Elevation shelf device

Abstract

To provide an elevation shelf device that prevents a danger of a shelf member unintentionally and suddenly falling from a high place at the time of earthquake.SOLUTION: An engaged piece 7 is installed to project at a first link 21 in front of a parallel link mechanism 5 that elevates and lowers a shelf member on which a storage object is placed. When earthquake occurs, a latch body 8 of a lock device 10 engages with the engaged piece 7.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lifting shelf device.

Background Art

[0002] Conventionally, the applicant has proposed various lifting shelf (storage) devices. For example, in the invention of Patent Document 1 below, a "damper" is added to the lifting shelf to control the lowering speed when pulling it out manually, and it is excellent as a lifting shelf that can operate safely and slowly without generating impact noise. Also, the invention of Patent Document 2 below is excellent as a lifting shelf that can smoothly perform forward and backward reciprocating movement and vertical rocking movement.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, there has been a strong demand for safety measures to prevent personal accidents caused by the collapse of shelves, chests, etc. and the fall of items at high places when an earthquake or the like occurs. However, the reality is that almost no safety measures have been implemented for the lifting shelf devices installed in various stores and their backyards, etc. when an earthquake occurs.

[0005] Therefore, an object of the present invention is to prevent the shelf member of the lifting shelf device at a high place from suddenly moving downward rapidly when vibrations such as an earthquake occur. Moreover, an object of the present invention is to surely prevent the unexpected downward movement of the shelf member with a simple structure.

Means for Solving the Problem

[0006] In an elevating shelf device provided with a parallel link mechanism in which a shelf member for placing stored items is configured to move up and down via the parallel link mechanism, and in the uppermost raised state of the shelf member, a front first link and a rear second link that are substantially vertical: the proximal end of the first link is pivotally attached to a predetermined fixed portion by a pivot shaft; and a locking device that detects vibration during an earthquake and switches a latch body to a protruding state is disposed at the predetermined fixed portion, and a locked piece of the first link is configured to be locked to the latch body during an earthquake.

[0007] In an elevating shelf device provided with a parallel link mechanism in which a shelf member for placing stored items is configured to move up and down via the parallel link mechanism, and in the uppermost raised state of the shelf member, a front first link and a rear second link that are substantially vertical: the proximal end of the first link is pivotally attached to a predetermined fixed portion by a pivot shaft, and a locking device that detects vibration during an earthquake and switches a latch body to a protruding state is disposed at a position above the pivot shaft in the predetermined fixed portion by a predetermined dimension; and during an earthquake, the first link itself is configured to be locked to the latch body at a position above the pivot shaft.

[0008] In addition, a pair of left and right locking devices are provided. In addition, a latch tip contact plate piece that prevents the latch body from protruding excessively and accidentally detaching from the locked piece when the latch body is locked to the locked piece of the first link is continuously provided on the locked piece. In addition, an L-shaped latch receiving member in cross section that prevents the latch body from accidentally detaching in a state where the latch body is locked to the first link is fixed to the first link.

Effect of the Invention

[0009] According to the present invention, by forming the engaged piece in a protruding shape and adding a locking device, great safety can be obtained. In various stores and their backyards, etc., when an earthquake occurs, the risk of the shelf member (with tableware etc. placed on it) suddenly descending from a high place can be prevented. Furthermore, in a store or backyard, etc., when an earthquake occurs, it can be prevented that the evacuation passage is blocked by the descending shelf member and the evacuation of people is obstructed. Moreover, it is also possible to easily and inexpensively modify a conventional elevating shelf.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Best Mode for Carrying Out the Invention

[0011] Hereinafter, the present invention will be described in detail based on the illustrated embodiments. As shown in FIG. 1, the lifting shelf device according to the present invention includes a shelf member 1 for placing stored items, a pair of left and right mounting bases 3, 3 fixed to a wall surface 2 or the like, and a parallel link mechanism 5 whose tips are pivotally attached to the left and right side wall plate portions 11 of the shelf member 1 and whose proximal ends are pivotally attached to the mounting substrate 3. In particular, it is preferably applied to a lifting shelf device without a cabinet (outer box).

[0012] The shelf member 1 is movable up and down by means of a parallel link mechanism 5 between a storage state shown by a virtual line in FIG. 1 and a downward completed position at the front lower side shown by a solid line. The shelf member 1 moves up and down via the parallel link mechanism 5. In the uppermost state of the shelf member 1 - that is, the state shown by the virtual line in FIG. 1 and the state shown in FIG. 2 - the front first link 21 and the rear second link 22 of the parallel link mechanism 5 are in a substantially vertical state (a state slightly over to the rear).

[0013] The proximal end 21A of the front first link 21 is pivotally attached to a predetermined fixed portion 6 by a pivot shaft 23. In the illustrated example, the case where the predetermined fixed portion 6 is the mounting substrate 3 is shown. Note that the proximal end 22A of the rear second link 22 is pivotally attached to the predetermined fixed portion 6 by a pivot shaft 24. Also in this case, the mounting substrate 3 corresponds to the predetermined fixed portion 6.

[0014] By the way, a locked piece 7 for locking (detachably) to a latch body 8 described later is projected from the proximal end 21A of the first link 21. The embodiment shown in FIGS. 2 to 7 will be described. A locked piece 7 having a small width dimension is projected downward from the proximal end 21A of the first link 21 by a notch 9 (as shown in FIGS. 4 and 5). In other words, the locked piece 7 having a small width dimension is formed at a position below the pivot shaft 23.

[0015] Furthermore, a thin plate piece 12 that covers the notch 9 shown in FIG. 4 from the side outside is fixed to the first link 21 by a fixing tool 13 such as a screw. And, on the mounting substrate 3 as the predetermined fixing portion 6, a locking device 10 having a structure capable of detecting vibration during an earthquake and switching the latch body 8 to a protruding state is disposed.

[0016] In this way, the locked piece 7 formed to protrude from the first link 21 is locked to the latch body 8 during an earthquake. Note that parallel link mechanisms 5 are disposed on the left end face and the right end face of the shelf member 1, respectively. The locking devices 10 are disposed so as to correspond to the respective parallel link mechanisms 5, and ultimately, a pair of left and right locking devices 10 are disposed.

[0017] Also, as shown in FIGS. 6 to 7 or FIGS. 9 to 10, when the latch body 8 is locked to the locked piece 7 of the first link 21, the thin plate piece 12 can prevent the latch body 8 from swinging and protruding excessively. That is, when the latch body 8 is locked to the locked piece 7, it is possible to prevent the latch body 8 from protruding excessively and unexpectedly detaching from the locked piece 7. In other words, the thin plate piece 12 continuously provided integrally with the locked piece 7 is a latch tip abutting plate piece 20 that prevents the latch body 8 from protruding excessively and unexpectedly detaching from the locked piece 7 when the latch body 8 is locked to the locked piece 7 of the first link 21.

[0018] Here, the locking device 10 will be described. As shown in FIGS. 8, 9, and 10, the locking device 10 includes a fixed casing 27 having a substantially rectangular or substantially elliptical shallow accommodation recess 26, and has the latch body 8 accommodated in the recess 26 of the casing 27 so as to be swingable by a pin 28. 29 is a seismic sensing member, which is in the shape of a flat inverted quadrangular pyramid, and has a small pin portion 30 protruding from the lower end. The small pin portion 30 of the seismic sensing member 29 is inserted into the small recess 31 formed on the bottom surface of the accommodation recess 26 of the fixed casing 27, and the seismic sensing member 29 can perform a pendulum motion as shown in FIGS. 9 to 10 during an earthquake.

[0019] Then, along with the vibration during an earthquake, the upper end portion 29T of the seismic member 29 moves within the accommodation recess 26 as shown in FIGS. 9 to 10, and pushes out the tip portion 8A of the latch body 8. Specifically, the latch body 8 is formed with concave groove portions 32 having arcuate gradients at both ends, and the upper end portion 29T of the seismic member 29 is movable in the left - right direction of FIGS. 9 and 10 within these concave groove portions 32. In the state of FIG. 10, the seismic member 29 that has moved to the right rides over the arcuate gradient on the right side of the concave groove portion 32 of the latch body 8, and the tip portion 8A of the latch body 8 protrudes upward in FIG. 10.

[0020] As shown in FIG. 10, since the tip portion 8A of the latch body 8 maintains a protruding state, even if the locked piece 7 attempts to move (swing) as indicated by the arrow N7, it is blocked by the tip portion 8A of the latch body 8. In this way, by preventing the movement (swing) of the locked piece 7 in the direction of the arrow N7 (in FIG. 10), as shown in FIGS. 3 and 5, the swing of the first link 21 about the pivot shaft 23 in the direction of the arrow M 21 can surely be prevented.

[0021] Next, FIGS. 11 to 14 show another embodiment of the present invention. (As shown in FIG. 1,) the shelf member 1 for placing stored items moves up and down via the parallel link mechanism 5, and in the uppermost state of the shelf member 1, the front first link 21 and the rear second link 22 that are substantially vertical, and the point of including the parallel link mechanism 5 are the same in the embodiments shown in FIGS. 11 to 14.

[0022] However, as shown in FIGS. 11 to 14, during an earthquake, the arrangement position etc. of the locking device 10 that detects vibration and switches the latch body 8 to a protruding state are different. Specifically described, the base end 21A of the first link 21 is pivotally attached to a predetermined fixed portion 6 by the pivot shaft 23, and at a position above the pivot shaft 23 in the predetermined fixed portion 6 (mounting base 3) by a predetermined dimension H, a locking device 10 that detects vibration during an earthquake and switches the latch body 8 to a protruding state (see FIG. 14) is arranged.

[0023] The above-mentioned predetermined dimension H is the distance between the axis of the lower pivot shaft 23 of the first link 21 and the axis of the upper pivot shaft (not shown in the figure), and is denoted as L. 21 If it is set as 0.2 ·L 21 ≦H≦0.4 ·L 21 ···(Equation 1) Then it is set as follows. More preferably, 0.25·L 21 ≦H≦0.35·L 21 ···(Equation 2) it is better to set it like this. In this way, in FIGS. 11 to 14, the locking device 10 is disposed at a position sufficiently above the lower pivot shaft 23 of the first link 21. When an earthquake occurs as shown in FIGS. 13 and 14, the first link 21 itself locks directly to the latch body 8 at a position above the pivot shaft 23 (see FIGS. 13 and 14).

[0024] And, as shown in FIGS. 11 to 14, a latch receiving member 15 in which a locking piece 15A is bent inward by screws 14, 14, etc. is fixed to the strip-shaped first link 21. The locking piece 15A directly locks to the tip 8A of the latch body 8 of the locking device 10. That is, a latch receiving member 15 having a cross-sectional L-shape that prevents the above-mentioned latch body 8 from accidentally detaching while being locked to the above-mentioned first link 21 is fixed to the above-mentioned first link 21.

[0025] In addition, in the embodiments of FIGS. 1 to 7 and FIGS. 11 to 14, the case where the predetermined fixing portion 6 is a small mounting substrate 3 has been described. However, it is freely possible to make design changes such as using a large front-opening box body as the lifting shelf device and using the left and right side walls of the box body as the predetermined fixing portion 6. Also, the locking device 10 is not limited to the earthquake-sensitive member 29 as shown in FIG. 8, and it is freely possible to use an inverted conical shape, an inverted hexagonal pyramid shape, or alternatively, a rugby ball shape, a spherical shape, a barbaral shape, etc.

[0026] As described in detail above, in the lifting and lowering shelf device in which the shelf member 1 for placing stored items is configured to move up and down via a parallel link mechanism 5, in the uppermost state of the shelf member 1, the front first link 21 and the rear second link 22 that are substantially vertical are provided in the parallel link mechanism 5. The proximal end 21A of the first link 21 is pivotally attached to a predetermined fixed portion 6 by a pivot shaft 23. The predetermined fixed portion 6 is provided with a locking device 10 that detects vibration during an earthquake and switches the latch body 8 to a protruding state, so that the locked piece 7 of the first link 21 is configured to be locked to the latch body 8 during an earthquake. (As is clear from FIGS. 1 to 3), since the locking device 10 is disposed at the (left and right) side portions of the front opening where the shelf member 1 is pulled forward from the storage state, the installation work and the operation inspection work of the (small-sized) locking device 10 can be easily and quickly performed. Further, since the locking device 10 is small and has precise components, if the locked member vibrates or swings greatly or has a large displacement during an earthquake, the locking device 10 may be damaged or malfunction. However, in the present invention, the locked piece 7 protruding from the proximal end 21A of the first link, which resonates or vibrates excessively less during an earthquake, is locked to the latch body 8, so that the locking device 10 does not need to be damaged (even in the worst case).

[0027] Further, in the present invention, a shelf member 1 for placing stored items is configured to move up and down via a parallel link mechanism 5. In the uppermost state of the shelf member 1, in an elevating shelf device provided with the parallel link mechanism 5, a front first link 21 and a rear second link 22 that are substantially vertical: a proximal end 21A of the first link 21 is pivotally attached to a predetermined fixing portion 6 by a pivot shaft 23, and a locking device 10 that detects vibration during an earthquake and switches a latch body 8 to a protruding state is disposed at a position above the pivot shaft 23 in the predetermined fixing portion 6 by a predetermined dimension H. During an earthquake, the first link 21 itself is configured to lock to the latch body 8 at a position above the pivot shaft 23. (As is clear from FIGS. 11 to 14,) the latch body 8 is locked to the first link 21 at a position above the pivot shaft 23 by a sufficient dimension H. During an earthquake, the load (vector) acting on the latch body 8 can be small. Therefore, the risk of damage to the latch body 8 of the locking device 10 can be reduced. Moreover, (as can be seen from FIGS. 11 and 13,) the space of the fixing portion 6 where the locking device 10 is installed is sufficiently wide, and a latch body 8 (locking device 10) with a relatively large strength can be used, reducing the risk of damage to the locking device 10.

[0028] In addition, since a pair of the locking devices 10 are arranged on the left and right, during an earthquake, when looking at the elevating shelf device from the front, there may be differences in vibration intensity, vibration direction, etc. between the left and right sides, but at least one of the left and right sides can operate sensitively to ensure safety.

[0029] Further, when the latch body 8 locks to a locked piece 7 of the first link 21, a latch tip contact plate piece 20 that prevents the latch body 8 from protruding excessively and accidentally detaching from the locked piece 7 is connected to the locked piece 7. Thus, the contact plate piece 20 guides and ensures that the latch tip portion 8A is securely locked to the locked piece 7 of the first link 21 so that the latch tip portion 8A does not protrude excessively.

[0030] In addition, since the latch receiving member 15 having a cross-sectional L shape that prevents the latch body 8 from accidentally disengaging while being locked to the first link 21 is fixed to the first link 21, (as shown in FIGS. 12 to 14), the latch tip portion 8A is surely in a state of being locked to the first link 21, and moreover, the locked state is maintained without being accidentally released.

Explanation of Reference Numerals

[0031] 1 Shelf member 5 Parallel link mechanism 6 Predetermined fixed portion 7 Locked piece 8 Latch body 10 Locking device 15 Latch receiving member 20 Latch tip contact plate piece 21 First link 21A Base end 22 Second link 23 Pivot shaft H Predetermined dimension

Claims

1. A shelf member (1) for placing stored items is configured to move up and down via a parallel link mechanism (5). In the uppermost raised state of the shelf member (1), a front first link (21) and a rear second link (22) that are substantially vertical are provided in a lifting shelf device provided with the parallel link mechanism (5). A proximal end (21A) of the first link (21) is pivotally attached to a predetermined fixed portion (6) by a pivot shaft (23), and A locking device (10) for detecting vibration during an earthquake and switching a latch body (8) to a protruding state is disposed in the predetermined fixed portion (6), and a locked piece (7) of the first link (21) is configured to be locked to the latch body (8) during an earthquake. The lifting shelf device is characterized in that.

2. A shelf member (1) for placing stored items is configured to move up and down via a parallel link mechanism (5). In the uppermost raised state of the shelf member (1), a front first link (21) and a rear second link (22) that are substantially vertical are provided in a lifting shelf device provided with the parallel link mechanism (5). A proximal end (21A) of the first link (21) is pivotally attached to a predetermined fixed portion (6) by a pivot shaft (23), and a locking device (10) for detecting vibration during an earthquake and switching a latch body (8) to a protruding state is disposed at a position above the pivot shaft (23) in the predetermined fixed portion (6) by a predetermined dimension (H). During an earthquake, the first link (21) itself is configured to be locked to the latch body (8) at a position above the pivot shaft (23). The lifting shelf device is characterized in that.

3. The lifting shelf device according to claim 1 or 2, wherein a pair of the locking devices (10) are arranged on the left and right.

4. The lifting shelf device according to claim 1, wherein a latch tip abutting plate piece (20) for preventing the latch body (8) from protruding excessively and unexpectedly detaching from the locked piece (7) when the latch body (8) is locked to the locked piece (7) of the first link (21) is continuously provided on the locked piece (7).

5. The lifting shelf device according to claim 2, further comprising a latch receiving member (15) having an L-shaped cross section that prevents the latch body (8) from accidentally disengaging while being locked to the first link (21), the latch receiving member (15) being fixed to the first link (21).

Images