging lower portion 152 due to its own weight, the instability when the box body 110 is lifted can be increased.
[0065] The connection portions between the lower ends of the connecting portions 151 and both the front and rear ends of the hanging lower portion 152 are smoothly curved. Therefore, when the ring 161 contacts the connecting portion 151, the ring 161 (weight 160) can be smoothly swung along such a curved portion. Thus, the instability when the box body 110 is lifted can be more effectively increased, and it is difficult to generate a collision sound when the connecting portion 151 and the ring 161 collide. By suppressing such a collision sound, it is difficult for the user to imagine the internal structure of the box body 110, so the sense of instability when the box body 110 is lifted can be increased.
[0066] Of the pair of connecting parts 151 on the front and rear sides of the slide bar 150, the connecting part 151 located on the rear side (the left side in FIG. 3) is arranged near the center in the front-rear direction, and the connecting part 151 located on the front side (the right side in FIG. 3) is arranged on the front side of one of the connecting parts 151. That is, since the entire slide bar 150 (the center in the front-rear direction of the hanging part 152) is arranged biased forward from the center in the front-rear direction of the box body 110, when the ring 161 contacts one of the pair of connecting parts 151, compared with the case where the ring 161 contacts the other connecting part 151, the weight 160 can be swung at a position relatively far (or close) from the center of the box body 110. Therefore, a different sense of instability can be felt when the ring 161 contacts one of the connecting parts 151 and when the ring 161 contacts the other connecting part 151.
[0067] When the weight 160 swings due to the contact between the ring 161 and the connecting part 151, displacement of the weight 160 to the outside of the box body 110 is allowed. That is, since the side surface of the box body 110 is formed only by the four side frames 112 arranged at its four corners, an opening is formed between each side frame 112. And since the slide bar 150 that supports the weight 160 slidably in the front-rear direction is arranged at the center in the left-right direction of the box body 110, when the weight 160 slides along the slide bar 150 (the hanging part 152), the weight 160 is prevented from contacting the side frame 112.
[0068] That is, an opening for allowing the displacement of the weight 160 outward from the box body 110 is formed between the two side frames 112 (arranged side by side left and right) that constitute the front surface of the box body 110, so that a large displacement amount of the weight 160 can be ensured. As a result, the instability when lifting the device can be increased. Further, since the opening is covered by the cover 180, the weight 160 displaced outside the box body 110 contacts the cover 180. Since the cover 180 is formed of a flexible material (for example, a woven fabric knitted from synthetic fibers, a non-woven fabric, or rubber), even when the weight 160 contacts, the contact sound generated at the time of contact can be reduced. Therefore, it is difficult for the user to imagine the internal structure of the box body 110, so the sense of instability when lifting the box body 110 can be increased.
[0069] Also, a sufficient gap is formed between the rear connection portion 151 and the inner surface of the cover 180. When the weight 160 contacts the rear connection portion 151, the weight 160 does not contact the cover 180. Thereby, it is possible to prevent the weight 160 displaced rearward along the slide bar 150 from contacting the user's abdomen or the like via the cover. Therefore, it is difficult for the user to imagine the internal structure of the box body 110, so the sense of instability when lifting the box body 110 can be increased.
[0070] Next, with reference to FIG. 4(a), the change in the mounting position of the slide bar 150 with respect to the box body 110 (upper frame 113) will be described. FIG. 4(a) is a cross-sectional view of the weight device 100 taken along line IVa-IVa in FIG. 2(b). In FIG. 4(a), the weight 160 is omitted from the illustration.
[0071] As shown in FIG. 4(a), grooves 114 similar to the upper center frame 113d are formed in the upper side frame 113a, the front frame 113b, and the rear frame 113c of the upper frame 113 (for the shape of the groove 114, refer to FIG. 2(c)). That is, the connection portion 151 of the slide bar 150 is detachably attached to each of the frames constituting the upper frame 113 via the fixture 130.
[0072] Therefore, for example, while keeping the connection part 151 on the rear side (in the direction of arrow B) of the slide bar 150 illustrated by the solid line in FIG. 4(a) attached to the upper center frame 113d, the bolt 132 of the fixture 130 of the connection part 151 on the front side (in the direction of arrow F) is removed, and the connection part 151 on the front side can be attached to the upper side frame 113a on the right (in the direction of arrow R). As a result, as illustrated by the dashed-dotted line in FIG. 4(a), the slide bar 150 (hanging lower part 152) can be inclined with respect to the front-rear direction.
[0073] In FIG. 4(a), as an example, the case where the connection part 151 (fixture 130) on the front side among the pair of connection parts 151 is attached to the upper side frame 113a on the right side has been described, but it is not limited to this. It is also possible to attach both of the pair of connection parts 151 (fixtures 130) to the upper side frame 113a on the left (in the direction of arrow L). Further, the attachment positions of the pair of connection parts 151 (fixtures 130) may be moved along the longitudinal direction of the upper center frame 113d, and the slide bar 150 (hanging lower part 152) may be arranged at the center of the box body 110 in the front-rear direction, or the slide bar 150 (hanging lower part 152) may be arranged at a position eccentric to the rear side from the center of the box body 110 in the front-rear direction.
[0074] Further, for example, by shifting the attachment position of the upper center frame 113d in the left-right direction or shortening the entire length of the slide bar 150 (hanging lower part 152), it is also possible to attach the slide bar 150 (hanging lower part 152) in a posture along the left-right direction to the upper side frame 113a and the upper center frame 113d.
[0075] In this way, by changing the attachment position of the slide bar 150 with respect to the upper frame 113, the slide direction of the weight 160 along the slide bar 150 can be changed. Therefore, it is possible to experience the movement of the center of gravity of the weights 160 in various directions.
[0076] Next, with reference to FIG. 4(b), the weight object feeling device 200 in the second embodiment will be described. In the first embodiment, the case where the slide bar 150 is disposed biased toward the front (arrow F direction) side in the front-rear direction (arrow F-B direction) of the upper center frame 113d has been described. In contrast, in the second embodiment, the case where the slide bar 250 extends from the front end to the rear end in the front-rear direction of the upper center frame 113d and is disposed at the center in the front-rear direction will be described.
[0077] FIG. 4(b) is a side view of the weight object feeling device 200 in the second embodiment. Note that the same parts as those described in the first embodiment are denoted by the same reference numerals, and the following description thereof is omitted (the same applies in FIGS. 5 and 6).
[0078] As shown in FIG. 4(b), the weight object feeling device 200 of the second embodiment has the same configuration as the weight object feeling device 100 of the first embodiment, except that the length of the hanging portion 252 of the slide bar 250 in the front-rear direction is longer than that of the hanging portion 152 of the first embodiment. Therefore, similar to the first embodiment, the slide bar 250 has a pair of connecting portions 151 extending upward from both longitudinal ends of the hanging portion 252, which are attached to the lower surface of the upper center frame 113d via two fixtures 130.
[0079] According to the weight object feeling device 200 of the second embodiment, since the slide bar 250 extends from the front end side to the rear end side of the upper center frame 113d, a large displacement amount (distance) of the sliding displacement of the weight 160 along the slide bar 250 can be ensured. Therefore, the sense of instability when lifting the box body 110 can be increased.
[0080] Next, referring to FIG. 5, the weight object feeling device 300 in the third embodiment will be described. In the first embodiment, the case where the weight 160 is suspended slidably and swingably from the slide bar 150 was described. In contrast, in the third embodiment, the case where the weight 360 is disposed slidably on the ball roller 351b in the case 350 will be described. FIG. 5(a) is a rear view of the weight object feeling device 300 in the third embodiment, and FIG. 5(b) is a cross-sectional view of the weight object feeling device 300 taken along line Vb-Vb of FIG. 5(a).
[0081] As shown in FIG. 5, the weight object feeling device 300 of the third embodiment includes a case 350 disposed above (in the direction of arrow U) the center in the vertical direction (arrow U-D direction) of the side frame 112, and a weight 360 disposed in the case 350.
[0082] The case 350 includes a box-shaped container 351 with an open upper surface, and a lid 352 that covers the container 351 from above (in the direction of arrow U). On the inner bottom surface 351a of the container 351, a ball roller 351b provided with a rollable ball at its upper end is fixed. A plurality of ball rollers 351b are arranged in each of the left-right direction (arrow L-R direction) and the front-rear direction (arrow F-B direction), and the weight 360 is placed on the plurality of ball rollers 351b. The weight 360 is a substantially rectangular parallelepiped member made of steel.
[0083] When the user lifts the box body 110 with the lower handle 120 and the box body 110 tilts, the weight 360 slides on the ball roller 351b due to this tilt. Since the center-of-gravity shift accompanying the sliding of the weight 360 occurs above the gripping position of the handle 120 by the user, the sense of instability when lifting the box body 110 can be increased.
[0084] Further, since the weight 360 slides due to the rolling of the balls of the ball roller 351b, the frictional resistance when the weight 360 slides can be reduced as compared with the case where the weight 160 (ring 161) slides along the slide bar 150 (hanging lower part 152) as in the first embodiment. Therefore, the movement of the center of gravity of the weight 360 can be smoothed.
[0085] A rubber wall 351d is attached to the entire inner surface of the side wall 351c of the container 351. Since the weight 360 that has slid on the ball roller 351b collides with the rubber wall 351d made of elastic deformable rubber, the impact caused by the collision can be absorbed by the rubber wall 351d. As a result, it is difficult to generate a collision sound caused by the collision between the side wall 351c and the weight 360, so it is difficult for the user to imagine the internal structure of the box body 110. Therefore, the sense of instability when lifting the box body 110 can be increased.
[0086] In addition, since the container 351 and the lid 352 of the case 350 are formed using an opaque material, the structure in which the center of gravity of the weight 360 moves can be hidden from the outside. Therefore, it is possible to make it difficult for the user to imagine the internal structure of the box body 110 while eliminating the need to separately provide a cover 180.
[0087] As described above, the present invention has been described based on the embodiments. However, it can be easily inferred that the present invention is not limited to the above embodiments, and various improvements and modifications are possible without departing from the spirit of the present invention.
[0088] In each of the above embodiments, the lower center frame 111b and the side frame 112 are quadrangular prisms and the groove 114 is not formed. However, the groove 114 may be formed in the lower center frame 111b and the side frame 112.
[0089] In each of the above embodiments, the case where the box body 110 is substantially rectangular parallelepiped has been described, but the present invention is not limited to this. The box body 110 may be substantially cubic, substantially frustum-shaped, substantially conical, substantially cylindrical, or substantially polygonal prism-shaped. That is, the shape of the box body 110 can be appropriately set as long as it can support the weights 160 and 360 (the slide bars 150 and the case 350).
[0090] In the first and second embodiments, the case where the front frame 113b and the rear frame 113c of the upper frame 113 are connected in the front-rear direction by the upper center frame 113d has been described, but the present invention is not limited to this. In addition to the upper center frame 113d, a configuration including a frame that connects between the upper side frame 113a and the upper center frame 113d in the left-right direction (or a direction inclined with respect to the left-right direction), or a configuration including a frame that connects the front frame 113b and the rear frame 113c in the front-rear direction (or a direction inclined with respect to the front-rear direction) may be used. By increasing the number of frames to which the slide bars 150 and 250 (the connection portions 151) can be attached as in these configurations, the variations in the sliding direction of the weight 160 can be increased.
[0091] In the first and second embodiments, the case where the weight 160 abuts against the inner surface of the cover 180 when the weight 160 slides to the connection portion 151 on the front side of the slide bars 150 and 250 has been described, but the present invention is not limited to this. By adjusting the size of the weight 160 (the dimension from the inner peripheral surface of the ring 161 to the lower end of the support portion 162b) and the lengths of the slide bars 150 and 250 (the hanging portions 152 and 252), the weight 160 may be configured not to abut against the cover 180.
[0092] In the above-described first and second embodiments, the case where the inner diameter of the annular ring 161 is larger than the diameters of the slide bars 150 and 250 (suspension parts 152 and 252) has been described, but the present invention is not limited thereto. The ring 161 may be formed in a polygonal (e.g., square) annular shape. Further, a configuration may be adopted in which the inner diameter of the ring 161 formed in a cylindrical shape is made substantially the same as the outer diameter of the slide bars 150 and 250 (suspension parts 152 and 252). In this configuration, the swinging of the weight 160 in the longitudinal direction of the suspension parts 152 and 252 can be restricted.
[0093] In the above-described first and second embodiments, the case where the weight 160 is slid along the slide bars 150 and 250 has been described, but the weight 160 may be slid in a non-swingable manner along a slide rail or a linear guide attached to the lower surface of the upper center frame 113d instead of the slide bars 150 and 250.
[0094] In the above-described first and second embodiments, the case where the pair of connection parts 151 of the slide bars 150 and 250 are connected to the lower surface of the upper center frame 113d (the upper surface inside the box body 110) has been described, but the present invention is not limited thereto. For example, one or both of the pair of connection parts 151 may be omitted, and one or both ends of the suspension parts 152 and 252 may be fixed to the side frames 112. Further, a frame extending vertically or horizontally may be separately provided in the opening between the side frames 112 of the box body 110, and one or both ends of the suspension parts 152 and 252 may be fixed to the frame.
[0095] In the above-described first and second embodiments, the cover 180 has been exemplified as an example of a shielding body for making the internal structure of the box body 110 invisible from the outside, but the present invention is not limited thereto. The inside of the box body 110 may be made invisible by forming an opaque wall in the opening between the side frames 112 of the box body 110 or in the opening between the frames of the upper frame 113, and the cover 180 may be omitted.
[0096] In the above-described third embodiment, the case where the weight 360 is slidably supported by the ball roller 351b provided in the case 350 has been described. However, a configuration in which the weight 460 itself rolls within the case 350 may also be employed. This configuration will be described as a first modification example (weight object sensing device 400) with reference to FIG. 6(a). FIG. 6(a) is a cross-sectional view of the weight object sensing device 400 in the first modification example.
[0097] As shown in FIG. 6(a), the weight object sensing device 400 in the first modification example has the same configuration as the weight object sensing device 300 of the third embodiment, except that the ball roller 351b in the case 350 (container 351) is omitted and the weight 460 housed in the case 350 is a sphere.
[0098] When the user lifts the box body 110 while holding the lower handle 120 and the box body 110 tilts, the weight 460 rolls on the flat bottom surface 351a of the container 351 due to this tilt. Since the shift of the center of gravity accompanying the rolling of this weight 460 occurs above the gripping position of the handle 120 by the user, the sense of instability when lifting the box body 110 can be increased. Also, since the ball roller 351b as in the third embodiment can be dispensed with, the manufacturing cost of the weight object sensing device 400 can be reduced.
[0099] In the first modification example, the case where the weight 460 is a sphere has been described. However, the weight 460 may be formed in a columnar shape. When the weight 460 is columnar, it is preferable to form the distance between the inner surfaces of the container 351 facing each other in the axial direction of the weight 460 to be the same as (or slightly larger than) the length in the axial direction of the weight 460. Thereby, since the rolling direction of the weight 460 is restricted to one direction by the inner surface of such a container 351, a difference can be provided in the direction in which the center of gravity of the weight 460 easily moves.
[0100] In the above-described third embodiment, the case where the weight 360 is stored in the case 350 has been described. However, instead of the weight 360, the case 350 may be filled (encapsulated) with a liquid 560. This embodiment will be described as a second modification example (weight object sensing device 500) with reference to FIG. 6(b). FIG. 6(b) is a cross-sectional view of the weight object sensing device 500 in the second modification example.
[0101] As shown in FIG. 6(b), the weight object sensing device 500 in the second modification example has the same configuration as the weight object sensing device 400 of the first modification example, except that the rubber wall 351d of the case 350 is omitted and a liquid 560 is encapsulated in the case 350 instead of the weight 460. After the container 351 of the case 350 is filled with a liquid 560 such as water, the container 351 and the lid 352 are sealed so that the liquid 560 does not leak.
[0102] When the user lifts the box body 110 while holding the lower handle 120 and the box body 110 tilts, the tilt causes the liquid in the container 351 to flow while generating a liquid level fluctuation. Since the shift of the center of gravity accompanying the flow of this liquid 560 occurs above the gripping position of the handle 120 by the user, the sense of instability when lifting the box body 110 can be increased. In addition, the user can experience the specific behavior when lifting a heavy object including the liquid 560 (such as the convergence and amplification of the liquid level fluctuation of the liquid 560).
[0103] Further, since the content of the case 350 is the liquid 560, even if the box body 110 tilts and the liquid 560 collides with the inner surface of the case 350 (container 351), the impact and the collision sound caused by the collision can be reduced. Therefore, it is difficult to imagine the internal structure of the box body 110 and it is difficult to damage the case 350.
Explanation of Reference Numerals
[0104] 100, 200, 300, 400, 500 Weight object sensing device 110 Box body 120 Lower handle (handle) 150, 250 Slide bar (support) 151 Connection part Lower part of 152,252 suspension Weights (contents) of 160,360,460 Ring of 161 Cover (shield) of 180 Case (support) of 350 Ball roller (roller) of 351b Liquid (contents) of 560
Claims
1. A pair of handles for a user to hold, a box body provided with the pair of handles on both side surfaces and having contents stored therein, and a support attached to the box body and supporting the contents so as to be relatively displaceable with respect to the box body. The weight object feeling device is characterized in that the center of gravity of the contents is located above the pair of handles.
2. The weight object feeling device according to claim 1, wherein the support guides the displacement of the contents along one direction while restricting the displacement of the contents in a direction different from the one direction.
3. The weight object feeling device according to claim 2, wherein the displacement direction of the contents along the one direction intersects a virtual line connecting the pair of handles in a top view of the box body.
4. The weight object feeling device according to claim 2, wherein the support is a rod-shaped slide bar from which the contents are slidably suspended.
5. The weight object feeling device according to claim 4, wherein the attachment position of the slide bar with respect to the box body is changeable.
6. The weight object feeling device according to claim 4, wherein the contents are suspended from the slide bar and include an annular ring having an inner diameter larger than the diameter of the slide bar.
7. The slide bar includes a hanging portion extending in the one direction from which the ring is suspended, and a connecting portion extending upward from an end portion of the hanging portion in the one direction and connected to an upper surface inside the box body. The weight object feeling device according to claim 6, wherein the sliding displacement of the ring with respect to the hanging portion is restricted by contact between the ring and the connecting portion.
8. The connecting portion is provided in a pair on both end sides of the hanging portion in the one direction. The weight object feeling device according to claim 7, wherein the hanging portion is disposed at a position eccentric from the center of the box body in the one direction.
9. The weight object feeling device according to claim 1, further comprising a shielding body that makes the inside of the box body invisible from the outside.
10. An opening is formed on a side surface of the box body to allow displacement of the contents to the outside of the box body. The weight object feeling device according to claim 9, wherein the opening is covered by the flexible shielding body.
11. The support is a box-shaped case fixed to the box body above the pair of handles. The weight object feeling device according to claim 1, wherein the content having a circular cross section is housed in the case.
12. The support is a box-shaped case fixed to the box body above the pair of handles, The weight object feeling device according to claim 1, wherein the case includes rollers that roll on the inner bottom surface thereof and slidably support the content.
13. The support is a box-shaped case fixed to the box body above the pair of handles, The weight object feeling device according to claim 1, wherein the content is a liquid enclosed in the case.