JP2016069131A - Attachment fitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment fitting device capable of freely attaching and detaching an attachment to be fitted to a fork with a simple configuration and simple operation.SOLUTION: An attachment fitting device fitted to a fork of a forklift comprises: a pair of holding members which comprises a hook part for locking a rear face of a vertical plate of a fork rear end from a side face by closing, and a push-in part extended from the hook part in an inside direction of the hook parts, and rotates in a direction of closing the hook part by pressing the push-in part against a front face of the vertical plate; a fixing mechanism for fixing the holding members when the hook part is closed; and an energizing mechanism for energizing the hook part in an opening direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an attachment mounting device for making an attachment added to a fork of a forklift detachable from the fork.

  Conventionally, a fork of a forklift is equipped with attachments such as a Saya fork that extends the length of the fork, a box pallet for inserting small parts, or a bucket, and these attachments are attached and detached as necessary. For the purpose of providing a Saya fork that can operate the stopper locking function without human intervention to improve this attachment / detachment work, Japanese Patent Application Laid-Open No. 2004-51354 discloses a fork at the rear end of the Saya fork. There is disclosed a Saya fork provided with locking means for locking a rising portion at the rear end of the fork when the fork is lifted in the inserted state.

  In addition, for the purpose of facilitating this attachment when attaching an attachment, Japanese Patent Application Laid-Open No. 2005-272034 discloses a shaft on the back side of a bucket having a fork claw insertion opening and a finger bar for a forklift. And a hydraulic cylinder for latching the latching body on the shaft, and when the fork claw is inserted into the fork claw insertion opening of the bucket, A forklift attachment mounting mechanism is disclosed in which a latching body is latched to a shaft provided in a bucket by a cylinder.

JP 2004-51354 A JP 2005-272034 A

  However, the technique disclosed in Patent Document 1 is configured such that the locking is released only when the sheath fork is placed on the ground or the like. For this reason, the sheath fork can be attached and detached only when the sheath fork is placed on the ground or the like. For example, there is a problem that the sheath fork cannot be used when the sheath fork is placed on a frame. Further, when the sheath fork is placed on the ground, there is a problem that the sheath fork may come off against the intention of the operator.

  Further, in the technique disclosed in Patent Document 2, a bucket or the like can be attached and detached as intended by the operator regardless of the condition for mounting the attachment, but a hydraulic cylinder for fixing the bucket Is required, the configuration becomes complicated, and the manufacturing cost may increase.

  The present invention has been made in view of the above points, and an object of the present invention is to provide an attachment mounting apparatus that can freely attach and detach an attachment to be mounted on a fork while having a simple configuration and simple operation. And

The attachment mounting device of the present invention is
An attachment mounting device for mounting on a fork of a forklift,
By providing a hook portion that locks the rear surface from the side surface of the vertical plate at the rear end of the fork, and a pressing portion that extends in the inner direction of the hook portion, the pressing portion is pressed against the front surface of the vertical plate, A pair of gripping members that rotate in a direction in which the hook portion is closed;
A fixing mechanism for fixing the gripping member when the hook portion is closed;
A biasing mechanism that biases the gripping member in a direction in which the hook portion is opened;
It is characterized by providing.

  According to the attachment mounting device of the present invention, when the pushing portion formed integrally with the hook portion is pushed on the front surface of the vertical plate at the rear end of the fork, the entire gripping member is rotated, and accordingly, the hook portion is The rear face is locked from the side face of the vertical plate at the rear end of the fork. For this reason, the operator of the forklift can mount the attachment mounting device on the fork while riding. At that time, since the pushing portion is on the front surface of the vertical plate, a pair of gripping members including the hook portion and the pushing portion surround the four sides of the vertical plate, and when the hook portion is closed, the gripping member Is fixed by a fixing mechanism. Thereby, an attachment can be firmly attached to a fork. Further, since the gripping member is biased in the direction in which the hook portion is opened by the biasing mechanism, the hook portion is always kept when the pushing portion is not pressed and when the gripping member is not fixed by the fixing mechanism. Will be opened. Thereby, the attachment mounting apparatus can be mounted on the vertical plate of the fork more easily.

A preferred example of the attachment mounting device of the present invention is:
The fixing mechanism is
When the hook portion is opened, it does not interfere with the movement of the gripping member by being placed on the gripping member, while when the hook portion is closed, it falls to the side of the gripping member and the gripping member A lock portion is provided that regulates the movement of the gripping member by abutting against the side surface.

  According to a preferred example of the attachment mounting device of the present invention, when the hook portion is closed, the lock portion falls to the side of the gripping member, and the movement of the gripping member is regulated and fixed by contacting the side surface of the gripping member. Therefore, the configuration can be simplified. Further, the hook portion is opened by the above-described urging mechanism only by lifting the lock portion from the fixed state, and the gripping member enters under the lock portion. Thereby, the lock portion does not fall until the hook portion is closed next time, and the gripping member is not fixed.

A preferred example of the attachment mounting device of the present invention is:
The tip of the hook part is provided below the pushing part.

  According to a preferred example of the attachment mounting device of the present invention, since the tip of the hook portion is provided below the push-in portion, the tip of the hook portion can lock the vicinity of the lower end of the vertical plate of the fork. . Thereby, a hook part does not interfere with the backrest, finger bar, etc. of a forklift.

A preferred example of the attachment mounting device of the present invention is:
One hook portion of the pair of gripping members is configured to be shorter than the other hook portion, and the one hook portion locks only a side surface of the vertical plate.

  According to a preferred example of the attachment mounting apparatus of the present invention, one hook portion is configured to be shorter than the other hook portion, and the one hook portion only locks the side surface of the vertical plate of the forklift, so that the backrest of the forklift Even if the finger bar or the like has a special shape, it becomes difficult to interfere.

  As described above, according to the attachment mounting device of the present invention, it is possible to mount the attachment to be mounted on the fork by a simple operation of pressing the vertical plate of the fork against the pushing portion of the gripping member with a simple configuration. it can. Further, when the gripping member is not fixed by the fixing mechanism, the hook portion is opened by the urging means, so that the attachment mounting device can be easily attached and detached.

  In addition, according to a preferred example of the attachment mounting device of the present invention, the fixing mechanism has a simple configuration, so that the cost can be further reduced and the fixing can be performed by a simple operation only of the operation of lifting the lock portion. It can be released, and the number of work steps can be reduced.

  Further, according to a preferred example of the attachment mounting device of the present invention, the hook portion does not interfere with the backrest, finger bar, etc. of the forklift, and therefore can be adapted to various types of forklifts.

  In addition, according to a preferable example of the attachment mounting device of the present invention, even if the backrest, finger bar, etc. of the forklift have a special shape, they are less likely to interfere with each other and can be easily handled. Can do.

It is a top view of the attachment mounting apparatus concerning one embodiment of the present invention. It is sectional drawing which cut | disconnected the attachment mounting apparatus of FIG. 1 by the AA line, and abbreviate | omitted one part. It is a front view of an attachment mounting apparatus. It is a top view explaining the state which opened the hook part of the attachment mounting apparatus. It is sectional drawing which cut | disconnected the attachment mounting apparatus of FIG. 4 by the AA line, and abbreviate | omitted one part. It is a top view of the attachment mounting apparatus which concerns on other embodiment of this invention. It is a figure explaining the state which mounted | wore the forklift with the Saya fork provided with the attachment mounting apparatus.

  Embodiments of an attachment mounting device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a plan view of an attachment mounting device 1 according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the attachment mounting device 1 of FIG. It is a front view of the attachment mounting apparatus 1. 4 is a plan view illustrating a state in which the hook portion 11 of the attachment mounting device 1 is opened, and FIG. 5 is a cross-sectional view in which the attachment mounting device 1 of FIG. It is. FIG. 6 is a plan view of an attachment mounting apparatus 100 according to another embodiment of the present invention. FIG. 7 is a view for explaining a state where the forklift 70 is mounted with the Saya fork 75 provided with the attachment mounting device 1. In these drawings, in order to make the configuration of the attachment mounting device 1 easy to understand, some members are shown through.

  First, a state where the attachment mounting device 1 of the present embodiment is mounted on the forklift 70 will be described with reference to FIG. The attachment mounting device 1 of the present embodiment is joined to the upper surface of the root of the Saya fork 75 by a known method such as welding or a bolt. When the fork 71 is inserted into the Saya fork 75, the attachment mounting device 1 is mounted and used on the vertical plate 72 that rises substantially vertically from the root of the fork 71. In addition, the attachment mounting apparatus 1 of this embodiment is not restricted to the illustrated Saya fork 75, It can be used for various attachments, such as attaching to a back surface, such as a box pallet and a bucket.

  Next, with reference to FIGS. 1-3, the structure of the attachment mounting apparatus 1 of this embodiment is demonstrated. In order to make the configuration of the attachment mounting device 1 easy to understand, the top plate 60, the engagement plate 33, and the handle 35 are shown in FIG. 1, the collar 23 and the guide 34 are shown in FIG. 2, and the collar 23 is shown in FIG. Yes. In FIG. 2, the urging mechanism 40 is omitted. Furthermore, in FIG. 1, the cross section of the vertical board 72 of the forklift 70 is described.

  As shown in FIGS. 1 to 3, the attachment mounting apparatus 1 of the present embodiment includes a pair of gripping members 10, a rotating shaft 20, a fixing mechanism 30, an urging mechanism 40, a base 50, and a top plate. 60 and a housing 62.

  The gripping member 10 is a plate material having a substantially T-shape in plan view that includes a hook portion 11 and a pushing portion 12. The hook portion 11 is made of an elongated plate material, bent downward in a substantially Z shape, has a hook-shaped tip, and is disposed so that the hook-shaped tips face each other. Since the hook portion 11 is bent downward in a substantially Z shape, the tip end of the hook portion 11 is disposed below the pushing portion 12, and the tip end of the hook portion 11 is the lower end portion of the vertical plate 72 of the fork 71. Locked in the vicinity. Thereby, it can prevent that the hook part 11 interferes with the backrest 73 and the finger bar 74 of the forklift 70 (refer FIG. 7). In addition, the bending method of the hook part 11 is not restricted to Z bending of this embodiment, Various shapes can be employ | adopted. Further, it is preferable that the position of the tip of the hook portion 11 does not interfere with the backrest 73 and finger bar 74 of the forklift 70 and does not protrude downward from the lower end of the vertical plate 72 of the fork 71. .

  The push-in portion 12 is a plate-like member that extends from the side surface in the length direction of the hook portion 11 toward the inside of the hook portion 11, and is configured integrally with the hook portion 11. A projection 13 is provided on the front side surface of the end of the push-in portion 12 so as to make it easy to contact the vertical plate 72 of the fork 71.

  The rotating shaft 20 includes a known bolt 21, washer 22, collar 23, and the like. The tip of the screw portion is screwed to the base 50 and the root of the screw portion is screwed to the top plate 60 and the like. Then, the gripping member 10 can turn freely by penetrating the vicinity of the coupling portion between the hook portion 11 and the pushing portion 12 of the gripping member 10 between the base 50 and the top plate 60 of the rotating shaft 20. It is pivotally supported. Further, the holding member 10 is held so that the upper and lower portions thereof are not moved up and down by the two collars 23. In the attachment mounting device 1 of the present embodiment, the rotation shaft 20 is provided vertically and the gripping member 10 is configured to rotate in the horizontal direction. However, depending on the shape of the attachment or the forklift 70, etc. The moving shaft 20 may be provided to be inclined, and the gripping member 10 may be configured to rotate in an oblique direction.

  The fixing mechanism 30 includes a lock portion 31, an engagement plate 33, a guide 34, and a handle 35. The lock portion 31 is a plate material that has a substantially rectangular shape when viewed from the front. The upper portions of the left and right ends of the lock portion 31 are curved to match the diameter of the handle 35 in order to attach the handle 35. Further, an engagement hole 32 for loosely fitting the engagement plate 33 is provided in the vicinity of the central portion in a horizontally long rectangular shape. Further, the lower part of the lock part 31 is in contact with the rear side surface of the hook part 11 of the gripping member 10 so that the rotation of the gripping member 10 can be restricted.

  The engagement plate 33 is a plate material having a substantially rectangular shape in plan view that is screwed together with the top plate 60 by the rotary shaft 20 onto the top surface of the top plate 60. Then, the vicinity of the rear end portion is loosely fitted into the engagement hole 32 of the lock portion 31 so that the lock portion 31 can be moved up and down by the vertical dimension of the engagement hole 32 and the lock portion 31 is dropped. Is preventing.

  The guide 34 is a pair of plates that are erected in the vicinity of the rear end of the base 50 so that the flat surface thereof faces in the left-right direction. And the front-end part of the guide 34 is adjoining to the back surface of a lock plate, the lower part of a lock plate is controlled to move back, and it prevents that a lock plate inclines in the front-back direction. An urging mechanism 40 is close to the front surface of the lock plate, and the urging mechanism 40 also prevents the lock plate from being inclined.

  The handle 35 is formed by bending a round bar into a substantially left U shape when viewed from the front, and two leg portions are bent at the upper left and right ends of the lock portion 31 by a known method such as welding. Be joined. And the handle | steering-wheel 35 can be lifted by operation of an operator.

  The urging mechanism 40 includes a vertical substrate 41, a support shaft 42, an elastic body 45, a push plate 46, and a front support plate 47. The vertical substrate 41 is a plate material erected from the base 50 with its flat surface facing in the front-rear direction, and the support shaft 42 is screwed together and close to the front surface of the lock plate. Inclination is prevented.

  The support shaft 42 includes a known bolt 43, washer 44, and the like. The tip of the screw portion is screwed to the vertical substrate 41 from the front to the rear, and the root of the screw portion is screwed to the front support plate 47. Is done. Then, the support shaft 42 is fixed in the space above the base 50 so that the axial direction is along the front-rear direction of the attachment mounting device 1.

  The elastic body 45 is a coil spring 45 wound around the support shaft 42. One end is in contact with the vertical substrate 41, and the other end is in contact with the pressing plate 46, and the pressing plate 46 is urged forward by its elastic force. In addition, in the attachment mounting apparatus 1 of this embodiment, although the coil spring 45 is used as the elastic body 45, it is not limited to this, It is provided between a cylindrical rubber bush, the vertical board | substrate 41, and the press plate 46. Alternative means such as a provided leaf spring may be used.

  The push plate 46 is a plate material having a substantially right U shape in a plan view, and the opening side thereof is directed rearward, and the opposite side is in contact with the gripping member 10. And the through-hole for penetrating the support shaft 42 is provided in the approximate center of the flat surface. The through hole is configured to have a size capable of loosely fitting the support shaft 42, and the push plate 46 can move in the axial direction of the support shaft 42. Further, the push plate 46 is urged forward by the elastic force of the coil spring 45 that is constantly applied from the rear, and always pushes the rear side surface of the pushing portion 12 of the gripping member 10 forward. On the other hand, the pressing plate 46 may be pushed backward by a force applied to the pushing portion 12. FIG. 1 shows a state in which the pressing plate 46 is pushed most backward by the pressing portion 12, and both end portions on the opening side of the pressing plate 46 are in contact with the front surface of the vertical substrate 41, and more It is in a state where it does not move backward.

  The front support plate 47 is formed by bending a part of the front end of the top plate 60 downward, and the root of the screw portion of the support shaft 42 is screwed into a hole provided on the front plate. The screw head of the shaft 42 protrudes. The front support plate 47 and the support shaft 42 are joined by providing a hole having a diameter larger than that of the support shaft 42 in the front support plate 47 and screwing a nut (not shown) to the support shaft 42. The front support plate 47 may be sandwiched between the head and the support shaft 42 may be passed through a hole provided in the front support plate 47.

  The base 50 is for fixing main components of the attachment mounting device 1 of the present embodiment, and is a plate material having a horizontally long and substantially rectangular shape in plan view. A rotating shaft 20 is fixed to the left and right in the vicinity of the front end by being screwed in the vertical direction. In addition, a vertical substrate 41 is fixed and erected in the middle and slightly rearward by a known method such as welding, bolting, and fitting. Further, a pair of guides 34 are fixed and erected on the rear side of the left and right ends of the vertical substrate 41 by a known method such as welding, bolting, and fitting.

  The top plate 60 is a substantially rectangular plate material that is horizontally long in plan view and covers the upper surface of the attachment mounting device 1 of the present embodiment, and is screwed together with the engagement plate 33 in the vicinity of the head of the rotating shaft 20. In addition, a front support plate 47 is configured by bending a part of the plate downward in the center of the left and right of the front end. Further, a laterally long hole 61 for allowing the lock portion 31 to pass therethrough is provided slightly in the center. The top plate 60 and the engagement plate 33 are joined to the rotation shaft 20 by providing a hole larger than the rotation shaft 20 in the top plate 60 and the engagement plate 33 and penetrating the rotation shaft 20. The top plate 60 and the engagement plate 33 may be sandwiched between the nut and the head of the rotary shaft 20.

  The housing 62 is a box-shaped member made of a plate material that covers the back surface, the right side surface, the left side surface, and the bottom surface of the attachment mounting device 1 of the present embodiment, and is joined and fixed to the base 50 with a bolt or a bracket (not shown). The Further, the housing 62 can be provided with a screw hole, a bolt or the like for attaching the attachment. The housing 62 may be configured to be split.

  Next, based on the form and function of each component described above, the operation of the attachment mounting device 1 of the present embodiment will be described with reference to FIGS. For easy understanding of the configuration and operation of the attachment mounting apparatus 1, FIG. 4 shows the top plate 60, the engagement plate 33, and the handle 35, and FIG. 5 shows the collar 23 and the guide 34 transparently. In FIG. 5, the urging mechanism 40 is not shown. Furthermore, in FIG. 4, the cross section of the vertical board 72 of the forklift 70 is described.

  First, as shown in FIGS. 1 to 3, in the attachment mounting device 1 according to the present embodiment, the gripping member 10 rotates inward, that is, the hook portion 11 is closed, and the hook portion 11 is closed. At this time, the pressing plate 46 is pushed forward by the elastic body 45 of the urging mechanism 40, and pressing the pushing portion 12 of the holding member 10 with the pushing plate 46 causes a force to the holding member 10 in the direction of opening the hook portion 11. It has been added. However, in this state, the lock portion 31 of the fixing mechanism 30 has dropped to the side of the gripping member 10, and the lock portion 31 abuts on the side surface of the gripping member 10, in this embodiment, the rear side surface of the hook portion 11. The movement of the gripping member 10 to turn is restricted. For this reason, the hook part 11 does not open.

  Next, as shown in FIGS. 4 and 5, when the handle 35 of the fixing mechanism 30 is pulled up, the lock portion 31 is also raised at the same time. Then, the lower end of the lock part 31 is lifted above the rear side surface of the hook part 11, and the fixation of the gripping member 10 by the lock part 31 is released. Next, when the gripping member 10 biased by the biasing mechanism 40 rotates in the direction in which the hook portion 11 opens, the rear end portion of the hook portion 11 enters under the lock portion 31, and the hand is moved from the handle 35. Even if it is released, the lock portion 31 is only placed on the gripping member 10. As a result, even if the gripping member 10 is rotated, the upper surface near the rear end of the hook portion 11 is slid at the lower end of the lock portion 31 and the movement of the gripping member 10 is not hindered.

  In this state, as shown in FIG. 7, when the fork 71 of the forklift 70 is inserted into an attachment such as a Saya fork 75 to which the attachment mounting apparatus 1 of the present embodiment is attached, the pushing portion 12 of the gripping member 10 is moved to the fork 71. Is pressed against the vertical plate 72. And the holding member 10 rotates by the pushing part 12 being pushed by the force pressed against the vertical board 72, and the hook part 11 is closed simultaneously. Next, when the hook portion 11 is closed, as shown in FIGS. 1 to 3, the rear end portion of the hook portion 11 located below the lock portion 31 disappears, and the lock portion 31 falls. The movement of the gripping member 10 to turn is restricted by the lock portion 31 coming into contact with the rear side surface of the hook portion 11.

  Accordingly, the attachment mounting device 1 is mounted so as to surround the four sides of the vertical plate 72 of the fork 71 by the pushing portions 12 and the hook portions 11 of the pair of gripping members 10. In addition, in the attachment mounting apparatus 1 of this embodiment, although the lock | rock part 31 becomes a structure which falls with dead weight, you may provide separately the spring mechanism etc. which urge | bias downward so that it may fall easily.

  Next, an attachment mounting apparatus 100 as another embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to drawing and the description is abbreviate | omitted about the location with the same structure as the attachment mounting apparatus 1 of the above-mentioned embodiment. Further, in order to make the configuration of the attachment mounting apparatus 100 easy to understand, the top plate 60, the engagement plate 33, and the handle 35 are shown in a transparent manner, and a cross section of the vertical plate 72 of the forklift 70 is shown.

  In the attachment mounting apparatus 100 shown in FIG. 6, one hook portion 11 a of the pair of gripping members 10 and 10 a is configured to be shorter than the other hook portion 11. When the forklift 70 is attached to the vertical plate 72, the one short hook portion 11a does not reach the back surface of the vertical plate 72, and only the side surface is locked. For this reason, even if it is the forklift 70 provided with the backrest 73 and the finger bar 74 of a special shape, or even if the fork 71 is moved to the end of the finger bar 74, one hook part 11a is It does not interfere with the finger bar 74 and is easy to mount. In addition, the attachment mounting apparatus 100 of this embodiment can avoid the backrest 73 and the finger bar 74 more effectively by using what was made symmetrical as a pair.

  As described above, according to the attachment mounting device of the embodiment of the present invention, when mounting on the vertical plate of the fork, the fork lift fork is inserted into the attachment while riding on the fork lift, and the pressing portion is simply pressed with the vertical plate of the fork. Can be installed. Further, when removing the attachment mounting device from the vertical plate of the fork, the hook part can be opened and the fixation with the vertical plate can be released only by lifting the handle of the fixing mechanism. Thus, the attachment mounting device can be easily attached to and detached from the forklift with a simple operation.

  In addition, since the gripping member is a plate material having a substantially T-shape in plan view and the fixing mechanism is dropped, the configuration of the attachment mounting device can be simplified, and the manufacturing cost can be reduced. be able to.

  Moreover, the hook part is provided below the pushing part, and the front-end | tip of a hook part is latched by the lower end vicinity of the vertical board of a fork. As a result, the backrest and finger bar of the forklift and the attachment mounting device do not interfere with each other, and can be mounted on various types of forklifts. In addition, since the hook portion does not protrude below the lower end of the vertical plate of the fork, it can be handled in either a state where the attachment is placed on a pedestal or the like, or a state where the attachment is placed on the floor or the ground.

  Moreover, in the structure which shortened one hook part, it can mount | wear with the forklift of various shapes, or an attachment.

  In addition, the attachment mounting apparatus mentioned above is an illustration of this invention, and can change the structure suitably in the range which does not deviate from the meaning of invention.

1,100 .. Attachment mounting device 10, 10a .. Grip member, 11, 11a .. Hook portion, 12 .. Pushing portion, 13.
20 .. Rotating shaft, 21 .. bolt, 22 .. washer, 23 .. collar,
30 .. Fixing mechanism, 31... Locking part, 32 .. Engagement hole, 33 .. Engagement plate, 34.
40 .. Energizing mechanism, 41 .. Vertical substrate, 42 .. Support shaft, 43 .. Bolt, 44 .. Washer, 45 .. Elastic body (coil spring), 46 .. Push plate, 47. Plate 50 ・ ・ Base, 51 ・ ・ Guide part,
60 ··· Top plate, 61 · · Horizontal hole, 62 · · Housing
70 ... Forklift, 71 ... Fork, 72 ... Vertical plate, 73 ... Backrest, 74 ... Finger bar, 75 ... Saya fork,

Claims (4)

An attachment mounting device for mounting on a fork of a forklift,
By providing a hook portion that locks the rear surface from the side surface of the vertical plate at the rear end of the fork, and a pressing portion that extends in the inner direction of the hook portion, the pressing portion is pressed against the front surface of the vertical plate, A pair of gripping members that rotate in a direction in which the hook portion is closed;
A fixing mechanism for fixing the gripping member when the hook portion is closed;
A biasing mechanism that biases the gripping member in a direction in which the hook portion is opened;
An attachment mounting device comprising: The fixing mechanism is
When the hook portion is opened, it does not interfere with the movement of the gripping member by being placed on the gripping member, while when the hook portion is closed, it falls to the side of the gripping member and the gripping member The attachment mounting device according to claim 1, further comprising: a lock portion that regulates movement of the gripping member by contacting the side surface of the attachment member.   The attachment mounting device according to claim 1, wherein a tip end of the hook portion is provided below the pushing portion.   4. One of the hook members of the pair of gripping members is configured to be shorter than the other hook portion, and the one hook portion locks only the side surface of the vertical plate. The attachment mounting device according to item.

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