WO2019043944A1

WO2019043944A1 - Pedal device, pedal device unit, stand, and electronic keyboard

Info

Publication number: WO2019043944A1
Application number: PCT/JP2017/031785
Authority: WO
Inventors: 啓三照井; 靖井上
Original assignee: ヤマハ株式会社
Priority date: 2017-09-04
Filing date: 2017-09-04
Publication date: 2019-03-07

Abstract

Disclosed is a pedal device comprising: a pedal; a casing that covers a portion of the pedal; a first support column and a second support column that are attached to the casing and disposed in a first direction; and a first protective plate and a second protective plate that are attached to the first support column and the second support column. The first support column and the second support column each comprise a first through hole and a second through hole. In both the first support column and the second support column, the length of the first through hole and the length of the second through hole in the first direction are both greater than the length of the first through hole and the length of the second through hole in a second direction perpendicular to the first direction. The first protective plate and the second protective plate each have a length that covers the first through hole and the second through hole, and each comprise a first opening and a second opening that can simultaneously align with the opening position of the first through hole and the second through hole, respectively.

Description

Pedal device, pedal device unit, stand, and electronic keyboard instrument

The present invention relates to a pedal device, a pedal device unit including a pedal device, a stand including a pedal device, and an electronic keyboard instrument including a stand and a keyboard instrument supported thereon.

One of the most widely used electronic musical instruments is the electronic keyboard instrument. A keyboard composed of a plurality of keys is disposed on the electronic keyboard instrument. The electronic keyboard instrument further has a pedal for changing the attenuation behavior of the sound, the timbre, and the volume as an optional configuration. The pedals are usually located below the electronic keyboard instrument body and operated by the user's foot. Therefore, structures have been proposed for adjusting or fixing the position and height of the pedal so as to be suitable for the shape of the user (see Patent Documents 1 to 3).

Japanese Patent Application Laid-Open No. 2002-323887 JP 2005-70565 A Japanese Utility Model Publication No. 58-62394

An object of one of the embodiments of the present invention is to provide a pedal device capable of easily and stably fixing a pedal on a floor surface.

One embodiment of the present invention is a pedal, a housing covering a part of the pedal, a first support post and a second support attached to the housing and installed in a first direction, and a first support And a second protection plate attached to the second support post. Each of the first support and the second support has a first through hole and a second through hole. In each of the first support and the second support, the lengths of the first through holes in the first direction and the lengths of the second through holes are the first in the second direction perpendicular to the first direction. And the length of the second through hole. The first protective plate and the second protective plate both have the lengths covering the first through hole and the second through hole, and align the opening positions simultaneously with the first through hole and the second through hole, respectively. Can have a first opening and a second opening.

The diameters of the first opening and the second opening may be 90% or more and 110% or less of the length in the second direction of the first through hole or the second through hole, respectively.

The pedal system can further have a base below the pedal and a stopper below the base. The stopper can include a resin. The stopper may also have a plurality of ridges perpendicular to the longitudinal direction of the pedal.

One embodiment of the present invention is a pedal device unit further comprising a heel having the above-mentioned pedal device and a mechanism for fixing the first support and the second support.

The pedal device is configured to be connectable to a keyboard instrument, and the length of the hook corresponds to the number of keys of the keyboard instrument.

The mechanism provided in the crucible may include a plurality of screw holes adapted to screws passing through the first through hole and the second through hole, and the first and second openings of the protective plate The spacing is equal to the spacing of the plurality of screw holes.

One embodiment of the present invention is a stand having a pair of side plates, a pair of side plates connected to each other, and the above-mentioned pedal device attached to a pair of side plates.

One embodiment of the present invention is an electronic keyboard device having a keyboard instrument, the above stand, and the above pedal device.

According to the embodiment of the present invention, for example, when the electronic keyboard instrument is installed on the stand, the pedal can be easily and stably fixed on the floor surface.

FIG. 1 is a schematic perspective view of an electronic keyboard instrument according to an embodiment of the present invention. FIG. 1 is a schematic perspective view of an electronic keyboard instrument according to an embodiment of the present invention. The typical rear view of the pedal apparatus concerning one of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic top view of a pedal device according to one embodiment of the present invention. The typical side view of the pedal device concerning one of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The typical bottom view of the pedal apparatus which concerns on one of embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The typical perspective view of the pedal apparatus which concerns on one of embodiment of this invention. The typical rear view of the pedal apparatus concerning one of the embodiments of the present invention. The schematic diagram of the cut surface of the pedal apparatus which concerns on one of embodiment of this invention. The schematic diagram of the cut surface of the pedal apparatus which concerns on one of embodiment of this invention. The typical rear view of the stand concerning one of the embodiments of the present invention. The typical rear view of the stand concerning one of the embodiments of the present invention. The typical rear view of the stand concerning one of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The typical bottom view of the pedal apparatus which concerns on one of embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The typical bottom view of the pedal apparatus which concerns on one of embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The typical bottom view of the pedal apparatus which concerns on one of embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Typical sectional drawing of the pedal apparatus which concerns on one of embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings and the like. However, the present invention can be implemented in various modes without departing from the scope of the present invention, and the present invention is not interpreted as being limited to the description of the embodiments exemplified below.

Although the drawings may be schematically represented with respect to the width, thickness, shape, etc. of each part in comparison with the actual embodiment in order to clarify the explanation, the drawings are merely an example, and the interpretation of the present invention is limited. It is not something to do. In the present specification and the drawings, elements having the same functions as those described with reference to the drawings in the drawings may be denoted by the same reference numerals, and overlapping descriptions may be omitted.

In the present specification, when each component of a configuration including a plurality of components is referred to in a discriminatory manner, a lower case alphabet may be used after the symbol of the configuration. In the case where one or a plurality of arbitrarily selected components or all of them are described without distinguishing each of the plurality of components, only the code is used.

1. Overall Configuration FIGS. 1 and 2 show a schematic perspective view of a pedal device, a stand including the pedal device, and an electronic keyboard instrument 140 having a keyboard instrument 142 according to an embodiment of the present invention. FIG. 1 is a perspective view of the keyboard instrument 142 as viewed from the back, and FIG. 2 is a perspective view of the keyboard instrument 142 as viewed from the front. Hereinafter, each of these embodiments will be described in detail.

2. Pedal device 2-1. Configuration FIGS. 3A, 3B, 4A, and 4B show a schematic rear view, a top view, a side view, and a bottom view of the pedal device 100, respectively. As shown in these figures, the pedal device 100 has a pedal 102, a housing 104 covering a part of the pedal 102, and a pedestal (hereinafter referred to as a base) 116 located below the pedal 102 and the housing 104. . A part of the pedal 102 is exposed from the housing 104. The other part of the pedal 102 is located between the housing 104 and the base 116, fixed by a mechanism not shown, and configured to be able to rotate the pedal 102 about a pedal rotation axis located below the housing 104. Ru. In these figures, an example in which the pedal system 100 has three pedals (the pedal 102a, the pedal 102b, and the pedal 102c) is shown, and in this case, the

pedals

102a, 102b and 102c are soft pedals, sostenuto pedals and dampers, respectively. It can be configured to act as a pedal. However, the number of pedals 102 is not limited to three, and may be one, two or four or more. When there are four pedals 102, one may function as a switch for changing the sound waveform, for example.

The base 116 is located on the floor surface side not shown and can be in contact with the floor surface. The frictional force generated by the base 116 coming into contact with the floor contributes as one of the forces to prevent the housing 104 and the base 116 from moving even when the user operates the pedal, and therefore the user feels uncomfortable. Therefore, the pedal system 100 can be operated.

The pedal device 100 further includes a housing 104 or two columns (first column 106a, second column 106b) 106 extending in a direction (vertical direction or first direction) perpendicular to the floor surface (see FIG. 3A, FIG. 3B, see FIG. 4A). The support 106 includes a metal such as iron or aluminum or an alloy such as stainless steel. As shown in FIG. 5, the post 106 has a hollow structure and is detachable from the housing 104. For this reason, a guide 105 is provided on the top surface of the housing 104 so as to be inserted into the column 106 and to support the column 106. A plurality of screw holes 105a are formed in the guide 105, and the post 106 is fixed using a screw (not shown). Thereby, the housing 104 and the support 106 are firmly fixed, and the long axis of the support 106 maintains the vertical direction.

As an optional configuration, the pedal device 100 may further include a shock absorbing material 114 on top of the first support 106 a and the second support 106 b. The buffer material 114 is provided to prevent interference between the keyboard instrument 142 and the pedal device 100 or damage to the keyboard instrument 142 even if the keyboard instrument 142 and the support 106 are in contact, for example, when the keyboard instrument 142 is installed. Therefore, the buffer material 114 has elasticity and can include, for example, a resin such as butadiene-styrene copolymer or silicone rubber, or a polymer foam such as polyurethane or chloroprene.

2-2. Through Holes The first support column 106a and the second support column 106b each have two through holes (a first through hole 108a, a second through hole 108b) 108 (FIG. 3A). The first through holes 108 a and the second through holes 108 b are provided to be arranged in the vertical direction in the respective columns 106. These through holes 108 pass through the support column 106, and are formed so that the cylindrical portion 124a and the screw portion 124b of the fixing screw 124 can pass and the head 124c can not pass, as described later. At least one through hole 108 may be provided in each support column 106, and each support column 106 may have three or more through holes 108. In FIG. 3A, the through holes 108 of the first support 106 a are not shown because they overlap with a protective plate 110 described later.

As shown in FIG. 3A, each of the first through hole 108a and the second through hole 108b provided in the support column 106 has a longitudinally long shape. More specifically, the vertical length (hereinafter simply referred to as a length) L _th of the through holes 108 is the length in a second direction (hereinafter horizontal direction) perpendicular to the first direction. Hereinafter, simply referred to as a width) larger than W _th . For example, the length L _th is twice or more and ten times or less, two times or more and five times or less, or three times or more and four times or less the width W _th . Specifically, the length L _th is 2 cm or more and 10 cm or less, 2 cm or more and 8 cm or less, or 2 cm or more and 3 cm or less. Specifically, the width W _th is 5 mm or more and 2 cm or less, 5 mm or more and 1.5 cm or less, and 5 mm or more and 1 cm or less. The length L _th is larger than the diameter of the screw portion 124 b of the fixing screw 124 described later, the cylindrical portion 124 a, and the head portion 124 c. On the other hand, the width W _th is larger than the diameters of the screw portion 124 b of the fixing screw 124 and the cylindrical portion 124 a and smaller than the diameter of the head 124 c.

2-3. Protective Plate As shown in FIGS. 3A and 4A, the pedal device 100 can further include a protective plate 110. The protective plate 110 is installed on one surface of the first support 106 a and the second support 106 b, that is, on the surface of the support 106 opposite to the side where the pedal 102 protrudes from the housing 104. be able to. Although FIG. 3A illustrates only the protective plate 110 (the first protective plate 110a) provided on the surface of the first support 106a, for the sake of easy viewing, the second support 106b has the surface on the surface thereof. A second protective plate 110b is provided (see FIG. 4A).

The protective plate 110 may include, for example, polyester such as polyethylene terephthalate, polycarbonate, acrylic resin, polypropylene, polymer material such as polylactic acid, or metal such as aluminum, iron, copper or an alloy thereof. The protective plate 110 may have flexibility. When a polymeric material is used, the protective plate 110 may use a material that can transmit visible light.

As illustrated in the enlarged view of the area shown by the dotted line in FIG. 3A (FIG. 6A), the size of the protective plate 110 is designed to cover the first through holes 108a and the second through holes 108b. Be done. Specifically, the length (that is, the width) W _pr of the horizontal direction (hereinafter, simply referred to as the horizontal direction) parallel to the surface of the support 106 on which the protective plate 110 is provided is the horizontal length (that is, the length Although the width) or less, the first through-hole 108a, is larger than the width W _th of a second through hole 108b. The length _Lpr is the distance D from the end of the first through hole 108a opposite to the second through hole 108b to the end of the second through hole 108b opposite to the first through hole 108a. Greater than ₁

Each protective plate 110 is further provided with two openings (a first opening 112 a, a second opening 112 b) 112. These openings 112 penetrate the protective plate 110. The first opening 112a and the second opening 112b are formed to align (overlap) with the first through hole 108a and the second through hole 108b, respectively. Therefore, the distance between the two openings 112 is the distance from the end on the second through hole 108 b side of the first through hole 108 a to the end on the first through hole 108 a side of the second through hole 108 b D greater than _2, the distance D smaller than _1, preferably equal to the pitch of the through hole 108. The number of openings 112 provided in each protective plate 110 is not limited to two, and may correspond to the number of through holes 108 formed in the corresponding support column 106.

The openings 112 are preferably circular or substantially circular. In this case, the diameter D _op is smaller than the length L _th of the through hole 108. The diameter D _op is equal to the width W _th or in the range of 90% to 110% of the width W _th and is larger than the diameter of the screw portion 124 b of the fixing screw 124 and the cylindrical portion 124 a described later. Less than the diameter of

6B and 6C show schematic views of the cross section along the chain line AA 'and BB' in FIG. 6A. The post 106 is fixed to a screw hole 138 provided in the weir 134 using a washer 122 and a fixing screw 124 as described later. Therefore, the width W _th and the diameter D _op are selected such that the screw portion 124 b and the cylindrical portion 124 a of the fixing screw 124 can pass through, and the head portion 124 c can not pass through. For this reason, as shown in FIG. 6B, the fixing screw 124 almost completely closes the through hole 108 and the opening 112 in the direction of AA ′. However, the through hole 108 has a length L _th greater than the width W _th . For this reason, as shown in FIG. 6C, the fixing screw 124 does not completely close the through hole 108 in the direction of B-B ', and the fixing screw 124 and the end of the through hole 108 (dotted oval in FIG. 6C). There is a gap between the enclosed area).

However, since the pedal device 100 can include the protective plate 110 having the above-described structure, the gap can be almost completely covered by installing the protective plate 110. Therefore, it is possible to prevent the entry of fingers from this gap or the infiltration of dust.

3. Stand and Electronic Keyboard Instrument As shown in FIGS. 1 and 2, the stand 130 has a pair of side plates (a first side plate 132a, a second side plate 132b) 132, and a hook 134 connecting the side plates 132. There is no limitation on the fixing method of the side plate 132 and the collar 134, and any method such as a screw alone or a combination of an L-shaped angle and a screw as shown in FIG. 1 can be adopted. The keyboard instrument 142 is supported by the stand 130. While the distance between the side plates 132 is determined by the weir 134, mechanical strength for supporting the keyboard instrument 142 is given to the stand 130, and further, a mechanism for fixing the pedal device 100 is provided. In other words, the weir 134 has both the function of producing mechanical strength as the stand 130 and the function of fixing the pedal device 100. The length of the weir 134, ie, the distance between the side plates 132, corresponds to the length of the keyboard instrument 142, ie, the number of keys.

In the present specification and claims, the stand 130 includes the pair of side plates 132 and the weir 134 and may further include the pedal device 100 described above. In addition, the electronic keyboard instrument 140 includes a stand 130 and a keyboard instrument 142 supported by the stand 130, and the pedal system 100 is electrically connected to the keyboard instrument 142 through the cable 118. In addition, the pedal apparatus 100 connected to the heel 134 and the heel 134 is generally called a pedal apparatus unit. A well-known keyboard instrument can be used as the keyboard instrument 142, so it will not be described in detail in this specification.

The connection of the heel 134 and the pedal device 100 is shown in FIGS. 7A and 7B. FIG. 7A and FIG. 7B are rear views of the chopsticks 134 and the pedal device 100, and show a state when the keyboard instrument 142 is viewed from the back. In FIG. 7B, a portion of the second protective plate 110b is not shown for easy viewing.

As shown in FIG. 7A, the hook 134 is provided with a screw hole 138 adapted to the fixing screw 124 as a mechanism for fixing the pedal device 100 to the hook 134, and further, an opening corresponding to the screw hole 138 is formed. The metal plate 136 is placed. The metal plate 136 is fixed to the weir 134 by means of screws 126. Therefore, the pedal device 100 is detachable with respect to the heel 134. The number of metal plates 136 provided in one weir 134 is not limited to four, and may be the same as the total number of through holes 108 of two columns 106. When two through holes 108 are provided in each support column 106 as shown in FIG. 3A, a total of four metal plates 136 (first metal plate 136a to fourth metal plate 136d) are provided as shown in FIG. 7A. Be In the example shown here, the first metal plate 136a and the second metal plate 136b are arranged in the vertical direction, and correspond to the through hole 108 of the first support column 106a and the opening 112 of the first protective plate 110a. Similarly, the third metal plate 136c and the fourth metal plate 136d are arranged in the vertical direction, and correspond to the through holes 108 of the second support column 106b and the openings 112 of the second protection plate 110b. The distance between the screw holes 138 of the two vertically adjacent metal plates 136 is equal to the distance between the two adjacent openings 112 provided in the protective plate 110.

When fixing the pedal device 100 to the heel 134, as shown in FIG. 7B, the fixing screw 124 is inserted into the through hole 108 of the support 106 and the opening 112 of the protective plate 110, and the fixing screw 124 is screwed into the screw hole 138. As described above, the length L _th of the through hole 108 is larger than the width W _th . Therefore, the pedal device 100 can be fixed to the weir 134 at an arbitrary position in the vertical direction within the range of the length L _th of the through hole 108. For example, even when the distance L1 from the floor surface 120 to the keyboard instrument 142 is increased to the distance L2, the fixing screw 124 is penetrated into the through hole 108 at a position higher than the through hole 108 and then screwed into the screw hole 138 , The pedal device 100 can be fixed to the hook 134 (see FIG. 8). Therefore, when the pedal device 100 is fixed, the pedal device 100 is installed such that the base 116 contacts the floor surface 120 using the weight of the pedal device 100 itself, and then the fixing screw 124 is tightened. Can be fixed to the weir 134 and can be stably fixed on the floor surface 120. In other words, when the pedal system 100 is installed, the height of the pedal system 100 is automatically determined simply by placing the pedal system 100 on the floor surface 120. In this state, the support screw 106 is used to support the support 106. The pedal device 100 is stably fixed on the floor surface 120 by fixing the 框 134. Therefore, even if the floor surface 120 is not flat but uneven, the pedal device 100 can be stably fixed on the floor surface 120 and the pedal 102 can be adjusted to the optimum position. As a result, it is possible to realize a pedal operation without a sense of discomfort.

Furthermore, by using the protective plate 110, the fixing screw 124 can be tightened into the screw hole 138 more accurately. More specifically, for example, the fixing screw 124 is inserted into the first through hole 108a of the first support column 106a via the first opening 112a of the first protective plate 110a, and the fixing screw 124 is When inserted into the screw holes 138 of the metal plate 136 a, the distance between the screw holes 138 of the two vertically adjacent metal plates 136 (for example, the first metal plate 136 a and the second metal plate 136 b) The second opening 112b not only overlaps with the second through hole 108b but also its position coincides with the position of the screw hole 138 of the second metal plate 136b because it is equal to the distance between the two adjacent openings 112. Therefore, the position of the fixing screw 124 to be inserted into the screw hole 138 of the second metal plate 136b is uniquely determined, and the direction of the fixing screw 124 is oblique due to the length L _th of the second through hole 108b. It is possible to suppress the problem of being inserted into the screw hole 138 from the above, and to enable accurate screwing.

Some conventional electronic keyboard instruments have a pedal apparatus integrally incorporated in a pair of side plates connected to give mechanical strength to the stand. In this case, if the width of the keyboard instrument 142 is different due to the difference in the number of keys, the side plates can be used in common, and although it can be managed with only one part number, a plurality of chopsticks with different lengths integrated with the pedal device It was necessary to prepare the kind. In this case, part number control is performed for each rod having a different length, and a plurality of part number controls are also required for the integrally incorporated pedal device. However, as described above, in the electronic keyboard instrument 140 according to the present embodiment, the function to create mechanical strength as the stand 130 and the function to fix the pedal device 100 are realized by one wedge 134, and the pedal device 100 is removable from the collar 134. Therefore, the width of the keyboard instrument 142 does not affect the design of the pedal device 100, and the same pedal device 100 can be commonly used regardless of the width of the keyboard instrument 142. As a result, part number control of the pedal device is only one part number. Similarly, a pedal system unit can be provided simply by combining a pedal system that can be managed with one part number with a wedge 134 having a length corresponding to the number of keys. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced. Further, when the pedal device 100 is additionally added to the keyboard instrument 142, it is not necessary to newly attach a hook to the stand 130, and it is sufficient to attach only the pedal device 100 smaller in volume than the hook to the stand. Therefore, the burden on costs and logistics is reduced.

Furthermore, in the conventional electronic keyboard instrument, the vertical position of the pedal 102 is adjusted using a rotary screw type adjuster provided below the base 116 after the electronic keyboard instrument 140 is installed. Therefore, the adjustment operation itself is complicated. However, in the electronic keyboard instrument 140 of the present embodiment, the position of the pedal 102 is automatically determined when the electronic keyboard instrument 140 is assembled, so the height of the pedal 102 can be easily adjusted.

5. Base As described above, the pedal apparatus mechanically fixes the support post 106 and the weir 134 using the fixing screw 124, thereby fixing the position of the pedal 102 on the floor surface 120. However, since the strength of the support 106 is also limited, when the pedal 102 is operated with a strong force, the support 106 is bent and the position of the pedal 102 is changed.

A stopper 150 may be provided on the bottom surface of the base 116 in order to prevent such positional change of the pedal 102. For example, as shown in FIG. 9A, the stopper 150 can be provided on all or part of the bottom surface of the base 116. As the stopper 150, rubber having elasticity such as silicone rubber, styrene-butadiene rubber, polyisoprene rubber, acrylonitrile-butadiene rubber, urethane rubber, fluororubber, etc. can be used.

The shape of the stopper 150 is not limited to a quadrangle as shown in FIG. 9A, and as shown in FIG. 9B, it may be polygonal or may have various shapes such as a circle or an ellipse although not shown. Further, the number of stoppers 150 is not limited, and a plurality of stoppers 150 can be provided on the bottom surface of the base 116 as shown in FIG. 9B.

Moreover, the surface shape of the stopper 150 can also be designed arbitrarily, and asperities may be provided on the surface. For example, as shown in FIG. 10A and its cross-sectional view (FIG. 10B), a plurality of ridges 152 may be provided on the surface of the stopper 150. In the example shown in FIGS. 10A and 10B, the plurality of ridges 152 all extend in a direction perpendicular to the longitudinal direction of the pedal 102. Although not shown, the shape of the ridges 152 is not limited to this, and some ridges 152 may extend in a direction perpendicular to the longitudinal direction of the pedal 102, and some ridges 152 may be inclined from this direction. Also, one ridge 152 may be configured by a plurality of straight lines or curves.

By providing the stopper 150 as described above, the friction between the base 116 and the floor surface 120 is increased, and the change of the position during the operation of the pedal 102 can be suppressed, and the pedal operation without discomfort can be realized. Be done.

Those skilled in the art appropriately add, delete, or change design of components based on the configuration described as the embodiment of the present invention, or add, omit, or change conditions of processes are also the present invention. It is included in the scope of the present invention as long as it has the gist of

Further, although the electronic keyboard instrument has been described in the above-described embodiment, the instrument is not limited to this, and an electronic string instrument using a pedal may be used.

Even if other actions and effects different from the actions and effects provided by the aspects of the embodiment described above are apparent from the description of the present specification or those that can be easily predicted by those skilled in the art, it is a matter of course that It is understood to be provided by the invention.

100: Pedal device 102: Pedal 102a: Pedal 102b: Pedal 102c: Pedal 104: Housing 105: Guide 105a: Screw hole 106: Support post 106a: First support 106b: Second The pillars 108: through holes 108a: first through holes 108b: second through holes 110: protective plate 110a: first protective plate 110b: second protective plate 112: opening 112a The first opening 112b: the second opening 114: shock absorbing material 116: base 118: cable 120: floor surface 122: washer 124: fixing screw 124a: cylindrical portion 124b: screw portion 124c: head, 130: stand, 132: side plate, 132a: first side plate, 132b: second side plate, 134: weir, 136: metal plate, 136a: first metal plate, 36b: second metal plate, 136c: third metal plate, 136d: fourth metal plate, 138: screw hole, 140: electronic keyboard instrument, 142: keyboard instrument, 150: stopper, 152: ridge, 154: Convex part

Claims

With the pedal,
A housing covering a part of the pedal;
First and second posts attached to the housing and installed in a first direction;
And a first protection plate and a second protection plate attached to the first support post and the second support post,
Each of the first support and the second support has a first through hole and a second through hole,
In each of the first support and the second support, the length of the first through hole in the first direction and the length of the second through hole are perpendicular to the first direction. Greater than the length of the first through hole and the length of the second through hole in the two directions;
The first protective plate and the second protective plate are both
A length covering the first through hole and the second through hole, and a first opening and a second opening position which can be simultaneously aligned with the first through hole and the second through hole, respectively. Pedal device having an opening.
The diameter of each of the first opening and the second opening is 90% or more and 110% or less of the length of the first through hole or the second through hole in the second direction. The pedal apparatus of claim 1.
A base under the pedal,
The pedal apparatus according to claim 1, further comprising a stopper below the base.
The pedal device according to claim 3, wherein the stopper includes a resin and has a plurality of ridges perpendicular to the longitudinal direction of the pedal.
A pedal system unit further comprising: a pedal system according to claim 1; and a scissors having a mechanism for fixing the first column and the second column.
The pedal device is configured to be connectable to a keyboard instrument.
The pedal system unit according to claim 5, wherein the length of the hook corresponds to the number of keys of the keyboard instrument.
The mechanism includes a plurality of screw holes adapted to screws passing through the first through hole and the second through hole,
The pedal system unit according to claim 5, wherein a distance between the first opening and the second opening is equal to a distance between the plurality of screw holes.
A pair of side plates,
A weir connecting the pair of side plates;
A stand having the pedal apparatus according to claim 1 attached to the heel.
Keyboard instrument,
An electronic keyboard device comprising the stand according to claim 8 and the pedal device according to claim 1.