JP3860742B2 - Connection structure of both open end parts of toothed belt and drive member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, both open end portions of the toothed belt of the conveying device using the toothed belt and the drive member are coupled with a hinge function, and both open end portions are free from each other around the drive pin that performs this hinge function. By having a swingable connection structure, it is possible to smoothly travel on a two-dimensional conveyance path having a curved conveyance path in a vertical-horizontal-vertical corner portion where the driving member of the conveyance device is bent in one direction. The present invention relates to a connection structure between an open end portion of a toothed belt and a drive member.
[0002]
[Prior art]
A technique relating to the connection method or structure of both open end portions of the toothed belt of the conveying device using the toothed belt and the driving member is described in Japanese Patent Application Laid-Open No. 2001-58715 filed by the present inventor. A drive bracket that fastens both open end portions of the toothed belt with a flexible spring, a plate and a joint, and can be buckled and freely connected to a carrier (driving member) disposed in the fastening portion. And the carrier are linked to each other so that an object conveyed on the carrier can move along a curved conveyance path (curved path) without any trouble.
[0003]
In this connection structure, since the carrier traveling path is a two-dimensional conveying path having a curved conveying path at horizontal-vertical-horizontal corners, the open end portions of the toothed belt are connected to the carrier of the conveying device. The part is required to be swung and bent, and due to restrictions on the installation space area, it is sufficient for problems such as reducing the radius of curvature of the curved conveyance path at the corner, or transferring a larger conveyance weight faster. I couldn't respond.
[0004]
[Problems to be solved by the invention]
The rapid processing of transported goods can satisfy most of the requirements by combining a transport device having a straight transport path and a two-dimensional transport device having a curved portion in a vertical-horizontal-vertical transport path subjected to bending in one direction. Is possible. Therefore, the two-dimensional transport apparatus has a curved transport path with a radius of curvature of the corner portion as small as possible, and transports a transport object having a larger weight further, and satisfies the problems of reducing the tact time.
[0005]
[Means for Solving the Problems]
The first gist of the present invention is to obtain a connection structure that firmly receives the toothed belt acting on both open end portions of the toothed belt without impairing the strength of the toothed belt. Therefore, a joint tooth plate having a plurality of tooth profile grooves identical to the tooth profile shape of the toothed belt is fitted to the tooth shape of the toothed belt, and a two-step concave groove is formed on one of the back surfaces of both open end portions. The other has two convex protrusions, and the convex protrusions are fitted into the first step groove portions of the two-step concave grooves, and the drive pins are inserted into the side surfaces of the convex protrusions and the two-step concave grooves to swing. A pair of joint plates having shaft holes for movably coupling is arranged, and these joint plates, both open end portions and joint tooth plates are integrally coupled with fixing bolts to form a connector.
[0006]
Further, an axis aligned with the shaft hole in a square hole formed by a one-step groove corresponding to a gap between the protrusions of the two convex protrusions of the joint plate and the convex protrusion of the two-step concave groove A drive member (carrier) having a hole is loosely fitted, and the drive member and both joint plates are coupled by drive pins. Accordingly, both open end portions of the toothed belt have a hinge function, and a connection structure is provided in which both open end portions can swing freely around the drive pin.
[0007]
With this connection structure, the external force acting on both open end portions of the toothed belt is distributed over the entire area where the connector mounting contact surfaces of both open end portions of the toothed belt are received and is received by the drive pin and its shaft hole. The external force is not concentrated at a specific location on the toothed belt, and the strength of the toothed belt itself can be prevented from being lost.
[0008]
The second gist of the present invention is to provide a connection structure of both open end portions of a toothed belt that is optimal for a drive member of a two-dimensional transport device having a curved transport path in a vertical-horizontal-vertical corner portion. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the entire connection structure between the open end portions 8 a and 8 a (see FIG. 2) of the toothed belt 8 and the drive member 1. FIG. 2 is an exploded perspective view showing the connection structure between the open end portions 8a, 8a of the toothed belt 8 and the drive member 1. FIG. 3A is a front center longitudinal side view of the connection structure of FIG. 1, and FIG. 3B is an end view (left or right side view).
[0010]
As shown in FIGS. 1 and 2, joint tooth plates 5 and 5 are arranged on predetermined tooth bottom surfaces of both open end portions 8a and 8a, and a joint plate 3 (plates 3a and 3b) is arranged on the back surface (tooth back surface). In this way, the three members are integrally connected with the fixing bolt 12 in a sandwich shape.
[0011]
As shown in FIG. 3B, the joint tooth plate 5 has a smaller tooth width than the toothed belt 8, has the same tooth shape as that of the toothed belt 8, and the number of threads. Bolt screw holes 9 through which the fixing bolts 12 are inserted are formed in the tooth tip surfaces of the predetermined peak portions for ensuring the above. Bolt screw holes 11 that coincide with the bolt screw holes 9 are formed in both open end portions 8a and 8a.
[0012]
The plate 3a of the joint plate 3 is disposed on the back surface of one open end portion 8a (right side in the figure), and is composed of a substantially concave plate having two convex protrusions 3e and 3e. Are formed with bolt screw holes 10 coinciding with the bolt screw holes 9 and 11.
[0013]
The plate 3b of the joint plate 3 is disposed on the back surface of the other open end portion 8a (the left side in the figure), and is formed of a substantially convex plate having two-step concave grooves 3d and 3f. Bolt screw holes 10 that match the bolt screw holes 9 and 11 are formed.
[0014]
The convex protrusions 3e and 3e are fitted into the two-step concave grooves 3d and 3d, and the drive pin 6 can be inserted into the shaft holes 7a and 7b formed so as to communicate with each other. Needless to say, the drive pin 6 is subjected to a retaining prevention process. It is desirable that the drive pin 6 is made of a surface-treated metal to obtain strength and wear resistance, and that the shaft holes 7a, 7b and 7c are further inserted with bushes to obtain wear resistance and lubrication performance. Further, the end faces of the convex protrusions 3e and 3e and the two-step concave grooves 3d and 3d are preferably formed on circular arc surfaces having a predetermined radius centered on the shaft holes 7a and 7b, respectively.
[0015]
The plates 3a and 3b connected by the drive pin 6 are formed with square holes 3c by fitting the convex protrusions 3e and 3e and the two-step concave grooves 3d and 3d. A drive block 2b of the drive member 1 is loosely fitted in 3c, and a shaft hole 7c is formed in the drive block 2b, and the drive pin 6 is inserted into the shaft hole 7c. A top plate 2a is coupled to the upper portion of the drive block 2b by appropriate fixing bolts. The conveyed product is appropriately placed on the top plate 2a.
[0016]
Thus, the open end portions 8a and 8a are connected to each other with a hinge function around the drive pin 6 via the joint plate 3 composed of the plates 3a and 3b. Is obtained.
[0017]
In this toothed belt open end connector, the tension acting on the toothed belt 8 is in the full width direction of the plurality of grooves of the joint tooth plates 5 and 5 that are in engagement with the tooth types of the toothed belt 8. Dispersed and received by the drive pin 6 and its shaft holes 7a, 7b, 7c and concentrated in the bolt screw hole 11, there is an advantage that the strength of the toothed belt 8 itself is not impaired.
[0018]
A two-dimensional conveying device using the toothed belt 8 is shown in FIG. In this two-dimensional transport device, when the distance between the driving pulley 18 and the driven pulley 19 becomes long, the toothed pulley 20 shown in FIGS. It is necessary to install in.
[0019]
FIG. 8 shows a conventional toothed belt open end connector used in a transport device that is conventionally used for a transport device that has a short distance between pulley shafts and that is not provided with a toothed pulley for stable running. Such a connector cannot collide with a toothed pulley provided between pulley shafts and cannot pass through. However, the width of the joint tooth plate 5 in the present invention is 2 × the width dimension of the toothed belt 8 from the belt width 8b of the toothed belt 8 to prevent collision with the toothed pulley 20 provided between the pulley shafts. As shown in FIG. 3, it is set so that it does not collide with the toothed pulley 20.
[0020]
Both the open end portions 8a and 8a are coupled to each other with a hinge function around the drive pin 6 via the joint plates 3a and 3b, so that a connection structure that can swing freely is obtained. It is possible to smoothly travel on the curved conveyance path 31 in the corner portion of the vertical-horizontal-vertical two-dimensional conveyance device that receives bending in one direction shown.
[0021]
Therefore, an optimum application of the connection structure between the open end portion of the toothed belt and the drive member will be described. 4 and 5 show the posture change state in the connection structure between the drive block 2b of the drive member 1 and the open end portions 8a and 8a in the straight conveyance path 30 and the curved conveyance path 31. FIG.
[0022]
When the drive member 1 enters the curved conveyance path 31 from the straight conveyance path 30 shown in FIG. 7, the curvature radius of the curved conveyance path 31 is centered around the drive pin 6 at the open end 8a of the toothed belt 8 which is the head. The following open end portion 8a follows the drive pin 6 as a center, and the drive member 1 reciprocates in the loose fitting direction (vertical direction in the drawing) via the drive pin 6 while the curved conveyance path 31 is moved. Pass through.
[0023]
FIG. 6 shows the motion of the open end portion 8a of the toothed belt 8 around the drive pin 6 when the drive member 1 passes through the curved conveyance path 31. A line segment AB is a line that passes through the axis of the driving member 1 and the center of the radius of curvature of the curved conveyance path 31. Point P is a contact point between one of the toothed pulleys 20 provided on the curved conveyance path 31 and the toothed belt 8.
[0024]
The distance that the open end portions 8a and 8a swing around the drive pin 6, that is, the swing angle θ is determined by the split angle 2θ of the toothed pulley 20 provided in the curved conveyance path 31. The drive member 1 has a right-angled triangle OPQ having a vertex of the curvature radius center O and an apex angle 2θ on the trajectory of the toothed belt 8 wound around the toothed pulley 20 provided in the curved conveyance path 31. It runs while forming each time it passes through the toothed pulley 20 provided at 31.
[0025]
As shown in FIG. 5, when the drive member 1 travels on the curved conveyance path 31, the drive block 2 b and the toothed belt open end connector are freely swung around the drive pin 6. The member 1 always maintains the same posture with respect to the center of curvature radius due to the centrifugal force, and the posture is changed by the toothed belt open end connector.
[0026]
Thus, the connection structure of the toothed belt open end connector of the present invention having a hinge function that swings around the drive pin 6 is the most suitable for the drive member 1 to move along the curved conveyance path 31 described above. It is a suitable structure.
[0027]
【The invention's effect】
According to the present invention described above, in the connection structure of both the open end portions of the drive member and the toothed belt, the drive pin distributes and receives the external force acting on the toothed belt, and the toothed belt itself in the open end portion itself. The strength of is not impaired. In addition, by using a connecting structure with a hinge function that swings around the drive pin, it is possible to drive in a two-dimensional transfer device that receives bending in one direction with a curved transfer path in the vertical-horizontal-vertical corner. The member always maintains a constant posture with respect to the center of curvature radius of the curved conveyance path and can smoothly run. Furthermore, the joint tooth plate and the joint plate are coupled with a rigid structure, and the drive member can be formed on the rigid structure so that it can be swung with a drive pin. Therefore, it becomes possible to carry heavy objects as compared with the conventional case.
[0028]
Moreover, since the connection structure is simplified, it is not only economical as a drive member for a two-dimensional transport device that receives a one-way bend with a curved transport path, but also with a transport apparatus having a straight transport path. A combination of transport devices having a vertical-horizontal-vertical two-dimensional transport path that undergoes bending in the direction can satisfy most requirements, so that a transport path having a corner portion or a curved portion having a small curvature radius can be obtained. It becomes possible, and a transporter having a larger weight can be transported further and the tact time can be reduced.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a drive member and a toothed belt open end connector.
FIG. 2 is an exploded perspective view of a drive member and a toothed belt open end connector.
3A is a partial cross-sectional front view of a drive member and a toothed belt open-end connector, and FIG. 3B is a partial cross-sectional side view thereof.
FIG. 4 is an explanatory diagram showing a running state of a driving member and a toothed belt open end connector on a straight conveyance path.
FIG. 5 is an explanatory diagram showing a running state of a drive member and a toothed belt open end connector on a curved conveyance path.
FIG. 6 is an explanatory diagram for explaining the movement of a drive member and a toothed belt open end connector in a curved conveyance path.
FIG. 7 is a front view showing a transport apparatus having a vertical-horizontal-vertical straight transport path and a curved transport path.
FIG. 8A is a plan view of a conventional toothed belt open end connector, and FIG. 8B is a central longitudinal front view thereof.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Drive member 2a ... Drive block 3 ... Joint plate 3a, 3b ... Plate 3c ... Square hole part 3d, 3f ... Two-step concave groove 3e ... Convex protrusion 5 ... Joint tooth plate 6 ... Drive pin 7a, 7b, 7c ... Shaft hole 8 ... Toothed belt 8a ... Open end parts 9, 10, 11 ... Bolt screw hole 12 ... Fixing bolt 30 ... Linear conveyance path 31 ... Curve conveyance path

Claims (2)

A connection structure between both open end portions of the toothed belt of the conveying device using the toothed belt and the driving member,
Fitting a joint tooth plate having a plurality of tooth type grooves that match the tooth shape of the toothed belt to the tooth parts of both open end parts,
One of the back surfaces of the two open end portions has a joint plate formed of a substantially concave plate having a two-step concave groove, and the other has a substantially convex projection having two convex protrusions fitted into the two-step concave groove. Joint plates made of convex-shaped plates are respectively mounted, and the open end portions are integrally fastened and combined with these joint plates and the joint tooth plates, respectively.
Fitting the two-step concave groove and the convex protrusion of the two joint plates to each other and loosely fitting the drive block of the drive member into the square hole formed by these; and
By inserting a drive pin into the drive block and the two-stage concave groove and convex projection and connecting the three so as to be swingable,
Both open end portions of the toothed belt have a hinge function via the drive pin, both open end portions can swing freely with respect to each other, and the drive block can swing in the loose fitting direction. Connection structure of the open end portion of the toothed belt and the drive member. The connection structure of both open end portions of the toothed belt and the drive member according to claim 1 is used in a two-dimensional transport device having a curved transport path in a vertical-horizontal-vertical corner portion having a unidirectional bending. A connecting structure of the open end portion of the toothed belt and the driving member.

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