Windshield device

Abstract

To improve the usability of attaching and detaching a panel member.SOLUTION: A windshield device includes a windshield member and a frame member. A pair of rotating wheels are provided on an upper end of an outer panel of the windshield member. The frame member has a guide rail 50 that suspends and supports the outer panel by supporting the rotating wheels and guides the rotating wheels in a sliding direction. A gripping portion is provided on an outer surface of the outer panel. The guide rail 50 has an upper surface portion 51 and a lower surface portion 52. The upper surface portion 51 has a first upper surface portion 511 that extends along the sliding direction, and a second upper surface portion 512 that suppresses a movement of the rotating wheels in a first direction when the second upper surface portion is connected to a rear end of the first upper surface portion 511, is inclined downward toward a first direction (rearwardly) and receives an operation for gripping the gripping portion and pulling the outer panel in the first direction.SELECTED DRAWING: Figure 17

Description

[Technical Field]

[0001] The present disclosure relates to a windshield device for a scale. [Background technology]

[0002] In precision balances such as electronic balances, a windshield device (windshield case) has traditionally been installed to surround the weighing pan in order to ensure weighing accuracy. The space inside the windshield device can become dirty due to scattering of samples to be weighed, so it needs to be cleaned from time to time. Patent Document 1 discloses a windshield device that can be easily attached and detached to the balance body to facilitate such cleaning.

[0003] In the windshield device described in Patent Document 1, a rotating wheel provided at the upper end of a side panel (sliding door) is arranged on a guide rail formed by a frame. The rotating wheel is guided by the guide rail, allowing the side panel to slide forward and backward, and the side panel can be removed by pulling it rearward. In the windshield device, a stopper member is provided at the rear end of the guide rail as a fall-prevention mechanism to prevent the side panel from unintentionally falling off when the side panel is opened or closed. The stopper member is configured to be switchable between a closed state in which the rear end of the guide rail is blocked by the stopper member and an open state in which the rear end of the guide rail is not blocked by the stopper member. By switching the stopper member to the closed state, the side panel can be prevented from falling off. On the other hand, by switching the stopper member to the open state, the rotating wheel of the side panel can be pulled out from the rear end of the guide rail. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2017-219501 Summary of the Invention [Problem to be solved by the invention]

[0005] The stopper member described above can adequately prevent the side panel from falling off. However, it requires the user to switch the stopper member to the open position when removing the side panel. Furthermore, if the user forgets to switch the stopper member to the closed position and slides the side panel rearward forcefully, the side panel may fall off unintentionally. Furthermore, because such a stopper member is relatively small due to space constraints, there is a risk of it being damaged or lost.

[0006] Therefore, one aspect of the present disclosure has an object to provide a windshield device that can improve usability regarding the attachment and detachment operation of panel members. [Means for solving the problem]

[0007] A windshield device according to one aspect of the present disclosure is a windshield device attached to a scale body. The windshield device includes a windshield member that surrounds a weighing space in the scale body where an object to be weighed is placed, and a support member that supports the windshield member. The windshield member is arranged on at least one side surface of the weighing space other than the top surface, and has a panel member that is slidably supported by the support member. A pair of rotating wheels are provided at the upper end of the panel member and are spaced apart in the sliding direction of the panel member. The support member supports the pair of rotating wheels to suspend and support the panel member, and has a guide portion that guides the pair of rotating wheels in the sliding direction. A grip portion is provided on the outer surface of the panel member opposite the side facing the weighing space. The guide portion has an upper surface portion and a lower surface portion that are arranged to face each other in the vertical direction with the pair of rotating wheels sandwiched therebetween. An opening is provided at a first end of the guide portion in the sliding direction for attaching and detaching the pair of rotating wheels to and from the guide portion. The upper surface portion has a first upper surface portion extending along the sliding direction, and a second upper surface portion connected to an end portion on the first end side of the first upper surface portion, inclined downward toward a first direction that is a direction toward the first end along the sliding direction, and which abuts against the first rotating wheel located on the first direction side of the pair of rotating wheels when an operation is performed to grasp the gripping portion and pull the panel member in the first direction, thereby suppressing movement of the first rotating wheel in the first direction.

[0008] In the above-described windshield device, an opening for attaching and detaching the pair of rotating wheels is provided at a first end of a guide section that supports and guides the pair of rotating wheels provided at the upper end of the panel member. The pair of rotating wheels can be easily attached and detached through this opening. The upper surface of the guide section has a first upper surface section and a second upper surface section. In the section where the first upper surface section is provided, the pair of rotating wheels can be moved along the sliding direction to smoothly open and close the panel member. Meanwhile, when a user grasps the gripping section and pulls the panel member in a first direction, the first rotating wheel, which is located on the first direction side, contacts the second upper surface section, thereby suppressing movement of the first rotating wheel toward the opening. In the above-described windshield device, the panel member main body is suspended and supported by the guide section via the pair of rotating wheels. With this structure, when the first rotating wheel contacts the second upper surface section and movement of the first rotating wheel toward the opening is stopped, a moment is generated that tends to rotate the panel member diagonally upward in the first direction. As a result, a reaction force from the second upper surface portion (i.e., a force pushing the first rotating wheel in the opposite direction to the first direction) acts on the first rotating wheel, suppressing movement of the first rotating wheel in the first direction. Therefore, it is possible to effectively suppress unintentional detachment of the panel member (pair of rotating wheels) from the guide portion. Furthermore, when it is desired to remove the panel member (pair of rotating wheels) from the guide portion, the user can remove the panel member relatively easily by pulling it out while applying a downward force to the panel member. As described above, with the above-mentioned windshield device, it is possible to improve usability regarding the operation of attaching and detaching the panel member by realizing a mechanism for preventing the panel member from falling off without providing a conventional stopper member.

[0009] The gripping portion may be located below the center position of the panel member in the vertical direction. The greater the distance from the guide portion that suspends and supports the panel member to the gripping portion, the greater the moment described above. Furthermore, the greater the moment described above, the greater the reaction force from the second upper surface portion acting on the first rotating wheel, making it possible to more effectively suppress movement of the first rotating wheel in the first direction. Therefore, with the above configuration, the moment described above can be made greater than when the gripping portion is located above the center position of the panel member in the vertical direction, thereby effectively preventing the panel member (first rotating wheel) from unintentionally falling off.

[0010] The upper surface portion may have a third upper surface portion provided between the first end of the second upper surface portion and the opening, the third upper surface portion having a smaller slope than the second upper surface portion. According to the above configuration, the provision of the third upper surface portion increases the vertical width of the opening, allowing the rotating wheel to be smoothly inserted and removed from the guide portion through the opening. This improves the ease of attaching and detaching the panel member to and from the guide portion.

[0011] The lower surface portion may have a first lower surface portion extending in the sliding direction and a second lower surface portion connected to the first end of the first lower surface portion and inclined downward toward the first direction. According to the above configuration, by slowly applying a downward force while pulling the panel member in the first direction, the first rotating wheel can be smoothly pulled out of the guide portion along the second lower surface portion. Therefore, usability when removing the panel member can be improved.

[0012] The guide portion may have a first section, a second section, and a third section arranged in this order along the first direction. The first section is a section in which a first upper surface portion and a first lower surface portion face each other, and the width between the upper surface portion and the lower surface portion is constant. The second section is a section in which a second upper surface portion is provided, and the width between the upper surface portion and the lower surface portion gradually decreases toward the first direction. The third section is a section in which a second upper surface portion and a second lower surface portion are provided, and the width between the upper surface portion and the lower surface portion gradually increases toward the first direction. The diameter of the rotating wheel may be smaller than the width between the upper surface portion and the lower surface portion in the first section, and larger than the width between the upper surface portion and the lower surface portion at the boundary between the second section and the third section. At least one of the upper surface portion and the lower surface portion may be configured to be elastically deformable so that the rotating wheel can pass between the second section and the third section. According to the above configuration, the first rotating wheel can be reliably brought into contact with the upper surface and the lower surface at the boundary between the second section and the third section, which makes it possible to more effectively prevent the panel member (first rotating wheel) from unintentionally falling off.

[0013] The second lower surface portion may have a first portion that is continuous with the first lower surface portion and is curved so that the gradient gradually increases in the first direction, and the boundary between the second section and the third section may be located on the first portion. According to the above configuration, the second section is formed by a portion of the first portion having a gradient smaller than that of the second upper surface portion, and the third section is formed by a portion of the first portion having a gradient larger than that of the second upper surface portion. Furthermore, by forming the first portion into a curved surface, the change in the vertical width of the guide portion (i.e., the distance between the upper surface portion and the lower surface portion) near the boundary between the second section and the third section can be made gradual, thereby suppressing damage (wear) to the rotating wheel due to friction between the guide portion and the rotating wheel.

[0014] The second lower surface portion may have a second portion connected to an end portion of the first portion on the first end side and inclined at a constant gradient toward the first direction, and the gradient of the second portion of the second lower surface portion may be greater than the gradient of the second upper surface portion. According to the above configuration, by aligning the rotating wheel along the second portion with a constant gradient, the rotating wheel can be smoothly attached and detached from the guide portion. [Effects of the Invention]

[0015] According to the present disclosure, it is possible to provide a windshield device that can improve the usability regarding the operation of attaching and detaching panel members. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a windshield device according to an embodiment, seen from the front. [Figure 2] FIG. 2 is a perspective view of the windshield device as seen from the rear. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 1A is a front view and FIG. 1B is a top view of a side panel. [Figure 6] 1A and 1B are a front view and a top view showing the state in which the outer panel and the inner panel are overlapped. [Figure 7] FIG. [Figure 8] FIG. 2(a) is a plan view of the upper panel, and FIG. 2(b) is a cross-sectional view taken along line AA. [Figure 9] FIG. [Figure 10] 10A and 10B are diagrams showing a connection form between a base frame and a side plate frame. [Figure 11] FIG. 10 is a top view of an upper frame integrated with a guide-forming member. [Figure 12] 12A and 12B are a side view and a rear view of the upper frame of FIG. 11. [Figure 13] 10 is a diagram showing the connection between the guide forming member and the guide member cover as viewed from the back side. FIG. [Figure 14] 10 is a top view of the connection between the guide forming member and the guide member cover. FIG. [Figure 15] FIG. 12 is a side view of the frame member of FIG. 11. [Figure 16]16(a) is a cross-sectional view taken along line AA in FIG. 15, and FIG. 16(b) is a cross-sectional view taken along line BB in FIG. [Figure 17] FIG. 4 is a cross-sectional view showing the vicinity of an opening of the guide rail. [Figure 18] 10A and 10B are diagrams illustrating changes in the state of the rotating wheel when the rotating wheel is pulled out in a first direction from within the guide rail. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present disclosure will be described in detail with reference to the drawings. In the following description, the same or equivalent elements will be designated by the same reference numerals, and redundant description will be omitted.

[0018] FIG. 1 is a perspective view of the windshield device 1 according to this embodiment, as seen from the front. FIG. 2 is a perspective view of the windshield device 1, as seen from the rear. FIG. 3 is an exploded perspective view of the windshield device 1. The windshield device 1 is attached to the balance body 100. The windshield device 1 is a device for surrounding a weighing space S (i.e., a space in which a weighing dish 101 is placed) in which an object to be weighed is placed in the balance body 100. The windshield device 1 has a windshield member 2 and a frame member 3 (support member).

[0019] The windshield member 2 is a member that surrounds the measurement space S. The windshield member 2 has four transparent panel members. Each panel member is made of, for example, glass or plastic. The four panel members are composed of a front panel 21 disposed in front of the measurement space S, a pair of side panels 22 disposed on both the left and right sides of the measurement space S, a top panel 23 disposed above the measurement space S, and a rear panel 24 disposed at the rear of the measurement space S. Each side panel 22 is composed of two panels, an outer panel 25 and an inner panel 26. The top panel 23 is composed of two panels, an upper panel 27 and a lower panel 28. The side panels 22 are supported by a frame member 3 (guide rails 50 and 60, described later) so as to be slidable in the front-to-rear direction (the sliding direction of the side panels 22).

[0020] The frame member 3 is a member that supports the windshield member 2. The windshield member 2 is supported by the frame member 3 and is fixed to the balance body 100 via the frame member 3 (a base frame 31 described below). The frame member 3 has the base frame 31, a side plate frame 32, an upper frame 33, a guide forming member 34, and a guide member cover 35.

[0021] FIG. 4 is a perspective view of the side panel 22 arranged on the right side of the measurement space S. FIG. 5 is (a) a front view and (b) a top view of the side panel 22. FIG. 6 is (a) a front view and (b) a top view showing the state in which the outer panel 25 and the inner panel 26 are overlapped. The mounting structure of the side panel 22 will be described with reference to FIGS. 4 to 6. The side panel 22 arranged on the left side of the measurement space S has a configuration that is symmetrical to the side panel 22 shown in FIG. 4.

[0022] A pair of rotating wheels 251, 252 spaced apart in the front-rear direction and a holding member 253 that rotatably holds the rotating wheels 251, 252 are provided at the upper end of the outer panel 25. The rotating wheel 251 (first rotating wheel) is attached near the rear end of the holding member 253, and the rotating wheel 252 (second rotating wheel) is attached near the front end of the holding member 253. In other words, the rotating wheel 251 is provided rearward of the rotating wheel 252.

[0023] A pair of rotating wheels 261, 262 arranged spaced apart in the front-rear direction, and a holding member 263 that rotatably holds the rotating wheels 261, 262 are provided at the upper end of the inner panel 26. The rotating wheel 261 (first rotating wheel) is attached near the rear end of the holding member 263, and the rotating wheel 262 (second rotating wheel) is attached near the front end of the holding member 263. In other words, the rotating wheel 261 is provided rearward of the rotating wheel 262.

[0024] A grip portion 22a for opening and closing the side panel 22 is attached to the outer surface of the outer panel 25 opposite to the side (inner surface) facing the measurement space S. A user can open or close the side panel 22 by holding the grip portion 22a and pulling it in the front-to-rear direction. The holding member 253 of the outer panel 25 is fixed to the outer surface of the outer panel 25 so that the rotating wheels 251, 252 are located outside the outer panel 25 (on the side opposite the measurement space S). On the other hand, the holding member 263 of the inner panel 26 is fixed to the inner surface of the inner panel 26 so that the rotating wheels 261, 262 are located inside the inner panel 26 (on the measurement space S side).

[0025] 5(b), engagement portions 254 are provided at both ends of the holding member 253 in the front-rear direction, protruding in the opposite direction (i.e., inward) from the side (outward) where the rotating wheels 251, 252 are located with respect to the outer panel 25. On the other hand, engagement portions 264 are provided at both ends of the holding member 263 in the front-rear direction, protruding in the opposite direction (i.e., outward) from the side (inward) where the rotating wheels 261, 262 are located with respect to the inner panel 26.

[0026] The protruding height of the engagement portions 254 and 264 is set so that the engagement portions 254 and 264 do not come into contact with each other when the outer panel 25 and the inner panel 26 are overlapped. An engagement piece 255 is fixed to the inside of the engagement portion 254 on the rear side of the outer panel 25, and has a protruding height greater than that of the engagement portion 254 so as to engage with the engagement portion 264 of the holding member 263 of the inner panel 26. The engagement piece 255 is disposed between the two engagement portions 264 of the holding member 263 of the inner panel 26.

[0027] According to the above configuration, even if the outer panel 25 moves rearward (to the right in the figure) from the state shown in FIG. 5, the inner panel 26 does not move until the engagement portion 254 to which the engagement piece 255 is fixed reaches the position shown in FIG. 6. When the outer panel 25 moves further rearward from the state shown in FIG. 6, the engagement piece 255 pushes the engagement portion 264 on the rear side of the inner panel 26 rearward, so the inner panel 26 moves rearward together with the outer panel 25. Conversely, when the outer panel 25 moves forward (to the left in the figure) from the state shown in FIG. 6, the inner panel 26 does not move until the engagement portion 254 to which the engagement piece 255 is fixed reaches the position shown in FIG. 5. When the outer panel 25 moves further forward from the state shown in FIG. 5, the engagement piece 255 pulls the engagement portion 264 on the front side of the inner panel 26 forward, so the inner panel 26 moves forward together with the outer panel 25.

[0028] Due to the coordinated operation of the outer panel 25 and the inner panel 26 as described above, when the side of the windshield device 1 (i.e., the side panel 22) is fully opened, the outer panel 25 and the inner panel 26 overlap each other in the fully open position, as shown in Fig. 6. On the other hand, when the side of the windshield device 1 is closed, the outer panel 25 and the inner panel 26 are in the state shown in Fig. 5, and close the side of the measurement space S.

[0029] Fig. 7 is a perspective view of the upper panel 23. Fig. 8(a) is a plan view of the upper panel 23, and Fig. 8(b) is a cross-sectional view taken along line AA in Fig. 8(a). The mounting structure of the upper panel 23 will be described with reference to Figs. 7 and 8.

[0030] 7, the upper panel 23 is provided with a panel frame 41 into which one end (the right end in this embodiment) of the upper panel 27 and the lower panel 28 is fitted, and a panel frame 42 into which the other end (the left end in this embodiment) of the upper panel 27 and the lower panel 28 is fitted. A grip 23a for opening and closing the upper panel 23 is attached to the outer surface (top surface) of the upper panel 23. By moving the upper panel 27 within the panel frames 41, 42, the upper side of the measurement space S can be opened.

[0031] As shown in FIG. 8 , the panel frames 41 and 42 are provided with grooves into which the ends of the upper panel 27 and the lower panel 28 fit. The grooves are wide enough to accommodate the ends of the lower panel 28, allowing the upper panel 27 to slide above the lower panel 28. A notch 43 is provided on the upper side of one of the panel frames (the panel frame 41 in this embodiment) to open up a portion of the groove. The length of the notch 43 in the front-to-rear direction is set to be slightly longer than the widths of the upper panel 27 and the lower panel 28. The upper panel 27 and the lower panel 28, whose ends fit into the panel frames 41 and 42, can be removed one by one through the notch 43. The outer lateral surfaces of the panel frames 41 and 42 are provided with protruding strips 44 used to support the upper panel 23 with the guide-forming member 34.

[0032] Fig. 9 is a perspective view of the frame member 3. Fig. 10 is a diagram showing a state in which the base frame 31 and the side plate frame 32 are joined together. Fig. 11 is a top view of the upper frame 33 integrated with the guide forming member 34.

[0033] 3, 9, and 10, the base frame 31 is configured by integrating a front frame 11, a pair of left and right side frames 12, and a rear frame 13. As shown in Fig. 10, the base frame 31 is configured so that the front frame 11 is located at the front ends of the side frames 12, and the rear frame 13 is located forward of the rear ends of the side frames 12.

[0034] The front frame 11 is provided with an insertion groove 111 into which the lower edge of the front panel 21 is inserted. Also, as shown in Figures 3 and 10, the inside of the front frame 11 is provided with a claw 112 that fits into an engagement hole 103 provided on the rising edge on the front side of a shield plate 102 fixed to the balance body 100 when the windshield device 1 is attached to the balance body 100.

[0035] The side frames 12 are provided with guide protrusions 121 arranged intermittently along the front-to-rear direction to guide the lower ends of the side panels 22. The side frames 12 also have hanging pieces 122 that come into contact with the side surfaces of the housing of the balance body 100 when the windshield device 1 is attached to the balance body 100.

[0036] The rear frame 13 is provided with an insertion groove 131 into which the lower edge of the rear panel 24 is inserted. In addition, both left and right ends of the rear frame 13 are provided with side plate fixing portions 132 to which connecting portions 321 provided at the lower ends of the side plate frames 32 are fixed. A one-touch engagement means (cam lever) 130 (see Figure 2) is fixed to the rear surface of the rear frame 13. When attaching or detaching the windshield device 1 to or from the balance body 100, this means can be attached or detached with a single touch to an engagement hole provided on the rising edge on the rear side of the shield plate 102.

[0037] Fig. 9 shows the state in which the connecting portions 321 of the side plate frame 32 are connected to the side plate fixing portions 132 of the rear frame 13. Fig. 10 shows the connecting method. The side plate frame 32 has connecting portions 321 of the same shape at both its lower and upper ends.

[0038] 10 , the side panel fixing portion 132 has two engagement holes 133 at positions offset from the center of the surface against which the bottom surface of the connecting portion 321 abuts, and has a through-hole 134 on a surface perpendicular to that surface. Meanwhile, the connecting portion 321 has two protrusions 322 on the surface against which the side panel fixing portion 132 abuts, and has a screw hole 323 on a surface perpendicular to that surface. When fixing the side panel frame 32 to the rear frame 13, the two protrusions 322 of the connecting portion 321 are fitted into the two engagement holes 133 of the side panel fixing portion 132. Then, the positions of the through-holes 134 of the side panel fixing portion 132 and the screw holes 323 of the connecting portion 321 are aligned, so that the screws SC are inserted from the through-hole 134 side and screwed into the screw holes 323 to fix the side panel frame 32 to the rear frame 13.

[0039] The left and right side plate frames 32 are provided with insertion grooves 324 into which the left and right edges of the rear panel 24 are inserted. When the left and right side plate frames 32 are fixed to the rear frame 13, the insertion grooves 324 of each side plate frame 32 are connected to the insertion grooves 131 of the rear frame 13. An upper frame 33 integrated with a guide forming member 34 is connected to the connecting portions 321 at the upper ends of the left and right side plate frames 32 fixed to the rear frame 13.

[0040] Fig. 11 is a top view of the upper frame 33 integrated with the guide-forming member 34. Fig. 12 is (a) a side view and (b) a back view of the upper frame 33. Fig. 13 is a view of the joined state of the guide-forming member 34 and the guide member cover 35 as seen from the back side.

[0041] The upper frame 33 has side panel fixing portions 332 on both the left and right ends thereof, which are similar to the side panel fixing portions 132 of the rear frame 13. The side panel fixing portions 332 have two engagement holes 333 into which two protrusions 322 provided on the connecting portion 321 at the upper end of the side panel frame 32 fit, and a through hole 334 facing the screw hole 323 of the connecting portion 321.

[0042] The method for joining the side plate frames 32 and the upper frame 33 is the same as the method for joining the side plate frames 32 and the rear frame 13. That is, the two protrusions 322 of the joining portion 321 are fitted into the two engagement holes 333 of the side plate fixing portion 332, and screws are inserted from the through-hole 334 side and screwed into the screw holes 323 of the joining portion 321, thereby fixing the left and right side plate frames 32 to the upper frame 33.

[0043] The upper frame 33 is provided with an insertion groove 331 into which the upper edge of the rear panel 24 is inserted. After the lower side and left and right edges of the rear panel 24 are fitted into the insertion grooves 131, 324 of the rear frame 13 and the left and right side panel frames 32, the upper frame 33 and the left and right side panel frames 32 are joined together, so that all side edges of the rear panel 24 are held by the rear frame 13, the left and right side panel frames 32, and the upper frame 33.

[0044] FIG. 14 is a top view of the connection between the guide forming member 34 and the guide member cover 35. As shown in FIG. 14, the guide member cover 35 has a fixing piece 351 with a through hole 352. When fixing the side plate fixing portion 332 of the upper frame 33 to the connecting portion 321 of the side plate frame 32 with a screw, the position of the through hole 352 of the guide member cover 35 covering the guide forming member 34 is aligned with the position of the through hole 334 of the side plate fixing portion 332 of the upper frame 33, and the tip of the screw inserted into the through hole 352 and the through hole 334 is screwed into the screw hole 323 of the connecting portion 321. In this way, the guide member cover 35 can be connected to the upper frame 33 and the guide forming member 34 fixed to the side plate frame 32 (see FIG. 13).

[0045] Additionally, the upper end of the front panel 21 is sandwiched between the front end of the guide forming member 34 and the guide member cover 35 that covers the front end. The lower edge of the front panel 21 fits into the insertion groove 111 of the front frame 11. Additionally, the upper end of the front panel 21 is sandwiched between the guide member cover 35 and the guide forming member 34. As a result, the front panel 21 is stably fixed to the frame member 3.

[0046] The guide member cover 35 connected to the guide forming member 34 cooperates with the guide forming member 34 to form a guide rail that guides the rotating wheels 251, 252, 261, 262 attached to the side panel 22 (outer panel 25 and inner panel 26), and also forms a support portion that supports the protruding strip 44 of the upper panel 23.

[0047] Figure 15 is a side view of the frame member 3 of Figure 11. Figure 16(a) is a cross-sectional view taken along line AA in Figure 15, and Figure 16(b) is a cross-sectional view taken along line BB in Figure 15. The position of line AA in Figure 15 corresponds to the position where a restricting member 353 (see Figure 13) that prevents the inner panel 26 from moving forward is provided.

[0048] The guide member cover 35 forms a guide rail 50 (guide portion) for the rotating wheels 251, 252 provided on the outer panel 25 over the entire length of the movable range of the outer panel 25 (i.e., from the front end to the rear end of the guide member cover 35). The guide rail 50 has a lower surface portion 52 on which the rotating wheels 251, 252 are supported, and an upper surface portion 51 facing the lower surface portion 52. The rotating wheels 251, 252 roll while supported by the lower surface portion 52, thereby being movable in the front-rear direction in the space formed between the upper surface portion 51 and the lower surface portion 52. In other words, the guide rail 50 supports the rotating wheels 251, 252, thereby suspending and supporting the outer panel 25 and guiding the rotating wheels 251, 252 in the front-rear direction. An opening 50a is provided at the rear end (first end) of the guide rail 50 for attaching and detaching the rotating wheels 251, 252 to and from the guide rail 50.

[0049] The guide forming member 34 and the guide member cover 35 form a guide rail 60 (guide portion) for the rotating wheels 261, 262 provided on the inner panel 26 over the entire length of the movable range of the inner panel 26 (i.e., from the position of the limiting member 353 to the rear end of the guide forming member 34). The guide rail 60 has a lower surface portion 62 on which the rotating wheels 261, 262 are supported, and an upper surface portion 61 facing the lower surface portion 62. The upper surface portion 61 is formed by the guide member cover 35, and the lower surface portion 62 is formed by the guide forming member 34. The rotating wheels 261, 262 roll while being supported by the lower surface portion 62, thereby being movable in the front-rear direction in the space formed between the upper surface portion 61 and the lower surface portion 62. In other words, the guide rail 60 supports the rotating wheels 261, 262, thereby suspending and supporting the inner panel 26 and guiding the rotating wheels 261, 262 in the front-rear direction. At the rear end (first end) of the guide rail 60, an opening (common to the opening 50a for attaching and detaching the rotating wheels 261 and 262 to and from the guide rail 60) is provided.

[0050] The guide forming member 34 also has a support portion 342 that supports the protruding strip 44 of the upper panel 23. The guide member cover 35 also has a restraining portion 355 that holds down the protruding strip 44 resting on the support portion 342 from above.

[0051] With reference to FIG. 17, the mechanism for preventing the side panel 22 of the windshield device 1 from falling off will be described. FIG. 17 is a cross-sectional view showing the vicinity of the opening 50a of the guide rail 50. FIG. 17 also shows the vertical width X of the guide rail 50 (i.e., the distance between the upper surface portion 51 and the lower surface portion 52) at each position along the front-to-rear direction. Note that the guide rail 60, which supports and guides the rotating wheels 261, 262 of the inner panel 26, also has a configuration similar to that of the guide rail 50. Therefore, when the rotating wheel 251 contacts the second upper surface portion 512, the outer panel 25 and the inner panel 26 move in the same manner while overlapping each other. In other words, the behavior of the inner panel 26 within the guide rail 60 is similar to the behavior of the outer panel 25 within the guide rail 50. Therefore, the following description will focus on the guide rail 50 and the outer panel 25.

[0052] The top surface portion 51 has a first top surface portion 511 and a second top surface portion 512. The first top surface portion 511 is a portion that extends in the horizontal direction (front-rear direction). The second top surface portion 512 is connected to the rear end portion (the end portion on the first end side) of the first top surface portion 511 and is inclined downward toward a first direction D (a direction toward the first end along the front-rear direction), which is a direction in which the rotating wheels 251, 252 are pulled out. In this embodiment, the first direction D is a direction toward the rear of the windshield device 1. When a user grasps the grip portion 22a and performs an operation to pull the side panel 22 (outer panel 25) in the first direction D, the second top surface portion 512 abuts against the rotating wheel 251 located on the first direction side (i.e., the rear) of the rotating wheels 251, 252, thereby suppressing movement of the rotating wheel 251 in the first direction D.

[0053] In the windshield device 1 described above, an opening 50a is provided at the rear end of the guide rail 50 for attaching and detaching the pair of rotating wheels 251, 252. The pair of rotating wheels 251, 252 can be easily attached and detached via this opening 50a. The upper surface 51 of the guide rail 50 has a first upper surface 511 and a second upper surface 512. In the section where the first upper surface 511 is provided, the pair of rotating wheels 251, 252 can be moved in the front-to-rear direction to smoothly open and close the outer panel 25. On the other hand, when a user holds the grip portion 22a and pulls the outer panel 25 in the first direction D, the rotating wheel 251 of the pair of rotating wheels 251, 252 located on the first direction D side (i.e., rearward) comes into contact with the second upper surface 512, thereby suppressing movement of the rotating wheel 251 toward the opening 50a. Furthermore, in the windshield device 1, the main body of the outer panel 25 is suspended and supported on the guide rail 50 (lower surface portion 52) via a pair of rotating wheels 251, 252. With this structure, a moment M (see FIG. 18(b)) that tends to rotate the outer panel 25 obliquely upward in the first direction D is generated in the main body of the outer panel 25. Furthermore, the action of the moment M presses the rotating wheel 251 against the second upper surface portion 512. As a result, a reaction force F (i.e., a force that pushes the rotating wheel 251 in the direction opposite to the first direction D; see FIG. 18(b)) acts on the rotating wheel 251 from the second upper surface portion 512, thereby restricting movement of the rotating wheel 251 in the first direction D. Therefore, unintentional detachment of the outer panel 25 (rotating wheel 251) from the guide rail 50 can be effectively prevented. Furthermore, when it is desired to remove the outer panel 25 (rotating wheels 251, 252) from the guide rails 50, the user can remove the outer panel 25 relatively easily by applying a downward force to the outer panel 25 and pulling it out. As described above, the windshield device 1 realizes a mechanism for preventing the outer panel 25 from falling off without providing a conventional stopper member, thereby improving the usability of the operation for attaching and detaching the side panel 22. More specifically, it is possible to prevent the outer panel 25 from falling off unintentionally without providing a stopper member that blocks the opening 50a.This reduces the time and effort required to switch the stopper member between the open and closed states, and eliminates the need to worry about damage or loss of the stopper member.

[0054] Furthermore, the gripping portion 22a is provided below the center position in the vertical direction of the outer panel 25. The greater the distance from the guide rail 50, which suspends and supports the outer panel 25, to the gripping portion 22a, the greater the moment M described above. Furthermore, the greater the moment M described above, the greater the reaction force F from the second upper surface portion 512 acting on the rotating wheel 251, and the more effectively movement of the rotating wheel 251 in the first direction D can be suppressed. Therefore, with the above configuration, the moment M and reaction force F can be made larger than when the gripping portion 22a is provided above the center position in the vertical direction of the outer panel 25, and therefore unintentional detachment of the outer panel 25 (the rotating wheel 251) can be effectively prevented.

[0055] The top surface portion 51 has a third top surface portion 513 that is provided between the rear end of the second top surface portion 512 and the opening and has a slope smaller than that of the second top surface portion 512. In this embodiment, the second top surface portion 512 has a slope corresponding to an inclination angle α (>0), while the slope of the third top surface portion 513 is 0 (i.e., parallel to the horizontal direction). According to the above configuration, the provision of the third top surface portion 513 can increase the vertical width of the opening 50a, so that the rotating wheels 251, 252 can be smoothly inserted into and removed from the guide rail 50 via the opening 50a. Therefore, the usability of the attachment and detachment operation of the outer panel 25 (the rotating wheels 251, 252) to and from the guide rail 50 can be improved.

[0056] The lower surface portion 52 has a first lower surface portion 521 and a second lower surface portion 522. The first lower surface portion 521 is a portion that extends in the horizontal direction (front-rear direction). That is, the first lower surface portion 521 is a portion that extends parallel to the first upper surface portion 511. The first lower surface portion 521 faces the first upper surface portion 511. The second lower surface portion 522 is connected to the rear end of the first lower surface portion 521 and is inclined downward in the first direction D. According to the above configuration, by pulling the outer panel 25 in the first direction D while slowly applying a downward force, the rotating wheel 251 can be smoothly pulled out of the guide rail 50 along the second lower surface portion 522. Therefore, usability when removing the outer panel 25 can be improved. In addition, in the front-to-back direction, the boundary between the first upper surface portion 511 and the second upper surface portion 512 (the starting position of the second upper surface portion 512) may coincide with the boundary between the first lower surface portion 521 and the second lower surface portion 522 (the starting position of the second lower surface portion 522), or may be slightly offset forward or backward.

[0057] The guide rail 50 has a first section S1, a second section S2, and a third section S3 arranged in this order along the first direction D. The first section S1 is a section in which a first upper surface portion 511 and a first lower surface portion 521 face each other, and the width between the upper surface portion 51 and the lower surface portion 52 is constant (x1). The second section S2 is a section in which at least a second upper surface portion 512 is provided, and the width between the upper surface portion 51 and the lower surface portion 52 gradually decreases toward the first direction D. The third section is a section in which a second upper surface portion 512 and a second lower surface portion 522 are provided, and the width between the upper surface portion 51 and the lower surface portion 52 gradually increases toward the first direction D. In addition, the diameter of the rotating wheel 251 is smaller than the width x1 between the upper surface portion 51 and the lower surface portion 52 in the first section S1, and is larger than the width x2 (minimum width) between the upper surface portion 51 and the lower surface portion 52 at the boundary between the second section S2 and the third section S3.

[0058] Furthermore, at least one of the upper surface portion 51 and the lower surface portion 52 is configured to be elastically deformable so that the rotating wheel 251 can pass between the second section S2 and the third section S3. That is, when the outer panel 25 is pulled in the first direction D, the rotating wheel 251 gets caught at the boundary between the second section S2 and the third section S3, and then by pulling the outer panel 25 in the first direction D while applying a downward force, the width between the upper surface portion 51 and the lower surface portion 52 can be slightly widened to allow the rotating wheel 251 to pass through. The same applies when the rotating wheel 251 is attached to the guide rail 50. That is, the rotating wheel 251 is inserted into the guide rail 50 through the opening 50a, and after the rotating wheel 251 gets caught at the boundary between the second section S2 and the third section S3, the outer panel 25 is further pushed in the direction opposite to the first direction D, thereby slightly widening the width between the upper surface portion 51 and the lower surface portion 52 and allowing the rotating wheel 251 to pass through.

[0059] According to the above configuration, the rotating wheel 251 can be reliably brought into contact with the upper surface portion 51 and the lower surface portion 52 at the boundary between the second section S2 and the third section S3. This makes it possible to more effectively prevent the outer panel 25 (rotating wheel 251) from unintentionally falling off.

[0060] The second lower surface portion 522 has a first portion 522a that is continuous with the first lower surface portion 521 and is formed in a curved shape such that the gradient gradually increases in the first direction D. The boundary between the second section S2 and the third section S3 is located on the first portion 522a. According to the above configuration, the second section S2 can be formed by a portion of the first portion 522a whose gradient is smaller than that of the second upper surface portion 512 (i.e., a portion of the first portion 522a closer to the first lower surface portion 521), and the third section S3 can be formed by a portion of the first portion 522a whose gradient is larger than that of the second upper surface portion 512 (i.e., a portion of the first portion 522a farther from the first lower surface portion 521). Furthermore, by forming the first portion 522a into a curved shape, the change in the vertical width of the guide rail 50 (i.e., the distance between the upper surface portion 51 and the lower surface portion 52) near the boundary between the second section S2 and the third section S3 can be made gentler, thereby suppressing damage (wear) to the rotating wheels 251, 252 due to friction between the guide rail 50 and the rotating wheels 251, 252.

[0061] Further, the second lower surface portion 522 has a second portion 522b that is connected to the rear end of the first portion 522a and that slopes at a constant gradient toward the first direction D. The gradient of the second portion 522b of the second lower surface portion 522 is greater than the gradient of the second upper surface portion 512. That is, the slope angle β of the second portion 522b is greater than the slope angle α of the second upper surface portion 512. According to the above configuration, by aligning the rotating wheels 251, 252 along the second portion 522b, which has a constant gradient, the rotating wheels 251, 252 can be smoothly attached to and detached from the guide rail 50.

[0062] FIG. 18 is a diagram illustrating changes in the state of the rotating wheel 251 when the rotating wheel 251 is pulled out of the guide rail 50 in the first direction D. FIG. 18(a) illustrates a state in which the rotating wheel 251 contacts the lower surface portion 52 at position p1, which is the boundary between the first section S1 and the second section S2. FIG. 18(b) illustrates a state in which the rotating wheel 251 contacts the lower surface portion 52 at position p2, which is the boundary between the second section S2 and the third section S3. FIG. 18(c) illustrates a state in which the rotating wheel 251 contacts the lower surface portion 52 at position p3, which is the boundary between the first portion 522a and the second portion 522b. FIG. 18(d) illustrates a state in which the rotating wheel 251 contacts the lower surface portion 52 at position p4, which is immediately below the boundary between the second upper surface portion 512 and the third upper surface portion 513.

[0063] In the state shown in FIG. 18(a), the rotating wheel 251 does not come into contact with the upper surface portion 51, and therefore moves smoothly in the first direction D along the lower surface portion 52. In the state shown in FIG. 18(b), the rotating wheel 251 comes into contact with the upper surface portion 51 (second upper surface portion 512). At this time, the moment M described above is generated. As a result, the rotating wheel 251 presses the second upper surface portion 512, and receives the reaction force F from the second upper surface portion 512. As a result, even if a user tries to grab the grip portion 22a and pull out the outer panel 25 in the first direction D, the reaction force F acts to prevent the rotating wheel 251 from moving in the first direction D. Furthermore, in this embodiment, in the state shown in FIG. 18(b), the rotating wheel 251 is sandwiched between the upper surface portion 51 and the lower surface portion 52, and therefore movement of the rotating wheel 251 in the first direction D is more effectively suppressed.

[0064] 18(b), the user can move the rotating wheel 251 in the first direction D by holding not only the grip portion 22a but also the main body of the outer panel 25 (for example, the upper part of the outer panel 25) and pulling in the first direction D while applying a downward force. In the state of FIG. 18(c), the gap between the upper surface portion 51 and the lower surface portion 52 gradually widens, and as a result, the rotating wheel 251 and the upper surface portion 52 begin to separate from each other. Thereafter, in the state of FIG. 18(d), the gap between the upper surface portion 51 and the lower surface portion 52 widens further, and as a result, the rotating wheel 251 can be smoothly removed from the opening 50a.

[0065] The windshield device according to the present disclosure is not limited to the above-described embodiment. For example, in the above-described embodiment, the side panel 22 is composed of two outer panels 25 and an inner panel 26. However, the side panel 22 may be composed of one panel or three or more panels. Furthermore, in the above-described embodiment, the front panel 21 and the rear panel 24 are fixed, and the side panel 22 is configured as a sliding door. However, the front panel and the rear panel may also be configured as sliding doors. That is, the front panel and the rear panel may have the same configuration as the side panel 22 in the above-described embodiment. In this case, the position of the guide rail formed by the frame member 3 may also be changed. Furthermore, the number of rotating wheels attached to the upper part of the side panel 22 is not limited to two as exemplified in the above-described embodiment. For example, one or more additional rotating wheels may be provided between the pair of rotating wheels 251, 252 (or the pair of rotating wheels 261, 262). [Explanation of symbols]

[0066] 1...windshield device, 2...windshield member, 3...frame member (support member), 22a...gripping portion, 50, 60...guide rail (guide portion), 50a...opening, 51, 61...upper surface portion, 52, 62...lower surface portion, 61...upper surface portion, 251, 261...rotating wheel (first rotating wheel), 252, 262...rotating wheel (second rotating wheel), 511...first upper surface portion, 512...second upper surface portion, 513...third upper surface portion, 521...first lower surface portion, 522...second lower surface portion, 522a...first portion, 522b...second portion, D...first direction, S...measuring space, S1...first section, S2...second section, S3...third section.

Claims

1. A windshield device attached to the balance body, a windshield member surrounding a weighing space in which an object to be weighed is placed in the scale body; a support member that supports the windshield member, the windshield member has a panel member that is disposed on at least one side surface of the measurement space other than the top surface and is slidably supported by the support member; a pair of rotating wheels spaced apart in a sliding direction of the panel member are provided at an upper end of the panel member; the support member supports the pair of rotating wheels to suspend and support the panel member, and has a guide portion that guides the pair of rotating wheels in the sliding direction, a grip portion is provided on an outer surface of the panel member opposite to a side facing the measurement space, the guide portion has an upper surface portion and a lower surface portion that are arranged to face each other in the vertical direction with the pair of rotating wheels therebetween, an opening for attaching and detaching the pair of rotating wheels to and from the guide part is provided at a first end of the guide part in the sliding direction; The upper surface portion is a first upper surface portion extending along the sliding direction; a second upper surface portion connected to an end portion of the first upper surface portion on the first end side, inclined downward toward a first direction that is a direction toward the first end along the sliding direction, and that, when an operation of grasping the grip portion and pulling the panel member in the first direction is performed, abuts against a first rotating wheel of the pair of rotating wheels that is located on the first direction side, thereby suppressing movement of the first rotating wheel in the first direction; Windshield device.

2. The gripping portion is provided below the center position of the panel member in the up-down direction. The windshield device according to claim 1.

3. the upper surface portion has a third upper surface portion provided between the end portion of the second upper surface portion on the first end side and the opening, the third upper surface portion having a smaller slope than the second upper surface portion; The windshield device according to claim 1 or 2.

4. The lower surface portion is a first lower surface portion extending along the sliding direction; a second lower surface portion connected to an end portion of the first lower surface portion on the first end side and inclined downward in the first direction, The windshield device according to any one of claims 1 to 3.

5. the guide portion has a first section, a second section, and a third section arranged in this order along the first direction, the first section is a section in which the first upper surface portion and the first lower surface portion face each other and a width between the upper surface portion and the lower surface portion is constant; the second section is a section in which at least the second upper surface portion is provided, and a width between the upper surface portion and the lower surface portion gradually decreases in the first direction; the third section is a section in which the second upper surface portion and the second lower surface portion are provided, and a width between the upper surface portion and the lower surface portion gradually increases in the first direction; a diameter of the rotating wheel is smaller than a width between the upper surface portion and the lower surface portion in the first section and is larger than a width between the upper surface portion and the lower surface portion at a boundary between the second section and the third section; At least one of the upper surface portion and the lower surface portion is configured to be elastically deformable so that the rotating wheel can pass between the second section and the third section. The windshield device according to claim 4.

6. the second lower surface portion has a first portion that is continuous with the first lower surface portion and is formed in a curved shape such that the gradient gradually increases in the first direction, a boundary between the second section and the third section is located on the first portion; The windshield device according to claim 5.

7. the second lower surface portion has a second portion connected to an end portion of the first portion on the first end side and inclined at a constant gradient toward the first direction, The slope of the second portion of the second lower surface portion is greater than the slope of the second upper surface portion.

7. The windshield device according to claim 6.

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