JP3756059B2 - Buffer member for moving shelf and moving shelf using the buffer member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a moving shelf buffer member and a moving shelf using the buffer member.
[0002]
[Prior art]
A plurality of mobile shelves can be arranged side by side, and moved so as to form a space serving as a work path only on the front surface of the mobile shelves where goods are to be taken in and out, and the other mobile shelves can be kept close to each other. Therefore, there is an advantage that a limited space can be efficiently used. There are various types of driving means for the moving shelf, which push the moving shelf main body directly by human power, rotational operation in which the rotating force of the rotating operation handle by human power is transmitted to the traveling wheel via the speed reduction mechanism, and the traveling wheel is rotationally driven There are a handle type and an electric type driven by a motor. There is also a power assist type moving shelf belonging to the electric category. The power assist type moving shelf was proposed by the present applicant, and when the right-handed or left-handed operation switch of the moving shelf to be moved is selected and operated, the moving shelf is moved to the right or left by the motor during the operation. Driven to the left, the movable shelf is stopped by stopping the operation of the operation switch. The invention according to Japanese Patent Application No. 2000-55198 is one of them.
[0003]
Regardless of the driving method, not all the moving shelves move in the same direction at the same time, and it is a daily occurrence that the moving shelves collide with each other. When the mobile shelves directly collide with each other, a large impact sound is generated due to the contact between the metals, and the stored articles may fall or fall due to the impact force. Is installed. Conventionally, a general buffer member is made of rubber having a hardness of about 80 °, and the buffer member is attached to the frame of the movable shelf or the upper part of the side panel to avoid contact between metals. In addition, the hardness in this specification means the hardness measured using the type A hardness meter in JIS K6253.
[0004]
[Problems to be solved by the invention]
However, the conventional cushioning member made of rubber has not been able to obtain satisfactory performance as a cushioning member for a moving shelf. In particular, recent motorized movable shelves are required to increase the speed in order to quickly form a work path, so that even if the shelves collide at high speed, the shock absorbing member is sufficiently absorbed. High performance is desired. The power assist type moving shelf described above is suitable for realizing high speed, and accordingly, realization of a high performance buffer member is desired.
[0005]
The present invention has been made to meet such a demand, and even when the moving shelves collide at high speed, it can effectively absorb impact sound and impact force and prevent the stored articles from falling or falling. It is an object of the present invention to provide a moving shelf cushioning member and a movable shelf using the cushioning member.
[0006]
[Means for Solving the Problems]
Movable shelf first aspect of the present invention, a plurality of movable shelves which are placed so as to be running on rails mounted in pairs facing surfaces you adjacent, to mitigate the impact force when the movable rack collide with each other a use buffer member, the buffer member, consist laminate of a rubber softer cushioning material than the rubber, the laminate, the rubber is fixed on to the cushioning material as a base integral The buffer member is fixed to the front surface of the movable shelf and receives an impact force from the stacking direction.
[0007]
According to the invention of claim 1 Symbol placement, when the impact force in the stacking direction is applied to the cushioning member, is first buffered by a soft cushioning material than rubber, it is then buffered by the rubber. By buffering in stages in this way, a large buffering effect can be obtained, and by using this as a buffering member for the moving shelf, it is possible to effectively mitigate noise and impact when the moving shelves collide with each other. Can do.
[0009]
According to a second aspect of the present invention, in the first aspect of the present invention, the cushioning material and the rubber have a central hole penetrating them, and the cushioning member made of the cushioning material and the rubber is formed by a bolt passed through the central hole. It is fixed to a movable shelf, and when the movable shelf collides with the buffer member, the buffer material and the rubber contract using the bolt as a guide .
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the cushioning material is mainly composed of silicon, the cushioning material and the rubber are cylindrical or disk-shaped, and the thickness of the cushioning material is 5 to 20 mm. It is characterized by that.
[0010]
According to a fourth aspect of the present invention, the cushioning member according to any one of the first to third aspects is attached to a surface opposite to the frame and the upper part of the adjacent movable shelf on the frame and the upper part of the movable shelf. The present invention relates to a moving shelf characterized in that when the shelves collide with each other, the impact member attached to the frame comes into contact first, and then the impact member attached to the upper part of the movable shelf comes into contact.
When the mobile shelves collide with each other, the impact member attached to the frame first comes into contact, and then the impact member attached to the top of the mobile shelf comes into contact and is buffered in two stages. An effect can be obtained.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a moving shelf buffer member and a moving shelf using the buffer member according to the present invention will be described with reference to the drawings.
In FIG. 1, the code | symbol 1 has shown the electrically driven movement shelf. The electric movable shelf 1 has a frame 11 at the bottom, and a traveling wheel 10 is rotatably supported in the frame 11. The traveling wheel 10 can rotate along the rail 9, whereby the electric movable shelf 1 can travel along the rail 9. In FIG. 1, two electric movable shelves 1 are mounted on the rail 9, but the number of the electric movable shelves 1 is arbitrary. Although not shown, each movable shelf 1 has a motor as a drive source, and the movement of the movable shelf 1 to the right or left is controlled by forward / reversely controlling the motor.
[0013]
In FIG. 1, each of the electric movable shelves 1 is a front surface where left and right surfaces are taken in and out, and is movable in a direction perpendicular to the front surface. A side plate 2 is attached to the side surface of each electric movable shelf 1. The side plate 2 may be a single plate that covers the entire side surface of the movable shelf 1, may be divided into a plurality of plates, and further covers only a part of the side surface, for example, the lower portion of the side surface. It may be a plate. Operation panels 3 and 4 are provided on the left and right sides of the side plate 2, respectively. Various operation switches 5 and 6 are attached to the left operation panel 3, and various operation switches 7 and 8 are attached to the right operation panel 4, respectively. As various operation switches, there are a switch operated to make an emergency stop, and the like in addition to an open command switch that is selectively operated to form a passage.
[0014]
There are various operation methods or driving methods for the electric movable shelf 1, and any method may be selected and adopted. For example, when an open command switch attached to the right operation panel 4 is operated, the movable shelf 1 is adjacent to the left or right side so that a work path is formed on the right side of the movable shelf 1. The motor may be controlled so that the movable shelf 1 moves to the right. In the example shown in FIG. 1, the operation panels 3 and 4 are attached to the left and right of one movable shelf 1, but the operation panel may be provided only on either the right or left side. For example, when there is an operation panel only on the right side, by operating an open command switch on the operation panel of a certain mobile shelf 1, a work path is formed on the right side of the mobile shelf 1. The motor is controlled.
[0015]
Each moving shelf 1 is provided with a buffer member that relaxes the impact force when the moving shelves collide with each other on the surface facing the adjacent moving shelves. More specifically, the buffer member 20 is attached to the surface of the frame 11 of the movable shelf 1 facing the frame 11 of the adjacent movable shelf 1. In addition, a buffer member 15 is attached to a surface of the upper part of the movable shelf 1 facing the upper part of the adjacent movable shelf 1. In the example shown in FIG. 1, the buffer members 20 are attached to the left and right sides of the undercarriage 11, and thus both the opposing surfaces of the adjacent movable shelves 1. On the other hand, the buffer member 15 is attached to the upper part of the movable shelf 1 only on one of the opposing surfaces of the adjacent movable shelf 1.
[0016]
The details of the buffer member 15 attached to the upper part of the movable shelf 1 are shown in FIG. In FIG. 2, the side edge of the side plate 2 is bent at a right angle toward the front side of the movable shelf 1, and the cushioning member 15 is placed on the same plane as the front side of the side plate 2 or parallel to the front side. Installed. The buffer member 15 is formed of a laminate of a rubber 17 and a buffer material 16 that is softer than the rubber 17. The rubber 17 is fixed and integrated on the buffer material 16 as a base, and the buffer material 16 is fixed to the front side of the side plate 2. Therefore, the shock absorbing material 16 and the rubber 17 are stacked and protruded toward the moving shelf 1 facing each other, and when the adjacent moving shelves 1 collide with each other, an impact force is received from the stacking direction of the shock absorbing material 16 and the rubber 17. It is like that.
[0017]
In the example shown in FIG. 1 and FIG. 2, the buffer member 15 is attached only to one of the opposing surfaces of the adjacent mobile shelves 1, and the rubber 17 of the buffer member 15 is the front surface of the side plate 2 of the adjacent mobile shelf. It comes to hit the side. At this time, the buffer material 16 softer than the rubber 17 is compressed and buffered, and then the rubber 17 is compressed and buffered. In this way, the cushioning material 16 that is buffered in stages and softer than the rubber 17 is laminated together with the rubber 17, so even if the adjacent movable shelves 1 collide with each other and a large impact force is applied, this is applied. It can buffer effectively. Therefore, even if the moving shelves collide with each other at a relatively high speed, the impact sound can be effectively reduced, and the stored articles can be prevented from falling or falling.
[0018]
As the material of the cushioning material 16, a rubber-like material mainly composed of silicon may be used. Such materials are extremely soft and sufficiently durable. Incidentally, the hardness of rubber is about 80 °, and the hardness of a rubber-like material mainly composed of silicon is about 10 °. The cushioning material 16 and the rubber 17 are formed in a columnar or disk shape, and the diameter φ1 of both the cushioning material 16 and the rubber 17 is about 19 mm. When the diameters of the cushioning material 16 and the rubber 17 are different, for example, when the diameter of the cushioning material 16 serving as the base is larger than the diameter of the rubber 17, the rubber 17 is harder than the cushioning material 16. When an impact force is applied to the cushioning material 16, the load is concentrated on only the portion of the cushioning material 16 where the rubber 17 abuts, and a part of the cushioning material 16 is deformed intensively, and the cushioning material 16 as a whole is biased. Therefore, the cushioning material 16 is quickly deteriorated. However, according to the illustrated embodiment, the shock absorber 16 and the rubber 17 have the same diameter. Therefore, when an impact force is applied to the rubber 17, the shock absorber 16 is uniformly compressed, and the deterioration of the shock absorber 16 is suppressed. Thus, the durability can be enhanced and the buffering effect can be enhanced.
[0019]
The thickness D1 of the cushioning material 16 is preferably about 5 to 20 mm.
In order to obtain a large cushioning effect, it is also conceivable that the entire cushioning member is composed of the cushioning material 16 without using the rubber 17. However, since the cushioning material 16 is softer than the rubber 17, the cushioning material 16 may cause an adsorption phenomenon when the movable shelf facing the cushioning member comes into surface contact or when the cushioning member of the facing movable shelf comes into surface contact. . When the adsorption phenomenon occurs, when the moving shelves facing each other are separated, a tensile force is generated in the buffer member, which may damage the buffer member. In that regard, according to the illustrated embodiment, the rubber 17 having a property of hardly causing the suction cup phenomenon is caused to collide with the opposing movable shelf or the buffer member by using a laminated body of the buffer material 16 and the rubber 17. Therefore, the adsorption phenomenon hardly occurs and the buffer member is not damaged.
[0020]
The details of the buffer member 20 attached to the frame 11 of the movable shelf 1 are shown in FIG. In FIG. 3, a buffer member 20 is attached to the front side of the frame 11. Like the buffer member 15, the buffer member 20 is composed of a laminate of a rubber 22 and a buffer material 21 softer than the rubber 22. The rubber 22 is fixed and integrated on the buffer material 21 as a base, and the buffer material 21 is fixed to the front side of the frame 11. Therefore, the shock absorbing material 21 and the rubber 22 are stacked and protruded toward the moving shelf 1 facing each other, and when the adjacent moving shelves 1 collide with each other, an impact force is received from the stacking direction of the shock absorbing material 21 and the rubber 22. It is like that.
[0021]
In the example shown in FIGS. 1 and 3, the buffer members 20 are attached to both of the opposing surfaces of the adjacent movable shelves 1, so that the rubbers 22 of both the buffer members 20 hit each other. At this time, the buffer material 21 softer than the rubber 22 is compressed and buffered, and then the rubber 22 is compressed and buffered. In this way, the buffer material 21 that is buffered in stages and softer than the rubber 22 is laminated together with the rubber 22, so that the adjacent movable shelves 1 collide with each other and are large like the above-described buffer member 15. Even if an impact force is applied, this can be effectively buffered. In addition, since the buffer members 20 of both the moving shelves 1 are in contact with each other and buffer, the buffering effect is further enhanced. Therefore, even if the moving shelves collide with each other at a relatively high speed, the impact sound can be effectively reduced, and the stored articles can be prevented from falling or falling.
[0022]
As the material of the cushioning material 21, like the cushioning material 16, a rubber-like material mainly composed of silicon may be used. The cushioning material 21 and the rubber 22 have a cylindrical shape, and both the cushioning material 21 and the rubber 22 have the same diameter φ2, and the diameter φ2 is about 35 mm. The reason and effect of making the diameters of the buffer material 21 and the rubber 22 the same are the same as the reason and effect described for the buffer member 15. The reason why the diameter φ2 of the cushioning material 21 is made larger than the diameter φ1 of the cushioning material 16 is that the impact force between the frames 11 of the adjacent movable shelves 1 is greater than the impact force at the top of the movable shelf 1. This is because a buffering effect larger than the buffering effect at the upper part of the moving shelf 1 is desired. This is also the reason why the buffer members 20 are attached to both the frames 11 of the adjacent movable shelves 1.
The thickness D2 of the buffer material 21 is preferably about 5 to 20 mm.
[0023]
As shown in FIG. 1, in a state where the shock absorbing members 20 attached to the frame 11 of the adjacent movable shelf 1 are in contact with each other, the front end surface of the shock absorbing member 15 attached to the upper portion of the movable shelf 1 and the other opposing surface. It is set so that a certain amount of gap is generated between the front surface of the movable shelf 1. With such a setting, when adjacent movable shelves 1 collide with each other, first, the buffer members 20 on the side of the frame 11 are compressed and buffered, and then the movable shelf on which the upper buffer member 15 is opposed. It abuts against the front face of 1 and is compressed and buffered. In this way, since the buffering is performed over two stages, a larger buffering effect can be obtained. In particular, even if the movable shelves 1 collide with each other at a high speed, the impact force and the noise at the time of the collision can be effectively reduced, and the stored articles can be prevented from falling or falling.
[0024]
In the embodiment described in FIGS. 1 to 3, the frame 11 of the movable shelf 1 is provided with the buffer members 20 on both opposing surfaces of the adjacent movable shelf 1. The buffer member 15 is attached only to one of the opposing surfaces of the moving shelves 1 adjacent to each other. However, it is arbitrary whether the buffer member 20 or the buffer member 15 is attached to both of the opposing surfaces of the adjacent moving shelves 1 or only to one of the opposing surfaces of the adjacent moving shelves 1.
[0025]
The buffer member has a higher buffering effect as the thickness of the buffer material combined with rubber increases. However, when the thickness of the cushioning material increases, when the opposing moving shelf collides, the cushioning material tends to tilt, and the rubber comes into contact with the opposing moving shelf at a point, not a surface, and the buffering effect is hindered. There can be. Therefore, the structure shown in FIG. 4 may be employed as the mounting structure of the buffer member. Although this example shows the mounting structure of the buffer member 15, a similar structure can be adopted for the buffer member 20.
[0026]
In short, the mounting structure shown in FIG. 4 forms a central hole through the cushioning member 16 and the rubber 17 of the cushioning member 15 made of a laminate of the cushioning material 16 and the rubber 17, and a bolt 18 is passed through the central hole. The bolt 18 further penetrates the side plate 2 of the movable shelf 1, and a nut is screwed into this, whereby the buffer member 15 is sandwiched between the head of the bolt 18 and the side plate 2. The rubber 17 is formed with a recess 171 in which the head of the bolt 18 can be sufficiently buried. The tightening force by the bolt 18 and the nut is such that the buffering effect of the buffer member 15 is not hindered. The buffer material 16 may be lightly tightened with a bolt 18 and a nut after being bonded to the side plate 2.
[0027]
According to the mounting structure of the buffer member shown in FIG. 4, when the moving shelf collides with the buffer member 15, the buffer material 16 and the rubber 17 contract using the bolt 18 as a guide. Even if the movable shelf collides with respect to the diagonal, the buffer member 15 does not incline, and the movable shelf comes into surface contact with the buffer member 15, and the desired buffer effect can be obtained.
[0028]
FIG. 5 shows the result of actual measurement of the noise level at the time of collision of the moving shelf using the buffer member having the specifications shown in FIGS. 1 to 4 and the conventional moving shelf using only rubber as the buffer member. The numerical values shown in FIG. 5 are values obtained by measuring with an indicating sound level meter defined in JIS C 1502. The “comparative example” is obtained by attaching a shock-absorbing member made only of rubber to an electric moving shelf manufactured by the applicant company. “The present invention” means that a shock-absorbing member having the specifications shown in FIGS. 1 to 4 is attached to the power assist type moving shelf manufactured by the applicant company in the form shown in FIGS. is there. The specifications of the movable shelf body are the same for both “Comparative Example” and “Invention”.
[0029]
In FIG. 5, “F”, “A”, and “C” indicate switching modes of the function switch of the sound level meter. “F” means flat and a physical measure of sound without frequency correction. The measured value when this “F” is set is called the sound pressure level. The “F” characteristic is used when performing frequency analysis. In the “F” characteristic, the noise frequency (Hz) was divided in stages from 63 to 8000 and measured in each frequency band. The amount of noise level audible to the human ear corresponds to the value measured with “A”. “A” or “C” means frequency correction. The noise level is always measured by the A characteristic according to JIS. Actually, it is desirable to measure with the C characteristic in addition to the A characteristic. It can be seen that when the difference between C and A is small, the frequency component of the noise has many high-frequency components, and when the difference between C and A is large, there are many low-frequency components.
[0030]
In the results shown in FIG. 5, when the comparative example and the present invention are compared, there is no significant difference in the low sound range, but according to the present invention, the noise reduction effect increases as the sound goes from the middle sound range to the high sound range. Recognize. For example, at a frequency of 2000 Hz, the sound pressure level is 66 (dB) in the comparative example, which is close to the noise in the soundproof train, whereas in the present invention, the noise level is reduced to an average office noise level at 50 (dB). is doing. The mid to high range noise is annoying to humans, but according to the present invention, the disturbing mid to high range noise is effectively reduced, and the noise reduction effect is great. Recognize. The noise level in the A characteristic is 74 (dB) in the comparative example, which is close to the noise in the downtown area in the daytime, whereas the noise level in the present invention is 52 (dB), which is reduced to the noise of an average office room. ing.
[0031]
Note that the contact acceleration when the movable shelves collide with each other was also measured. When the movable shelves collided at a predetermined speed, the contact acceleration was 320 gal in the comparative example, whereas it was 174 gal in the present invention, and it was confirmed that the impact force was improved by 46%.
[0032]
The type of the moving shelf to which the buffer member according to the present invention is applied is not limited to the electric moving shelf, but the moving shelf main body is pushed directly by human power, and the rotational force of the rotating operation handle by human power is transmitted through the speed reduction mechanism. The present invention can also be applied to a rotating operation handle type moving shelf that is transmitted to the traveling wheel and is driven to rotate, whereby the desired effect can be obtained. Moreover, since the buffer member concerning this invention has a high impact-force absorption effect and a noise reduction effect as already demonstrated, it is effective when applied to a moving shelf with a high moving speed.
[0033]
【The invention's effect】
According to the invention of claim 1, when an impact force is applied to the buffer member from the stacking direction by applying a buffer member made of a laminate of rubber and a buffer material softer than the rubber to the moving shelf, First, it is buffered by a cushioning material softer than rubber, and then buffered by rubber, so that a large buffering effect can be obtained. By using this as a buffering member for the moving shelf, when the moving shelves collide with each other Noise and shock can be effectively reduced.
[0034]
According to the second aspect of the present invention, when the movable shelf collides with the buffer member, the buffer material and the rubber contract using the bolt as a guide, so that the movable shelf collides obliquely with respect to the stacking direction of the buffer material and the rubber. Even if it does, a buffer member does not incline, a movable shelf contacts a buffer member, and the desired buffer effect can be acquired.
[0035]
In the invention according to claim 4 , when the movable shelves collide with each other, the impact member attached to the frame comes into contact first, and then the impact member attached to the upper part of the movable shelf comes into contact. When the shelves collide with each other, the impact member attached to the underframe first comes into contact, and then the impact member attached to the upper part of the moving shelf comes into contact and is buffered in two stages. Can be obtained.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a moving shelf using a buffer member according to the present invention.
FIG. 2 is a side view showing in detail a buffer member at the top of the moving shelf.
FIG. 3 is a side view showing in detail a buffer member attached to a frame of the moving shelf.
FIG. 4 is a side cross-sectional view showing an example of the mounting structure of the buffer member according to the present invention.
FIG. 5 is a chart showing the noise level at the time of collision of a moving shelf using a buffer member according to the present invention compared with the noise level of a moving shelf using a conventional buffer member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mobile shelf 2 Side plate 11 Base frame 15 Buffer member 16 Buffer member 17 Rubber 20 Buffer member 21 Buffer member 22 Rubber

Claims (4)

A plurality of movable shelves which are placed so as to be running on rails mounted in pairs facing surfaces you adjacent, a cushioning member for a movable rack to mitigate the impact force when the movable rack collide with each other,
It said buffer member, consist laminate of a rubber softer cushioning material than rubber,
The laminate is integrated with rubber fixed to the buffer material as a base,
The buffering member for a moving shelf, wherein the buffering member is fixed to the front surface of the moving shelf and receives an impact force from the stacking direction. The cushioning material and the rubber have a central hole penetrating them, and the cushioning member made of the cushioning material and rubber is fixed to the moving shelf by a bolt passed through the central hole, and when the movable shelf collides with the cushioning member, The shock absorber for a movable shelf according to claim 1, wherein the shock absorber and the rubber contract with a bolt as a guide . The cushioning material for a moving shelf according to claim 1 or 2, wherein the cushioning material is mainly composed of silicon, and the cushioning material and the rubber are cylindrical or disk-shaped with the same diameter, and the thickness of the cushioning material is 5 to 20 mm . The shock-absorbing member according to any one of claims 1 to 3 is attached to a surface opposite to a frame and an upper part of an adjacent movable shelf on the frame and the upper part of the movable shelf, and the movable shelf collides with each other. impact member attached to the frame contacts the first, then the movable rack you contact impact member mounted on top of the moving rack.

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