JP2022175325A - pallet lift - Google Patents

Abstract

To provide a pallet lift in which a pallet can be widely applied, which can lift the pallet with the pallet lift itself, and which can move with the pallet lifted.SOLUTION: A pallet lift A comprises a pallet supporting member 1, an expansion/contraction driving member, caster members 20, parallel link members 30, and cam members 40, where the pallet supporting member arranged along a side girder P1 of a pallet P and expanding/contracting along the girder P1, the expansion/contraction driving member to expand/contract the pallet supporting member 1, the caster member provided to be adjacent to both ends 3, 13 of the pallet supporting member 1 and with running wheels 29, the parallel link member to connect the ends 3, 13 of the pallet supporting member 1 and the caster members 20, and to raise/lower the pallet supporting member 1, and the cam member attached to the lower link arm of the parallel link member 30 and having a clamping surface to be in contact with or separated from an outer end face P2 of the side girder P1 of the pallet P.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a pallet lift that can be directly attached to a physical distribution pallet without using a forklift and can move cargo only with the pallet.

In a manufacturing factory, a pallet P is used to carry loads N such as parts, semi-finished products, and finished products and transport them to the next process. The pallet P carrying these cargoes N is carried to a predetermined location by a forklift. The empty pallet P is then collected and returned to its original location. In this way, a forklift is indispensable for transporting the load N using the pallet P, and transporting the load N using the pallet alone is impossible. However, the pallets P on which the goods N are placed are stored side by side in a warehouse, for example. In this case, it was necessary to move the front pallet P to another location and create a passage for the forklift to enter to that position, which took a long time.

Therefore, a pallet lift 100 that is directly attached to the pallet P without using a forklift and is moved only by the pallet P has been proposed (Patent Document 1).
The pallet lift 100 is composed of a pallet support member 110 and traveling wheels 120. The pallet support member 110 consists of the ends of two inner girders p20 made of rectangular lumber that are passed back and forth inside the pallet P, By sandwiching edge boards p30 at the front end and the rear end stretched at right angles to this, the traveling wheels 120 are detachably attached to four locations on the front, back, left and right of the pallet P, and the traveling wheels 120 are rotatable 360 degrees on the lower surface of the pallet support member 110. pivoted. The pallet P to which the pallet lift 100 configured as described above is attached can be moved by itself in a loaded state through a narrow passage in a place where the pallet P is stored without a forklift.

Japanese Utility Model Publication No. 03-019837

However, this pallet lift 100 is not structured to lift the pallet P by itself. However, if the cargo N is on it, it must be lifted by some method (for example, a jack) and a gap for mounting must be created between the pallet P and the floor surface G, and mounting it is troublesome. rice field. The pallet P is made of wood or resin, and there are various types such as a two-way insert into which a fork can be inserted from two directions and a four-way insert into which a fork can be inserted from four directions. There are various sizes, such as one having one inner girder p20 made of vertical frame square timbers as shown in FIG. 18, and two as shown in FIG.
Since the conventional pallet lift 100 must be mounted on the inner girder p20 as shown in FIG. Pallet P was limited.

The present invention was made in view of the problems of the conventional pallet lift. To provide a pallet lift capable of moving in any state.

The pallet lift A (Embodiment 1: FIGS. 1 to 9) described in claim 1 is
A pallet support member 1 comprising a support body 2 arranged along a girder p1 on the side surface of a pallet P and a slide member 12 provided so as to be inserted into and removed from the support body 2 in a horizontal direction. ,
an expansion/contraction drive member 15 mounted on the slide member 12 for moving the support body 2 in the insertion/removal direction;
Caster members 20 provided adjacent to both ends 3 and 13 of the pallet support member 1 and provided with traveling wheels 29;
a parallel link member 30 that connects the ends 3 and 13 of the pallet support member 1 and the caster member 20, respectively, and moves the pallet support member 1 up and down with respect to the caster member 20;
and a cam member 40 that is attached to one of the link arms 35 (31) of the parallel link members 30 and has a clamping surface 45 that contacts and separates from the outer end surface p2 of the girder p1 on the side surface of the pallet P. ,
The lower end of the link arm 35 (31) to which the cam member 40 is attached is pivoted to the ends 3 and 13 of the pallet support member 1 so as to be vertically rotatable. The attachment portion S is formed so as to be positioned below a contact point Q1 (force point described later) of the cam member 40 against the outer end surface p2 of the girder p1 on the side surface of the pallet P.

The pallet lift B described in claim 2 (embodiment 2: FIGS. 10 and 11) is
A pallet support member 1 comprising a support body 2 arranged along a girder p1 on the side surface of a pallet P and a slide member 12 provided so as to be inserted into and removed from the support body 2 in a horizontal direction. ,
an expansion/contraction drive member 15 mounted on the slide member 12 for moving the support body 2 in the insertion/removal direction;
Caster members 20 provided adjacent to both ends 3 and 13 of the pallet support member 1 and provided with traveling wheels 29;
a parallel link member 30 that connects the ends 3 and 13 of the pallet support member 1 and the caster member 20, respectively, and moves the pallet support member 1 up and down with respect to the caster member 20;
A pad member 41 that is attached to one of the link arms 35 (31) of the parallel link members 30 and has a holding surface 45 that is entirely in contact with and separates from the outer end surface p2 of the girder p1 on the side surface of the pallet P. configured,
The link arm 35 (31) to which the pad member 41 is attached extends obliquely upward from the end on the side of the pallet support member 1 toward the outer end surface p2 of the girder p1 on the side surface of the pallet P. Equipped with a pad arm 37,
The pad arm 37 has a pad pivot hole 37a for pivoting the pad member 41 in a vertically swingable manner,
The portion of the link arm 35 (31) from which the pad arm 37 extends is pivotally attached to each of the ends 3 and 13 of the pallet support member 1 so as to be vertically rotatable. is formed so as to be located below a pad pivot hole 37a of the pad arm 37 (power point Q2 to be described later).

The pallet lift C (embodiment 3; FIGS. 12 to 14) according to claim 3 is
It comprises a support body 2 arranged along the outer side surface of the block p4 provided at the four corners of the pallet P, and a slide member 12 provided so as to be horizontally inserted into and removed from the support body 2. a pallet support member 1;
an expansion/contraction driving member 15 mounted on the slide member 12 for moving the support body 2 in the insertion/removal direction; a caster member 20 provided with running wheels 29;
a parallel link member 30 that connects the end portion 13 of the slide member 12 and the caster member 20 and moves the pallet support member 1 up and down with respect to the caster member 20;
a cam member 40 that is attached to one of the link arms 35 (31) of the parallel link members 30 and has a clamping surface 45 that contacts and separates from the outer end surface p5 of the block p4 of the pallet P;
It is attached to the support portion main body 2 and comes into contact with and separates from the inner end surface p6 of the block p4 on the opposite side of the outer end surface p5 on the cam member 40 side. It is composed of a sandwiching receiving member 50 that sandwiches the
The lower end of the link arm 35 (31) to which the cam member 40 is attached is pivoted to the ends 3 and 13 of the pallet support member 1 so as to be vertically rotatable. The attachment portion S is formed so as to be positioned below a contact point Q1 (force point described later) of the cam member 40 against the outer end surface p2 of the girder p1 on the side surface of the pallet P.

The pallet lift D (embodiment 4: FIG. 15) described in claim 4 is
It comprises a support body 2 arranged along the outer side surface of the block p4 provided at the four corners of the pallet P, and a slide member 12 provided so as to be horizontally inserted into and removed from the support body 2. a pallet support member 1;
an expansion/contraction drive member 15 mounted on the slide member 12 for moving the support body 2 in the insertion/removal direction;
a caster member 20 provided adjacent to the end portion 13 of the slide member 12 located outside the block p4 and having a running wheel 29;
a parallel link member 30 that connects the end portion 13 located outside the block p4 and the caster member 20 and moves the pallet support member 1 up and down with respect to the caster member 20;
a pad member 41 that is attached to one of the link arms 35 (31) of the parallel link members 30 and has a holding surface 45 that is entirely in contact with and separates from the outer end surface p5 of the block p4 of the pallet P;
The inner and outer end faces p5 and p6 of the block p4 are attached to the supporting portion main body 2, and the entire surface thereof contacts and separates from the inner end face p6 of the block p4 located on the opposite side of the outer end face p5. It is composed of a sandwiching receiving member 51 that sandwiches the
The link arm 35 (31) to which the pad member 41 is attached extends obliquely upward from the end on the side of the slide member 12 toward the outer end face p5 of the block p4 of the pallet P. 37,
The pad arm 37 has a pad pivot hole 37a for pivoting the pad member 41 in a vertically swingable manner,
The portion of the link arm 35 (31) from which the pad arm 37 extends is pivotally attached to the end portion 13 of the slide member 12 so as to be vertically rotatable. S is formed so as to be located below a pad pivot hole 37a (force point Q2 described later) of the pad arm 37. As shown in FIG.

Claim 5 is the pallet lift A to D according to any one of claims 1 to 4,
The expansion/contraction driving member 15 is rotatably mounted on the slide member 12 in a horizontal direction, and is screwed into the screw member 16 so as to be rotatable and attached to the support body 2 . It is characterized by being composed of a nut member 18 that is attached.

Claim 6 is the pallet lift C according to claim 3,
A pinching surface 55 of the pinching member 50 is characterized by being formed in a convex circular arc shape so as to make point contact with the end surface p5 on the pinching member 50 side.

Claim 7 is the pallet lift D according to claim 4,
The clamping receiving member 51 is pivotally mounted on a spacer 58 attached to the supporting portion main body 2 so as to be vertically swingable, and includes a receiving side pad member 52 whose entire surface is in contact with the inner end surface p6 of the block p4. It is characterized by

According to Embodiment 1 or 2 of the present invention, the pallet lifts A and B are installed along the girders p1 on both sides of the pallet P, and when the telescopic drive member 15 is operated in that state, the cam member 40 or the pad The member 41 lifts the pallet P while holding it therebetween. When the pallet P is lifted from the floor surface G and pulled, the pallet P is freely moved by the traveling wheels 29. - 特許庁It should be noted that the pallet lifts A and B of the first and second embodiments can be used in two or four directions if the pallet P has an outer end surface p2 at which the cam member 40 or the pad member 41 can come into contact at the four corners. Even if there is, it can correspond, and it can correspond even if the girders P20 inside the pallet P are one or two.

Further, according to Embodiment 3 or 4, when the pallet lifts C and D are installed along the blocks p4 at the four corners of the pallet P and the telescopic drive member 15 is operated, the cam member 40 or the pad member 41 is clamped and received. In cooperation with the members 50 and 51, the pallet P can be similarly lifted and moved freely. In this case, any size pallet P having blocks p4 at the four corners can be handled.

It is a top view which shows the mounting state of the pallet lift which is 1st Embodiment of this invention. 1. It is an XX front arrow view of the state before lifting the pallet of FIG. 1. It is a front arrow XX view of the state when the pallet of FIG. 1 is lifted. FIG. 2 is an enlarged plan view with partial omission of the pallet lift of FIG. 1; FIG. 5 is a front view of FIG. 4; (a) is a left side view of FIG. 5, and (b) is a cross-sectional view taken along line YY of FIG. FIG. 2 is an exploded perspective view of FIG. 1; FIG. 3 is a partially enlarged view of FIG. 2 before the lift; 4 is a partial enlarged view of the lifted state of FIG. 3; FIG. It is a partial plan view of the second embodiment. 11 is a front view of FIG. 10; FIG. It is a top view which shows the mounting|wearing state of the pallet lift which is 3rd Embodiment. 13 is a front view of the state before the pallet of FIG. 12 is lifted; FIG. FIG. 14 is a partially enlarged view of FIG. 13; It is the elements on larger scale of 4th Embodiment. FIG. 11 is a perspective view for explaining a use state of a conventional example; FIG. 17 is a perspective view of the conventional pallet lift of FIG. 16; FIG. 2 is a perspective view of a two-way pallet; FIG. 4 is a perspective view of a four-way pallet;

The present invention will be described below with reference to the drawings. There are four types of pallet lifts A to D of the present invention. Embodiments (FIGS. 1 to 11), and those individually arranged in blocks p4 at the four corners of the pallet P for use are third and fourth embodiments (FIGS. 12 to 15). In the first and third embodiments, a cam member 40 is used as a member for clamping and lifting the pallet P, and in the second and fourth embodiments, a pad member 41 is used.
In explaining the pallet lifts A to D of the present invention, the first embodiment will be sequentially explained, but in the explanation of the second embodiment and subsequent embodiments, the explanations of the parts that overlap with the first embodiment will be omitted in principle. , and the overlapping portions are basically used in the description of the second and subsequent embodiments with reference to the description of the first embodiment.

A pallet P to which the pallet lifts A to D of the present invention are applied is used in physical distribution as a loading platform on which cargo N is placed. In addition to the most typical flat pallet, there are many other types such as box pallets and sheet pallets. A pallet P to which the pallet lifts A to D of the present invention are applied is mainly a flat pallet having no upper structure and having an insertion port for a fork of a forklift. Of course, it is not limited to flat pallets. Most of the pallets P are made of wood, but some are made of synthetic resin.
The structure of the pallet P to which the pallet lifts A to D of the present invention are applied is, as shown in FIG. A board p30 and a deck board p31 are stretched, and as shown in FIG. There are also those on which edge boards p30 and deck boards p31 are stretched.

The pallet lift A of the first embodiment is composed of a pallet support member 1 , an expansion/contraction drive member 15 , caster members 20 , parallel link members 30 and cam members 40 . The pallet lifts A are arranged over the entire length along the girders p1 on both sides of the pallet P, lift the pallet P while holding the outer ends p2 of the girders p1 on both sides of the pallet P from both sides, and move in that state. You can do it.

The pallet support member 1 is a member arranged along the girders p1 on both side surfaces of the pallet P as described above, and caster members 20 are provided adjacent to both ends 3 and 13 thereof. The pallet support member 1 is composed of two members, a support body 2 and a slide member 12 .
The support body 2 is a rectangular tubular member having a vertically elongated rectangular cavity over the entire length in the longitudinal direction. It is designed to be The other end portion 3 is an end portion to which one caster member 20 is attached. Stepped upper and lower pins 60 and 70, which will be described later, are pivotally attached to the upper and lower portions of the end portion 3 on the caster member 20 side. A body-side upper pivot hole 4a and a body-side lower pivot hole 4b are formed (FIG. 7). The body-side upper pivot hole 4a and the body-side lower pivot hole 4b are formed on a vertical line perpendicular to the longitudinal direction of the support body 2. As shown in FIG. Round holes 6 for fixing nut members 18, which will be described later, are formed in the insertion side end portion 5 vertically and horizontally. The total length of the support body 2 is shorter than the length of the side beam p1 of the pallet P.

The slide member 12 is a member that can be inserted into and removed from the insertion side end portion 5 of the support portion main body 2, and has a U-shaped cross-section with a width and height that can be inserted into and removed from the opening of the insertion side end portion 5. A main body 12a, a screw fixing plate 12b provided at the insertion end of the insertion/removal member main body 12a for fixing a screw receiving member 16d at the insertion end of a screw member 16, which will be described later, and an end portion 13 on the opposite side of the insertion end. , a holding block 14 that rotatably holds an expansion/contraction driving member 15, and a rectangular tubular member 19 that surrounds the holding block 14 via an insertion/removal member main body 12a. Since it is sufficient for the screw receiving member 16d to rotatably hold the insertion end of the screw member 16, a washer fixed to the screw fixing plate 12b and the insertion end of the screw member 16 are inserted into the washer so as to be rotatable. It is composed of a fitted stepped cylindrical member.
The holding block 14 is divided into upper and lower halves, and a rotation holding hole 14h for rotatably supporting the neck portion 16b of the screw member 16 is formed in the joining portion of the upper and lower blocks 14U and 14D.
The square tube member 19 is a tube having a short front-rear length and a long vertical direction, into which the insertion/removal member main body 12a is inserted. (Fig. 6(b)).

The expansion/contraction driving member 15 is composed of the screw member 16 and the nut member 18 .
The screw member 16 is composed of the neck portion 16b, the head portion 16a, and the screw portion 16c. The screw member 16 is prevented from dropping out of the hole. The head 16a is formed, for example, in a hexagonal shape so that an electric box wrench can be attached.
The screw portion 16c has a male thread formed on its outer periphery over its entire length, and its insertion end is attached to the screw fixing plate 12b of the slide member 12 via a screw receiving member 16d.
A nut member 18 attached to the support body 2 is screwed into the threaded portion 16c so as to be threadable. The nut member 18 is movably arranged inside the insertion/removal member main body 12a having the U-shaped cross section.

The caster member 20 is composed of a traveling wheel 29 and a pedestal 21 that supports the traveling wheel 29 and to which the upper end of the parallel link member 30 is pivotally attached. The pedestal 21 is composed of a horizontal plate 22 and a vertical plate 23 erected vertically at the center of the upper surface thereof. Pedestal-side pivot holes 23a and 23b to which the upper ends of the parallel link members 30 are pivoted are formed above and below the vertical plate 23. As shown in FIG. The pedestal-side pivot holes 23a and 23b are provided on a vertical line erected on the horizontal plate 22, and are spaced apart from the upper and lower pivot holes 14a and 14b of the holding block 14 and the end portion 3 of the support body 2. It is equal to the distance between the upper and lower pivot holes 4a and 4b.

The parallel link members 30 are a pair of upper and lower flat plate members (in this embodiment, the same flat plate members are also provided on the left and right sides). An upper link arm 31 is provided on the upper side, and a lower link arm 35 is provided on the lower side.
The link arms 31 and 35 are formed with round holes for pivoting at their upper, intermediate and lower ends. The round hole at the upper end of the upper link arm 31 is the upper link first pivot hole 31a, the round hole at the lower end is the upper link second pivot hole 31b, and the round hole at the upper end of the lower link arm 35 is the lower link. The first pivot hole 35a and the round hole at the lower end are the lower link second pivot hole 35b. The round holes in the intermediate portions are referred to as an upper link intermediate round hole 31c and a lower link intermediate round hole 35c, respectively.

The cam member 40 is a fan-shaped member, and its convex circular arc portion is a clamping surface 45, and triangular unevenness is formed over the entire length in the width direction. Round holes are formed in the main portion and the portion near the holding surface 45 . A circular hole 40c for fixing the key portion is used, and a round hole near the clamping surface 45 is used as a fulcrum hole 40b. In this embodiment, two left and right cam members 40 are used side by side. In this embodiment, the radius R from the center of the fulcrum hole 40b to the clamping surface 45 is shorter than the radius R1 of the clamping surface 45, which is closer to the fulcrum hole 40b and farther. In other words, the radius R gradually increases with increasing distance from the fulcrum hole 40b (Fig. 7).

The cam member 40 and the parallel link member 30 installed in the front and rear are attached to the end 13 of the slide member 12 and the end 3 of the support body 2 by stepped upper and lower pins 60 and 70, respectively. .
The upper stepped pin 60 has a large-diameter portion 61 equal to the thickness of the vertical plate 23 of the base 21, a link-side shaft portion 63 protruding from one side surface of the large-diameter portion 61, and a member-side shaft portion 63 protruding from the other side surface. Equipped with a shaft portion 65, the stepped lower pin 70 includes a large-diameter portion 71 with a narrow width, a link-side shaft portion 73 protruding from one side surface of the large-diameter portion 71, and a member-side shaft portion protruding from the other side surface. A portion 75 is provided (FIG. 7).

As can be seen from FIG. 7, the link arms 31 and 35 connect the ends 3 and 13 of the pallet support member 1, that is, the end 3 of the support body 2 and the end 13 of the slide member 12 and the front and rear caster members 20 vertically. It is a member which connects the plate 23, respectively.
The mounting structure of the upper end portions of the link arms 31 and 35 to the vertical plate 23 and the mounting structure of the cam member 40 to the link arms 31 and 35, which will be described later, are symmetrical in the front-rear direction on the side of the support body 2 and on the side of the slide member 12. but the structure is the same. However, the attachment structure of the lower end portions of the link arms 31 and 35 on the side of the support portion main body 2 and the attachment structure on the side of the slide member 12 are slightly different.
First, the mounting structure of the link arms 31 and 35 on the side of the slide member 12 will be described.

The attachment structure between the upper end portions of the link arms 31 and 35 and the vertical plate 23 on the side of the slide member 12 and the connection structure between the lower end portions of the link arms 31 and 35 and the end portion 13 of the slide member 12 will be described below.
The upper end portions of the pair of left and right upper link arms 31 are arranged so as to sandwich the upper end portion of the vertical plate 23 of the pedestal 21 from both sides. 23 is pivoted by a bolt to a pedestal-side pivot hole 23a at the upper end of 23 so as to be swingable.
The upper end portions of the pair of left and right lower link arms 35 are arranged so as to sandwich the lower end portion of the vertical plate 23 of the pedestal 21 from both sides. The vertical plate 23 is pivoted to the pedestal-side pivot hole 23b at the lower end of the vertical plate 23 with a bolt so as to be swingable.

The lower end portions of the pair of left and right upper link arms 31 are arranged so as to sandwich a spacer ring 68 having a thickness equal to the thickness of the vertical plate 23 of the pedestal 21 from both sides. , upper link second pivot holes 31 b of both upper link arms 31 and the spacer ring 68 . The end surface of the large-diameter portion 61 of the stepped upper pin 60 contacts the side surface of the upper link arm 31 on the side of the slide member 12, and the end surface of the large-width large-diameter portion 61 and the nut hold them together. tighten the nut. This nut is tightened so that the upper link second pivot hole 31 b swings and rotates around the link side shaft portion 63 .
The member-side shaft portion 65 of the stepped upper pin 60 extending on the opposite side of the link-side shaft portion 63 is inserted into the inner and outer upper pivot holes 19a of the rectangular tubular member 19, the upper pivot hole 14a of the holding block 14, and the insertion/removal of the upper pivot hole 14a. It is inserted so as to pass through the through hole of the member main body 12a and bolted through a washer (FIG. 6(b)).

The lower end portions of the pair of left and right lower link arms 35 are arranged so as to sandwich one cam member 40 having a thickness equal to the thickness of the vertical plate 23 of the pedestal 21 from both sides. The other cam member 40 is arranged on the lower end side surface of the arm 35 . That is, the lower ends of the pair of left and right lower link arms 35, 35 and the two left and right cam members 40, 40 are alternately arranged (Fig. 6(b)).

Then, the link-side shaft portion 73 of the stepped lower pin 70 is inserted so as to pass through the lower link second pivot hole 35b of both lower link arms 35 and the fulcrum hole 40b of both cam members 40. The end surface of the narrow large-diameter portion 71 of the attached lower pin 70 contacts the side surface of the cam member 40 on the side of the slide member 12, and the end surface and the nut are tightened. The nuts are tightened so that both lower link arms 35 and both cam members 40 swing and rotate vertically around the link-side shaft portion 73 . The link-side shaft portion 73 of the stepped lower pin 70 serves as a fulcrum S of the swinging rotation of the cam member 40, as will be described later.

The member-side shaft portion 75 of the stepped lower pin 70 extending on the opposite side of the link-side shaft portion 73 is inserted into the inner and outer lower pivot holes 19b of the square tubular member 19, the lower pivot hole 14b of the holding block 14, and the insert. It is inserted so as to pass through the through hole of the removal member main body 12a and bolted through a washer (FIG. 6(b)). That is, on the slide member 12 side, the stepped lower pin 70 serving as the fulcrum S of the cam member 40 has, on the link side shaft portion 73, the lower link second pivot holes 35b of both the lower link arms 35, both The fulcrum hole 40b of the cam member 40 is attached, and in the member-side shaft portion 75, the inner and outer lower pivot mounting holes 19b of the square tube member 19, the lower pivot mounting hole 14b of the holding block 14, and the insertion/removal member main body 12a through-holes. is attached.

Both cam members 40 may be attached to any of the upper and lower link arms 31 and 35 as long as the following conditions are satisfied. When the cam member 40 is attached to the upper link arm 31, the upper and lower stepped pins 60 and 70 are installed upside down.
When the cam member 40 is attached to the lower link arm 35 as described above, the fixing round hole 40c of the cam member 40 and the lower link intermediate round hole 35c of both lower link arms 35 are bolted, and both cams are fixed. The member 40 is integrally fixed at two points to the lower link middle round hole 35c of both lower link arms 35 and the lower link second pivot hole 35b.

On the support body 2 side, the connection structure between both link arms 35 and both cam members 40, the connection structure between both link arms 35 and the vertical plate 23 of the caster member 20, both the link arms 35 and the stepped upper and lower pins 60.・The connection structure of 70 is the same as above, but the member side shaft portions 65 and 75 of the stepped upper and lower pins 60 and 70 are connected to the body side upper and lower portions provided at the end portion 3 of the support portion body 2. They are simply bolted to the lower pivot holes 4a and 4b via washers. The stepped lower pin 70 also serves as the fulcrum S of the cam member 40 on the support body 2 side.

Next, how to use the pallet lift A will be described. As shown in FIG. 1, a pallet lift A is arranged along the side girder p1 of the pallet P. As shown in FIG. In this state, the pallet P is placed on the floor G in a loaded state (Fig. 2). At this point, the nipping surface 45 of the cam member 40 of the pallet lift A is separated from the outer end surface p2 of the pallet P girder p1.
In this state, the electric box wrench is attached to the head portion 16a of the screw member 16, and the electric box wrench is rotated. As a result, the screw member 16 rotates, and the support body 2 is drawn toward the head portion 16a via the nut member 18 screwed onto the screw portion 16c. Then, the holding surface 45 of the cam member 40 contacts the outer end surface p2 of the girder p1 on the side surface of the pallet P at the contact point Q1.

When the electric box wrench is further operated from this state, the support body 2 is further drawn toward the head 16a, and the outer end face p2 of the pallet P presses the cam member 40 horizontally at the contact point Q1.
At this time, as shown in FIG. 8, a horizontal pressing force F is generated against the cam member 40 at the contact point Q1. Assuming that the contact point Q1 is the "force point" where the pressing force F is applied, the stepped lower pin 70 inserted through the fulcrum hole 40b of the cam member 40 becomes the "fulcrum S", and the lower link arm 35 on the opposite side becomes the "fulcrum S". The lower link first pivot hole 35a at the upper end serves as the "point of action K".

A distance L2 from the floor G to the contact point Q1 is greater than a distance L1 from the floor G to the fulcrum S. That is, since the fulcrum S of the cam member 40 is located below the contact point Q1, when the pressing force F is applied to the contact point Q1, which is the "force point", a straight line connecting the fulcrum S and the contact point Q1 is formed. The straight line connecting the fulcrum S and the contact point Q1 tries to rotate upward (counterclockwise in the figure) around the "fulcrum S" by the upward component force F1 in the direction perpendicular to the fulcrum.
Since the cam member 40 and the lower link arm 35 are integrally fixed, a downward rotating force is applied to the bolt inserted through the lower link first pivot hole 35a of the lower link arm 35 as a counteraction. .

The lower link first pivot hole 35a is pivotally connected to the lower base side pivot hole 23b of the vertical plate 23 of the base 21 of the caster member 20 with a bolt.
The caster member 20 is in contact with the floor G, and the base-side pivot hole 23b on the lower side of the base 21 does not move vertically. The fulcrum S of the cam member 40 is lifted as a reaction to the applied force of the downward rotation. Since the cam member 40 and the lower link arm 35 are integrated, the pedestal side pivot hole 23b (lower link first pivot hole 35a) on the lower side of the vertical plate 23 of the pedestal 21 of the caster member 20 is The contact Q1 is lifted together with the fulcrum S as the center of rotation.

The cam members 40 are provided at both ends 3 and 13 of the pallet support member 1, and mesh with both outer end faces p2 of the girders p1 on the side faces of the pallet P. When the head 16a is actuated, both cam members 40 are simultaneously rotated in the rising direction, so that the girders p1 on one side of the pallet P are lifted.

Since the upper and lower link arms 31 and 35 are parallel links, stepped upper and lower pins 60 and 60 are inserted into the upper and lower link second pivot holes 31b and 35b of the upper and lower link arms 31 and 35. 70 moves vertically upward as the link arms 31 and 35 are lifted and rotated. Since the stepped upper and lower pins 60 and 70 are pivotally attached to both ends of the pallet support member 1, the pallet P sandwiched between the support member 1 and the cam member 40 is also lifted and rotated by the link arms 31 and 35. move vertically upward with That is, the pallet P is lifted. Since the clamping surface 45 of the cam member 40 is formed in a convex arc shape, the contact point Q1 moves downward as the contact point Q1 of the cam member 40 is lifted.

When the pallet lift A is raised to a predetermined height, the electric box wrench is stopped and removed from the head 16a. When the electric box wrench is removed, the weight of the load N and the pallet P is added to the cam member 40, and the cam member 40 tries to rotate in the reverse direction (downward direction). Since it is fixed by the stopped nut member 18, it does not spread, and the holding surface 45 strongly abuts against the outer end surface p2 to prevent the reverse rotation of the cam member 40 and maintain the lifted state of the pallet P. The unevenness of the holding surface 45 bites into the outer end surface p2 of the girder p1 on the side surface of the pallet P to effectively hold the position. In other words, the pallet P does not slide down even if the electric box wrench is removed.

When the lifting operation of one pallet lift A is completed, the same operation is performed to lift the girder p1 on the opposite side of the pallet P. When the lifting of the pallet P is completed, the pallet P is pulled (or pushed) and moved.
When the pallet P is moved to the destination, an electric box wrench is attached to the head portion 16a of the screw member 16, and when the nut member 18 is rotated in the loosening direction, the cam member 40 is reversely rotated in the unloading direction, and the pallet P is moved to the floor surface. Drop it to G. When the electric box wrench is further operated, the cam member 40 is separated from the pallet P.

Although not shown, the radius R from the fulcrum S of the cam member 40 to the clamping surface 45 may be the same from top to bottom of the clamping surface 45, or it may gradually decrease from top to bottom as shown. You can let it run.

Next, a second embodiment will be described. The second embodiment is an example using a pad member 41 instead of the cam member 40 . Accordingly, the shape of the lower link arm 35 differs from that of the lower link arm 35 of the first embodiment. (Although not shown, the upper link arm 31 may also be used as described above.) The rest of the structure is the same as in the first embodiment.
The lower link arm 35 of the second embodiment extends obliquely upward from the end on the lower link second pivot hole 35b side (in other words, in the direction of the outer end surface p2 of the girder p1 on the side surface of the pallet P). A pad arm 37 extends obliquely upward) and is formed in an L shape. The tip of the pad arm 37 is provided with a pad pivot hole 37a. The distance L2 from the floor G to the pad pivot hole 37a (point of action K) is greater than the distance L1 from the floor G to the lower link second pivot hole 35b (fulcrum S).

The pad member 41 is composed of a pad attachment portion 42 and a pad 43 . The pad mounting portion 42 is composed of a pad mounting surface member 42a and a pair of pivotally mounted plate members 42b provided perpendicularly thereto, and the pivotal plate members 42b are provided with mounting holes 42h.
The pad 43 is made of, for example, a hard rubber plate and adhered to the pad mounting surface member 42a. The outer surface of the pad 43 serves as the holding surface 45 .
The pivot plate member 42b of the pad mounting portion 42 faces the tip side surface of the pad arm 37 extending from the lower link arm 35, and bolts are inserted into the pad pivot hole 37a of the pad arm 37 and the mounting hole 42h of the pivot plate member 42b. It is inserted through and pivotally mounted so as to be able to swing vertically.

Next, the operation of the second embodiment will be described. A pallet lift B is arranged along the girder p1 on the side surface of the pallet P as in the first embodiment. In this state, the nipping surfaces 45 of both the front and rear pad members 41 of the pallet lift B are separated from the outer end surfaces p2 of the girders p1 on the side surfaces of the pallet P. Then, as in the first embodiment, when the electric box wrench is operated, the support body 2 is drawn toward the head 16a through the nut member 18 screwed onto the screw 16c, and the holding surface of the pad member 41 is pulled. 45 is along the outer end surface p2 of the girder p1 on the side surface of the pallet P, and the entire surface thereof contacts.

When the electric box wrench is further operated from this state, the support body 2 is further drawn toward the head 16a, and the outer end surface p2 of the pallet P presses the pad member 40. As shown in FIG. Assuming that the pressing force F applied to the pad member 40 from the outer end face p2 is a horizontal force passing through the pivot point Q2 with respect to the pad arm 37, the line connecting the pivot point Q2 and the fulcrum S at the lower end of the lower link arm 35 is On the other hand, the lower link arm 35 tries to rotate about the fulcrum S in the upright direction due to the component force F1 in the perpendicular direction at the pivot point Q2.

Since the pad member 41 is pivoted so as to swing vertically at the pivot point Q2, the pad member 41 swings along with the rotation of the rising side, and the entire surface of the pad 43 comes into contact with the outer end surface p2 of the pallet P. do.

Then, when the lower link arm 35 attempts to rotate about the fulcrum S in the direction in which the pad member 41 rises, the lower link arm 35 moves toward the pedestal pivot hole 23b ( It rotates about the bolt of the lower link pivot hole 35a) in the direction of lifting the pad member 41. As shown in FIG.

The pad members 41 are provided on both ends 3 and 13 of the pallet support member 1, and are in contact with both outer end faces p2 of the girders p1 on one side of the pallet P. When the head 16a of the pallet P is actuated, both pad members 41 are simultaneously rotated in the raising direction, so that the girder p1 on one side of the pallet P is lifted. At this time, since the entire surface of the rubber pad 43 is in contact with the outer end surface p2 of the pallet P, the outer end surface p2 of the pallet P can be lifted without being damaged.
When the pallet lift B is raised to a predetermined height, the electric box wrench is stopped and removed from the head 16a. When the electric box wrench is removed, the weight of the load N and the pallet P is added to the pad member 41, and the pad member 41 tries to be pushed downward. Since it is fixed by the lower pin 70 (fulcrum S) at this point and does not spread forward and backward, the pad arm 37 is urged in the direction of pushing the pad member 41 into the outer end face p2 of the girders p1 on the side of the pallet P. As a result, the pad members 41 on both ends of the pallet support member 1 sandwich the outer end faces p2 of the girders p1 on the side faces of the pallet P from both sides, so that the pallet P does not slide down.

When the lifting operation of one pallet lift B is completed, the same operation is performed to lift the girder p1 on the opposite side of the pallet P. When the lifting of the pallet P is completed, the pallet P is pulled (or pushed) and removed at the destination.

A third embodiment of the present invention will be described. The pallet lift C of the third embodiment is used by being attached to the four corners of the pallet P as shown in FIGS. 12-14. Structurally, the sliding member 12 side has the same structure as in the first embodiment, using the cam member 40, the caster member 20, and the parallel link member 30. The difference is that a receiving member 50 is used.

The pallet P to which the pallet lift C of the third embodiment is applied is of the four-way insertion type having blocks p4 formed of rectangular lumber at the four corners shown in FIG. The length of the pallet support member 1 is short in accordance with this block p4. The mechanism portion having the cam member 40 pivotally attached to the slide member 12 side of the pallet support member 1 is the same as that of the first embodiment as described above.
A fixed clamping receiving member 50 is provided on the end portion 3 side of the support portion main body 2 . A fixed pinch receiving member 50 is bolted to the end portion 3 via a spacer 58 so as to be tightened together.

The clamping receiving member 50 has a clamping surface 55 that is formed in a convex arcuate shape and contacts the inner end surface p6 of the block p4 at one point. Similar to the cam member 40, the surface of the clamping surface 55 is formed with a large number of triangular unevenness in which grooves in the width direction are carved. The contact point Q3 of the clamping surface 55 with the inner end face p6 is above the contact point Q1 with the end face p5 of the cam member 40. As shown in FIG.

Thus, as shown in FIG. 14, the pallet lift C is arranged at one corner of the pallet P, and the screw member 16 is operated to clamp the outer and inner end faces p5 and p6 of the block p4.
When the electric box wrench is further operated from this state, the support body 2 is further drawn toward the head 16a, and the cam member 40 rotates in the rising direction, as in the first embodiment.

The cam member 40 and the holding member 50 are in contact with the outer and inner end surfaces p5 and p6 of the block p4 at points Q1 and Q3, and hold the block p4 therebetween. When the cam member 40 rotates in the lifting direction, the cam member 40 meshing with the outer end face p5 lifts the block p4 by the parallel lifting action of the parallel link member 30 shown in the first embodiment. However, at this point, the pallet P is tilted because the pallet lift C is attached only at one corner.
Although not shown, the contact point Q1 is lifted up to substantially the same height as the contact point Q3.

By performing the above operations at the four corners of the pallet P, the pallet P can be lifted horizontally. When the lifting of the pallet P is completed, the pallet P is pulled (or pushed) and removed at the destination. It should be noted that although a cam-shaped holding member 50 is used, instead of this, a ring-shaped member whose ring surface abuts against the inner end surface p6 and rotates may be used.

A fourth embodiment of the present invention will be described. The pallet lift D of the fourth embodiment is used by being attached to the four corners of the pallet P as shown in FIG. 12, as in the third embodiment. Structurally, the sliding member 12 side is the same as the second embodiment using the pad member 41, and has the same structure using the pad member 41, the caster member 20, and the parallel link member 30. FIG.
In the fourth embodiment, the clamping receiving member 51 on the fixed side is also of the pad type. The clamping receiving member 51 on the fixed side has the same structure as the pad member 41 on the slide member 12 side, and is composed of a pad mounting portion 52 and a pad 53 . The pad mounting portion 52 is composed of a pad mounting surface member 52a and a pair of pivotally attached plate members 52b provided perpendicularly thereto, and the pivotal plate members 52b are provided with mounting holes 52h.

The pad 53 is made of, for example, a hard rubber plate and adhered to the pad mounting surface member 52a. The outer surface of the pad 53 becomes the holding surface 55 .
The pad mounting portion 52 is fixed to the end portion 3 of the support body 2 via a spacer 58 by a bolt inserted through the mounting hole 52h. The entire surface of the pad 53 of the pad-type holding member 51 abuts against the inner end surface p6 of the block p4.
The attachment hole 52h of the pad-type holding member 51 is above the power point Q2 of the pad member 41 on the slide member 12 side.

Thus, as shown in FIG. 12, the pallet lift D is arranged at one corner of the pallet P, and the screw member 16 is operated to clamp the outer and inner end faces p5 and p6 of the block p4.
When the electric box wrench is further operated from this state, the supporting portion main body 2 is further drawn toward the head portion 16a as in the second embodiment, and the holding surface 45 of the pad member 41 and the pad-type holding member 51 are held. The surface 55 contacts the outer and inner end surfaces p5 and p6 of the block p4 of the pallet P.

When the electric box wrench is further operated from this state, the support body 2 is further drawn toward the head 16a, the outer end surface p2 of the pallet P presses the pad member 41, and the lower link is pulled as in the second embodiment. The arm 35 rotates upward about its fulcrum S, and lifts the block p4 at one corner while the block p4 is sandwiched between the pad-shaped holding member 51 and the pad member 41.例文帳に追加

When only the block p4 at one corner is lifted, the pallet P is tilted, but the pad-shaped clamping receiving member 51 and the pad member 41 swing up and down according to this tilting, and the pads 43, 53 remain clamped by the block p4. It does not shift.

When the lifting operation of the pallet lift D at one corner is completed, the same operation is performed at the remaining three corners to lift the pallet P horizontally. When the lifting of the pallet P is completed, the pallet P is pulled (or pushed) and moved.
Although not shown, the clamping receiving members 50 and 51 of the third and fourth embodiments are rotated upward by a spacer 58 provided at the end portion 3 of the support body 2 instead of the fixed clamping receiving member. , a one-way bearing that does not rotate downward may be used to contact the inner end surface p6 of the block p4 of the pallet P while rotating during lifting.

A to D: pallet lift, F: pressing force, F1: force component, G: floor surface, K: point of action, L1/L2: distance, N: cargo, P: pallet, p1: side girder, p2: outside End face, p20: inner girder, p30: edge board, p31: deck board, p4: four corner blocks, p40: inner block, p5: outer end face of block, p6: inner end face of block, Q1: contact point, Q2 : Pivot point for pad arm Q3: Contact point for inner end surface R/R1/R2: Radius S: Pivot point (fulcrum)
1: pallet support member, 2: support body, 3: outer end of support body, 4a: body side upper pivot hole, 4b: body side lower pivot hole, 5: insertion side end, 6: Round hole 12: slide member 12a: insertion/removal member main body 12b: screw fixing plate 13: outer end of slide member 14: holding block 14U/14D: upper/lower blocks 14a/14b: upper part Lower pivot hole 14h: rotation holding hole 15: telescopic drive member 16: screw member 16a: head 16b: neck 16c: screw portion 16d: screw receiving member 18: nut member 19: Rectangular tube member 19a: Upper pivot hole 19b: Lower pivot hole 20: Caster member 21: Base 22: Horizontal plate 23: Vertical plate 23a/23b: Base side pivot hole 29: Travel wheel 30: parallel link member 31: (upper) link arm 31a: upper link first pivot hole 31b: upper link second pivot hole 31c: upper link intermediate round hole 35: (lower ) link arm 35a: lower link first pivot hole 35b: lower link second pivot hole 35c: lower link intermediate round hole 37: pad arm 37a: pad pivot hole 40: cam Member, 40b: fulcrum hole, 40c: fixing round hole, 41: pad member, 42: pad mounting portion, 42a: pad mounting surface member, 42b: pivot plate member, 42h: mounting hole, 43: pad, 45: holding Surface 50: Clamping receiving member 51: Clamping receiving member 52: Pad mounting portion 52a: Pad mounting surface material 52b: Pivot plate member 52h: Mounting hole 53: Pad 55: Clamping surface 58: Spacer , 60: upper stepped pin, 61: large diameter portion, 63: link side shaft portion, 65: member side shaft portion, 68: spacer ring, 70: lower stepped pin, 71: narrow thick portion diameter portion 73: link side shaft portion 75: member side shaft portion 100: pallet lift of conventional pallet 110: pallet support member 120: roller

Claims (7)

a pallet support member comprising a support body arranged along the girders on the side surfaces of the pallet, and a slide member provided so as to be inserted into and removed from the support body in a horizontal direction;
an expansion/contraction drive member attached to the slide member and configured to move the support body in an insertion/removal direction;
caster members provided adjacent to both ends of the pallet support member and having traveling wheels;
a parallel link member that connects the end portion of the pallet support member and the caster member, and moves the pallet support member up and down with respect to the caster member;
a cam member attached to one of the link arms of the parallel link members and having a clamping surface that contacts and separates from the outer end surface of the girder on the side surface of the pallet,
The lower ends of link arms to which the cam members are attached are pivotally attached to the respective ends of the pallet support member so as to be vertically rotatable. A pallet lift characterized by being positioned below a contact point of a cam member with respect to. a pallet support member comprising a support body arranged along the girders on the side surfaces of the pallet, and a slide member provided so as to be inserted into and removed from the support body in a horizontal direction;
an expansion/contraction drive member attached to the slide member and configured to move the support body in an insertion/removal direction;
caster members provided adjacent to both ends of the pallet support member and having traveling wheels;
a parallel link member that connects the end portion of the pallet support member and the caster member, and moves the pallet support member up and down with respect to the caster member;
a pad member attached to one of the link arms of the parallel link member and having a holding surface that is entirely in contact with and separates from the outer end surface of the girder on the side surface of the pallet,
The link arm to which the pad member is attached has a pad arm extending obliquely upward from the end on the pallet support member side toward the outer end surface of the girder on the side surface of the pallet,
The pad arm has a pad pivot hole for pivoting the pad member so that it can swing vertically,
A portion of the link arm from which the pad arm extends is pivotally attached to each end of the pallet support member so as to be vertically rotatable, and a pivot portion S of the link arm is a pad pivot of the pad arm. A pallet lift characterized by being formed so as to be positioned below attachment holes. A pallet support member comprising: a support body arranged along the outer surface of blocks provided at four corners of the pallet; and a slide member provided so as to be horizontally inserted into and removed from the support body. ,
an expansion/contraction drive member attached to the slide member and configured to move the support body in an insertion/removal direction;
a caster member provided adjacent to an end of the slide member located outside the block of the pallet and having a traveling wheel;
a parallel link member that connects the end portion of the slide member and the caster member and moves the pallet support member up and down with respect to the caster member;
a cam member that is attached to one of the link arms of the parallel link members and has a clamping surface that contacts and separates from the outer end faces of the blocks of the pallet;
a clamping receiving member attached to the support body, contacting and separating from the inner end surface of the block opposite to the outer end surface on the side of the cam member, and clamping the inner and outer end surfaces of the block together with the cam member. ,
The lower ends of link arms to which the cam members are attached are pivotally attached to the respective ends of the pallet support member so as to be vertically rotatable. A pallet lift characterized by being positioned below a contact point of a cam member with respect to. A pallet support member comprising: a support body arranged along the outer surface of blocks provided at four corners of the pallet; and a slide member provided so as to be horizontally inserted into and removed from the support body. ,
an expansion/contraction drive member attached to the slide member and configured to move the support body in an insertion/removal direction;
a caster member provided adjacent to an end of the slide member located outside the block and having a traveling wheel;
a parallel link member that connects the end located outside the block and the caster member, and moves the pallet support member up and down with respect to the caster member;
a pad member that is attached to one of the link arms of the parallel link members and has a holding surface that is entirely in contact with and separates from the outer end surfaces of the blocks of the pallet;
a clamping receiving member that is mounted on the support body and has its entire surface contacting and separating from the inner end face of the block located on the opposite side of the outer end face, and clamps the inner and outer end faces of the block with the pad member. is,
The link arm to which the pad member is attached has a pad arm extending obliquely upward from the end on the slide member side toward the outer end surface of the block of the pallet,
The pad arm has a pad pivot hole for pivoting the pad member so that it can swing vertically,
A portion of the link arm from which the pad arm extends is pivotally attached to an end portion of the slide member so as to be vertically rotatable. A pallet lift characterized by being formed so as to be located below. The expansion/contraction driving member includes a screw member that is rotatable and is horizontally arranged on the slide member, and a nut member that is screwed on the screw member so as to be freely rotatable and is attached to the main body of the support portion. The pallet lift according to any one of claims 1 to 4, characterized by comprising: 4. A pallet lift according to claim 3, wherein the clamping surface of said clamping member is formed in a convex circular shape so as to make point contact with the end face of said clamping member. The clamping receiving member is pivotally attached to a spacer attached to the support body so as to be able to swing vertically, and includes a receiving pad member whose entire surface is in contact with the inner end surface of the block. The pallet lift according to claim 4.

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